starter

FreeRTOS + C++ + STL

alloc have to be fixed !

.gdb_history

@@ -0,0 +1,256 @@
+    withExternalMhartid = false,
+    mhartidWidth = 0,
+    pipelineCsrRead = false,
+    pipelinedInterrupt = false,
+    csrOhDecoder = false,
+    deterministicInteruptionEntry = false,
+    wfiOutput = false,
+    exportPrivilege = false,
+    withPrivilegedDebug = false,
+    debugTriggers = 0
+  )
+),
+load
+c
+load
+si
+load
+load
+load
+tar extended-remote :3333
+load
+si
+exit
+exit
+target extended-remote :3333
+dashboard -layout registers stack variables expressions memory 
+si
+file Demo/Common/build/freeRTOS_demo.elf
+load
+si
+b main
+c
+exit
+target extended-remote :3333
+target extended-remote :3333
+file Demo/Common/bin/freeRTOS_demo.elf
+load
+si
+b main
+c
+c
+load
+si
+si
+c
+si
+si
+si
+n
+c
+c
+load
+load
+b
+i b
+del
+b main
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+si
+si
+si
+si
+si
+load
+si
+si
+c
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+load
+si
+c
+si
+si
+dashboard -layout registers stack variables expressions memory 
+si
+c
+c
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+p/x TimeR::ptr->VALUE
+load
+load
+si
+i b
+c
+si
+n
+load
+c
+load
+load
+si
+c
+si
+n
+si
+load
+load
+c
+monitor reset halt
+si
+si
+monitor reset halt
+si
+c
+monitor reset halt
+si
+si
+c
+c
+c
+c
+c
+c
+c
+c
+c
+c
+monitor reset halt
+si
+c
+c
+p/x numbers
+monitor reset halt
+c
+p/x numbers
+ssi
+si
+load
+c
+c
+c
+c
+load
+del
+b main
+c
+n
+n
+monitor rest halt
+del
+load
+del
+b main
+si
+c
+si
+c
+c
+c
+c
+load
+del
+b main
+c
+n
+si
+si
+monitor reset halt
+si
+c
+si
+n
+n
+n
+dashboard 
+dashboard registers 
+dashboard -layout registers 
+si
+si
+si
+load
+set logging on
+set logging enabled on
+load
+si
+del
+b main
+c
+c
+si
+monitor reset halt
+c
+monitor reset halt
+load
+monitor reset halt
+si
+si
+c
+si
+n
+si
+load
+si
+c
+n
+n
+si
+n
+n
+load
+c
+n
+n

.gitignore

@@ -0,0 +1,9 @@
+*.o
+*.asm
+*.hex
+*.elf
+*~
+
+archBackup
+/.cproject
+/.project

Demo/Common/.gdb_history

@@ -0,0 +1,92 @@
+target extended-remote localhost:3333
+file bin/freeRTOS_demo.elf 
+load
+si
+dashboard -layout registers stack memory variables expressions breakpoints 
+si
+si
+b main
+c
+python import frertos_gdb
+python import frertos_gdb
+python import freertos_gdb
+freertos task 
+dashboard 
+si
+c
+si
+si
+load
+si
+c
+c
+si
+si
+load
+:q:qa!
+target extended-remote localhost:3333
+file bin/freeRTOS_demo.elf 
+ls
+file bin/freeRTOS_demo.elf
+load
+thon import freertos_gdbý¿¿»–º
+python import freertos_gdb
+freertos 
+dashboard -layout registers stack memory variables expressions breakpoints 
+dash
+dash
+dash
+dash
+si
+c
+b main
+c
+c
+c
+si
+c
+c
+del
+c
+c
+c
+freertos queue
+freertos task
+c
+freertos task
+freertos timer 
+freertos task
+freertos semaphore 
+freertos queue 
+load
+si
+b main
+c
+c
+c
+c
+c
+del
+c
+c
+c
+freertos task 
+freertos queue 
+file bin/freeRTOS_demo.elf 
+load
+si
+c
+c
+c
+c
+freertos queue 
+freertos 
+freertos semaphore 
+freertos timer 
+freertos task 
+c
+c
+si
+dashboard 
+si
+exit

Demo/Common/FreeRTOS-openocd.c

@@ -0,0 +1,20 @@
+/*
+ * Since at least FreeRTOS V7.5.3 uxTopUsedPriority is no longer
+ * present in the kernel, so it has to be supplied by other means for
+ * OpenOCD's threads awareness.
+ *
+ * Add this file to your project, and, if you're using --gc-sections,
+ * ``--undefined=uxTopUsedPriority'' (or
+ * ``-Wl,--undefined=uxTopUsedPriority'' when using gcc for final
+ * linking) to your LDFLAGS; same with all the other symbols you need.
+ */
+
+#include "FreeRTOS.h"
+
+#ifdef __GNUC__
+#define USED __attribute__((used))
+#else
+#define USED
+#endif
+
+const int USED uxTopUsedPriority = configMAX_PRIORITIES - 1;

Demo/Common/Makefile

@@ -0,0 +1,164 @@
+# File to be included in all makefiles
+
+PROJ_NAME = freeRTOS_demo
+RISCV_XLEN ?= 32
+RISCV_LIB  ?= elf
+ARCH ?= rv32i_zicsr
+OPT ?= O0 
+
+PRINT_ENABLE ?= yes
+
+TARGET=riscv32-unknown-${RISCV_LIB}
+GCC_PACK ?= yes
+RISCV_NAME ?= riscv32-unknown-elf
+
+ifeq ($(GCC_PACK),yes)
+	RISCV_PATH ?= /home/user/riscv/opt/rv32im/
+endif
+
+MABI = ilp32
+MARCH := rv32i_zicsr
+
+WARNINGS= -Wall -Wextra -Wshadow -Wpointer-arith -Wbad-function-cast -Wcast-align -Wsign-compare \
+		-Waggregate-return -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wunused
+
+FREERTOS_SOURCE_DIR	= ../../Source
+CUNIT	= ../../../cunit
+
+INCLUDES = \
+	-I. \
+	-I../arch \
+	-I.. \
+	-I./conf \
+	-I./include \
+	-I$(FREERTOS_SOURCE_DIR)/include \
+	-I../Common/include \
+	-I$(FREERTOS_SOURCE_DIR)/portable/GCC/RISCV
+
+CFLAGS = \
+	$(WARNINGS) $(INCLUDES) \
+	-fomit-frame-pointer -fno-strict-aliasing -fno-builtin \
+	-D__gracefulExit -mcmodel=medany \
+    	-march=$(ARCH)  -mabi=$(MABI) -ggdb3 -${OPT} 
+
+CXXFLAGS += -march=$(ARCH) \
+            -mabi=$(MABI) \
+            -DNDEBUG \
+            -fno-pic \
+            -MD \
+            -fstrict-volatile-bitfields \
+            -fno-strict-aliasing \
+            -std=c++11 \
+	    -ggdb3 -gdwarf-3 \
+            $(INCLUDES)
+
+ifeq ($(PRINT_ENABLE),yes)
+	CFLAGS += -DPRINT_ENABLE
+	CXXFLAGS += -DPRINT_ENABLE
+endif
+
+LDFLAGS	 = -g -T ../arch/link.ld -nostartfiles -static -march=$(ARCH) 
+LIBS	 = -L$(RISCV_PATH)/lib/gcc/$(TARGET)/$(GCCVER) \
+		   -L$(RISCV_PATH)/$(TARGET)/lib \
+		   -lc -lgcc -lstdc++\
+		   -I/home/user/opt/include
+
+RISCV_OBJCOPY = $(RISCV_PATH)/bin/$(RISCV_NAME)-objcopy
+RISCV_OBJDUMP = $(RISCV_PATH)/bin/$(RISCV_NAME)-objdump
+RISCV_CC = $(RISCV_PATH)/bin/$(RISCV_NAME)-gcc
+CXX = $(RISCV_PATH)/bin/$(RISCV_NAME)-g++
+
+SRCS = $(wildcard ../arch/*.c) \
+       $(wildcard ../arch/*.cpp) \
+       $(wildcard ../arch/*.S) \
+       $(wildcard ../Common/*.c) \
+       $(wildcard ../Common/*.cpp) \
+       $(wildcard ../Common/*.S) \
+       $(FREERTOS_SOURCE_DIR)/croutine.c \
+	   $(FREERTOS_SOURCE_DIR)/list.c \
+	   $(FREERTOS_SOURCE_DIR)/queue.c \
+	   $(FREERTOS_SOURCE_DIR)/tasks.c \
+	   $(FREERTOS_SOURCE_DIR)/timers.c \
+	   $(FREERTOS_SOURCE_DIR)/event_groups.c \
+	   $(FREERTOS_SOURCE_DIR)/portable/MemMang/heap_2.c \
+	   $(FREERTOS_SOURCE_DIR)/string.c \
+	   $(FREERTOS_SOURCE_DIR)/portable/GCC/RISCV/port.c \
+	   $(FREERTOS_SOURCE_DIR)/portable/GCC/RISCV/portasm.S \
+	   ../arch/boot.S
+
+OBJDIR = bin
+OBJS := $(SRCS)
+OBJS := $(OBJS:../arch/%.c=bin/arch/%.o)
+OBJS := $(OBJS:../arch/%.cpp=bin/arch/%.o)
+OBJS := $(OBJS:../arch/%.S=bin/arch/%.o)
+OBJS := $(OBJS:../Common/%.c=bin/Common/%.o)
+OBJS := $(OBJS:../Common/%.cpp=bin/Common/%.o)
+OBJS := $(OBJS:../Common/%.S=bin/Common/%.o)
+OBJS := $(OBJS:$(FREERTOS_SOURCE_DIR)/%.c=bin/freertos/%.o)
+OBJS := $(OBJS:$(FREERTOS_SOURCE_DIR)/%.cpp=bin/freertos/%.o)
+OBJS := $(OBJS:$(FREERTOS_SOURCE_DIR)/%.S=bin/freertos/%.o)
+
+all: $(OBJDIR)/$(PROJ_NAME).elf $(OBJDIR)/$(PROJ_NAME).hex $(OBJDIR)/$(PROJ_NAME).asm
+
+$(OBJDIR)/%.elf: $(OBJS) | $(OBJDIR)
+	$(CXX) $(CXXFLAGS) -o $@ $^ $(LDFLAGS) $(LIBS)
+
+$(OBJDIR)/%.hex: $(OBJDIR)/%.elf
+	$(RISCV_OBJCOPY) -O ihex $^ $@
+
+$(OBJDIR)/%.bin: $(OBJDIR)/%.elf
+	$(RISCV_OBJCOPY) -O binary $^ $@
+
+$(OBJDIR)/%.v: $(OBJDIR)/%.elf
+	$(RISCV_OBJCOPY) -O verilog $^ $@
+
+$(OBJDIR)/%.asm: $(OBJDIR)/%.elf
+	$(RISCV_OBJDUMP) -S -d $^ > $@
+
+$(OBJDIR)/arch/%.o: ../arch/%.c
+	mkdir -p $(dir $@)
+	$(RISCV_CC) -c $(CFLAGS) $(INC) -o $@ $^
+
+$(OBJDIR)/arch/%.o: ../arch/%.cpp
+	mkdir -p $(dir $@)
+	$(CXX) -c $(CXXFLAGS) $(INC) -o $@ $^
+
+$(OBJDIR)/arch/%.o: ../arch/%.S
+	mkdir -p $(dir $@)
+	$(RISCV_CC) -c $(CFLAGS) -o $@ $^ -D__ASSEMBLY__=1
+
+$(OBJDIR)/Common/%.o: ../Common/%.c
+	mkdir -p $(dir $@)
+	$(RISCV_CC) -c $(CFLAGS) $(INC) -o $@ $^
+
+$(OBJDIR)/Common/%.o: ../Common/%.cpp
+	mkdir -p $(dir $@)
+	$(CXX) -c $(CXXFLAGS) $(INC) -o $@ $^
+
+$(OBJDIR)/Common/%.o: ../Common/%.S
+	mkdir -p $(dir $@)
+	$(RISCV_CC) -c $(CFLAGS) -o $@ $^ -D__ASSEMBLY__=1
+
+$(OBJDIR)/freertos/%.o: $(FREERTOS_SOURCE_DIR)/%.c
+	mkdir -p $(dir $@)
+	$(RISCV_CC) -c $(CFLAGS) $(INC) -o $@ $^
+
+$(OBJDIR)/freertos/%.o: $(FREERTOS_SOURCE_DIR)/%.cpp
+	mkdir -p $(dir $@)
+	$(CXX) -c $(CXXFLAGS) $(INC) -o $@ $^
+
+$(OBJDIR)/freertos/%.o: $(FREERTOS_SOURCE_DIR)/%.S
+	mkdir -p $(dir $@)
+	$(RISCV_CC) -c $(CFLAGS) -o $@ $^ -D__ASSEMBLY__=1
+
+$(OBJDIR):
+	mkdir -p $@
+
+.PHONY: clean
+clean:
+	rm -rf $(OBJDIR)/*
+
+clean-all: clean
+
+.SECONDARY: $(OBJS)
+

Demo/Common/main.cpp

@@ -0,0 +1,147 @@
+#include "FreeRTOS.h"
+#include "task.h"
+#include "queue.h"
+#include "timers.h"
+#include "murax.h"
+
+#include <cstddef>
+
+#include <initializer_list>
+#include <cstdio>
+
+#define mainTIMER_PERIOD_MS (1 / portTICK_PERIOD_MS) // Ustawienie okresu timera na 1 sekundę
+#define QUEUE_LENGTH 5
+#define QUEUE_ITEM_SIZE sizeof(uint32_t)
+
+extern "C" {
+    void vApplicationMallocFailedHook(void);
+    void vApplicationStackOverflowHook(TaskHandle_t xTask, char *pcTaskName);
+}
+
+/*-----------------------------------------------------------*/
+
+// Deklaracja funkcji dla zadania i callbacku timera
+static void hungryTask(void *pvParameters);
+static void timerCallback(TimerHandle_t xTimer);
+
+// Globalna kolejka
+static QueueHandle_t xQueue;
+
+/*-----------------------------------------------------------*/
+
+
+
+// Modern C++ aproach
+// ---
+class TimeR {
+
+public:
+    static inline  uint32_t readValue() {
+        return ptr->VALUE;
+    }
+
+private:
+        static const Timer_Reg* ptr ;
+};
+
+const Timer_Reg* TimeR::ptr = reinterpret_cast<const Timer_Reg*>(0xF0020040);
+
+
+void test (std::initializer_list<int> vals) {
+    int  buffer[50];
+
+    for (auto p = vals.begin(); p != vals.end(); ++p) {
+
+        int * i = buffer;
+        *i++ = *p;
+        //        sprintf(buffer, "%d\n", *p);
+        // printf("%s", buffer);
+    }
+
+}
+
+#include <vector>
+
+int main(void) {
+
+std::vector<int> numbers;
+
+    // Dodawanie elementów do wektora
+    for (int i = 0; i < 10; ++i) {
+        numbers.push_back(i);
+    }
+
+    // Wypisywanie elementów wektora
+    char buffer[100];
+    sprintf(buffer, "Elements in the vector: ");
+
+    for (int number : numbers) {
+        sprintf(buffer, "%d ", number);
+    }
+    sprintf(buffer, "\n");
+
+    test({1,2,3,4,5});
+    
+	xQueue = xQueueCreate(QUEUE_LENGTH, QUEUE_ITEM_SIZE); // Tworzenie kolejki
+    if (xQueue == NULL) {
+        return -1; // Błąd podczas tworzenia kolejki
+    }
+
+    TimerHandle_t xCheckTimer = NULL;
+
+   /*
+    // Inicjalizacja timera
+    xCheckTimer = xTimerCreate("CheckTimer",
+                               mainTIMER_PERIOD_MS,
+                               pdTRUE,
+                               (void *)0,
+                               timerCallback);
+    */
+
+    // Start timera
+    if (xCheckTimer != NULL) {
+        xTimerStart(xCheckTimer, 0);
+    }
+
+    // Tworzenie zadania hungryTask
+    xTaskCreate(hungryTask, "Hungry Task", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY + 1, NULL);
+
+    // Uruchomienie planisty
+    vTaskStartScheduler();
+
+    // Teoretycznie nigdy nie powinniśmy tu dotrzeć
+    for (;;);
+    return 0;
+}
+
+/*-----------------------------------------------------------*/
+
+// Definicja funkcji callback timera
+static void timerCallback(TimerHandle_t xTimer) {
+    uint32_t ulValueToSend = 1; // Przykładowa wartość do wysłania
+    xQueueSendFromISR(xQueue, &ulValueToSend, NULL);
+}
+
+// Definicja zadania
+static void hungryTask(void *pvParameters) {
+    uint32_t ulReceivedValue;
+    for (;;) {
+    //    if (xQueueReceive(xQueue, &ulReceivedValue, portMAX_DELAY) == pdPASS) {
+            //printf("hungry\n"); // Drukowanie, gdy odbierzemy wartość z kolejki
+    //    }
+    }
+}
+
+/*-----------------------------------------------------------*/
+
+void vApplicationMallocFailedHook(void) {
+    for (;;);
+}
+
+void vApplicationIdleHook(void) {
+    // Można tu umieścić kod wykonywany w stanie bezczynności
+}
+
+void vApplicationStackOverflowHook(TaskHandle_t pxTask, char *pcTaskName) {
+    for (;;);
+}

Demo/arch/boot.S

@@ -0,0 +1,278 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution and was contributed
+    to the project by Technolution B.V. (www.technolution.nl,
+    freertos-riscv@technolution.eu) under the terms of the FreeRTOS
+    contributors license.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry''s de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+//#include "encoding.h"
+
+#if __riscv_xlen == 64
+# define STORE    sd
+# define LOAD     ld
+# define REGBYTES 8
+#else
+# define STORE    sw
+# define LOAD     lw
+# define REGBYTES 4
+#endif
+
+	.section .text,"ax",@progbits
+	.globl boot 
+boot:
+    li t6, 0x1800
+    csrw mstatus, t6
+    j _mstart
+
+	.align 6
+	.section .text,"ax",@progbits
+	.globl _mstart
+/* Startup code */
+_mstart:
+    la t0, trap_entry
+    csrw mtvec, t0
+    li	x1, 0
+    li	x2, 0
+    li	x3, 0
+    li	x4, 0
+    li	x5, 0
+    li	x6, 0
+    li	x7, 0
+    li	x8, 0
+    li	x9, 0
+    li	x10, 0
+    li	x11, 0
+    li	x12, 0
+    li	x13, 0
+    li	x14, 0
+    li	x15, 0
+    li	x16, 0
+    li	x17, 0
+    li	x18, 0
+    li	x19, 0
+    li	x20, 0
+    li	x21, 0
+    li	x22, 0
+    li	x23, 0
+    li	x24, 0
+    li	x25, 0
+    li	x26, 0
+    li	x27, 0
+    li	x28, 0
+    li	x29, 0
+    li	x30, 0
+    li	x31, 0
+
+    /* initialize global pointer */
+    la	gp, _gp
+
+init_bss:
+    /* init bss section */
+    la	a0, __bss_start
+    la	a1, __bss_end-4 /* section end is actually the start of the next section */
+    li	a2, 0x0
+    jal	fill_block
+
+init_sbss:
+    /* init bss section */
+    la	a0, __sbss_start
+    la	a1, __sbss_end-4 /* section end is actually the start of the next section */
+    li	a2, 0x0
+    jal	fill_block
+
+write_stack_pattern:
+    /* init bss section */
+    la	a0, _stack_end  /* note the stack grows from top to bottom */
+    la	a1, __stack-4   /* section end is actually the start of the next section */
+    li	a2, 0xABABABAB
+    jal	fill_block
+
+init_stack:
+    /* set stack pointer */
+    la	sp, _stack
+
+    call main
+// TODO	j	vSyscallInit
+
+/* When trap is an interrupt, this function is called */
+interrupt:
+	slli    t0,t0,1
+	srli    t0,t0,1
+	addi    t0,t0,-3
+	beq		t0,x0,softwareInterrupt
+	LOAD	t0, 0x0(sp)
+	addi	sp, sp, REGBYTES
+
+	/* Interupt is timer interrupt */
+	j		TIMER_CMP_INT
+	mret
+
+softwareInterrupt:
+	/* Interupt is software interrupt */
+	LOAD  t0, 0x0(sp)
+	addi  sp, sp, REGBYTES
+	mret
+
+/* For when a trap is fired */
+trap_entry:
+	/* Check for interrupt */
+	addi	sp, sp, -REGBYTES
+	STORE	t0, 0x0(sp)
+	csrr	t0, mcause
+	blt	t0,x0,interrupt
+	LOAD	t0, 0x0(sp)
+	addi	sp, sp, REGBYTES
+
+	/* System call and other traps */
+	addi sp, sp, -REGBYTES*31
+	STORE x1, 1*REGBYTES(sp)
+	STORE x2, 2*REGBYTES(sp)
+	STORE x3, 3*REGBYTES(sp)
+	STORE x4, 4*REGBYTES(sp)
+	STORE x5, 5*REGBYTES(sp)
+	STORE x6, 6*REGBYTES(sp)
+	STORE x7, 7*REGBYTES(sp)
+	STORE x8, 8*REGBYTES(sp)
+	STORE x9, 9*REGBYTES(sp)
+	STORE x10, 10*REGBYTES(sp)
+	STORE x11, 11*REGBYTES(sp)
+	STORE x12, 12*REGBYTES(sp)
+	STORE x13, 13*REGBYTES(sp)
+	STORE x14, 14*REGBYTES(sp)
+	STORE x15, 15*REGBYTES(sp)
+	STORE x16, 16*REGBYTES(sp)
+	STORE x17, 17*REGBYTES(sp)
+	STORE x18, 18*REGBYTES(sp)
+	STORE x19, 19*REGBYTES(sp)
+	STORE x20, 20*REGBYTES(sp)
+	STORE x21, 21*REGBYTES(sp)
+	STORE x22, 22*REGBYTES(sp)
+	STORE x23, 23*REGBYTES(sp)
+	STORE x24, 24*REGBYTES(sp)
+	STORE x25, 25*REGBYTES(sp)
+	STORE x26, 26*REGBYTES(sp)
+	STORE x27, 27*REGBYTES(sp)
+	STORE x28, 28*REGBYTES(sp)
+	STORE x29, 29*REGBYTES(sp)
+	STORE x30, 30*REGBYTES(sp)
+	STORE x31, 31*REGBYTES(sp)
+
+	csrr a0, mcause
+	csrr a1, mepc
+
+
+	mv a2, sp
+//TODO	jal ulSyscallTrap
+fatalException:
+	j fatalException
+
+	csrw mepc, a0
+
+	LOAD x1, 1*REGBYTES(sp)
+	LOAD x2, 2*REGBYTES(sp)
+	LOAD x3, 3*REGBYTES(sp)
+	LOAD x4, 4*REGBYTES(sp)
+	LOAD x5, 5*REGBYTES(sp)
+	LOAD x6, 6*REGBYTES(sp)
+	LOAD x7, 7*REGBYTES(sp)
+	LOAD x8, 8*REGBYTES(sp)
+	LOAD x9, 9*REGBYTES(sp)
+	LOAD x10, 10*REGBYTES(sp)
+	LOAD x11, 11*REGBYTES(sp)
+	LOAD x12, 12*REGBYTES(sp)
+	LOAD x13, 13*REGBYTES(sp)
+	LOAD x14, 14*REGBYTES(sp)
+	LOAD x15, 15*REGBYTES(sp)
+	LOAD x16, 16*REGBYTES(sp)
+	LOAD x17, 17*REGBYTES(sp)
+	LOAD x18, 18*REGBYTES(sp)
+	LOAD x19, 19*REGBYTES(sp)
+	LOAD x20, 20*REGBYTES(sp)
+	LOAD x21, 21*REGBYTES(sp)
+	LOAD x22, 22*REGBYTES(sp)
+	LOAD x23, 23*REGBYTES(sp)
+	LOAD x24, 24*REGBYTES(sp)
+	LOAD x25, 25*REGBYTES(sp)
+	LOAD x26, 26*REGBYTES(sp)
+	LOAD x27, 27*REGBYTES(sp)
+	LOAD x28, 28*REGBYTES(sp)
+	LOAD x29, 29*REGBYTES(sp)
+	LOAD x30, 30*REGBYTES(sp)
+	LOAD x31, 31*REGBYTES(sp)
+
+	addi sp, sp, REGBYTES*31
+	mret
+
+/* Fills memory blocks */
+fill_block:
+    sw		a2, 0(a0)
+    bgeu	a0, a1, fb_end
+    addi	a0, a0, 4
+    j		fill_block
+fb_end:
+    ret

Demo/arch/clib.c

@@ -0,0 +1,343 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution and was contributed
+    to the project by Technolution B.V. (www.technolution.nl,
+    freertos-riscv@technolution.eu) under the terms of the FreeRTOS
+    contributors license.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <limits.h>
+#include "clib.h""
+#define TEST_COM_BASE ((volatile uint32_t*)(0xF00FFF00))
+#define EXIT(code) TEST_COM_BASE[8] = code
+#define static_assert(cond) switch(0) { case 0: case !!(long)(cond): ; }
+
+/* Writes char to frontend. */
+#undef putchar
+int putchar(int ch)
+{
+	// static char buf[64] __attribute__((aligned(64)));
+	// static int buflen = 0;
+
+	// buf[buflen++] = ch;
+
+	// if (ch == '\n' || buflen == sizeof(buf)) {
+	// 	char* bufPtr = buf;
+	// 	while(buflen != 0){
+	// 		TEST_COM_BASE[0] = *(bufPtr++);  //TODO !!!!
+	// 		buflen--;
+	// 	}
+	// }
+
+	// return 0;
+}
+/*-----------------------------------------------------------*/
+
+/* Writes number to putchar. */
+static inline void printnum(void (*putch)(int, void**), void **putdat,
+		unsigned long long num, unsigned base, int width, int padc)
+{
+	unsigned digs[sizeof(num) * CHAR_BIT];
+	int pos = 0;
+
+	for(;;) {
+		digs[pos++] = num % base;
+		if (num < base)
+			break;
+		num /= base;
+	}
+
+	while (width-- > pos){
+		putch(padc, putdat);
+	}
+
+	while (pos-- > 0){
+		putch(digs[pos] + (digs[pos] >= 10 ? 'a' - 10 : '0'), putdat);
+	}
+}
+/*-----------------------------------------------------------*/
+
+/* Returns unsigned integer from argument list. */
+static unsigned long long getuint(va_list *ap, int lflag)
+{
+	if (lflag >= 2) {
+		return va_arg(*ap, unsigned long long);
+	} else if (lflag) {
+		return va_arg(*ap, unsigned long);
+	} else {
+		return va_arg(*ap, unsigned int);
+	}
+}
+/*-----------------------------------------------------------*/
+
+/* Returns signed integer from argument list. */
+static long long getint(va_list *ap, int lflag)
+{
+	if (lflag >= 2) {
+			return va_arg(*ap, long long);
+	} else if (lflag) {
+			return va_arg(*ap, long);
+	} else {
+			return va_arg(*ap, int);
+	}
+}
+/*-----------------------------------------------------------*/
+
+/* Format and print a string. */
+static void vFormatPrintString(void (*putch)(int, void**), void **putdat,
+			const char *fmt, va_list ap)
+{
+	register const char* p;
+	const char* last_fmt;
+	register int ch;
+	unsigned long long num;
+	int base, lflag, width, precision;
+	char padc;
+
+	while (1) {
+		while ((ch = *(unsigned char *) fmt) != '%') {
+			if (ch == '\0')
+				return;
+			fmt++;
+			putch(ch, putdat);
+		}
+		fmt++;
+
+		// Process a %-escape sequence
+		last_fmt = fmt;
+		padc = ' ';
+		width = -1;
+		precision = -1;
+		lflag = 0;
+		reswitch: switch (ch = *(unsigned char *) fmt++) {
+
+			/* flag to pad on the right */
+			case '-':
+				padc = '-';
+				goto reswitch;
+
+				/* flag to pad with 0's instead of spaces */
+			case '0':
+				padc = '0';
+				goto reswitch;
+
+				/* width field */
+			case '1':
+			case '2':
+			case '3':
+			case '4':
+			case '5':
+			case '6':
+			case '7':
+			case '8':
+			case '9':
+				for (precision = 0;; ++fmt) {
+					precision = precision * 10 + ch - '0';
+					ch = *fmt;
+					if (ch < '0' || ch > '9')
+						break;
+				}
+				goto process_precision;
+
+			case '*':
+				precision = va_arg(ap, int);
+				goto process_precision;
+
+			case '.':
+				if (width < 0)
+					width = 0;
+				goto reswitch;
+
+			case '#':
+				goto reswitch;
+
+				process_precision: if (width < 0)
+					width = precision, precision = -1;
+				goto reswitch;
+
+				/* long flag (doubled for long long) */
+			case 'l':
+				lflag++;
+				goto reswitch;
+
+				/* character */
+			case 'c':
+				putch(va_arg(ap, int), putdat);
+				break;
+
+				/* string */
+			case 's':
+				if ((p = va_arg(ap, char *)) == NULL)
+					p = "(null)";
+				if (width > 0 && padc != '-')
+					for (width -= strnlen(p, precision); width > 0; width--)
+						putch(padc, putdat);
+				for (; (ch = *p) != '\0' && (precision < 0 || --precision >= 0); width--) {
+					putch(ch, putdat);
+					p++;
+				}
+				for (; width > 0; width--)
+					putch(' ', putdat);
+				break;
+
+				/* (signed) decimal */
+			case 'd':
+				num = getint(&ap, lflag);
+				if ((long long) num < 0) {
+					putch('-', putdat);
+					num = -(long long) num;
+				}
+				base = 10;
+				goto signed_number;
+
+				/* unsigned decimal */
+			case 'u':
+				base = 10;
+				goto unsigned_number;
+
+				/* (unsigned) octal */
+			case 'o':
+				base = 8;
+				goto unsigned_number;
+
+				/* pointer */
+			case 'p':
+				static_assert(sizeof(long) == sizeof(void*))
+				;
+				lflag = 1;
+				putch('0', putdat);
+				putch('x', putdat);
+				/* no break, fall through to hexidecimal */
+				/* (unsigned) hexadecimal */
+			case 'x':
+				base = 16;
+				unsigned_number: num = getuint(&ap, lflag);
+				signed_number: printnum(putch, putdat, num, base, width, padc);
+				break;
+
+				/* escaped '%' character */
+			case '%':
+				putch(ch, putdat);
+				break;
+
+				/* unrecognized escape sequence */
+			default:
+				putch('%', putdat);
+				fmt = last_fmt;
+				break;
+		}
+	}
+}
+/*-----------------------------------------------------------*/
+
+/* Cause normal process termination  */
+void exit(int code)
+{
+	EXIT(code);
+	//TODO syscall(SYS_exit, code, 0, 0);
+	for(;;) { }
+}
+/*-----------------------------------------------------------*/
+
+/* formatted output conversion to frontend */
+int printf(const char* fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+
+	vFormatPrintString((void*) putchar, 0, fmt, ap);
+
+	va_end(ap);
+	return 0; // incorrect return value, but who cares, anyway?
+}
+/*-----------------------------------------------------------*/
+
+/* formatted output conversion to string */
+int sprintf(char* str, const char* fmt, ...)
+{
+	va_list ap;
+	char* str0 = str;
+	va_start(ap, fmt);
+
+	void sprintf_putch(int ch, void** data) {
+		char** pstr = (char**) data;
+		**pstr = ch;
+		(*pstr)++;
+	}
+
+	vFormatPrintString(sprintf_putch, (void**) &str, fmt, ap);
+	*str = 0;
+
+	va_end(ap);
+	return str - str0;
+}
+/*-----------------------------------------------------------*/

Demo/arch/clib.h

@@ -0,0 +1,83 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution and was contributed
+    to the project by Technolution B.V. (www.technolution.nl,
+    freertos-riscv@technolution.eu) under the terms of the FreeRTOS
+    contributors license.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#ifndef CLIB_H
+#define CLIB_H
+
+
+
+void exit(int code);
+int printf(const char* fmt, ...);
+int sprintf(char* str, const char* fmt, ...);
+
+#endif /* CLIB_H */
+

Demo/arch/link.ld

@@ -0,0 +1,170 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution and was contributed
+    to the project by Technolution B.V. (www.technolution.nl,
+    freertos-riscv@technolution.eu) under the terms of the FreeRTOS
+    contributors license.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+OUTPUT_ARCH( "riscv" )
+
+_STACK_SIZE = DEFINED(_STACK_SIZE) ? _STACK_SIZE : 0x10000;
+_HEAP_SIZE = DEFINED(_HEAP_SIZE) ? _HEAP_SIZE : 0x10000;
+
+/*****************************************************************************
+ * Define memory layout
+ ****************************************************************************/
+MEMORY {
+	imem : ORIGIN = 0x80000000, LENGTH = 0x00080000
+	dmem : ORIGIN = 0x80080000, LENGTH = 0x00060000
+}
+
+/* Specify the default entry point to the program */
+
+/*ENTRY(_mstart)*/
+ENTRY(boot)
+
+/*****************************************************************************
+ * Define the sections, and where they are mapped in memory 
+ ****************************************************************************/
+SECTIONS {
+	.text : {
+	    *boot.o(.text);
+		*(.text);
+		*(.text.*);
+	} > imem
+
+	.init : {
+	   KEEP (*(.init))
+	} > imem
+
+    .fini : {
+       KEEP (*(.fini))
+    } > imem
+
+    .rodata : {
+       __rodata_start = .;
+       *(.rodata)
+       *(.rodata.*)
+       *(.gnu.linkonce.r.*)
+       __rodata_end = .;
+	} > dmem
+
+	.sbss : {
+	   __sbss_start = .;
+	   *(.sbss)
+	   *(.sbss.*)
+	   *(.gnu.linkonce.sb.*)
+	   __sbss_end = .;
+	} > dmem
+	
+    .sdata : {
+        _gp = . + 0x800;
+        *(.srodata.cst16) *(.srodata.cst8) *(.srodata.cst4) *(.srodata.cst2) *(.srodata*)
+        *(.sdata .sdata.* .gnu.linkonce.s.*)
+     }	> dmem
+
+	.data : {
+	   . = ALIGN(4);
+	   __data_start = .;
+	   *(.data)
+	   *(.data.*)
+	   *(.gnu.linkonce.d.*)
+	   __data_end = .;
+	} > dmem
+
+    .bss : {
+       . = ALIGN(4);
+       __bss_start = .;
+       *(.bss)
+       *(.bss.*)
+       *(.gnu.linkonce.b.*)
+       *(COMMON)
+       . = ALIGN(4);
+       __bss_end = .;
+    } > dmem
+
+    /* Generate Stack and Heap definitions */
+
+    .heap : {
+       . = ALIGN(4);
+       _heap = .;
+       _heap_start = .;
+       . += _HEAP_SIZE;
+       _heap_end = .;
+    } > dmem
+
+    .stack : {
+       _stack_end = .;
+       . += _STACK_SIZE;
+       . = ALIGN(4);
+       _stack = .;
+       __stack = _stack;
+    } > dmem
+    
+    _end = .;
+}

Demo/arch/systemPort.c

@@ -0,0 +1,67 @@
+/*
+ * systemPort.c
+ *
+ *  Created on: Jul 24, 2017
+ *      Author: spinalvm
+ */
+
+
+#import "../conf/FreeRTOSConfig.h"
+
+#define mtime ((volatile uint64_t*)0xF00FFF40u)
+#define mtime32 ((volatile uint32_t*) mtime)
+#define timecmp ((volatile uint64_t*)0xF00FFF48u)
+
+#include "../arch/vexriscv/murax.h"
+
+/*-----------------------------------------------------------*/
+
+/* Sets the next timer interrupt
+ */
+void prvSetNextTimerInterrupt(void)
+{
+
+    TIMER_INTERRUPT->PENDINGS = 1;
+
+    /*
+    uint32_t mtimeHigh, mtimeLow;
+
+	//Get 64 bits mtime value via 32 bits access
+	do{
+		mtimeHigh = mtime32[1];
+		mtimeLow = mtime32[0];
+	}while(mtimeHigh != mtime32[1]);
+
+	*timecmp = ((((uint64_t) mtimeHigh) << 32) | mtimeLow) + (configTICK_CLOCK_HZ / configTICK_RATE_HZ);
+    */
+}
+/*-----------------------------------------------------------*/
+
+/* Sets and enable the timer interrupt */
+void vPortSetupTimer(void)
+{
+	prvSetNextTimerInterrupt();
+
+	/* Enable timer interupt */
+	// __asm volatile("csrs mie,%0"::"r"(0x80));
+
+        interruptCtrl_init(TIMER_INTERRUPT);
+        prescaler_init(TIMER_PRESCALER);
+        timer_init(TIMER_A);
+
+        TIMER_PRESCALER->LIMIT = 500;
+
+        TIMER_A->LIMIT = 1000;
+        TIMER_A->CLEARS_TICKS = 0x00010002;
+
+        TIMER_INTERRUPT->PENDINGS = 0xF;
+       
+       __asm volatile(
+            "li t0, 0x880\n\t"
+            "csrw mie, t0\n\t"
+       );
+
+
+}
+
+

Demo/arch/vexriscv/gpio.h

@@ -0,0 +1,15 @@
+#ifndef GPIO_H_
+#define GPIO_H_
+
+
+typedef struct
+{
+  volatile uint32_t INPUT;
+  volatile uint32_t OUTPUT;
+  volatile uint32_t OUTPUT_ENABLE;
+} Gpio_Reg;
+
+
+#endif /* GPIO_H_ */
+
+

Demo/arch/vexriscv/interrupt.h

@@ -0,0 +1,17 @@
+#ifndef INTERRUPTCTRL_H_
+#define INTERRUPTCTRL_H_
+
+#include <stdint.h>
+
+typedef struct
+{
+  volatile uint32_t PENDINGS;
+  volatile uint32_t MASKS;
+} InterruptCtrl_Reg;
+
+static void interruptCtrl_init(InterruptCtrl_Reg* reg){
+	reg->MASKS = 0;
+	reg->PENDINGS = 0xFFFFFFFF;
+}
+
+#endif /* INTERRUPTCTRL_H_ */

Demo/arch/vexriscv/murax.h

@@ -0,0 +1,17 @@
+#ifndef __MURAX_H__
+#define __MURAX_H__
+
+#include "timer.h"
+#include "prescaler.h"
+#include "interrupt.h"
+#include "gpio.h"
+#include "uart.h"
+
+#define GPIO_A    ((Gpio_Reg*)(0xF0000000))
+#define TIMER_PRESCALER ((Prescaler_Reg*)0xF0020000)
+#define TIMER_INTERRUPT ((InterruptCtrl_Reg*)0xF0020010)
+#define TIMER_A ((Timer_Reg*)0xF0020040)
+#define TIMER_B ((Timer_Reg*)0xF0020050)
+#define UART      ((Uart_Reg*)(0xF0010000))
+
+#endif /* __MURAX_H__ */

Demo/arch/vexriscv/prescaler.h

@@ -0,0 +1,16 @@
+#ifndef PRESCALERCTRL_H_
+#define PRESCALERCTRL_H_
+
+#include <stdint.h>
+
+
+typedef struct
+{
+  volatile uint32_t LIMIT;
+} Prescaler_Reg;
+
+static void prescaler_init(Prescaler_Reg* reg){
+
+}
+
+#endif /* PRESCALERCTRL_H_ */

Demo/arch/vexriscv/timer.h

@@ -0,0 +1,20 @@
+#ifndef TIMERCTRL_H_
+#define TIMERCTRL_H_
+
+#include <stdint.h>
+
+
+typedef struct
+{
+  volatile uint32_t CLEARS_TICKS;
+  volatile uint32_t LIMIT;
+  volatile uint32_t VALUE;
+} Timer_Reg;
+
+static void timer_init(Timer_Reg *reg){
+	reg->CLEARS_TICKS  = 0;
+	reg->VALUE = 0;
+}
+
+
+#endif /* TIMERCTRL_H_ */

Demo/arch/vexriscv/uart.h

@@ -0,0 +1,42 @@
+#ifndef UART_H_
+#define UART_H_
+
+
+typedef struct
+{
+  volatile uint32_t DATA;
+  volatile uint32_t STATUS;
+  volatile uint32_t CLOCK_DIVIDER;
+  volatile uint32_t FRAME_CONFIG;
+} Uart_Reg;
+
+enum UartParity {NONE = 0,EVEN = 1,ODD = 2};
+enum UartStop {ONE = 0,TWO = 1};
+
+typedef struct {
+	uint32_t dataLength;
+	enum UartParity parity;
+	enum UartStop stop;
+	uint32_t clockDivider;
+} Uart_Config;
+
+static uint32_t uart_writeAvailability(Uart_Reg *reg){
+	return (reg->STATUS >> 16) & 0xFF;
+}
+static uint32_t uart_readOccupancy(Uart_Reg *reg){
+	return reg->STATUS >> 24;
+}
+
+static void uart_write(Uart_Reg *reg, uint32_t data){
+	while(uart_writeAvailability(reg) == 0);
+	reg->DATA = data;
+}
+
+static void uart_applyConfig(Uart_Reg *reg, Uart_Config *config){
+	reg->CLOCK_DIVIDER = config->clockDivider;
+	reg->FRAME_CONFIG = ((config->dataLength-1) << 0) | (config->parity << 8) | (config->stop << 16);
+}
+
+#endif /* UART_H_ */
+
+

Demo/conf/FreeRTOSConfig.h

@@ -0,0 +1,144 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+
+#ifndef FREERTOS_CONFIG_H
+#define FREERTOS_CONFIG_H
+
+
+/*-----------------------------------------------------------
+ * Application specific definitions.
+ *
+ * These definitions should be adjusted for your particular hardware and
+ * application requirements.
+ *
+ * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
+ * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
+ *
+ * See http://www.freertos.org/a00110.html.
+ *----------------------------------------------------------*/
+
+#include <stdint.h>
+#include "portmacro.h"
+extern uint32_t SystemCoreClock;
+
+#define configUSE_PREEMPTION			1
+#define configUSE_IDLE_HOOK				0
+#define configUSE_TICK_HOOK				0
+#define configCPU_CLOCK_HZ			( ( unsigned long ) 2000000 )
+#define configTICK_CLOCK_HZ			( ( unsigned long ) 2000000 )
+#define configTICK_RATE_HZ			( ( TickType_t ) 1000)
+#define configMAX_PRIORITIES		( 5 )
+#define configMINIMAL_STACK_SIZE	( ( unsigned short ) 1024 )
+#define configTOTAL_HEAP_SIZE		( ( size_t ) ( 100 * 1024 ) )
+#define configMAX_TASK_NAME_LEN			( 16 )
+#define configUSE_TRACE_FACILITY		1
+#define configUSE_16_BIT_TICKS			0
+#define configIDLE_SHOULD_YIELD			1
+#define configUSE_MUTEXES				1
+#define configQUEUE_REGISTRY_SIZE		8
+#define configCHECK_FOR_STACK_OVERFLOW	2
+#define configUSE_RECURSIVE_MUTEXES		1
+#define configUSE_MALLOC_FAILED_HOOK	1
+#define configUSE_APPLICATION_TASK_TAG	0
+#define configUSE_COUNTING_SEMAPHORES	1
+#define configGENERATE_RUN_TIME_STATS	0
+
+/* Co-routine definitions. */
+#define configUSE_CO_ROUTINES 			0
+#define configMAX_CO_ROUTINE_PRIORITIES ( 2 )
+
+/* Software timer definitions. */
+#define configUSE_TIMERS				1
+#define configTIMER_TASK_PRIORITY		( 2 )
+#define configTIMER_QUEUE_LENGTH		4
+#define configTIMER_TASK_STACK_DEPTH	( configMINIMAL_STACK_SIZE )
+
+/* Set the following definitions to 1 to include the API function, or zero
+to exclude the API function. */
+#define INCLUDE_vTaskPrioritySet		1
+#define INCLUDE_uxTaskPriorityGet		1
+#define INCLUDE_vTaskDelete				1
+#define INCLUDE_vTaskCleanUpResources	1
+#define INCLUDE_vTaskSuspend			1
+#define INCLUDE_vTaskDelayUntil			1
+#define INCLUDE_vTaskDelay				1
+#define INCLUDE_eTaskGetState			1
+
+/* Normal assert() semantics without relying on the provision of an assert.h
+header file. */
+#define configASSERT( x ) if( ( x ) == 0 ) { taskDISABLE_INTERRUPTS(); for( ;; ); }
+
+/* Definitions that map the FreeRTOS port interrupt handlers to their CMSIS
+standard names - or at least those used in the unmodified vector table. */
+#define vPortSVCHandler SVCall_Handler
+#define xPortPendSVHandler PendSV_Handler
+#define xPortSysTickHandler SysTick_Handler
+
+#endif /* FREERTOS_CONFIG_H */

README.md

@@ -0,0 +1,7 @@
+# FreeRTOS port to RISC-V privileged spec 1.9.1
+
+This is based on https://github.com/illustris/FreeRTOS-RISCV with minor fixes and improvements.
+
+The fixes allow this code to run nicely in a Rocket RISC-V processor with a hardware configuration string and a local interrupt controller (Clint) using preemption.
+
+Tested in Spike and Verilator with several builds including single-task, multi-task and typical demo test including queues, semaphores, mutexes and about a dozen concurrent tasks.

Source/croutine.c

@@ -0,0 +1,395 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#include "FreeRTOS.h"
+#include "task.h"
+#include "croutine.h"
+
+/* Remove the whole file is co-routines are not being used. */
+#if( configUSE_CO_ROUTINES != 0 )
+
+/*
+ * Some kernel aware debuggers require data to be viewed to be global, rather
+ * than file scope.
+ */
+#ifdef portREMOVE_STATIC_QUALIFIER
+	#define static
+#endif
+
+
+/* Lists for ready and blocked co-routines. --------------------*/
+static List_t pxReadyCoRoutineLists[ configMAX_CO_ROUTINE_PRIORITIES ];	/*< Prioritised ready co-routines. */
+static List_t xDelayedCoRoutineList1;									/*< Delayed co-routines. */
+static List_t xDelayedCoRoutineList2;									/*< Delayed co-routines (two lists are used - one for delays that have overflowed the current tick count. */
+static List_t * pxDelayedCoRoutineList;									/*< Points to the delayed co-routine list currently being used. */
+static List_t * pxOverflowDelayedCoRoutineList;							/*< Points to the delayed co-routine list currently being used to hold co-routines that have overflowed the current tick count. */
+static List_t xPendingReadyCoRoutineList;								/*< Holds co-routines that have been readied by an external event.  They cannot be added directly to the ready lists as the ready lists cannot be accessed by interrupts. */
+
+/* Other file private variables. --------------------------------*/
+CRCB_t * pxCurrentCoRoutine = NULL;
+static UBaseType_t uxTopCoRoutineReadyPriority = 0;
+static TickType_t xCoRoutineTickCount = 0, xLastTickCount = 0, xPassedTicks = 0;
+
+/* The initial state of the co-routine when it is created. */
+#define corINITIAL_STATE	( 0 )
+
+/*
+ * Place the co-routine represented by pxCRCB into the appropriate ready queue
+ * for the priority.  It is inserted at the end of the list.
+ *
+ * This macro accesses the co-routine ready lists and therefore must not be
+ * used from within an ISR.
+ */
+#define prvAddCoRoutineToReadyQueue( pxCRCB )																		\
+{																													\
+	if( pxCRCB->uxPriority > uxTopCoRoutineReadyPriority )															\
+	{																												\
+		uxTopCoRoutineReadyPriority = pxCRCB->uxPriority;															\
+	}																												\
+	vListInsertEnd( ( List_t * ) &( pxReadyCoRoutineLists[ pxCRCB->uxPriority ] ), &( pxCRCB->xGenericListItem ) );	\
+}
+
+/*
+ * Utility to ready all the lists used by the scheduler.  This is called
+ * automatically upon the creation of the first co-routine.
+ */
+static void prvInitialiseCoRoutineLists( void );
+
+/*
+ * Co-routines that are readied by an interrupt cannot be placed directly into
+ * the ready lists (there is no mutual exclusion).  Instead they are placed in
+ * in the pending ready list in order that they can later be moved to the ready
+ * list by the co-routine scheduler.
+ */
+static void prvCheckPendingReadyList( void );
+
+/*
+ * Macro that looks at the list of co-routines that are currently delayed to
+ * see if any require waking.
+ *
+ * Co-routines are stored in the queue in the order of their wake time -
+ * meaning once one co-routine has been found whose timer has not expired
+ * we need not look any further down the list.
+ */
+static void prvCheckDelayedList( void );
+
+/*-----------------------------------------------------------*/
+
+BaseType_t xCoRoutineCreate( crCOROUTINE_CODE pxCoRoutineCode, UBaseType_t uxPriority, UBaseType_t uxIndex )
+{
+BaseType_t xReturn;
+CRCB_t *pxCoRoutine;
+
+	/* Allocate the memory that will store the co-routine control block. */
+	pxCoRoutine = ( CRCB_t * ) pvPortMalloc( sizeof( CRCB_t ) );
+	if( pxCoRoutine )
+	{
+		/* If pxCurrentCoRoutine is NULL then this is the first co-routine to
+		be created and the co-routine data structures need initialising. */
+		if( pxCurrentCoRoutine == NULL )
+		{
+			pxCurrentCoRoutine = pxCoRoutine;
+			prvInitialiseCoRoutineLists();
+		}
+
+		/* Check the priority is within limits. */
+		if( uxPriority >= configMAX_CO_ROUTINE_PRIORITIES )
+		{
+			uxPriority = configMAX_CO_ROUTINE_PRIORITIES - 1;
+		}
+
+		/* Fill out the co-routine control block from the function parameters. */
+		pxCoRoutine->uxState = corINITIAL_STATE;
+		pxCoRoutine->uxPriority = uxPriority;
+		pxCoRoutine->uxIndex = uxIndex;
+		pxCoRoutine->pxCoRoutineFunction = pxCoRoutineCode;
+
+		/* Initialise all the other co-routine control block parameters. */
+		vListInitialiseItem( &( pxCoRoutine->xGenericListItem ) );
+		vListInitialiseItem( &( pxCoRoutine->xEventListItem ) );
+
+		/* Set the co-routine control block as a link back from the ListItem_t.
+		This is so we can get back to the containing CRCB from a generic item
+		in a list. */
+		listSET_LIST_ITEM_OWNER( &( pxCoRoutine->xGenericListItem ), pxCoRoutine );
+		listSET_LIST_ITEM_OWNER( &( pxCoRoutine->xEventListItem ), pxCoRoutine );
+
+		/* Event lists are always in priority order. */
+		listSET_LIST_ITEM_VALUE( &( pxCoRoutine->xEventListItem ), ( ( TickType_t ) configMAX_CO_ROUTINE_PRIORITIES - ( TickType_t ) uxPriority ) );
+
+		/* Now the co-routine has been initialised it can be added to the ready
+		list at the correct priority. */
+		prvAddCoRoutineToReadyQueue( pxCoRoutine );
+
+		xReturn = pdPASS;
+	}
+	else
+	{
+		xReturn = errCOULD_NOT_ALLOCATE_REQUIRED_MEMORY;
+	}
+
+	return xReturn;
+}
+/*-----------------------------------------------------------*/
+
+void vCoRoutineAddToDelayedList( TickType_t xTicksToDelay, List_t *pxEventList )
+{
+TickType_t xTimeToWake;
+
+	/* Calculate the time to wake - this may overflow but this is
+	not a problem. */
+	xTimeToWake = xCoRoutineTickCount + xTicksToDelay;
+
+	/* We must remove ourselves from the ready list before adding
+	ourselves to the blocked list as the same list item is used for
+	both lists. */
+	( void ) uxListRemove( ( ListItem_t * ) &( pxCurrentCoRoutine->xGenericListItem ) );
+
+	/* The list item will be inserted in wake time order. */
+	listSET_LIST_ITEM_VALUE( &( pxCurrentCoRoutine->xGenericListItem ), xTimeToWake );
+
+	if( xTimeToWake < xCoRoutineTickCount )
+	{
+		/* Wake time has overflowed.  Place this item in the
+		overflow list. */
+		vListInsert( ( List_t * ) pxOverflowDelayedCoRoutineList, ( ListItem_t * ) &( pxCurrentCoRoutine->xGenericListItem ) );
+	}
+	else
+	{
+		/* The wake time has not overflowed, so we can use the
+		current block list. */
+		vListInsert( ( List_t * ) pxDelayedCoRoutineList, ( ListItem_t * ) &( pxCurrentCoRoutine->xGenericListItem ) );
+	}
+
+	if( pxEventList )
+	{
+		/* Also add the co-routine to an event list.  If this is done then the
+		function must be called with interrupts disabled. */
+		vListInsert( pxEventList, &( pxCurrentCoRoutine->xEventListItem ) );
+	}
+}
+/*-----------------------------------------------------------*/
+
+static void prvCheckPendingReadyList( void )
+{
+	/* Are there any co-routines waiting to get moved to the ready list?  These
+	are co-routines that have been readied by an ISR.  The ISR cannot access
+	the	ready lists itself. */
+	while( listLIST_IS_EMPTY( &xPendingReadyCoRoutineList ) == pdFALSE )
+	{
+		CRCB_t *pxUnblockedCRCB;
+
+		/* The pending ready list can be accessed by an ISR. */
+		portDISABLE_INTERRUPTS();
+		{
+			pxUnblockedCRCB = ( CRCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( (&xPendingReadyCoRoutineList) );
+			( void ) uxListRemove( &( pxUnblockedCRCB->xEventListItem ) );
+		}
+		portENABLE_INTERRUPTS();
+
+		( void ) uxListRemove( &( pxUnblockedCRCB->xGenericListItem ) );
+		prvAddCoRoutineToReadyQueue( pxUnblockedCRCB );
+	}
+}
+/*-----------------------------------------------------------*/
+
+static void prvCheckDelayedList( void )
+{
+CRCB_t *pxCRCB;
+
+	xPassedTicks = xTaskGetTickCount() - xLastTickCount;
+	while( xPassedTicks )
+	{
+		xCoRoutineTickCount++;
+		xPassedTicks--;
+
+		/* If the tick count has overflowed we need to swap the ready lists. */
+		if( xCoRoutineTickCount == 0 )
+		{
+			List_t * pxTemp;
+
+			/* Tick count has overflowed so we need to swap the delay lists.  If there are
+			any items in pxDelayedCoRoutineList here then there is an error! */
+			pxTemp = pxDelayedCoRoutineList;
+			pxDelayedCoRoutineList = pxOverflowDelayedCoRoutineList;
+			pxOverflowDelayedCoRoutineList = pxTemp;
+		}
+
+		/* See if this tick has made a timeout expire. */
+		while( listLIST_IS_EMPTY( pxDelayedCoRoutineList ) == pdFALSE )
+		{
+			pxCRCB = ( CRCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( pxDelayedCoRoutineList );
+
+			if( xCoRoutineTickCount < listGET_LIST_ITEM_VALUE( &( pxCRCB->xGenericListItem ) ) )
+			{
+				/* Timeout not yet expired. */
+				break;
+			}
+
+			portDISABLE_INTERRUPTS();
+			{
+				/* The event could have occurred just before this critical
+				section.  If this is the case then the generic list item will
+				have been moved to the pending ready list and the following
+				line is still valid.  Also the pvContainer parameter will have
+				been set to NULL so the following lines are also valid. */
+				( void ) uxListRemove( &( pxCRCB->xGenericListItem ) );
+
+				/* Is the co-routine waiting on an event also? */
+				if( pxCRCB->xEventListItem.pvContainer )
+				{
+					( void ) uxListRemove( &( pxCRCB->xEventListItem ) );
+				}
+			}
+			portENABLE_INTERRUPTS();
+
+			prvAddCoRoutineToReadyQueue( pxCRCB );
+		}
+	}
+
+	xLastTickCount = xCoRoutineTickCount;
+}
+/*-----------------------------------------------------------*/
+
+void vCoRoutineSchedule( void )
+{
+	/* See if any co-routines readied by events need moving to the ready lists. */
+	prvCheckPendingReadyList();
+
+	/* See if any delayed co-routines have timed out. */
+	prvCheckDelayedList();
+
+	/* Find the highest priority queue that contains ready co-routines. */
+	while( listLIST_IS_EMPTY( &( pxReadyCoRoutineLists[ uxTopCoRoutineReadyPriority ] ) ) )
+	{
+		if( uxTopCoRoutineReadyPriority == 0 )
+		{
+			/* No more co-routines to check. */
+			return;
+		}
+		--uxTopCoRoutineReadyPriority;
+	}
+
+	/* listGET_OWNER_OF_NEXT_ENTRY walks through the list, so the co-routines
+	 of the	same priority get an equal share of the processor time. */
+	listGET_OWNER_OF_NEXT_ENTRY( pxCurrentCoRoutine, &( pxReadyCoRoutineLists[ uxTopCoRoutineReadyPriority ] ) );
+
+	/* Call the co-routine. */
+	( pxCurrentCoRoutine->pxCoRoutineFunction )( pxCurrentCoRoutine, pxCurrentCoRoutine->uxIndex );
+
+	return;
+}
+/*-----------------------------------------------------------*/
+
+static void prvInitialiseCoRoutineLists( void )
+{
+UBaseType_t uxPriority;
+
+	for( uxPriority = 0; uxPriority < configMAX_CO_ROUTINE_PRIORITIES; uxPriority++ )
+	{
+		vListInitialise( ( List_t * ) &( pxReadyCoRoutineLists[ uxPriority ] ) );
+	}
+
+	vListInitialise( ( List_t * ) &xDelayedCoRoutineList1 );
+	vListInitialise( ( List_t * ) &xDelayedCoRoutineList2 );
+	vListInitialise( ( List_t * ) &xPendingReadyCoRoutineList );
+
+	/* Start with pxDelayedCoRoutineList using list1 and the
+	pxOverflowDelayedCoRoutineList using list2. */
+	pxDelayedCoRoutineList = &xDelayedCoRoutineList1;
+	pxOverflowDelayedCoRoutineList = &xDelayedCoRoutineList2;
+}
+/*-----------------------------------------------------------*/
+
+BaseType_t xCoRoutineRemoveFromEventList( const List_t *pxEventList )
+{
+CRCB_t *pxUnblockedCRCB;
+BaseType_t xReturn;
+
+	/* This function is called from within an interrupt.  It can only access
+	event lists and the pending ready list.  This function assumes that a
+	check has already been made to ensure pxEventList is not empty. */
+	pxUnblockedCRCB = ( CRCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( pxEventList );
+	( void ) uxListRemove( &( pxUnblockedCRCB->xEventListItem ) );
+	vListInsertEnd( ( List_t * ) &( xPendingReadyCoRoutineList ), &( pxUnblockedCRCB->xEventListItem ) );
+
+	if( pxUnblockedCRCB->uxPriority >= pxCurrentCoRoutine->uxPriority )
+	{
+		xReturn = pdTRUE;
+	}
+	else
+	{
+		xReturn = pdFALSE;
+	}
+
+	return xReturn;
+}
+
+#endif /* configUSE_CO_ROUTINES == 0 */
+

Source/event_groups.c

@@ -0,0 +1,683 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+/* Standard includes. */
+#include <stdlib.h>
+
+/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
+all the API functions to use the MPU wrappers.  That should only be done when
+task.h is included from an application file. */
+#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+/* FreeRTOS includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+#include "timers.h"
+#include "event_groups.h"
+
+/* Lint e961 and e750 are suppressed as a MISRA exception justified because the
+MPU ports require MPU_WRAPPERS_INCLUDED_FROM_API_FILE to be defined for the
+header files above, but not in this file, in order to generate the correct
+privileged Vs unprivileged linkage and placement. */
+#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE /*lint !e961 !e750. */
+
+#if ( INCLUDE_xEventGroupSetBitFromISR == 1 ) && ( configUSE_TIMERS == 0 )
+	#error configUSE_TIMERS must be set to 1 to make the xEventGroupSetBitFromISR() function available.
+#endif
+
+#if ( INCLUDE_xEventGroupSetBitFromISR == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 0 )
+	#error INCLUDE_xTimerPendFunctionCall must also be set to one to make the xEventGroupSetBitFromISR() function available.
+#endif
+
+/* The following bit fields convey control information in a task's event list
+item value.  It is important they don't clash with the
+taskEVENT_LIST_ITEM_VALUE_IN_USE definition. */
+#if configUSE_16_BIT_TICKS == 1
+	#define eventCLEAR_EVENTS_ON_EXIT_BIT	0x0100U
+	#define eventUNBLOCKED_DUE_TO_BIT_SET	0x0200U
+	#define eventWAIT_FOR_ALL_BITS			0x0400U
+	#define eventEVENT_BITS_CONTROL_BYTES	0xff00U
+#else
+	#define eventCLEAR_EVENTS_ON_EXIT_BIT	0x01000000UL
+	#define eventUNBLOCKED_DUE_TO_BIT_SET	0x02000000UL
+	#define eventWAIT_FOR_ALL_BITS			0x04000000UL
+	#define eventEVENT_BITS_CONTROL_BYTES	0xff000000UL
+#endif
+
+typedef struct xEventGroupDefinition
+{
+	EventBits_t uxEventBits;
+	List_t xTasksWaitingForBits;		/*< List of tasks waiting for a bit to be set. */
+
+	#if( configUSE_TRACE_FACILITY == 1 )
+		UBaseType_t uxEventGroupNumber;
+	#endif
+
+} EventGroup_t;
+
+/*-----------------------------------------------------------*/
+
+/*
+ * Test the bits set in uxCurrentEventBits to see if the wait condition is met.
+ * The wait condition is defined by xWaitForAllBits.  If xWaitForAllBits is
+ * pdTRUE then the wait condition is met if all the bits set in uxBitsToWaitFor
+ * are also set in uxCurrentEventBits.  If xWaitForAllBits is pdFALSE then the
+ * wait condition is met if any of the bits set in uxBitsToWait for are also set
+ * in uxCurrentEventBits.
+ */
+static BaseType_t prvTestWaitCondition( const EventBits_t uxCurrentEventBits, const EventBits_t uxBitsToWaitFor, const BaseType_t xWaitForAllBits );
+
+/*-----------------------------------------------------------*/
+
+EventGroupHandle_t xEventGroupCreate( void )
+{
+EventGroup_t *pxEventBits;
+
+	pxEventBits = ( EventGroup_t * ) pvPortMalloc( sizeof( EventGroup_t ) );
+	if( pxEventBits != NULL )
+	{
+		pxEventBits->uxEventBits = 0;
+		vListInitialise( &( pxEventBits->xTasksWaitingForBits ) );
+		traceEVENT_GROUP_CREATE( pxEventBits );
+	}
+	else
+	{
+		traceEVENT_GROUP_CREATE_FAILED();
+	}
+
+	return ( EventGroupHandle_t ) pxEventBits;
+}
+/*-----------------------------------------------------------*/
+
+EventBits_t xEventGroupSync( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet, const EventBits_t uxBitsToWaitFor, TickType_t xTicksToWait )
+{
+EventBits_t uxOriginalBitValue, uxReturn;
+EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
+BaseType_t xAlreadyYielded;
+BaseType_t xTimeoutOccurred = pdFALSE;
+
+	configASSERT( ( uxBitsToWaitFor & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
+	configASSERT( uxBitsToWaitFor != 0 );
+	#if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )
+	{
+		configASSERT( !( ( xTaskGetSchedulerState() == taskSCHEDULER_SUSPENDED ) && ( xTicksToWait != 0 ) ) );
+	}
+	#endif
+
+	vTaskSuspendAll();
+	{
+		uxOriginalBitValue = pxEventBits->uxEventBits;
+
+		( void ) xEventGroupSetBits( xEventGroup, uxBitsToSet );
+
+		if( ( ( uxOriginalBitValue | uxBitsToSet ) & uxBitsToWaitFor ) == uxBitsToWaitFor )
+		{
+			/* All the rendezvous bits are now set - no need to block. */
+			uxReturn = ( uxOriginalBitValue | uxBitsToSet );
+
+			/* Rendezvous always clear the bits.  They will have been cleared
+			already unless this is the only task in the rendezvous. */
+			pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
+
+			xTicksToWait = 0;
+		}
+		else
+		{
+			if( xTicksToWait != ( TickType_t ) 0 )
+			{
+				traceEVENT_GROUP_SYNC_BLOCK( xEventGroup, uxBitsToSet, uxBitsToWaitFor );
+
+				/* Store the bits that the calling task is waiting for in the
+				task's event list item so the kernel knows when a match is
+				found.  Then enter the blocked state. */
+				vTaskPlaceOnUnorderedEventList( &( pxEventBits->xTasksWaitingForBits ), ( uxBitsToWaitFor | eventCLEAR_EVENTS_ON_EXIT_BIT | eventWAIT_FOR_ALL_BITS ), xTicksToWait );
+
+				/* This assignment is obsolete as uxReturn will get set after
+				the task unblocks, but some compilers mistakenly generate a
+				warning about uxReturn being returned without being set if the
+				assignment is omitted. */
+				uxReturn = 0;
+			}
+			else
+			{
+				/* The rendezvous bits were not set, but no block time was
+				specified - just return the current event bit value. */
+				uxReturn = pxEventBits->uxEventBits;
+			}
+		}
+	}
+	xAlreadyYielded = xTaskResumeAll();
+
+	if( xTicksToWait != ( TickType_t ) 0 )
+	{
+		if( xAlreadyYielded == pdFALSE )
+		{
+			portYIELD_WITHIN_API();
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+
+		/* The task blocked to wait for its required bits to be set - at this
+		point either the required bits were set or the block time expired.  If
+		the required bits were set they will have been stored in the task's
+		event list item, and they should now be retrieved then cleared. */
+		uxReturn = uxTaskResetEventItemValue();
+
+		if( ( uxReturn & eventUNBLOCKED_DUE_TO_BIT_SET ) == ( EventBits_t ) 0 )
+		{
+			/* The task timed out, just return the current event bit value. */
+			taskENTER_CRITICAL();
+			{
+				uxReturn = pxEventBits->uxEventBits;
+
+				/* Although the task got here because it timed out before the
+				bits it was waiting for were set, it is possible that since it
+				unblocked another task has set the bits.  If this is the case
+				then it needs to clear the bits before exiting. */
+				if( ( uxReturn & uxBitsToWaitFor ) == uxBitsToWaitFor )
+				{
+					pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
+				}
+				else
+				{
+					mtCOVERAGE_TEST_MARKER();
+				}
+			}
+			taskEXIT_CRITICAL();
+
+			xTimeoutOccurred = pdTRUE;
+		}
+		else
+		{
+			/* The task unblocked because the bits were set. */
+		}
+
+		/* Control bits might be set as the task had blocked should not be
+		returned. */
+		uxReturn &= ~eventEVENT_BITS_CONTROL_BYTES;
+	}
+
+	traceEVENT_GROUP_SYNC_END( xEventGroup, uxBitsToSet, uxBitsToWaitFor, xTimeoutOccurred );
+
+	return uxReturn;
+}
+/*-----------------------------------------------------------*/
+
+EventBits_t xEventGroupWaitBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToWaitFor, const BaseType_t xClearOnExit, const BaseType_t xWaitForAllBits, TickType_t xTicksToWait )
+{
+EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
+EventBits_t uxReturn, uxControlBits = 0;
+BaseType_t xWaitConditionMet, xAlreadyYielded;
+BaseType_t xTimeoutOccurred = pdFALSE;
+
+	/* Check the user is not attempting to wait on the bits used by the kernel
+	itself, and that at least one bit is being requested. */
+	configASSERT( xEventGroup );
+	configASSERT( ( uxBitsToWaitFor & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
+	configASSERT( uxBitsToWaitFor != 0 );
+	#if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )
+	{
+		configASSERT( !( ( xTaskGetSchedulerState() == taskSCHEDULER_SUSPENDED ) && ( xTicksToWait != 0 ) ) );
+	}
+	#endif
+
+	vTaskSuspendAll();
+	{
+		const EventBits_t uxCurrentEventBits = pxEventBits->uxEventBits;
+
+		/* Check to see if the wait condition is already met or not. */
+		xWaitConditionMet = prvTestWaitCondition( uxCurrentEventBits, uxBitsToWaitFor, xWaitForAllBits );
+
+		if( xWaitConditionMet != pdFALSE )
+		{
+			/* The wait condition has already been met so there is no need to
+			block. */
+			uxReturn = uxCurrentEventBits;
+			xTicksToWait = ( TickType_t ) 0;
+
+			/* Clear the wait bits if requested to do so. */
+			if( xClearOnExit != pdFALSE )
+			{
+				pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
+			}
+			else
+			{
+				mtCOVERAGE_TEST_MARKER();
+			}
+		}
+		else if( xTicksToWait == ( TickType_t ) 0 )
+		{
+			/* The wait condition has not been met, but no block time was
+			specified, so just return the current value. */
+			uxReturn = uxCurrentEventBits;
+		}
+		else
+		{
+			/* The task is going to block to wait for its required bits to be
+			set.  uxControlBits are used to remember the specified behaviour of
+			this call to xEventGroupWaitBits() - for use when the event bits
+			unblock the task. */
+			if( xClearOnExit != pdFALSE )
+			{
+				uxControlBits |= eventCLEAR_EVENTS_ON_EXIT_BIT;
+			}
+			else
+			{
+				mtCOVERAGE_TEST_MARKER();
+			}
+
+			if( xWaitForAllBits != pdFALSE )
+			{
+				uxControlBits |= eventWAIT_FOR_ALL_BITS;
+			}
+			else
+			{
+				mtCOVERAGE_TEST_MARKER();
+			}
+
+			/* Store the bits that the calling task is waiting for in the
+			task's event list item so the kernel knows when a match is
+			found.  Then enter the blocked state. */
+			vTaskPlaceOnUnorderedEventList( &( pxEventBits->xTasksWaitingForBits ), ( uxBitsToWaitFor | uxControlBits ), xTicksToWait );
+
+			/* This is obsolete as it will get set after the task unblocks, but
+			some compilers mistakenly generate a warning about the variable
+			being returned without being set if it is not done. */
+			uxReturn = 0;
+
+			traceEVENT_GROUP_WAIT_BITS_BLOCK( xEventGroup, uxBitsToWaitFor );
+		}
+	}
+	xAlreadyYielded = xTaskResumeAll();
+
+	if( xTicksToWait != ( TickType_t ) 0 )
+	{
+		if( xAlreadyYielded == pdFALSE )
+		{
+			portYIELD_WITHIN_API();
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+
+		/* The task blocked to wait for its required bits to be set - at this
+		point either the required bits were set or the block time expired.  If
+		the required bits were set they will have been stored in the task's
+		event list item, and they should now be retrieved then cleared. */
+		uxReturn = uxTaskResetEventItemValue();
+
+		if( ( uxReturn & eventUNBLOCKED_DUE_TO_BIT_SET ) == ( EventBits_t ) 0 )
+		{
+			taskENTER_CRITICAL();
+			{
+				/* The task timed out, just return the current event bit value. */
+				uxReturn = pxEventBits->uxEventBits;
+
+				/* It is possible that the event bits were updated between this
+				task leaving the Blocked state and running again. */
+				if( prvTestWaitCondition( uxReturn, uxBitsToWaitFor, xWaitForAllBits ) != pdFALSE )
+				{
+					if( xClearOnExit != pdFALSE )
+					{
+						pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
+					}
+					else
+					{
+						mtCOVERAGE_TEST_MARKER();
+					}
+				}
+				else
+				{
+					mtCOVERAGE_TEST_MARKER();
+				}
+			}
+			taskEXIT_CRITICAL();
+
+			/* Prevent compiler warnings when trace macros are not used. */
+			xTimeoutOccurred = pdFALSE;
+		}
+		else
+		{
+			/* The task unblocked because the bits were set. */
+		}
+
+		/* The task blocked so control bits may have been set. */
+		uxReturn &= ~eventEVENT_BITS_CONTROL_BYTES;
+	}
+	traceEVENT_GROUP_WAIT_BITS_END( xEventGroup, uxBitsToWaitFor, xTimeoutOccurred );
+
+	return uxReturn;
+}
+/*-----------------------------------------------------------*/
+
+EventBits_t xEventGroupClearBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToClear )
+{
+EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
+EventBits_t uxReturn;
+
+	/* Check the user is not attempting to clear the bits used by the kernel
+	itself. */
+	configASSERT( xEventGroup );
+	configASSERT( ( uxBitsToClear & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
+
+	taskENTER_CRITICAL();
+	{
+		traceEVENT_GROUP_CLEAR_BITS( xEventGroup, uxBitsToClear );
+
+		/* The value returned is the event group value prior to the bits being
+		cleared. */
+		uxReturn = pxEventBits->uxEventBits;
+
+		/* Clear the bits. */
+		pxEventBits->uxEventBits &= ~uxBitsToClear;
+	}
+	taskEXIT_CRITICAL();
+
+	return uxReturn;
+}
+/*-----------------------------------------------------------*/
+
+#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 1 ) && ( configUSE_TIMERS == 1 ) )
+
+	BaseType_t xEventGroupClearBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToClear )
+	{
+		BaseType_t xReturn;
+
+		traceEVENT_GROUP_CLEAR_BITS_FROM_ISR( xEventGroup, uxBitsToClear );
+		xReturn = xTimerPendFunctionCallFromISR( vEventGroupClearBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToClear, NULL );
+
+		return xReturn;
+	}
+
+#endif
+/*-----------------------------------------------------------*/
+
+EventBits_t xEventGroupGetBitsFromISR( EventGroupHandle_t xEventGroup )
+{
+UBaseType_t uxSavedInterruptStatus;
+EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
+EventBits_t uxReturn;
+
+	uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
+	{
+		uxReturn = pxEventBits->uxEventBits;
+	}
+	portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
+
+	return uxReturn;
+}
+/*-----------------------------------------------------------*/
+
+EventBits_t xEventGroupSetBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet )
+{
+ListItem_t *pxListItem, *pxNext;
+ListItem_t const *pxListEnd;
+List_t *pxList;
+EventBits_t uxBitsToClear = 0, uxBitsWaitedFor, uxControlBits;
+EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
+BaseType_t xMatchFound = pdFALSE;
+
+	/* Check the user is not attempting to set the bits used by the kernel
+	itself. */
+	configASSERT( xEventGroup );
+	configASSERT( ( uxBitsToSet & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
+
+	pxList = &( pxEventBits->xTasksWaitingForBits );
+	pxListEnd = listGET_END_MARKER( pxList ); /*lint !e826 !e740 The mini list structure is used as the list end to save RAM.  This is checked and valid. */
+	vTaskSuspendAll();
+	{
+		traceEVENT_GROUP_SET_BITS( xEventGroup, uxBitsToSet );
+
+		pxListItem = listGET_HEAD_ENTRY( pxList );
+
+		/* Set the bits. */
+		pxEventBits->uxEventBits |= uxBitsToSet;
+
+		/* See if the new bit value should unblock any tasks. */
+		while( pxListItem != pxListEnd )
+		{
+			pxNext = listGET_NEXT( pxListItem );
+			uxBitsWaitedFor = listGET_LIST_ITEM_VALUE( pxListItem );
+			xMatchFound = pdFALSE;
+
+			/* Split the bits waited for from the control bits. */
+			uxControlBits = uxBitsWaitedFor & eventEVENT_BITS_CONTROL_BYTES;
+			uxBitsWaitedFor &= ~eventEVENT_BITS_CONTROL_BYTES;
+
+			if( ( uxControlBits & eventWAIT_FOR_ALL_BITS ) == ( EventBits_t ) 0 )
+			{
+				/* Just looking for single bit being set. */
+				if( ( uxBitsWaitedFor & pxEventBits->uxEventBits ) != ( EventBits_t ) 0 )
+				{
+					xMatchFound = pdTRUE;
+				}
+				else
+				{
+					mtCOVERAGE_TEST_MARKER();
+				}
+			}
+			else if( ( uxBitsWaitedFor & pxEventBits->uxEventBits ) == uxBitsWaitedFor )
+			{
+				/* All bits are set. */
+				xMatchFound = pdTRUE;
+			}
+			else
+			{
+				/* Need all bits to be set, but not all the bits were set. */
+			}
+
+			if( xMatchFound != pdFALSE )
+			{
+				/* The bits match.  Should the bits be cleared on exit? */
+				if( ( uxControlBits & eventCLEAR_EVENTS_ON_EXIT_BIT ) != ( EventBits_t ) 0 )
+				{
+					uxBitsToClear |= uxBitsWaitedFor;
+				}
+				else
+				{
+					mtCOVERAGE_TEST_MARKER();
+				}
+
+				/* Store the actual event flag value in the task's event list
+				item before removing the task from the event list.  The
+				eventUNBLOCKED_DUE_TO_BIT_SET bit is set so the task knows
+				that is was unblocked due to its required bits matching, rather
+				than because it timed out. */
+				( void ) xTaskRemoveFromUnorderedEventList( pxListItem, pxEventBits->uxEventBits | eventUNBLOCKED_DUE_TO_BIT_SET );
+			}
+
+			/* Move onto the next list item.  Note pxListItem->pxNext is not
+			used here as the list item may have been removed from the event list
+			and inserted into the ready/pending reading list. */
+			pxListItem = pxNext;
+		}
+
+		/* Clear any bits that matched when the eventCLEAR_EVENTS_ON_EXIT_BIT
+		bit was set in the control word. */
+		pxEventBits->uxEventBits &= ~uxBitsToClear;
+	}
+	( void ) xTaskResumeAll();
+
+	return pxEventBits->uxEventBits;
+}
+/*-----------------------------------------------------------*/
+
+void vEventGroupDelete( EventGroupHandle_t xEventGroup )
+{
+EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
+const List_t *pxTasksWaitingForBits = &( pxEventBits->xTasksWaitingForBits );
+
+	vTaskSuspendAll();
+	{
+		traceEVENT_GROUP_DELETE( xEventGroup );
+
+		while( listCURRENT_LIST_LENGTH( pxTasksWaitingForBits ) > ( UBaseType_t ) 0 )
+		{
+			/* Unblock the task, returning 0 as the event list is being deleted
+			and	cannot therefore have any bits set. */
+			configASSERT( pxTasksWaitingForBits->xListEnd.pxNext != ( ListItem_t * ) &( pxTasksWaitingForBits->xListEnd ) );
+			( void ) xTaskRemoveFromUnorderedEventList( pxTasksWaitingForBits->xListEnd.pxNext, eventUNBLOCKED_DUE_TO_BIT_SET );
+		}
+
+		vPortFree( pxEventBits );
+	}
+	( void ) xTaskResumeAll();
+}
+/*-----------------------------------------------------------*/
+
+/* For internal use only - execute a 'set bits' command that was pended from
+an interrupt. */
+void vEventGroupSetBitsCallback( void *pvEventGroup, const uint32_t ulBitsToSet )
+{
+	( void ) xEventGroupSetBits( pvEventGroup, ( EventBits_t ) ulBitsToSet );
+}
+/*-----------------------------------------------------------*/
+
+/* For internal use only - execute a 'clear bits' command that was pended from
+an interrupt. */
+void vEventGroupClearBitsCallback( void *pvEventGroup, const uint32_t ulBitsToClear )
+{
+	( void ) xEventGroupClearBits( pvEventGroup, ( EventBits_t ) ulBitsToClear );
+}
+/*-----------------------------------------------------------*/
+
+static BaseType_t prvTestWaitCondition( const EventBits_t uxCurrentEventBits, const EventBits_t uxBitsToWaitFor, const BaseType_t xWaitForAllBits )
+{
+BaseType_t xWaitConditionMet = pdFALSE;
+
+	if( xWaitForAllBits == pdFALSE )
+	{
+		/* Task only has to wait for one bit within uxBitsToWaitFor to be
+		set.  Is one already set? */
+		if( ( uxCurrentEventBits & uxBitsToWaitFor ) != ( EventBits_t ) 0 )
+		{
+			xWaitConditionMet = pdTRUE;
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+	}
+	else
+	{
+		/* Task has to wait for all the bits in uxBitsToWaitFor to be set.
+		Are they set already? */
+		if( ( uxCurrentEventBits & uxBitsToWaitFor ) == uxBitsToWaitFor )
+		{
+			xWaitConditionMet = pdTRUE;
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+	}
+
+	return xWaitConditionMet;
+}
+/*-----------------------------------------------------------*/
+
+#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 1 ) && ( configUSE_TIMERS == 1 ) )
+
+	BaseType_t xEventGroupSetBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet, BaseType_t *pxHigherPriorityTaskWoken )
+	{
+	BaseType_t xReturn;
+
+		traceEVENT_GROUP_SET_BITS_FROM_ISR( xEventGroup, uxBitsToSet );
+		xReturn = xTimerPendFunctionCallFromISR( vEventGroupSetBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToSet, pxHigherPriorityTaskWoken );
+
+		return xReturn;
+	}
+
+#endif
+/*-----------------------------------------------------------*/
+
+#if (configUSE_TRACE_FACILITY == 1)
+
+	UBaseType_t uxEventGroupGetNumber( void* xEventGroup )
+	{
+	UBaseType_t xReturn;
+	EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
+
+		if( xEventGroup == NULL )
+		{
+			xReturn = 0;
+		}
+		else
+		{
+			xReturn = pxEventBits->uxEventGroupNumber;
+		}
+
+		return xReturn;
+	}
+
+#endif
+

Source/include/FreeRTOS.h

@@ -0,0 +1,835 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#ifndef INC_FREERTOS_H
+#define INC_FREERTOS_H
+
+/*
+ * Include the generic headers required for the FreeRTOS port being used.
+ */
+#include <stddef.h>
+
+/*
+ * If stdint.h cannot be located then:
+ *   + If using GCC ensure the -nostdint options is *not* being used.
+ *   + Ensure the project's include path includes the directory in which your
+ *     compiler stores stdint.h.
+ *   + Set any compiler options necessary for it to support C99, as technically
+ *     stdint.h is only mandatory with C99 (FreeRTOS does not require C99 in any
+ *     other way).
+ *   + The FreeRTOS download includes a simple stdint.h definition that can be
+ *     used in cases where none is provided by the compiler.  The files only
+ *     contains the typedefs required to build FreeRTOS.  Read the instructions
+ *     in FreeRTOS/source/stdint.readme for more information.
+ */
+#include <stdint.h> /* READ COMMENT ABOVE. */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Application specific configuration options. */
+#include "FreeRTOSConfig.h"
+
+/* Basic FreeRTOS definitions. */
+#include "projdefs.h"
+
+/* Definitions specific to the port being used. */
+#include "portable.h"
+
+/*
+ * Check all the required application specific macros have been defined.
+ * These macros are application specific and (as downloaded) are defined
+ * within FreeRTOSConfig.h.
+ */
+
+#ifndef configMINIMAL_STACK_SIZE
+	#error Missing definition:  configMINIMAL_STACK_SIZE must be defined in FreeRTOSConfig.h.  configMINIMAL_STACK_SIZE defines the size (in words) of the stack allocated to the idle task.  Refer to the demo project provided for your port for a suitable value.
+#endif
+
+#ifndef configMAX_PRIORITIES
+	#error Missing definition:  configMAX_PRIORITIES must be defined in FreeRTOSConfig.h.  See the Configuration section of the FreeRTOS API documentation for details.
+#endif
+
+#ifndef configUSE_PREEMPTION
+	#error Missing definition:  configUSE_PREEMPTION must be defined in FreeRTOSConfig.h as either 1 or 0.  See the Configuration section of the FreeRTOS API documentation for details.
+#endif
+
+#ifndef configUSE_IDLE_HOOK
+	#error Missing definition:  configUSE_IDLE_HOOK must be defined in FreeRTOSConfig.h as either 1 or 0.  See the Configuration section of the FreeRTOS API documentation for details.
+#endif
+
+#ifndef configUSE_TICK_HOOK
+	#error Missing definition:  configUSE_TICK_HOOK must be defined in FreeRTOSConfig.h as either 1 or 0.  See the Configuration section of the FreeRTOS API documentation for details.
+#endif
+
+#ifndef INCLUDE_vTaskPrioritySet
+	#error Missing definition:  INCLUDE_vTaskPrioritySet must be defined in FreeRTOSConfig.h as either 1 or 0.  See the Configuration section of the FreeRTOS API documentation for details.
+#endif
+
+#ifndef INCLUDE_uxTaskPriorityGet
+	#error Missing definition:  INCLUDE_uxTaskPriorityGet must be defined in FreeRTOSConfig.h as either 1 or 0.  See the Configuration section of the FreeRTOS API documentation for details.
+#endif
+
+#ifndef INCLUDE_vTaskDelete
+	#error Missing definition:  INCLUDE_vTaskDelete must be defined in FreeRTOSConfig.h as either 1 or 0.  See the Configuration section of the FreeRTOS API documentation for details.
+#endif
+
+#ifndef INCLUDE_vTaskSuspend
+	#error Missing definition:  INCLUDE_vTaskSuspend must be defined in FreeRTOSConfig.h as either 1 or 0.  See the Configuration section of the FreeRTOS API documentation for details.
+#endif
+
+#ifndef INCLUDE_vTaskDelayUntil
+	#error Missing definition:  INCLUDE_vTaskDelayUntil must be defined in FreeRTOSConfig.h as either 1 or 0.  See the Configuration section of the FreeRTOS API documentation for details.
+#endif
+
+#ifndef INCLUDE_vTaskDelay
+	#error Missing definition:  INCLUDE_vTaskDelay must be defined in FreeRTOSConfig.h as either 1 or 0.  See the Configuration section of the FreeRTOS API documentation for details.
+#endif
+
+#ifndef configUSE_16_BIT_TICKS
+	#error Missing definition:  configUSE_16_BIT_TICKS must be defined in FreeRTOSConfig.h as either 1 or 0.  See the Configuration section of the FreeRTOS API documentation for details.
+#endif
+
+#ifndef configMAX_PRIORITIES
+	#error configMAX_PRIORITIES must be defined to be greater than or equal to 1.
+#endif
+
+#ifndef configUSE_CO_ROUTINES
+	#define configUSE_CO_ROUTINES 0
+#endif
+
+#if configUSE_CO_ROUTINES != 0
+	#ifndef configMAX_CO_ROUTINE_PRIORITIES
+		#error configMAX_CO_ROUTINE_PRIORITIES must be greater than or equal to 1.
+	#endif
+#endif
+
+#ifndef INCLUDE_xTaskGetIdleTaskHandle
+	#define INCLUDE_xTaskGetIdleTaskHandle 0
+#endif
+
+#ifndef INCLUDE_xTimerGetTimerDaemonTaskHandle
+	#define INCLUDE_xTimerGetTimerDaemonTaskHandle 0
+#endif
+
+#ifndef INCLUDE_xQueueGetMutexHolder
+	#define INCLUDE_xQueueGetMutexHolder 0
+#endif
+
+#ifndef INCLUDE_xSemaphoreGetMutexHolder
+	#define INCLUDE_xSemaphoreGetMutexHolder INCLUDE_xQueueGetMutexHolder
+#endif
+
+#ifndef INCLUDE_pcTaskGetTaskName
+	#define INCLUDE_pcTaskGetTaskName 0
+#endif
+
+#ifndef configUSE_APPLICATION_TASK_TAG
+	#define configUSE_APPLICATION_TASK_TAG 0
+#endif
+
+#ifndef configNUM_THREAD_LOCAL_STORAGE_POINTERS
+	#define configNUM_THREAD_LOCAL_STORAGE_POINTERS 0
+#endif
+
+#ifndef INCLUDE_uxTaskGetStackHighWaterMark
+	#define INCLUDE_uxTaskGetStackHighWaterMark 0
+#endif
+
+#ifndef INCLUDE_eTaskGetState
+	#define INCLUDE_eTaskGetState 0
+#endif
+
+#ifndef configUSE_RECURSIVE_MUTEXES
+	#define configUSE_RECURSIVE_MUTEXES 0
+#endif
+
+#ifndef configUSE_MUTEXES
+	#define configUSE_MUTEXES 0
+#endif
+
+#ifndef configUSE_TIMERS
+	#define configUSE_TIMERS 0
+#endif
+
+#ifndef configUSE_COUNTING_SEMAPHORES
+	#define configUSE_COUNTING_SEMAPHORES 0
+#endif
+
+#ifndef configUSE_ALTERNATIVE_API
+	#define configUSE_ALTERNATIVE_API 0
+#endif
+
+#ifndef portCRITICAL_NESTING_IN_TCB
+	#define portCRITICAL_NESTING_IN_TCB 0
+#endif
+
+#ifndef configMAX_TASK_NAME_LEN
+	#define configMAX_TASK_NAME_LEN 16
+#endif
+
+#ifndef configIDLE_SHOULD_YIELD
+	#define configIDLE_SHOULD_YIELD		1
+#endif
+
+#if configMAX_TASK_NAME_LEN < 1
+	#error configMAX_TASK_NAME_LEN must be set to a minimum of 1 in FreeRTOSConfig.h
+#endif
+
+#ifndef INCLUDE_xTaskResumeFromISR
+	#define INCLUDE_xTaskResumeFromISR 1
+#endif
+
+#ifndef INCLUDE_xEventGroupSetBitFromISR
+	#define INCLUDE_xEventGroupSetBitFromISR 0
+#endif
+
+#ifndef INCLUDE_xTimerPendFunctionCall
+	#define INCLUDE_xTimerPendFunctionCall 0
+#endif
+
+#ifndef configASSERT
+	#define configASSERT( x )
+	#define configASSERT_DEFINED 0
+#else
+	#define configASSERT_DEFINED 1
+#endif
+
+/* The timers module relies on xTaskGetSchedulerState(). */
+#if configUSE_TIMERS == 1
+
+	#ifndef configTIMER_TASK_PRIORITY
+		#error If configUSE_TIMERS is set to 1 then configTIMER_TASK_PRIORITY must also be defined.
+	#endif /* configTIMER_TASK_PRIORITY */
+
+	#ifndef configTIMER_QUEUE_LENGTH
+		#error If configUSE_TIMERS is set to 1 then configTIMER_QUEUE_LENGTH must also be defined.
+	#endif /* configTIMER_QUEUE_LENGTH */
+
+	#ifndef configTIMER_TASK_STACK_DEPTH
+		#error If configUSE_TIMERS is set to 1 then configTIMER_TASK_STACK_DEPTH must also be defined.
+	#endif /* configTIMER_TASK_STACK_DEPTH */
+
+#endif /* configUSE_TIMERS */
+
+#ifndef INCLUDE_xTaskGetSchedulerState
+	#define INCLUDE_xTaskGetSchedulerState 0
+#endif
+
+#ifndef INCLUDE_xTaskGetCurrentTaskHandle
+	#define INCLUDE_xTaskGetCurrentTaskHandle 0
+#endif
+
+
+#ifndef portSET_INTERRUPT_MASK_FROM_ISR
+	#define portSET_INTERRUPT_MASK_FROM_ISR() 0
+#endif
+
+#ifndef portCLEAR_INTERRUPT_MASK_FROM_ISR
+	#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusValue ) ( void ) uxSavedStatusValue
+#endif
+
+#ifndef portCLEAN_UP_TCB
+	#define portCLEAN_UP_TCB( pxTCB ) ( void ) pxTCB
+#endif
+
+#ifndef portPRE_TASK_DELETE_HOOK
+	#define portPRE_TASK_DELETE_HOOK( pvTaskToDelete, pxYieldPending )
+#endif
+
+#ifndef portSETUP_TCB
+	#define portSETUP_TCB( pxTCB ) ( void ) pxTCB
+#endif
+
+#ifndef configQUEUE_REGISTRY_SIZE
+	#define configQUEUE_REGISTRY_SIZE 0U
+#endif
+
+#if ( configQUEUE_REGISTRY_SIZE < 1 )
+	#define vQueueAddToRegistry( xQueue, pcName )
+	#define vQueueUnregisterQueue( xQueue )
+#endif
+
+#ifndef portPOINTER_SIZE_TYPE
+	#define portPOINTER_SIZE_TYPE uint32_t
+#endif
+
+/* Remove any unused trace macros. */
+#ifndef traceSTART
+	/* Used to perform any necessary initialisation - for example, open a file
+	into which trace is to be written. */
+	#define traceSTART()
+#endif
+
+#ifndef traceEND
+	/* Use to close a trace, for example close a file into which trace has been
+	written. */
+	#define traceEND()
+#endif
+
+#ifndef traceTASK_SWITCHED_IN
+	/* Called after a task has been selected to run.  pxCurrentTCB holds a pointer
+	to the task control block of the selected task. */
+	#define traceTASK_SWITCHED_IN()
+#endif
+
+#ifndef traceINCREASE_TICK_COUNT
+	/* Called before stepping the tick count after waking from tickless idle
+	sleep. */
+	#define traceINCREASE_TICK_COUNT( x )
+#endif
+
+#ifndef traceLOW_POWER_IDLE_BEGIN
+	/* Called immediately before entering tickless idle. */
+	#define traceLOW_POWER_IDLE_BEGIN()
+#endif
+
+#ifndef	traceLOW_POWER_IDLE_END
+	/* Called when returning to the Idle task after a tickless idle. */
+	#define traceLOW_POWER_IDLE_END()
+#endif
+
+#ifndef traceTASK_SWITCHED_OUT
+	/* Called before a task has been selected to run.  pxCurrentTCB holds a pointer
+	to the task control block of the task being switched out. */
+	#define traceTASK_SWITCHED_OUT()
+#endif
+
+#ifndef traceTASK_PRIORITY_INHERIT
+	/* Called when a task attempts to take a mutex that is already held by a
+	lower priority task.  pxTCBOfMutexHolder is a pointer to the TCB of the task
+	that holds the mutex.  uxInheritedPriority is the priority the mutex holder
+	will inherit (the priority of the task that is attempting to obtain the
+	muted. */
+	#define traceTASK_PRIORITY_INHERIT( pxTCBOfMutexHolder, uxInheritedPriority )
+#endif
+
+#ifndef traceTASK_PRIORITY_DISINHERIT
+	/* Called when a task releases a mutex, the holding of which had resulted in
+	the task inheriting the priority of a higher priority task.
+	pxTCBOfMutexHolder is a pointer to the TCB of the task that is releasing the
+	mutex.  uxOriginalPriority is the task's configured (base) priority. */
+	#define traceTASK_PRIORITY_DISINHERIT( pxTCBOfMutexHolder, uxOriginalPriority )
+#endif
+
+#ifndef traceBLOCKING_ON_QUEUE_RECEIVE
+	/* Task is about to block because it cannot read from a
+	queue/mutex/semaphore.  pxQueue is a pointer to the queue/mutex/semaphore
+	upon which the read was attempted.  pxCurrentTCB points to the TCB of the
+	task that attempted the read. */
+	#define traceBLOCKING_ON_QUEUE_RECEIVE( pxQueue )
+#endif
+
+#ifndef traceBLOCKING_ON_QUEUE_SEND
+	/* Task is about to block because it cannot write to a
+	queue/mutex/semaphore.  pxQueue is a pointer to the queue/mutex/semaphore
+	upon which the write was attempted.  pxCurrentTCB points to the TCB of the
+	task that attempted the write. */
+	#define traceBLOCKING_ON_QUEUE_SEND( pxQueue )
+#endif
+
+#ifndef configCHECK_FOR_STACK_OVERFLOW
+	#define configCHECK_FOR_STACK_OVERFLOW 0
+#endif
+
+/* The following event macros are embedded in the kernel API calls. */
+
+#ifndef traceMOVED_TASK_TO_READY_STATE
+	#define traceMOVED_TASK_TO_READY_STATE( pxTCB )
+#endif
+
+#ifndef traceQUEUE_CREATE
+	#define traceQUEUE_CREATE( pxNewQueue )
+#endif
+
+#ifndef traceQUEUE_CREATE_FAILED
+	#define traceQUEUE_CREATE_FAILED( ucQueueType )
+#endif
+
+#ifndef traceCREATE_MUTEX
+	#define traceCREATE_MUTEX( pxNewQueue )
+#endif
+
+#ifndef traceCREATE_MUTEX_FAILED
+	#define traceCREATE_MUTEX_FAILED()
+#endif
+
+#ifndef traceGIVE_MUTEX_RECURSIVE
+	#define traceGIVE_MUTEX_RECURSIVE( pxMutex )
+#endif
+
+#ifndef traceGIVE_MUTEX_RECURSIVE_FAILED
+	#define traceGIVE_MUTEX_RECURSIVE_FAILED( pxMutex )
+#endif
+
+#ifndef traceTAKE_MUTEX_RECURSIVE
+	#define traceTAKE_MUTEX_RECURSIVE( pxMutex )
+#endif
+
+#ifndef traceTAKE_MUTEX_RECURSIVE_FAILED
+	#define traceTAKE_MUTEX_RECURSIVE_FAILED( pxMutex )
+#endif
+
+#ifndef traceCREATE_COUNTING_SEMAPHORE
+	#define traceCREATE_COUNTING_SEMAPHORE()
+#endif
+
+#ifndef traceCREATE_COUNTING_SEMAPHORE_FAILED
+	#define traceCREATE_COUNTING_SEMAPHORE_FAILED()
+#endif
+
+#ifndef traceQUEUE_SEND
+	#define traceQUEUE_SEND( pxQueue )
+#endif
+
+#ifndef traceQUEUE_SEND_FAILED
+	#define traceQUEUE_SEND_FAILED( pxQueue )
+#endif
+
+#ifndef traceQUEUE_RECEIVE
+	#define traceQUEUE_RECEIVE( pxQueue )
+#endif
+
+#ifndef traceQUEUE_PEEK
+	#define traceQUEUE_PEEK( pxQueue )
+#endif
+
+#ifndef traceQUEUE_PEEK_FROM_ISR
+	#define traceQUEUE_PEEK_FROM_ISR( pxQueue )
+#endif
+
+#ifndef traceQUEUE_RECEIVE_FAILED
+	#define traceQUEUE_RECEIVE_FAILED( pxQueue )
+#endif
+
+#ifndef traceQUEUE_SEND_FROM_ISR
+	#define traceQUEUE_SEND_FROM_ISR( pxQueue )
+#endif
+
+#ifndef traceQUEUE_SEND_FROM_ISR_FAILED
+	#define traceQUEUE_SEND_FROM_ISR_FAILED( pxQueue )
+#endif
+
+#ifndef traceQUEUE_RECEIVE_FROM_ISR
+	#define traceQUEUE_RECEIVE_FROM_ISR( pxQueue )
+#endif
+
+#ifndef traceQUEUE_RECEIVE_FROM_ISR_FAILED
+	#define traceQUEUE_RECEIVE_FROM_ISR_FAILED( pxQueue )
+#endif
+
+#ifndef traceQUEUE_PEEK_FROM_ISR_FAILED
+	#define traceQUEUE_PEEK_FROM_ISR_FAILED( pxQueue )
+#endif
+
+#ifndef traceQUEUE_DELETE
+	#define traceQUEUE_DELETE( pxQueue )
+#endif
+
+#ifndef traceTASK_CREATE
+	#define traceTASK_CREATE( pxNewTCB )
+#endif
+
+#ifndef traceTASK_CREATE_FAILED
+	#define traceTASK_CREATE_FAILED()
+#endif
+
+#ifndef traceTASK_DELETE
+	#define traceTASK_DELETE( pxTaskToDelete )
+#endif
+
+#ifndef traceTASK_DELAY_UNTIL
+	#define traceTASK_DELAY_UNTIL()
+#endif
+
+#ifndef traceTASK_DELAY
+	#define traceTASK_DELAY()
+#endif
+
+#ifndef traceTASK_PRIORITY_SET
+	#define traceTASK_PRIORITY_SET( pxTask, uxNewPriority )
+#endif
+
+#ifndef traceTASK_SUSPEND
+	#define traceTASK_SUSPEND( pxTaskToSuspend )
+#endif
+
+#ifndef traceTASK_RESUME
+	#define traceTASK_RESUME( pxTaskToResume )
+#endif
+
+#ifndef traceTASK_RESUME_FROM_ISR
+	#define traceTASK_RESUME_FROM_ISR( pxTaskToResume )
+#endif
+
+#ifndef traceTASK_INCREMENT_TICK
+	#define traceTASK_INCREMENT_TICK( xTickCount )
+#endif
+
+#ifndef traceTIMER_CREATE
+	#define traceTIMER_CREATE( pxNewTimer )
+#endif
+
+#ifndef traceTIMER_CREATE_FAILED
+	#define traceTIMER_CREATE_FAILED()
+#endif
+
+#ifndef traceTIMER_COMMAND_SEND
+	#define traceTIMER_COMMAND_SEND( xTimer, xMessageID, xMessageValueValue, xReturn )
+#endif
+
+#ifndef traceTIMER_EXPIRED
+	#define traceTIMER_EXPIRED( pxTimer )
+#endif
+
+#ifndef traceTIMER_COMMAND_RECEIVED
+	#define traceTIMER_COMMAND_RECEIVED( pxTimer, xMessageID, xMessageValue )
+#endif
+
+#ifndef traceMALLOC
+    #define traceMALLOC( pvAddress, uiSize )
+#endif
+
+#ifndef traceFREE
+    #define traceFREE( pvAddress, uiSize )
+#endif
+
+#ifndef traceEVENT_GROUP_CREATE
+	#define traceEVENT_GROUP_CREATE( xEventGroup )
+#endif
+
+#ifndef traceEVENT_GROUP_CREATE_FAILED
+	#define traceEVENT_GROUP_CREATE_FAILED()
+#endif
+
+#ifndef traceEVENT_GROUP_SYNC_BLOCK
+	#define traceEVENT_GROUP_SYNC_BLOCK( xEventGroup, uxBitsToSet, uxBitsToWaitFor )
+#endif
+
+#ifndef traceEVENT_GROUP_SYNC_END
+	#define traceEVENT_GROUP_SYNC_END( xEventGroup, uxBitsToSet, uxBitsToWaitFor, xTimeoutOccurred ) ( void ) xTimeoutOccurred
+#endif
+
+#ifndef traceEVENT_GROUP_WAIT_BITS_BLOCK
+	#define traceEVENT_GROUP_WAIT_BITS_BLOCK( xEventGroup, uxBitsToWaitFor )
+#endif
+
+#ifndef traceEVENT_GROUP_WAIT_BITS_END
+	#define traceEVENT_GROUP_WAIT_BITS_END( xEventGroup, uxBitsToWaitFor, xTimeoutOccurred ) ( void ) xTimeoutOccurred
+#endif
+
+#ifndef traceEVENT_GROUP_CLEAR_BITS
+	#define traceEVENT_GROUP_CLEAR_BITS( xEventGroup, uxBitsToClear )
+#endif
+
+#ifndef traceEVENT_GROUP_CLEAR_BITS_FROM_ISR
+	#define traceEVENT_GROUP_CLEAR_BITS_FROM_ISR( xEventGroup, uxBitsToClear )
+#endif
+
+#ifndef traceEVENT_GROUP_SET_BITS
+	#define traceEVENT_GROUP_SET_BITS( xEventGroup, uxBitsToSet )
+#endif
+
+#ifndef traceEVENT_GROUP_SET_BITS_FROM_ISR
+	#define traceEVENT_GROUP_SET_BITS_FROM_ISR( xEventGroup, uxBitsToSet )
+#endif
+
+#ifndef traceEVENT_GROUP_DELETE
+	#define traceEVENT_GROUP_DELETE( xEventGroup )
+#endif
+
+#ifndef tracePEND_FUNC_CALL
+	#define tracePEND_FUNC_CALL(xFunctionToPend, pvParameter1, ulParameter2, ret)
+#endif
+
+#ifndef tracePEND_FUNC_CALL_FROM_ISR
+	#define tracePEND_FUNC_CALL_FROM_ISR(xFunctionToPend, pvParameter1, ulParameter2, ret)
+#endif
+
+#ifndef traceQUEUE_REGISTRY_ADD
+	#define traceQUEUE_REGISTRY_ADD(xQueue, pcQueueName)
+#endif
+
+#ifndef traceTASK_NOTIFY_TAKE_BLOCK
+	#define traceTASK_NOTIFY_TAKE_BLOCK()
+#endif
+
+#ifndef traceTASK_NOTIFY_TAKE
+	#define traceTASK_NOTIFY_TAKE()
+#endif
+
+#ifndef traceTASK_NOTIFY_WAIT_BLOCK
+	#define traceTASK_NOTIFY_WAIT_BLOCK()
+#endif
+
+#ifndef traceTASK_NOTIFY_WAIT
+	#define traceTASK_NOTIFY_WAIT()
+#endif
+
+#ifndef traceTASK_NOTIFY
+	#define traceTASK_NOTIFY()
+#endif
+
+#ifndef traceTASK_NOTIFY_FROM_ISR
+	#define traceTASK_NOTIFY_FROM_ISR()
+#endif
+
+#ifndef traceTASK_NOTIFY_GIVE_FROM_ISR
+	#define traceTASK_NOTIFY_GIVE_FROM_ISR()
+#endif
+
+#ifndef configGENERATE_RUN_TIME_STATS
+	#define configGENERATE_RUN_TIME_STATS 0
+#endif
+
+#if ( configGENERATE_RUN_TIME_STATS == 1 )
+
+	#ifndef portCONFIGURE_TIMER_FOR_RUN_TIME_STATS
+		#error If configGENERATE_RUN_TIME_STATS is defined then portCONFIGURE_TIMER_FOR_RUN_TIME_STATS must also be defined.  portCONFIGURE_TIMER_FOR_RUN_TIME_STATS should call a port layer function to setup a peripheral timer/counter that can then be used as the run time counter time base.
+	#endif /* portCONFIGURE_TIMER_FOR_RUN_TIME_STATS */
+
+	#ifndef portGET_RUN_TIME_COUNTER_VALUE
+		#ifndef portALT_GET_RUN_TIME_COUNTER_VALUE
+			#error If configGENERATE_RUN_TIME_STATS is defined then either portGET_RUN_TIME_COUNTER_VALUE or portALT_GET_RUN_TIME_COUNTER_VALUE must also be defined.  See the examples provided and the FreeRTOS web site for more information.
+		#endif /* portALT_GET_RUN_TIME_COUNTER_VALUE */
+	#endif /* portGET_RUN_TIME_COUNTER_VALUE */
+
+#endif /* configGENERATE_RUN_TIME_STATS */
+
+#ifndef portCONFIGURE_TIMER_FOR_RUN_TIME_STATS
+	#define portCONFIGURE_TIMER_FOR_RUN_TIME_STATS()
+#endif
+
+#ifndef configUSE_MALLOC_FAILED_HOOK
+	#define configUSE_MALLOC_FAILED_HOOK 0
+#endif
+
+#ifndef portPRIVILEGE_BIT
+	#define portPRIVILEGE_BIT ( ( UBaseType_t ) 0x00 )
+#endif
+
+#ifndef portYIELD_WITHIN_API
+	#define portYIELD_WITHIN_API portYIELD
+#endif
+
+#ifndef pvPortMallocAligned
+	#define pvPortMallocAligned( x, puxStackBuffer ) ( ( ( puxStackBuffer ) == NULL ) ? ( pvPortMalloc( ( x ) ) ) : ( puxStackBuffer ) )
+#endif
+
+#ifndef vPortFreeAligned
+	#define vPortFreeAligned( pvBlockToFree ) vPortFree( pvBlockToFree )
+#endif
+
+#ifndef portSUPPRESS_TICKS_AND_SLEEP
+	#define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime )
+#endif
+
+#ifndef configEXPECTED_IDLE_TIME_BEFORE_SLEEP
+	#define configEXPECTED_IDLE_TIME_BEFORE_SLEEP 2
+#endif
+
+#if configEXPECTED_IDLE_TIME_BEFORE_SLEEP < 2
+	#error configEXPECTED_IDLE_TIME_BEFORE_SLEEP must not be less than 2
+#endif
+
+#ifndef configUSE_TICKLESS_IDLE
+	#define configUSE_TICKLESS_IDLE 0
+#endif
+
+#ifndef configPRE_SLEEP_PROCESSING
+	#define configPRE_SLEEP_PROCESSING( x )
+#endif
+
+#ifndef configPOST_SLEEP_PROCESSING
+	#define configPOST_SLEEP_PROCESSING( x )
+#endif
+
+#ifndef configUSE_QUEUE_SETS
+	#define configUSE_QUEUE_SETS 0
+#endif
+
+#ifndef portTASK_USES_FLOATING_POINT
+	#define portTASK_USES_FLOATING_POINT()
+#endif
+
+#ifndef configUSE_TIME_SLICING
+	#define configUSE_TIME_SLICING 1
+#endif
+
+#ifndef configINCLUDE_APPLICATION_DEFINED_PRIVILEGED_FUNCTIONS
+	#define configINCLUDE_APPLICATION_DEFINED_PRIVILEGED_FUNCTIONS 0
+#endif
+
+#ifndef configUSE_NEWLIB_REENTRANT
+	#define configUSE_NEWLIB_REENTRANT 0
+#endif
+
+#ifndef configUSE_STATS_FORMATTING_FUNCTIONS
+	#define configUSE_STATS_FORMATTING_FUNCTIONS 0
+#endif
+
+#ifndef portASSERT_IF_INTERRUPT_PRIORITY_INVALID
+	#define portASSERT_IF_INTERRUPT_PRIORITY_INVALID()
+#endif
+
+#ifndef configUSE_TRACE_FACILITY
+	#define configUSE_TRACE_FACILITY 0
+#endif
+
+#ifndef mtCOVERAGE_TEST_MARKER
+	#define mtCOVERAGE_TEST_MARKER()
+#endif
+
+#ifndef mtCOVERAGE_TEST_DELAY
+	#define mtCOVERAGE_TEST_DELAY()
+#endif
+
+#ifndef portASSERT_IF_IN_ISR
+	#define portASSERT_IF_IN_ISR()
+#endif
+
+#ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
+	#define configUSE_PORT_OPTIMISED_TASK_SELECTION 0
+#endif
+
+#ifndef configAPPLICATION_ALLOCATED_HEAP
+	#define configAPPLICATION_ALLOCATED_HEAP 0
+#endif
+
+#ifndef configUSE_TASK_NOTIFICATIONS
+	#define configUSE_TASK_NOTIFICATIONS 1
+#endif
+
+#ifndef portTICK_TYPE_IS_ATOMIC
+	#define portTICK_TYPE_IS_ATOMIC 0
+#endif
+
+#if( portTICK_TYPE_IS_ATOMIC == 0 )
+	/* Either variables of tick type cannot be read atomically, or
+	portTICK_TYPE_IS_ATOMIC was not set - map the critical sections used when
+	the tick count is returned to the standard critical section macros. */
+	#define portTICK_TYPE_ENTER_CRITICAL() portENTER_CRITICAL()
+	#define portTICK_TYPE_EXIT_CRITICAL() portEXIT_CRITICAL()
+	#define portTICK_TYPE_SET_INTERRUPT_MASK_FROM_ISR() portSET_INTERRUPT_MASK_FROM_ISR()
+	#define portTICK_TYPE_CLEAR_INTERRUPT_MASK_FROM_ISR( x ) portCLEAR_INTERRUPT_MASK_FROM_ISR( ( x ) )
+#else
+	/* The tick type can be read atomically, so critical sections used when the
+	tick count is returned can be defined away. */
+	#define portTICK_TYPE_ENTER_CRITICAL()
+	#define portTICK_TYPE_EXIT_CRITICAL()
+	#define portTICK_TYPE_SET_INTERRUPT_MASK_FROM_ISR() 0
+	#define portTICK_TYPE_CLEAR_INTERRUPT_MASK_FROM_ISR( x ) ( void ) x
+#endif
+
+/* Definitions to allow backward compatibility with FreeRTOS versions prior to
+V8 if desired. */
+#ifndef configENABLE_BACKWARD_COMPATIBILITY
+	#define configENABLE_BACKWARD_COMPATIBILITY 1
+#endif
+
+#if configENABLE_BACKWARD_COMPATIBILITY == 1
+	#define eTaskStateGet eTaskGetState
+	#define portTickType TickType_t
+	#define xTaskHandle TaskHandle_t
+	#define xQueueHandle QueueHandle_t
+	#define xSemaphoreHandle SemaphoreHandle_t
+	#define xQueueSetHandle QueueSetHandle_t
+	#define xQueueSetMemberHandle QueueSetMemberHandle_t
+	#define xTimeOutType TimeOut_t
+	#define xMemoryRegion MemoryRegion_t
+	#define xTaskParameters TaskParameters_t
+	#define xTaskStatusType	TaskStatus_t
+	#define xTimerHandle TimerHandle_t
+	#define xCoRoutineHandle CoRoutineHandle_t
+	#define pdTASK_HOOK_CODE TaskHookFunction_t
+	#define portTICK_RATE_MS portTICK_PERIOD_MS
+
+	/* Backward compatibility within the scheduler code only - these definitions
+	are not really required but are included for completeness. */
+	#define tmrTIMER_CALLBACK TimerCallbackFunction_t
+	#define pdTASK_CODE TaskFunction_t
+	#define xListItem ListItem_t
+	#define xList List_t
+#endif /* configENABLE_BACKWARD_COMPATIBILITY */
+
+/* Set configUSE_TASK_FPU_SUPPORT to 0 to omit floating point support even
+if floating point hardware is otherwise supported by the FreeRTOS port in use.
+This constant is not supported by all FreeRTOS ports that include floating 
+point support. */
+#ifndef configUSE_TASK_FPU_SUPPORT
+	#define configUSE_TASK_FPU_SUPPORT 1
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* INC_FREERTOS_H */
+

Source/include/FreeRTOSConfig.h

@@ -0,0 +1,144 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+
+#ifndef FREERTOS_CONFIG_H
+#define FREERTOS_CONFIG_H
+
+
+/*-----------------------------------------------------------
+ * Application specific definitions.
+ *
+ * These definitions should be adjusted for your particular hardware and
+ * application requirements.
+ *
+ * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
+ * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
+ *
+ * See http://www.freertos.org/a00110.html.
+ *----------------------------------------------------------*/
+
+#include <stdint.h>
+#include "portmacro.h"
+extern uint32_t SystemCoreClock;
+
+#define configUSE_PREEMPTION			1
+#define configUSE_IDLE_HOOK				0
+#define configUSE_TICK_HOOK				0
+#define configCPU_CLOCK_HZ			( ( unsigned long ) 4000000 )
+#define configTICK_CLOCK_HZ			( ( unsigned long ) 4000000 )
+#define configTICK_RATE_HZ			( ( TickType_t ) 1000)
+#define configMAX_PRIORITIES		( 10 )
+#define configMINIMAL_STACK_SIZE	( ( unsigned short ) 1024 )
+#define configTOTAL_HEAP_SIZE		( ( size_t ) ( 100 * 1024 ) )
+#define configMAX_TASK_NAME_LEN			( 16 )
+#define configUSE_TRACE_FACILITY		1
+#define configUSE_16_BIT_TICKS			0
+#define configIDLE_SHOULD_YIELD			1
+#define configUSE_MUTEXES				1
+#define configQUEUE_REGISTRY_SIZE		8
+#define configCHECK_FOR_STACK_OVERFLOW	2
+#define configUSE_RECURSIVE_MUTEXES		1
+#define configUSE_MALLOC_FAILED_HOOK	1
+#define configUSE_APPLICATION_TASK_TAG	0
+#define configUSE_COUNTING_SEMAPHORES	1
+#define configGENERATE_RUN_TIME_STATS	0
+
+/* Co-routine definitions. */
+#define configUSE_CO_ROUTINES 			0
+#define configMAX_CO_ROUTINE_PRIORITIES ( 2 )
+
+/* Software timer definitions. */
+#define configUSE_TIMERS				1
+#define configTIMER_TASK_PRIORITY		( 2 )
+#define configTIMER_QUEUE_LENGTH		4
+#define configTIMER_TASK_STACK_DEPTH	( configMINIMAL_STACK_SIZE )
+
+/* Set the following definitions to 1 to include the API function, or zero
+to exclude the API function. */
+#define INCLUDE_vTaskPrioritySet		1
+#define INCLUDE_uxTaskPriorityGet		1
+#define INCLUDE_vTaskDelete				1
+#define INCLUDE_vTaskCleanUpResources	1
+#define INCLUDE_vTaskSuspend			1
+#define INCLUDE_vTaskDelayUntil			1
+#define INCLUDE_vTaskDelay				1
+#define INCLUDE_eTaskGetState			1
+
+/* Normal assert() semantics without relying on the provision of an assert.h
+header file. */
+#define configASSERT( x ) if( ( x ) == 0 ) { taskDISABLE_INTERRUPTS(); for( ;; ); }
+
+/* Definitions that map the FreeRTOS port interrupt handlers to their CMSIS
+standard names - or at least those used in the unmodified vector table. */
+#define vPortSVCHandler SVCall_Handler
+#define xPortPendSVHandler PendSV_Handler
+#define xPortSysTickHandler SysTick_Handler
+
+#endif /* FREERTOS_CONFIG_H */

Source/include/StackMacros.h

@@ -0,0 +1,171 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#ifndef STACK_MACROS_H
+#define STACK_MACROS_H
+
+/*
+ * Call the stack overflow hook function if the stack of the task being swapped
+ * out is currently overflowed, or looks like it might have overflowed in the
+ * past.
+ *
+ * Setting configCHECK_FOR_STACK_OVERFLOW to 1 will cause the macro to check
+ * the current stack state only - comparing the current top of stack value to
+ * the stack limit.  Setting configCHECK_FOR_STACK_OVERFLOW to greater than 1
+ * will also cause the last few stack bytes to be checked to ensure the value
+ * to which the bytes were set when the task was created have not been
+ * overwritten.  Note this second test does not guarantee that an overflowed
+ * stack will always be recognised.
+ */
+
+/*-----------------------------------------------------------*/
+
+#if( ( configCHECK_FOR_STACK_OVERFLOW == 1 ) && ( portSTACK_GROWTH < 0 ) )
+
+	/* Only the current stack state is to be checked. */
+	#define taskCHECK_FOR_STACK_OVERFLOW()																\
+	{																									\
+		/* Is the currently saved stack pointer within the stack limit? */								\
+		if( pxCurrentTCB->pxTopOfStack <= pxCurrentTCB->pxStack )										\
+		{																								\
+			vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName );	\
+		}																								\
+	}
+
+#endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */
+/*-----------------------------------------------------------*/
+
+#if( ( configCHECK_FOR_STACK_OVERFLOW == 1 ) && ( portSTACK_GROWTH > 0 ) )
+
+	/* Only the current stack state is to be checked. */
+	#define taskCHECK_FOR_STACK_OVERFLOW()																\
+	{																									\
+																										\
+		/* Is the currently saved stack pointer within the stack limit? */								\
+		if( pxCurrentTCB->pxTopOfStack >= pxCurrentTCB->pxEndOfStack )									\
+		{																								\
+			vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName );	\
+		}																								\
+	}
+
+#endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */
+/*-----------------------------------------------------------*/
+
+#if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH < 0 ) )
+
+	#define taskCHECK_FOR_STACK_OVERFLOW()																\
+	{																									\
+		const uint32_t * const pulStack = ( uint32_t * ) pxCurrentTCB->pxStack;							\
+		const uint32_t ulCheckValue = ( uint32_t ) 0xa5a5a5a5;											\
+																										\
+		if( ( pulStack[ 0 ] != ulCheckValue ) ||												\
+			( pulStack[ 1 ] != ulCheckValue ) ||												\
+			( pulStack[ 2 ] != ulCheckValue ) ||												\
+			( pulStack[ 3 ] != ulCheckValue ) )												\
+		{																								\
+			vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName );	\
+		}																								\
+	}
+
+#endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */
+/*-----------------------------------------------------------*/
+
+#if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH > 0 ) )
+
+	#define taskCHECK_FOR_STACK_OVERFLOW()																								\
+	{																																	\
+	int8_t *pcEndOfStack = ( int8_t * ) pxCurrentTCB->pxEndOfStack;																		\
+	static const uint8_t ucExpectedStackBytes[] = {	tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,		\
+													tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,		\
+													tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,		\
+													tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,		\
+													tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE };	\
+																																		\
+																																		\
+		pcEndOfStack -= sizeof( ucExpectedStackBytes );																					\
+																																		\
+		/* Has the extremity of the task stack ever been written over? */																\
+		if( memcmp( ( void * ) pcEndOfStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) != 0 )					\
+		{																																\
+			vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName );									\
+		}																																\
+	}
+
+#endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */
+/*-----------------------------------------------------------*/
+
+/* Remove stack overflow macro if not being used. */
+#ifndef taskCHECK_FOR_STACK_OVERFLOW
+	#define taskCHECK_FOR_STACK_OVERFLOW()
+#endif
+
+
+
+#endif /* STACK_MACROS_H */
+

Source/include/croutine.h

@@ -0,0 +1,762 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#ifndef CO_ROUTINE_H
+#define CO_ROUTINE_H
+
+#ifndef INC_FREERTOS_H
+	#error "include FreeRTOS.h must appear in source files before include croutine.h"
+#endif
+
+#include "list.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Used to hide the implementation of the co-routine control block.  The
+control block structure however has to be included in the header due to
+the macro implementation of the co-routine functionality. */
+typedef void * CoRoutineHandle_t;
+
+/* Defines the prototype to which co-routine functions must conform. */
+typedef void (*crCOROUTINE_CODE)( CoRoutineHandle_t, UBaseType_t );
+
+typedef struct corCoRoutineControlBlock
+{
+	crCOROUTINE_CODE 	pxCoRoutineFunction;
+	ListItem_t			xGenericListItem;	/*< List item used to place the CRCB in ready and blocked queues. */
+	ListItem_t			xEventListItem;		/*< List item used to place the CRCB in event lists. */
+	UBaseType_t 		uxPriority;			/*< The priority of the co-routine in relation to other co-routines. */
+	UBaseType_t 		uxIndex;			/*< Used to distinguish between co-routines when multiple co-routines use the same co-routine function. */
+	uint16_t 			uxState;			/*< Used internally by the co-routine implementation. */
+} CRCB_t; /* Co-routine control block.  Note must be identical in size down to uxPriority with TCB_t. */
+
+/**
+ * croutine. h
+ *<pre>
+ BaseType_t xCoRoutineCreate(
+                                 crCOROUTINE_CODE pxCoRoutineCode,
+                                 UBaseType_t uxPriority,
+                                 UBaseType_t uxIndex
+                               );</pre>
+ *
+ * Create a new co-routine and add it to the list of co-routines that are
+ * ready to run.
+ *
+ * @param pxCoRoutineCode Pointer to the co-routine function.  Co-routine
+ * functions require special syntax - see the co-routine section of the WEB
+ * documentation for more information.
+ *
+ * @param uxPriority The priority with respect to other co-routines at which
+ *  the co-routine will run.
+ *
+ * @param uxIndex Used to distinguish between different co-routines that
+ * execute the same function.  See the example below and the co-routine section
+ * of the WEB documentation for further information.
+ *
+ * @return pdPASS if the co-routine was successfully created and added to a ready
+ * list, otherwise an error code defined with ProjDefs.h.
+ *
+ * Example usage:
+   <pre>
+ // Co-routine to be created.
+ void vFlashCoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ {
+ // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ // This may not be necessary for const variables.
+ static const char cLedToFlash[ 2 ] = { 5, 6 };
+ static const TickType_t uxFlashRates[ 2 ] = { 200, 400 };
+
+     // Must start every co-routine with a call to crSTART();
+     crSTART( xHandle );
+
+     for( ;; )
+     {
+         // This co-routine just delays for a fixed period, then toggles
+         // an LED.  Two co-routines are created using this function, so
+         // the uxIndex parameter is used to tell the co-routine which
+         // LED to flash and how int32_t to delay.  This assumes xQueue has
+         // already been created.
+         vParTestToggleLED( cLedToFlash[ uxIndex ] );
+         crDELAY( xHandle, uxFlashRates[ uxIndex ] );
+     }
+
+     // Must end every co-routine with a call to crEND();
+     crEND();
+ }
+
+ // Function that creates two co-routines.
+ void vOtherFunction( void )
+ {
+ uint8_t ucParameterToPass;
+ TaskHandle_t xHandle;
+
+     // Create two co-routines at priority 0.  The first is given index 0
+     // so (from the code above) toggles LED 5 every 200 ticks.  The second
+     // is given index 1 so toggles LED 6 every 400 ticks.
+     for( uxIndex = 0; uxIndex < 2; uxIndex++ )
+     {
+         xCoRoutineCreate( vFlashCoRoutine, 0, uxIndex );
+     }
+ }
+   </pre>
+ * \defgroup xCoRoutineCreate xCoRoutineCreate
+ * \ingroup Tasks
+ */
+BaseType_t xCoRoutineCreate( crCOROUTINE_CODE pxCoRoutineCode, UBaseType_t uxPriority, UBaseType_t uxIndex );
+
+
+/**
+ * croutine. h
+ *<pre>
+ void vCoRoutineSchedule( void );</pre>
+ *
+ * Run a co-routine.
+ *
+ * vCoRoutineSchedule() executes the highest priority co-routine that is able
+ * to run.  The co-routine will execute until it either blocks, yields or is
+ * preempted by a task.  Co-routines execute cooperatively so one
+ * co-routine cannot be preempted by another, but can be preempted by a task.
+ *
+ * If an application comprises of both tasks and co-routines then
+ * vCoRoutineSchedule should be called from the idle task (in an idle task
+ * hook).
+ *
+ * Example usage:
+   <pre>
+ // This idle task hook will schedule a co-routine each time it is called.
+ // The rest of the idle task will execute between co-routine calls.
+ void vApplicationIdleHook( void )
+ {
+	vCoRoutineSchedule();
+ }
+
+ // Alternatively, if you do not require any other part of the idle task to
+ // execute, the idle task hook can call vCoRoutineScheduler() within an
+ // infinite loop.
+ void vApplicationIdleHook( void )
+ {
+    for( ;; )
+    {
+        vCoRoutineSchedule();
+    }
+ }
+ </pre>
+ * \defgroup vCoRoutineSchedule vCoRoutineSchedule
+ * \ingroup Tasks
+ */
+void vCoRoutineSchedule( void );
+
+/**
+ * croutine. h
+ * <pre>
+ crSTART( CoRoutineHandle_t xHandle );</pre>
+ *
+ * This macro MUST always be called at the start of a co-routine function.
+ *
+ * Example usage:
+   <pre>
+ // Co-routine to be created.
+ void vACoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ {
+ // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ static int32_t ulAVariable;
+
+     // Must start every co-routine with a call to crSTART();
+     crSTART( xHandle );
+
+     for( ;; )
+     {
+          // Co-routine functionality goes here.
+     }
+
+     // Must end every co-routine with a call to crEND();
+     crEND();
+ }</pre>
+ * \defgroup crSTART crSTART
+ * \ingroup Tasks
+ */
+#define crSTART( pxCRCB ) switch( ( ( CRCB_t * )( pxCRCB ) )->uxState ) { case 0:
+
+/**
+ * croutine. h
+ * <pre>
+ crEND();</pre>
+ *
+ * This macro MUST always be called at the end of a co-routine function.
+ *
+ * Example usage:
+   <pre>
+ // Co-routine to be created.
+ void vACoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ {
+ // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ static int32_t ulAVariable;
+
+     // Must start every co-routine with a call to crSTART();
+     crSTART( xHandle );
+
+     for( ;; )
+     {
+          // Co-routine functionality goes here.
+     }
+
+     // Must end every co-routine with a call to crEND();
+     crEND();
+ }</pre>
+ * \defgroup crSTART crSTART
+ * \ingroup Tasks
+ */
+#define crEND() }
+
+/*
+ * These macros are intended for internal use by the co-routine implementation
+ * only.  The macros should not be used directly by application writers.
+ */
+#define crSET_STATE0( xHandle ) ( ( CRCB_t * )( xHandle ) )->uxState = (__LINE__ * 2); return; case (__LINE__ * 2):
+#define crSET_STATE1( xHandle ) ( ( CRCB_t * )( xHandle ) )->uxState = ((__LINE__ * 2)+1); return; case ((__LINE__ * 2)+1):
+
+/**
+ * croutine. h
+ *<pre>
+ crDELAY( CoRoutineHandle_t xHandle, TickType_t xTicksToDelay );</pre>
+ *
+ * Delay a co-routine for a fixed period of time.
+ *
+ * crDELAY can only be called from the co-routine function itself - not
+ * from within a function called by the co-routine function.  This is because
+ * co-routines do not maintain their own stack.
+ *
+ * @param xHandle The handle of the co-routine to delay.  This is the xHandle
+ * parameter of the co-routine function.
+ *
+ * @param xTickToDelay The number of ticks that the co-routine should delay
+ * for.  The actual amount of time this equates to is defined by
+ * configTICK_RATE_HZ (set in FreeRTOSConfig.h).  The constant portTICK_PERIOD_MS
+ * can be used to convert ticks to milliseconds.
+ *
+ * Example usage:
+   <pre>
+ // Co-routine to be created.
+ void vACoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ {
+ // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ // This may not be necessary for const variables.
+ // We are to delay for 200ms.
+ static const xTickType xDelayTime = 200 / portTICK_PERIOD_MS;
+
+     // Must start every co-routine with a call to crSTART();
+     crSTART( xHandle );
+
+     for( ;; )
+     {
+        // Delay for 200ms.
+        crDELAY( xHandle, xDelayTime );
+
+        // Do something here.
+     }
+
+     // Must end every co-routine with a call to crEND();
+     crEND();
+ }</pre>
+ * \defgroup crDELAY crDELAY
+ * \ingroup Tasks
+ */
+#define crDELAY( xHandle, xTicksToDelay )												\
+	if( ( xTicksToDelay ) > 0 )															\
+	{																					\
+		vCoRoutineAddToDelayedList( ( xTicksToDelay ), NULL );							\
+	}																					\
+	crSET_STATE0( ( xHandle ) );
+
+/**
+ * <pre>
+ crQUEUE_SEND(
+                  CoRoutineHandle_t xHandle,
+                  QueueHandle_t pxQueue,
+                  void *pvItemToQueue,
+                  TickType_t xTicksToWait,
+                  BaseType_t *pxResult
+             )</pre>
+ *
+ * The macro's crQUEUE_SEND() and crQUEUE_RECEIVE() are the co-routine
+ * equivalent to the xQueueSend() and xQueueReceive() functions used by tasks.
+ *
+ * crQUEUE_SEND and crQUEUE_RECEIVE can only be used from a co-routine whereas
+ * xQueueSend() and xQueueReceive() can only be used from tasks.
+ *
+ * crQUEUE_SEND can only be called from the co-routine function itself - not
+ * from within a function called by the co-routine function.  This is because
+ * co-routines do not maintain their own stack.
+ *
+ * See the co-routine section of the WEB documentation for information on
+ * passing data between tasks and co-routines and between ISR's and
+ * co-routines.
+ *
+ * @param xHandle The handle of the calling co-routine.  This is the xHandle
+ * parameter of the co-routine function.
+ *
+ * @param pxQueue The handle of the queue on which the data will be posted.
+ * The handle is obtained as the return value when the queue is created using
+ * the xQueueCreate() API function.
+ *
+ * @param pvItemToQueue A pointer to the data being posted onto the queue.
+ * The number of bytes of each queued item is specified when the queue is
+ * created.  This number of bytes is copied from pvItemToQueue into the queue
+ * itself.
+ *
+ * @param xTickToDelay The number of ticks that the co-routine should block
+ * to wait for space to become available on the queue, should space not be
+ * available immediately. The actual amount of time this equates to is defined
+ * by configTICK_RATE_HZ (set in FreeRTOSConfig.h).  The constant
+ * portTICK_PERIOD_MS can be used to convert ticks to milliseconds (see example
+ * below).
+ *
+ * @param pxResult The variable pointed to by pxResult will be set to pdPASS if
+ * data was successfully posted onto the queue, otherwise it will be set to an
+ * error defined within ProjDefs.h.
+ *
+ * Example usage:
+   <pre>
+ // Co-routine function that blocks for a fixed period then posts a number onto
+ // a queue.
+ static void prvCoRoutineFlashTask( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ {
+ // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ static BaseType_t xNumberToPost = 0;
+ static BaseType_t xResult;
+
+    // Co-routines must begin with a call to crSTART().
+    crSTART( xHandle );
+
+    for( ;; )
+    {
+        // This assumes the queue has already been created.
+        crQUEUE_SEND( xHandle, xCoRoutineQueue, &xNumberToPost, NO_DELAY, &xResult );
+
+        if( xResult != pdPASS )
+        {
+            // The message was not posted!
+        }
+
+        // Increment the number to be posted onto the queue.
+        xNumberToPost++;
+
+        // Delay for 100 ticks.
+        crDELAY( xHandle, 100 );
+    }
+
+    // Co-routines must end with a call to crEND().
+    crEND();
+ }</pre>
+ * \defgroup crQUEUE_SEND crQUEUE_SEND
+ * \ingroup Tasks
+ */
+#define crQUEUE_SEND( xHandle, pxQueue, pvItemToQueue, xTicksToWait, pxResult )			\
+{																						\
+	*( pxResult ) = xQueueCRSend( ( pxQueue) , ( pvItemToQueue) , ( xTicksToWait ) );	\
+	if( *( pxResult ) == errQUEUE_BLOCKED )												\
+	{																					\
+		crSET_STATE0( ( xHandle ) );													\
+		*pxResult = xQueueCRSend( ( pxQueue ), ( pvItemToQueue ), 0 );					\
+	}																					\
+	if( *pxResult == errQUEUE_YIELD )													\
+	{																					\
+		crSET_STATE1( ( xHandle ) );													\
+		*pxResult = pdPASS;																\
+	}																					\
+}
+
+/**
+ * croutine. h
+ * <pre>
+  crQUEUE_RECEIVE(
+                     CoRoutineHandle_t xHandle,
+                     QueueHandle_t pxQueue,
+                     void *pvBuffer,
+                     TickType_t xTicksToWait,
+                     BaseType_t *pxResult
+                 )</pre>
+ *
+ * The macro's crQUEUE_SEND() and crQUEUE_RECEIVE() are the co-routine
+ * equivalent to the xQueueSend() and xQueueReceive() functions used by tasks.
+ *
+ * crQUEUE_SEND and crQUEUE_RECEIVE can only be used from a co-routine whereas
+ * xQueueSend() and xQueueReceive() can only be used from tasks.
+ *
+ * crQUEUE_RECEIVE can only be called from the co-routine function itself - not
+ * from within a function called by the co-routine function.  This is because
+ * co-routines do not maintain their own stack.
+ *
+ * See the co-routine section of the WEB documentation for information on
+ * passing data between tasks and co-routines and between ISR's and
+ * co-routines.
+ *
+ * @param xHandle The handle of the calling co-routine.  This is the xHandle
+ * parameter of the co-routine function.
+ *
+ * @param pxQueue The handle of the queue from which the data will be received.
+ * The handle is obtained as the return value when the queue is created using
+ * the xQueueCreate() API function.
+ *
+ * @param pvBuffer The buffer into which the received item is to be copied.
+ * The number of bytes of each queued item is specified when the queue is
+ * created.  This number of bytes is copied into pvBuffer.
+ *
+ * @param xTickToDelay The number of ticks that the co-routine should block
+ * to wait for data to become available from the queue, should data not be
+ * available immediately. The actual amount of time this equates to is defined
+ * by configTICK_RATE_HZ (set in FreeRTOSConfig.h).  The constant
+ * portTICK_PERIOD_MS can be used to convert ticks to milliseconds (see the
+ * crQUEUE_SEND example).
+ *
+ * @param pxResult The variable pointed to by pxResult will be set to pdPASS if
+ * data was successfully retrieved from the queue, otherwise it will be set to
+ * an error code as defined within ProjDefs.h.
+ *
+ * Example usage:
+ <pre>
+ // A co-routine receives the number of an LED to flash from a queue.  It
+ // blocks on the queue until the number is received.
+ static void prvCoRoutineFlashWorkTask( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ {
+ // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ static BaseType_t xResult;
+ static UBaseType_t uxLEDToFlash;
+
+    // All co-routines must start with a call to crSTART().
+    crSTART( xHandle );
+
+    for( ;; )
+    {
+        // Wait for data to become available on the queue.
+        crQUEUE_RECEIVE( xHandle, xCoRoutineQueue, &uxLEDToFlash, portMAX_DELAY, &xResult );
+
+        if( xResult == pdPASS )
+        {
+            // We received the LED to flash - flash it!
+            vParTestToggleLED( uxLEDToFlash );
+        }
+    }
+
+    crEND();
+ }</pre>
+ * \defgroup crQUEUE_RECEIVE crQUEUE_RECEIVE
+ * \ingroup Tasks
+ */
+#define crQUEUE_RECEIVE( xHandle, pxQueue, pvBuffer, xTicksToWait, pxResult )			\
+{																						\
+	*( pxResult ) = xQueueCRReceive( ( pxQueue) , ( pvBuffer ), ( xTicksToWait ) );		\
+	if( *( pxResult ) == errQUEUE_BLOCKED ) 											\
+	{																					\
+		crSET_STATE0( ( xHandle ) );													\
+		*( pxResult ) = xQueueCRReceive( ( pxQueue) , ( pvBuffer ), 0 );				\
+	}																					\
+	if( *( pxResult ) == errQUEUE_YIELD )												\
+	{																					\
+		crSET_STATE1( ( xHandle ) );													\
+		*( pxResult ) = pdPASS;															\
+	}																					\
+}
+
+/**
+ * croutine. h
+ * <pre>
+  crQUEUE_SEND_FROM_ISR(
+                            QueueHandle_t pxQueue,
+                            void *pvItemToQueue,
+                            BaseType_t xCoRoutinePreviouslyWoken
+                       )</pre>
+ *
+ * The macro's crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() are the
+ * co-routine equivalent to the xQueueSendFromISR() and xQueueReceiveFromISR()
+ * functions used by tasks.
+ *
+ * crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() can only be used to
+ * pass data between a co-routine and and ISR, whereas xQueueSendFromISR() and
+ * xQueueReceiveFromISR() can only be used to pass data between a task and and
+ * ISR.
+ *
+ * crQUEUE_SEND_FROM_ISR can only be called from an ISR to send data to a queue
+ * that is being used from within a co-routine.
+ *
+ * See the co-routine section of the WEB documentation for information on
+ * passing data between tasks and co-routines and between ISR's and
+ * co-routines.
+ *
+ * @param xQueue The handle to the queue on which the item is to be posted.
+ *
+ * @param pvItemToQueue A pointer to the item that is to be placed on the
+ * queue.  The size of the items the queue will hold was defined when the
+ * queue was created, so this many bytes will be copied from pvItemToQueue
+ * into the queue storage area.
+ *
+ * @param xCoRoutinePreviouslyWoken This is included so an ISR can post onto
+ * the same queue multiple times from a single interrupt.  The first call
+ * should always pass in pdFALSE.  Subsequent calls should pass in
+ * the value returned from the previous call.
+ *
+ * @return pdTRUE if a co-routine was woken by posting onto the queue.  This is
+ * used by the ISR to determine if a context switch may be required following
+ * the ISR.
+ *
+ * Example usage:
+ <pre>
+ // A co-routine that blocks on a queue waiting for characters to be received.
+ static void vReceivingCoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ {
+ char cRxedChar;
+ BaseType_t xResult;
+
+     // All co-routines must start with a call to crSTART().
+     crSTART( xHandle );
+
+     for( ;; )
+     {
+         // Wait for data to become available on the queue.  This assumes the
+         // queue xCommsRxQueue has already been created!
+         crQUEUE_RECEIVE( xHandle, xCommsRxQueue, &uxLEDToFlash, portMAX_DELAY, &xResult );
+
+         // Was a character received?
+         if( xResult == pdPASS )
+         {
+             // Process the character here.
+         }
+     }
+
+     // All co-routines must end with a call to crEND().
+     crEND();
+ }
+
+ // An ISR that uses a queue to send characters received on a serial port to
+ // a co-routine.
+ void vUART_ISR( void )
+ {
+ char cRxedChar;
+ BaseType_t xCRWokenByPost = pdFALSE;
+
+     // We loop around reading characters until there are none left in the UART.
+     while( UART_RX_REG_NOT_EMPTY() )
+     {
+         // Obtain the character from the UART.
+         cRxedChar = UART_RX_REG;
+
+         // Post the character onto a queue.  xCRWokenByPost will be pdFALSE
+         // the first time around the loop.  If the post causes a co-routine
+         // to be woken (unblocked) then xCRWokenByPost will be set to pdTRUE.
+         // In this manner we can ensure that if more than one co-routine is
+         // blocked on the queue only one is woken by this ISR no matter how
+         // many characters are posted to the queue.
+         xCRWokenByPost = crQUEUE_SEND_FROM_ISR( xCommsRxQueue, &cRxedChar, xCRWokenByPost );
+     }
+ }</pre>
+ * \defgroup crQUEUE_SEND_FROM_ISR crQUEUE_SEND_FROM_ISR
+ * \ingroup Tasks
+ */
+#define crQUEUE_SEND_FROM_ISR( pxQueue, pvItemToQueue, xCoRoutinePreviouslyWoken ) xQueueCRSendFromISR( ( pxQueue ), ( pvItemToQueue ), ( xCoRoutinePreviouslyWoken ) )
+
+
+/**
+ * croutine. h
+ * <pre>
+  crQUEUE_SEND_FROM_ISR(
+                            QueueHandle_t pxQueue,
+                            void *pvBuffer,
+                            BaseType_t * pxCoRoutineWoken
+                       )</pre>
+ *
+ * The macro's crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() are the
+ * co-routine equivalent to the xQueueSendFromISR() and xQueueReceiveFromISR()
+ * functions used by tasks.
+ *
+ * crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() can only be used to
+ * pass data between a co-routine and and ISR, whereas xQueueSendFromISR() and
+ * xQueueReceiveFromISR() can only be used to pass data between a task and and
+ * ISR.
+ *
+ * crQUEUE_RECEIVE_FROM_ISR can only be called from an ISR to receive data
+ * from a queue that is being used from within a co-routine (a co-routine
+ * posted to the queue).
+ *
+ * See the co-routine section of the WEB documentation for information on
+ * passing data between tasks and co-routines and between ISR's and
+ * co-routines.
+ *
+ * @param xQueue The handle to the queue on which the item is to be posted.
+ *
+ * @param pvBuffer A pointer to a buffer into which the received item will be
+ * placed.  The size of the items the queue will hold was defined when the
+ * queue was created, so this many bytes will be copied from the queue into
+ * pvBuffer.
+ *
+ * @param pxCoRoutineWoken A co-routine may be blocked waiting for space to become
+ * available on the queue.  If crQUEUE_RECEIVE_FROM_ISR causes such a
+ * co-routine to unblock *pxCoRoutineWoken will get set to pdTRUE, otherwise
+ * *pxCoRoutineWoken will remain unchanged.
+ *
+ * @return pdTRUE an item was successfully received from the queue, otherwise
+ * pdFALSE.
+ *
+ * Example usage:
+ <pre>
+ // A co-routine that posts a character to a queue then blocks for a fixed
+ // period.  The character is incremented each time.
+ static void vSendingCoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ {
+ // cChar holds its value while this co-routine is blocked and must therefore
+ // be declared static.
+ static char cCharToTx = 'a';
+ BaseType_t xResult;
+
+     // All co-routines must start with a call to crSTART().
+     crSTART( xHandle );
+
+     for( ;; )
+     {
+         // Send the next character to the queue.
+         crQUEUE_SEND( xHandle, xCoRoutineQueue, &cCharToTx, NO_DELAY, &xResult );
+
+         if( xResult == pdPASS )
+         {
+             // The character was successfully posted to the queue.
+         }
+		 else
+		 {
+			// Could not post the character to the queue.
+		 }
+
+         // Enable the UART Tx interrupt to cause an interrupt in this
+		 // hypothetical UART.  The interrupt will obtain the character
+		 // from the queue and send it.
+		 ENABLE_RX_INTERRUPT();
+
+		 // Increment to the next character then block for a fixed period.
+		 // cCharToTx will maintain its value across the delay as it is
+		 // declared static.
+		 cCharToTx++;
+		 if( cCharToTx > 'x' )
+		 {
+			cCharToTx = 'a';
+		 }
+		 crDELAY( 100 );
+     }
+
+     // All co-routines must end with a call to crEND().
+     crEND();
+ }
+
+ // An ISR that uses a queue to receive characters to send on a UART.
+ void vUART_ISR( void )
+ {
+ char cCharToTx;
+ BaseType_t xCRWokenByPost = pdFALSE;
+
+     while( UART_TX_REG_EMPTY() )
+     {
+         // Are there any characters in the queue waiting to be sent?
+		 // xCRWokenByPost will automatically be set to pdTRUE if a co-routine
+		 // is woken by the post - ensuring that only a single co-routine is
+		 // woken no matter how many times we go around this loop.
+         if( crQUEUE_RECEIVE_FROM_ISR( pxQueue, &cCharToTx, &xCRWokenByPost ) )
+		 {
+			 SEND_CHARACTER( cCharToTx );
+		 }
+     }
+ }</pre>
+ * \defgroup crQUEUE_RECEIVE_FROM_ISR crQUEUE_RECEIVE_FROM_ISR
+ * \ingroup Tasks
+ */
+#define crQUEUE_RECEIVE_FROM_ISR( pxQueue, pvBuffer, pxCoRoutineWoken ) xQueueCRReceiveFromISR( ( pxQueue ), ( pvBuffer ), ( pxCoRoutineWoken ) )
+
+/*
+ * This function is intended for internal use by the co-routine macros only.
+ * The macro nature of the co-routine implementation requires that the
+ * prototype appears here.  The function should not be used by application
+ * writers.
+ *
+ * Removes the current co-routine from its ready list and places it in the
+ * appropriate delayed list.
+ */
+void vCoRoutineAddToDelayedList( TickType_t xTicksToDelay, List_t *pxEventList );
+
+/*
+ * This function is intended for internal use by the queue implementation only.
+ * The function should not be used by application writers.
+ *
+ * Removes the highest priority co-routine from the event list and places it in
+ * the pending ready list.
+ */
+BaseType_t xCoRoutineRemoveFromEventList( const List_t *pxEventList );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CO_ROUTINE_H */

Source/include/deprecated_definitions.h

@@ -0,0 +1,321 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#ifndef DEPRECATED_DEFINITIONS_H
+#define DEPRECATED_DEFINITIONS_H
+
+
+/* Each FreeRTOS port has a unique portmacro.h header file.  Originally a
+pre-processor definition was used to ensure the pre-processor found the correct
+portmacro.h file for the port being used.  That scheme was deprecated in favour
+of setting the compiler's include path such that it found the correct
+portmacro.h file - removing the need for the constant and allowing the
+portmacro.h file to be located anywhere in relation to the port being used.  The
+definitions below remain in the code for backward compatibility only.  New
+projects should not use them. */
+
+#ifdef OPEN_WATCOM_INDUSTRIAL_PC_PORT
+	#include "..\..\Source\portable\owatcom\16bitdos\pc\portmacro.h"
+	typedef void ( __interrupt __far *pxISR )();
+#endif
+
+#ifdef OPEN_WATCOM_FLASH_LITE_186_PORT
+	#include "..\..\Source\portable\owatcom\16bitdos\flsh186\portmacro.h"
+	typedef void ( __interrupt __far *pxISR )();
+#endif
+
+#ifdef GCC_MEGA_AVR
+	#include "../portable/GCC/ATMega323/portmacro.h"
+#endif
+
+#ifdef IAR_MEGA_AVR
+	#include "../portable/IAR/ATMega323/portmacro.h"
+#endif
+
+#ifdef MPLAB_PIC24_PORT
+	#include "../../Source/portable/MPLAB/PIC24_dsPIC/portmacro.h"
+#endif
+
+#ifdef MPLAB_DSPIC_PORT
+	#include "../../Source/portable/MPLAB/PIC24_dsPIC/portmacro.h"
+#endif
+
+#ifdef MPLAB_PIC18F_PORT
+	#include "../../Source/portable/MPLAB/PIC18F/portmacro.h"
+#endif
+
+#ifdef MPLAB_PIC32MX_PORT
+	#include "../../Source/portable/MPLAB/PIC32MX/portmacro.h"
+#endif
+
+#ifdef _FEDPICC
+	#include "libFreeRTOS/Include/portmacro.h"
+#endif
+
+#ifdef SDCC_CYGNAL
+	#include "../../Source/portable/SDCC/Cygnal/portmacro.h"
+#endif
+
+#ifdef GCC_ARM7
+	#include "../../Source/portable/GCC/ARM7_LPC2000/portmacro.h"
+#endif
+
+#ifdef GCC_ARM7_ECLIPSE
+	#include "portmacro.h"
+#endif
+
+#ifdef ROWLEY_LPC23xx
+	#include "../../Source/portable/GCC/ARM7_LPC23xx/portmacro.h"
+#endif
+
+#ifdef IAR_MSP430
+	#include "..\..\Source\portable\IAR\MSP430\portmacro.h"
+#endif
+
+#ifdef GCC_MSP430
+	#include "../../Source/portable/GCC/MSP430F449/portmacro.h"
+#endif
+
+#ifdef ROWLEY_MSP430
+	#include "../../Source/portable/Rowley/MSP430F449/portmacro.h"
+#endif
+
+#ifdef ARM7_LPC21xx_KEIL_RVDS
+	#include "..\..\Source\portable\RVDS\ARM7_LPC21xx\portmacro.h"
+#endif
+
+#ifdef SAM7_GCC
+	#include "../../Source/portable/GCC/ARM7_AT91SAM7S/portmacro.h"
+#endif
+
+#ifdef SAM7_IAR
+	#include "..\..\Source\portable\IAR\AtmelSAM7S64\portmacro.h"
+#endif
+
+#ifdef SAM9XE_IAR
+	#include "..\..\Source\portable\IAR\AtmelSAM9XE\portmacro.h"
+#endif
+
+#ifdef LPC2000_IAR
+	#include "..\..\Source\portable\IAR\LPC2000\portmacro.h"
+#endif
+
+#ifdef STR71X_IAR
+	#include "..\..\Source\portable\IAR\STR71x\portmacro.h"
+#endif
+
+#ifdef STR75X_IAR
+	#include "..\..\Source\portable\IAR\STR75x\portmacro.h"
+#endif
+
+#ifdef STR75X_GCC
+	#include "..\..\Source\portable\GCC\STR75x\portmacro.h"
+#endif
+
+#ifdef STR91X_IAR
+	#include "..\..\Source\portable\IAR\STR91x\portmacro.h"
+#endif
+
+#ifdef GCC_H8S
+	#include "../../Source/portable/GCC/H8S2329/portmacro.h"
+#endif
+
+#ifdef GCC_AT91FR40008
+	#include "../../Source/portable/GCC/ARM7_AT91FR40008/portmacro.h"
+#endif
+
+#ifdef RVDS_ARMCM3_LM3S102
+	#include "../../Source/portable/RVDS/ARM_CM3/portmacro.h"
+#endif
+
+#ifdef GCC_ARMCM3_LM3S102
+	#include "../../Source/portable/GCC/ARM_CM3/portmacro.h"
+#endif
+
+#ifdef GCC_ARMCM3
+	#include "../../Source/portable/GCC/ARM_CM3/portmacro.h"
+#endif
+
+#ifdef IAR_ARM_CM3
+	#include "../../Source/portable/IAR/ARM_CM3/portmacro.h"
+#endif
+
+#ifdef IAR_ARMCM3_LM
+	#include "../../Source/portable/IAR/ARM_CM3/portmacro.h"
+#endif
+
+#ifdef HCS12_CODE_WARRIOR
+	#include "../../Source/portable/CodeWarrior/HCS12/portmacro.h"
+#endif
+
+#ifdef MICROBLAZE_GCC
+	#include "../../Source/portable/GCC/MicroBlaze/portmacro.h"
+#endif
+
+#ifdef TERN_EE
+	#include "..\..\Source\portable\Paradigm\Tern_EE\small\portmacro.h"
+#endif
+
+#ifdef GCC_HCS12
+	#include "../../Source/portable/GCC/HCS12/portmacro.h"
+#endif
+
+#ifdef GCC_MCF5235
+    #include "../../Source/portable/GCC/MCF5235/portmacro.h"
+#endif
+
+#ifdef COLDFIRE_V2_GCC
+	#include "../../../Source/portable/GCC/ColdFire_V2/portmacro.h"
+#endif
+
+#ifdef COLDFIRE_V2_CODEWARRIOR
+	#include "../../Source/portable/CodeWarrior/ColdFire_V2/portmacro.h"
+#endif
+
+#ifdef GCC_PPC405
+	#include "../../Source/portable/GCC/PPC405_Xilinx/portmacro.h"
+#endif
+
+#ifdef GCC_PPC440
+	#include "../../Source/portable/GCC/PPC440_Xilinx/portmacro.h"
+#endif
+
+#ifdef _16FX_SOFTUNE
+	#include "..\..\Source\portable\Softune\MB96340\portmacro.h"
+#endif
+
+#ifdef BCC_INDUSTRIAL_PC_PORT
+	/* A short file name has to be used in place of the normal
+	FreeRTOSConfig.h when using the Borland compiler. */
+	#include "frconfig.h"
+	#include "..\portable\BCC\16BitDOS\PC\prtmacro.h"
+    typedef void ( __interrupt __far *pxISR )();
+#endif
+
+#ifdef BCC_FLASH_LITE_186_PORT
+	/* A short file name has to be used in place of the normal
+	FreeRTOSConfig.h when using the Borland compiler. */
+	#include "frconfig.h"
+	#include "..\portable\BCC\16BitDOS\flsh186\prtmacro.h"
+    typedef void ( __interrupt __far *pxISR )();
+#endif
+
+#ifdef __GNUC__
+   #ifdef __AVR32_AVR32A__
+	   #include "portmacro.h"
+   #endif
+#endif
+
+#ifdef __ICCAVR32__
+   #ifdef __CORE__
+      #if __CORE__ == __AVR32A__
+	      #include "portmacro.h"
+      #endif
+   #endif
+#endif
+
+#ifdef __91467D
+	#include "portmacro.h"
+#endif
+
+#ifdef __96340
+	#include "portmacro.h"
+#endif
+
+
+#ifdef __IAR_V850ES_Fx3__
+	#include "../../Source/portable/IAR/V850ES/portmacro.h"
+#endif
+
+#ifdef __IAR_V850ES_Jx3__
+	#include "../../Source/portable/IAR/V850ES/portmacro.h"
+#endif
+
+#ifdef __IAR_V850ES_Jx3_L__
+	#include "../../Source/portable/IAR/V850ES/portmacro.h"
+#endif
+
+#ifdef __IAR_V850ES_Jx2__
+	#include "../../Source/portable/IAR/V850ES/portmacro.h"
+#endif
+
+#ifdef __IAR_V850ES_Hx2__
+	#include "../../Source/portable/IAR/V850ES/portmacro.h"
+#endif
+
+#ifdef __IAR_78K0R_Kx3__
+	#include "../../Source/portable/IAR/78K0R/portmacro.h"
+#endif
+
+#ifdef __IAR_78K0R_Kx3L__
+	#include "../../Source/portable/IAR/78K0R/portmacro.h"
+#endif
+
+#endif /* DEPRECATED_DEFINITIONS_H */
+

Source/include/event_groups.h

@@ -0,0 +1,730 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#ifndef EVENT_GROUPS_H
+#define EVENT_GROUPS_H
+
+#ifndef INC_FREERTOS_H
+	#error "include FreeRTOS.h" must appear in source files before "include event_groups.h"
+#endif
+
+#include "timers.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * An event group is a collection of bits to which an application can assign a
+ * meaning.  For example, an application may create an event group to convey
+ * the status of various CAN bus related events in which bit 0 might mean "A CAN
+ * message has been received and is ready for processing", bit 1 might mean "The
+ * application has queued a message that is ready for sending onto the CAN
+ * network", and bit 2 might mean "It is time to send a SYNC message onto the
+ * CAN network" etc.  A task can then test the bit values to see which events
+ * are active, and optionally enter the Blocked state to wait for a specified
+ * bit or a group of specified bits to be active.  To continue the CAN bus
+ * example, a CAN controlling task can enter the Blocked state (and therefore
+ * not consume any processing time) until either bit 0, bit 1 or bit 2 are
+ * active, at which time the bit that was actually active would inform the task
+ * which action it had to take (process a received message, send a message, or
+ * send a SYNC).
+ *
+ * The event groups implementation contains intelligence to avoid race
+ * conditions that would otherwise occur were an application to use a simple
+ * variable for the same purpose.  This is particularly important with respect
+ * to when a bit within an event group is to be cleared, and when bits have to
+ * be set and then tested atomically - as is the case where event groups are
+ * used to create a synchronisation point between multiple tasks (a
+ * 'rendezvous').
+ *
+ * \defgroup EventGroup
+ */
+
+
+
+/**
+ * event_groups.h
+ *
+ * Type by which event groups are referenced.  For example, a call to
+ * xEventGroupCreate() returns an EventGroupHandle_t variable that can then
+ * be used as a parameter to other event group functions.
+ *
+ * \defgroup EventGroupHandle_t EventGroupHandle_t
+ * \ingroup EventGroup
+ */
+typedef void * EventGroupHandle_t;
+
+/* 
+ * The type that holds event bits always matches TickType_t - therefore the
+ * number of bits it holds is set by configUSE_16_BIT_TICKS (16 bits if set to 1,
+ * 32 bits if set to 0. 
+ *
+ * \defgroup EventBits_t EventBits_t
+ * \ingroup EventGroup
+ */
+typedef TickType_t EventBits_t;
+
+/**
+ * event_groups.h
+ *<pre>
+ EventGroupHandle_t xEventGroupCreate( void );
+ </pre>
+ *
+ * Create a new event group.  This function cannot be called from an interrupt.
+ *
+ * Although event groups are not related to ticks, for internal implementation
+ * reasons the number of bits available for use in an event group is dependent
+ * on the configUSE_16_BIT_TICKS setting in FreeRTOSConfig.h.  If
+ * configUSE_16_BIT_TICKS is 1 then each event group contains 8 usable bits (bit
+ * 0 to bit 7).  If configUSE_16_BIT_TICKS is set to 0 then each event group has
+ * 24 usable bits (bit 0 to bit 23).  The EventBits_t type is used to store
+ * event bits within an event group.
+ *
+ * @return If the event group was created then a handle to the event group is
+ * returned.  If there was insufficient FreeRTOS heap available to create the
+ * event group then NULL is returned.  See http://www.freertos.org/a00111.html
+ *
+ * Example usage:
+   <pre>
+	// Declare a variable to hold the created event group.
+	EventGroupHandle_t xCreatedEventGroup;
+
+	// Attempt to create the event group.
+	xCreatedEventGroup = xEventGroupCreate();
+
+	// Was the event group created successfully?
+	if( xCreatedEventGroup == NULL )
+	{
+		// The event group was not created because there was insufficient
+		// FreeRTOS heap available.
+	}
+	else
+	{
+		// The event group was created.
+	}
+   </pre>
+ * \defgroup xEventGroupCreate xEventGroupCreate
+ * \ingroup EventGroup
+ */
+EventGroupHandle_t xEventGroupCreate( void ) PRIVILEGED_FUNCTION;
+
+/**
+ * event_groups.h
+ *<pre>
+	EventBits_t xEventGroupWaitBits( 	EventGroupHandle_t xEventGroup,
+										const EventBits_t uxBitsToWaitFor,
+										const BaseType_t xClearOnExit,
+										const BaseType_t xWaitForAllBits,
+										const TickType_t xTicksToWait );
+ </pre>
+ *
+ * [Potentially] block to wait for one or more bits to be set within a
+ * previously created event group.
+ *
+ * This function cannot be called from an interrupt.
+ *
+ * @param xEventGroup The event group in which the bits are being tested.  The
+ * event group must have previously been created using a call to
+ * xEventGroupCreate().
+ *
+ * @param uxBitsToWaitFor A bitwise value that indicates the bit or bits to test
+ * inside the event group.  For example, to wait for bit 0 and/or bit 2 set
+ * uxBitsToWaitFor to 0x05.  To wait for bits 0 and/or bit 1 and/or bit 2 set
+ * uxBitsToWaitFor to 0x07.  Etc.
+ *
+ * @param xClearOnExit If xClearOnExit is set to pdTRUE then any bits within
+ * uxBitsToWaitFor that are set within the event group will be cleared before
+ * xEventGroupWaitBits() returns if the wait condition was met (if the function
+ * returns for a reason other than a timeout).  If xClearOnExit is set to
+ * pdFALSE then the bits set in the event group are not altered when the call to
+ * xEventGroupWaitBits() returns.
+ *
+ * @param xWaitForAllBits If xWaitForAllBits is set to pdTRUE then
+ * xEventGroupWaitBits() will return when either all the bits in uxBitsToWaitFor
+ * are set or the specified block time expires.  If xWaitForAllBits is set to
+ * pdFALSE then xEventGroupWaitBits() will return when any one of the bits set
+ * in uxBitsToWaitFor is set or the specified block time expires.  The block
+ * time is specified by the xTicksToWait parameter.
+ *
+ * @param xTicksToWait The maximum amount of time (specified in 'ticks') to wait
+ * for one/all (depending on the xWaitForAllBits value) of the bits specified by
+ * uxBitsToWaitFor to become set.
+ *
+ * @return The value of the event group at the time either the bits being waited
+ * for became set, or the block time expired.  Test the return value to know
+ * which bits were set.  If xEventGroupWaitBits() returned because its timeout
+ * expired then not all the bits being waited for will be set.  If
+ * xEventGroupWaitBits() returned because the bits it was waiting for were set
+ * then the returned value is the event group value before any bits were
+ * automatically cleared in the case that xClearOnExit parameter was set to
+ * pdTRUE.
+ *
+ * Example usage:
+   <pre>
+   #define BIT_0	( 1 << 0 )
+   #define BIT_4	( 1 << 4 )
+
+   void aFunction( EventGroupHandle_t xEventGroup )
+   {
+   EventBits_t uxBits;
+   const TickType_t xTicksToWait = 100 / portTICK_PERIOD_MS;
+
+		// Wait a maximum of 100ms for either bit 0 or bit 4 to be set within
+		// the event group.  Clear the bits before exiting.
+		uxBits = xEventGroupWaitBits(
+					xEventGroup,	// The event group being tested.
+					BIT_0 | BIT_4,	// The bits within the event group to wait for.
+					pdTRUE,			// BIT_0 and BIT_4 should be cleared before returning.
+					pdFALSE,		// Don't wait for both bits, either bit will do.
+					xTicksToWait );	// Wait a maximum of 100ms for either bit to be set.
+
+		if( ( uxBits & ( BIT_0 | BIT_4 ) ) == ( BIT_0 | BIT_4 ) )
+		{
+			// xEventGroupWaitBits() returned because both bits were set.
+		}
+		else if( ( uxBits & BIT_0 ) != 0 )
+		{
+			// xEventGroupWaitBits() returned because just BIT_0 was set.
+		}
+		else if( ( uxBits & BIT_4 ) != 0 )
+		{
+			// xEventGroupWaitBits() returned because just BIT_4 was set.
+		}
+		else
+		{
+			// xEventGroupWaitBits() returned because xTicksToWait ticks passed
+			// without either BIT_0 or BIT_4 becoming set.
+		}
+   }
+   </pre>
+ * \defgroup xEventGroupWaitBits xEventGroupWaitBits
+ * \ingroup EventGroup
+ */
+EventBits_t xEventGroupWaitBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToWaitFor, const BaseType_t xClearOnExit, const BaseType_t xWaitForAllBits, TickType_t xTicksToWait ) PRIVILEGED_FUNCTION;
+
+/**
+ * event_groups.h
+ *<pre>
+	EventBits_t xEventGroupClearBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToClear );
+ </pre>
+ *
+ * Clear bits within an event group.  This function cannot be called from an
+ * interrupt.
+ *
+ * @param xEventGroup The event group in which the bits are to be cleared.
+ *
+ * @param uxBitsToClear A bitwise value that indicates the bit or bits to clear
+ * in the event group.  For example, to clear bit 3 only, set uxBitsToClear to
+ * 0x08.  To clear bit 3 and bit 0 set uxBitsToClear to 0x09.
+ *
+ * @return The value of the event group before the specified bits were cleared.
+ *
+ * Example usage:
+   <pre>
+   #define BIT_0	( 1 << 0 )
+   #define BIT_4	( 1 << 4 )
+
+   void aFunction( EventGroupHandle_t xEventGroup )
+   {
+   EventBits_t uxBits;
+
+		// Clear bit 0 and bit 4 in xEventGroup.
+		uxBits = xEventGroupClearBits(
+								xEventGroup,	// The event group being updated.
+								BIT_0 | BIT_4 );// The bits being cleared.
+
+		if( ( uxBits & ( BIT_0 | BIT_4 ) ) == ( BIT_0 | BIT_4 ) )
+		{
+			// Both bit 0 and bit 4 were set before xEventGroupClearBits() was
+			// called.  Both will now be clear (not set).
+		}
+		else if( ( uxBits & BIT_0 ) != 0 )
+		{
+			// Bit 0 was set before xEventGroupClearBits() was called.  It will
+			// now be clear.
+		}
+		else if( ( uxBits & BIT_4 ) != 0 )
+		{
+			// Bit 4 was set before xEventGroupClearBits() was called.  It will
+			// now be clear.
+		}
+		else
+		{
+			// Neither bit 0 nor bit 4 were set in the first place.
+		}
+   }
+   </pre>
+ * \defgroup xEventGroupClearBits xEventGroupClearBits
+ * \ingroup EventGroup
+ */
+EventBits_t xEventGroupClearBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToClear ) PRIVILEGED_FUNCTION;
+
+/**
+ * event_groups.h
+ *<pre>
+	BaseType_t xEventGroupClearBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet );
+ </pre>
+ *
+ * A version of xEventGroupClearBits() that can be called from an interrupt.
+ *
+ * Setting bits in an event group is not a deterministic operation because there
+ * are an unknown number of tasks that may be waiting for the bit or bits being
+ * set.  FreeRTOS does not allow nondeterministic operations to be performed
+ * while interrupts are disabled, so protects event groups that are accessed
+ * from tasks by suspending the scheduler rather than disabling interrupts.  As
+ * a result event groups cannot be accessed directly from an interrupt service
+ * routine.  Therefore xEventGroupClearBitsFromISR() sends a message to the 
+ * timer task to have the clear operation performed in the context of the timer 
+ * task.
+ *
+ * @param xEventGroup The event group in which the bits are to be cleared.
+ *
+ * @param uxBitsToClear A bitwise value that indicates the bit or bits to clear.
+ * For example, to clear bit 3 only, set uxBitsToClear to 0x08.  To clear bit 3
+ * and bit 0 set uxBitsToClear to 0x09.
+ *
+ * @return If the request to execute the function was posted successfully then 
+ * pdPASS is returned, otherwise pdFALSE is returned.  pdFALSE will be returned 
+ * if the timer service queue was full.
+ *
+ * Example usage:
+   <pre>
+   #define BIT_0	( 1 << 0 )
+   #define BIT_4	( 1 << 4 )
+
+   // An event group which it is assumed has already been created by a call to
+   // xEventGroupCreate().
+   EventGroupHandle_t xEventGroup;
+
+   void anInterruptHandler( void )
+   {
+		// Clear bit 0 and bit 4 in xEventGroup.
+		xResult = xEventGroupClearBitsFromISR(
+							xEventGroup,	 // The event group being updated.
+							BIT_0 | BIT_4 ); // The bits being set.
+
+		if( xResult == pdPASS )
+		{
+			// The message was posted successfully.
+		}
+  }
+   </pre>
+ * \defgroup xEventGroupSetBitsFromISR xEventGroupSetBitsFromISR
+ * \ingroup EventGroup
+ */
+#if( configUSE_TRACE_FACILITY == 1 )
+	BaseType_t xEventGroupClearBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet ) PRIVILEGED_FUNCTION;
+#else
+	#define xEventGroupClearBitsFromISR( xEventGroup, uxBitsToClear ) xTimerPendFunctionCallFromISR( vEventGroupClearBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToClear, NULL )
+#endif
+
+/**
+ * event_groups.h
+ *<pre>
+	EventBits_t xEventGroupSetBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet );
+ </pre>
+ *
+ * Set bits within an event group.
+ * This function cannot be called from an interrupt.  xEventGroupSetBitsFromISR()
+ * is a version that can be called from an interrupt.
+ *
+ * Setting bits in an event group will automatically unblock tasks that are
+ * blocked waiting for the bits.
+ *
+ * @param xEventGroup The event group in which the bits are to be set.
+ *
+ * @param uxBitsToSet A bitwise value that indicates the bit or bits to set.
+ * For example, to set bit 3 only, set uxBitsToSet to 0x08.  To set bit 3
+ * and bit 0 set uxBitsToSet to 0x09.
+ *
+ * @return The value of the event group at the time the call to
+ * xEventGroupSetBits() returns.  There are two reasons why the returned value
+ * might have the bits specified by the uxBitsToSet parameter cleared.  First,
+ * if setting a bit results in a task that was waiting for the bit leaving the
+ * blocked state then it is possible the bit will be cleared automatically
+ * (see the xClearBitOnExit parameter of xEventGroupWaitBits()).  Second, any
+ * unblocked (or otherwise Ready state) task that has a priority above that of
+ * the task that called xEventGroupSetBits() will execute and may change the
+ * event group value before the call to xEventGroupSetBits() returns.
+ *
+ * Example usage:
+   <pre>
+   #define BIT_0	( 1 << 0 )
+   #define BIT_4	( 1 << 4 )
+
+   void aFunction( EventGroupHandle_t xEventGroup )
+   {
+   EventBits_t uxBits;
+
+		// Set bit 0 and bit 4 in xEventGroup.
+		uxBits = xEventGroupSetBits(
+							xEventGroup,	// The event group being updated.
+							BIT_0 | BIT_4 );// The bits being set.
+
+		if( ( uxBits & ( BIT_0 | BIT_4 ) ) == ( BIT_0 | BIT_4 ) )
+		{
+			// Both bit 0 and bit 4 remained set when the function returned.
+		}
+		else if( ( uxBits & BIT_0 ) != 0 )
+		{
+			// Bit 0 remained set when the function returned, but bit 4 was
+			// cleared.  It might be that bit 4 was cleared automatically as a
+			// task that was waiting for bit 4 was removed from the Blocked
+			// state.
+		}
+		else if( ( uxBits & BIT_4 ) != 0 )
+		{
+			// Bit 4 remained set when the function returned, but bit 0 was
+			// cleared.  It might be that bit 0 was cleared automatically as a
+			// task that was waiting for bit 0 was removed from the Blocked
+			// state.
+		}
+		else
+		{
+			// Neither bit 0 nor bit 4 remained set.  It might be that a task
+			// was waiting for both of the bits to be set, and the bits were
+			// cleared as the task left the Blocked state.
+		}
+   }
+   </pre>
+ * \defgroup xEventGroupSetBits xEventGroupSetBits
+ * \ingroup EventGroup
+ */
+EventBits_t xEventGroupSetBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet ) PRIVILEGED_FUNCTION;
+
+/**
+ * event_groups.h
+ *<pre>
+	BaseType_t xEventGroupSetBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet, BaseType_t *pxHigherPriorityTaskWoken );
+ </pre>
+ *
+ * A version of xEventGroupSetBits() that can be called from an interrupt.
+ *
+ * Setting bits in an event group is not a deterministic operation because there
+ * are an unknown number of tasks that may be waiting for the bit or bits being
+ * set.  FreeRTOS does not allow nondeterministic operations to be performed in
+ * interrupts or from critical sections.  Therefore xEventGroupSetBitFromISR()
+ * sends a message to the timer task to have the set operation performed in the
+ * context of the timer task - where a scheduler lock is used in place of a
+ * critical section.
+ *
+ * @param xEventGroup The event group in which the bits are to be set.
+ *
+ * @param uxBitsToSet A bitwise value that indicates the bit or bits to set.
+ * For example, to set bit 3 only, set uxBitsToSet to 0x08.  To set bit 3
+ * and bit 0 set uxBitsToSet to 0x09.
+ *
+ * @param pxHigherPriorityTaskWoken As mentioned above, calling this function
+ * will result in a message being sent to the timer daemon task.  If the
+ * priority of the timer daemon task is higher than the priority of the
+ * currently running task (the task the interrupt interrupted) then
+ * *pxHigherPriorityTaskWoken will be set to pdTRUE by
+ * xEventGroupSetBitsFromISR(), indicating that a context switch should be
+ * requested before the interrupt exits.  For that reason
+ * *pxHigherPriorityTaskWoken must be initialised to pdFALSE.  See the
+ * example code below.
+ *
+ * @return If the request to execute the function was posted successfully then 
+ * pdPASS is returned, otherwise pdFALSE is returned.  pdFALSE will be returned 
+ * if the timer service queue was full.
+ *
+ * Example usage:
+   <pre>
+   #define BIT_0	( 1 << 0 )
+   #define BIT_4	( 1 << 4 )
+
+   // An event group which it is assumed has already been created by a call to
+   // xEventGroupCreate().
+   EventGroupHandle_t xEventGroup;
+
+   void anInterruptHandler( void )
+   {
+   BaseType_t xHigherPriorityTaskWoken, xResult;
+
+		// xHigherPriorityTaskWoken must be initialised to pdFALSE.
+		xHigherPriorityTaskWoken = pdFALSE;
+
+		// Set bit 0 and bit 4 in xEventGroup.
+		xResult = xEventGroupSetBitsFromISR(
+							xEventGroup,	// The event group being updated.
+							BIT_0 | BIT_4   // The bits being set.
+							&xHigherPriorityTaskWoken );
+
+		// Was the message posted successfully?
+		if( xResult == pdPASS )
+		{
+			// If xHigherPriorityTaskWoken is now set to pdTRUE then a context
+			// switch should be requested.  The macro used is port specific and 
+			// will be either portYIELD_FROM_ISR() or portEND_SWITCHING_ISR() - 
+			// refer to the documentation page for the port being used.
+			portYIELD_FROM_ISR( xHigherPriorityTaskWoken );
+		}
+  }
+   </pre>
+ * \defgroup xEventGroupSetBitsFromISR xEventGroupSetBitsFromISR
+ * \ingroup EventGroup
+ */
+#if( configUSE_TRACE_FACILITY == 1 )
+	BaseType_t xEventGroupSetBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet, BaseType_t *pxHigherPriorityTaskWoken ) PRIVILEGED_FUNCTION;
+#else
+	#define xEventGroupSetBitsFromISR( xEventGroup, uxBitsToSet, pxHigherPriorityTaskWoken ) xTimerPendFunctionCallFromISR( vEventGroupSetBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToSet, pxHigherPriorityTaskWoken )
+#endif
+
+/**
+ * event_groups.h
+ *<pre>
+	EventBits_t xEventGroupSync(	EventGroupHandle_t xEventGroup,
+									const EventBits_t uxBitsToSet,
+									const EventBits_t uxBitsToWaitFor,
+									TickType_t xTicksToWait );
+ </pre>
+ *
+ * Atomically set bits within an event group, then wait for a combination of
+ * bits to be set within the same event group.  This functionality is typically
+ * used to synchronise multiple tasks, where each task has to wait for the other
+ * tasks to reach a synchronisation point before proceeding.
+ *
+ * This function cannot be used from an interrupt.
+ *
+ * The function will return before its block time expires if the bits specified
+ * by the uxBitsToWait parameter are set, or become set within that time.  In
+ * this case all the bits specified by uxBitsToWait will be automatically
+ * cleared before the function returns.
+ *
+ * @param xEventGroup The event group in which the bits are being tested.  The
+ * event group must have previously been created using a call to
+ * xEventGroupCreate().
+ *
+ * @param uxBitsToSet The bits to set in the event group before determining
+ * if, and possibly waiting for, all the bits specified by the uxBitsToWait
+ * parameter are set.
+ *
+ * @param uxBitsToWaitFor A bitwise value that indicates the bit or bits to test
+ * inside the event group.  For example, to wait for bit 0 and bit 2 set
+ * uxBitsToWaitFor to 0x05.  To wait for bits 0 and bit 1 and bit 2 set
+ * uxBitsToWaitFor to 0x07.  Etc.
+ *
+ * @param xTicksToWait The maximum amount of time (specified in 'ticks') to wait
+ * for all of the bits specified by uxBitsToWaitFor to become set.
+ *
+ * @return The value of the event group at the time either the bits being waited
+ * for became set, or the block time expired.  Test the return value to know
+ * which bits were set.  If xEventGroupSync() returned because its timeout
+ * expired then not all the bits being waited for will be set.  If
+ * xEventGroupSync() returned because all the bits it was waiting for were
+ * set then the returned value is the event group value before any bits were
+ * automatically cleared.
+ *
+ * Example usage:
+ <pre>
+ // Bits used by the three tasks.
+ #define TASK_0_BIT		( 1 << 0 )
+ #define TASK_1_BIT		( 1 << 1 )
+ #define TASK_2_BIT		( 1 << 2 )
+
+ #define ALL_SYNC_BITS ( TASK_0_BIT | TASK_1_BIT | TASK_2_BIT )
+
+ // Use an event group to synchronise three tasks.  It is assumed this event
+ // group has already been created elsewhere.
+ EventGroupHandle_t xEventBits;
+
+ void vTask0( void *pvParameters )
+ {
+ EventBits_t uxReturn;
+ TickType_t xTicksToWait = 100 / portTICK_PERIOD_MS;
+
+	 for( ;; )
+	 {
+		// Perform task functionality here.
+
+		// Set bit 0 in the event flag to note this task has reached the
+		// sync point.  The other two tasks will set the other two bits defined
+		// by ALL_SYNC_BITS.  All three tasks have reached the synchronisation
+		// point when all the ALL_SYNC_BITS are set.  Wait a maximum of 100ms
+		// for this to happen.
+		uxReturn = xEventGroupSync( xEventBits, TASK_0_BIT, ALL_SYNC_BITS, xTicksToWait );
+
+		if( ( uxReturn & ALL_SYNC_BITS ) == ALL_SYNC_BITS )
+		{
+			// All three tasks reached the synchronisation point before the call
+			// to xEventGroupSync() timed out.
+		}
+	}
+ }
+
+ void vTask1( void *pvParameters )
+ {
+	 for( ;; )
+	 {
+		// Perform task functionality here.
+
+		// Set bit 1 in the event flag to note this task has reached the
+		// synchronisation point.  The other two tasks will set the other two
+		// bits defined by ALL_SYNC_BITS.  All three tasks have reached the
+		// synchronisation point when all the ALL_SYNC_BITS are set.  Wait
+		// indefinitely for this to happen.
+		xEventGroupSync( xEventBits, TASK_1_BIT, ALL_SYNC_BITS, portMAX_DELAY );
+
+		// xEventGroupSync() was called with an indefinite block time, so
+		// this task will only reach here if the syncrhonisation was made by all
+		// three tasks, so there is no need to test the return value.
+	 }
+ }
+
+ void vTask2( void *pvParameters )
+ {
+	 for( ;; )
+	 {
+		// Perform task functionality here.
+
+		// Set bit 2 in the event flag to note this task has reached the
+		// synchronisation point.  The other two tasks will set the other two
+		// bits defined by ALL_SYNC_BITS.  All three tasks have reached the
+		// synchronisation point when all the ALL_SYNC_BITS are set.  Wait
+		// indefinitely for this to happen.
+		xEventGroupSync( xEventBits, TASK_2_BIT, ALL_SYNC_BITS, portMAX_DELAY );
+
+		// xEventGroupSync() was called with an indefinite block time, so
+		// this task will only reach here if the syncrhonisation was made by all
+		// three tasks, so there is no need to test the return value.
+	}
+ }
+
+ </pre>
+ * \defgroup xEventGroupSync xEventGroupSync
+ * \ingroup EventGroup
+ */
+EventBits_t xEventGroupSync( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet, const EventBits_t uxBitsToWaitFor, TickType_t xTicksToWait ) PRIVILEGED_FUNCTION;
+
+
+/**
+ * event_groups.h
+ *<pre>
+	EventBits_t xEventGroupGetBits( EventGroupHandle_t xEventGroup );
+ </pre>
+ *
+ * Returns the current value of the bits in an event group.  This function
+ * cannot be used from an interrupt.
+ *
+ * @param xEventGroup The event group being queried.
+ *
+ * @return The event group bits at the time xEventGroupGetBits() was called.
+ *
+ * \defgroup xEventGroupGetBits xEventGroupGetBits
+ * \ingroup EventGroup
+ */
+#define xEventGroupGetBits( xEventGroup ) xEventGroupClearBits( xEventGroup, 0 )
+
+/**
+ * event_groups.h
+ *<pre>
+	EventBits_t xEventGroupGetBitsFromISR( EventGroupHandle_t xEventGroup );
+ </pre>
+ *
+ * A version of xEventGroupGetBits() that can be called from an ISR.
+ *
+ * @param xEventGroup The event group being queried.
+ *
+ * @return The event group bits at the time xEventGroupGetBitsFromISR() was called.
+ *
+ * \defgroup xEventGroupGetBitsFromISR xEventGroupGetBitsFromISR
+ * \ingroup EventGroup
+ */
+EventBits_t xEventGroupGetBitsFromISR( EventGroupHandle_t xEventGroup ) PRIVILEGED_FUNCTION;
+
+/**
+ * event_groups.h
+ *<pre>
+	void xEventGroupDelete( EventGroupHandle_t xEventGroup );
+ </pre>
+ *
+ * Delete an event group that was previously created by a call to
+ * xEventGroupCreate().  Tasks that are blocked on the event group will be
+ * unblocked and obtain 0 as the event group's value.
+ *
+ * @param xEventGroup The event group being deleted.
+ */
+void vEventGroupDelete( EventGroupHandle_t xEventGroup ) PRIVILEGED_FUNCTION;
+
+/* For internal use only. */
+void vEventGroupSetBitsCallback( void *pvEventGroup, const uint32_t ulBitsToSet ) PRIVILEGED_FUNCTION;
+void vEventGroupClearBitsCallback( void *pvEventGroup, const uint32_t ulBitsToClear ) PRIVILEGED_FUNCTION;
+
+#if (configUSE_TRACE_FACILITY == 1)
+	UBaseType_t uxEventGroupGetNumber( void* xEventGroup ) PRIVILEGED_FUNCTION;
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT_GROUPS_H */
+
+

Source/include/gpio.h

@@ -0,0 +1,15 @@
+#ifndef GPIO_H_
+#define GPIO_H_
+
+
+typedef struct
+{
+  volatile uint32_t INPUT;
+  volatile uint32_t OUTPUT;
+  volatile uint32_t OUTPUT_ENABLE;
+} Gpio_Reg;
+
+
+#endif /* GPIO_H_ */
+
+

Source/include/interrupt.h

@@ -0,0 +1,17 @@
+#ifndef INTERRUPTCTRL_H_
+#define INTERRUPTCTRL_H_
+
+#include <stdint.h>
+
+typedef struct
+{
+  volatile uint32_t PENDINGS;
+  volatile uint32_t MASKS;
+} InterruptCtrl_Reg;
+
+static void interruptCtrl_init(InterruptCtrl_Reg* reg){
+	reg->MASKS = 0;
+	reg->PENDINGS = 0xFFFFFFFF;
+}
+
+#endif /* INTERRUPTCTRL_H_ */

Source/include/list.h

@@ -0,0 +1,453 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+/*
+ * This is the list implementation used by the scheduler.  While it is tailored
+ * heavily for the schedulers needs, it is also available for use by
+ * application code.
+ *
+ * list_ts can only store pointers to list_item_ts.  Each ListItem_t contains a
+ * numeric value (xItemValue).  Most of the time the lists are sorted in
+ * descending item value order.
+ *
+ * Lists are created already containing one list item.  The value of this
+ * item is the maximum possible that can be stored, it is therefore always at
+ * the end of the list and acts as a marker.  The list member pxHead always
+ * points to this marker - even though it is at the tail of the list.  This
+ * is because the tail contains a wrap back pointer to the true head of
+ * the list.
+ *
+ * In addition to it's value, each list item contains a pointer to the next
+ * item in the list (pxNext), a pointer to the list it is in (pxContainer)
+ * and a pointer to back to the object that contains it.  These later two
+ * pointers are included for efficiency of list manipulation.  There is
+ * effectively a two way link between the object containing the list item and
+ * the list item itself.
+ *
+ *
+ * \page ListIntroduction List Implementation
+ * \ingroup FreeRTOSIntro
+ */
+
+#ifndef INC_FREERTOS_H
+	#error FreeRTOS.h must be included before list.h
+#endif
+
+#ifndef LIST_H
+#define LIST_H
+
+/*
+ * The list structure members are modified from within interrupts, and therefore
+ * by rights should be declared volatile.  However, they are only modified in a
+ * functionally atomic way (within critical sections of with the scheduler
+ * suspended) and are either passed by reference into a function or indexed via
+ * a volatile variable.  Therefore, in all use cases tested so far, the volatile
+ * qualifier can be omitted in order to provide a moderate performance
+ * improvement without adversely affecting functional behaviour.  The assembly
+ * instructions generated by the IAR, ARM and GCC compilers when the respective
+ * compiler's options were set for maximum optimisation has been inspected and
+ * deemed to be as intended.  That said, as compiler technology advances, and
+ * especially if aggressive cross module optimisation is used (a use case that
+ * has not been exercised to any great extend) then it is feasible that the
+ * volatile qualifier will be needed for correct optimisation.  It is expected
+ * that a compiler removing essential code because, without the volatile
+ * qualifier on the list structure members and with aggressive cross module
+ * optimisation, the compiler deemed the code unnecessary will result in
+ * complete and obvious failure of the scheduler.  If this is ever experienced
+ * then the volatile qualifier can be inserted in the relevant places within the
+ * list structures by simply defining configLIST_VOLATILE to volatile in
+ * FreeRTOSConfig.h (as per the example at the bottom of this comment block).
+ * If configLIST_VOLATILE is not defined then the preprocessor directives below
+ * will simply #define configLIST_VOLATILE away completely.
+ *
+ * To use volatile list structure members then add the following line to
+ * FreeRTOSConfig.h (without the quotes):
+ * "#define configLIST_VOLATILE volatile"
+ */
+#ifndef configLIST_VOLATILE
+	#define configLIST_VOLATILE
+#endif /* configSUPPORT_CROSS_MODULE_OPTIMISATION */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Macros that can be used to place known values within the list structures,
+then check that the known values do not get corrupted during the execution of
+the application.   These may catch the list data structures being overwritten in
+memory.  They will not catch data errors caused by incorrect configuration or
+use of FreeRTOS.*/
+#if( configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES == 0 )
+	/* Define the macros to do nothing. */
+	#define listFIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE
+	#define listSECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE
+	#define listFIRST_LIST_INTEGRITY_CHECK_VALUE
+	#define listSECOND_LIST_INTEGRITY_CHECK_VALUE
+	#define listSET_FIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem )
+	#define listSET_SECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem )
+	#define listSET_LIST_INTEGRITY_CHECK_1_VALUE( pxList )
+	#define listSET_LIST_INTEGRITY_CHECK_2_VALUE( pxList )
+	#define listTEST_LIST_ITEM_INTEGRITY( pxItem )
+	#define listTEST_LIST_INTEGRITY( pxList )
+#else
+	/* Define macros that add new members into the list structures. */
+	#define listFIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE				TickType_t xListItemIntegrityValue1;
+	#define listSECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE				TickType_t xListItemIntegrityValue2;
+	#define listFIRST_LIST_INTEGRITY_CHECK_VALUE					TickType_t xListIntegrityValue1;
+	#define listSECOND_LIST_INTEGRITY_CHECK_VALUE					TickType_t xListIntegrityValue2;
+
+	/* Define macros that set the new structure members to known values. */
+	#define listSET_FIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem )		( pxItem )->xListItemIntegrityValue1 = pdINTEGRITY_CHECK_VALUE
+	#define listSET_SECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem )	( pxItem )->xListItemIntegrityValue2 = pdINTEGRITY_CHECK_VALUE
+	#define listSET_LIST_INTEGRITY_CHECK_1_VALUE( pxList )		( pxList )->xListIntegrityValue1 = pdINTEGRITY_CHECK_VALUE
+	#define listSET_LIST_INTEGRITY_CHECK_2_VALUE( pxList )		( pxList )->xListIntegrityValue2 = pdINTEGRITY_CHECK_VALUE
+
+	/* Define macros that will assert if one of the structure members does not
+	contain its expected value. */
+	#define listTEST_LIST_ITEM_INTEGRITY( pxItem )		configASSERT( ( ( pxItem )->xListItemIntegrityValue1 == pdINTEGRITY_CHECK_VALUE ) && ( ( pxItem )->xListItemIntegrityValue2 == pdINTEGRITY_CHECK_VALUE ) )
+	#define listTEST_LIST_INTEGRITY( pxList )			configASSERT( ( ( pxList )->xListIntegrityValue1 == pdINTEGRITY_CHECK_VALUE ) && ( ( pxList )->xListIntegrityValue2 == pdINTEGRITY_CHECK_VALUE ) )
+#endif /* configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES */
+
+
+/*
+ * Definition of the only type of object that a list can contain.
+ */
+struct xLIST_ITEM
+{
+	listFIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE			/*< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+	configLIST_VOLATILE TickType_t xItemValue;			/*< The value being listed.  In most cases this is used to sort the list in descending order. */
+	struct xLIST_ITEM * configLIST_VOLATILE pxNext;		/*< Pointer to the next ListItem_t in the list. */
+	struct xLIST_ITEM * configLIST_VOLATILE pxPrevious;	/*< Pointer to the previous ListItem_t in the list. */
+	void * pvOwner;										/*< Pointer to the object (normally a TCB) that contains the list item.  There is therefore a two way link between the object containing the list item and the list item itself. */
+	void * configLIST_VOLATILE pvContainer;				/*< Pointer to the list in which this list item is placed (if any). */
+	listSECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE			/*< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+};
+typedef struct xLIST_ITEM ListItem_t;					/* For some reason lint wants this as two separate definitions. */
+
+struct xMINI_LIST_ITEM
+{
+	listFIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE			/*< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+	configLIST_VOLATILE TickType_t xItemValue;
+	struct xLIST_ITEM * configLIST_VOLATILE pxNext;
+	struct xLIST_ITEM * configLIST_VOLATILE pxPrevious;
+};
+typedef struct xMINI_LIST_ITEM MiniListItem_t;
+
+/*
+ * Definition of the type of queue used by the scheduler.
+ */
+typedef struct xLIST
+{
+	listFIRST_LIST_INTEGRITY_CHECK_VALUE				/*< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+	configLIST_VOLATILE UBaseType_t uxNumberOfItems;
+	ListItem_t * configLIST_VOLATILE pxIndex;			/*< Used to walk through the list.  Points to the last item returned by a call to listGET_OWNER_OF_NEXT_ENTRY (). */
+	MiniListItem_t xListEnd;							/*< List item that contains the maximum possible item value meaning it is always at the end of the list and is therefore used as a marker. */
+	listSECOND_LIST_INTEGRITY_CHECK_VALUE				/*< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+} List_t;
+
+/*
+ * Access macro to set the owner of a list item.  The owner of a list item
+ * is the object (usually a TCB) that contains the list item.
+ *
+ * \page listSET_LIST_ITEM_OWNER listSET_LIST_ITEM_OWNER
+ * \ingroup LinkedList
+ */
+#define listSET_LIST_ITEM_OWNER( pxListItem, pxOwner )		( ( pxListItem )->pvOwner = ( void * ) ( pxOwner ) )
+
+/*
+ * Access macro to get the owner of a list item.  The owner of a list item
+ * is the object (usually a TCB) that contains the list item.
+ *
+ * \page listSET_LIST_ITEM_OWNER listSET_LIST_ITEM_OWNER
+ * \ingroup LinkedList
+ */
+#define listGET_LIST_ITEM_OWNER( pxListItem )	( ( pxListItem )->pvOwner )
+
+/*
+ * Access macro to set the value of the list item.  In most cases the value is
+ * used to sort the list in descending order.
+ *
+ * \page listSET_LIST_ITEM_VALUE listSET_LIST_ITEM_VALUE
+ * \ingroup LinkedList
+ */
+#define listSET_LIST_ITEM_VALUE( pxListItem, xValue )	( ( pxListItem )->xItemValue = ( xValue ) )
+
+/*
+ * Access macro to retrieve the value of the list item.  The value can
+ * represent anything - for example the priority of a task, or the time at
+ * which a task should be unblocked.
+ *
+ * \page listGET_LIST_ITEM_VALUE listGET_LIST_ITEM_VALUE
+ * \ingroup LinkedList
+ */
+#define listGET_LIST_ITEM_VALUE( pxListItem )	( ( pxListItem )->xItemValue )
+
+/*
+ * Access macro to retrieve the value of the list item at the head of a given
+ * list.
+ *
+ * \page listGET_LIST_ITEM_VALUE listGET_LIST_ITEM_VALUE
+ * \ingroup LinkedList
+ */
+#define listGET_ITEM_VALUE_OF_HEAD_ENTRY( pxList )	( ( ( pxList )->xListEnd ).pxNext->xItemValue )
+
+/*
+ * Return the list item at the head of the list.
+ *
+ * \page listGET_HEAD_ENTRY listGET_HEAD_ENTRY
+ * \ingroup LinkedList
+ */
+#define listGET_HEAD_ENTRY( pxList )	( ( ( pxList )->xListEnd ).pxNext )
+
+/*
+ * Return the list item at the head of the list.
+ *
+ * \page listGET_NEXT listGET_NEXT
+ * \ingroup LinkedList
+ */
+#define listGET_NEXT( pxListItem )	( ( pxListItem )->pxNext )
+
+/*
+ * Return the list item that marks the end of the list
+ *
+ * \page listGET_END_MARKER listGET_END_MARKER
+ * \ingroup LinkedList
+ */
+#define listGET_END_MARKER( pxList )	( ( ListItem_t const * ) ( &( ( pxList )->xListEnd ) ) )
+
+/*
+ * Access macro to determine if a list contains any items.  The macro will
+ * only have the value true if the list is empty.
+ *
+ * \page listLIST_IS_EMPTY listLIST_IS_EMPTY
+ * \ingroup LinkedList
+ */
+#define listLIST_IS_EMPTY( pxList )	( ( BaseType_t ) ( ( pxList )->uxNumberOfItems == ( UBaseType_t ) 0 ) )
+
+/*
+ * Access macro to return the number of items in the list.
+ */
+#define listCURRENT_LIST_LENGTH( pxList )	( ( pxList )->uxNumberOfItems )
+
+/*
+ * Access function to obtain the owner of the next entry in a list.
+ *
+ * The list member pxIndex is used to walk through a list.  Calling
+ * listGET_OWNER_OF_NEXT_ENTRY increments pxIndex to the next item in the list
+ * and returns that entry's pxOwner parameter.  Using multiple calls to this
+ * function it is therefore possible to move through every item contained in
+ * a list.
+ *
+ * The pxOwner parameter of a list item is a pointer to the object that owns
+ * the list item.  In the scheduler this is normally a task control block.
+ * The pxOwner parameter effectively creates a two way link between the list
+ * item and its owner.
+ *
+ * @param pxTCB pxTCB is set to the address of the owner of the next list item.
+ * @param pxList The list from which the next item owner is to be returned.
+ *
+ * \page listGET_OWNER_OF_NEXT_ENTRY listGET_OWNER_OF_NEXT_ENTRY
+ * \ingroup LinkedList
+ */
+#define listGET_OWNER_OF_NEXT_ENTRY( pxTCB, pxList )										\
+{																							\
+List_t * const pxConstList = ( pxList );													\
+	/* Increment the index to the next item and return the item, ensuring */				\
+	/* we don't return the marker used at the end of the list.  */							\
+	( pxConstList )->pxIndex = ( pxConstList )->pxIndex->pxNext;							\
+	if( ( void * ) ( pxConstList )->pxIndex == ( void * ) &( ( pxConstList )->xListEnd ) )	\
+	{																						\
+		( pxConstList )->pxIndex = ( pxConstList )->pxIndex->pxNext;						\
+	}																						\
+	( pxTCB ) = ( pxConstList )->pxIndex->pvOwner;											\
+}
+
+
+/*
+ * Access function to obtain the owner of the first entry in a list.  Lists
+ * are normally sorted in ascending item value order.
+ *
+ * This function returns the pxOwner member of the first item in the list.
+ * The pxOwner parameter of a list item is a pointer to the object that owns
+ * the list item.  In the scheduler this is normally a task control block.
+ * The pxOwner parameter effectively creates a two way link between the list
+ * item and its owner.
+ *
+ * @param pxList The list from which the owner of the head item is to be
+ * returned.
+ *
+ * \page listGET_OWNER_OF_HEAD_ENTRY listGET_OWNER_OF_HEAD_ENTRY
+ * \ingroup LinkedList
+ */
+#define listGET_OWNER_OF_HEAD_ENTRY( pxList )  ( (&( ( pxList )->xListEnd ))->pxNext->pvOwner )
+
+/*
+ * Check to see if a list item is within a list.  The list item maintains a
+ * "container" pointer that points to the list it is in.  All this macro does
+ * is check to see if the container and the list match.
+ *
+ * @param pxList The list we want to know if the list item is within.
+ * @param pxListItem The list item we want to know if is in the list.
+ * @return pdTRUE if the list item is in the list, otherwise pdFALSE.
+ */
+#define listIS_CONTAINED_WITHIN( pxList, pxListItem ) ( ( BaseType_t ) ( ( pxListItem )->pvContainer == ( void * ) ( pxList ) ) )
+
+/*
+ * Return the list a list item is contained within (referenced from).
+ *
+ * @param pxListItem The list item being queried.
+ * @return A pointer to the List_t object that references the pxListItem
+ */
+#define listLIST_ITEM_CONTAINER( pxListItem ) ( ( pxListItem )->pvContainer )
+
+/*
+ * This provides a crude means of knowing if a list has been initialised, as
+ * pxList->xListEnd.xItemValue is set to portMAX_DELAY by the vListInitialise()
+ * function.
+ */
+#define listLIST_IS_INITIALISED( pxList ) ( ( pxList )->xListEnd.xItemValue == portMAX_DELAY )
+
+/*
+ * Must be called before a list is used!  This initialises all the members
+ * of the list structure and inserts the xListEnd item into the list as a
+ * marker to the back of the list.
+ *
+ * @param pxList Pointer to the list being initialised.
+ *
+ * \page vListInitialise vListInitialise
+ * \ingroup LinkedList
+ */
+void vListInitialise( List_t * const pxList ) PRIVILEGED_FUNCTION;
+
+/*
+ * Must be called before a list item is used.  This sets the list container to
+ * null so the item does not think that it is already contained in a list.
+ *
+ * @param pxItem Pointer to the list item being initialised.
+ *
+ * \page vListInitialiseItem vListInitialiseItem
+ * \ingroup LinkedList
+ */
+void vListInitialiseItem( ListItem_t * const pxItem ) PRIVILEGED_FUNCTION;
+
+/*
+ * Insert a list item into a list.  The item will be inserted into the list in
+ * a position determined by its item value (descending item value order).
+ *
+ * @param pxList The list into which the item is to be inserted.
+ *
+ * @param pxNewListItem The item that is to be placed in the list.
+ *
+ * \page vListInsert vListInsert
+ * \ingroup LinkedList
+ */
+void vListInsert( List_t * const pxList, ListItem_t * const pxNewListItem ) PRIVILEGED_FUNCTION;
+
+/*
+ * Insert a list item into a list.  The item will be inserted in a position
+ * such that it will be the last item within the list returned by multiple
+ * calls to listGET_OWNER_OF_NEXT_ENTRY.
+ *
+ * The list member pvIndex is used to walk through a list.  Calling
+ * listGET_OWNER_OF_NEXT_ENTRY increments pvIndex to the next item in the list.
+ * Placing an item in a list using vListInsertEnd effectively places the item
+ * in the list position pointed to by pvIndex.  This means that every other
+ * item within the list will be returned by listGET_OWNER_OF_NEXT_ENTRY before
+ * the pvIndex parameter again points to the item being inserted.
+ *
+ * @param pxList The list into which the item is to be inserted.
+ *
+ * @param pxNewListItem The list item to be inserted into the list.
+ *
+ * \page vListInsertEnd vListInsertEnd
+ * \ingroup LinkedList
+ */
+void vListInsertEnd( List_t * const pxList, ListItem_t * const pxNewListItem ) PRIVILEGED_FUNCTION;
+
+/*
+ * Remove an item from a list.  The list item has a pointer to the list that
+ * it is in, so only the list item need be passed into the function.
+ *
+ * @param uxListRemove The item to be removed.  The item will remove itself from
+ * the list pointed to by it's pxContainer parameter.
+ *
+ * @return The number of items that remain in the list after the list item has
+ * been removed.
+ *
+ * \page uxListRemove uxListRemove
+ * \ingroup LinkedList
+ */
+UBaseType_t uxListRemove( ListItem_t * const pxItemToRemove ) PRIVILEGED_FUNCTION;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+

Source/include/mpu_wrappers.h

@@ -0,0 +1,177 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#ifndef MPU_WRAPPERS_H
+#define MPU_WRAPPERS_H
+
+/* This file redefines API functions to be called through a wrapper macro, but
+only for ports that are using the MPU. */
+#ifdef portUSING_MPU_WRAPPERS
+
+	/* MPU_WRAPPERS_INCLUDED_FROM_API_FILE will be defined when this file is
+	included from queue.c or task.c to prevent it from having an effect within
+	those files. */
+	#ifndef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+		#define xTaskGenericCreate				MPU_xTaskGenericCreate
+		#define vTaskAllocateMPURegions			MPU_vTaskAllocateMPURegions
+		#define vTaskDelete						MPU_vTaskDelete
+		#define vTaskDelayUntil					MPU_vTaskDelayUntil
+		#define vTaskDelay						MPU_vTaskDelay
+		#define uxTaskPriorityGet				MPU_uxTaskPriorityGet
+		#define vTaskPrioritySet				MPU_vTaskPrioritySet
+		#define eTaskGetState					MPU_eTaskGetState
+		#define vTaskSuspend					MPU_vTaskSuspend
+		#define vTaskResume						MPU_vTaskResume
+		#define vTaskSuspendAll					MPU_vTaskSuspendAll
+		#define xTaskResumeAll					MPU_xTaskResumeAll
+		#define xTaskGetTickCount				MPU_xTaskGetTickCount
+		#define uxTaskGetNumberOfTasks			MPU_uxTaskGetNumberOfTasks
+		#define vTaskList						MPU_vTaskList
+		#define vTaskGetRunTimeStats			MPU_vTaskGetRunTimeStats
+		#define vTaskSetApplicationTaskTag		MPU_vTaskSetApplicationTaskTag
+		#define xTaskGetApplicationTaskTag		MPU_xTaskGetApplicationTaskTag
+		#define xTaskCallApplicationTaskHook	MPU_xTaskCallApplicationTaskHook
+		#define uxTaskGetStackHighWaterMark		MPU_uxTaskGetStackHighWaterMark
+		#define xTaskGetCurrentTaskHandle		MPU_xTaskGetCurrentTaskHandle
+		#define xTaskGetSchedulerState			MPU_xTaskGetSchedulerState
+		#define xTaskGetIdleTaskHandle			MPU_xTaskGetIdleTaskHandle
+		#define uxTaskGetSystemState			MPU_uxTaskGetSystemState
+		#define xTaskGenericNotify				MPU_xTaskGenericNotify
+		#define xTaskNotifyWait					MPU_xTaskNotifyWait
+		#define ulTaskNotifyTake				MPU_ulTaskNotifyTake
+
+		#define xQueueGenericCreate				MPU_xQueueGenericCreate
+		#define xQueueCreateMutex				MPU_xQueueCreateMutex
+		#define xQueueGiveMutexRecursive		MPU_xQueueGiveMutexRecursive
+		#define xQueueTakeMutexRecursive		MPU_xQueueTakeMutexRecursive
+		#define xQueueCreateCountingSemaphore	MPU_xQueueCreateCountingSemaphore
+		#define xQueueGenericSend				MPU_xQueueGenericSend
+		#define xQueueAltGenericSend			MPU_xQueueAltGenericSend
+		#define xQueueAltGenericReceive			MPU_xQueueAltGenericReceive
+		#define xQueueGenericReceive			MPU_xQueueGenericReceive
+		#define uxQueueMessagesWaiting			MPU_uxQueueMessagesWaiting
+		#define vQueueDelete					MPU_vQueueDelete
+		#define xQueueGenericReset				MPU_xQueueGenericReset
+		#define xQueueCreateSet					MPU_xQueueCreateSet
+		#define xQueueSelectFromSet				MPU_xQueueSelectFromSet
+		#define xQueueAddToSet					MPU_xQueueAddToSet
+		#define xQueueRemoveFromSet				MPU_xQueueRemoveFromSet
+		#define xQueueGetMutexHolder			MPU_xQueueGetMutexHolder
+		#define xQueueGetMutexHolder			MPU_xQueueGetMutexHolder
+
+		#define pvPortMalloc					MPU_pvPortMalloc
+		#define vPortFree						MPU_vPortFree
+		#define xPortGetFreeHeapSize			MPU_xPortGetFreeHeapSize
+		#define vPortInitialiseBlocks			MPU_vPortInitialiseBlocks
+		#define xPortGetMinimumEverFreeHeapSize	MPU_xPortGetMinimumEverFreeHeapSize
+
+		#if configQUEUE_REGISTRY_SIZE > 0
+			#define vQueueAddToRegistry				MPU_vQueueAddToRegistry
+			#define vQueueUnregisterQueue			MPU_vQueueUnregisterQueue
+		#endif
+
+		#define xTimerCreate					MPU_xTimerCreate
+		#define pvTimerGetTimerID				MPU_pvTimerGetTimerID
+		#define vTimerSetTimerID				MPU_vTimerSetTimerID
+		#define xTimerIsTimerActive				MPU_xTimerIsTimerActive
+		#define xTimerGetTimerDaemonTaskHandle	MPU_xTimerGetTimerDaemonTaskHandle
+		#define xTimerPendFunctionCall			MPU_xTimerPendFunctionCall
+		#define pcTimerGetTimerName				MPU_pcTimerGetTimerName
+		#define xTimerGenericCommand			MPU_xTimerGenericCommand
+
+		#define xEventGroupCreate				MPU_xEventGroupCreate
+		#define xEventGroupWaitBits				MPU_xEventGroupWaitBits
+		#define xEventGroupClearBits			MPU_xEventGroupClearBits
+		#define xEventGroupSetBits				MPU_xEventGroupSetBits
+		#define xEventGroupSync					MPU_xEventGroupSync
+		#define vEventGroupDelete				MPU_vEventGroupDelete
+
+		/* Remove the privileged function macro. */
+		#define PRIVILEGED_FUNCTION
+
+	#else /* MPU_WRAPPERS_INCLUDED_FROM_API_FILE */
+
+		/* Ensure API functions go in the privileged execution section. */
+		#define PRIVILEGED_FUNCTION __attribute__((section("privileged_functions")))
+		#define PRIVILEGED_DATA __attribute__((section("privileged_data")))
+
+	#endif /* MPU_WRAPPERS_INCLUDED_FROM_API_FILE */
+
+#else /* portUSING_MPU_WRAPPERS */
+
+	#define PRIVILEGED_FUNCTION
+	#define PRIVILEGED_DATA
+	#define portUSING_MPU_WRAPPERS 0
+
+#endif /* portUSING_MPU_WRAPPERS */
+
+
+#endif /* MPU_WRAPPERS_H */
+

Source/include/murax.h

@@ -0,0 +1,17 @@
+#ifndef __MURAX_H__
+#define __MURAX_H__
+
+#include "timer.h"
+#include "prescaler.h"
+#include "interrupt.h"
+#include "gpio.h"
+#include "uart.h"
+
+#define GPIO_A    ((Gpio_Reg*)(0xF0000000))
+#define TIMER_PRESCALER ((Prescaler_Reg*)0xF0020000)
+#define TIMER_INTERRUPT ((InterruptCtrl_Reg*)0xF0020010)
+#define TIMER_A ((Timer_Reg*)0xF0020040)
+#define TIMER_B ((Timer_Reg*)0xF0020050)
+#define UART      ((Uart_Reg*)(0xF0010000))
+
+#endif /* __MURAX_H__ */

Source/include/portable.h

@@ -0,0 +1,207 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+/*-----------------------------------------------------------
+ * Portable layer API.  Each function must be defined for each port.
+ *----------------------------------------------------------*/
+
+#ifndef PORTABLE_H
+#define PORTABLE_H
+
+/* Each FreeRTOS port has a unique portmacro.h header file.  Originally a
+pre-processor definition was used to ensure the pre-processor found the correct
+portmacro.h file for the port being used.  That scheme was deprecated in favour
+of setting the compiler's include path such that it found the correct
+portmacro.h file - removing the need for the constant and allowing the
+portmacro.h file to be located anywhere in relation to the port being used.
+Purely for reasons of backward compatibility the old method is still valid, but
+to make it clear that new projects should not use it, support for the port
+specific constants has been moved into the deprecated_definitions.h header
+file. */
+#include "deprecated_definitions.h"
+
+/* If portENTER_CRITICAL is not defined then including deprecated_definitions.h
+did not result in a portmacro.h header file being included - and it should be
+included here.  In this case the path to the correct portmacro.h header file
+must be set in the compiler's include path. */
+#ifndef portENTER_CRITICAL
+	#include "portmacro.h"
+#endif
+
+#if portBYTE_ALIGNMENT == 32
+	#define portBYTE_ALIGNMENT_MASK ( 0x001f )
+#endif
+
+#if portBYTE_ALIGNMENT == 16
+	#define portBYTE_ALIGNMENT_MASK ( 0x000f )
+#endif
+
+#if portBYTE_ALIGNMENT == 8
+	#define portBYTE_ALIGNMENT_MASK ( 0x0007 )
+#endif
+
+#if portBYTE_ALIGNMENT == 4
+	#define portBYTE_ALIGNMENT_MASK	( 0x0003 )
+#endif
+
+#if portBYTE_ALIGNMENT == 2
+	#define portBYTE_ALIGNMENT_MASK	( 0x0001 )
+#endif
+
+#if portBYTE_ALIGNMENT == 1
+	#define portBYTE_ALIGNMENT_MASK	( 0x0000 )
+#endif
+
+#ifndef portBYTE_ALIGNMENT_MASK
+	#error "Invalid portBYTE_ALIGNMENT definition"
+#endif
+
+#ifndef portNUM_CONFIGURABLE_REGIONS
+	#define portNUM_CONFIGURABLE_REGIONS 1
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "mpu_wrappers.h"
+
+/*
+ * Setup the stack of a new task so it is ready to be placed under the
+ * scheduler control.  The registers have to be placed on the stack in
+ * the order that the port expects to find them.
+ *
+ */
+#if( portUSING_MPU_WRAPPERS == 1 )
+	StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters, BaseType_t xRunPrivileged ) PRIVILEGED_FUNCTION;
+#else
+	StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters ) PRIVILEGED_FUNCTION;
+#endif
+
+/* Used by heap_5.c. */
+typedef struct HeapRegion
+{
+	uint8_t *pucStartAddress;
+	size_t xSizeInBytes;
+} HeapRegion_t;
+
+/*
+ * Used to define multiple heap regions for use by heap_5.c.  This function
+ * must be called before any calls to pvPortMalloc() - not creating a task,
+ * queue, semaphore, mutex, software timer, event group, etc. will result in
+ * pvPortMalloc being called.
+ *
+ * pxHeapRegions passes in an array of HeapRegion_t structures - each of which
+ * defines a region of memory that can be used as the heap.  The array is
+ * terminated by a HeapRegions_t structure that has a size of 0.  The region
+ * with the lowest start address must appear first in the array.
+ */
+void vPortDefineHeapRegions( const HeapRegion_t * const pxHeapRegions ) PRIVILEGED_FUNCTION;
+
+
+/*
+ * Map to the memory management routines required for the port.
+ */
+void *pvPortMalloc( size_t xSize ) PRIVILEGED_FUNCTION;
+void vPortFree( void *pv ) PRIVILEGED_FUNCTION;
+void vPortInitialiseBlocks( void ) PRIVILEGED_FUNCTION;
+size_t xPortGetFreeHeapSize( void ) PRIVILEGED_FUNCTION;
+size_t xPortGetMinimumEverFreeHeapSize( void ) PRIVILEGED_FUNCTION;
+
+/*
+ * Setup the hardware ready for the scheduler to take control.  This generally
+ * sets up a tick interrupt and sets timers for the correct tick frequency.
+ */
+BaseType_t xPortStartScheduler( void ) PRIVILEGED_FUNCTION;
+
+/*
+ * Undo any hardware/ISR setup that was performed by xPortStartScheduler() so
+ * the hardware is left in its original condition after the scheduler stops
+ * executing.
+ */
+void vPortEndScheduler( void ) PRIVILEGED_FUNCTION;
+
+/*
+ * The structures and methods of manipulating the MPU are contained within the
+ * port layer.
+ *
+ * Fills the xMPUSettings structure with the memory region information
+ * contained in xRegions.
+ */
+#if( portUSING_MPU_WRAPPERS == 1 )
+	struct xMEMORY_REGION;
+	void vPortStoreTaskMPUSettings( xMPU_SETTINGS *xMPUSettings, const struct xMEMORY_REGION * const xRegions, StackType_t *pxBottomOfStack, uint16_t usStackDepth ) PRIVILEGED_FUNCTION;
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PORTABLE_H */
+

Source/include/prescaler.h

@@ -0,0 +1,16 @@
+#ifndef PRESCALERCTRL_H_
+#define PRESCALERCTRL_H_
+
+#include <stdint.h>
+
+
+typedef struct
+{
+  volatile uint32_t LIMIT;
+} Prescaler_Reg;
+
+static void prescaler_init(Prescaler_Reg* reg){
+
+}
+
+#endif /* PRESCALERCTRL_H_ */

Source/include/projdefs.h

@@ -0,0 +1,156 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#ifndef PROJDEFS_H
+#define PROJDEFS_H
+
+/*
+ * Defines the prototype to which task functions must conform.  Defined in this
+ * file to ensure the type is known before portable.h is included.
+ */
+typedef void (*TaskFunction_t)( void * );
+
+/* Converts a time in milliseconds to a time in ticks. */
+#define pdMS_TO_TICKS( xTimeInMs ) ( ( TickType_t ) ( ( ( TickType_t ) ( xTimeInMs ) * ( TickType_t ) configTICK_RATE_HZ ) / ( TickType_t ) 1000 ) )
+
+#define pdFALSE			( ( BaseType_t ) 0 )
+#define pdTRUE			( ( BaseType_t ) 1 )
+
+#define pdPASS			( pdTRUE )
+#define pdFAIL			( pdFALSE )
+#define errQUEUE_EMPTY	( ( BaseType_t ) 0 )
+#define errQUEUE_FULL	( ( BaseType_t ) 0 )
+
+/* FreeRTOS error definitions. */
+#define errCOULD_NOT_ALLOCATE_REQUIRED_MEMORY	( -1 )
+#define errQUEUE_BLOCKED						( -4 )
+#define errQUEUE_YIELD							( -5 )
+
+/* Macros used for basic data corruption checks. */
+#ifndef configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES
+	#define configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES 0
+#endif
+
+#if( configUSE_16_BIT_TICKS == 1 )
+	#define pdINTEGRITY_CHECK_VALUE 0x5a5a
+#else
+	#define pdINTEGRITY_CHECK_VALUE 0x5a5a5a5aUL
+#endif
+
+/* The following errno values are used by FreeRTOS+ components, not FreeRTOS
+itself. */
+#define pdFREERTOS_ERRNO_NONE			0	/* No errors */
+#define	pdFREERTOS_ERRNO_ENOENT			2	/* No such file or directory */
+#define	pdFREERTOS_ERRNO_EIO			5	/* I/O error */
+#define	pdFREERTOS_ERRNO_ENXIO			6	/* No such device or address */
+#define	pdFREERTOS_ERRNO_EBADF			9	/* Bad file number */
+#define	pdFREERTOS_ERRNO_EAGAIN			11	/* No more processes */
+#define	pdFREERTOS_ERRNO_EWOULDBLOCK	11	/* Operation would block */
+#define	pdFREERTOS_ERRNO_ENOMEM			12	/* Not enough memory */
+#define	pdFREERTOS_ERRNO_EACCES			13	/* Permission denied */
+#define	pdFREERTOS_ERRNO_EFAULT			14	/* Bad address */
+#define	pdFREERTOS_ERRNO_EBUSY			16	/* Mount device busy */
+#define	pdFREERTOS_ERRNO_EEXIST			17	/* File exists */
+#define	pdFREERTOS_ERRNO_EXDEV			18	/* Cross-device link */
+#define	pdFREERTOS_ERRNO_ENODEV			19	/* No such device */
+#define	pdFREERTOS_ERRNO_ENOTDIR		20	/* Not a directory */
+#define	pdFREERTOS_ERRNO_EISDIR			21	/* Is a directory */
+#define	pdFREERTOS_ERRNO_EINVAL			22	/* Invalid argument */
+#define	pdFREERTOS_ERRNO_ENOSPC			28	/* No space left on device */
+#define	pdFREERTOS_ERRNO_ESPIPE			29	/* Illegal seek */
+#define	pdFREERTOS_ERRNO_EROFS			30	/* Read only file system */
+#define	pdFREERTOS_ERRNO_EUNATCH		42	/* Protocol driver not attached */
+#define	pdFREERTOS_ERRNO_EBADE			50	/* Invalid exchange */
+#define	pdFREERTOS_ERRNO_EFTYPE			79	/* Inappropriate file type or format */
+#define	pdFREERTOS_ERRNO_ENMFILE		89	/* No more files */
+#define	pdFREERTOS_ERRNO_ENOTEMPTY		90	/* Directory not empty */
+#define	pdFREERTOS_ERRNO_ENAMETOOLONG 	91	/* File or path name too long */
+#define	pdFREERTOS_ERRNO_EOPNOTSUPP		95	/* Operation not supported on transport endpoint */
+#define	pdFREERTOS_ERRNO_ENOBUFS		105	/* No buffer space available */
+#define	pdFREERTOS_ERRNO_ENOPROTOOPT	109	/* Protocol not available */
+#define	pdFREERTOS_ERRNO_EADDRINUSE		112	/* Address already in use */
+#define	pdFREERTOS_ERRNO_ETIMEDOUT		116	/* Connection timed out */
+#define	pdFREERTOS_ERRNO_EINPROGRESS	119	/* Connection already in progress */
+#define	pdFREERTOS_ERRNO_EALREADY		120	/* Socket already connected */
+#define	pdFREERTOS_ERRNO_EADDRNOTAVAIL 	125	/* Address not available */
+#define	pdFREERTOS_ERRNO_EISCONN		127	/* Socket is already connected */
+#define	pdFREERTOS_ERRNO_ENOTCONN		128	/* Socket is not connected */
+#define	pdFREERTOS_ERRNO_ENOMEDIUM		135	/* No medium inserted */
+#define	pdFREERTOS_ERRNO_EILSEQ			138	/* An invalid UTF-16 sequence was encountered. */
+#define	pdFREERTOS_ERRNO_ECANCELED		140	/* Operation canceled. */
+
+/* The following endian values are used by FreeRTOS+ components, not FreeRTOS
+itself. */
+#define pdFREERTOS_LITTLE_ENDIAN	0
+#define pdFREERTOS_BIG_ENDIAN		1
+
+#endif /* PROJDEFS_H */
+
+
+

Source/include/semphr.h

@@ -0,0 +1,844 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#ifndef SEMAPHORE_H
+#define SEMAPHORE_H
+
+#ifndef INC_FREERTOS_H
+	#error "include FreeRTOS.h" must appear in source files before "include semphr.h"
+#endif
+
+#include "queue.h"
+
+typedef QueueHandle_t SemaphoreHandle_t;
+
+#define semBINARY_SEMAPHORE_QUEUE_LENGTH	( ( uint8_t ) 1U )
+#define semSEMAPHORE_QUEUE_ITEM_LENGTH		( ( uint8_t ) 0U )
+#define semGIVE_BLOCK_TIME					( ( TickType_t ) 0U )
+
+
+/**
+ * semphr. h
+ * <pre>vSemaphoreCreateBinary( SemaphoreHandle_t xSemaphore )</pre>
+ *
+ * This old vSemaphoreCreateBinary() macro is now deprecated in favour of the
+ * xSemaphoreCreateBinary() function.  Note that binary semaphores created using
+ * the vSemaphoreCreateBinary() macro are created in a state such that the
+ * first call to 'take' the semaphore would pass, whereas binary semaphores
+ * created using xSemaphoreCreateBinary() are created in a state such that the
+ * the semaphore must first be 'given' before it can be 'taken'.
+ *
+ * <i>Macro</i> that implements a semaphore by using the existing queue mechanism.
+ * The queue length is 1 as this is a binary semaphore.  The data size is 0
+ * as we don't want to actually store any data - we just want to know if the
+ * queue is empty or full.
+ *
+ * This type of semaphore can be used for pure synchronisation between tasks or
+ * between an interrupt and a task.  The semaphore need not be given back once
+ * obtained, so one task/interrupt can continuously 'give' the semaphore while
+ * another continuously 'takes' the semaphore.  For this reason this type of
+ * semaphore does not use a priority inheritance mechanism.  For an alternative
+ * that does use priority inheritance see xSemaphoreCreateMutex().
+ *
+ * @param xSemaphore Handle to the created semaphore.  Should be of type SemaphoreHandle_t.
+ *
+ * Example usage:
+ <pre>
+ SemaphoreHandle_t xSemaphore = NULL;
+
+ void vATask( void * pvParameters )
+ {
+    // Semaphore cannot be used before a call to vSemaphoreCreateBinary ().
+    // This is a macro so pass the variable in directly.
+    vSemaphoreCreateBinary( xSemaphore );
+
+    if( xSemaphore != NULL )
+    {
+        // The semaphore was created successfully.
+        // The semaphore can now be used.
+    }
+ }
+ </pre>
+ * \defgroup vSemaphoreCreateBinary vSemaphoreCreateBinary
+ * \ingroup Semaphores
+ */
+#define vSemaphoreCreateBinary( xSemaphore )																							\
+	{																																	\
+		( xSemaphore ) = xQueueGenericCreate( ( UBaseType_t ) 1, semSEMAPHORE_QUEUE_ITEM_LENGTH, queueQUEUE_TYPE_BINARY_SEMAPHORE );	\
+		if( ( xSemaphore ) != NULL )																									\
+		{																																\
+			( void ) xSemaphoreGive( ( xSemaphore ) );																					\
+		}																																\
+	}
+
+/**
+ * semphr. h
+ * <pre>SemaphoreHandle_t xSemaphoreCreateBinary( void )</pre>
+ *
+ * The old vSemaphoreCreateBinary() macro is now deprecated in favour of this
+ * xSemaphoreCreateBinary() function.  Note that binary semaphores created using
+ * the vSemaphoreCreateBinary() macro are created in a state such that the
+ * first call to 'take' the semaphore would pass, whereas binary semaphores
+ * created using xSemaphoreCreateBinary() are created in a state such that the
+ * the semaphore must first be 'given' before it can be 'taken'.
+ *
+ * Function that creates a semaphore by using the existing queue mechanism.
+ * The queue length is 1 as this is a binary semaphore.  The data size is 0
+ * as nothing is actually stored - all that is important is whether the queue is
+ * empty or full (the binary semaphore is available or not).
+ *
+ * This type of semaphore can be used for pure synchronisation between tasks or
+ * between an interrupt and a task.  The semaphore need not be given back once
+ * obtained, so one task/interrupt can continuously 'give' the semaphore while
+ * another continuously 'takes' the semaphore.  For this reason this type of
+ * semaphore does not use a priority inheritance mechanism.  For an alternative
+ * that does use priority inheritance see xSemaphoreCreateMutex().
+ *
+ * @return Handle to the created semaphore.
+ *
+ * Example usage:
+ <pre>
+ SemaphoreHandle_t xSemaphore = NULL;
+
+ void vATask( void * pvParameters )
+ {
+    // Semaphore cannot be used before a call to vSemaphoreCreateBinary ().
+    // This is a macro so pass the variable in directly.
+    xSemaphore = xSemaphoreCreateBinary();
+
+    if( xSemaphore != NULL )
+    {
+        // The semaphore was created successfully.
+        // The semaphore can now be used.
+    }
+ }
+ </pre>
+ * \defgroup vSemaphoreCreateBinary vSemaphoreCreateBinary
+ * \ingroup Semaphores
+ */
+#define xSemaphoreCreateBinary() xQueueGenericCreate( ( UBaseType_t ) 1, semSEMAPHORE_QUEUE_ITEM_LENGTH, queueQUEUE_TYPE_BINARY_SEMAPHORE )
+
+/**
+ * semphr. h
+ * <pre>xSemaphoreTake(
+ *                   SemaphoreHandle_t xSemaphore,
+ *                   TickType_t xBlockTime
+ *               )</pre>
+ *
+ * <i>Macro</i> to obtain a semaphore.  The semaphore must have previously been
+ * created with a call to vSemaphoreCreateBinary(), xSemaphoreCreateMutex() or
+ * xSemaphoreCreateCounting().
+ *
+ * @param xSemaphore A handle to the semaphore being taken - obtained when
+ * the semaphore was created.
+ *
+ * @param xBlockTime The time in ticks to wait for the semaphore to become
+ * available.  The macro portTICK_PERIOD_MS can be used to convert this to a
+ * real time.  A block time of zero can be used to poll the semaphore.  A block
+ * time of portMAX_DELAY can be used to block indefinitely (provided
+ * INCLUDE_vTaskSuspend is set to 1 in FreeRTOSConfig.h).
+ *
+ * @return pdTRUE if the semaphore was obtained.  pdFALSE
+ * if xBlockTime expired without the semaphore becoming available.
+ *
+ * Example usage:
+ <pre>
+ SemaphoreHandle_t xSemaphore = NULL;
+
+ // A task that creates a semaphore.
+ void vATask( void * pvParameters )
+ {
+    // Create the semaphore to guard a shared resource.
+    vSemaphoreCreateBinary( xSemaphore );
+ }
+
+ // A task that uses the semaphore.
+ void vAnotherTask( void * pvParameters )
+ {
+    // ... Do other things.
+
+    if( xSemaphore != NULL )
+    {
+        // See if we can obtain the semaphore.  If the semaphore is not available
+        // wait 10 ticks to see if it becomes free.
+        if( xSemaphoreTake( xSemaphore, ( TickType_t ) 10 ) == pdTRUE )
+        {
+            // We were able to obtain the semaphore and can now access the
+            // shared resource.
+
+            // ...
+
+            // We have finished accessing the shared resource.  Release the
+            // semaphore.
+            xSemaphoreGive( xSemaphore );
+        }
+        else
+        {
+            // We could not obtain the semaphore and can therefore not access
+            // the shared resource safely.
+        }
+    }
+ }
+ </pre>
+ * \defgroup xSemaphoreTake xSemaphoreTake
+ * \ingroup Semaphores
+ */
+#define xSemaphoreTake( xSemaphore, xBlockTime )		xQueueGenericReceive( ( QueueHandle_t ) ( xSemaphore ), NULL, ( xBlockTime ), pdFALSE )
+
+/**
+ * semphr. h
+ * xSemaphoreTakeRecursive(
+ *                          SemaphoreHandle_t xMutex,
+ *                          TickType_t xBlockTime
+ *                        )
+ *
+ * <i>Macro</i> to recursively obtain, or 'take', a mutex type semaphore.
+ * The mutex must have previously been created using a call to
+ * xSemaphoreCreateRecursiveMutex();
+ *
+ * configUSE_RECURSIVE_MUTEXES must be set to 1 in FreeRTOSConfig.h for this
+ * macro to be available.
+ *
+ * This macro must not be used on mutexes created using xSemaphoreCreateMutex().
+ *
+ * A mutex used recursively can be 'taken' repeatedly by the owner. The mutex
+ * doesn't become available again until the owner has called
+ * xSemaphoreGiveRecursive() for each successful 'take' request.  For example,
+ * if a task successfully 'takes' the same mutex 5 times then the mutex will
+ * not be available to any other task until it has also  'given' the mutex back
+ * exactly five times.
+ *
+ * @param xMutex A handle to the mutex being obtained.  This is the
+ * handle returned by xSemaphoreCreateRecursiveMutex();
+ *
+ * @param xBlockTime The time in ticks to wait for the semaphore to become
+ * available.  The macro portTICK_PERIOD_MS can be used to convert this to a
+ * real time.  A block time of zero can be used to poll the semaphore.  If
+ * the task already owns the semaphore then xSemaphoreTakeRecursive() will
+ * return immediately no matter what the value of xBlockTime.
+ *
+ * @return pdTRUE if the semaphore was obtained.  pdFALSE if xBlockTime
+ * expired without the semaphore becoming available.
+ *
+ * Example usage:
+ <pre>
+ SemaphoreHandle_t xMutex = NULL;
+
+ // A task that creates a mutex.
+ void vATask( void * pvParameters )
+ {
+    // Create the mutex to guard a shared resource.
+    xMutex = xSemaphoreCreateRecursiveMutex();
+ }
+
+ // A task that uses the mutex.
+ void vAnotherTask( void * pvParameters )
+ {
+    // ... Do other things.
+
+    if( xMutex != NULL )
+    {
+        // See if we can obtain the mutex.  If the mutex is not available
+        // wait 10 ticks to see if it becomes free.
+        if( xSemaphoreTakeRecursive( xSemaphore, ( TickType_t ) 10 ) == pdTRUE )
+        {
+            // We were able to obtain the mutex and can now access the
+            // shared resource.
+
+            // ...
+            // For some reason due to the nature of the code further calls to
+			// xSemaphoreTakeRecursive() are made on the same mutex.  In real
+			// code these would not be just sequential calls as this would make
+			// no sense.  Instead the calls are likely to be buried inside
+			// a more complex call structure.
+            xSemaphoreTakeRecursive( xMutex, ( TickType_t ) 10 );
+            xSemaphoreTakeRecursive( xMutex, ( TickType_t ) 10 );
+
+            // The mutex has now been 'taken' three times, so will not be
+			// available to another task until it has also been given back
+			// three times.  Again it is unlikely that real code would have
+			// these calls sequentially, but instead buried in a more complex
+			// call structure.  This is just for illustrative purposes.
+            xSemaphoreGiveRecursive( xMutex );
+			xSemaphoreGiveRecursive( xMutex );
+			xSemaphoreGiveRecursive( xMutex );
+
+			// Now the mutex can be taken by other tasks.
+        }
+        else
+        {
+            // We could not obtain the mutex and can therefore not access
+            // the shared resource safely.
+        }
+    }
+ }
+ </pre>
+ * \defgroup xSemaphoreTakeRecursive xSemaphoreTakeRecursive
+ * \ingroup Semaphores
+ */
+#define xSemaphoreTakeRecursive( xMutex, xBlockTime )	xQueueTakeMutexRecursive( ( xMutex ), ( xBlockTime ) )
+
+
+/*
+ * xSemaphoreAltTake() is an alternative version of xSemaphoreTake().
+ *
+ * The source code that implements the alternative (Alt) API is much
+ * simpler	because it executes everything from within a critical section.
+ * This is	the approach taken by many other RTOSes, but FreeRTOS.org has the
+ * preferred fully featured API too.  The fully featured API has more
+ * complex	code that takes longer to execute, but makes much less use of
+ * critical sections.  Therefore the alternative API sacrifices interrupt
+ * responsiveness to gain execution speed, whereas the fully featured API
+ * sacrifices execution speed to ensure better interrupt responsiveness.
+ */
+#define xSemaphoreAltTake( xSemaphore, xBlockTime )		xQueueAltGenericReceive( ( QueueHandle_t ) ( xSemaphore ), NULL, ( xBlockTime ), pdFALSE )
+
+/**
+ * semphr. h
+ * <pre>xSemaphoreGive( SemaphoreHandle_t xSemaphore )</pre>
+ *
+ * <i>Macro</i> to release a semaphore.  The semaphore must have previously been
+ * created with a call to vSemaphoreCreateBinary(), xSemaphoreCreateMutex() or
+ * xSemaphoreCreateCounting(). and obtained using sSemaphoreTake().
+ *
+ * This macro must not be used from an ISR.  See xSemaphoreGiveFromISR () for
+ * an alternative which can be used from an ISR.
+ *
+ * This macro must also not be used on semaphores created using
+ * xSemaphoreCreateRecursiveMutex().
+ *
+ * @param xSemaphore A handle to the semaphore being released.  This is the
+ * handle returned when the semaphore was created.
+ *
+ * @return pdTRUE if the semaphore was released.  pdFALSE if an error occurred.
+ * Semaphores are implemented using queues.  An error can occur if there is
+ * no space on the queue to post a message - indicating that the
+ * semaphore was not first obtained correctly.
+ *
+ * Example usage:
+ <pre>
+ SemaphoreHandle_t xSemaphore = NULL;
+
+ void vATask( void * pvParameters )
+ {
+    // Create the semaphore to guard a shared resource.
+    vSemaphoreCreateBinary( xSemaphore );
+
+    if( xSemaphore != NULL )
+    {
+        if( xSemaphoreGive( xSemaphore ) != pdTRUE )
+        {
+            // We would expect this call to fail because we cannot give
+            // a semaphore without first "taking" it!
+        }
+
+        // Obtain the semaphore - don't block if the semaphore is not
+        // immediately available.
+        if( xSemaphoreTake( xSemaphore, ( TickType_t ) 0 ) )
+        {
+            // We now have the semaphore and can access the shared resource.
+
+            // ...
+
+            // We have finished accessing the shared resource so can free the
+            // semaphore.
+            if( xSemaphoreGive( xSemaphore ) != pdTRUE )
+            {
+                // We would not expect this call to fail because we must have
+                // obtained the semaphore to get here.
+            }
+        }
+    }
+ }
+ </pre>
+ * \defgroup xSemaphoreGive xSemaphoreGive
+ * \ingroup Semaphores
+ */
+#define xSemaphoreGive( xSemaphore )		xQueueGenericSend( ( QueueHandle_t ) ( xSemaphore ), NULL, semGIVE_BLOCK_TIME, queueSEND_TO_BACK )
+
+/**
+ * semphr. h
+ * <pre>xSemaphoreGiveRecursive( SemaphoreHandle_t xMutex )</pre>
+ *
+ * <i>Macro</i> to recursively release, or 'give', a mutex type semaphore.
+ * The mutex must have previously been created using a call to
+ * xSemaphoreCreateRecursiveMutex();
+ *
+ * configUSE_RECURSIVE_MUTEXES must be set to 1 in FreeRTOSConfig.h for this
+ * macro to be available.
+ *
+ * This macro must not be used on mutexes created using xSemaphoreCreateMutex().
+ *
+ * A mutex used recursively can be 'taken' repeatedly by the owner. The mutex
+ * doesn't become available again until the owner has called
+ * xSemaphoreGiveRecursive() for each successful 'take' request.  For example,
+ * if a task successfully 'takes' the same mutex 5 times then the mutex will
+ * not be available to any other task until it has also  'given' the mutex back
+ * exactly five times.
+ *
+ * @param xMutex A handle to the mutex being released, or 'given'.  This is the
+ * handle returned by xSemaphoreCreateMutex();
+ *
+ * @return pdTRUE if the semaphore was given.
+ *
+ * Example usage:
+ <pre>
+ SemaphoreHandle_t xMutex = NULL;
+
+ // A task that creates a mutex.
+ void vATask( void * pvParameters )
+ {
+    // Create the mutex to guard a shared resource.
+    xMutex = xSemaphoreCreateRecursiveMutex();
+ }
+
+ // A task that uses the mutex.
+ void vAnotherTask( void * pvParameters )
+ {
+    // ... Do other things.
+
+    if( xMutex != NULL )
+    {
+        // See if we can obtain the mutex.  If the mutex is not available
+        // wait 10 ticks to see if it becomes free.
+        if( xSemaphoreTakeRecursive( xMutex, ( TickType_t ) 10 ) == pdTRUE )
+        {
+            // We were able to obtain the mutex and can now access the
+            // shared resource.
+
+            // ...
+            // For some reason due to the nature of the code further calls to
+			// xSemaphoreTakeRecursive() are made on the same mutex.  In real
+			// code these would not be just sequential calls as this would make
+			// no sense.  Instead the calls are likely to be buried inside
+			// a more complex call structure.
+            xSemaphoreTakeRecursive( xMutex, ( TickType_t ) 10 );
+            xSemaphoreTakeRecursive( xMutex, ( TickType_t ) 10 );
+
+            // The mutex has now been 'taken' three times, so will not be
+			// available to another task until it has also been given back
+			// three times.  Again it is unlikely that real code would have
+			// these calls sequentially, it would be more likely that the calls
+			// to xSemaphoreGiveRecursive() would be called as a call stack
+			// unwound.  This is just for demonstrative purposes.
+            xSemaphoreGiveRecursive( xMutex );
+			xSemaphoreGiveRecursive( xMutex );
+			xSemaphoreGiveRecursive( xMutex );
+
+			// Now the mutex can be taken by other tasks.
+        }
+        else
+        {
+            // We could not obtain the mutex and can therefore not access
+            // the shared resource safely.
+        }
+    }
+ }
+ </pre>
+ * \defgroup xSemaphoreGiveRecursive xSemaphoreGiveRecursive
+ * \ingroup Semaphores
+ */
+#define xSemaphoreGiveRecursive( xMutex )	xQueueGiveMutexRecursive( ( xMutex ) )
+
+/*
+ * xSemaphoreAltGive() is an alternative version of xSemaphoreGive().
+ *
+ * The source code that implements the alternative (Alt) API is much
+ * simpler	because it executes everything from within a critical section.
+ * This is	the approach taken by many other RTOSes, but FreeRTOS.org has the
+ * preferred fully featured API too.  The fully featured API has more
+ * complex	code that takes longer to execute, but makes much less use of
+ * critical sections.  Therefore the alternative API sacrifices interrupt
+ * responsiveness to gain execution speed, whereas the fully featured API
+ * sacrifices execution speed to ensure better interrupt responsiveness.
+ */
+#define xSemaphoreAltGive( xSemaphore )		xQueueAltGenericSend( ( QueueHandle_t ) ( xSemaphore ), NULL, semGIVE_BLOCK_TIME, queueSEND_TO_BACK )
+
+/**
+ * semphr. h
+ * <pre>
+ xSemaphoreGiveFromISR(
+                          SemaphoreHandle_t xSemaphore,
+                          BaseType_t *pxHigherPriorityTaskWoken
+                      )</pre>
+ *
+ * <i>Macro</i> to  release a semaphore.  The semaphore must have previously been
+ * created with a call to vSemaphoreCreateBinary() or xSemaphoreCreateCounting().
+ *
+ * Mutex type semaphores (those created using a call to xSemaphoreCreateMutex())
+ * must not be used with this macro.
+ *
+ * This macro can be used from an ISR.
+ *
+ * @param xSemaphore A handle to the semaphore being released.  This is the
+ * handle returned when the semaphore was created.
+ *
+ * @param pxHigherPriorityTaskWoken xSemaphoreGiveFromISR() will set
+ * *pxHigherPriorityTaskWoken to pdTRUE if giving the semaphore caused a task
+ * to unblock, and the unblocked task has a priority higher than the currently
+ * running task.  If xSemaphoreGiveFromISR() sets this value to pdTRUE then
+ * a context switch should be requested before the interrupt is exited.
+ *
+ * @return pdTRUE if the semaphore was successfully given, otherwise errQUEUE_FULL.
+ *
+ * Example usage:
+ <pre>
+ \#define LONG_TIME 0xffff
+ \#define TICKS_TO_WAIT	10
+ SemaphoreHandle_t xSemaphore = NULL;
+
+ // Repetitive task.
+ void vATask( void * pvParameters )
+ {
+    for( ;; )
+    {
+        // We want this task to run every 10 ticks of a timer.  The semaphore
+        // was created before this task was started.
+
+        // Block waiting for the semaphore to become available.
+        if( xSemaphoreTake( xSemaphore, LONG_TIME ) == pdTRUE )
+        {
+            // It is time to execute.
+
+            // ...
+
+            // We have finished our task.  Return to the top of the loop where
+            // we will block on the semaphore until it is time to execute
+            // again.  Note when using the semaphore for synchronisation with an
+			// ISR in this manner there is no need to 'give' the semaphore back.
+        }
+    }
+ }
+
+ // Timer ISR
+ void vTimerISR( void * pvParameters )
+ {
+ static uint8_t ucLocalTickCount = 0;
+ static BaseType_t xHigherPriorityTaskWoken;
+
+    // A timer tick has occurred.
+
+    // ... Do other time functions.
+
+    // Is it time for vATask () to run?
+	xHigherPriorityTaskWoken = pdFALSE;
+    ucLocalTickCount++;
+    if( ucLocalTickCount >= TICKS_TO_WAIT )
+    {
+        // Unblock the task by releasing the semaphore.
+        xSemaphoreGiveFromISR( xSemaphore, &xHigherPriorityTaskWoken );
+
+        // Reset the count so we release the semaphore again in 10 ticks time.
+        ucLocalTickCount = 0;
+    }
+
+    if( xHigherPriorityTaskWoken != pdFALSE )
+    {
+        // We can force a context switch here.  Context switching from an
+        // ISR uses port specific syntax.  Check the demo task for your port
+        // to find the syntax required.
+    }
+ }
+ </pre>
+ * \defgroup xSemaphoreGiveFromISR xSemaphoreGiveFromISR
+ * \ingroup Semaphores
+ */
+#define xSemaphoreGiveFromISR( xSemaphore, pxHigherPriorityTaskWoken )	xQueueGiveFromISR( ( QueueHandle_t ) ( xSemaphore ), ( pxHigherPriorityTaskWoken ) )
+
+/**
+ * semphr. h
+ * <pre>
+ xSemaphoreTakeFromISR(
+                          SemaphoreHandle_t xSemaphore,
+                          BaseType_t *pxHigherPriorityTaskWoken
+                      )</pre>
+ *
+ * <i>Macro</i> to  take a semaphore from an ISR.  The semaphore must have
+ * previously been created with a call to vSemaphoreCreateBinary() or
+ * xSemaphoreCreateCounting().
+ *
+ * Mutex type semaphores (those created using a call to xSemaphoreCreateMutex())
+ * must not be used with this macro.
+ *
+ * This macro can be used from an ISR, however taking a semaphore from an ISR
+ * is not a common operation.  It is likely to only be useful when taking a
+ * counting semaphore when an interrupt is obtaining an object from a resource
+ * pool (when the semaphore count indicates the number of resources available).
+ *
+ * @param xSemaphore A handle to the semaphore being taken.  This is the
+ * handle returned when the semaphore was created.
+ *
+ * @param pxHigherPriorityTaskWoken xSemaphoreTakeFromISR() will set
+ * *pxHigherPriorityTaskWoken to pdTRUE if taking the semaphore caused a task
+ * to unblock, and the unblocked task has a priority higher than the currently
+ * running task.  If xSemaphoreTakeFromISR() sets this value to pdTRUE then
+ * a context switch should be requested before the interrupt is exited.
+ *
+ * @return pdTRUE if the semaphore was successfully taken, otherwise
+ * pdFALSE
+ */
+#define xSemaphoreTakeFromISR( xSemaphore, pxHigherPriorityTaskWoken )	xQueueReceiveFromISR( ( QueueHandle_t ) ( xSemaphore ), NULL, ( pxHigherPriorityTaskWoken ) )
+
+/**
+ * semphr. h
+ * <pre>SemaphoreHandle_t xSemaphoreCreateMutex( void )</pre>
+ *
+ * <i>Macro</i> that implements a mutex semaphore by using the existing queue
+ * mechanism.
+ *
+ * Mutexes created using this macro can be accessed using the xSemaphoreTake()
+ * and xSemaphoreGive() macros.  The xSemaphoreTakeRecursive() and
+ * xSemaphoreGiveRecursive() macros should not be used.
+ *
+ * This type of semaphore uses a priority inheritance mechanism so a task
+ * 'taking' a semaphore MUST ALWAYS 'give' the semaphore back once the
+ * semaphore it is no longer required.
+ *
+ * Mutex type semaphores cannot be used from within interrupt service routines.
+ *
+ * See vSemaphoreCreateBinary() for an alternative implementation that can be
+ * used for pure synchronisation (where one task or interrupt always 'gives' the
+ * semaphore and another always 'takes' the semaphore) and from within interrupt
+ * service routines.
+ *
+ * @return xSemaphore Handle to the created mutex semaphore.  Should be of type
+ *		SemaphoreHandle_t.
+ *
+ * Example usage:
+ <pre>
+ SemaphoreHandle_t xSemaphore;
+
+ void vATask( void * pvParameters )
+ {
+    // Semaphore cannot be used before a call to xSemaphoreCreateMutex().
+    // This is a macro so pass the variable in directly.
+    xSemaphore = xSemaphoreCreateMutex();
+
+    if( xSemaphore != NULL )
+    {
+        // The semaphore was created successfully.
+        // The semaphore can now be used.
+    }
+ }
+ </pre>
+ * \defgroup vSemaphoreCreateMutex vSemaphoreCreateMutex
+ * \ingroup Semaphores
+ */
+#define xSemaphoreCreateMutex() xQueueCreateMutex( queueQUEUE_TYPE_MUTEX )
+
+
+/**
+ * semphr. h
+ * <pre>SemaphoreHandle_t xSemaphoreCreateRecursiveMutex( void )</pre>
+ *
+ * <i>Macro</i> that implements a recursive mutex by using the existing queue
+ * mechanism.
+ *
+ * Mutexes created using this macro can be accessed using the
+ * xSemaphoreTakeRecursive() and xSemaphoreGiveRecursive() macros.  The
+ * xSemaphoreTake() and xSemaphoreGive() macros should not be used.
+ *
+ * A mutex used recursively can be 'taken' repeatedly by the owner. The mutex
+ * doesn't become available again until the owner has called
+ * xSemaphoreGiveRecursive() for each successful 'take' request.  For example,
+ * if a task successfully 'takes' the same mutex 5 times then the mutex will
+ * not be available to any other task until it has also  'given' the mutex back
+ * exactly five times.
+ *
+ * This type of semaphore uses a priority inheritance mechanism so a task
+ * 'taking' a semaphore MUST ALWAYS 'give' the semaphore back once the
+ * semaphore it is no longer required.
+ *
+ * Mutex type semaphores cannot be used from within interrupt service routines.
+ *
+ * See vSemaphoreCreateBinary() for an alternative implementation that can be
+ * used for pure synchronisation (where one task or interrupt always 'gives' the
+ * semaphore and another always 'takes' the semaphore) and from within interrupt
+ * service routines.
+ *
+ * @return xSemaphore Handle to the created mutex semaphore.  Should be of type
+ *		SemaphoreHandle_t.
+ *
+ * Example usage:
+ <pre>
+ SemaphoreHandle_t xSemaphore;
+
+ void vATask( void * pvParameters )
+ {
+    // Semaphore cannot be used before a call to xSemaphoreCreateMutex().
+    // This is a macro so pass the variable in directly.
+    xSemaphore = xSemaphoreCreateRecursiveMutex();
+
+    if( xSemaphore != NULL )
+    {
+        // The semaphore was created successfully.
+        // The semaphore can now be used.
+    }
+ }
+ </pre>
+ * \defgroup vSemaphoreCreateMutex vSemaphoreCreateMutex
+ * \ingroup Semaphores
+ */
+#define xSemaphoreCreateRecursiveMutex() xQueueCreateMutex( queueQUEUE_TYPE_RECURSIVE_MUTEX )
+
+/**
+ * semphr. h
+ * <pre>SemaphoreHandle_t xSemaphoreCreateCounting( UBaseType_t uxMaxCount, UBaseType_t uxInitialCount )</pre>
+ *
+ * <i>Macro</i> that creates a counting semaphore by using the existing
+ * queue mechanism.
+ *
+ * Counting semaphores are typically used for two things:
+ *
+ * 1) Counting events.
+ *
+ *    In this usage scenario an event handler will 'give' a semaphore each time
+ *    an event occurs (incrementing the semaphore count value), and a handler
+ *    task will 'take' a semaphore each time it processes an event
+ *    (decrementing the semaphore count value).  The count value is therefore
+ *    the difference between the number of events that have occurred and the
+ *    number that have been processed.  In this case it is desirable for the
+ *    initial count value to be zero.
+ *
+ * 2) Resource management.
+ *
+ *    In this usage scenario the count value indicates the number of resources
+ *    available.  To obtain control of a resource a task must first obtain a
+ *    semaphore - decrementing the semaphore count value.  When the count value
+ *    reaches zero there are no free resources.  When a task finishes with the
+ *    resource it 'gives' the semaphore back - incrementing the semaphore count
+ *    value.  In this case it is desirable for the initial count value to be
+ *    equal to the maximum count value, indicating that all resources are free.
+ *
+ * @param uxMaxCount The maximum count value that can be reached.  When the
+ *        semaphore reaches this value it can no longer be 'given'.
+ *
+ * @param uxInitialCount The count value assigned to the semaphore when it is
+ *        created.
+ *
+ * @return Handle to the created semaphore.  Null if the semaphore could not be
+ *         created.
+ *
+ * Example usage:
+ <pre>
+ SemaphoreHandle_t xSemaphore;
+
+ void vATask( void * pvParameters )
+ {
+ SemaphoreHandle_t xSemaphore = NULL;
+
+    // Semaphore cannot be used before a call to xSemaphoreCreateCounting().
+    // The max value to which the semaphore can count should be 10, and the
+    // initial value assigned to the count should be 0.
+    xSemaphore = xSemaphoreCreateCounting( 10, 0 );
+
+    if( xSemaphore != NULL )
+    {
+        // The semaphore was created successfully.
+        // The semaphore can now be used.
+    }
+ }
+ </pre>
+ * \defgroup xSemaphoreCreateCounting xSemaphoreCreateCounting
+ * \ingroup Semaphores
+ */
+#define xSemaphoreCreateCounting( uxMaxCount, uxInitialCount ) xQueueCreateCountingSemaphore( ( uxMaxCount ), ( uxInitialCount ) )
+
+/**
+ * semphr. h
+ * <pre>void vSemaphoreDelete( SemaphoreHandle_t xSemaphore );</pre>
+ *
+ * Delete a semaphore.  This function must be used with care.  For example,
+ * do not delete a mutex type semaphore if the mutex is held by a task.
+ *
+ * @param xSemaphore A handle to the semaphore to be deleted.
+ *
+ * \defgroup vSemaphoreDelete vSemaphoreDelete
+ * \ingroup Semaphores
+ */
+#define vSemaphoreDelete( xSemaphore ) vQueueDelete( ( QueueHandle_t ) ( xSemaphore ) )
+
+/**
+ * semphr.h
+ * <pre>TaskHandle_t xSemaphoreGetMutexHolder( SemaphoreHandle_t xMutex );</pre>
+ *
+ * If xMutex is indeed a mutex type semaphore, return the current mutex holder.
+ * If xMutex is not a mutex type semaphore, or the mutex is available (not held
+ * by a task), return NULL.
+ *
+ * Note: This is a good way of determining if the calling task is the mutex
+ * holder, but not a good way of determining the identity of the mutex holder as
+ * the holder may change between the function exiting and the returned value
+ * being tested.
+ */
+#define xSemaphoreGetMutexHolder( xSemaphore ) xQueueGetMutexHolder( ( xSemaphore ) )
+
+#endif /* SEMAPHORE_H */
+
+

Source/include/stdint.readme

@@ -0,0 +1,27 @@
+
+#ifndef FREERTOS_STDINT
+#define FREERTOS_STDINT
+
+/*******************************************************************************
+ * THIS IS NOT A FULL stdint.h IMPLEMENTATION - It only contains the definitions
+ * necessary to build the FreeRTOS code.  It is provided to allow FreeRTOS to be
+ * built using compilers that do not provide their own stdint.h definition.
+ *
+ * To use this file:
+ *
+ *    1) Copy this file into the directory that contains your FreeRTOSConfig.h
+ *       header file, as that directory will already be in the compilers include
+ *       path.
+ *
+ *    2) Rename the copied file stdint.h.
+ *
+ */
+
+typedef signed char int8_t;
+typedef unsigned char uint8_t;
+typedef short int16_t;
+typedef unsigned short uint16_t;
+typedef long int32_t;
+typedef unsigned long uint32_t;
+
+#endif /* FREERTOS_STDINT */

Source/include/timer.h

@@ -0,0 +1,20 @@
+#ifndef TIMERCTRL_H_
+#define TIMERCTRL_H_
+
+#include <stdint.h>
+
+
+typedef struct
+{
+  volatile uint32_t CLEARS_TICKS;
+  volatile uint32_t LIMIT;
+  volatile uint32_t VALUE;
+} Timer_Reg;
+
+static void timer_init(Timer_Reg *reg){
+	reg->CLEARS_TICKS  = 0;
+	reg->VALUE = 0;
+}
+
+
+#endif /* TIMERCTRL_H_ */

Source/include/uart.h

@@ -0,0 +1,42 @@
+#ifndef UART_H_
+#define UART_H_
+
+
+typedef struct
+{
+  volatile uint32_t DATA;
+  volatile uint32_t STATUS;
+  volatile uint32_t CLOCK_DIVIDER;
+  volatile uint32_t FRAME_CONFIG;
+} Uart_Reg;
+
+enum UartParity {NONE = 0,EVEN = 1,ODD = 2};
+enum UartStop {ONE = 0,TWO = 1};
+
+typedef struct {
+	uint32_t dataLength;
+	enum UartParity parity;
+	enum UartStop stop;
+	uint32_t clockDivider;
+} Uart_Config;
+
+static uint32_t uart_writeAvailability(Uart_Reg *reg){
+	return (reg->STATUS >> 16) & 0xFF;
+}
+static uint32_t uart_readOccupancy(Uart_Reg *reg){
+	return reg->STATUS >> 24;
+}
+
+static void uart_write(Uart_Reg *reg, uint32_t data){
+	while(uart_writeAvailability(reg) == 0);
+	reg->DATA = data;
+}
+
+static void uart_applyConfig(Uart_Reg *reg, Uart_Config *config){
+	reg->CLOCK_DIVIDER = config->clockDivider;
+	reg->FRAME_CONFIG = ((config->dataLength-1) << 0) | (config->parity << 8) | (config->stop << 16);
+}
+
+#endif /* UART_H_ */
+
+

Source/list.c

@@ -0,0 +1,241 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+
+#include <stdlib.h>
+#include "FreeRTOS.h"
+#include "list.h"
+
+/*-----------------------------------------------------------
+ * PUBLIC LIST API documented in list.h
+ *----------------------------------------------------------*/
+
+
+void vListInitialise( List_t * const pxList )
+{
+	/* The list structure contains a list item which is used to mark the
+	end of the list.  To initialise the list the list end is inserted
+	as the only list entry. */
+	pxList->pxIndex = ( ListItem_t * ) &( pxList->xListEnd );			/*lint !e826 !e740 The mini list structure is used as the list end to save RAM.  This is checked and valid. */
+
+	/* The list end value is the highest possible value in the list to
+	ensure it remains at the end of the list. */
+	pxList->xListEnd.xItemValue = portMAX_DELAY;
+
+	/* The list end next and previous pointers point to itself so we know
+	when the list is empty. */
+	pxList->xListEnd.pxNext = ( ListItem_t * ) &( pxList->xListEnd );	/*lint !e826 !e740 The mini list structure is used as the list end to save RAM.  This is checked and valid. */
+	pxList->xListEnd.pxPrevious = ( ListItem_t * ) &( pxList->xListEnd );/*lint !e826 !e740 The mini list structure is used as the list end to save RAM.  This is checked and valid. */
+
+	pxList->uxNumberOfItems = ( UBaseType_t ) 0U;
+
+	/* Write known values into the list if
+	configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+	listSET_LIST_INTEGRITY_CHECK_1_VALUE( pxList );
+	listSET_LIST_INTEGRITY_CHECK_2_VALUE( pxList );
+}
+/*-----------------------------------------------------------*/
+
+void vListInitialiseItem( ListItem_t * const pxItem )
+{
+	/* Make sure the list item is not recorded as being on a list. */
+	pxItem->pvContainer = NULL;
+
+	/* Write known values into the list item if
+	configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+	listSET_FIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem );
+	listSET_SECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem );
+}
+/*-----------------------------------------------------------*/
+
+void vListInsertEnd( List_t * const pxList, ListItem_t * const pxNewListItem )
+{
+ListItem_t * const pxIndex = pxList->pxIndex;
+
+	/* Only effective when configASSERT() is also defined, these tests may catch
+	the list data structures being overwritten in memory.  They will not catch
+	data errors caused by incorrect configuration or use of FreeRTOS. */
+	listTEST_LIST_INTEGRITY( pxList );
+	listTEST_LIST_ITEM_INTEGRITY( pxNewListItem );
+
+	/* Insert a new list item into pxList, but rather than sort the list,
+	makes the new list item the last item to be removed by a call to
+	listGET_OWNER_OF_NEXT_ENTRY(). */
+	pxNewListItem->pxNext = pxIndex;
+	pxNewListItem->pxPrevious = pxIndex->pxPrevious;
+
+	/* Only used during decision coverage testing. */
+	mtCOVERAGE_TEST_DELAY();
+
+	pxIndex->pxPrevious->pxNext = pxNewListItem;
+	pxIndex->pxPrevious = pxNewListItem;
+
+	/* Remember which list the item is in. */
+	pxNewListItem->pvContainer = ( void * ) pxList;
+
+	( pxList->uxNumberOfItems )++;
+}
+/*-----------------------------------------------------------*/
+
+void vListInsert( List_t * const pxList, ListItem_t * const pxNewListItem )
+{
+ListItem_t *pxIterator;
+const TickType_t xValueOfInsertion = pxNewListItem->xItemValue;
+
+	/* Only effective when configASSERT() is also defined, these tests may catch
+	the list data structures being overwritten in memory.  They will not catch
+	data errors caused by incorrect configuration or use of FreeRTOS. */
+	listTEST_LIST_INTEGRITY( pxList );
+	listTEST_LIST_ITEM_INTEGRITY( pxNewListItem );
+
+	/* Insert the new list item into the list, sorted in xItemValue order.
+
+	If the list already contains a list item with the same item value then the
+	new list item should be placed after it.  This ensures that TCB's which are
+	stored in ready lists (all of which have the same xItemValue value) get a
+	share of the CPU.  However, if the xItemValue is the same as the back marker
+	the iteration loop below will not end.  Therefore the value is checked
+	first, and the algorithm slightly modified if necessary. */
+	if( xValueOfInsertion == portMAX_DELAY )
+	{
+		pxIterator = pxList->xListEnd.pxPrevious;
+	}
+	else
+	{
+		/* *** NOTE ***********************************************************
+		If you find your application is crashing here then likely causes are
+		listed below.  In addition see http://www.freertos.org/FAQHelp.html for
+		more tips, and ensure configASSERT() is defined!
+		http://www.freertos.org/a00110.html#configASSERT
+
+			1) Stack overflow -
+			   see http://www.freertos.org/Stacks-and-stack-overflow-checking.html
+			2) Incorrect interrupt priority assignment, especially on Cortex-M
+			   parts where numerically high priority values denote low actual
+			   interrupt priorities, which can seem counter intuitive.  See
+			   http://www.freertos.org/RTOS-Cortex-M3-M4.html and the definition
+			   of configMAX_SYSCALL_INTERRUPT_PRIORITY on
+			   http://www.freertos.org/a00110.html
+			3) Calling an API function from within a critical section or when
+			   the scheduler is suspended, or calling an API function that does
+			   not end in "FromISR" from an interrupt.
+			4) Using a queue or semaphore before it has been initialised or
+			   before the scheduler has been started (are interrupts firing
+			   before vTaskStartScheduler() has been called?).
+		**********************************************************************/
+
+		for( pxIterator = ( ListItem_t * ) &( pxList->xListEnd ); pxIterator->pxNext->xItemValue <= xValueOfInsertion; pxIterator = pxIterator->pxNext ) /*lint !e826 !e740 The mini list structure is used as the list end to save RAM.  This is checked and valid. */
+		{
+			/* There is nothing to do here, just iterating to the wanted
+			insertion position. */
+		}
+	}
+
+	pxNewListItem->pxNext = pxIterator->pxNext;
+	pxNewListItem->pxNext->pxPrevious = pxNewListItem;
+	pxNewListItem->pxPrevious = pxIterator;
+	pxIterator->pxNext = pxNewListItem;
+
+	/* Remember which list the item is in.  This allows fast removal of the
+	item later. */
+	pxNewListItem->pvContainer = ( void * ) pxList;
+
+	( pxList->uxNumberOfItems )++;
+}
+/*-----------------------------------------------------------*/
+
+UBaseType_t uxListRemove( ListItem_t * const pxItemToRemove )
+{
+/* The list item knows which list it is in.  Obtain the list from the list
+item. */
+List_t * const pxList = ( List_t * ) pxItemToRemove->pvContainer;
+
+	pxItemToRemove->pxNext->pxPrevious = pxItemToRemove->pxPrevious;
+	pxItemToRemove->pxPrevious->pxNext = pxItemToRemove->pxNext;
+
+	/* Only used during decision coverage testing. */
+	mtCOVERAGE_TEST_DELAY();
+
+	/* Make sure the index is left pointing to a valid item. */
+	if( pxList->pxIndex == pxItemToRemove )
+	{
+		pxList->pxIndex = pxItemToRemove->pxPrevious;
+	}
+	else
+	{
+		mtCOVERAGE_TEST_MARKER();
+	}
+
+	pxItemToRemove->pvContainer = NULL;
+	( pxList->uxNumberOfItems )--;
+
+	return pxList->uxNumberOfItems;
+}
+/*-----------------------------------------------------------*/
+

Source/portable/GCC/RISCV/port.c

@@ -0,0 +1,182 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution and was contributed
+    to the project by Technolution B.V. (www.technolution.nl,
+    freertos-riscv@technolution.eu) under the terms of the FreeRTOS
+    contributors license.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+/*-----------------------------------------------------------
+ * Implementation of functions defined in portable.h for the RISC-V port.
+ *----------------------------------------------------------*/
+
+/* Scheduler includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+#include "portmacro.h"
+
+
+/* A variable is used to keep track of the critical section nesting.  This
+variable has to be stored as part of the task context and must be initialised to
+a non zero value to ensure interrupts don't inadvertently become unmasked before
+the scheduler starts.  As it is stored as part of the task context it will
+automatically be set to 0 when the first task is started. */
+static UBaseType_t uxCriticalNesting = 0xaaaaaaaa;
+
+/* Contains context when starting scheduler, save all 31 registers */
+#ifdef __gracefulExit
+BaseType_t xStartContext[31] = {0};
+#endif
+
+/*
+ * Handler for timer interrupt
+ */
+void vPortSysTickHandler( void );
+
+/*
+ * Setup the timer to generate the tick interrupts.
+ */
+void vPortSetupTimer( void );
+
+/*
+ * Set the next interval for the timer
+ */
+static void prvSetNextTimerInterrupt( void );
+
+/*
+ * Used to catch tasks that attempt to return from their implementing function.
+ */
+static void prvTaskExitError( void );
+
+
+/*-----------------------------------------------------------*/
+
+void prvTaskExitError( void )
+{
+	/* A function that implements a task must not exit or attempt to return to
+	its caller as there is nothing to return to.  If a task wants to exit it
+	should instead call vTaskDelete( NULL ).
+
+	Artificially force an assert() to be triggered if configASSERT() is
+	defined, then stop here so application writers can catch the error. */
+	configASSERT( uxCriticalNesting == ~0UL );
+	portDISABLE_INTERRUPTS();
+	for( ;; );
+}
+/*-----------------------------------------------------------*/
+
+/* Clear current interrupt mask and set given mask */
+void vPortClearInterruptMask(int mask)
+{
+	__asm volatile("csrw mie, %0"::"r"(mask));
+}
+/*-----------------------------------------------------------*/
+
+/* Set interrupt mask and return current interrupt enable register */
+int vPortSetInterruptMask(void)
+{
+	int ret;
+	__asm volatile("csrr %0,mie":"=r"(ret));
+	__asm volatile("csrc mie,%0"::"i"(7));
+	return ret;
+}
+/*-----------------------------------------------------------*/
+
+
+/*
+ * See header file for description.
+ */
+StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )
+{
+	/* Simulate the stack frame as it would be created by a context switch
+	interrupt. */
+	register int *tp asm("x3");
+	pxTopOfStack--;
+	*pxTopOfStack = (portSTACK_TYPE)pxCode;			/* Start address */
+	pxTopOfStack -= 22;
+	*pxTopOfStack = (portSTACK_TYPE)pvParameters;	/* Register a0 */
+	pxTopOfStack -= 6;
+	*pxTopOfStack = (portSTACK_TYPE)tp; /* Register thread pointer */
+	pxTopOfStack -= 3;
+	*pxTopOfStack = (portSTACK_TYPE)prvTaskExitError; /* Register ra */
+	
+	return pxTopOfStack;
+}
+/*-----------------------------------------------------------*/
+
+void vPortSysTickHandler( void )
+{
+	prvSetNextTimerInterrupt();
+
+	/* Increment the RTOS tick. */
+	if( xTaskIncrementTick() != pdFALSE )
+	{
+		vTaskSwitchContext();
+	}
+}
+/*-----------------------------------------------------------*/
+

Source/portable/GCC/RISCV/portasm.S

@@ -0,0 +1,307 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution and was contributed
+    to the project by Technolution B.V. (www.technolution.nl,
+    freertos-riscv@technolution.eu) under the terms of the FreeRTOS
+    contributors license.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry''s de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+
+#if __riscv_xlen == 64
+# define STORE    sd
+# define LOAD     ld
+# define REGBYTES 8
+#else
+# define STORE    sw
+# define LOAD     lw
+# define REGBYTES 4
+#endif
+
+/* Enable interrupts when returning from the handler */
+#define MSTATUS_PRV1 0x1880
+
+.global portSAVE_CONTEXT
+.global portRESTORE_CONTEXT
+.global TIMER_CMP_INT
+.global xPortStartScheduler
+.global vPortYield
+.global vTaskIncrementTick
+.global vPortEndScheduler
+.global xExitStack
+
+
+/* Macro for saving task context */
+.macro portSAVE_CONTEXT
+	.global	pxCurrentTCB
+	/* make room in stack */
+	addi	sp, sp, -REGBYTES * 32
+
+	/* Save Context */
+	STORE	x1, 0x0(sp)
+	STORE	x2, 1 * REGBYTES(sp)
+	STORE	x3, 2 * REGBYTES(sp)
+	STORE	x4, 3 * REGBYTES(sp)
+	STORE	x5, 4 * REGBYTES(sp)
+	STORE	x6, 5 * REGBYTES(sp)
+	STORE	x7, 6 * REGBYTES(sp)
+	STORE	x8, 7 * REGBYTES(sp)
+	STORE	x9, 8 * REGBYTES(sp)
+	STORE	x10, 9 * REGBYTES(sp)
+	STORE	x11, 10 * REGBYTES(sp)
+	STORE	x12, 11 * REGBYTES(sp)
+	STORE	x13, 12 * REGBYTES(sp)
+	STORE	x14, 13 * REGBYTES(sp)
+	STORE	x15, 14 * REGBYTES(sp)
+	STORE	x16, 15 * REGBYTES(sp)
+	STORE	x17, 16 * REGBYTES(sp)
+	STORE	x18, 17 * REGBYTES(sp)
+	STORE	x19, 18 * REGBYTES(sp)
+	STORE	x20, 19 * REGBYTES(sp)
+	STORE	x21, 20 * REGBYTES(sp)
+	STORE	x22, 21 * REGBYTES(sp)
+	STORE	x23, 22 * REGBYTES(sp)
+	STORE	x24, 23 * REGBYTES(sp)
+	STORE	x25, 24 * REGBYTES(sp)
+	STORE	x26, 25 * REGBYTES(sp)
+	STORE	x27, 26 * REGBYTES(sp)
+	STORE	x28, 27 * REGBYTES(sp)
+	STORE	x29, 28 * REGBYTES(sp)
+	STORE	x30, 29 * REGBYTES(sp)
+	STORE	x31, 30 * REGBYTES(sp)
+	
+	/* Store current stackpointer in task control block (TCB) */
+	LOAD	t0, pxCurrentTCB	//pointer
+	STORE	sp, 0x0(t0)
+	.endm
+
+/* Saves current error program counter (EPC) as task program counter */
+.macro portSAVE_EPC
+  	csrr	t0, mepc
+	STORE	t0, 31 * REGBYTES(sp)
+	.endm
+
+/* Saves current return adress (RA) as task program counter */
+.macro portSAVE_RA
+	STORE	ra, 31 * REGBYTES(sp)
+	.endm
+
+/* Macro for restoring task context */
+.macro portRESTORE_CONTEXT
+
+	.global	pxCurrentTCB
+	/* Load stack pointer from the current TCB */
+	LOAD	sp, pxCurrentTCB
+	LOAD	sp, 0x0(sp)
+
+	/* Load task program counter */
+	LOAD	t0, 31 * REGBYTES(sp)
+  	csrw	mepc, t0
+
+	/* Run in machine mode */
+  	li 		t0, MSTATUS_PRV1
+  	csrs	mstatus, t0
+
+	/* Restore registers,
+	   Skip global pointer because that does not change */
+	LOAD	x1, 0x0(sp)
+	LOAD	x4, 3 * REGBYTES(sp)
+	LOAD	x5, 4 * REGBYTES(sp)
+	LOAD	x6, 5 * REGBYTES(sp)
+	LOAD	x7, 6 * REGBYTES(sp)
+	LOAD	x8, 7 * REGBYTES(sp)
+	LOAD	x9, 8 * REGBYTES(sp)
+	LOAD	x10, 9 * REGBYTES(sp)
+	LOAD	x11, 10 * REGBYTES(sp)
+	LOAD	x12, 11 * REGBYTES(sp)
+	LOAD	x13, 12 * REGBYTES(sp)
+	LOAD	x14, 13 * REGBYTES(sp)
+	LOAD	x15, 14 * REGBYTES(sp)
+	LOAD	x16, 15 * REGBYTES(sp)
+	LOAD	x17, 16 * REGBYTES(sp)
+	LOAD	x18, 17 * REGBYTES(sp)
+	LOAD	x19, 18 * REGBYTES(sp)
+	LOAD	x20, 19 * REGBYTES(sp)
+	LOAD	x21, 20 * REGBYTES(sp)
+	LOAD	x22, 21 * REGBYTES(sp)
+	LOAD	x23, 22 * REGBYTES(sp)
+	LOAD	x24, 23 * REGBYTES(sp)
+	LOAD	x25, 24 * REGBYTES(sp)
+	LOAD	x26, 25 * REGBYTES(sp)
+	LOAD	x27, 26 * REGBYTES(sp)
+	LOAD	x28, 27 * REGBYTES(sp)
+	LOAD	x29, 28 * REGBYTES(sp)
+	LOAD	x30, 29 * REGBYTES(sp)
+	LOAD	x31, 30 * REGBYTES(sp)
+
+	addi	sp, sp, REGBYTES * 32
+	mret
+	.endm
+
+/* Macro for restoring task context */
+TIMER_CMP_INT:
+	portSAVE_CONTEXT
+	portSAVE_EPC
+	jal	vPortSysTickHandler
+	portRESTORE_CONTEXT
+    .endm
+
+
+xPortStartScheduler:
+#ifdef __gracefulExit
+	/* Stores context when starting the scheduler in xStartContext.
+	   This is used for when you want to gracefully exit the scheduler.
+	   For example if you want to test multiple instances after each other in one test suite.
+     */
+	la		t0, xStartContext
+	STORE	x1, 0x0(t0)
+	STORE	x2, 1 * REGBYTES(t0)
+	STORE	x3, 2 * REGBYTES(t0)
+	STORE	x4, 3 * REGBYTES(t0)
+	STORE	x5, 4 * REGBYTES(t0)
+	STORE	x6, 5 * REGBYTES(t0)
+	STORE	x7, 6 * REGBYTES(t0)
+	STORE	x8, 7 * REGBYTES(t0)
+	STORE	x9, 8 * REGBYTES(t0)
+	STORE	x10, 9 * REGBYTES(t0)
+	STORE	x11, 10 * REGBYTES(t0)
+	STORE	x12, 11 * REGBYTES(t0)
+	STORE	x13, 12 * REGBYTES(t0)
+	STORE	x14, 13 * REGBYTES(t0)
+	STORE	x15, 14 * REGBYTES(t0)
+	STORE	x16, 15 * REGBYTES(t0)
+	STORE	x17, 16 * REGBYTES(t0)
+	STORE	x18, 17 * REGBYTES(t0)
+	STORE	x19, 18 * REGBYTES(t0)
+	STORE	x20, 19 * REGBYTES(t0)
+	STORE	x21, 20 * REGBYTES(t0)
+	STORE	x22, 21 * REGBYTES(t0)
+	STORE	x23, 22 * REGBYTES(t0)
+	STORE	x24, 23 * REGBYTES(t0)
+	STORE	x25, 24 * REGBYTES(t0)
+	STORE	x26, 25 * REGBYTES(t0)
+	STORE	x27, 26 * REGBYTES(t0)
+	STORE	x28, 27 * REGBYTES(t0)
+	STORE	x29, 28 * REGBYTES(t0)
+	STORE	x30, 29 * REGBYTES(t0)
+	STORE	x31, 30 * REGBYTES(t0)
+#endif
+	jal		vPortSetupTimer
+	portRESTORE_CONTEXT
+
+vPortEndScheduler:
+#ifdef __gracefulExit
+	/* Load current context from xStartContext */
+	la		t0, xStartContext
+	LOAD	x1, 0x0(t0)
+	LOAD	x2, 1 * REGBYTES(t0)
+	LOAD	x3, 2 * REGBYTES(t0)
+	LOAD	x4, 3 * REGBYTES(t0)
+	LOAD	x5, 4 * REGBYTES(t0)
+	LOAD	x6, 5 * REGBYTES(t0)
+	LOAD	x7, 6 * REGBYTES(t0)
+	LOAD	x8, 7 * REGBYTES(t0)
+	LOAD	x9, 8 * REGBYTES(t0)
+	LOAD	x10, 9 * REGBYTES(t0)
+	LOAD	x11, 10 * REGBYTES(t0)
+	LOAD	x12, 11 * REGBYTES(t0)
+	LOAD	x13, 12 * REGBYTES(t0)
+	LOAD	x14, 13 * REGBYTES(t0)
+	LOAD	x15, 14 * REGBYTES(t0)
+	LOAD	x16, 15 * REGBYTES(t0)
+	LOAD	x17, 16 * REGBYTES(t0)
+	LOAD	x18, 17 * REGBYTES(t0)
+	LOAD	x19, 18 * REGBYTES(t0)
+	LOAD	x20, 19 * REGBYTES(t0)
+	LOAD	x21, 20 * REGBYTES(t0)
+	LOAD	x22, 21 * REGBYTES(t0)
+	LOAD	x23, 22 * REGBYTES(t0)
+	LOAD	x24, 23 * REGBYTES(t0)
+	LOAD	x25, 24 * REGBYTES(t0)
+	LOAD	x26, 25 * REGBYTES(t0)
+	LOAD	x27, 26 * REGBYTES(t0)
+	LOAD	x28, 27 * REGBYTES(t0)
+	LOAD	x29, 28 * REGBYTES(t0)
+	LOAD	x30, 39 * REGBYTES(t0)
+	LOAD	x31, 30 * REGBYTES(t0)
+#endif
+	ret
+
+vPortYield:
+	/*
+	*  This routine can be called from outside of interrupt handler. This means
+	*  interrupts may be enabled at this point. This is probably okay for registers and
+	*  stack. However, "mepc" will be overwritten by the interrupt handler if a timer
+	*  interrupt happens during the yield. To avoid this, prevent interrupts before starting.
+	*  The write to mstatus in the restore context routine will enable interrupts after the
+	*  mret. A more fine-grain lock may be possible.
+	*/  
+	csrci mstatus, 8
+
+	portSAVE_CONTEXT
+	portSAVE_RA
+	jal	vTaskSwitchContext
+	portRESTORE_CONTEXT

Source/portable/GCC/RISCV/portmacro.h

@@ -0,0 +1,163 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution and was contributed
+    to the project by Technolution B.V. (www.technolution.nl,
+    freertos-riscv@technolution.eu) under the terms of the FreeRTOS
+    contributors license.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+
+#ifndef PORTMACRO_H
+#define PORTMACRO_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*-----------------------------------------------------------
+ * Port specific definitions.
+ *
+ * The settings in this file configure FreeRTOS correctly for the
+ * given hardware and compiler.
+ *
+ * These settings should not be altered.
+ *-----------------------------------------------------------
+ */
+
+/* Type definitions. */
+#define portCHAR		char
+#define portFLOAT		float
+#define portDOUBLE		double
+#define portLONG		long
+#define portSHORT		short
+#define portBASE_TYPE	long
+
+#if __riscv_xlen == 64
+	#define portSTACK_TYPE	uint64_t
+	#define portPOINTER_SIZE_TYPE	uint64_t
+#else
+	#define portSTACK_TYPE	uint32_t
+	#define portPOINTER_SIZE_TYPE	uint32_t
+#endif
+
+typedef portSTACK_TYPE StackType_t;
+typedef long BaseType_t;
+typedef unsigned long UBaseType_t;
+
+#if( configUSE_16_BIT_TICKS == 1 )
+	typedef uint16_t TickType_t;
+	#define portMAX_DELAY ( TickType_t ) 0xffff
+#else
+	typedef uint32_t TickType_t;
+	#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
+#endif
+/*-----------------------------------------------------------*/
+
+/* Architecture specifics. */
+#define portSTACK_GROWTH			( -1 )
+#define portTICK_PERIOD_MS			( ( TickType_t ) (1000 / configTICK_RATE_HZ) )
+#if __riscv_xlen == 64
+	#define portBYTE_ALIGNMENT	8
+#else
+	#define portBYTE_ALIGNMENT	4
+#endif
+#define portCRITICAL_NESTING_IN_TCB					1
+/*-----------------------------------------------------------*/
+
+
+/* Scheduler utilities. */
+extern void vPortYield( void );
+#define portYIELD()					vPortYield()
+/*-----------------------------------------------------------*/
+
+
+/* Critical section management. */
+extern int vPortSetInterruptMask( void );
+extern void vPortClearInterruptMask( int );
+extern void vTaskEnterCritical( void );
+extern void vTaskExitCritical( void );
+
+#define portDISABLE_INTERRUPTS()				__asm volatile 	( "csrc mstatus,8" )
+#define portENABLE_INTERRUPTS()					__asm volatile 	( "csrs mstatus,8" )
+#define portENTER_CRITICAL()					vTaskEnterCritical()
+#define portEXIT_CRITICAL()						vTaskExitCritical()
+#define portSET_INTERRUPT_MASK_FROM_ISR()       vPortSetInterruptMask()
+#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusValue )       vPortClearInterruptMask( uxSavedStatusValue )
+/*-----------------------------------------------------------*/
+
+/* Task function macros as described on the FreeRTOS.org WEB site. */
+#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
+#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
+
+#define portNOP() __asm volatile 	( " nop " )
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PORTMACRO_H */
+

Source/portable/MemMang/heap_1.c

@@ -0,0 +1,174 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+
+/*
+ * The simplest possible implementation of pvPortMalloc().  Note that this
+ * implementation does NOT allow allocated memory to be freed again.
+ *
+ * See heap_2.c, heap_3.c and heap_4.c for alternative implementations, and the
+ * memory management pages of http://www.FreeRTOS.org for more information.
+ */
+#include <stdlib.h>
+
+/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
+all the API functions to use the MPU wrappers.  That should only be done when
+task.h is included from an application file. */
+#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+#include "FreeRTOS.h"
+#include "task.h"
+
+#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+/* A few bytes might be lost to byte aligning the heap start address. */
+#define configADJUSTED_HEAP_SIZE	( configTOTAL_HEAP_SIZE - portBYTE_ALIGNMENT )
+
+/* Allocate the memory for the heap. */
+static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+static size_t xNextFreeByte = ( size_t ) 0;
+
+/*-----------------------------------------------------------*/
+
+void *pvPortMalloc( size_t xWantedSize )
+{
+void *pvReturn = NULL;
+static uint8_t *pucAlignedHeap = NULL;
+
+	/* Ensure that blocks are always aligned to the required number of bytes. */
+	#if portBYTE_ALIGNMENT != 1
+		if( xWantedSize & portBYTE_ALIGNMENT_MASK )
+		{
+			/* Byte alignment required. */
+			xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );
+		}
+	#endif
+
+	vTaskSuspendAll();
+	{
+		if( pucAlignedHeap == NULL )
+		{
+			/* Ensure the heap starts on a correctly aligned boundary. */
+			pucAlignedHeap = ( uint8_t * ) ( ( ( portPOINTER_SIZE_TYPE ) &ucHeap[ portBYTE_ALIGNMENT ] ) & ( ~( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) ) );
+		}
+
+		/* Check there is enough room left for the allocation. */
+		if( ( ( xNextFreeByte + xWantedSize ) < configADJUSTED_HEAP_SIZE ) &&
+			( ( xNextFreeByte + xWantedSize ) > xNextFreeByte )	)/* Check for overflow. */
+		{
+			/* Return the next free byte then increment the index past this
+			block. */
+			pvReturn = pucAlignedHeap + xNextFreeByte;
+			xNextFreeByte += xWantedSize;
+		}
+
+		traceMALLOC( pvReturn, xWantedSize );
+	}
+	( void ) xTaskResumeAll();
+
+	#if( configUSE_MALLOC_FAILED_HOOK == 1 )
+	{
+		if( pvReturn == NULL )
+		{
+			extern void vApplicationMallocFailedHook( void );
+			vApplicationMallocFailedHook();
+		}
+	}
+	#endif
+
+	return pvReturn;
+}
+/*-----------------------------------------------------------*/
+
+void vPortFree( void *pv )
+{
+	/* Memory cannot be freed using this scheme.  See heap_2.c, heap_3.c and
+	heap_4.c for alternative implementations, and the memory management pages of
+	http://www.FreeRTOS.org for more information. */
+	( void ) pv;
+
+	/* Force an assert as it is invalid to call this function. */
+	configASSERT( pv == NULL );
+}
+/*-----------------------------------------------------------*/
+
+void vPortInitialiseBlocks( void )
+{
+	/* Only required when static memory is not cleared. */
+	xNextFreeByte = ( size_t ) 0;
+}
+/*-----------------------------------------------------------*/
+
+size_t xPortGetFreeHeapSize( void )
+{
+	return ( configADJUSTED_HEAP_SIZE - xNextFreeByte );
+}
+
+
+

Source/portable/MemMang/heap_2.c

@@ -0,0 +1,304 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+/*
+ * A sample implementation of pvPortMalloc() and vPortFree() that permits
+ * allocated blocks to be freed, but does not combine adjacent free blocks
+ * into a single larger block (and so will fragment memory).  See heap_4.c for
+ * an equivalent that does combine adjacent blocks into single larger blocks.
+ *
+ * See heap_1.c, heap_3.c and heap_4.c for alternative implementations, and the
+ * memory management pages of http://www.FreeRTOS.org for more information.
+ */
+#include <stdlib.h>
+
+/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
+all the API functions to use the MPU wrappers.  That should only be done when
+task.h is included from an application file. */
+#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+#include "FreeRTOS.h"
+#include "task.h"
+
+#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+/* A few bytes might be lost to byte aligning the heap start address. */
+#define configADJUSTED_HEAP_SIZE	( configTOTAL_HEAP_SIZE - portBYTE_ALIGNMENT )
+
+/*
+ * Initialises the heap structures before their first use.
+ */
+static void prvHeapInit( void );
+
+/* Allocate the memory for the heap. */
+static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+
+/* Define the linked list structure.  This is used to link free blocks in order
+of their size. */
+typedef struct A_BLOCK_LINK
+{
+	struct A_BLOCK_LINK *pxNextFreeBlock;	/*<< The next free block in the list. */
+	size_t xBlockSize;						/*<< The size of the free block. */
+} BlockLink_t;
+
+
+static const uint16_t heapSTRUCT_SIZE	= ( ( sizeof ( BlockLink_t ) + ( portBYTE_ALIGNMENT - 1 ) ) & ~portBYTE_ALIGNMENT_MASK );
+#define heapMINIMUM_BLOCK_SIZE	( ( size_t ) ( heapSTRUCT_SIZE * 2 ) )
+
+/* Create a couple of list links to mark the start and end of the list. */
+static BlockLink_t xStart, xEnd;
+
+/* Keeps track of the number of free bytes remaining, but says nothing about
+fragmentation. */
+static size_t xFreeBytesRemaining = configADJUSTED_HEAP_SIZE;
+
+/* STATIC FUNCTIONS ARE DEFINED AS MACROS TO MINIMIZE THE FUNCTION CALL DEPTH. */
+
+/*
+ * Insert a block into the list of free blocks - which is ordered by size of
+ * the block.  Small blocks at the start of the list and large blocks at the end
+ * of the list.
+ */
+#define prvInsertBlockIntoFreeList( pxBlockToInsert )								\
+{																					\
+BlockLink_t *pxIterator;																\
+size_t xBlockSize;																	\
+																					\
+	xBlockSize = pxBlockToInsert->xBlockSize;										\
+																					\
+	/* Iterate through the list until a block is found that has a larger size */	\
+	/* than the block we are inserting. */											\
+	for( pxIterator = &xStart; pxIterator->pxNextFreeBlock->xBlockSize < xBlockSize; pxIterator = pxIterator->pxNextFreeBlock )	\
+	{																				\
+		/* There is nothing to do here - just iterate to the correct position. */	\
+	}																				\
+																					\
+	/* Update the list to include the block being inserted in the correct */		\
+	/* position. */																	\
+	pxBlockToInsert->pxNextFreeBlock = pxIterator->pxNextFreeBlock;					\
+	pxIterator->pxNextFreeBlock = pxBlockToInsert;									\
+}
+/*-----------------------------------------------------------*/
+
+
+void *pvPortMalloc( size_t xWantedSize )
+{
+BlockLink_t *pxBlock, *pxPreviousBlock, *pxNewBlockLink;
+static BaseType_t xHeapHasBeenInitialised = pdFALSE;
+void *pvReturn = NULL;
+
+	vTaskSuspendAll();
+	{
+		/* If this is the first call to malloc then the heap will require
+		initialisation to setup the list of free blocks. */
+		if( xHeapHasBeenInitialised == pdFALSE )
+		{
+			prvHeapInit();
+			xHeapHasBeenInitialised = pdTRUE;
+		}
+
+		/* The wanted size is increased so it can contain a BlockLink_t
+		structure in addition to the requested amount of bytes. */
+		if( xWantedSize > 0 )
+		{
+			xWantedSize += heapSTRUCT_SIZE;
+
+			/* Ensure that blocks are always aligned to the required number of bytes. */
+			if( ( xWantedSize & portBYTE_ALIGNMENT_MASK ) != 0 )
+			{
+				/* Byte alignment required. */
+				xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );
+			}
+		}
+
+		if( ( xWantedSize > 0 ) && ( xWantedSize < configADJUSTED_HEAP_SIZE ) )
+		{
+			/* Blocks are stored in byte order - traverse the list from the start
+			(smallest) block until one of adequate size is found. */
+			pxPreviousBlock = &xStart;
+			pxBlock = xStart.pxNextFreeBlock;
+			while( ( pxBlock->xBlockSize < xWantedSize ) && ( pxBlock->pxNextFreeBlock != NULL ) )
+			{
+				pxPreviousBlock = pxBlock;
+				pxBlock = pxBlock->pxNextFreeBlock;
+			}
+
+			/* If we found the end marker then a block of adequate size was not found. */
+			if( pxBlock != &xEnd )
+			{
+				/* Return the memory space - jumping over the BlockLink_t structure
+				at its start. */
+				pvReturn = ( void * ) ( ( ( uint8_t * ) pxPreviousBlock->pxNextFreeBlock ) + heapSTRUCT_SIZE );
+
+				/* This block is being returned for use so must be taken out of the
+				list of free blocks. */
+				pxPreviousBlock->pxNextFreeBlock = pxBlock->pxNextFreeBlock;
+
+				/* If the block is larger than required it can be split into two. */
+				if( ( pxBlock->xBlockSize - xWantedSize ) > heapMINIMUM_BLOCK_SIZE )
+				{
+					/* This block is to be split into two.  Create a new block
+					following the number of bytes requested. The void cast is
+					used to prevent byte alignment warnings from the compiler. */
+					pxNewBlockLink = ( void * ) ( ( ( uint8_t * ) pxBlock ) + xWantedSize );
+
+					/* Calculate the sizes of two blocks split from the single
+					block. */
+					pxNewBlockLink->xBlockSize = pxBlock->xBlockSize - xWantedSize;
+					pxBlock->xBlockSize = xWantedSize;
+
+					/* Insert the new block into the list of free blocks. */
+					prvInsertBlockIntoFreeList( ( pxNewBlockLink ) );
+				}
+
+				xFreeBytesRemaining -= pxBlock->xBlockSize;
+			}
+		}
+
+		traceMALLOC( pvReturn, xWantedSize );
+	}
+	( void ) xTaskResumeAll();
+
+	#if( configUSE_MALLOC_FAILED_HOOK == 1 )
+	{
+		if( pvReturn == NULL )
+		{
+			extern void vApplicationMallocFailedHook( void );
+			vApplicationMallocFailedHook();
+		}
+	}
+	#endif
+
+	return pvReturn;
+}
+/*-----------------------------------------------------------*/
+
+void vPortFree( void *pv )
+{
+uint8_t *puc = ( uint8_t * ) pv;
+BlockLink_t *pxLink;
+
+	if( pv != NULL )
+	{
+		/* The memory being freed will have an BlockLink_t structure immediately
+		before it. */
+		puc -= heapSTRUCT_SIZE;
+
+		/* This unexpected casting is to keep some compilers from issuing
+		byte alignment warnings. */
+		pxLink = ( void * ) puc;
+
+		vTaskSuspendAll();
+		{
+			/* Add this block to the list of free blocks. */
+			prvInsertBlockIntoFreeList( ( ( BlockLink_t * ) pxLink ) );
+			xFreeBytesRemaining += pxLink->xBlockSize;
+			traceFREE( pv, pxLink->xBlockSize );
+		}
+		( void ) xTaskResumeAll();
+	}
+}
+/*-----------------------------------------------------------*/
+
+size_t xPortGetFreeHeapSize( void )
+{
+	return xFreeBytesRemaining;
+}
+/*-----------------------------------------------------------*/
+
+void vPortInitialiseBlocks( void )
+{
+	/* This just exists to keep the linker quiet. */
+}
+/*-----------------------------------------------------------*/
+
+static void prvHeapInit( void )
+{
+BlockLink_t *pxFirstFreeBlock;
+uint8_t *pucAlignedHeap;
+
+	/* Ensure the heap starts on a correctly aligned boundary. */
+	pucAlignedHeap = ( uint8_t * ) ( ( ( portPOINTER_SIZE_TYPE ) &ucHeap[ portBYTE_ALIGNMENT ] ) & ( ~( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) ) );
+
+	/* xStart is used to hold a pointer to the first item in the list of free
+	blocks.  The void cast is used to prevent compiler warnings. */
+	xStart.pxNextFreeBlock = ( void * ) pucAlignedHeap;
+	xStart.xBlockSize = ( size_t ) 0;
+
+	/* xEnd is used to mark the end of the list of free blocks. */
+	xEnd.xBlockSize = configADJUSTED_HEAP_SIZE;
+	xEnd.pxNextFreeBlock = NULL;
+
+	/* To start with there is a single free block that is sized to take up the
+	entire heap space. */
+	pxFirstFreeBlock = ( void * ) pucAlignedHeap;
+	pxFirstFreeBlock->xBlockSize = configADJUSTED_HEAP_SIZE;
+	pxFirstFreeBlock->pxNextFreeBlock = &xEnd;
+}
+/*-----------------------------------------------------------*/

Source/portable/MemMang/heap_3.c

@@ -0,0 +1,135 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+
+/*
+ * Implementation of pvPortMalloc() and vPortFree() that relies on the
+ * compilers own malloc() and free() implementations.
+ *
+ * This file can only be used if the linker is configured to to generate
+ * a heap memory area.
+ *
+ * See heap_1.c, heap_2.c and heap_4.c for alternative implementations, and the
+ * memory management pages of http://www.FreeRTOS.org for more information.
+ */
+
+#include <stdlib.h>
+
+/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
+all the API functions to use the MPU wrappers.  That should only be done when
+task.h is included from an application file. */
+#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+#include "FreeRTOS.h"
+#include "task.h"
+
+#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+/*-----------------------------------------------------------*/
+
+void *pvPortMalloc( size_t xWantedSize )
+{
+void *pvReturn;
+
+	vTaskSuspendAll();
+	{
+		pvReturn = malloc( xWantedSize );
+		traceMALLOC( pvReturn, xWantedSize );
+	}
+	( void ) xTaskResumeAll();
+
+	#if( configUSE_MALLOC_FAILED_HOOK == 1 )
+	{
+		if( pvReturn == NULL )
+		{
+			extern void vApplicationMallocFailedHook( void );
+			vApplicationMallocFailedHook();
+		}
+	}
+	#endif
+
+	return pvReturn;
+}
+/*-----------------------------------------------------------*/
+
+void vPortFree( void *pv )
+{
+	if( pv )
+	{
+		vTaskSuspendAll();
+		{
+			free( pv );
+			traceFREE( pv, 0 );
+		}
+		( void ) xTaskResumeAll();
+	}
+}
+
+
+

Source/portable/MemMang/heap_4.c

@@ -0,0 +1,474 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+/*
+ * A sample implementation of pvPortMalloc() and vPortFree() that combines
+ * (coalescences) adjacent memory blocks as they are freed, and in so doing
+ * limits memory fragmentation.
+ *
+ * See heap_1.c, heap_2.c and heap_3.c for alternative implementations, and the
+ * memory management pages of http://www.FreeRTOS.org for more information.
+ */
+#include <stdlib.h>
+
+/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
+all the API functions to use the MPU wrappers.  That should only be done when
+task.h is included from an application file. */
+#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+#include "FreeRTOS.h"
+#include "task.h"
+
+#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+/* Block sizes must not get too small. */
+#define heapMINIMUM_BLOCK_SIZE	( ( size_t ) ( xHeapStructSize << 1 ) )
+
+/* Assumes 8bit bytes! */
+#define heapBITS_PER_BYTE		( ( size_t ) 8 )
+
+/* Allocate the memory for the heap. */
+#if( configAPPLICATION_ALLOCATED_HEAP == 1 )
+	/* The application writer has already defined the array used for the RTOS
+	heap - probably so it can be placed in a special segment or address. */
+	extern uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+#else
+	static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+#endif /* configAPPLICATION_ALLOCATED_HEAP */
+
+/* Define the linked list structure.  This is used to link free blocks in order
+of their memory address. */
+typedef struct A_BLOCK_LINK
+{
+	struct A_BLOCK_LINK *pxNextFreeBlock;	/*<< The next free block in the list. */
+	size_t xBlockSize;						/*<< The size of the free block. */
+} BlockLink_t;
+
+/*-----------------------------------------------------------*/
+
+/*
+ * Inserts a block of memory that is being freed into the correct position in
+ * the list of free memory blocks.  The block being freed will be merged with
+ * the block in front it and/or the block behind it if the memory blocks are
+ * adjacent to each other.
+ */
+static void prvInsertBlockIntoFreeList( BlockLink_t *pxBlockToInsert );
+
+/*
+ * Called automatically to setup the required heap structures the first time
+ * pvPortMalloc() is called.
+ */
+static void prvHeapInit( void );
+
+/*-----------------------------------------------------------*/
+
+/* The size of the structure placed at the beginning of each allocated memory
+block must by correctly byte aligned. */
+static const size_t xHeapStructSize	= ( sizeof( BlockLink_t ) + ( ( size_t ) ( portBYTE_ALIGNMENT - 1 ) ) ) & ~( ( size_t ) portBYTE_ALIGNMENT_MASK );
+
+/* Create a couple of list links to mark the start and end of the list. */
+static BlockLink_t xStart, *pxEnd = NULL;
+
+/* Keeps track of the number of free bytes remaining, but says nothing about
+fragmentation. */
+static size_t xFreeBytesRemaining = 0U;
+static size_t xMinimumEverFreeBytesRemaining = 0U;
+
+/* Gets set to the top bit of an size_t type.  When this bit in the xBlockSize
+member of an BlockLink_t structure is set then the block belongs to the
+application.  When the bit is free the block is still part of the free heap
+space. */
+static size_t xBlockAllocatedBit = 0;
+
+/*-----------------------------------------------------------*/
+
+void *pvPortMalloc( size_t xWantedSize )
+{
+BlockLink_t *pxBlock, *pxPreviousBlock, *pxNewBlockLink;
+void *pvReturn = NULL;
+
+	vTaskSuspendAll();
+	{
+		/* If this is the first call to malloc then the heap will require
+		initialisation to setup the list of free blocks. */
+		if( pxEnd == NULL )
+		{
+			prvHeapInit();
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+
+		/* Check the requested block size is not so large that the top bit is
+		set.  The top bit of the block size member of the BlockLink_t structure
+		is used to determine who owns the block - the application or the
+		kernel, so it must be free. */
+		if( ( xWantedSize & xBlockAllocatedBit ) == 0 )
+		{
+			/* The wanted size is increased so it can contain a BlockLink_t
+			structure in addition to the requested amount of bytes. */
+			if( xWantedSize > 0 )
+			{
+				xWantedSize += xHeapStructSize;
+
+				/* Ensure that blocks are always aligned to the required number
+				of bytes. */
+				if( ( xWantedSize & portBYTE_ALIGNMENT_MASK ) != 0x00 )
+				{
+					/* Byte alignment required. */
+					xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );
+					configASSERT( ( xWantedSize & portBYTE_ALIGNMENT_MASK ) == 0 );
+				}
+				else
+				{
+					mtCOVERAGE_TEST_MARKER();
+				}
+			}
+			else
+			{
+				mtCOVERAGE_TEST_MARKER();
+			}
+
+			if( ( xWantedSize > 0 ) && ( xWantedSize <= xFreeBytesRemaining ) )
+			{
+				/* Traverse the list from the start	(lowest address) block until
+				one	of adequate size is found. */
+				pxPreviousBlock = &xStart;
+				pxBlock = xStart.pxNextFreeBlock;
+				while( ( pxBlock->xBlockSize < xWantedSize ) && ( pxBlock->pxNextFreeBlock != NULL ) )
+				{
+					pxPreviousBlock = pxBlock;
+					pxBlock = pxBlock->pxNextFreeBlock;
+				}
+
+				/* If the end marker was reached then a block of adequate size
+				was	not found. */
+				if( pxBlock != pxEnd )
+				{
+					/* Return the memory space pointed to - jumping over the
+					BlockLink_t structure at its start. */
+					pvReturn = ( void * ) ( ( ( uint8_t * ) pxPreviousBlock->pxNextFreeBlock ) + xHeapStructSize );
+
+					/* This block is being returned for use so must be taken out
+					of the list of free blocks. */
+					pxPreviousBlock->pxNextFreeBlock = pxBlock->pxNextFreeBlock;
+
+					/* If the block is larger than required it can be split into
+					two. */
+					if( ( pxBlock->xBlockSize - xWantedSize ) > heapMINIMUM_BLOCK_SIZE )
+					{
+						/* This block is to be split into two.  Create a new
+						block following the number of bytes requested. The void
+						cast is used to prevent byte alignment warnings from the
+						compiler. */
+						pxNewBlockLink = ( void * ) ( ( ( uint8_t * ) pxBlock ) + xWantedSize );
+						configASSERT( ( ( ( size_t ) pxNewBlockLink ) & portBYTE_ALIGNMENT_MASK ) == 0 );
+
+						/* Calculate the sizes of two blocks split from the
+						single block. */
+						pxNewBlockLink->xBlockSize = pxBlock->xBlockSize - xWantedSize;
+						pxBlock->xBlockSize = xWantedSize;
+
+						/* Insert the new block into the list of free blocks. */
+						prvInsertBlockIntoFreeList( pxNewBlockLink );
+					}
+					else
+					{
+						mtCOVERAGE_TEST_MARKER();
+					}
+
+					xFreeBytesRemaining -= pxBlock->xBlockSize;
+
+					if( xFreeBytesRemaining < xMinimumEverFreeBytesRemaining )
+					{
+						xMinimumEverFreeBytesRemaining = xFreeBytesRemaining;
+					}
+					else
+					{
+						mtCOVERAGE_TEST_MARKER();
+					}
+
+					/* The block is being returned - it is allocated and owned
+					by the application and has no "next" block. */
+					pxBlock->xBlockSize |= xBlockAllocatedBit;
+					pxBlock->pxNextFreeBlock = NULL;
+				}
+				else
+				{
+					mtCOVERAGE_TEST_MARKER();
+				}
+			}
+			else
+			{
+				mtCOVERAGE_TEST_MARKER();
+			}
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+
+		traceMALLOC( pvReturn, xWantedSize );
+	}
+	( void ) xTaskResumeAll();
+
+	#if( configUSE_MALLOC_FAILED_HOOK == 1 )
+	{
+		if( pvReturn == NULL )
+		{
+			extern void vApplicationMallocFailedHook( void );
+			vApplicationMallocFailedHook();
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+	}
+	#endif
+
+	configASSERT( ( ( ( uint32_t ) pvReturn ) & portBYTE_ALIGNMENT_MASK ) == 0 );
+	return pvReturn;
+}
+/*-----------------------------------------------------------*/
+
+void vPortFree( void *pv )
+{
+uint8_t *puc = ( uint8_t * ) pv;
+BlockLink_t *pxLink;
+
+	if( pv != NULL )
+	{
+		/* The memory being freed will have an BlockLink_t structure immediately
+		before it. */
+		puc -= xHeapStructSize;
+
+		/* This casting is to keep the compiler from issuing warnings. */
+		pxLink = ( void * ) puc;
+
+		/* Check the block is actually allocated. */
+		configASSERT( ( pxLink->xBlockSize & xBlockAllocatedBit ) != 0 );
+		configASSERT( pxLink->pxNextFreeBlock == NULL );
+
+		if( ( pxLink->xBlockSize & xBlockAllocatedBit ) != 0 )
+		{
+			if( pxLink->pxNextFreeBlock == NULL )
+			{
+				/* The block is being returned to the heap - it is no longer
+				allocated. */
+				pxLink->xBlockSize &= ~xBlockAllocatedBit;
+
+				vTaskSuspendAll();
+				{
+					/* Add this block to the list of free blocks. */
+					xFreeBytesRemaining += pxLink->xBlockSize;
+					traceFREE( pv, pxLink->xBlockSize );
+					prvInsertBlockIntoFreeList( ( ( BlockLink_t * ) pxLink ) );
+				}
+				( void ) xTaskResumeAll();
+			}
+			else
+			{
+				mtCOVERAGE_TEST_MARKER();
+			}
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+	}
+}
+/*-----------------------------------------------------------*/
+
+size_t xPortGetFreeHeapSize( void )
+{
+	return xFreeBytesRemaining;
+}
+/*-----------------------------------------------------------*/
+
+size_t xPortGetMinimumEverFreeHeapSize( void )
+{
+	return xMinimumEverFreeBytesRemaining;
+}
+/*-----------------------------------------------------------*/
+
+void vPortInitialiseBlocks( void )
+{
+	/* This just exists to keep the linker quiet. */
+}
+/*-----------------------------------------------------------*/
+
+static void prvHeapInit( void )
+{
+BlockLink_t *pxFirstFreeBlock;
+uint8_t *pucAlignedHeap;
+size_t uxAddress;
+size_t xTotalHeapSize = configTOTAL_HEAP_SIZE;
+
+	/* Ensure the heap starts on a correctly aligned boundary. */
+	uxAddress = ( size_t ) ucHeap;
+
+	if( ( uxAddress & portBYTE_ALIGNMENT_MASK ) != 0 )
+	{
+		uxAddress += ( portBYTE_ALIGNMENT - 1 );
+		uxAddress &= ~( ( size_t ) portBYTE_ALIGNMENT_MASK );
+		xTotalHeapSize -= uxAddress - ( size_t ) ucHeap;
+	}
+
+	pucAlignedHeap = ( uint8_t * ) uxAddress;
+
+	/* xStart is used to hold a pointer to the first item in the list of free
+	blocks.  The void cast is used to prevent compiler warnings. */
+	xStart.pxNextFreeBlock = ( void * ) pucAlignedHeap;
+	xStart.xBlockSize = ( size_t ) 0;
+
+	/* pxEnd is used to mark the end of the list of free blocks and is inserted
+	at the end of the heap space. */
+	uxAddress = ( ( size_t ) pucAlignedHeap ) + xTotalHeapSize;
+	uxAddress -= xHeapStructSize;
+	uxAddress &= ~( ( size_t ) portBYTE_ALIGNMENT_MASK );
+	pxEnd = ( void * ) uxAddress;
+	pxEnd->xBlockSize = 0;
+	pxEnd->pxNextFreeBlock = NULL;
+
+	/* To start with there is a single free block that is sized to take up the
+	entire heap space, minus the space taken by pxEnd. */
+	pxFirstFreeBlock = ( void * ) pucAlignedHeap;
+	pxFirstFreeBlock->xBlockSize = uxAddress - ( size_t ) pxFirstFreeBlock;
+	pxFirstFreeBlock->pxNextFreeBlock = pxEnd;
+
+	/* Only one block exists - and it covers the entire usable heap space. */
+	xMinimumEverFreeBytesRemaining = pxFirstFreeBlock->xBlockSize;
+	xFreeBytesRemaining = pxFirstFreeBlock->xBlockSize;
+
+	/* Work out the position of the top bit in a size_t variable. */
+	xBlockAllocatedBit = ( ( size_t ) 1 ) << ( ( sizeof( size_t ) * heapBITS_PER_BYTE ) - 1 );
+}
+/*-----------------------------------------------------------*/
+
+static void prvInsertBlockIntoFreeList( BlockLink_t *pxBlockToInsert )
+{
+BlockLink_t *pxIterator;
+uint8_t *puc;
+
+	/* Iterate through the list until a block is found that has a higher address
+	than the block being inserted. */
+	for( pxIterator = &xStart; pxIterator->pxNextFreeBlock < pxBlockToInsert; pxIterator = pxIterator->pxNextFreeBlock )
+	{
+		/* Nothing to do here, just iterate to the right position. */
+	}
+
+	/* Do the block being inserted, and the block it is being inserted after
+	make a contiguous block of memory? */
+	puc = ( uint8_t * ) pxIterator;
+	if( ( puc + pxIterator->xBlockSize ) == ( uint8_t * ) pxBlockToInsert )
+	{
+		pxIterator->xBlockSize += pxBlockToInsert->xBlockSize;
+		pxBlockToInsert = pxIterator;
+	}
+	else
+	{
+		mtCOVERAGE_TEST_MARKER();
+	}
+
+	/* Do the block being inserted, and the block it is being inserted before
+	make a contiguous block of memory? */
+	puc = ( uint8_t * ) pxBlockToInsert;
+	if( ( puc + pxBlockToInsert->xBlockSize ) == ( uint8_t * ) pxIterator->pxNextFreeBlock )
+	{
+		if( pxIterator->pxNextFreeBlock != pxEnd )
+		{
+			/* Form one big block from the two blocks. */
+			pxBlockToInsert->xBlockSize += pxIterator->pxNextFreeBlock->xBlockSize;
+			pxBlockToInsert->pxNextFreeBlock = pxIterator->pxNextFreeBlock->pxNextFreeBlock;
+		}
+		else
+		{
+			pxBlockToInsert->pxNextFreeBlock = pxEnd;
+		}
+	}
+	else
+	{
+		pxBlockToInsert->pxNextFreeBlock = pxIterator->pxNextFreeBlock;
+	}
+
+	/* If the block being inserted plugged a gab, so was merged with the block
+	before and the block after, then it's pxNextFreeBlock pointer will have
+	already been set, and should not be set here as that would make it point
+	to itself. */
+	if( pxIterator != pxBlockToInsert )
+	{
+		pxIterator->pxNextFreeBlock = pxBlockToInsert;
+	}
+	else
+	{
+		mtCOVERAGE_TEST_MARKER();
+	}
+}
+

Source/portable/MemMang/heap_5.c

@@ -0,0 +1,523 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+/*
+ * A sample implementation of pvPortMalloc() that allows the heap to be defined
+ * across multiple non-contigous blocks and combines (coalescences) adjacent
+ * memory blocks as they are freed.
+ *
+ * See heap_1.c, heap_2.c, heap_3.c and heap_4.c for alternative
+ * implementations, and the memory management pages of http://www.FreeRTOS.org
+ * for more information.
+ *
+ * Usage notes:
+ *
+ * vPortDefineHeapRegions() ***must*** be called before pvPortMalloc().
+ * pvPortMalloc() will be called if any task objects (tasks, queues, event
+ * groups, etc.) are created, therefore vPortDefineHeapRegions() ***must*** be
+ * called before any other objects are defined.
+ *
+ * vPortDefineHeapRegions() takes a single parameter.  The parameter is an array
+ * of HeapRegion_t structures.  HeapRegion_t is defined in portable.h as
+ *
+ * typedef struct HeapRegion
+ * {
+ *	uint8_t *pucStartAddress; << Start address of a block of memory that will be part of the heap.
+ *	size_t xSizeInBytes;	  << Size of the block of memory.
+ * } HeapRegion_t;
+ *
+ * The array is terminated using a NULL zero sized region definition, and the
+ * memory regions defined in the array ***must*** appear in address order from
+ * low address to high address.  So the following is a valid example of how
+ * to use the function.
+ *
+ * HeapRegion_t xHeapRegions[] =
+ * {
+ * 	{ ( uint8_t * ) 0x80000000UL, 0x10000 }, << Defines a block of 0x10000 bytes starting at address 0x80000000
+ * 	{ ( uint8_t * ) 0x90000000UL, 0xa0000 }, << Defines a block of 0xa0000 bytes starting at address of 0x90000000
+ * 	{ NULL, 0 }                << Terminates the array.
+ * };
+ *
+ * vPortDefineHeapRegions( xHeapRegions ); << Pass the array into vPortDefineHeapRegions().
+ *
+ * Note 0x80000000 is the lower address so appears in the array first.
+ *
+ */
+#include <stdlib.h>
+
+/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
+all the API functions to use the MPU wrappers.  That should only be done when
+task.h is included from an application file. */
+#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+#include "FreeRTOS.h"
+#include "task.h"
+
+#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+/* Block sizes must not get too small. */
+#define heapMINIMUM_BLOCK_SIZE	( ( size_t ) ( xHeapStructSize << 1 ) )
+
+/* Assumes 8bit bytes! */
+#define heapBITS_PER_BYTE		( ( size_t ) 8 )
+
+/* Define the linked list structure.  This is used to link free blocks in order
+of their memory address. */
+typedef struct A_BLOCK_LINK
+{
+	struct A_BLOCK_LINK *pxNextFreeBlock;	/*<< The next free block in the list. */
+	size_t xBlockSize;						/*<< The size of the free block. */
+} BlockLink_t;
+
+/*-----------------------------------------------------------*/
+
+/*
+ * Inserts a block of memory that is being freed into the correct position in
+ * the list of free memory blocks.  The block being freed will be merged with
+ * the block in front it and/or the block behind it if the memory blocks are
+ * adjacent to each other.
+ */
+static void prvInsertBlockIntoFreeList( BlockLink_t *pxBlockToInsert );
+
+/*-----------------------------------------------------------*/
+
+/* The size of the structure placed at the beginning of each allocated memory
+block must by correctly byte aligned. */
+static const size_t xHeapStructSize	= ( sizeof( BlockLink_t ) + ( ( size_t ) ( portBYTE_ALIGNMENT - 1 ) ) ) & ~( ( size_t ) portBYTE_ALIGNMENT_MASK );
+
+/* Create a couple of list links to mark the start and end of the list. */
+static BlockLink_t xStart, *pxEnd = NULL;
+
+/* Keeps track of the number of free bytes remaining, but says nothing about
+fragmentation. */
+static size_t xFreeBytesRemaining = 0U;
+static size_t xMinimumEverFreeBytesRemaining = 0U;
+
+/* Gets set to the top bit of an size_t type.  When this bit in the xBlockSize
+member of an BlockLink_t structure is set then the block belongs to the
+application.  When the bit is free the block is still part of the free heap
+space. */
+static size_t xBlockAllocatedBit = 0;
+
+/*-----------------------------------------------------------*/
+
+void *pvPortMalloc( size_t xWantedSize )
+{
+BlockLink_t *pxBlock, *pxPreviousBlock, *pxNewBlockLink;
+void *pvReturn = NULL;
+
+	/* The heap must be initialised before the first call to
+	prvPortMalloc(). */
+	configASSERT( pxEnd );
+
+	vTaskSuspendAll();
+	{
+		/* Check the requested block size is not so large that the top bit is
+		set.  The top bit of the block size member of the BlockLink_t structure
+		is used to determine who owns the block - the application or the
+		kernel, so it must be free. */
+		if( ( xWantedSize & xBlockAllocatedBit ) == 0 )
+		{
+			/* The wanted size is increased so it can contain a BlockLink_t
+			structure in addition to the requested amount of bytes. */
+			if( xWantedSize > 0 )
+			{
+				xWantedSize += xHeapStructSize;
+
+				/* Ensure that blocks are always aligned to the required number
+				of bytes. */
+				if( ( xWantedSize & portBYTE_ALIGNMENT_MASK ) != 0x00 )
+				{
+					/* Byte alignment required. */
+					xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );
+				}
+				else
+				{
+					mtCOVERAGE_TEST_MARKER();
+				}
+			}
+			else
+			{
+				mtCOVERAGE_TEST_MARKER();
+			}
+
+			if( ( xWantedSize > 0 ) && ( xWantedSize <= xFreeBytesRemaining ) )
+			{
+				/* Traverse the list from the start	(lowest address) block until
+				one	of adequate size is found. */
+				pxPreviousBlock = &xStart;
+				pxBlock = xStart.pxNextFreeBlock;
+				while( ( pxBlock->xBlockSize < xWantedSize ) && ( pxBlock->pxNextFreeBlock != NULL ) )
+				{
+					pxPreviousBlock = pxBlock;
+					pxBlock = pxBlock->pxNextFreeBlock;
+				}
+
+				/* If the end marker was reached then a block of adequate size
+				was	not found. */
+				if( pxBlock != pxEnd )
+				{
+					/* Return the memory space pointed to - jumping over the
+					BlockLink_t structure at its start. */
+					pvReturn = ( void * ) ( ( ( uint8_t * ) pxPreviousBlock->pxNextFreeBlock ) + xHeapStructSize );
+
+					/* This block is being returned for use so must be taken out
+					of the list of free blocks. */
+					pxPreviousBlock->pxNextFreeBlock = pxBlock->pxNextFreeBlock;
+
+					/* If the block is larger than required it can be split into
+					two. */
+					if( ( pxBlock->xBlockSize - xWantedSize ) > heapMINIMUM_BLOCK_SIZE )
+					{
+						/* This block is to be split into two.  Create a new
+						block following the number of bytes requested. The void
+						cast is used to prevent byte alignment warnings from the
+						compiler. */
+						pxNewBlockLink = ( void * ) ( ( ( uint8_t * ) pxBlock ) + xWantedSize );
+
+						/* Calculate the sizes of two blocks split from the
+						single block. */
+						pxNewBlockLink->xBlockSize = pxBlock->xBlockSize - xWantedSize;
+						pxBlock->xBlockSize = xWantedSize;
+
+						/* Insert the new block into the list of free blocks. */
+						prvInsertBlockIntoFreeList( ( pxNewBlockLink ) );
+					}
+					else
+					{
+						mtCOVERAGE_TEST_MARKER();
+					}
+
+					xFreeBytesRemaining -= pxBlock->xBlockSize;
+
+					if( xFreeBytesRemaining < xMinimumEverFreeBytesRemaining )
+					{
+						xMinimumEverFreeBytesRemaining = xFreeBytesRemaining;
+					}
+					else
+					{
+						mtCOVERAGE_TEST_MARKER();
+					}
+
+					/* The block is being returned - it is allocated and owned
+					by the application and has no "next" block. */
+					pxBlock->xBlockSize |= xBlockAllocatedBit;
+					pxBlock->pxNextFreeBlock = NULL;
+				}
+				else
+				{
+					mtCOVERAGE_TEST_MARKER();
+				}
+			}
+			else
+			{
+				mtCOVERAGE_TEST_MARKER();
+			}
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+
+		traceMALLOC( pvReturn, xWantedSize );
+	}
+	( void ) xTaskResumeAll();
+
+	#if( configUSE_MALLOC_FAILED_HOOK == 1 )
+	{
+		if( pvReturn == NULL )
+		{
+			extern void vApplicationMallocFailedHook( void );
+			vApplicationMallocFailedHook();
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+	}
+	#endif
+
+	return pvReturn;
+}
+/*-----------------------------------------------------------*/
+
+void vPortFree( void *pv )
+{
+uint8_t *puc = ( uint8_t * ) pv;
+BlockLink_t *pxLink;
+
+	if( pv != NULL )
+	{
+		/* The memory being freed will have an BlockLink_t structure immediately
+		before it. */
+		puc -= xHeapStructSize;
+
+		/* This casting is to keep the compiler from issuing warnings. */
+		pxLink = ( void * ) puc;
+
+		/* Check the block is actually allocated. */
+		configASSERT( ( pxLink->xBlockSize & xBlockAllocatedBit ) != 0 );
+		configASSERT( pxLink->pxNextFreeBlock == NULL );
+
+		if( ( pxLink->xBlockSize & xBlockAllocatedBit ) != 0 )
+		{
+			if( pxLink->pxNextFreeBlock == NULL )
+			{
+				/* The block is being returned to the heap - it is no longer
+				allocated. */
+				pxLink->xBlockSize &= ~xBlockAllocatedBit;
+
+				vTaskSuspendAll();
+				{
+					/* Add this block to the list of free blocks. */
+					xFreeBytesRemaining += pxLink->xBlockSize;
+					traceFREE( pv, pxLink->xBlockSize );
+					prvInsertBlockIntoFreeList( ( ( BlockLink_t * ) pxLink ) );
+				}
+				( void ) xTaskResumeAll();
+			}
+			else
+			{
+				mtCOVERAGE_TEST_MARKER();
+			}
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+	}
+}
+/*-----------------------------------------------------------*/
+
+size_t xPortGetFreeHeapSize( void )
+{
+	return xFreeBytesRemaining;
+}
+/*-----------------------------------------------------------*/
+
+size_t xPortGetMinimumEverFreeHeapSize( void )
+{
+	return xMinimumEverFreeBytesRemaining;
+}
+/*-----------------------------------------------------------*/
+
+static void prvInsertBlockIntoFreeList( BlockLink_t *pxBlockToInsert )
+{
+BlockLink_t *pxIterator;
+uint8_t *puc;
+
+	/* Iterate through the list until a block is found that has a higher address
+	than the block being inserted. */
+	for( pxIterator = &xStart; pxIterator->pxNextFreeBlock < pxBlockToInsert; pxIterator = pxIterator->pxNextFreeBlock )
+	{
+		/* Nothing to do here, just iterate to the right position. */
+	}
+
+	/* Do the block being inserted, and the block it is being inserted after
+	make a contiguous block of memory? */
+	puc = ( uint8_t * ) pxIterator;
+	if( ( puc + pxIterator->xBlockSize ) == ( uint8_t * ) pxBlockToInsert )
+	{
+		pxIterator->xBlockSize += pxBlockToInsert->xBlockSize;
+		pxBlockToInsert = pxIterator;
+	}
+	else
+	{
+		mtCOVERAGE_TEST_MARKER();
+	}
+
+	/* Do the block being inserted, and the block it is being inserted before
+	make a contiguous block of memory? */
+	puc = ( uint8_t * ) pxBlockToInsert;
+	if( ( puc + pxBlockToInsert->xBlockSize ) == ( uint8_t * ) pxIterator->pxNextFreeBlock )
+	{
+		if( pxIterator->pxNextFreeBlock != pxEnd )
+		{
+			/* Form one big block from the two blocks. */
+			pxBlockToInsert->xBlockSize += pxIterator->pxNextFreeBlock->xBlockSize;
+			pxBlockToInsert->pxNextFreeBlock = pxIterator->pxNextFreeBlock->pxNextFreeBlock;
+		}
+		else
+		{
+			pxBlockToInsert->pxNextFreeBlock = pxEnd;
+		}
+	}
+	else
+	{
+		pxBlockToInsert->pxNextFreeBlock = pxIterator->pxNextFreeBlock;
+	}
+
+	/* If the block being inserted plugged a gab, so was merged with the block
+	before and the block after, then it's pxNextFreeBlock pointer will have
+	already been set, and should not be set here as that would make it point
+	to itself. */
+	if( pxIterator != pxBlockToInsert )
+	{
+		pxIterator->pxNextFreeBlock = pxBlockToInsert;
+	}
+	else
+	{
+		mtCOVERAGE_TEST_MARKER();
+	}
+}
+/*-----------------------------------------------------------*/
+
+void vPortDefineHeapRegions( const HeapRegion_t * const pxHeapRegions )
+{
+BlockLink_t *pxFirstFreeBlockInRegion = NULL, *pxPreviousFreeBlock;
+size_t xAlignedHeap;
+size_t xTotalRegionSize, xTotalHeapSize = 0;
+BaseType_t xDefinedRegions = 0;
+size_t xAddress;
+const HeapRegion_t *pxHeapRegion;
+
+	/* Can only call once! */
+	configASSERT( pxEnd == NULL );
+
+	pxHeapRegion = &( pxHeapRegions[ xDefinedRegions ] );
+
+	while( pxHeapRegion->xSizeInBytes > 0 )
+	{
+		xTotalRegionSize = pxHeapRegion->xSizeInBytes;
+
+		/* Ensure the heap region starts on a correctly aligned boundary. */
+		xAddress = ( size_t ) pxHeapRegion->pucStartAddress;
+		if( ( xAddress & portBYTE_ALIGNMENT_MASK ) != 0 )
+		{
+			xAddress += ( portBYTE_ALIGNMENT - 1 );
+			xAddress &= ~portBYTE_ALIGNMENT_MASK;
+
+			/* Adjust the size for the bytes lost to alignment. */
+			xTotalRegionSize -= xAddress - ( size_t ) pxHeapRegion->pucStartAddress;
+		}
+
+		xAlignedHeap = xAddress;
+
+		/* Set xStart if it has not already been set. */
+		if( xDefinedRegions == 0 )
+		{
+			/* xStart is used to hold a pointer to the first item in the list of
+			free blocks.  The void cast is used to prevent compiler warnings. */
+			xStart.pxNextFreeBlock = ( BlockLink_t * ) xAlignedHeap;
+			xStart.xBlockSize = ( size_t ) 0;
+		}
+		else
+		{
+			/* Should only get here if one region has already been added to the
+			heap. */
+			configASSERT( pxEnd != NULL );
+
+			/* Check blocks are passed in with increasing start addresses. */
+			configASSERT( xAddress > ( size_t ) pxEnd );
+		}
+
+		/* Remember the location of the end marker in the previous region, if
+		any. */
+		pxPreviousFreeBlock = pxEnd;
+
+		/* pxEnd is used to mark the end of the list of free blocks and is
+		inserted at the end of the region space. */
+		xAddress = xAlignedHeap + xTotalRegionSize;
+		xAddress -= xHeapStructSize;
+		xAddress &= ~portBYTE_ALIGNMENT_MASK;
+		pxEnd = ( BlockLink_t * ) xAddress;
+		pxEnd->xBlockSize = 0;
+		pxEnd->pxNextFreeBlock = NULL;
+
+		/* To start with there is a single free block in this region that is
+		sized to take up the entire heap region minus the space taken by the
+		free block structure. */
+		pxFirstFreeBlockInRegion = ( BlockLink_t * ) xAlignedHeap;
+		pxFirstFreeBlockInRegion->xBlockSize = xAddress - ( size_t ) pxFirstFreeBlockInRegion;
+		pxFirstFreeBlockInRegion->pxNextFreeBlock = pxEnd;
+
+		/* If this is not the first region that makes up the entire heap space
+		then link the previous region to this region. */
+		if( pxPreviousFreeBlock != NULL )
+		{
+			pxPreviousFreeBlock->pxNextFreeBlock = pxFirstFreeBlockInRegion;
+		}
+
+		xTotalHeapSize += pxFirstFreeBlockInRegion->xBlockSize;
+
+		/* Move onto the next HeapRegion_t structure. */
+		xDefinedRegions++;
+		pxHeapRegion = &( pxHeapRegions[ xDefinedRegions ] );
+	}
+
+	xMinimumEverFreeBytesRemaining = xTotalHeapSize;
+	xFreeBytesRemaining = xTotalHeapSize;
+
+	/* Check something was actually defined before it is accessed. */
+	configASSERT( xTotalHeapSize );
+
+	/* Work out the position of the top bit in a size_t variable. */
+	xBlockAllocatedBit = ( ( size_t ) 1 ) << ( ( sizeof( size_t ) * heapBITS_PER_BYTE ) - 1 );
+}
+

Source/readme.txt

@@ -0,0 +1,17 @@
+Each real time kernel port consists of three files that contain the core kernel
+components and are common to every port, and one or more files that are 
+specific to a particular microcontroller and or compiler.
+
++ The FreeRTOS/Source directory contains the three files that are common to 
+every port - list.c, queue.c and tasks.c.  The kernel is contained within these 
+three files.  croutine.c implements the optional co-routine functionality - which
+is normally only used on very memory limited systems.
+
++ The FreeRTOS/Source/Portable directory contains the files that are specific to 
+a particular microcontroller and or compiler.
+
++ The FreeRTOS/Source/include directory contains the real time kernel header 
+files.
+
+See the readme file in the FreeRTOS/Source/Portable directory for more 
+information.

Source/string.c

@@ -0,0 +1,90 @@
+#include <string.h>
+#include <stdint.h>
+#include <ctype.h>
+
+void* memcpy(void* dest, const void* src, size_t len)
+{
+  const char* s = src;
+  char *d = dest;
+
+  if ((((uintptr_t)dest | (uintptr_t)src) & (sizeof(uintptr_t)-1)) == 0) {
+    while ((void*)d < (dest + len - (sizeof(uintptr_t)-1))) {
+      *(uintptr_t*)d = *(const uintptr_t*)s;
+      d += sizeof(uintptr_t);
+      s += sizeof(uintptr_t);
+    }
+  }
+
+  while (d < (char*)(dest + len))
+    *d++ = *s++;
+
+  return dest;
+}
+
+void* memset(void* dest, int byte, size_t len)
+{
+  if ((((uintptr_t)dest | len) & (sizeof(uintptr_t)-1)) == 0) {
+    uintptr_t word = byte & 0xFF;
+    word |= word << 8;
+    word |= word << 16;
+    word |= word << 16 << 16;
+
+    uintptr_t *d = dest;
+    while (d < (uintptr_t*)(dest + len))
+      *d++ = word;
+  } else {
+    char *d = dest;
+    while (d < (char*)(dest + len))
+      *d++ = byte;
+  }
+  return dest;
+}
+
+size_t strlen(const char *s)
+{
+  const char *p = s;
+  while (*p)
+    p++;
+  return p - s;
+}
+
+int strcmp(const char* s1, const char* s2)
+{
+  unsigned char c1, c2;
+
+  do {
+    c1 = *s1++;
+    c2 = *s2++;
+  } while (c1 != 0 && c1 == c2);
+
+  return c1 - c2;
+}
+
+char* strcpy(char* dest, const char* src)
+{
+  char* d = dest;
+  while ((*d++ = *src++))
+    ;
+  return dest;
+}
+
+long atol(const char* str)
+{
+  long res = 0;
+  int sign = 0;
+
+  while (*str == ' ')
+    str++;
+
+  if (*str == '-' || *str == '+') {
+    sign = *str == '-';
+    str++;
+  }
+
+  while (*str) {
+    res *= 10;
+    res += *str++ - '0';
+  }
+
+  return sign ? -res : res;
+}

Source/timers.c

@@ -0,0 +1,929 @@
+/*
+    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+/* Standard includes. */
+#include <stdlib.h>
+
+/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
+all the API functions to use the MPU wrappers.  That should only be done when
+task.h is included from an application file. */
+#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+#include "FreeRTOS.h"
+#include "task.h"
+#include "queue.h"
+#include "timers.h"
+
+#if ( INCLUDE_xTimerPendFunctionCall == 1 ) && ( configUSE_TIMERS == 0 )
+	#error configUSE_TIMERS must be set to 1 to make the xTimerPendFunctionCall() function available.
+#endif
+
+/* Lint e961 and e750 are suppressed as a MISRA exception justified because the
+MPU ports require MPU_WRAPPERS_INCLUDED_FROM_API_FILE to be defined for the
+header files above, but not in this file, in order to generate the correct
+privileged Vs unprivileged linkage and placement. */
+#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE /*lint !e961 !e750. */
+
+
+/* This entire source file will be skipped if the application is not configured
+to include software timer functionality.  This #if is closed at the very bottom
+of this file.  If you want to include software timer functionality then ensure
+configUSE_TIMERS is set to 1 in FreeRTOSConfig.h. */
+#if ( configUSE_TIMERS == 1 )
+
+/* Misc definitions. */
+#define tmrNO_DELAY		( TickType_t ) 0U
+
+/* The definition of the timers themselves. */
+typedef struct tmrTimerControl
+{
+	const char				*pcTimerName;		/*<< Text name.  This is not used by the kernel, it is included simply to make debugging easier. */ /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
+	ListItem_t				xTimerListItem;		/*<< Standard linked list item as used by all kernel features for event management. */
+	TickType_t				xTimerPeriodInTicks;/*<< How quickly and often the timer expires. */
+	UBaseType_t				uxAutoReload;		/*<< Set to pdTRUE if the timer should be automatically restarted once expired.  Set to pdFALSE if the timer is, in effect, a one-shot timer. */
+	void 					*pvTimerID;			/*<< An ID to identify the timer.  This allows the timer to be identified when the same callback is used for multiple timers. */
+	TimerCallbackFunction_t	pxCallbackFunction;	/*<< The function that will be called when the timer expires. */
+	#if( configUSE_TRACE_FACILITY == 1 )
+		UBaseType_t			uxTimerNumber;		/*<< An ID assigned by trace tools such as FreeRTOS+Trace */
+	#endif
+} xTIMER;
+
+/* The old xTIMER name is maintained above then typedefed to the new Timer_t
+name below to enable the use of older kernel aware debuggers. */
+typedef xTIMER Timer_t;
+
+/* The definition of messages that can be sent and received on the timer queue.
+Two types of message can be queued - messages that manipulate a software timer,
+and messages that request the execution of a non-timer related callback.  The
+two message types are defined in two separate structures, xTimerParametersType
+and xCallbackParametersType respectively. */
+typedef struct tmrTimerParameters
+{
+	TickType_t			xMessageValue;		/*<< An optional value used by a subset of commands, for example, when changing the period of a timer. */
+	Timer_t *			pxTimer;			/*<< The timer to which the command will be applied. */
+} TimerParameter_t;
+
+
+typedef struct tmrCallbackParameters
+{
+	PendedFunction_t	pxCallbackFunction;	/* << The callback function to execute. */
+	void *pvParameter1;						/* << The value that will be used as the callback functions first parameter. */
+	uint32_t ulParameter2;					/* << The value that will be used as the callback functions second parameter. */
+} CallbackParameters_t;
+
+/* The structure that contains the two message types, along with an identifier
+that is used to determine which message type is valid. */
+typedef struct tmrTimerQueueMessage
+{
+	BaseType_t			xMessageID;			/*<< The command being sent to the timer service task. */
+	union
+	{
+		TimerParameter_t xTimerParameters;
+
+		/* Don't include xCallbackParameters if it is not going to be used as
+		it makes the structure (and therefore the timer queue) larger. */
+		#if ( INCLUDE_xTimerPendFunctionCall == 1 )
+			CallbackParameters_t xCallbackParameters;
+		#endif /* INCLUDE_xTimerPendFunctionCall */
+	} u;
+} DaemonTaskMessage_t;
+
+/*lint -e956 A manual analysis and inspection has been used to determine which
+static variables must be declared volatile. */
+
+/* The list in which active timers are stored.  Timers are referenced in expire
+time order, with the nearest expiry time at the front of the list.  Only the
+timer service task is allowed to access these lists. */
+PRIVILEGED_DATA static List_t xActiveTimerList1;
+PRIVILEGED_DATA static List_t xActiveTimerList2;
+PRIVILEGED_DATA static List_t *pxCurrentTimerList;
+PRIVILEGED_DATA static List_t *pxOverflowTimerList;
+
+/* A queue that is used to send commands to the timer service task. */
+PRIVILEGED_DATA static QueueHandle_t xTimerQueue = NULL;
+
+#if ( INCLUDE_xTimerGetTimerDaemonTaskHandle == 1 )
+
+	PRIVILEGED_DATA static TaskHandle_t xTimerTaskHandle = NULL;
+
+#endif
+
+/*lint +e956 */
+
+/*-----------------------------------------------------------*/
+
+/*
+ * Initialise the infrastructure used by the timer service task if it has not
+ * been initialised already.
+ */
+static void prvCheckForValidListAndQueue( void ) PRIVILEGED_FUNCTION;
+
+/*
+ * The timer service task (daemon).  Timer functionality is controlled by this
+ * task.  Other tasks communicate with the timer service task using the
+ * xTimerQueue queue.
+ */
+static void prvTimerTask( void *pvParameters ) PRIVILEGED_FUNCTION;
+
+/*
+ * Called by the timer service task to interpret and process a command it
+ * received on the timer queue.
+ */
+static void prvProcessReceivedCommands( void ) PRIVILEGED_FUNCTION;
+
+/*
+ * Insert the timer into either xActiveTimerList1, or xActiveTimerList2,
+ * depending on if the expire time causes a timer counter overflow.
+ */
+static BaseType_t prvInsertTimerInActiveList( Timer_t * const pxTimer, const TickType_t xNextExpiryTime, const TickType_t xTimeNow, const TickType_t xCommandTime ) PRIVILEGED_FUNCTION;
+
+/*
+ * An active timer has reached its expire time.  Reload the timer if it is an
+ * auto reload timer, then call its callback.
+ */
+static void prvProcessExpiredTimer( const TickType_t xNextExpireTime, const TickType_t xTimeNow ) PRIVILEGED_FUNCTION;
+
+/*
+ * The tick count has overflowed.  Switch the timer lists after ensuring the
+ * current timer list does not still reference some timers.
+ */
+static void prvSwitchTimerLists( void ) PRIVILEGED_FUNCTION;
+
+/*
+ * Obtain the current tick count, setting *pxTimerListsWereSwitched to pdTRUE
+ * if a tick count overflow occurred since prvSampleTimeNow() was last called.
+ */
+static TickType_t prvSampleTimeNow( BaseType_t * const pxTimerListsWereSwitched ) PRIVILEGED_FUNCTION;
+
+/*
+ * If the timer list contains any active timers then return the expire time of
+ * the timer that will expire first and set *pxListWasEmpty to false.  If the
+ * timer list does not contain any timers then return 0 and set *pxListWasEmpty
+ * to pdTRUE.
+ */
+static TickType_t prvGetNextExpireTime( BaseType_t * const pxListWasEmpty ) PRIVILEGED_FUNCTION;
+
+/*
+ * If a timer has expired, process it.  Otherwise, block the timer service task
+ * until either a timer does expire or a command is received.
+ */
+static void prvProcessTimerOrBlockTask( const TickType_t xNextExpireTime, BaseType_t xListWasEmpty ) PRIVILEGED_FUNCTION;
+
+/*-----------------------------------------------------------*/
+
+BaseType_t xTimerCreateTimerTask( void )
+{
+BaseType_t xReturn = pdFAIL;
+
+	/* This function is called when the scheduler is started if
+	configUSE_TIMERS is set to 1.  Check that the infrastructure used by the
+	timer service task has been created/initialised.  If timers have already
+	been created then the initialisation will already have been performed. */
+	prvCheckForValidListAndQueue();
+
+	if( xTimerQueue != NULL )
+	{
+		#if ( INCLUDE_xTimerGetTimerDaemonTaskHandle == 1 )
+		{
+			/* Create the timer task, storing its handle in xTimerTaskHandle so
+			it can be returned by the xTimerGetTimerDaemonTaskHandle() function. */
+			xReturn = xTaskCreate( prvTimerTask, "Tmr Svc", ( uint16_t ) configTIMER_TASK_STACK_DEPTH, NULL, ( ( UBaseType_t ) configTIMER_TASK_PRIORITY ) | portPRIVILEGE_BIT, &xTimerTaskHandle );
+		}
+		#else
+		{
+			/* Create the timer task without storing its handle. */
+			xReturn = xTaskCreate( prvTimerTask, "Tmr Svc", ( uint16_t ) configTIMER_TASK_STACK_DEPTH, NULL, ( ( UBaseType_t ) configTIMER_TASK_PRIORITY ) | portPRIVILEGE_BIT, NULL);
+		}
+		#endif
+	}
+	else
+	{
+		mtCOVERAGE_TEST_MARKER();
+	}
+
+	configASSERT( xReturn );
+	return xReturn;
+}
+/*-----------------------------------------------------------*/
+
+TimerHandle_t xTimerCreate( const char * const pcTimerName, const TickType_t xTimerPeriodInTicks, const UBaseType_t uxAutoReload, void * const pvTimerID, TimerCallbackFunction_t pxCallbackFunction ) /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
+{
+Timer_t *pxNewTimer;
+
+	/* Allocate the timer structure. */
+	if( xTimerPeriodInTicks == ( TickType_t ) 0U )
+	{
+		pxNewTimer = NULL;
+	}
+	else
+	{
+		pxNewTimer = ( Timer_t * ) pvPortMalloc( sizeof( Timer_t ) );
+		if( pxNewTimer != NULL )
+		{
+			/* Ensure the infrastructure used by the timer service task has been
+			created/initialised. */
+			prvCheckForValidListAndQueue();
+
+			/* Initialise the timer structure members using the function parameters. */
+			pxNewTimer->pcTimerName = pcTimerName;
+			pxNewTimer->xTimerPeriodInTicks = xTimerPeriodInTicks;
+			pxNewTimer->uxAutoReload = uxAutoReload;
+			pxNewTimer->pvTimerID = pvTimerID;
+			pxNewTimer->pxCallbackFunction = pxCallbackFunction;
+			vListInitialiseItem( &( pxNewTimer->xTimerListItem ) );
+
+			traceTIMER_CREATE( pxNewTimer );
+		}
+		else
+		{
+			traceTIMER_CREATE_FAILED();
+		}
+	}
+
+	/* 0 is not a valid value for xTimerPeriodInTicks. */
+	configASSERT( ( xTimerPeriodInTicks > 0 ) );
+
+	return ( TimerHandle_t ) pxNewTimer;
+}
+/*-----------------------------------------------------------*/
+
+BaseType_t xTimerGenericCommand( TimerHandle_t xTimer, const BaseType_t xCommandID, const TickType_t xOptionalValue, BaseType_t * const pxHigherPriorityTaskWoken, const TickType_t xTicksToWait )
+{
+BaseType_t xReturn = pdFAIL;
+DaemonTaskMessage_t xMessage;
+
+	configASSERT( xTimer );
+
+	/* Send a message to the timer service task to perform a particular action
+	on a particular timer definition. */
+	if( xTimerQueue != NULL )
+	{
+		/* Send a command to the timer service task to start the xTimer timer. */
+		xMessage.xMessageID = xCommandID;
+		xMessage.u.xTimerParameters.xMessageValue = xOptionalValue;
+		xMessage.u.xTimerParameters.pxTimer = ( Timer_t * ) xTimer;
+
+		if( xCommandID < tmrFIRST_FROM_ISR_COMMAND )
+		{
+			if( xTaskGetSchedulerState() == taskSCHEDULER_RUNNING )
+			{
+				xReturn = xQueueSendToBack( xTimerQueue, &xMessage, xTicksToWait );
+			}
+			else
+			{
+				xReturn = xQueueSendToBack( xTimerQueue, &xMessage, tmrNO_DELAY );
+			}
+		}
+		else
+		{
+			xReturn = xQueueSendToBackFromISR( xTimerQueue, &xMessage, pxHigherPriorityTaskWoken );
+		}
+
+		traceTIMER_COMMAND_SEND( xTimer, xCommandID, xOptionalValue, xReturn );
+	}
+	else
+	{
+		mtCOVERAGE_TEST_MARKER();
+	}
+
+	return xReturn;
+}
+/*-----------------------------------------------------------*/
+
+#if ( INCLUDE_xTimerGetTimerDaemonTaskHandle == 1 )
+
+	TaskHandle_t xTimerGetTimerDaemonTaskHandle( void )
+	{
+		/* If xTimerGetTimerDaemonTaskHandle() is called before the scheduler has been
+		started, then xTimerTaskHandle will be NULL. */
+		configASSERT( ( xTimerTaskHandle != NULL ) );
+		return xTimerTaskHandle;
+	}
+
+#endif
+/*-----------------------------------------------------------*/
+
+const char * pcTimerGetTimerName( TimerHandle_t xTimer )
+{
+Timer_t *pxTimer = ( Timer_t * ) xTimer;
+
+	configASSERT( xTimer );
+	return pxTimer->pcTimerName;
+}
+/*-----------------------------------------------------------*/
+
+static void prvProcessExpiredTimer( const TickType_t xNextExpireTime, const TickType_t xTimeNow )
+{
+BaseType_t xResult;
+Timer_t * const pxTimer = ( Timer_t * ) listGET_OWNER_OF_HEAD_ENTRY( pxCurrentTimerList );
+
+	/* Remove the timer from the list of active timers.  A check has already
+	been performed to ensure the list is not empty. */
+	( void ) uxListRemove( &( pxTimer->xTimerListItem ) );
+	traceTIMER_EXPIRED( pxTimer );
+
+	/* If the timer is an auto reload timer then calculate the next
+	expiry time and re-insert the timer in the list of active timers. */
+	if( pxTimer->uxAutoReload == ( UBaseType_t ) pdTRUE )
+	{
+		/* The timer is inserted into a list using a time relative to anything
+		other than the current time.  It will therefore be inserted into the
+		correct list relative to the time this task thinks it is now. */
+		if( prvInsertTimerInActiveList( pxTimer, ( xNextExpireTime + pxTimer->xTimerPeriodInTicks ), xTimeNow, xNextExpireTime ) == pdTRUE )
+		{
+			/* The timer expired before it was added to the active timer
+			list.  Reload it now.  */
+			xResult = xTimerGenericCommand( pxTimer, tmrCOMMAND_START_DONT_TRACE, xNextExpireTime, NULL, tmrNO_DELAY );
+			configASSERT( xResult );
+			( void ) xResult;
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+	}
+	else
+	{
+		mtCOVERAGE_TEST_MARKER();
+	}
+
+	/* Call the timer callback. */
+	pxTimer->pxCallbackFunction( ( TimerHandle_t ) pxTimer );
+}
+/*-----------------------------------------------------------*/
+
+static void prvTimerTask( void *pvParameters )
+{
+TickType_t xNextExpireTime;
+BaseType_t xListWasEmpty;
+
+	/* Just to avoid compiler warnings. */
+	( void ) pvParameters;
+
+	for( ;; )
+	{
+		/* Query the timers list to see if it contains any timers, and if so,
+		obtain the time at which the next timer will expire. */
+		xNextExpireTime = prvGetNextExpireTime( &xListWasEmpty );
+
+		/* If a timer has expired, process it.  Otherwise, block this task
+		until either a timer does expire, or a command is received. */
+		prvProcessTimerOrBlockTask( xNextExpireTime, xListWasEmpty );
+
+		/* Empty the command queue. */
+		prvProcessReceivedCommands();
+	}
+}
+/*-----------------------------------------------------------*/
+
+static void prvProcessTimerOrBlockTask( const TickType_t xNextExpireTime, BaseType_t xListWasEmpty )
+{
+TickType_t xTimeNow;
+BaseType_t xTimerListsWereSwitched;
+
+	vTaskSuspendAll();
+	{
+		/* Obtain the time now to make an assessment as to whether the timer
+		has expired or not.  If obtaining the time causes the lists to switch
+		then don't process this timer as any timers that remained in the list
+		when the lists were switched will have been processed within the
+		prvSampleTimeNow() function. */
+		xTimeNow = prvSampleTimeNow( &xTimerListsWereSwitched );
+		if( xTimerListsWereSwitched == pdFALSE )
+		{
+			/* The tick count has not overflowed, has the timer expired? */
+			if( ( xListWasEmpty == pdFALSE ) && ( xNextExpireTime <= xTimeNow ) )
+			{
+				( void ) xTaskResumeAll();
+				prvProcessExpiredTimer( xNextExpireTime, xTimeNow );
+			}
+			else
+			{
+				/* The tick count has not overflowed, and the next expire
+				time has not been reached yet.  This task should therefore
+				block to wait for the next expire time or a command to be
+				received - whichever comes first.  The following line cannot
+				be reached unless xNextExpireTime > xTimeNow, except in the
+				case when the current timer list is empty. */
+				if( xListWasEmpty != pdFALSE )
+				{
+					/* The current timer list is empty - is the overflow list
+					also empty? */
+					xListWasEmpty = listLIST_IS_EMPTY( pxOverflowTimerList );
+				}
+
+				vQueueWaitForMessageRestricted( xTimerQueue, ( xNextExpireTime - xTimeNow ), xListWasEmpty );
+
+				if( xTaskResumeAll() == pdFALSE )
+				{
+					/* Yield to wait for either a command to arrive, or the
+					block time to expire.  If a command arrived between the
+					critical section being exited and this yield then the yield
+					will not cause the task to block. */
+					portYIELD_WITHIN_API();
+				}
+				else
+				{
+					mtCOVERAGE_TEST_MARKER();
+				}
+			}
+		}
+		else
+		{
+			( void ) xTaskResumeAll();
+		}
+	}
+}
+/*-----------------------------------------------------------*/
+
+static TickType_t prvGetNextExpireTime( BaseType_t * const pxListWasEmpty )
+{
+TickType_t xNextExpireTime;
+
+	/* Timers are listed in expiry time order, with the head of the list
+	referencing the task that will expire first.  Obtain the time at which
+	the timer with the nearest expiry time will expire.  If there are no
+	active timers then just set the next expire time to 0.  That will cause
+	this task to unblock when the tick count overflows, at which point the
+	timer lists will be switched and the next expiry time can be
+	re-assessed.  */
+	*pxListWasEmpty = listLIST_IS_EMPTY( pxCurrentTimerList );
+	if( *pxListWasEmpty == pdFALSE )
+	{
+		xNextExpireTime = listGET_ITEM_VALUE_OF_HEAD_ENTRY( pxCurrentTimerList );
+	}
+	else
+	{
+		/* Ensure the task unblocks when the tick count rolls over. */
+		xNextExpireTime = ( TickType_t ) 0U;
+	}
+
+	return xNextExpireTime;
+}
+/*-----------------------------------------------------------*/
+
+static TickType_t prvSampleTimeNow( BaseType_t * const pxTimerListsWereSwitched )
+{
+TickType_t xTimeNow;
+PRIVILEGED_DATA static TickType_t xLastTime = ( TickType_t ) 0U; /*lint !e956 Variable is only accessible to one task. */
+
+	xTimeNow = xTaskGetTickCount();
+
+	if( xTimeNow < xLastTime )
+	{
+		prvSwitchTimerLists();
+		*pxTimerListsWereSwitched = pdTRUE;
+	}
+	else
+	{
+		*pxTimerListsWereSwitched = pdFALSE;
+	}
+
+	xLastTime = xTimeNow;
+
+	return xTimeNow;
+}
+/*-----------------------------------------------------------*/
+
+static BaseType_t prvInsertTimerInActiveList( Timer_t * const pxTimer, const TickType_t xNextExpiryTime, const TickType_t xTimeNow, const TickType_t xCommandTime )
+{
+BaseType_t xProcessTimerNow = pdFALSE;
+
+	listSET_LIST_ITEM_VALUE( &( pxTimer->xTimerListItem ), xNextExpiryTime );
+	listSET_LIST_ITEM_OWNER( &( pxTimer->xTimerListItem ), pxTimer );
+
+	if( xNextExpiryTime <= xTimeNow )
+	{
+		/* Has the expiry time elapsed between the command to start/reset a
+		timer was issued, and the time the command was processed? */
+		if( ( xTimeNow - xCommandTime ) >= pxTimer->xTimerPeriodInTicks )
+		{
+			/* The time between a command being issued and the command being
+			processed actually exceeds the timers period.  */
+			xProcessTimerNow = pdTRUE;
+		}
+		else
+		{
+			vListInsert( pxOverflowTimerList, &( pxTimer->xTimerListItem ) );
+		}
+	}
+	else
+	{
+		if( ( xTimeNow < xCommandTime ) && ( xNextExpiryTime >= xCommandTime ) )
+		{
+			/* If, since the command was issued, the tick count has overflowed
+			but the expiry time has not, then the timer must have already passed
+			its expiry time and should be processed immediately. */
+			xProcessTimerNow = pdTRUE;
+		}
+		else
+		{
+			vListInsert( pxCurrentTimerList, &( pxTimer->xTimerListItem ) );
+		}
+	}
+
+	return xProcessTimerNow;
+}
+/*-----------------------------------------------------------*/
+
+static void	prvProcessReceivedCommands( void )
+{
+DaemonTaskMessage_t xMessage;
+Timer_t *pxTimer;
+BaseType_t xTimerListsWereSwitched, xResult;
+TickType_t xTimeNow;
+
+	while( xQueueReceive( xTimerQueue, &xMessage, tmrNO_DELAY ) != pdFAIL ) /*lint !e603 xMessage does not have to be initialised as it is passed out, not in, and it is not used unless xQueueReceive() returns pdTRUE. */
+	{
+		#if ( INCLUDE_xTimerPendFunctionCall == 1 )
+		{
+			/* Negative commands are pended function calls rather than timer
+			commands. */
+			if( xMessage.xMessageID < ( BaseType_t ) 0 )
+			{
+				const CallbackParameters_t * const pxCallback = &( xMessage.u.xCallbackParameters );
+
+				/* The timer uses the xCallbackParameters member to request a
+				callback be executed.  Check the callback is not NULL. */
+				configASSERT( pxCallback );
+
+				/* Call the function. */
+				pxCallback->pxCallbackFunction( pxCallback->pvParameter1, pxCallback->ulParameter2 );
+			}
+			else
+			{
+				mtCOVERAGE_TEST_MARKER();
+			}
+		}
+		#endif /* INCLUDE_xTimerPendFunctionCall */
+
+		/* Commands that are positive are timer commands rather than pended
+		function calls. */
+		if( xMessage.xMessageID >= ( BaseType_t ) 0 )
+		{
+			/* The messages uses the xTimerParameters member to work on a
+			software timer. */
+			pxTimer = xMessage.u.xTimerParameters.pxTimer;
+
+			if( listIS_CONTAINED_WITHIN( NULL, &( pxTimer->xTimerListItem ) ) == pdFALSE )
+			{
+				/* The timer is in a list, remove it. */
+				( void ) uxListRemove( &( pxTimer->xTimerListItem ) );
+			}
+			else
+			{
+				mtCOVERAGE_TEST_MARKER();
+			}
+
+			traceTIMER_COMMAND_RECEIVED( pxTimer, xMessage.xMessageID, xMessage.u.xTimerParameters.xMessageValue );
+
+			/* In this case the xTimerListsWereSwitched parameter is not used, but
+			it must be present in the function call.  prvSampleTimeNow() must be
+			called after the message is received from xTimerQueue so there is no
+			possibility of a higher priority task adding a message to the message
+			queue with a time that is ahead of the timer daemon task (because it
+			pre-empted the timer daemon task after the xTimeNow value was set). */
+			xTimeNow = prvSampleTimeNow( &xTimerListsWereSwitched );
+
+			switch( xMessage.xMessageID )
+			{
+				case tmrCOMMAND_START :
+			    case tmrCOMMAND_START_FROM_ISR :
+			    case tmrCOMMAND_RESET :
+			    case tmrCOMMAND_RESET_FROM_ISR :
+				case tmrCOMMAND_START_DONT_TRACE :
+					/* Start or restart a timer. */
+					if( prvInsertTimerInActiveList( pxTimer,  xMessage.u.xTimerParameters.xMessageValue + pxTimer->xTimerPeriodInTicks, xTimeNow, xMessage.u.xTimerParameters.xMessageValue ) == pdTRUE )
+					{
+						/* The timer expired before it was added to the active
+						timer list.  Process it now. */
+						pxTimer->pxCallbackFunction( ( TimerHandle_t ) pxTimer );
+						traceTIMER_EXPIRED( pxTimer );
+
+						if( pxTimer->uxAutoReload == ( UBaseType_t ) pdTRUE )
+						{
+							xResult = xTimerGenericCommand( pxTimer, tmrCOMMAND_START_DONT_TRACE, xMessage.u.xTimerParameters.xMessageValue + pxTimer->xTimerPeriodInTicks, NULL, tmrNO_DELAY );
+							configASSERT( xResult );
+							( void ) xResult;
+						}
+						else
+						{
+							mtCOVERAGE_TEST_MARKER();
+						}
+					}
+					else
+					{
+						mtCOVERAGE_TEST_MARKER();
+					}
+					break;
+
+				case tmrCOMMAND_STOP :
+				case tmrCOMMAND_STOP_FROM_ISR :
+					/* The timer has already been removed from the active list.
+					There is nothing to do here. */
+					break;
+
+				case tmrCOMMAND_CHANGE_PERIOD :
+				case tmrCOMMAND_CHANGE_PERIOD_FROM_ISR :
+					pxTimer->xTimerPeriodInTicks = xMessage.u.xTimerParameters.xMessageValue;
+					configASSERT( ( pxTimer->xTimerPeriodInTicks > 0 ) );
+
+					/* The new period does not really have a reference, and can be
+					longer or shorter than the old one.  The command time is
+					therefore set to the current time, and as the period cannot be
+					zero the next expiry time can only be in the future, meaning
+					(unlike for the xTimerStart() case above) there is no fail case
+					that needs to be handled here. */
+					( void ) prvInsertTimerInActiveList( pxTimer, ( xTimeNow + pxTimer->xTimerPeriodInTicks ), xTimeNow, xTimeNow );
+					break;
+
+				case tmrCOMMAND_DELETE :
+					/* The timer has already been removed from the active list,
+					just free up the memory. */
+					vPortFree( pxTimer );
+					break;
+
+				default	:
+					/* Don't expect to get here. */
+					break;
+			}
+		}
+	}
+}
+/*-----------------------------------------------------------*/
+
+static void prvSwitchTimerLists( void )
+{
+TickType_t xNextExpireTime, xReloadTime;
+List_t *pxTemp;
+Timer_t *pxTimer;
+BaseType_t xResult;
+
+	/* The tick count has overflowed.  The timer lists must be switched.
+	If there are any timers still referenced from the current timer list
+	then they must have expired and should be processed before the lists
+	are switched. */
+	while( listLIST_IS_EMPTY( pxCurrentTimerList ) == pdFALSE )
+	{
+		xNextExpireTime = listGET_ITEM_VALUE_OF_HEAD_ENTRY( pxCurrentTimerList );
+
+		/* Remove the timer from the list. */
+		pxTimer = ( Timer_t * ) listGET_OWNER_OF_HEAD_ENTRY( pxCurrentTimerList );
+		( void ) uxListRemove( &( pxTimer->xTimerListItem ) );
+		traceTIMER_EXPIRED( pxTimer );
+
+		/* Execute its callback, then send a command to restart the timer if
+		it is an auto-reload timer.  It cannot be restarted here as the lists
+		have not yet been switched. */
+		pxTimer->pxCallbackFunction( ( TimerHandle_t ) pxTimer );
+
+		if( pxTimer->uxAutoReload == ( UBaseType_t ) pdTRUE )
+		{
+			/* Calculate the reload value, and if the reload value results in
+			the timer going into the same timer list then it has already expired
+			and the timer should be re-inserted into the current list so it is
+			processed again within this loop.  Otherwise a command should be sent
+			to restart the timer to ensure it is only inserted into a list after
+			the lists have been swapped. */
+			xReloadTime = ( xNextExpireTime + pxTimer->xTimerPeriodInTicks );
+			if( xReloadTime > xNextExpireTime )
+			{
+				listSET_LIST_ITEM_VALUE( &( pxTimer->xTimerListItem ), xReloadTime );
+				listSET_LIST_ITEM_OWNER( &( pxTimer->xTimerListItem ), pxTimer );
+				vListInsert( pxCurrentTimerList, &( pxTimer->xTimerListItem ) );
+			}
+			else
+			{
+				xResult = xTimerGenericCommand( pxTimer, tmrCOMMAND_START_DONT_TRACE, xNextExpireTime, NULL, tmrNO_DELAY );
+				configASSERT( xResult );
+				( void ) xResult;
+			}
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+	}
+
+	pxTemp = pxCurrentTimerList;
+	pxCurrentTimerList = pxOverflowTimerList;
+	pxOverflowTimerList = pxTemp;
+}
+/*-----------------------------------------------------------*/
+
+static void prvCheckForValidListAndQueue( void )
+{
+	/* Check that the list from which active timers are referenced, and the
+	queue used to communicate with the timer service, have been
+	initialised. */
+	taskENTER_CRITICAL();
+	{
+		if( xTimerQueue == NULL )
+		{
+			vListInitialise( &xActiveTimerList1 );
+			vListInitialise( &xActiveTimerList2 );
+			pxCurrentTimerList = &xActiveTimerList1;
+			pxOverflowTimerList = &xActiveTimerList2;
+			xTimerQueue = xQueueCreate( ( UBaseType_t ) configTIMER_QUEUE_LENGTH, sizeof( DaemonTaskMessage_t ) );
+			configASSERT( xTimerQueue );
+
+			#if ( configQUEUE_REGISTRY_SIZE > 0 )
+			{
+				if( xTimerQueue != NULL )
+				{
+					vQueueAddToRegistry( xTimerQueue, "TmrQ" );
+				}
+				else
+				{
+					mtCOVERAGE_TEST_MARKER();
+				}
+			}
+			#endif /* configQUEUE_REGISTRY_SIZE */
+		}
+		else
+		{
+			mtCOVERAGE_TEST_MARKER();
+		}
+	}
+	taskEXIT_CRITICAL();
+}
+/*-----------------------------------------------------------*/
+
+BaseType_t xTimerIsTimerActive( TimerHandle_t xTimer )
+{
+BaseType_t xTimerIsInActiveList;
+Timer_t *pxTimer = ( Timer_t * ) xTimer;
+
+	configASSERT( xTimer );
+
+	/* Is the timer in the list of active timers? */
+	taskENTER_CRITICAL();
+	{
+		/* Checking to see if it is in the NULL list in effect checks to see if
+		it is referenced from either the current or the overflow timer lists in
+		one go, but the logic has to be reversed, hence the '!'. */
+		xTimerIsInActiveList = ( BaseType_t ) !( listIS_CONTAINED_WITHIN( NULL, &( pxTimer->xTimerListItem ) ) );
+	}
+	taskEXIT_CRITICAL();
+
+	return xTimerIsInActiveList;
+} /*lint !e818 Can't be pointer to const due to the typedef. */
+/*-----------------------------------------------------------*/
+
+void *pvTimerGetTimerID( const TimerHandle_t xTimer )
+{
+Timer_t * const pxTimer = ( Timer_t * ) xTimer;
+void *pvReturn;
+
+	configASSERT( xTimer );
+
+	taskENTER_CRITICAL();
+	{
+		pvReturn = pxTimer->pvTimerID;
+	}
+	taskEXIT_CRITICAL();
+
+	return pvReturn;
+}
+/*-----------------------------------------------------------*/
+
+void vTimerSetTimerID( TimerHandle_t xTimer, void *pvNewID )
+{
+Timer_t * const pxTimer = ( Timer_t * ) xTimer;
+
+	configASSERT( xTimer );
+
+	taskENTER_CRITICAL();
+	{
+		pxTimer->pvTimerID = pvNewID;
+	}
+	taskEXIT_CRITICAL();
+}
+/*-----------------------------------------------------------*/
+
+#if( INCLUDE_xTimerPendFunctionCall == 1 )
+
+	BaseType_t xTimerPendFunctionCallFromISR( PendedFunction_t xFunctionToPend, void *pvParameter1, uint32_t ulParameter2, BaseType_t *pxHigherPriorityTaskWoken )
+	{
+	DaemonTaskMessage_t xMessage;
+	BaseType_t xReturn;
+
+		/* Complete the message with the function parameters and post it to the
+		daemon task. */
+		xMessage.xMessageID = tmrCOMMAND_EXECUTE_CALLBACK_FROM_ISR;
+		xMessage.u.xCallbackParameters.pxCallbackFunction = xFunctionToPend;
+		xMessage.u.xCallbackParameters.pvParameter1 = pvParameter1;
+		xMessage.u.xCallbackParameters.ulParameter2 = ulParameter2;
+
+		xReturn = xQueueSendFromISR( xTimerQueue, &xMessage, pxHigherPriorityTaskWoken );
+
+		tracePEND_FUNC_CALL_FROM_ISR( xFunctionToPend, pvParameter1, ulParameter2, xReturn );
+
+		return xReturn;
+	}
+
+#endif /* INCLUDE_xTimerPendFunctionCall */
+/*-----------------------------------------------------------*/
+
+#if( INCLUDE_xTimerPendFunctionCall == 1 )
+
+	BaseType_t xTimerPendFunctionCall( PendedFunction_t xFunctionToPend, void *pvParameter1, uint32_t ulParameter2, TickType_t xTicksToWait )
+	{
+	DaemonTaskMessage_t xMessage;
+	BaseType_t xReturn;
+
+		/* This function can only be called after a timer has been created or
+		after the scheduler has been started because, until then, the timer
+		queue does not exist. */
+		configASSERT( xTimerQueue );
+
+		/* Complete the message with the function parameters and post it to the
+		daemon task. */
+		xMessage.xMessageID = tmrCOMMAND_EXECUTE_CALLBACK;
+		xMessage.u.xCallbackParameters.pxCallbackFunction = xFunctionToPend;
+		xMessage.u.xCallbackParameters.pvParameter1 = pvParameter1;
+		xMessage.u.xCallbackParameters.ulParameter2 = ulParameter2;
+
+		xReturn = xQueueSendToBack( xTimerQueue, &xMessage, xTicksToWait );
+
+		tracePEND_FUNC_CALL( xFunctionToPend, pvParameter1, ulParameter2, xReturn );
+
+		return xReturn;
+	}
+
+#endif /* INCLUDE_xTimerPendFunctionCall */
+/*-----------------------------------------------------------*/
+
+/* This entire source file will be skipped if the application is not configured
+to include software timer functionality.  If you want to include software timer
+functionality then ensure configUSE_TIMERS is set to 1 in FreeRTOSConfig.h. */
+#endif /* configUSE_TIMERS == 1 */
+
+
+

__f

@@ -0,0 +1,74 @@
+.
+./README.md
+./.gitignore
+./Source
+./Source/timers.c
+./Source/portable
+./Source/portable/GCC
+./Source/portable/GCC/RISCV
+./Source/portable/GCC/RISCV/portmacro.h
+./Source/portable/GCC/RISCV/port.c
+./Source/portable/GCC/RISCV/portasm.S
+./Source/portable/MemMang
+./Source/portable/MemMang/heap_5.c
+./Source/portable/MemMang/heap_4.c
+./Source/portable/MemMang/heap_1.c
+./Source/portable/MemMang/heap_3.c
+./Source/portable/MemMang/heap_2.c
+./Source/string.c
+./Source/queue.c
+./Source/event_groups.c
+./Source/include
+./Source/include/event_groups.h
+./Source/include/croutine.h
+./Source/include/projdefs.h
+./Source/include/FreeRTOSConfig.h
+./Source/include/task.h
+./Source/include/mpu_wrappers.h
+./Source/include/semphr.h
+./Source/include/deprecated_definitions.h
+./Source/include/timers.h
+./Source/include/StackMacros.h
+./Source/include/queue.h
+./Source/include/stdint.readme
+./Source/include/FreeRTOS.h
+./Source/include/list.h
+./Source/include/portable.h
+./Source/include/FreeRTOS.h.gch
+./Source/include/gpio.h
+./Source/include/interrupt.h
+./Source/include/murax.h
+./Source/include/prescaler.h
+./Source/include/timer.h
+./Source/include/uart.h
+./Source/readme.txt
+./Source/list.c
+./Source/croutine.c
+./Source/tasks.c
+./Demo
+./Demo/arch
+./Demo/arch/clib.c
+./Demo/arch/clib.h
+./Demo/arch/boot.S
+./Demo/arch/vexriscv
+./Demo/arch/vexriscv/gpio.h
+./Demo/arch/vexriscv/interrupt.h
+./Demo/arch/vexriscv/murax.h
+./Demo/arch/vexriscv/prescaler.h
+./Demo/arch/vexriscv/timer.h
+./Demo/arch/vexriscv/uart.h
+./Demo/arch/systemPort.c
+./Demo/arch/link.ld
+./Demo/Common
+./Demo/Common/.gdb_history
+./Demo/Common/FreeRTOS-openocd.c
+./Demo/Common/Makefile
+./Demo/Common/main.cpp
+./Demo/Common/bin
+./Demo/conf
+./Demo/conf/FreeRTOSConfig.h
+./gdb.txt
+./.gdb_history
+./tags
+./__t
+./__f

__t

@@ -0,0 +1,72 @@
+.
+|-- Demo
+|   |-- Common
+|   |   |-- FreeRTOS-openocd.c
+|   |   |-- Makefile
+|   |   |-- bin
+|   |   `-- main.cpp
+|   |-- arch
+|   |   |-- boot.S
+|   |   |-- clib.c
+|   |   |-- clib.h
+|   |   |-- link.ld
+|   |   |-- systemPort.c
+|   |   `-- vexriscv
+|   |       |-- gpio.h
+|   |       |-- interrupt.h
+|   |       |-- murax.h
+|   |       |-- prescaler.h
+|   |       |-- timer.h
+|   |       `-- uart.h
+|   `-- conf
+|       `-- FreeRTOSConfig.h
+|-- README.md
+|-- Source
+|   |-- croutine.c
+|   |-- event_groups.c
+|   |-- include
+|   |   |-- FreeRTOS.h
+|   |   |-- FreeRTOS.h.gch
+|   |   |-- FreeRTOSConfig.h
+|   |   |-- StackMacros.h
+|   |   |-- croutine.h
+|   |   |-- deprecated_definitions.h
+|   |   |-- event_groups.h
+|   |   |-- gpio.h
+|   |   |-- interrupt.h
+|   |   |-- list.h
+|   |   |-- mpu_wrappers.h
+|   |   |-- murax.h
+|   |   |-- portable.h
+|   |   |-- prescaler.h
+|   |   |-- projdefs.h
+|   |   |-- queue.h
+|   |   |-- semphr.h
+|   |   |-- stdint.readme
+|   |   |-- task.h
+|   |   |-- timer.h
+|   |   |-- timers.h
+|   |   `-- uart.h
+|   |-- list.c
+|   |-- portable
+|   |   |-- GCC
+|   |   |   `-- RISCV
+|   |   |       |-- port.c
+|   |   |       |-- portasm.S
+|   |   |       `-- portmacro.h
+|   |   `-- MemMang
+|   |       |-- heap_1.c
+|   |       |-- heap_2.c
+|   |       |-- heap_3.c
+|   |       |-- heap_4.c
+|   |       `-- heap_5.c
+|   |-- queue.c
+|   |-- readme.txt
+|   |-- string.c
+|   |-- tasks.c
+|   `-- timers.c
+|-- __t
+|-- gdb.txt
+`-- tags
+
+13 directories, 57 files