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