irq/src/main.cpp

/*
 * Subject: Interrupt Controller (IRQ), irq@MuraxSoc (RV32I)
 * Lang: Asm, C, C++ (Father of all programming languages)
 * OS: Bare Metal @verilated MuraxSoc
 * Tested: gdb@jtag
 * Authored: mpabi@2024/PI
 */

#include <stdint.h>

#include "murax.h"

void print(const char*str){
	while(*str){
//		uart_write(UART,*str);
		str++;
	}
}
void println(const char*str){
	print(str);
//	uart_write(UART,'\n');
}

volatile int mati = 0;


// 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);
// ---

int main() {

//      println("hello world arty a7 v1");


        interruptCtrl_init(TIMER_INTERRUPT);
        prescaler_init(TIMER_PRESCALER);
        timer_init(TIMER_A);

        TIMER_PRESCALER->LIMIT = 0x10;

        TIMER_A->LIMIT = 0x10000-1;
        TIMER_A->CLEARS_TICKS = 0x10002;

        TIMER_INTERRUPT->PENDINGS = 0xF;
        TIMER_INTERRUPT->MASKS = 0x1;

    while(1){
    
    ++mati;
    }
}

extern "C" void irqCallback(){

static volatile int count = 0;
    ++count;
   TIMER_INTERRUPT->PENDINGS = 1;

}