demo interrupt

Hello,

I try to make a simple demo program for interrupt TIMER on my DE2.

Every second the LEDs on "SORTIES" port whill change.

It does'nt work, could you help me .... In debug mode , i placed a breakpoint in the interrupt routine, but it is never expected.

# include "sys/alt_stdio.h"

# include "system.h"

# include "altera_avalon_pio_regs.h"

# include "altera_avalon_timer_regs.h"

# include "sys/alt_irq.h"

volatile unsigned int contexte_pour_IT; // sauvegarde du contexte de l'IT

static void timer_flash(void* context)

{static unsigned char n=0;

n^=0xFF; // toggle bits

// clear flag IT

//IOWR(TIMER_0_BASE,ALTERA_AVALON_TIMER_STATUS_REG,ALTERA_AVALON_TIMER_STATUS_TO_OFST);

IOWR_ALTERA_AVALON_TIMER_STATUS(TIMER_0_BASE,ALTERA_AVALON_TIMER_STATUS_REG);

IOWR(SORTIES_BASE,0,n);

}

int main()

{

void* Timer_IT_ptr= (void*) &contexte_pour_IT;

IOWR(TIMER_0_BASE,ALTERA_AVALON_TIMER_CONTROL_REG,ALTERA_AVALON_TIMER_CONTROL_ITO_MSK);

IOWR(TIMER_0_BASE,ALTERA_AVALON_TIMER_PERIODL_REG,0x3E8);

IOWR(TIMER_0_BASE,ALTERA_AVALON_TIMER_PERIODH_REG,0);

alt_ic_isr_register(TIMER_0_IRQ_INTERRUPT_CONTROLLER_ID,TIMER_0_IRQ,timer_flash,Timer_IT_ptr,0);

alt_irq_init(TIMER_0_BASE);

while(1);

}