Interruption problem with buttons

Hello,

I have a problem generating interruptions. I had a design which was working with buttons on pooling. I then changed conditions in SOPC and put synchronously capture on rising edge and generate irq on edge. The number of my irq is 1. I compiled my design again and put the following program which I adapted from the program provided by Atlera (count_binary).

when I press a button, 3 leds light on which corresponds to the default case of my function handle_button_press.

Did I forget something in Quartus II for handling interruptions?

Please help !

Myriam

Program :

static void handle_button_interrupts(void* context, alt_u32 id)

{

/* Cast context to edge_capture's type. It is important that this be

* declared volatile to avoid unwanted compiler optimization.

*/

volatile int* edge_capture_ptr = (volatile int*) context;

/* Store the value in the Button's edge capture register in *context. */

*edge_capture_ptr = IORD_ALTERA_AVALON_PIO_EDGE_CAP(BUTTON_PIO_BASE);

/* Reset the Button's edge capture register. */

IOWR_ALTERA_AVALON_PIO_EDGE_CAP(BUTTON_PIO_BASE, 0);

IORD_ALTERA_AVALON_PIO_EDGE_CAP(BUTTON_PIO_BASE); //An extra read call to clear of delay through the bridge

}

/* Initialize the button_pio. */

static void init_button_pio()

{

/* Recast the edge_capture pointer to match the alt_irq_register() function

* prototype. */

void* edge_capture_ptr = (void*) &edge_capture;

/* Enable all 4 button interrupts. */

IOWR_ALTERA_AVALON_PIO_IRQ_MASK(BUTTON_PIO_BASE, 0xf);

/* Reset the edge capture register. */

IOWR_ALTERA_AVALON_PIO_EDGE_CAP(BUTTON_PIO_BASE, 0x0);

/* Register the interrupt handler. */

alt_irq_register( BUTTON_PIO_IRQ, edge_capture_ptr,

handle_button_interrupts );

}

static void handle_button_press()

{

if (edge_capture!=0) printf ("Gloupix : %d",edge_capture);

switch (edge_capture)

{

case 0x1:

IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE, 0x1);

break;

case 0x2:

IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE, 0x2);

break;

case 0x4:

IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE, 0x4);

break;

case 0x8:

IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE, 0x8);

break;

default:

IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE, 0xE);

break;

}

}

int main(void)

{

init_button_pio();

while( 1 )

{

handle_button_press();

}

return 0;

}