Interruption problem with buttons

[Altera_Forum]

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; }