problem with interrupts

I have an example (it works fine):

# include "test_II.h"# define switches_base 0x00101030# define leds_base 0x00101000# define push_base 0x00101020

// *** Maneja la interrupcion ****

static void push_isr(void* context, alt_u32 id){

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

*function=IORD_ALTERA_AVALON_PIO_EDGE_CAP(push_base);

IOWR_ALTERA_AVALON_PIO_EDGE_CAP(push_base,0);

IOWR_ALTERA_AVALON_PIO_IRQ_MASK(push_base,0xF);

}

//*************************************

int main(void)

{ volatile int function=0;

alt_u32 switches;

// Activas la interrupcion.

IOWR_ALTERA_AVALON_PIO_IRQ_MASK(push_base,0xF);

alt_irq_register(PUSH_IRQ,(void*)&function, push_isr);

while(1){

switch(function){

case 0x1:

switches= IORD_ALTERA_AVALON_PIO_DATA(switches_base);

IOWR_ALTERA_AVALON_PIO_DATA(leds_base,switches);

function=0;

break;

default:

break;

}

}

return 0;

}

Maybe it could help you...