IRQ on PCI Development Kit, Cyclone II Edition

Altera_Forum · ‎01-25-2011

Hello i've used IRQ without any problems in the DE2 but it isn't working in this kit (PCI Cyclone II)

My IRQ code is the following..


int main()
{
// Enable all 4 button interrupts.
IOWR_ALTERA_AVALON_PIO_IRQ_MASK(PIO_0_BASE, 0xf);
// Reset the edge capture register.
IOWR_ALTERA_AVALON_PIO_EDGE_CAP(PIO_0_BASE, 0x0);
// Register the interrupt handler.
alt_irq_register( PIO_0_IRQ,&edge_capture, handle_button_interrupts );
alt_irq_enable_all;
alt_printf("loop start\n");
while(1)
{
    usleep(100000);
    alt_printf("%x",IORD_ALTERA_AVALON_PIO_DATA(PIO_0_BASE));
    //if(led==1)
//    {
//        led = 2;
    //    initdma();
    //   printf("content of fifo:before DMA operation\n");
    //        for ( i=0;i<32;i++)
    //       {
    //        printf("%d: %x\n",i,IORD(FIFOWRAPPER_0_BASE,0));
    //       }
//    }
//    if (led==2){
    //    alt_printf("FIM");
    //    while (1){}
    //        initdma();}
    //    }
    }
    //alt_printf("%i:",led);
//}
return 0;
}
static void handle_button_interrupts(void* context, alt_u32 id)
{
// Cast context to edge_capture&#39;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&#39;s edge capture register in *context.
*edge_capture_ptr = IORD_ALTERA_AVALON_PIO_EDGE_CAP(PIO_0_BASE);
// Reset the Button&#39;s edge capture register.
IOWR_ALTERA_AVALON_PIO_EDGE_CAP(PIO_0_BASE, 0);
led=1;
//initdma();
// irq_count++;
}

I am basically counting up to 50 seconds and it should generate an IRQ.. My valid is connected to a input PIO in the sopc.

//always@(posedge clk_1 or negedge resete)
//begin
//if(~resete)
//    begin
//        contador <= 0;
//        soma <= 0;
//        valid <= 0;
//    end
//else
//begin
//valid <= 1;
////contador <= contador +1;
////valid <= 0;
////    if(contador==100000000)
////    begin
////        contador<=0;
////        soma <= soma+1;
////    end
////    if (soma==50)
////    begin
////        valid<=1;
////    end
//end

That's very weird.. the exactly same verilog/ C code works for my DE2 project, why should it be different for the PCI kit?