push_button irq handler question

Try just displaying a binary count on the LEDs, this should increment once per button push. The usleep call should take care of debounce.

# include "unistd.h" //provides usleep function

unsigned int gCount //global counter

static void handle_button_interrupts(void* context, alt_u32 id)

{

gCount++;

IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE, (gCount & 0x0F));

usleep(1000); //wait for 1 ms before clearing the button

IOWR_ALTERA_AVALON_PIO_EDGE_CAP(BUTTON_PIO_BASE, 0);

}

in init_button_pio() add the line "gCount = 0;"

This should show a binary count on the LEDs that increments each time the interrupt occurs.