interrupt_example_gcc.c

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/* NOTE:
    To get this example to work on your stk1000, connect J6 to J15 and J3 to 
    J25. You can then press the switches to generate an interrupt. The 
    corresponding led will be lit to indicate that the interrupt has triggered.

    This appnote uses the PIO controller. The settings and configuration of the 
    PIO controller is not a part of this appnote. Please read the appnote "Using 
    the AVR32 pio controller" for further information.


*/

#include <avr32/io.h>
#include <sys/interrupts.h>

#define SUCCESS 0;
#define FAILURE -1;

#define INPUT_MASK 0x000000ff
#define OUTPUT_MASK 0x0000ff00

__int_handler *pioc_int_handler()
{
  volatile struct avr32_pio_t *pioc = &AVR32_PIOC;
  int status;

  status = pioc->isr;
  status = pioc->pdsr;

  pioc->odsr =~(status&INPUT_MASK)<<8; /* set led */

  return (void *) 0;
}

int main( void )
{
  volatile struct avr32_pio_t *pioc = &AVR32_PIOC;

  /* 
  Setup the PIO controller. Set PIOC[8..15] as output, PIOC[0..7] as input.
  To get this to work on your stk1000, connect J6 to J15 and J3 to J25
  */

  pioc->odr= INPUT_MASK;
  pioc->per = OUTPUT_MASK;
  pioc->oer = OUTPUT_MASK;
  pioc->codr = INPUT_MASK & OUTPUT_MASK;
  pioc->puer = INPUT_MASK & OUTPUT_MASK;
  pioc->idr &= ~INPUT_MASK;
  pioc->ier = INPUT_MASK;
  pioc->ower = OUTPUT_MASK;


  /* Setup the interrupt handler, handled by newlib */
  set_interrupts_base( (void *) AVR32_INTC_ADDRESS );
  /* register_intterupt( (__int_handler) {func}, {GROUP}, {LINE}, {LEVEL} ); */ 
  register_interrupt( (__int_handler) (pioc_int_handler), AVR32_PIOC_IRQ/32, AVR32_PIOC_IRQ % 32, INT0);
  init_interrupts();

  while(1);

  return 0;
}

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