pio_example2_dip_switch_lights.c

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#include "pio.h"

#ifdef __GNUC__
        #include <avr32/io.h>
#elif __ICCAVR32__
        #include <avr32/ioap7000.h>
#else
        #error No known compiler used
#endif

#define INPUT_MASK 0x000000ff
#define OUTPUT_MASK 0x000000ff

#define SUCCESS 0


int main( void )
{
  volatile avr32_pio_t *piob = &AVR32_PIOB;
  volatile avr32_pio_t *pioc = &AVR32_PIOC;
  unsigned int input, output;

  pioc->per = OUTPUT_MASK; 
  piob->per = INPUT_MASK;

  pioc->oer = OUTPUT_MASK;
  pioc->puer = OUTPUT_MASK;
  pioc->codr = OUTPUT_MASK;
  piob->codr = INPUT_MASK;
 
  while(1){
    input = ( piob->pdsr & INPUT_MASK); /* get input */
    output = ( pioc->pdsr & OUTPUT_MASK); /* get output */

    if ( output != input){
      pioc->codr = OUTPUT_MASK;  /* clear output */
      pioc->sodr = (~input & OUTPUT_MASK); /* set output from input */
    }

  }
  return SUCCESS;
}

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