pio_example1_rainbow_lights.c

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

#include "pio.h"

#define SUCCESS 0;

#define CPU_HZ 20000000
#define NUMBER_OF_COLORS 4

/* leds */
#define LEFT 0
#define RIGHT 1

/* colors */
#define BLACK 0x00
#define RED 0x01
#define GREEN 0x04
#define BLUE 0x10



/*
PORTC[7..0] controls the RGB-leds in the following way:

PIN  CONNECTION
 7               X
 6               X
 5        Right led
 4        Left led
 3        Right led
 2        Left led
 1        Right led
 0        Left led

Where:
X - No connection
R - Right
L - Left

That means that the color of the left RGB-led is driven by the pins
0, 2 & 4, while the right one is driven by 1, 3 & 5. The combination of
these 3 bits puts out a color on the RGB-leds. These 3 bits can be 
combined to create additional colors.

This example will run a set of colors on the rgb-leds on the STK1000. 
To get it to work, connect a cable from J3 to J20 on the STK1000.

*/

/* prototype */
void delay( void );

int main( void )
{
  int i;
  int color_array[NUMBER_OF_COLORS]={RED,GREEN,BLUE,BLACK};

  /* Set up a pio structure to point at PIOC's base address */
  volatile avr32_pio_t *pioc = &AVR32_PIOC;

  pioc->per = 0x000000ff; /* Set pio enable for 16 LSBs of PORTB */
  pioc->oer = 0x000000ff; /* Make them output ports */
  pioc->idr = 0x000000ff; /* Disable interrupts on these pins */
  pioc->puer = 0x00000ff; /* Enable pull-ups */



  while(1){
    for(i=0; i<NUMBER_OF_COLORS; i++){
 
      /* Clear the RGB-color for the right/left RGB led*/
      pioc->codr = 0x000000ff;
      
      /* Set the current RGB-color to the left and right RGB led*/
      pioc->sodr = color_array[i] | color_array[i]<<1;
      delay();
   }
  }

  return SUCCESS;
}

void delay( void )
{
  int i;

  for (i=0; i<CPU_HZ/4; i++);
}

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