/*  Copyleft (!C) 2003 C. Manders,
   (http://www.gnu.org/copyleft/gpl.html);
 */


#include <inttypes.h>
#include <avr/io.h>
#define F_CPU 1000000UL
#include <avr/delay.h>

int main (void) {
    volatile uint8_t i,j;
   
    /* set up the PWM on timer 0 (8-bit)*/
	TCCR0A=0xf3;
	TCCR0B=0x1;

    /* set up the PWM on timer 1 
     * which is 8-10 bits, but will use as
     * 8 bit.
     */

	TCCR1A=0xf1;
	TCCR1B=0x9;

     /* set up the PWM on timer 2 (8-bit) */
	TCCR2A=0xf3;
	TCCR2B=0x1;

    /* make sure the data direction registers are
     * set as output.
     */
	
    DDRD=0xff;
    DDRB=0xff;

    /* turn off unneccessary LEDs */
    PORTD=0;
    PORTB=0;

    /* loop infinitely */
    while(1){

	    /* change pulse widths on timer 1 */
	    for ( j =0 ;j <255 ;j=j+1){

		    /* delay a bit */
                    _delay_us(768.0); 
                    _delay_us(768.0); 
                    _delay_us(768.0); 

		    /* change the pulse widths */
		    OCR1A = j;
		    OCR1B = 255-j;
	     }

	    /* change pulse widths on timer 2 */
	     for ( j =0 ;j <255 ;j=j+1){
                    _delay_us(768.0); 
                    _delay_us(768.0); 
                    _delay_us(768.0); 
		    OCR2A = j;
		    OCR2B = 255-j;
	    }

	    /* change the pulse widths on timer 0 */
	    for ( j =0 ;j <255 ;j=j+1){
                    _delay_us(768.0); 
                    _delay_us(768.0); 
                    _delay_us(768.0); 
		    OCR0A = j;
		    OCR0B = 255-j;
	    }  
    }
}