#include <avr/io.h>

void main(void)
{
	DDRA = 0xFF;
	PORTA = 0x00;

	DDRB = 0xFF;
	PORTB = 0xAA;

	DDRC = 0xFF;
	PORTC = 0x55;

	for(;;)
	{
	//	PORTA ^= 1; // blink bit 0 in portA
		PORTA = 0x55;
		PORTA = 0xAA;

	}

}