blink.c

#include <avr/io.h>
#include <util/delay.h>
void ioInit(void);  //Initializes IO

int main (void) {
    ioInit(); //Setup IO pins and defaults

    while(1)
    {
//		PORTC = 0xFF;
		PORTB = 0xFF;
//		PORTD = 0xFF;
		_delay_ms(500);

//		PORTC = 0x00;
		PORTB = 0x00;
//		PORTD = 0x00;
		_delay_ms(500);
    }
   
    return(0);
}

void ioInit (void)
{
    //1 = output, 0 = input
    DDRB = 0b11111111; //All outputs
//    DDRC = 0b11111111; //All outputs
 //   DDRD = 0b11111111; //All outputs
}