quote:

#include <avr/io.h> // header file file for input output pins
#include <util/delay.h> // header file for delay.


int main (void)
{
/* set pin 5 of PORTB for output*/
DDRB |= _BV(DDB5);




while(1) {

/* set pin 5 high to turn led on */
PORTB |= _BV(PORTB5);
_delay_ms(1000); //delay 1 second

/* set pin 5 low to turn led off */
PORTB &= ~_BV(PORTB5);
_delay_ms(1000); //delay 1 second.
}
}