Cooler`s AVR blink

/*
codando com gcc-avr
pisca pisca simples no pino 5

by Cooler_
c00f3r[at]gmail[dot]com

tudo isso para fazer led piscar :-/

*/

#include <avr/io.h>
#include <util/delay.h>
#define LEDPIN 5

void
pausa(unsigned int ms)
{
  unsigned int x,y;
  for(y=0; y<1000; y++)
    for(x=0; x<ms; x++);
}

int
main (void)
{

 // para usar pino 5
 DDRD|=1<<LEDPIN;

 do{
  // OFF
  PORTD&=~(1<<LEDPIN);
  pausa(500);

  // ON
  PORTD|=1<<LEDPIN;
  pausa(500);
 }while(1);

  return 0;
}