; Arduino sketch .S subroutine written in AVR assembly code

#include "avr/io.h"

.global led13on
.global led13off
.global set13out

set13out:
  sbi DDRB-0x20,5
  ret

led13on:
  sbi PORTB-0x20,5
  ret

led13off:
  cbi PORTB-0x20,5
  ret