; **************************************************************
; * R/2R-Network produces a sawtooth signal on Port D          *
; * (C)2005 by info@avr-asm-tutorial.net                       *
; **************************************************************
;
.INCLUDE "8515def.inc"
;
; Register definitions
;
.DEF rmp = R16 ; Multipurpose register
;
	ldi rmp,0xFF;  Set all pins of Port D as output
	out DDRD,rmp
sawtooth:
	out PORTD,rmp
	inc rmp
	rjmp sawtooth