.include "4433def.inc"		; Definitionen für den Atmel AT90S4433

.def temp1 = r16

.org $000
.cseg
	rjmp	reset		; Reset Handler
	reti			; IRQ0 Handler
	reti			; IRQ1 Handler
	reti			; Timer1 Capture Handler
	reti			; Timer1 compare Handler
	reti			; Timer1 Overflow Handler
	reti			; Timer0 Overflow Handler
	reti			; SPI Transfer Complete Handler
	reti			; UART RX Complete Handler
	reti			; UDR Empty Handler
	reti			; UART TX Complete Handler
	reti			; ADC Conversion Complete Interrupt Handler
	reti			; EEPROM Ready Handler
	reti			; Analog Comparator Handler

reset:
	ldi	temp1,RAMEND	;LOW-Byte der obersten RAM-Adresse
	out	SPL,temp1

	ldi	temp1, 0xFF	; PortD komplett als Ausgang
	out	DDRD, temp1
	
	ldi	temp1,0x00	; kein Pin aktivieren
	out	PortD,temp1

	rjmp	MainLoop	;ab ins Programm!!!
reti

Wait:
; ============================= 
;   Warteschleifen-Generator 
;     59 Zyklen:
; ----------------------------- 
; warte 57 Zyklen:
          ldi  R29, $13
WGLOOP0:  dec  R29
          brne WGLOOP0
; ----------------------------- 
; warte 2 Zyklen:
          nop
          nop
; ============================= 
ret

MainLoop:
	ldi		temp1,0xFF
	out		PortD,temp1

	rcall	Wait

	ldi		temp1,0x00
	out		PortD,temp1

	rcall	Wait

	rjmp	MainLoop	;Endlosschleife