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#include "../config.h"
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#include "../makros.h"
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#include <avr/interrupt.h>
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#include <avr/io.h>
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#include <avr/wdt.h>
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#include "borg_hw.h"
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/*
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// Diese #defines werden nun durch menuconfig gesetzt
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// 16 Spalten insgesamt direkt gesteuert, daf�r 2 Ports
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#define COLPORT1 PORTC
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#define COLDDR1 DDRC
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#define COLPORT2 PORTA
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#define COLDDR2 DDRA
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// Der andere Port �bernimmt die Steuerung der Schieberegister
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#define ROWPORT PORTD
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#define ROWDDR DDRD
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// Clock und reset gehen gemeinsam an beide Schieberegister
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// der reset pin ist negiert
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#define PIN_MCLR PD4
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#define PIN_CLK PD6
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//das dier sind die individuellen Dateneing�nge f�r die Schieberegister
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#define PIN_DATA PD7
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*/
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#define COLDDR1 DDR(COLPORT1)
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#define COLDDR2 DDR(COLPORT2)
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#define ROWDDR DDR(ROWPORT)
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#ifdef __AVR_ATmega644P__
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/* more ifdef magic :-( */
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#define OCR0 OCR0A
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#define SIG_OUTPUT_COMPARE0 SIG_OUTPUT_COMPARE0A
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#endif
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//Der Puffer, in dem das aktuelle Bild gespeichert wird
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unsigned char pixmap[NUMPLANE][NUM_ROWS][LINEBYTES];
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//zur n�chsten Zeile weiterschalten
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inline void nextrow(uint8_t row){
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//Die Zust�nde von der vorherigen Zeile l�schen
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COLPORT1 = 0;
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COLPORT2 = 0;
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//kurze Warteschleife, damit die Treiber auch wirklich ausschalten
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unsigned char i;
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for(i=0;i<10;i++){
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asm volatile("nop");
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}
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if (row == 0){
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//Zeile 0: Das erste Schieberegister initialisieren
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#ifndef INVERT_ROWS
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ROWPORT&= ~(1<<PIN_MCLR);
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ROWPORT|= (1<<PIN_MCLR);
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ROWPORT|= (1<<PIN_DATA);
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ROWPORT|= (1<<PIN_CLK);
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ROWPORT&= ~(1<<PIN_CLK);
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ROWPORT&= ~(1<<PIN_DATA);
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#else
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ROWPORT&= ~(1<<PIN_DATA);
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ROWPORT|= (1<<PIN_CLK);
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ROWPORT&= ~(1<<PIN_CLK);
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ROWPORT|= (1<<PIN_DATA);
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#endif
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}else{
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//In jeder anderen Zeile einfach nur einen weiter schieben
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ROWPORT|= (1<<PIN_CLK);
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ROWPORT&= ~(1<<PIN_CLK);
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}
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//noch eine Warteschleife, damit die Zeilentreiber bereit sind
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for(i=0;i<20;i++){
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asm volatile("nop");
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}
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}
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//Eine Zeile anzeigen
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inline void rowshow(unsigned char row, unsigned char plane){
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//Je nachdem, welche der Ebenen wir Zeichnen, die Zeile verschieden lange Anzeigen
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switch (plane){
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case 0:
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OCR0 = 3;
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break;
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case 1:
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OCR0 = 4;
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break;
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case 2:
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OCR0 = 22;
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}
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uint8_t tmp, tmp1;
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//die Daten f�r die aktuelle Zeile auf die Spaltentreiber ausgeben
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#ifndef INTERLACED_ROWS
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tmp = pixmap[plane][row][0];
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tmp1 = pixmap[plane][row][1];
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#else
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row = (row>>1) + ((row & 0x01)?8:0 );
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tmp = pixmap[plane][row][0];
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tmp1 = pixmap[plane][row][1];
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#endif
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#ifdef REVERSE_COLS
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tmp = (tmp >> 4) | (tmp << 4);
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tmp = ((tmp & 0xcc) >> 2) | ((tmp & 0x33)<< 2); //0xcc = 11001100, 0x33 = 00110011
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tmp = ((tmp & 0xaa) >> 1) | ((tmp & 0x55)<< 1); //0xaa = 10101010, 0x55 = 1010101
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COLPORT2 = tmp;
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tmp = tmp1;
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tmp = (tmp >> 4) | (tmp << 4);
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tmp = ((tmp & 0xcc) >> 2) | ((tmp & 0x33) << 2); //0xcc = 11001100, 0x33 = 00110011
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tmp = ((tmp & 0xaa) >> 1) | ((tmp & 0x55) << 1); //0xaa = 10101010, 0x55 = 1010101
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COLPORT1 = tmp;
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#else
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#ifdef INTERLACED_COLS
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static uint8_t interlace_table[16] = {
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0x00, 0x01, 0x04, 0x05, 0x10, 0x11, 0x14, 0x15, 0x40, 0x41, 0x44, 0x45, 0x50, 0x51, 0x54, 0x55
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};
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COLPORT1 = interlace_table[tmp&0x0f] | (interlace_table[tmp1&0x0f]<<1);
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tmp>>=4; tmp1>>=4;
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COLPORT2 = interlace_table[tmp] | (interlace_table[tmp1]<<1);
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#else
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COLPORT1 = tmp;
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COLPORT2 = tmp1;
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#endif
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#endif
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}
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//Dieser Interrupt wird je nach Ebene mit 50kHz 31,25kHz oder 12,5kHz ausgef�hrt
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SIGNAL(SIG_OUTPUT_COMPARE0)
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{
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static unsigned char plane = 0;
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static unsigned char row = 0;
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//Watchdog zur�cksetzen
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wdt_reset();
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//Zeile und Ebene inkrementieren
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if(++plane==NUMPLANE){
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plane=0;
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if(++row == NUM_ROWS){
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row = 0;
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}
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nextrow(row);
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}
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//Die aktuelle Zeile in der aktuellen Ebene ausgeben
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rowshow(row, plane);
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}
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void timer0_off(){
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cli();
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COLPORT1 = 0;
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COLPORT2 = 0;
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ROWPORT = 0;
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#ifdef __AVR_ATmega644P__
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TCCR0A = 0x00;
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TCCR0B = 0x00;
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#else
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TCCR0 = 0x00;
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#endif
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sei();
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}
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// Den Timer, der denn Interrupt ausl�st, initialisieren
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void timer0_on(){
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/* TCCR0: FOC0 WGM00 COM01 COM00 WGM01 CS02 CS01 CS00
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CS02 CS01 CS00
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0 0 0 stop
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0 0 1 clk
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0 1 0 clk/8
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0 1 1 clk/64
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1 0 0 clk/256
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1 0 1 clk/1024
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*/
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#ifdef __AVR_ATmega644P__
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TCCR0A = 0x02; // CTC Mode
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TCCR0B = 0x04; // clk/256
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TCNT0 = 0; // reset timer
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OCR0 = 20; // Compare with this value
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TIMSK0 = 0x02; // Compare match Interrupt on
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#else
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TCCR0 = 0x0C; // CTC Mode, clk/256
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TCNT0 = 0; // reset timer
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OCR0 = 20; // Compare with this value
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TIMSK = 0x02; // Compare match Interrupt on
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#endif
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}
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void borg_hw_init(){
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//Spalten Ports auf Ausgang
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COLDDR1 = 0xFF;
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COLDDR2 = 0xFF;
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//Pins am Zeilenport auf Ausgang
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ROWDDR = (1<<PIN_MCLR) | (1<<PIN_CLK) | (1<< PIN_DATA);
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//Alle Spalten erstmal aus
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COLPORT1 = 0;
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COLPORT2 = 0;
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//Schieberegister f�r Zeilen zur�cksetzen
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ROWPORT = 0;
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timer0_on();
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//Watchdog Timer aktivieren
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wdt_reset();
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wdt_enable(0x00); // 17ms Watchdog
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}
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