132 lines
2.7 KiB
C
132 lines
2.7 KiB
C
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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<61>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 <20>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<6E>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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//Dieser Interrupt wird je nach Ebene mit 50kHz 31,25kHz oder 12,5kHz ausgef<65>hrt
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SIGNAL(SIG_OUTPUT_COMPARE0)
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{
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//Watchdog zur<75>cksetzen
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wdt_reset();
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COLPORT1 = (pixmap[0][0][0] & 0x0f) | (pixmap[0][1][0] << 4);
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COLPORT2 = (pixmap[0][2][0] & 0x0f) | (pixmap[0][3][0] << 4);
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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<73>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<75>cksetzen
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ROWPORT = 0;
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//Alle Zeilen ausg<73>nge an bei gigaborg
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ROWPORT |= (1<<PIN_DATA) | (1<<PIN_MCLR);
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uint8_t x;
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for(x=0;x<16;x++){
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ROWPORT|= (1<<PIN_CLK);
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ROWPORT&= ~(1<<PIN_CLK);
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}
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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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