221 lines
4.1 KiB
C
221 lines
4.1 KiB
C
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#include"../autoconf.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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/* Steckerbelegung Flachbandkabel am Panel
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* (die Nummerierung ist in wirklichkeit umgekehrt)
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*
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* 1-3 GND
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* 4 +5V f<EFBFBD>r Logic
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* 5-8 +12V
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* 9-10 GND
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* 11 CP3
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* 12 CP2
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* 13 CP1
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* 14 /show
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* 15 CP4
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* 16 /EO3
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* 17-18 GND
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* 19-26 D0-D7
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*
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* Und nochmal richtigrum:
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* 1 D7
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* 2 D6
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* 3 D5
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* 4 D4
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* 5 D3
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* 6 D2
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* 7 D1
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* 8 D0
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* 9 GND
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* 10 GND
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* 11 /EO3
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* 12 CP4
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* 13 /show
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* 14 CP1
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* 15 CP2
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* 16 CP3
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* 17 GND
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* 18 GND
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* 19 +12V
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* 20 +12V
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* 21 +12V
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* 22 +12V
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* 23 +5V
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* 24 GND
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* 25 GND
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* 26 GND
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*
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* Es werden 4 40374 Latches benutzt. Nr. 1,2 und 4 treiben vom Datenbus
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* in Richtung Panel, Nr. 3 treibt von den Tastenausg<EFBFBD>ngen auf den Datenbus.
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* Die EOs von 1,2 und 4 liegen fest auf GND.
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*
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* Die LEDs sind in einer 12*16 Matrix angeordnet
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* Die Werte f<EFBFBD>r die LED spalten Werden mit CP1 und CP2 in die
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* Latches <EFBFBD>bernommen (insgesammt 16 Spalten)
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* Die Nummer der Zeile wird beim l<EFBFBD>schen von /show <EFBFBD>bernommen.
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*
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* Die Tasten sind in einer 8*8 Matrix angeordnet.
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* <EFBFBD>ber Latch 4 werden die Zeilen einzeln auf high gesetzt, <EFBFBD>ber
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* Latch 3 k<EFBFBD>nnen dann die Spalten gelesen werden.
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*
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*/
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//Datenport f<>r das Panel
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#define COLPORT PORTC
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#define COLDDR DDRC
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#define COLPIN PINC
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#define CTRLPORT PORTD
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#define CTRLDDR DDRD
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// PINs on CTRLPORT
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#define PIN_EO3 PD7
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#define PIN_CP4 PD2
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#define PIN_SHOW PD3
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#define PIN_CP1 PD4
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#define PIN_CP2 PD5
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#define PIN_CP3 PD6
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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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volatile uint8_t keys[8];
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inline void busywait() {
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//unsigned char i;
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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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CTRLPORT |= (1<<PIN_SHOW);//blank
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COLPORT = pixmap[plane][row][0];
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busywait();
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CTRLPORT |= (1<<PIN_CP1);
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busywait();
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CTRLPORT &= ~(1<<PIN_CP1);
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busywait();
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COLPORT = pixmap[plane][row][1];
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busywait();
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CTRLPORT |= (1<<PIN_CP2);
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busywait();
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CTRLPORT &= ~(1<<PIN_CP2);
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busywait();
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COLPORT = row;
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busywait();
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CTRLPORT &= ~(1<<PIN_SHOW);
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}
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inline void checkkeys(uint8_t row){
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static uint8_t mask;
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if(row == 0){
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mask = 1;
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}else{
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//read keyboard cols into latch
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COLDDR = 0;
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CTRLPORT &= ~(1<<PIN_EO3);
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CTRLPORT |= (1<<PIN_CP3);
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busywait();
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CTRLPORT &= ~(1<<PIN_CP3);
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busywait();
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keys[row-1] = COLPIN;
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CTRLPORT |= (1<<PIN_EO3);
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busywait();
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COLDDR = 0xFF;
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}
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COLPORT = mask;
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mask <<= 1;
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busywait();
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CTRLPORT |= (1<<PIN_CP4);
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busywait();
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CTRLPORT &= ~(1<<PIN_CP4);
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}
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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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static unsigned char plane = 0;
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static unsigned char row = 0;
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//Watchdog zur<75>cksetzen
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wdt_reset();
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//Die aktuelle Zeile in der aktuellen Ebene ausgeben
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rowshow(row, plane);
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if( (plane == 2) && (row<9) ) checkkeys(row);
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//Zeile und Ebene inkrementieren
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if(++row == NUM_ROWS){
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row = 0;
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if(++plane==NUMPLANE) plane=0;
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switch(plane){
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case 0:
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OCR0 = 5;
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break;
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case 1:
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OCR0 = 12;
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break;
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case 2:
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OCR0 = 20;
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break;
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}
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}
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}
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void timer0_off(){
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cli();
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TCCR0 = 0x00;
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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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TCCR0 = 0x0C; // CTC Mode, clk/64
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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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}
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void borg_hw_init(){
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//Pins am Zeilenport auf Ausgang
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CTRLPORT |= (1<<PIN_EO3)|(1<<PIN_SHOW);
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CTRLDDR |= (1<<PIN_EO3) | (1<<PIN_CP4) | (1<<PIN_SHOW) | (1<<PIN_CP1) | (1<<PIN_CP2) | (1<<PIN_CP3);
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//Alle Spalten erstmal aus
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//Spalten Ports auf Ausgang
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COLDDR = 0xFF;
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COLPORT = 0x00;
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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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