Browse Source
hardware: http://www.elo-web.de/elo/entwicklung-und-projekte/ping-pong/retro-spiel-ping-pongfeature/2015
kju
15 years ago
4 changed files with 166 additions and 1 deletions
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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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#define PIN_DATA PB4 |
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#define PIN_CLK PB3 |
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#define PIN_STR PB2 |
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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 nächsten Zeile weiterschalten
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inline void nextrow(uint8_t row){ |
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//Die Zustände von der vorherigen Zeile löschen
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PORTC &= 0xF0; |
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PORTD &= 0x0F; |
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PORTB &= 0xFC; |
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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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PORTB &= ~(1<<PIN_DATA); // zeile ist aktiv auf low
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PORTB |= (1<<PIN_CLK); |
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PORTB &= ~(1<<PIN_CLK); |
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PORTB |= (1<<PIN_DATA); |
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} |
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else { |
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//In jeder anderen Zeile einfach nur einen weiter schieben
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PORTB |= (1<<PIN_CLK); |
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PORTB &= ~(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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TCNT0 = 0x100-12; |
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break; |
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case 1: |
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TCNT0 = 0x100-20; |
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break; |
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case 2: |
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TCNT0 = 0x100-50; |
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} |
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uint8_t tmp, tmp1; |
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//die Daten für die aktuelle Zeile auf die Spaltentreiber ausgeben
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tmp = pixmap[plane][row][0]; |
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tmp1 = pixmap[plane][row][1]; |
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PORTC = ( PORTC & 0xF0 ) | (tmp & 0x0F); |
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PORTD = ( PORTD & 0x0F ) | (tmp & 0xF0); |
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PORTB = ( PORTB & 0xFC ) | (tmp1 & 0x03); |
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} |
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//Dieser Interrupt wird je nach Ebene mit 50kHz 31,25kHz oder 12,5kHz ausgeführt
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SIGNAL(SIG_OVERFLOW0) |
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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 zurücksetzen
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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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/*
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COLPORT1 = 0; |
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COLPORT2 = 0; |
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ROWPORT = 0; |
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*/ |
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TCCR0 = 0x00; |
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sei(); |
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} |
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// Den Timer, der denn Interrupt auslöst, 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 = 0x03; // clk/64
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TCNT0 = 0xFF-20; // reset timer
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TIMSK |= (1<<TOIE0); // Compare match Interrupt on
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} |
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void borg_hw_init(){ |
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// Nötige Pins auf Ausgang
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DDRC=0x0F; // PC0-3 - Row 0-3
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DDRD=0xF0; // PCD-7 - Row 4-7
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DDRB=0x1F; // PB0-1 - Row 8-9 PB2-3 - STR, CLK, d
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// Alle Spalten erstmal aus, clk aus, d und str an
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PORTC &= 0xF0; |
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PORTD &= 0x0F; |
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PORTB = ( PORTB & 0xE0 ) | 0x14; |
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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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} |
@ -0,0 +1,4 @@ |
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mainmenu_option next_comment |
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comment "PingPong port setup (missing for now)" |
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endmenu |
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