111 lines
1.9 KiB
C++
111 lines
1.9 KiB
C++
#include <Arduino.h>
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/*
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for cheap Chinese 64 dots LED-Projector
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Board has unmarked chip in socket - pin layout fits to ATTiny 2313 an 4313
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the LEDS are connected to 8 pcs 74HC595
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--u--
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RST 1 20 VCC
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NC (0) 2 19 (16) IN SCK
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NC (1) 3 18 (15) IN MISO
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XTAL 4 17 (14) IN MOSI
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XTAL 5 16 (13) IN
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OUT (4) 6 15 (12) IN
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OUT (5) 7 14 (11) IN
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OUT (6) 8 13 (10) IN
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NC (7) 9 12 (9) MIC
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GND 10 11 (8) IN
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-----
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() = Arduino Pins
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RST = Reset - 10K to GND, 10uF to VCC
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XTAL = 16 MHz Crystal
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IN = switches
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MIC = Input from microphone amplifier (LM358)
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*/
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#define LATCHPIN 5
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#define DATAPIN 4
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#define CLOCKPIN 6
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byte ledsData[8];
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byte currentled = 0;
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void clear() {
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for (int i=0; i < 8; i++) {
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// low is led on
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ledsData[i] = 255;
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}
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}
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void writebuffer(byte ledNr) {
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byte chipNr = ledNr / 8;
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byte pinNr = ledNr % 8;
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if(chipNr < 8) {
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bitWrite(ledsData[chipNr], pinNr, LOW);
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}
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}
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void writexy(byte x, byte y) {
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byte lednr = x*8 + y;
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writebuffer(lednr);
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}
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byte rowmask[8] = {5,3,1,0,2,4,6,7};
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void pushout() {
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digitalWrite(LATCHPIN, LOW);
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for(int i = 8-1; i>=0; i--) {
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byte row = rowmask[i];
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shiftOut(DATAPIN, CLOCKPIN, MSBFIRST, ledsData[row]);
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}
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digitalWrite(LATCHPIN, HIGH);
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}
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void setup() {
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pinMode(LATCHPIN, OUTPUT);
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pinMode(DATAPIN, OUTPUT);
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pinMode(CLOCKPIN, OUTPUT);
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clear();
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pushout();
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}
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byte currentcol=1;
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bool direction = true;
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void loop() {
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clear();
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// x-line
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for(byte i=0; i<8; i++) {
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writexy(i,currentcol-1);
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}
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// y line
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for(byte i=0; i<8; i++) {
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writexy(currentcol-1,i);
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}
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pushout();
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if(direction) {
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currentcol++;
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} else {
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currentcol--;
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}
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if (currentcol >8) {
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currentcol = 7;
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direction = false;
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}
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if (currentcol <=0) {
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currentcol=2;
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direction = true;
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}
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delay(100);
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}
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