87 lines
1.7 KiB
C++
87 lines
1.7 KiB
C++
// yellow
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#define CLOCK_PIN 6
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// orange
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#define DATA_PIN 7
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// green
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#define READ_PIN 5
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uint8_t shiftInFixed(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder) {
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digitalWrite(clockPin, LOW);
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uint8_t value = 0;
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uint8_t i;
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for (i = 0; i < 8; ++i) {
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if (bitOrder == LSBFIRST)
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value |= digitalRead(dataPin) << i;
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else
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value |= digitalRead(dataPin) << (7 - i);
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digitalWrite(clockPin, HIGH);
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delayMicroseconds(3);
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digitalWrite(clockPin, LOW);
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}
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return value;
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}
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void printBits(byte myByte){
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for(byte mask = 0x80; mask; mask >>= 1){
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if(mask & myByte)
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Serial.print('1');
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else
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Serial.print('0');
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}
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}
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void setup()
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{
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pinMode(CLOCK_PIN, OUTPUT);
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pinMode(DATA_PIN, INPUT);
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pinMode(READ_PIN, OUTPUT);
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// Open serial communications and wait for port to open:
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Serial.begin(115200);
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while (!Serial) {
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; // wait for serial port to connect. Needed for Native USB only
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}
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Serial.println("Goodnight moon!");
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}
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void loop() // run over and over
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{
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// read data in
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digitalWrite(READ_PIN, HIGH);
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delayMicroseconds(3);
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digitalWrite(READ_PIN, LOW);
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// shift data bit by bit
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uint8_t data[4];
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for (int i = 0; i < 4; i++) {
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data[i] = shiftInFixed(DATA_PIN, CLOCK_PIN, LSBFIRST);
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}
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digitalWrite(CLOCK_PIN, LOW);
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// First byte is select button:
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// 00000001 STOP
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// 00000010 1S
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// 00000100 10S
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// ...
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// 10000000 REAL OUT
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// 00000000 NORM OUT
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// second, third and fourth byte are rotating digits
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// every dial is a nibble, but the nibbles switched place
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// so 0010 1001 (2 9) is in real life 92
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printBits(data[0]);
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for (int i = 1; i < 4; i++) {
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Serial.print(" ");
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Serial.print(data[i] & 0b1111, DEC);
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Serial.print(data[i] >> 4, DEC);
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}
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Serial.println("");
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delay(500);
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}
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