36 lines
837 B
C++
36 lines
837 B
C++
/* HD44780 Character display debugger */
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#define EN 11
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const byte DATA_BUS[] = {3, 4, 5, 6, 7, 8, 9, 10};
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void setup() {
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pinMode(EN, INPUT);
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for(int pin=0; pin < 8; pin++) {
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pinMode(DATA_BUS[pin], INPUT);
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}
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Serial.begin(57600);
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Serial.println("HD44780 debugger");
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Serial.println("DATA BUS HEX EN");
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attachInterrupt(digitalPinToInterrupt(2), onClk, FALLING);
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}
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void loop() {}
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void onClk() {
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unsigned int data = 0;
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for(int pin=0; pin < 8; pin++) {
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byte b = digitalRead(DATA_BUS[pin]) ? 1 : 0;
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Serial.print(b);
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data = (data << 1) + b; // Shifta di 1 e aggiunge il bit corrente. Serve per ricostruire il numero da binario
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}
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char output[50] = {};
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sprintf(output, " 0x%02x %c",
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data,
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digitalRead(EN) ? 'D' : 'I'
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);
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Serial.println(output);
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}
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