55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
/*
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* This file is part of Pat80 Utils.
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*
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* Pat80 Utils is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Pat80 Utils is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY * without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Pat80 Utils. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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* HD44780 Character display debugger
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* Used to intercept data sent from Pat80 to character display
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*/
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#define EN 2
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const byte DATA_BUS[] = {10, 9, 8, 7, 6, 5, 4, 3};
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void setup() {
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pinMode(EN, INPUT_PULLUP);
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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(EN), 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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