72 lines
1.2 KiB
C++
72 lines
1.2 KiB
C++
//
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// FILE: PrinterSimulator.ino
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.0
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// PURPOSE: demo
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// DATE: 2020-06-24
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// (c) : MIT
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// Simple parallel printer simulator, prints to serial...
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// version could be made with a shiftin register ....
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#include "Arduino.h"
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uint8_t PIN_STROBE = 2;
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uint8_t PIN_BUSY = 13;
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uint8_t PIN_OOP = 10;
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uint8_t dataPins[] = { 3, 4, 5, 6, 7, 8, 9, 10 };
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void setup()
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{
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Serial.begin(115200);
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Serial.println(__FILE__);
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pinMode(PIN_STROBE, INPUT);
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pinMode(PIN_OOP, OUTPUT);
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pinMode(PIN_BUSY, OUTPUT); // build in LED UNO.
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for (uint8_t i = 0; i < 8; i++)
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{
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pinMode(dataPins[i], INPUT);
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}
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digitalWrite(PIN_OOP, HIGH); // HIGH is OK
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digitalWrite(PIN_BUSY, HIGH); // BUSY during startup
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delay(5000); // do startup thingies.
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}
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void loop()
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{
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handleInput();
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// do other things here
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}
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void handleInput()
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{
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uint8_t x = 0;
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digitalWrite(PIN_BUSY, LOW);
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while (digitalRead(PIN_STROBE) == HIGH) yield();
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for (int i = 0; i < 8; i++)
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{
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x <<= 1;
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if (digitalRead(dataPins[i]) == HIGH) x += 1;
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}
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while (digitalRead(PIN_STROBE) == LOW) yield();
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digitalWrite(PIN_BUSY, HIGH);
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// process data
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Serial.write(x);
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}
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// -- END OF FILE --
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