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57 lines
1.1 KiB
C++
57 lines
1.1 KiB
C++
//
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// FILE: parprinter.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.00
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// PURPOSE: parallel printer class that implements the Print interface
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// DATE: 2013-09-30
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// URL:
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//
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// Released to the public domain
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//
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#include "ParPrinter.h"
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ParPrinter::ParPrinter()
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{
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// define pins
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for (uint8_t i = 0; i < 8; i++)
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{
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pin[i] = 2+i;
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}
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}
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void ParPrinter::begin()
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{
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pinMode(BUSY, INPUT);
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pinMode(STROBE, OUTPUT);
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for (uint8_t i = 0; i < 8; i++)
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{
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pinMode(pin[i], OUTPUT);
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}
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}
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// write() must implement the virtual write of the Print class
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size_t ParPrinter::write(uint8_t data)
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{
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while(digitalRead(BUSY) == HIGH);
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for (uint8_t i = 0; i < 8; i++)
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{
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digitalWrite(pin[i], bitRead(data, i) ); // direct port access will be faster
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}
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digitalWrite(STROBE, LOW);
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delay(2); // main time consuming part, so max 500chars/second = 10 lines.
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digitalWrite(STROBE, HIGH);
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while (digitalRead(BUSY) == HIGH);
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return 1;
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}
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/*
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derive CLass HP: ParPrinter
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{
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}
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*/
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// -- END OF FILE --
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