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https://github.com/RobTillaart/Arduino.git
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63 lines
1.2 KiB
C++
63 lines
1.2 KiB
C++
#pragma once
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//
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// FILE: FastShiftInOut.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.3
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// PURPOSE: Arduino library for (AVR) optimized shiftInOut (simultaneously)
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// URL: https://github.com/RobTillaart/FastShiftInOut
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#include "Arduino.h"
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#define FASTSHIFTINOUT_LIB_VERSION (F("0.1.3"))
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class FastShiftInOut
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{
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public:
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// bitOrder = { LSBFIRST, MSBFIRST };
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FastShiftInOut(uint8_t dataIn, uint8_t dataOut, uint8_t clockPin, uint8_t bitOrder = LSBFIRST);
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// reads and writes simultaneously
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uint8_t write(uint8_t data);
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uint8_t lastWritten(void);
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uint8_t lastRead(void);
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bool setBitOrder(uint8_t bitOrder);
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uint8_t getBitOrder(void);
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// overrule bitOrder (most optimized).
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uint8_t writeLSBFIRST(uint8_t data);
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uint8_t writeMSBFIRST(uint8_t data);
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private:
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uint8_t _bitOrder;
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int _lastValue;
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int _lastRead;
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#if defined(ARDUINO_ARCH_AVR) || defined(ARDUINO_ARCH_MEGAAVR)
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volatile uint8_t *_dataInRegister;
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uint8_t _dataInBit;
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volatile uint8_t *_dataOutRegister;
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uint8_t _dataOutBit;
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volatile uint8_t *_clockRegister;
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uint8_t _clockBit;
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#else
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uint8_t _dataPinIn;
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uint8_t _dataPinOut;
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uint8_t _clockPin;
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#endif
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};
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// -- END OF FILE --
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