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38 lines
745 B
C++
38 lines
745 B
C++
#pragma once
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//
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// FILE: FastShiftIn.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.2.1
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// PURPOSE: Fast ShiftIn for 74HC165 register, AVR optimized
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// DATE: 2013-09-29
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// URL: https://github.com/RobTillaart/FastShiftIn
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//
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#include "Arduino.h"
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#define FASTSHIFTIN_LIB_VERSION (F("0.2.1"))
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class FastShiftIn
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{
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public:
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// bitorder = { LSBFIRST, MSBFIRST };
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FastShiftIn(const uint8_t datapin, const uint8_t clockpin, const uint8_t bitOrder = LSBFIRST);
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int read(void);
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// overrule bitorder (most optimized).
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int readLSBFIRST(void);
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int readMSBFIRST(void);
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private:
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uint8_t _bitorder;
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int _value;
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uint8_t _databit;
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volatile uint8_t *_datain;
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uint8_t _clockbit;
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volatile uint8_t *_clockin;
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};
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// -- END OF FILE --
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