#pragma once
//
//    FILE: FastShiftIn.h
//  AUTHOR: Rob Tillaart
// VERSION: 0.2.3
// PURPOSE: Fast ShiftIn for 74HC165 register, AVR optimized
//    DATE: 2013-09-29
//     URL: https://github.com/RobTillaart/FastShiftIn


#include "Arduino.h"


#define FASTSHIFTIN_LIB_VERSION         (F("0.2.3"))


class FastShiftIn
{
public:
  // bitOrder = { LSBFIRST, MSBFIRST };
  FastShiftIn(const uint8_t datapin, const uint8_t clockpin, const uint8_t bitOrder = LSBFIRST);

  int     read(void);
  int     lastRead(void)    { return _value; };

  bool    setBitOrder(const uint8_t bitOrder);
  uint8_t getBitOrder(void) { return _bitorder; };

  // overrule bitOrder (most optimized).
  int     readLSBFIRST(void);
  int     readMSBFIRST(void);

private:
  uint8_t _bitorder;
  int     _value;

  uint8_t _databit;
  volatile uint8_t *_datain;

  uint8_t _clockbit;
  volatile uint8_t *_clockin;
};


// -- END OF FILE --