#pragma once
//
//    FILE: FastShiftOut.h
//  AUTHOR: Rob Tillaart
// VERSION: 0.4.0
// PURPOSE: shiftOut class that implements the Print interface
//    DATE: 2013-08-22
//     URL: https://github.com/RobTillaart/FastShiftOut


#include "Arduino.h"
#include "Print.h"

#define FASTSHIFTOUT_LIB_VERSION        (F("0.4.0"))

//  uncomment next line to get SPEED OPTIMIZED CODE
#define FASTSHIFTOUT_AVR_LOOP_UNROLLED    1


class FastShiftOut : public Print
{
public:
  // bitOrder = { LSBFIRST, MSBFIRST };
  FastShiftOut(uint8_t dataOut, uint8_t clockPin, uint8_t bitOrder = LSBFIRST);

  size_t  write(uint8_t data);
  uint8_t lastWritten(void);

  //  EXPERIMENTAL (wrappers)
  size_t  write16(uint16_t data);
  size_t  write24(uint32_t data);
  size_t  write32(uint32_t data);
  size_t  write(uint8_t * array, size_t size);

  //  META
  bool    setBitOrder(uint8_t bitOrder);
  uint8_t getBitOrder(void);

  //  overrule bitOrder, most optimized.
  size_t  writeLSBFIRST(uint8_t data);
  size_t  writeMSBFIRST(uint8_t data);

private:
  uint8_t _bitOrder;
  uint8_t _lastValue;


#if defined(ARDUINO_ARCH_AVR) || defined(ARDUINO_ARCH_MEGAAVR)

  volatile uint8_t *_dataOutRegister;
  uint8_t _dataOutBit;

  volatile uint8_t *_clockRegister;
  uint8_t _clockBit;

#else

  uint8_t _dataPinOut;
  uint8_t _clockPin;

#endif
};


//  -- END OF FILE --