TM1637.h

#pragma once
//
//    FILE: TM1637.h
//  AUTHOR: Rob Tillaart
//    DATE: 2019-10-28
// VERSION: 0.3.3
// PUPROSE: TM1637 library for Arduino
//     URL: https://github.com/RobTillaart/TM1637_RT


// tested on 6 digit display + 4 digit (clock) display


#include "Arduino.h"

#define TM1637_LIB_VERSION      (F("0.3.3"))


class TM1637
{
public:
  TM1637();

  //  replaces init()
  void begin(uint8_t clockPin, uint8_t dataPin, uint8_t digits = 6);

  void displayRaw(uint8_t * data, uint8_t pointPos);
  void displayInt(long value);
  void displayFloat(float value);
  void displayHex(uint32_t value);
  void displayClear();

  void    setBrightness(uint8_t b);
  uint8_t getBrightness() { return _brightness; };

  //  tune the timing of writing bytes.
  void    setBitDelay(uint8_t bitDelay = 10) { _bitDelay = bitDelay; };
  uint8_t getBitDelay() { return _bitDelay; };
  uint8_t keyscan(void);

  //  the order the individual digits must be sent to the display.
  void    setDigitOrder(uint8_t a = 0, uint8_t b = 1,
                        uint8_t c = 2, uint8_t d = 3,
                        uint8_t e = 4, uint8_t f = 5,
                        uint8_t g = 6, uint8_t h = 7);

  //  OBSOLETE
  //  init will be replaced by begin() in the future (0.4.0)
  void init(uint8_t clockPin, uint8_t dataPin, uint8_t digits = 6);


private:
  uint8_t _clock      = -1;
  uint8_t _data       = -1;
  uint8_t _digits     = 4;
  uint8_t _brightness = 3;
  uint8_t _bitDelay   = 10;

  uint8_t _digitOrder[8];

  uint8_t writeByte(uint8_t data);
  void    start();
  void    stop();

  void writeSync(uint8_t pin, uint8_t val);
  void nanoDelay(uint16_t n);
};


// -- END OF FILE --