LiquidCrystal_I2C.h

// LiquidCrystal_I2C V2.0

#ifndef LiquidCrystal_I2C_h

#define LiquidCrystal_I2C_h

#include <inttypes.h>

#include "Print.h" 

#include <Wire.h>

// commands

#define LCD_CLEARDISPLAY 0x01

#define LCD_RETURNHOME 0x02

#define LCD_ENTRYMODESET 0x04

#define LCD_DISPLAYCONTROL 0x08

#define LCD_CURSORSHIFT 0x10

#define LCD_FUNCTIONSET 0x20

#define LCD_SETCGRAMADDR 0x40

#define LCD_SETDDRAMADDR 0x80

// flags for display entry mode

#define LCD_ENTRYRIGHT 0x00

#define LCD_ENTRYLEFT 0x02

#define LCD_ENTRYSHIFTINCREMENT 0x01

#define LCD_ENTRYSHIFTDECREMENT 0x00

// flags for display on/off control

#define LCD_DISPLAYON 0x04

#define LCD_DISPLAYOFF 0x00

#define LCD_CURSORON 0x02

#define LCD_CURSOROFF 0x00

#define LCD_BLINKON 0x01

#define LCD_BLINKOFF 0x00

// flags for display/cursor shift

#define LCD_DISPLAYMOVE 0x08

#define LCD_CURSORMOVE 0x00

#define LCD_MOVERIGHT 0x04

#define LCD_MOVELEFT 0x00

// flags for function set

#define LCD_8BITMODE 0x10

#define LCD_4BITMODE 0x00

#define LCD_2LINE 0x08

#define LCD_1LINE 0x00

#define LCD_5x10DOTS 0x04

#define LCD_5x8DOTS 0x00

// flags for backlight control

#define LCD_BACKLIGHT 0x00

#define LCD_NOBACKLIGHT 0x80

#define En B00010000  // Enable bit

#define Rw B00100000  // Read/Write bit

#define Rs B01000000  // Register select bit

class LiquidCrystal_I2C : public Print {

public:

  LiquidCrystal_I2C(uint8_t lcd_Addr,uint8_t lcd_cols,uint8_t lcd_rows);

  void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS );

  void clear();

  void home();

  void noDisplay();

  void display();

  void noBlink();

  void blink();

  void noCursor();

  void cursor();

  void scrollDisplayLeft();

  void scrollDisplayRight();

  void printLeft();

  void printRight();

  void leftToRight();

  void rightToLeft();

  void shiftIncrement();

  void shiftDecrement();

  void noBacklight();

  void backlight();

  void autoscroll();

  void noAutoscroll(); 

  void createChar(uint8_t, uint8_t[]);

  void setCursor(uint8_t, uint8_t); 

  virtual size_t write(uint8_t);

  void command(uint8_t);

  void init();

////compatibility API function aliases

void blink_on();            // alias for blink()

void blink_off();                 // alias for noBlink()

void cursor_on();                   // alias for cursor()

void cursor_off();                // alias for noCursor()

void setBacklight(uint8_t new_val);        // alias for backlight() and nobacklight()

void load_custom_character(uint8_t char_num, uint8_t *rows);  // alias for createChar()

void printstr(const char[]);

////Unsupported API functions (not implemented in this library)

uint8_t status();

void setContrast(uint8_t new_val);

uint8_t keypad();

void setDelay(int,int);

void on();

void off();

uint8_t init_bargraph(uint8_t graphtype);

void draw_horizontal_graph(uint8_t row, uint8_t column, uint8_t len,  uint8_t pixel_col_end);

void draw_vertical_graph(uint8_t row, uint8_t column, uint8_t len,  uint8_t pixel_col_end);

private:

  void init_priv();

  void send(uint8_t, uint8_t);

  void write4bits(uint8_t);

  void expanderWrite(uint8_t);

  void pulseEnable(uint8_t);

  uint8_t _Addr;

  uint8_t _displayfunction;

  uint8_t _displaycontrol;

  uint8_t _displaymode;

  uint8_t _numlines;

  uint8_t _cols;

  uint8_t _rows;

  uint8_t _backlightval;

};

#endif