LiquidCrystal_I2C.h
#ifndef FDB_LIQUID_CRYSTAL_I2C_H
#define FDB_LIQUID_CRYSTAL_I2C_H
#include <inttypes.h>
#include <Print.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 0x08
#define LCD_NOBACKLIGHT 0x00
#define En B00000100 // Enable bit
// Add 4004 LCD
// Connect Pin 5 of LCD (R/W) to GND
// Connect Pin 5 of I2C interface to Enable 2 of LCD
//#define Rw B00000010 // Read/Write bit
#define En2 B00000010 // Enable 2 bit
#define Rs B00000001 // Register select bit
/**
* This is the driver for the Liquid Crystal LCD displays that use the I2C bus.
*
* After creating an instance of this class, first call begin() before anything else.
* The backlight is on by default, since that is the most likely operating mode in
* most cases.
*/
class LiquidCrystal_I2C : public Print {
public:
/**
* Constructor
*
* @param lcd_addr I2C slave address of the LCD display. Most likely printed on the
* LCD circuit board, or look in the supplied LCD documentation.
* @param lcd_cols Number of columns your LCD display has.
* @param lcd_rows Number of rows your LCD display has.
* @param charsize The size in dots that the display has, use LCD_5x10DOTS or LCD_5x8DOTS.
*/
LiquidCrystal_I2C(uint8_t lcd_addr, uint8_t lcd_cols, uint8_t lcd_rows, uint8_t charsize = LCD_5x8DOTS);
/**
* Set the LCD display in the correct begin state, must be called before anything else is done.
*/
void begin();
/**
* Remove all the characters currently shown. Next print/write operation will start
* from the first position on LCD display.
*/
void clear();
/**
* Next print/write operation will will start from the first position on the LCD display.
*/
void home();
/**
* Do not show any characters on the LCD display. Backlight state will remain unchanged.
* Also all characters written on the display will return, when the display in enabled again.
*/
void noDisplay();
/**
* Show the characters on the LCD display, this is the normal behaviour. This method should
* only be used after noDisplay() has been used.
*/
void display();
/**
* Do not blink the cursor indicator.
*/
void noBlink();
/**
* Start blinking the cursor indicator.
*/
void blink();
/**
* Do not show a cursor indicator.
*/
void noCursor();
/**
* Show a cursor indicator, cursor can blink on not blink. Use the
* methods blink() and noBlink() for changing cursor blink.
*/
void cursor();
void scrollDisplayLeft();
void scrollDisplayRight();
void printLeft();
void printRight();
void leftToRight();
void rightToLeft();
void shiftIncrement();
void shiftDecrement();
void noBacklight();
void backlight();
bool getBacklight();
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);
inline void blink_on() { blink(); }
inline void blink_off() { noBlink(); }
inline void cursor_on() { cursor(); }
inline void cursor_off() { noCursor(); }
// Compatibility API function aliases
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[]);
private:
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 _cols;
uint8_t _rows;
uint8_t _charsize;
uint8_t _backlightval;
// Add for 4004 LCD
bool _useTwoChips;
bool _useEnable2;
};
#endif // FDB_LIQUID_CRYSTAL_I2C_H