File content as of revision 2:5ce38ef7a7db:

#include "mbed.h"

// I2C addresses for LCD and RGB
#define LCD_ADDRESS     (0x7c)
#define RGB_ADDRESS     (0xc4)

#define RED_REG         0x04        
#define GREEN_REG       0x03        
#define BLUE_REG        0x02        

// commands
#define LCD_CLEARDISPLAY 0x01
#define LCD_DISPLAYCONTROL 0x08
#define LCD_FUNCTIONSET 0x20

// flags for display on/off control
#define LCD_DISPLAYON 0x04
#define LCD_DISPLAYOFF 0x00

// flag for entry mode
#define LCD_ENTRYLEFT 0x02

// flags for function set
#define LCD_8BITMODE 0x10
#define LCD_2LINE 0x08
#define LCD_5x10DOTS 0x04

/** Grove_LCD_RGB_Backlight Class.
*   Used for connecting a Grove LCD RGB Backlit display
*   to an mbed microcontroller via an I2C interface.
*/    
class Grove_LCD_RGB_Backlight
{
public:
    
    /** Contructor. Creates an instance of the Grove_LCD_RGB_Backlight class.
    *   @param sda SDA pin on the mbed microcontroller which will be used to communicate with the display.
    *   @param scl SCL pin on the mbed microcontroller which will be used to communicate with the display.
    */
    Grove_LCD_RGB_Backlight(PinName sda, PinName scl); 
    

    
    /** Set RGB color of backlight
    *   @param r Value for the red component of the RGB backlight (Between 0 and 255).
    *   @param g Value for the green component of the RGB backlight (Between 0 and 255).
    *   @param b Value for the blue component of the RGB backlight (Between 0 and 255).
    */
    void setRGB(char r, char g, char b);     
    
    
    /** Removes all of the text from the display.
    */
    void clear();
    
    /**Prints text to the LCD display.
    * @param *str Pointer to an array of characters which will be printed to the LCD screen.
    */
    void print(char *str);
    
    /**Move cursor to specified location on the LCD screen.
    * @param col Value for which column on the display the next text being printed will start at.
    * @param row Value for which row on the display the next text being printed will be printed on.
    */
    void locate(char col, char row);

    
private:
    
    //Initialize device
    void init();   
    
    //Turn on display
    void displayOn();
    
    //Send command to display
    void sendCommand(char value);
    
    //Set register value
    void setReg(char addr, char val);
    
    //MBED I2C object used to transfer data to LCD
    I2C i2c;              
    
};