#ifndef _LCD_I2C_H_
#define _LCD_I2C_H_

#include "stm32f4xx.h"  
#include "stm32f4xx_gpio.h"            
#include "i2c.h"
#include "reference.h"
// LCD 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 and cursor 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 COMMAND and DATA LCD Rs (used by send method).
// ---------------------------------------------------------------------------
#define COMMAND                 0
#define DATA                    1
#define FOUR_BITS               2

/*!
 @defined 
 @abstract   Defines the duration of the home and clear commands
 @discussion This constant defines the time it takes for the home and clear
 commands in the LCD - Time in microseconds.
 */
#define HOME_CLEAR_EXEC      2000

/*!
    @defined 
    @abstract   Backlight off constant declaration
    @discussion Used in combination with the setBacklight to swith off the
 LCD backlight. @set setBacklight
*/
#define BACKLIGHT_OFF           0

/*!
 @defined 
 @abstract   Backlight on constant declaration
 @discussion Used in combination with the setBacklight to swith on the
 LCD backlight. @set setBacklight
 */
#define BACKLIGHT_ON          255

/*!
 @typedef 
 @abstract   Define backlight control polarity
 @discussion Backlight control polarity. @see setBacklightPin.
 */
typedef enum { POSITIVE, NEGATIVE } t_backlighPol;

//void lcd_i2c_config ( uint8_t lcd_Addr, uint8_t En, uint8_t Rw, uint8_t Rs, uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7 );
void lcd_i2c_config ( uint8_t lcd_Addr );
void lcd_i2c_init ( uint8_t cols, uint8_t lines, uint8_t dotsize );
void lcd_i2c_begin ( uint8_t cols, uint8_t lines, uint8_t dotsize );
void lcd_i2c_setBacklightPin ( uint8_t value, t_backlighPol pol );
void lcd_i2c_setBacklight ( uint8_t value );
void lcd_i2c_send ( uint8_t value, uint8_t mode );
void lcd_i2c_write4bits(uint8_t value, uint8_t mode);
void lcd_i2c_pulseEnable(uint8_t);
void lcd_i2c_display(void);
void lcd_i2c_noDisplay(void);
void lcd_i2c_clear(void);
void lcd_i2c_backlight(void);
void lcd_i2c_noBacklight(void);
void lcd_i2c_print(char data[], uint8_t size);
void lcd_i2c_setCursor(uint8_t col, uint8_t row);
void lcd_i2c_createChar(uint8_t location, uint8_t charmap[]);

#endif