PIC16F-12-I2C-LCD-Initialization&Configuration

/* File: main.c
 * Author: Marwen Maghrebi
 * Description: Advanced LCD Interface for PIC16F877A Using PCF8574
 * This code demonstrates an enhanced interface for LCD (Liquid Crystal Display) with a PIC microcontroller, specifically the PIC16F877A, 
 *utilizing the PCF8574 I2C I/O expander. It initializes the LCD, clears the screen, and prints messages. Additionally, it provides functions 
 *to control the cursor position, send commands or data to the LCD, and manage the backlight.
 */

// Include necessary header files
#include <xc.h>

// Define constants
#define _XTAL_FREQ             16000000
#define I2C_BaudRate           100000
#define SCL_D                  TRISC3
#define SDA_D                  TRISC4

#define LCD_BACKLIGHT          0x08
#define LCD_NOBACKLIGHT        0x00
#define LCD_FIRST_ROW          0x80
#define LCD_SECOND_ROW         0xC0
#define LCD_THIRD_ROW          0x94
#define LCD_FOURTH_ROW         0xD4
#define LCD_CLEAR              0x01
#define LCD_RETURN_HOME        0x02
#define LCD_ENTRY_MODE_SET     0x04
#define LCD_CURSOR_OFF         0x0C
#define LCD_UNDERLINE_ON       0x0E
#define LCD_BLINK_CURSOR_ON    0x0F
#define LCD_MOVE_CURSOR_LEFT   0x10
#define LCD_MOVE_CURSOR_RIGHT  0x14
#define LCD_TURN_ON            0x0C
#define LCD_TURN_OFF           0x08
#define LCD_SHIFT_LEFT         0x18
#define LCD_SHIFT_RIGHT        0x1E
#define LCD_TYPE               2       // 0 -> 5x7 | 1 -> 5x10 | 2 -> 2 lines

// Function prototypes
void main(void);
void I2C_Master_Init(void);
void I2C_Master_Wait(void);
void I2C_Master_Start(void);
void I2C_Master_RepeatedStart(void);
void I2C_Master_Stop(void);
void I2C_ACK(void);
void I2C_NACK(void);
unsigned char I2C_Master_Write(unsigned char data);
unsigned char I2C_Read_Byte(void);