PIC16F-12-I2C-LCD-ControlFunctions

void LCD_Init(unsigned char I2C_Add) 
{
    i2c_add = I2C_Add;
    IO_Expander_Write(0x00);
    __delay_ms(30);
    LCD_CMD(0x03);
    __delay_ms(5);
    LCD_CMD(0x03);
    __delay_ms(5);
    LCD_CMD(0x03);
    __delay_ms(5);
    LCD_CMD(LCD_RETURN_HOME);
    __delay_ms(5);
    LCD_CMD(0x20 | (LCD_TYPE << 2));
    __delay_ms(50);
    LCD_CMD(LCD_TURN_ON);
    __delay_ms(50);
    LCD_CMD(LCD_CLEAR);
    __delay_ms(50);
    LCD_CMD(LCD_ENTRY_MODE_SET | LCD_RETURN_HOME);
    __delay_ms(50);
}

void IO_Expander_Write(unsigned char Data) 
{
    I2C_Master_Start();
    I2C_Master_Write(i2c_add);
    I2C_Master_Write(Data | BackLight_State);
    I2C_Master_Stop();
}

void LCD_Write_4Bit(unsigned char Nibble) 
{
    // Get The RS Value To LSB OF Data  
    Nibble |= RS;
    IO_Expander_Write(Nibble | 0x04);
    IO_Expander_Write(Nibble & 0xFB);
    __delay_us(50);
}

void LCD_CMD(unsigned char CMD) 
{
    RS = 0; // Command Register Select
    LCD_Write_4Bit(CMD & 0xF0);
    LCD_Write_4Bit((CMD << 4) & 0xF0);
}

void LCD_Print_Char(char Data)
{
    RS = 1;  // Data Register Select
    LCD_Write_4Bit(Data & 0xF0);
    LCD_Write_4Bit((Data << 4) & 0xF0);
}

void LCD_Print_String(char* Str)
{
    for(int i=0; Str[i]!='\0'; i++)
       LCD_Print_Char(Str[i]); 
}

void LCD_Set_Cursor(unsigned char ROW, unsigned char COL) 
{    
    switch(ROW) 
    {
        case 2:
            LCD_CMD(0xC0 + COL-1);
            break;
        case 3:
            LCD_CMD(0x94 + COL-1);
            break;
        case 4:
            LCD_CMD(0xD4 + COL-1);
            break;
        default:
            LCD_CMD(0x80 + COL-1);
    }
}

void Backlight(void) 
{
    BackLight_State = LCD_BACKLIGHT;
    IO_Expander_Write(0);
}

void noBacklight(void) 
{
    BackLight_State = LCD_NOBACKLIGHT;
    IO_Expander_Write(0);
}

void LCD_SL(void)
{
    LCD_CMD(0x18);
    __delay_us(40);
}

void LCD_SR(void)
{
    LCD_CMD(0x1C);
    __delay_us(40);
}

void LCD_Clear(void)
{
    LCD_CMD(0x01); 
    __delay_us(40);
}