// LCD.h:   Sends data to LCD via I2C BUS
//
//
//    Author:     Ali Topping
//    Date:       01/3/06
//    Version:    1.1
//    Notes:      SCL and SDA must be set to outputs in TRISC.
//    PIC:        18F4585
//    Software:   MikroC 5.0.0.3
//    Hardware:   LCD03  - www.robot-electronics.co.uk


#define     DATA_RATE       100000       // I2C Data Rate, 100K, 400k or 3.4MHz
#define     LCDW            0xC6          // LCD address + Write bit
#define     LCDR            0xC7          // LCD address + Read bit



//===============
//  HEADER FILE PROTOTYPES

void LCD_Update(unsigned char DATA);
void Init_LCD(void);


/********************************************************************
*    Function Name:  LCD_Update                                     *
*    Return Value:   void                                           *
*    Parameters:     DATA: Data to be sent to LCD                   *
*    Description:    This routine sends data out to the LCD on the  *
*                    I2C BUS.                                       *
********************************************************************/

void LCD_Update(unsigned char DATA)
{
   I2C_Start();
      while(!I2C_Is_Idle()) asm nop;   // Send Start condition
   I2C_Wr(LCDW);                       // Write to LCD03
      while(!I2C_Is_Idle()) asm nop;
   I2C_Wr(0);                          // Write to register 0
      while(!I2C_Is_Idle()) asm nop;
   I2C_Wr(DATA);                       // Write DATA to LCD (Command or ascii value)
   while(!I2C_Is_Idle()) asm nop;      // Must wait for bus to be cleared before I2C_Stop();
   I2C_Stop();
   


   
}

/********************************************************************
*    Function Name:  Init_LCD                                       *
*    Return Value:   void                                           *
*    Parameters:     void                                           *
*    Description:    This routine initialises the LCD and then      *
*                    clears the initial Data from the LCD.          *
********************************************************************/

void Init_LCD()
{

   I2C_Init(100000);                    // Init Baud Rate
   I2C_Start();                         // Send start condition.
      while(!I2C_Is_Idle()) asm nop;    
   I2C_Wr(LCDW);                        // Write to LCD03
      while(!I2C_Is_Idle()) asm nop;
   I2C_Wr(0);                           // Write to register 0
      while(!I2C_Is_Idle()) asm nop;
   I2C_Wr(12);                          // Clears LCD03's Screen
   while(!I2C_Is_Idle()) asm nop;       // Wait for bus to be cleared before I2C_Stop();
   I2C_Stop();                          // Send stop bit
   
}