PIC16F877 GRAPHIC LCD INTERFACE

#include<pic.h>
#include<htc.h>
#include "Picture.h"
#define __PIC16F877_H


// LCD Port and Connection Configurations

#define Output 0

#define ConfigureLCDPINsDirection(Value)    (TRISD = Value,             \
                                             TRISCbits.TRISC3 = Value,  \
                                             TRISCbits.TRISC4 = Value,  \
                                             TRISCbits.TRISC5 = Value,  \
                                             TRISCbits.TRISC6 = Value,  \
                                             TRISCbits.TRISC7 = Value)

#define DataBusLCD      PORTD
#define RegisterSelect  PORTCbits.RC3
#define EnableLCD       PORTCbits.RC4
#define ChipSelect1     PORTCbits.RC5
#define ChipSelect2     PORTCbits.RC6
#define ResetLCD        PORTCbits.RC7

#define Enable  1
#define Disable 0

#define Command 0
#define Data    1

#define DisplayON        63
#define DisplayStartLine 192

#define LeftChip    1
#define RightChip   2
#define BothChip    3

// LCD Index addresses
#define Index0  0x40
#define Index1  0x50
#define Index2  0x60
#define Index3  0x70
#define Index4  0x80
#define Index5  0x90
#define Index6  0xA0
#define Index7  0xB0

// LCD Pages address
#define Page0   0xB8
#define Page1   0xB9
#define Page2   0xBA
#define Page3   0xBB
#define Page4   0xBC
#define Page5   0xBD
#define Page6   0xBE
#define Page7   0xBF

#define ColourON    1
#define ColourOFF   0


void delay(unsigned int i)
{
while(i--);
}

    void InitializeGraphicalLCD(void);
    void ChipSelection(unsigned char Chip);
    void ToggleEnablePin(void);
    void WriteCommandToLCD(unsigned char CommandToLCD, unsigned char SelectChip);
    void WriteDataToLCD(unsigned char DataToLCD, unsigned char SelectChip);
    void WriteAddressToLCD(unsigned char AddressX, unsigned char AddressY, unsigned char SelectChip);
    void ClearScreen(void);
    void FillScreen(void);
    void DisplayPicture(const unsigned char *PtrArray);







void InitializeGraphicalLCD(void)
{
    ConfigureLCDPINsDirection(Output);
    RegisterSelect = Command;
    EnableLCD = Enable;
    DataBusLCD = Disable;
    ChipSelect1 = Disable;
    ChipSelect2 = Disable;
    ResetLCD = Enable;
    delay(1);

    ResetLCD = Disable;                                 // Normal Operation
    WriteCommandToLCD(DisplayON, BothChip);             //  Sending 63 to both chip CS1 and CS2
    WriteCommandToLCD(DisplayStartLine, BothChip);      //  Sending 192 to both chip CS1 and CS2
    ClearScreen();
}

void ChipSelection(unsigned char Chip)
{
    if (Chip == 1)
    {
        ChipSelect1 = Enable;
        ChipSelect2 = Disable;
    }
    else if (Chip == 2)
    {
        ChipSelect1 = Disable;
        ChipSelect2 = Enable;
    }
    else if (Chip == 3)
    {
        ChipSelect1 = Enable;
        ChipSelect2 = Enable;
    }
}

void ToggleEnablePin(void)
{
    delay(1);
    EnableLCD = Enable;
    delay(1);
    EnableLCD = Disable;
}

void WriteCommandToLCD(unsigned char CommandToLCD, unsigned char SelectChip)
{

    // sending data to LCD.
    ChipSelection(SelectChip);
    RegisterSelect = Command;
    DataBusLCD = CommandToLCD;
    ToggleEnablePin();
}

void WriteDataToLCD(unsigned char DataToLCD, unsigned char SelectChip)
{

    // sending data to LCD.
    ChipSelection(SelectChip);
    RegisterSelect = Data;
    DataBusLCD = DataToLCD;
    ToggleEnablePin();
}

void WriteAddressToLCD(unsigned char AddressX, unsigned char AddressY, unsigned char SelectChip)
{
    // sending X address.
    WriteCommandToLCD(AddressX, SelectChip);

    // sending Y address.
    WriteCommandToLCD(AddressY, SelectChip);
}

void ClearScreen(void)
{
    unsigned char X = 0, Y = 0, Page = 0;

    Page = Page0;
    for (X = 0; X < 8; X++)
    {
        WriteAddressToLCD(Page++, Index0, BothChip);
        for (Y = 0; Y < 64; Y++)
            WriteDataToLCD(0x00, BothChip);
    }

}

void FillScreen(void)
{
    unsigned char X = 0, Y = 0, Page = 0;

    Page = Page0;
    for (X = 0; X < 8; X++)
    {
        WriteAddressToLCD(Page++, Index0, BothChip);
        for (Y = 0; Y < 64; Y++)
            WriteDataToLCD(0xFF, BothChip);

    }
}

void DisplayPicture(const unsigned char *PtrArray)
{
    unsigned char X = 0, Y = 0, Page = 0;

    Page = Page0;
    for (X = 0; X < 8; X++)
    {
        WriteAddressToLCD(Page, Index0, LeftChip);
        for (Y = 0; Y < 64; Y++)
            WriteDataToLCD(*PtrArray++, LeftChip);

        WriteAddressToLCD(Page++, Index0, RightChip);
        for (Y = 0; Y < 64; Y++)
            WriteDataToLCD(*PtrArray++, RightChip);
    }
}




int main() {

    InitializeGraphicalLCD();
  //FillScreen();
    ClearScreen();
    DisplayPicture(Picture1);
   
    while(1)
    {
    }

    return 0;
}






//**************************************PICTURE.H******************//




#ifndef PICTURE_H
#define PICTURE_H

#ifdef __cplusplus
extern "C" {
#endif


const unsigned char Picture1 [] ={ /* 0X22,0X01,0X80,0X00,0X40,0X00, */
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};




#ifdef __cplusplus
}
#endif

#endif /* PICTURE_H */


//*********************************************************************//