LCD Interfacing with PIC Microcontroller

Diagram Interface

Program to display a string on LCD

/* Program to display a string on LCD */
#include <p18f4550.h>
#define LCD_EN PORTCbits.RC1   // RC1 is used as enable pin
#define LCD_RS PORTCbits.RC0   // RC0 is used as register select pin

// Delay Function
void delay()
{
    unsigned int i;
    for(i=0;i<5000;i++)
    {  }
}

// Global Declaration of strings
unsigned char string1[]={'F','I','R','S','T'};
unsigned char string2[]={'L','A','S','T'};

// Command Function
void SendCommand(unsigned char command)
{
     LCD_RS = 0;  // RS=0
     delay();
     LCD_EN = 1;   // EN=1
     delay();
    PORTB = command;   // Command is placed on data bus
     delay();
    LCD_EN = 0;  // EN=0
     delay();
   }

// Data Function
void SendData(unsigned char lcddata)
{
    LCD_RS = 1;    // RS=0
    delay();
    LCD_EN = 1;    // EN=1
    delay();
    PORTB = lcddata;   // Data is placed on data bus
    delay();
    LCD_EN = 0;   // EN=0
    delay();
}

// Main function
void main()
{
    unsigned char Key,j,p,P;
    TRISB = 0x00;                           //LCD pins as output
    TRISCbits.RC0=0;                 // enable and RS pin of LCD as output
    TRISCbits.RC1=0;
      // Initialize LCD
         P=0X38;                 // LCD COMMAND
         SendCommand(P);   // Called command function
         P=0X0E;                 // LCD COMMAND
         SendCommand(P);
         P=0X01;                  // LCD COMMAND
         SendCommand(P);
     while(1)                           //Forever loop
    {
          P=0X80;                    // LCD COMMAND to display on first line
         SendCommand(P);
     // loop till j is equal to no. of characters in string 1
         for (j=0;j<5  ;j++)
         {
             p=string1[j];          // get character from string
            SendData(p);          // send to display on LCD
         }
        P=0XC0;            // LCD COMMAND to display on SECOND LINE
        SendCommand(P);
// loop till j is equal to no. of characters in string 2
               for (j=0;j< 4 ;j++)
         {
             p=string2[j];                 // get character from string
            SendData(p);                 // send to display on LCD
         }
                delay( );
     } 
   }