Chapter 3 : LCD Programming

LCD Circuit

//Exercise1LCD : Display “WELCOME”

#include <18f4550.h> //Header File

#fuses HS, NOWDT, NOLVP ,NOPROTECT

#use delay (clock=20M)

//Define LCD PIN

#define LCD_ENABLE_PIN  PIN_D0

#define LCD_RS_PIN      PIN_D1

#define LCD_RW_PIN      PIN_D2

#define LCD_DATA4       PIN_D4

#define LCD_DATA5       PIN_D5

#define LCD_DATA6       PIN_D6

#define LCD_DATA7       PIN_D7

 

//Include LCD Library

#include //Library LCD

 

//Main Function

Void main()

{

   lcd_init(); //Initialize LCD

  

   While(true)

   {

         Printf(lcd_putc,”\fWELCOME\nMY FRIEND”);

 

 

                      delay_ms(100);

 

     }

 

}

 

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

 

 

//Exercise2LCD : Display “WELCOME” at correct coordinate

 

#include <18f4550.h>//Header File

#fuses HS, NOWDT, NOLVP ,NOPROTECT

#use delay (clock=20M)

 

//Define LCD PIN

#define LCD_ENABLE_PIN  PIN_D0

#define LCD_RS_PIN      PIN_D1

#define LCD_RW_PIN      PIN_D2

#define LCD_DATA4       PIN_D4

#define LCD_DATA5       PIN_D5

#define LCD_DATA6       PIN_D6

#define LCD_DATA7       PIN_D7

 

//Include LCD Library

#include //Library LCD

 

//Main Function

 

Void main()

{

     Lcd_init(); //Initialize LCD

    

     While(true)

     {

          Lcd_putc(“\f”); //Clear screen

          Lcd_gotoxy(3,1);

          Lcd_putc(“PRAY TO”);

          Lcd_gotoxy(5,2);

          Lcd_putc(“MH370”);

          Delay_ms(100);

 

 

     }

 

}

 

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

 

//Exercise3LCD : Message blink

 

#include <18f4550.h>//Header File

#fuses HS, NOWDT, NOLVP ,NOPROTECT

#use delay (clock=20M)

 

//Define LCD PIN

#define LCD_ENABLE_PIN  PIN_D0

#define LCD_RS_PIN      PIN_D1

#define LCD_RW_PIN      PIN_D2

#define LCD_DATA4       PIN_D4

#define LCD_DATA5       PIN_D5

#define LCD_DATA6       PIN_D6

#define LCD_DATA7       PIN_D7

 

//Include LCD Library

#include //Library LCD

 

//Main Function

 

Void main()

{

     Int I;

     Lcd_init(); //Initialize LCD

    

     While(true)

     {

          For(i=0; i<=4; i++)

          {

             

              Lcd_putc(“\f”); //Clear screen

              Delay_ms(250);

              Lcd_gotoxy(3,1);

              Lcd_putc(“PRAY TO”);

              Lcd_gotoxy(5,2);

              Lcd_putc(“MH370”);

              Delay_ms(250);

          }

 

 

     }

 

}

 

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

 

//Exercise4LCD : Scroll Message Left Right

 

#include <18f4550.h>//Header File

#fuses HS, NOWDT, NOLVP ,NOPROTECT

#use delay (clock=20M)

 

//Define LCD PIN

#define LCD_ENABLE_PIN  PIN_D0

#define LCD_RS_PIN      PIN_D1

#define LCD_RW_PIN      PIN_D2

#define LCD_DATA4       PIN_D4

#define LCD_DATA5       PIN_D5

#define LCD_DATA6       PIN_D6

#define LCD_DATA7       PIN_D7

 

//Include LCD Library

#include //Library LCD

 

//Main Function

 

Void main()

{

     Int I;

     Lcd_init(); //Initialize LCD

    

     While(true)

     {

          For(i=1; i<=2; i++)

          {

             

              Lcd_putc(“\f”); //Clear screen

              Lcd_gotoxy(i,1);

              Lcd_putc(“PRAY TO”);

              Lcd_gotoxy(16-i,2);

              Lcd_putc(“MH370”);

              Delay_ms(250);

          }

 

 

     }

 

}

 

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

//Exercise5LCD : Scroll Message Up Down

 

#include <18f4550.h>//Header File

#fuses HS, NOWDT, NOLVP ,NOPROTECT

#use delay (clock=20M)

 

//Define LCD PIN

#define LCD_ENABLE_PIN  PIN_D0

#define LCD_RS_PIN      PIN_D1

#define LCD_RW_PIN      PIN_D2

#define LCD_DATA4       PIN_D4

#define LCD_DATA5       PIN_D5

#define LCD_DATA6       PIN_D6

#define LCD_DATA7       PIN_D7

 

//Include LCD Library

#include //Library LCD

 

//Main Function

 

Void main()

{

     Int I;

     Lcd_init(); //Initialize LCD

    

     While(true)

     {

          For(i=1; i<=2; i++)

          {

             

              Lcd_putc(“\f”); //Clear screen

              Lcd_gotoxy(5,i);

              Lcd_putc(“PRAY TO”);

              Lcd_gotoxy(5,i-1);

              Lcd_putc(“MH370”);

              Delay_ms(250);

          }

 

 

     }

 

}

 

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

 

//Exercise4LCD : Button

 

#include <18f4550.h>//Header File

#fuses HS, NOWDT, NOLVP ,NOPROTECT

#use delay (clock=20M)

 

//Define LCD PIN

#define LCD_ENABLE_PIN  PIN_D0

#define LCD_RS_PIN      PIN_D1

#define LCD_RW_PIN      PIN_D2

#define LCD_DATA4       PIN_D4

#define LCD_DATA5       PIN_D5

#define LCD_DATA6       PIN_D6

#define LCD_DATA7       PIN_D7

#define BUTTON          PIN_B0

//Include LCD Library

#include //Library LCD

//Main Function 

Void main()

{

     Set_tris_b(0xff);

     Int I;

     Lcd_init(); //Initialize LCD 

     While(true)

     {

          If(input(BUTTON))

          {

              Lcd_putc(“\fNO BUTTON\nPRESSED”);

              Delay_ms(100);

          }

          Else

          {

               For(i=1; i<=16; i++)

               {

                   Lcd_putc(“\f”); //Clear screen

                   Lcd_gotoxy(i,1);

                   Lcd_putc(“PRAY TO”);

                   Lcd_gotoxy(16-i,2);

                   Lcd_putc(“MH370”);

                   Delay_ms(250);

              }

          }

          }

     }

} 

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