LCD INTERFACING WITH 8051 IN 8-BIT MODE

Here we use a 16x2 LCD which is interfaced by P89V51RD2 which is a 8051 micricontroller.

A 16x2 LCD is shown below.



Pin configuration is written behind this LCD as...

1       -   GND
2       -   VCC (+5V)
3       -   VEE  (FOR CONTRAST)
4       -    RS    (REGISTER SELECT)
5       -    RW   (READ/WRITE)
6       -    EN    (ENABLE)
7-14  -    DATA PINS D0-D7
15      -   LED PLUS
16      -   LED MINUS

Components required :-

1. 10uf electrolytic capacitor
2. 10k ohm registance
3. 10k ohm variable registance
4. 11.059 MHZ crystal oscilltor
5. 16x2 LCD
6. P89V51RD2 IC
7. 5v battery 

Circuit diagram : - 

Burn this code in microcontroller and Make the connections..

Code :-
----------------------------------------------------------------------------------------------------------------------------------


#include <REG51.H>
int i,j,k;
sbit RS=P3^0;
sbit RW=P3^1;
sbit EN=P3^6;
void delay();
void lcd_cmd(unsigned char value);
void lcd_data(unsigned char value);
char a[6]="ashish";
char b[8]="chittora";


void main()
{
   while(1)
   {   
 lcd_cmd(0x38);
 delay();
 lcd_cmd(0x0e);
 delay();
 lcd_cmd(0x06);
 delay();
 lcd_cmd(0x01);
 delay();
 
 
 for(j=0;j<6;j++)
 {
   lcd_data(a[j]);
delay();
 }
 lcd_cmd(0xc0);
 
 
 for(k=0;k<8;k++)
 {
   lcd_data(b[k]);
delay();
 }
   
  }
}
void delay()
  {
    for(i=0;i<2;i++)
    {
      TMOD=0X01;
      TH0=0X4B;
      TL0=0XFD;
      TR0=1;
      while(TF0==0);
      TF0=0;
      TR0=0;
    }
  }
void lcd_cmd(unsigned char value)
   {
     RS=0;
RW=0;
P2=value;
EN=1;
delay();
EN=0;
   }
void lcd_data(unsigned char value)
   {
     RS=1;
RW=0;
P2=value;
EN=1;
delay();
EN=0;
   }    

----------------------------------------------------------------------------------------------------------------------------------


after this switch on the circuit.

Note :- If you have problem to see characters in LCD then reduce the contrast level of LCD by increasing the resistance of 10k variable resistor.


Contact us for the code in c language.

IF YOU HAVE ANY QUERY THAN CONTACT US OR GIVE YOUR QUERY IN THE QUERY OPTION.      

                                                            GOOD LUCK

More embedded projects >>....                             More MAT LAB projects>>...

More computer science projects >>....