C code for interfacing LCD with 8051 and keil

Code for interfacing LCD with 8051 and keil

In this tutorial I will discuss about how to interface LCD with 8051 using C language. I am going to write a simple code to display ‘T’, ‘R’, ‘A’, ‘C’, ‘E’ to the LCD.

I am taking AT89s52 and connect all data pins of LCD with Port one (P1) and connect RS pin to pin 0 of port 2, RW pin to pin 1 of port 2, Enable (E) pin to pin 2 of port 2.

Here is the code……………

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#include <reg51.h>

sfr ldata = 0x90;                                                // P1=LCD data pins

sbit rs = P2^0;

sbit rw = P2^1;

sbit en = P2^2;

void main()

{

Lcdcmd(0x38);

Ms_delay(250);

Lcdcmd(0x0E);

Ms_delay(250);

Lcdcmd(0x01);

Ms_delay(250);

Lcdcmd(0x06);

Ms_delay(250);

Lcdcmd(0x86);                   // Line 1, position 6

Ms_delay(250);

Lcddata(‘T’);

Ms_delay(250);

Lcddata(‘R’);

Ms_delay(250);

Lcddata(‘A’);

Ms_delay(250);

Lcddata(‘C’);

Ms_delay(250);

Lcddata(‘E’);

Ms_delay(250);

}

Void Lcdcmd(unsigned char value)

{

Ldata = value;

rs = 0;

rw = 0;

en = 1;

Ms_delay(1);

en = 0;

return;

}

Void Lcddata (unsigned char value)

{

Ldata = value;

rs = 1;

rw = 0;

en = 1;

Ms_delay(1);

en = 0;

return;

}

Void Ms_delay(unsigned int time)

{

Unsigned int i,j;

For (i=0;i<time;i++)

For(j=0;j<1275;j++);

}