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LCD InterfacingUSING 8051 C PROGRAMMING

BY VINAY KULKARNI

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LCD

LCD (Liquid Crystal Display) screen is an electronic display module , A 16x2 Lvery basic module and is very commonly used in various devices and circuitusing the same in our experiments .

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Characteristics of LCD display module .

A 16x2 LCDmeans it can display 16 characters per line and

such lines.

In this LCD each character is displayed in 5x7 pixel matrix.This LCD has two registers, namely, Command and Data.

The command register stores the command instructions giv

A command is an instruction given to LCD to do a predefine

initializing it, clearing its screen, setting the cursor p

controlling display etc.The data register stores the data to be displayed on the LCD

The data is the ASCII value of the character to be displayed

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Pin Description

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The steps that has to be done for initializing th

display is given below and these steps are comalmost all applications :1.Send 38Hto the 8 bit data line for initializat2.Send 0FHfor making LCD ON, cursor ON andblinking ON.3.Send06H for incrementing cursor position.4.Send 01Hfor clearing the display and returncursor.

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Sending Data to LCDMake R/W low. // indicating write operation.

Make RS=0 if data byte is a command and mak

if the data byte is a data to be displayed.

Place data byte on the data register.

Pulse EN from high to low. // EN=enable

Repeat above steps for sending another data.

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void main(void)

{

unsigned char arr[15]={'S','D','M','C','E','T','C','S','E',' ','D','E','P','T'};

unsigned char i;

//initializationlcd_init();

while(1)

{

lcd(0x80, 0); // Address of the first line in the LCD

for(i = 0; i

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//funcion for command write into lcd

void lcd(unsigned char addr, bit flag)

{

P0 = addr;

rs = flag; //register control select

rw=0; //write enable

en=1;

en=0;

delay1(500);

en = 1;

}

void delay1 (unsigned int del)

{

while(--del);

}

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For Further Reference check out :

http://www.dnatechindia.com/Tutorial/8051-Tutorial/Interfacing-L

8051.html

http://www.pantechsolutions.net/project-kits/interfacing-lcd-with-

http://www.engineersgarage.com/microcontroller/8051projects/in

lcd-at89c51-circuit

http://www.circuitstoday.com/interfacing-16x2-lcd-with-8051

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THANK YOU

VINAY KULKARNI