Embedded system: Interfacing various peripherals with 8051 microcontroller: Interfacing 16x2 LCD display with 8051 using Keil c51 and Proteus simulator

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Keil c51:

DevC++ compiler(or IDE)

Download link: Click here

step-1: right click on "Keil uvision" and click on "run as administrator"

step-2: now go to project >> new project >> "project_name.uvproj"

step-3: select "at89c51" as shown below

step-3: now file >> new file

step-4: click on save as then save with "file_name.c" i.e. with ".c" extension

step-5: now copy code given below and paste and save it, as shown below

step-6: to the left side of window right click on "Source group 1" and then click on "add existing file to source group 1"

step-7: now click on project >> build target to compile this code i.e. to check if any error in code

step-8: to generate "hex file" of this code right click on "target 1" tab to the left side of your window and then click on "options for target 'target 1'... " as shown below

step-9: now change frequency to "11.0592MHz" and tick to "use on-chip ROM" as shown below

step-10: now in same window options click on output >> tick to "create hex file" as shown below

step-11: click again on "build target" to create "hex file" as shown below

Embedded C code :

Code without comments (for simplicity)

#include<reg51.h>

sbit rs=P1^0;

sbit rw=P1^1;

sbit en=P1^2;

void lcdcmd(unsigned char);

void lcddat(unsigned char);

void delay();

void main()

{

P2=0x00; //output i.e. d0-d7 connection

while(1)

{

lcdcmd(0x38); //for 5x7 matrix

delay();

lcdcmd(0x01); //clearing screen

delay();

lcdcmd(0x01); //cursor blinking

delay();

lcdcmd(0x0c); //display ON

//delay();

lcddat('E');

//delay();

lcddat('M');

//delay();

lcddat('B');

//delay();

lcddat('E');

//delay();

lcddat('D');

//delay();

lcddat('D');

//delay();

lcddat('E');

//delay();

lcddat('D');

//delay();

lcddat(' ');

//delay();

lcddat('S');

//delay();

lcddat('Y');

//delay();

lcddat('S');

//delay();

lcddat('T');

//delay();

lcddat('E');

//delay();

lcddat('M');

//delay();

}

void lcdcmd(unsigned char val)

{

P2=val;

rs=0;

rw=0;

en=1;

delay();

en=0;

}

void lcddat(unsigned char val)

{

P2=val;

rs=1;

rw=0;

en=1;

delay();

en=0;

}

void delay()

{

unsigned int i;

for(i=0;i<12000;i++);

}

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Proteus:

Download link: Click here !

step-1: right click on "Proteus 8 professional"(whichever version available) and "run as administrator"

step-2: now go to project >> new project >> "New Project.pdsprj"

step-2: click on "P" and open window for "pick devices" as shown below

step-3: now type "at89c51" and select microcontroller then press ok

step-4: now type "16x2 LCD display" and select "LM016L" as shown below

step-5: now draw circuit as shown below

step-6: click on "terminal" icon to left side window and then select "power" label and connect to 7 segment display as shown below

step-7: now double click on microcontroller symbol then "edit component" window will open. then click on "folder symbol" to select ".hex" file and change frequency to 11.0592MHz as shown below

Note- make sure you know path of ".hex" file generated through Keil c51 as shown below

e.g. - ..\..\..\Keil_v5\C51\Examples\my project\Objects\7segment 8051.hex