Embedded system: Interfacing various peripherals with 8051 microcontroller: Interfacing 7 Segment 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

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

C code for 7 segment interfacing with 8051:

Code With Comments:

#include<reg51.h> //Library extention to AT89c51 microcontroller in embedded-c

void main() //main program starts from here

{

unsigned char seg[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//Hex number equivalent of 0 to 9

unsigned x; //declare variable x

unsigned int i; //declare integer variable i

P1=0x00;//configure port-1 as output port by sending 0x00

while(1) //this is infinite loop to see result without breaking operation

{

for(x=0;x<10;x++)//loop to run 10 times to display 0 to 9

{

P1=seg[x];//send segment of 0 to 9 as declared above

for(i=0;i<60000;i++);//delay of certain seconds set between two numbers to be displayed

}

Code without comments (for simplicity)

#include<reg51.h>

void main()

{

unsigned char seg[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};

unsigned x;

unsigned int i;

P1=0x00;

while(1)

{

for(x=0;x<10;x++)

{

P1=seg[x];

for(i=0;i<60000;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 "7 segment display" and select "7 segment display common anode" 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

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