Chapter 10.5 - Interfacing 7 Segment(Common Anode) LED Display with 8051 Microcontroller on Breadboard - Source Code

You must have already seen how to convert binary decimal into hexadecimal. We are providing a chart which will help you understand how do we glow only specific region of our 7 segment common anode display with 8051 microcontroller.

And here is the source code :

	//****************************************************************************************
	//www.go8051.com
	//Chapter 10
	//Interfacing 7 Segment(Common Anode) LED Display with 8051 Microcontroller on Breadboard
	//Created By go8051.com
	// Open source
	//email : 8051blog@gmail.com
	//****************************************************************************************

	#include<reg51.h> // Header file for 8051 microcontroller
	void delay(); // function prototype for delay function( this function will be used to provide a delay in between blinking showing digits)
	void main() // start of main function
	{
	P2=0; // configure all the pins of Port 1 as output port. All the pin will now act as output port
	while(1) // infinite while loop
	{
	P2=0xc0; // Send Value 0xc0 on Port 2 which will illuminate the 7 segment display to make it 0
	delay(); // halt for some time after displaying the digit(calling delay function)
	P2=0xf9; // Send Value 0xf9 on Port 2 which will illuminate the 7 segment display to make it 1
	delay(); // halt for some time after displaying the digit(calling delay function)
	P2=0XA4; // Send Value 0xA4 on Port 2 which will illuminate the 7 segment display to make it 2
	delay(); // halt for some time after displaying the digit(calling delay function)
	P2=0XB0; // Send Value 0xB0 on Port 2 which will illuminate the 7 segment display to make it 3
	delay(); // halt for some time after displaying the digit(calling delay function)
	P2=0X99; // Send Value 0x99 on Port 2 which will illuminate the 7 segment display to make it 4
	delay(); // halt for some time after displaying the digit(calling delay function)
	P2=0X92; // Send Value 0x92 on Port 2 which will illuminate the 7 segment display to make it 5
	delay(); // halt for some time after displaying the digit(calling delay function)
	P2=0X82; // Send Value 0x82 on Port 2 which will illuminate the 7 segment display to make it 6
	delay(); // halt for some time after displaying the digit(calling delay function)
	P2=0XF8; // Send Value 0xF8 on Port 2 which will illuminate the 7 segment display to make it 7
	delay(); // halt for some time after displaying the digit(calling delay function)
	P2=0X80; // Send Value 0x80 on Port 2 which will illuminate the 7 segment display to make it 8
	delay(); // halt for some time after displaying the digit(calling delay function)
	P2=0X98; // Send Value 0x98 on Port 2 which will illuminate the 7 segment display to make it 9
	delay();
	}
	}

	// this delay function will provide a delay of 1.5 secs approximately
	void delay() // function definition of delay function
	{
	int i,j; // declaring variable i and j
	for(i=0;i<=1275;i++) // first for loop which will loop 1275 times
	for(j=0;j<=1;j++); // second loop which will loop for 2 times(change the delay time '1' to other if you want to increase delay)
	}

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