Toggle and control LED by 8051 and keil

LED Lighting / Control LED / Interfacing two LED / LED blinking / Toggle two LED by 8051 and keil

In this topic I shall discuss about the code to control two LED in 8051 and keil. Now I will show you how to interface LED with AT89c51. The code is like that….

//////////////////////////////////////////////////////////////////////////////////////////////////////////////

 //LED blinking//

#include <REG52.H>

sbit LED1=P1^0;

sbit LED2=P1^2;

void delay_ms(int milisec)

{

        int i,j,k;

        for(j=0;j<milisec;j++);

        {

      for(k=0;k<20;k++)    

                for(i=0;i<4898;i++);

        }

}

void main(void)

{

        P1=0x00;                               //Set P1 port in O/P mode

        while(1)

        {

        LED1=1;

        LED2=0;

                delay_ms(500);              //delay of 500 ms

        LED1=0;

        LED2=1;

  delay_ms(500);

 }

}

//////////////////////////////////////////////////////////////////////////////////////////////////////////////

Here I have used Atmel AT89c51 microcontroller, but you can use this code for any AT89xxx family.

The circuit is given below/…..

In this circuit the value of crystal is 12

If you cannot understand the above code you can see this…………….