8051: Switch Interface Code

Description:

Interfacing switch with 8051.We now want to control the LED by using switches in 8051Development board. It works by turning ON a LED & then turning it OFF when switch is going to LOW or HIGH.

Code:

#include<reg51.h>

sbit sw=P2^0;

sbit led=P2^1;

void delay(int n);

void delay(int n)

{

        int i,j;

        for(i=0;i<n;i++)

        {

        for(j=0;j<100;j++);

        }

}

void main()

{

while(1)

{

if(sw==0)

{

led=1;

            delay(100);

}

else

{

led=0;

}

}

}

Circuit Diagram: