Explore Starter 8051 board has 2 user interface switches on the board which are connected to P3.2 and P3.3 . There are 4 LED's are on board which are also connected to higher four bits of P3. Out of these we will read the status of SW2 ( Connected to P3.3) and will show the status on LED ( Connected to P3.7).

Switch and Led with 8051.c

#include <reg51.h>

sbit LED =  P3^7;		// LED is connected to  P3.7
sbit Switch =  P3^3;   // Switch is connected to P3.3		 

int main() 
{		   
   

P3 = 0x08;			   // Switch declared as input and LED as output

  while(1)
  {
    
  LED = Switch;

  }
	return(0);	   
	

}