LED not glowing on off by push button with PIC18f2455 in Proteus

Question

I searched around much to glow the LED on pressing PUSH Button in Proteus . But LED glows on its on and do not turn Off on pressing Push Button in Proteus. I am working on Simulation with PIC18F2455 and here is the MicroC code.

void main() {

 TRISB.B0=1; //input button
 TRISB.B7=0; //output

 while (1)
 {

   if( PORTB.B0 == 0 )
   {
     PORTB.B7=1;   
   }
   else
   { 
     PORTB.B7=0;  
   }

 }     
}

Answer 1

Nabeel: Based on your post it looks like you might not have hardware design properly which changes the status of Push Button Pin when you press it. You mention that LED glows right away then there can be wrong connection either with switch or with LED.

Please refer this circuit diagram:-

This is for AT89S51 but you can see how pull-up is connected with Push button Input pins S1 and S2.