hello friends,

i built a program on pcwhd ccs compiler for simple three leds.After checking the program on Proteus 7.4 sp3 the problem is that i programmed it such that if i press push button(s1==) then led should turn on but on proteus 7.4 pro the leds are working without pressing push button

here is code;

#include<16f877A.h> 
#fuses NOWDT,HS,NOLVP,NOPROTECT 
#use delay(clock=20Mhz) 
#bit l1=5.0 
#bit l2=5.1 
#bit l3=5.2 
#bit s1=6.0 
main()
{
   set_tris_a(0b000000); 
   set_tris_b(0b11111111);
   l1=l2=l3=0;
   while(1) 
   {
     if(s1==0) 
    {
       l1=1; delay_ms(100);
       l1=0; delay_ms(100);
       l2=1; delay_ms(100);
       l2=0; delay_ms(100);
       l3=1; delay_ms(100);
       l3=0;
     }
   }
}

 

I have never programmed in this before so my answer could be total garbage. for the conditional statement: if(s1 ==0), try and just put if(s1).

The reason is because I had a similar issue when I programmed in AVR but this may not solve your solution.