Hardware is not working as per software

[inner_ideas]

Dear All,
I have write code in MikroC Pro for PIC16F628A micro controller. I have programmed this code in Proteous simulation. It is working fine , Unfortunately when I burn this software in Micro controller, Micro controller is not showing anything.


When I press button , It turns ON LED. If I press button for longer time. It turns ON another LED. But in hardware it is not functioning while pressing button. Please guide. What can be the problem.


I have the same frequency oscillator in simulation and externally. That is 20MHz. Thanks for your quick response.

 

[mathespbe]

Cheeck your hardware connections...

 

[jayanth.devarayanadurga]

If project on breadboard then use 4 MHz crystal.

 

[inner_ideas]

Why, I need to use 4 MHz crystall. because I am doing timer based decesion. so that is why 20MHz is worth while.

 

[jayanth.devarayanadurga]

Use 4 MHz crystal. It doesn't avoid you from writing Timer code.

 

[inner_ideas]

Dear I will try to use 4 MHz crystal. but please explain me why we need to put 4MHz crystall? what is the difference betweem both.?

 

[inner_ideas]

Hi:
I have used 4MHz crystall. System is working. One thing that is annoying me is when I put analgoue meter -ve terminal on ground and put +ve terminal on any pin of micr controller. LED turns off automatically. Please guide