Hi Waqar,

Do things one at a time.....

As Erik suggested:

1) Have you made a blinking LED a) using a program loop and b) using timer interrupt and successfully downloaded, debugged and operated that.

2) Have you familiarized yourself enough with the "bible" chapters 1,2 and 3 to have a good idea of what information is there and where it is.

After this exercise, try to turn on/off an blinking LED indicator by detecting a button.

Those may be too simple for you, or you may think that those are not related to your problem. Belive me, You will think differently after these exercises.

Come back and I think all people here are willing to assist you to do the next step.

I have no doubt that you tried to learn, but "go back" to basic first and build your knowledge one step a time...

Otherwise, I myself as some other members of the forum, will simply skip every post from you...

Good luck

Lawrence