Control circuit using pic 16F84

[lusy]

how can u ask questions in this forum?

[lusy]

can u plz give a program that will control a keypad

[stewartcs]

how can u ask questions in this forum?

You just did.

CS

[stewartcs]

can u plz give a program that will control a keypad

Can you be more specific as to what you want?

CS

[berkeman]

can u plz give a program that will control a keypad

We don't give out answers to homework/coursework problems here on the PF, lusy. We are willing to give you tutorial help, so that you can figure out the answers to your assignments yourself, however.

So here's a basic link to keypad info on wikipedia.org, with other links:

http://en.wikipedia.org/wiki/Keypad

And you should also do some reading about how keyboards are scanned, and why there are diodes in the row/column arrangement of the key switch circuits. After you do that reading, it should be pretty apparent how to use a microcontroller (uC) to do the scanning.

[Ouabache]

Here is some additional light reading (http://www.avr-asm-tutorial.net/avr_en/keypad/keyboard.html) to help you.