matrix keypad interfacing with PIC18F4520

[isabella]

hi all,

i want to use a pic and a keypad to display a description on a lcd.
when you press a certain code the corresponding description of that code must be displayed.
the code must be 2 digits, ranging from 00 to 99.

can any one help me with a sample code for reading the 2 digit code that has been enterd into keypad.
note: after entering the 2 digit code, you must pres ''ENTER" and to erase the entry you must press "CLEAR"
also, the number you enter must be displayed on 7segments as well.

please help

 

[babatundeawe]

which pic language re using? i can try if u donnt mind in basic.

 

[isabella]

Hi thanks for replying. I am using mplab and c language. Can anyone help? Please?

 

[xpress_embedo]

Have a look at this link
https://sites.google.com/site/coole...e/pic18f4550/tutorial-list/keypad-interfacing

4X4 Keypad Interfacing with PIC18F4550, have a look at this, and then you can change the code accordingly to your need..
The code is written in Hi-Tech C PIC-18 Compiler, you can easily change that for MPLAB C18 Compiler..

Hope this helps..

 

[babatundeawe]

isabella, try and check outthe site posted above. i checked it out and i think its ok. one thing i found interesting is that it uses interupt on change on portb which makes it good forr u to do other things with the micro like updating ur seven segment. the res of the code is easy. what u need is maybe a look up table or a select case that will compare the code entered then see if it matches whit the one u ve pre programmed on the micro. hope this helps

 

[isabella]

thank you for all your replies. i've just been told that i am not good enough to do this project. maybe its the truth. think im going to leave this project for someone that's better.

thanks anyway guys.