4x4 Keypad Code in CCS C Compiler using PIC16F877, PortC

Nisar · Joined: 16 Nov 2007 Posts: 20

Hello every body
I'm using PIC16F877 and interfacing 4x4 Keypad with Port C.Plz any body send me its Code.I'm using CCS C Compiler.
Regards
Nisar

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Look in the CCS Code Library forum. It has links to a 4x4 keypad driver.

Nisar · Joined: 16 Nov 2007 Posts: 20

Plz any one send me C Code.
My 4x4 Keypad have Connection with PIC16F877 at PortC as following.

Colo Pin_C3
Col1 Pin_C2
Col2 Pin_C1
Col3 Pin_C0

Row0 Pin_C4
Row1 Pin_C5
Row2 Pin_C6
Row3 Pin_C7

all pins are Connected with 10K Pullup resister.
Thanks in advance

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Did you look in the Code Library ? Did you try ? If you did, you would
have found this link:
http://www.ccsinfo.com/forum/viewtopic.php?t=28022&start=14

Nisar · Joined: 16 Nov 2007 Posts: 20

Thanks PCM Now 4x4 Keypad work properly

miji88 · Joined: 06 Apr 2011 Posts: 25 Location: Malaysia

How can I program using ccs compiler for keypad 4x3?
_________________
i'm student that realy need help to learn

temtronic · Posted: Wed Apr 13, 2011 5:28 am

miji88
All you need to do is look at the program that PCMprogrammer offered above. It is well commented and easy to understand, very easy to modify to a 4 x 3 keypad.
Refer to the onscreen help(F11) that CCS supplies to read what the commands/functions/etc. are doing if you're not sure.

miji88 · Joined: 06 Apr 2011 Posts: 25 Location: Malaysia

nice... thanks dude.. I try modified it first.
_________________
i'm student that realy need help to learn

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

CCS Code Library already has the 4x3 driver. You don't have to modify
the 4x4. Here's the link:
http://www.ccsinfo.com/forum/viewtopic.php?t=26333

Also, CCS has their kbd.c driver, which is for a 4x3 keypad: