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4X4 Keypad 4x io

 
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Storic



Joined: 03 Dec 2005
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4X4 Keypad 4x io
PostPosted: Sun Feb 12, 2006 11:29 pm     Reply with quote
I found this in the tech tip from microchip has any one done any coding for something like this, Tech Tip #12 microchip
2 x analog and 2 x Digital IO = 4 x4 matrix keypad
http://ww1.microchip.com/downloads/en/devicedoc/41261a.pdf

I would like some guidance to this

Andrew
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MikeValencia



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PostPosted: Sun Feb 12, 2006 11:57 pm     Reply with quote
What guidance do you want? The tech tip #12 has nine well-documented step-by-step instructions on how to implement it.
MikeValencia



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PostPosted: Mon Feb 13, 2006 12:03 am     Reply with quote
http://ww1.microchip.com/downloads/en/appnotes/00529e.pdf

The above document explains 4x4 keypad multiplexing very thoroughly. You can also read the well-commented assembly language program that goes with it.

I'm sure you can use the app note and the tech tip documents to write C code for it.
Storic



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PostPosted: Mon Feb 13, 2006 12:06 am     Reply with quote
After some consideration. I was tring to code it simular to the KBD.C driver. It is a different animal and need to be coded differently. I will research more.

Andrew
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