4X4 Key Pad Scanning.

Code Warrior · Sep 1, 2006

Hello,
I want to attach 4X4 key pad to AT89S52 on port P0. Please suggest me code in assembly as well as in C. So I can experiment on the same. Please do the need full.

IanP · Sep 1, 2006

'ASM':
**broken link removed**
All what you need to do is to change P1.0 to P0.0 .. and so on .. and don't forget about 8x10kΩ pullups on PORT0 ..

'C':
http://www.blitzlogic.com/kbd_C.HTM

Regards,
IanP

Code Warrior · Sep 1, 2006

Thanks IanP for help. Can you suggest me how to write keyboard code for 8051 in C.

4X4 Key Pad Scanning.

Code Warrior

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IanP

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Code Warrior

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4X4 Key Pad Scanning.

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