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Name: Ruben
eMail: ruben@tlabs.ac.za
Date: April 19, 2004 at 06:29:45
Subject: Keypad+encoder source code
Text: Hi

I am new at C programming so bare with me. Can you please give me the
code for writing a program using a 4x3 keypad with a 74c922 encoder
chip in C? I know that when your DA pin is set high, it tells the
program that data is available, but how do you wright the code to go
fetch the data? Can you help me, I'm really struggling. When the DA pin
goes high it must trigger an external interrupt(INT0) and then it must
detect whick key was pressed according the encoder chip.

Any help would be greatly appreciated!

Regards and Thanx,

Ruben


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