1 line interrupted keypad reading
Only one line for 12 buttons ... without polling !!!
see here : http://www.edn.com/contents/images/33105di.pdf
Alain
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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