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Thread: DTMF tone detection with PIC
picon face BY : Scott Stephens email (remove spam text)

I was wondering if anyone has used a PIC to detect dtmf. A method that comes
to mind would be to generate all the individual tones with timers based on
the RTCC/TMR0, and then compare the unknown DTMF squarewave input using an
XOR instruction to the individual tones. Any other idea's or methods?

See also: www.piclist.com/techref/pots/dtmf.htm?key=dtmf
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Subject (change) DTMF tone detection with PIC

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