PDA

View Full Version : Goertzel



cartere
10-19-2013, 02:10 AM
Paul


There seems to be this random rumor on the web that you have Goertzel code for the teensy, any truth to it?

PaulStoffregen
10-19-2013, 02:18 AM
Years ago, I did write a 7 band Goertzel DTMF decoder for a different AVR chip. It worked quite well. The Goertzel algorithm was coded in hand optimized assembly and used under 15% of the CPU time for all 7 bands.

That old code was never released. It's collecting dust somewhere.

cartere
10-19-2013, 03:10 AM
Looks like I need to dig into arm_math.