PIC - Goertzel - Tone Decoding - etc

[KammutierSpule]

Hi all!
I'm wondering if a Goertzel Algoritm can be implemented in a PIC microcontroler with ADC convertion...

What I would expect in terms of detection speed?
Can the Goertzel A. able to give us the streng of signal detected?

Any other ideias/opinions?
Thanks in advance.
bye,
KS

 

[Madcow]

Here is a modified version of the algorithm.

http://www.geocities.com/constantinescuradu/content/dtmf.htm

Here is the c code. Needs some mods for running on a pic.
ftp://ftp.embedded.com/pub/2002/09banks/

May want to try the walsh transform.

http://www.embedded.com/code/master.htm

Have not tried any of these so I don't know what kind of
preformence you'll get, but it should be enough to get started.

 

[AllisonA]

Did anyone end up getting successful code to implement the Goertzel algorithm over a larger span of frequencies on a PIC? I've looked online and can't find anything.

 

[MacGyverS2000]

Allison,

Were my comments to your thread on the MicroChip forum not enough to get you up and running?

Your highest frequency detectable is dependant upon the sampling frequency... if your chip is stuck at 20MHz (which locks in your max sampling rate), then there's not much else you can do.


Dan
Owner

http://www.Hi-TecDesigns.com

 

[jsolar]

Detection speed is a function of your SNR and lowest freq. tone, not the PIC. The PIC MIPS limitation determines your maximum sample frequency. What is the problem or application? The algorithm you chose is considered very good for certain problems, but may not be optimum for other.