FFT

[aslopez]

Hi everyone, i am kind of new with arduino and i would like to display in Processing software a graph of the fft of a signal (pre-amplified) that i am reading from a coil to my arduino, where i could show the different frequencies (from 500 Hz to 30 KHz).

Currently i am using Processing to show the signal and save the data in a file, then i open the file in MATLAB and then MATLAB process the FFT and graph the FFT and the signal.

Does someone know how i can calculate the FFT in my arduino DUE and display it in a graph?

Thanks 

[Palliser]

You may can find some help here:
http://forum.arduino.cc/index.php?topic=225204.0

Regards,

p

[aslopez]

Hi thanks for you replay, i saw that page before and i asked him for help in his blog and he recommended me to ask here, do you know how i can modify his program to send the data to Processing?

[Magician]

Subject line is misleading, I'd suggest something like: "how to send data array to processing" or "how to  use serial link".
Have you seen this section: http://forum.arduino.cc/index.php?board=12.0
FFT library has an example, that's printing out results to PC serial monitor window.
BTW, I published new blog-page, with source code to display fft on the TFT (320x480) screen, spectrogram & bargraph representation.
All you have to do, is re-route data flow from TFT to processing, but I can't help you on this, as I never used Processing before.