I don't know if this is the right place to ask this question,

Archive FastLED Archive
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1

I don’t know if this is the right place to ask this question, but here goes:
Does anyone here have any experience with a Teensy3.1, using OctoWS2811, FastLED and FFT all together?

Ever since I switched to OctoWS2811 output on the Teensy3.1, I get very weird FFT results (using A2 (Pin 16) as audio input).
Today I managed to look at the incoming waveform with a scope and there seems to be data outputting on pin 16. (?!??)
As far as I read in the description, OctoWS2811 uses pins 2,14,7,8,6,20,21,5 to output LED data. Are any other pins affected by the DMA-output-wizardry as well? What Analog Input pin can I use for the FFT?

What amazes me most so far is, that the FFT library still managed to get (some) data out of A2 while FastLED/OctoWS2811 was using the same pin to write out LED data…

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Read http://www.pjrc.com/teensy/td_libs_OctoWS2811.html - pins 15/16 are wired together, as the signal between those two pins is what’s used to drive DMA.

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Thank you, @Daniel_Garcia ​ and sorry for not reading the manual properly :s

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No worries - I was on the phone so couldn’t type much - wasn’t sure if there were other pin things on that page that I missed.