I am trying to output sound through the I2S on the J41 header, and by using the jetson-io.py utility to enable the I2S and audio clock I manage to get a clean output to this Digilent breakout board. However, attempting the same with this Adafruit board produces a great amount of static unless I hold it just right (attempted with 5 different boards).
I have a thread regarding this on the Adafruit forum with more details; however, since the Digilent board make use of the Audio clock, and the Adafruit board the I2S SCLK, I was wondering if there is any known issue with the latter? Or if someone has managed to interface a I2S device which makes use of the I2S SCLK?
I have probed the I2S SCLK (and the other I2S pins) and it definitely produces a square wave, though I don’t recall if I checked the voltage output or not. (I don’t have easy access to a scope while working from home).