I am using jetson nano production module . I enabled i2s4 and it can record stereo Adafruit MEMS as follows
I did make i2s4 stereo Adafruit I2S MEMS microphone working by doing following command
amixer -c tegrasndt210ref cset name=‘ADMAIF1 Mux’ I2S4
arecord -D hw:tegrasndt210ref,0 -r 48000 -f S32_LE -c 2 -d 10 test.wav.
I also tried to connect the 4 channel tdm mic arrary on the same i2s4 pin. but i can not make recording working.
amixer -c tegrasndt210ref cset name=‘I2S4 codec frame mode’ dsp-a
arecord -D hw:tegrasndt210ref,0 -c 4 -r 48000 -f S32_LE cap.wav
My understanding is that i dont have to change the i2s4 pin configuration as it is alreayd enabled because i can record Adafruit stereo mic already. right ? what is the correct tdm configuration , I attaching the mic datasheet and mic array spec .