Hi,
I have a Luckfox Pico board (https://www.luckfox.com/Luckfox-Pico/EN-Luckfox-Pico). From the schematic, I can see that the audio is broken out onto some testpoints labelled TP1, TP2, TP3.
However when I feed audio into TP1, it breaks my USB connection leading me to believe TP1, TP2 and TP3 on my board are actually just P1, P2, P3 from the USB section.
Could somebody please clarify if the codec testpoints are actually TP4,5,6,7 instead? And if possible tell me which is which. I think TP6 is one of the mic inputs (assuming mic0 - injecting audio here and recording does save to channel L) and TP4 is audio out (I get my recorded audio back out if I scope here).
Many thanks