ProtoDAC TDA1387 X8 project

[varunach]

Finally got my fifopi Q7ll installed. But I stumbled upon an issue. Once I turn on the power on the clean side, 3.3v, of the Q7ll I lose contact with moOde over WiFi. Once I turn it off again, moOde is back!!! Do I have to do something with the audio configuration to get it to connect to the Q7ll?

I’v really enjoyed all the latest discussions on power supply’s and caps. Regarding the Mundorf evo oil I really like them.

@OnkelPH How did you resolve this issue? I just got my IanCanada parts and I have the same issue. 

1. The RPi4 alone with Moode OS on a SD card boots just fine.
2. I installed the RPi4 on top of PurePi and connected the external power supply to Power Pi. I let PurePi charge for 2 hours. All lights lit up as expected. I was able to boot into the Moode OS and was able to access from my browser via Wifi. 
3. I turned the PurePi switch off. Installed the FifoPi Q7 on top of RPi4 GPIO (in other words connected to the dirty side 5V supply). I did not connect the 3.3V clean side supply to FifoPi Q7. Again I was able to boot into Moode OS via Wifi and able to access the interface from my browser. 
4. I turned the PurePi switch off again. Connected the 3.3V terminals from PurePi to FifoPiQ7's J5. And when i turned everything on, I was not able to boot into Moode and it seems to have gone into some sort of unresponsive state. Disconnecting 3.3V terminals from Q7 brings Moode access back. 

I tried all these steps with ProtoDac1387 driver and also with Generic I2S driver (that Ian recommended for Q7). Same issue.

Super frustrating   Any pointers would be appreciated.

CC: @hifinet @Tim Curtis for help as well