USB Microphone code not working with latest pico-sdk release (2.1.1)

[ej159]

I have been trying to compile the code against the latest pico-sdk release (2.1.1). The problem I get is that only the usb microphone fails to work. The code compiles and runs on the pico, shows up in lsusb and Device Manager as MicNode but, opening sound settings in both Ubuntu and Windows would hang (as would Audacity). On Ubuntu, dmseg shows an error in initialising the usb device: usb_set_interface failed (-110) and cannot get freq (v2/v3): err -110

As this only affects the usb_microphone code, the problem is likely to do with the TinyUSB library. In going from 2.1.0 to 2.1.1 the Pico-SDK upgraded from TinyUSB to 0.18.0 from 0.17.0. It looks like the TinyUSB API may have changed. Unfortunately I'm not well versed enough in TinyUSB at the moment to see where the problem is.

[mryndzionek]

I'm facing the same issue and I think this is reported here. Seems to be fixed in TinyUSB master. It's marked as a milestone for pico-sdk 2.1.2, so probably we just need to wait.

[aguaviva]

I solved it by using the 2.1.0 SDK by replacing in pico_sdk_import.cmake the lines that mention GIT_TAG main with GIT_TAG 2.1.0