USB MIDI Host library tested working for RP2040 and Adafruit_TinyUSB_Arduino

[rppicomidi]

If you want to use the Arduino IDE to implement a USB Host on a RP2040-based board, have a look at my usb_midi_host library. The project has a sample Arduino sketch and a sample C program. The library might work on other boards that the Adafruit_TinyUSB_Arduino project supports, but I have not tested that.

Incidentally, if you want to implement some other host driver that Adafruit_TinyUSB_Arduino does not support, you can use my project as an example of how to do that. It implements the TinyUSB usbh_app_driver_get_cb() to install the important driver functions.