Pico-PIO-USB as an USB man-in-the-middle?

[eliocor]

Is there any way to program a Pico board as to act as a MITM (man-in-the-middle) between an USB device and its host?
It will be useful as a debugging tool to monitor/inject/modify data from/to the device/host as was doing USBProxy on the beaglebone: see also https://www.youtube.com/watch?v=5JnAeakUBnU

[rppicomidi]

@eliocor It is not a general purpose MITM USBProxy, but I did implement something that modifies data between a MIDI host and MIDI device. See pico-usb-midi-filter. I implemented hooks in the USB stack so that the USB device descriptor the Pico board presents to the PC is the same descriptor that the Pico-PIO-USB host reads from the external MIDI device.

[ax16]

I hope that someday, someone will make a fork dedicated to using pico as MITM USB proxy. I checked out pico-usb-midi-filter but i am unfortunately not experienced enough in C to create it myself.

[Gao-Ruilin]

Hello, I'm trying to do this, and it's going well. I'll let you know when it's ready to use.