Rene Stange

The effort to port this from C++ to C remains huge, I'm sorry. It's not only the xHCI driver. USB on the RPi 4 needs MMU LPAE support (for AArch32)...

Unfortunately I cannot reproduce this issue. I built the Ethernet sample with the same settings with a GCC 9.2.1 toolchain again and tested it with a firmware from Feb 12...

Are you sure, your target platform uses a DWC OTG USB controller, which is the only supported controller by USPi? Otherwise this library won't be of much use for you.

According to the [USB MIDI class spec. 1.0](https://usb.org/sites/default/files/midi10.pdf) only bulk endpoints are used for MIDI streaming. If these devices use interrupt endpoints, this is not class conform. Nevertheless, if these...

Yes, but according to the "Class-specific AC Interface Descriptor" (see B.3.2) in the USB MIDI class 1.0 spec. both given devices support the revision 1.0 of the class spec. The...

The USB MIDI driver has been updated on the *develop* branch to allow to use Interrupt EPs. This driver may work with USB MIDI controllers, which support the USB MIDI...

@pik33 Thanks for info!

The WLAN device driver has [separate entries](https://github.com/rsta2/circle/blob/master/addon/wlan/ether4330.c#L294) for revision 1 and 2 of the 43430 chip, so this difference should be handled well. As I understand it, there is currently...

There is support for USB audio streaming devices (input and output) for the Raspberry Pi 4, 400 and CM4 in Circle 45 now. Unfortunately it turned out, that it is...

@DatanoiseTV I never tested more than one USB audio streaming device, connected at the same time, but I think, there is a good chance, that it will work with two...