[libopencm3-devel] USB MIDI not working

[Thorsten <Tho...@gm...>]

Hi,

I managed to build locm3 and to run the blink example.

I now compiled the usbmidi.c example for the stm32f4 discovery, but when
plugging in the usb cable, Win7 (64-bit) reports "unknown device".

I compiled a USB CDC example using CubeMX before, and it worked. So the
hardware is ok. I also tried different usb-ports on my PC, but without
success.

Do you have any advice on how to solve this problem?

-Thorsten