I'm not sure why it works like this but I found out what I was doing wrong
shortly after posting my question.
I was actually wasn't using the libusb driver (although I thought I tried
this). I got it working by using the libusbK-inf-wizard.exe from libusbk.
I replaced the driver with WinUSB.sys d
Eric Lundby wrote:
>
> I have spent hours now trying to get communication working with a
> custom USB device on Windows using libusbx. I have communication
> working through a virtual com port so I believe the device is
> functioning as expected.
>
> My device reports that it has 3 interfaces (0, 1
