Re: [Libusb-devel] USB VID/PID for open source projects

[Peter S. <pe...@st...>]

Xiaofan Chen wrote:
> > As for test devices I think it is very important to use different
> > vidpids for each actual different device. If it is not the same
> > design then it should not have the same vidpid IMO.
> 
> What do you mean by different design?

Good question.


> I think as long as the end function is the same, the VID/PID
> combination can be the same even if different MCU/MPU is used.
> 
> For example, Linux based Gadget driver will have the
> same VID/PID with given functions even though the
> MPU used can be different.

At the very least I think vidpid should belong to one particular
device software only.

But I actually also think that different hardware running the same
software should have separate vidpids.

The way I think about it is that even if the software is the same,
differences in the hardware can have significant impact on device
functionality, and thus it is important to identify also the
hardware.


//Peter