Re: [libusb] Windows forgetting filters?

[Xiaofan C. <xia...@gm...>]

On Sat, Mar 10, 2018 at 2:43 AM, Tim Roberts <ti...@pr...> wrote:
> Robert Poor wrote:
>> ...
>> Two questions:
>>
>> * I know that libusb-win32 is long in the tooth.  Is there something
>> else we should be using as the backend for PyFtdi?
>>
>> * From time to time, Windows appears to forget about the filter,
>> requiring the user to re-run the filter installer.  Do you have
>> insights on how or why this happens (and how to prevent it)?
>
> Unless your device has a serial number, every time you move it to a
> different port or a different hub, it is seen as a brand-new device, and
> a fresh driver record is created.
>
> I don't know how deep you want to go.  It is certainly possible to have
> your application use the extremely verbose SetupDi APIs to scan through
> the USB devices, check whether they have the filter, add the filter, and
> restart the device.

Pete's libwdi may be used as well.
https://github.com/pbatard/libwdi

Zadig is an example provided in libwdi, it has the feature to install
libusb-win32 filter to a USB device or an interface of a USB composite
device.

There are command line example as well.

-- 
Xiaofan