Re: [pyusb-users] Could not reset device

[Yuxuan C. <yux...@gm...>]

Hi Tormod,

Thank you very much for your response. Speaking of driver, I was wondering
if PyUSB could recognize device on another driver?
Currently, in order for PyUSB to recognize the device, the device has to be
on the "libusb-win32 devices" driver. But I need the device to be on
another driver compatible with a software used to trigger data transfer,
since I don't know how to trigger data transfer with PyUSB library.

Sincerely,
Yuki

On Thu, Jan 24, 2019 at 5:29 AM Tormod Volden <lis...@gm...>
wrote:

> On Wed, Jan 23, 2019 at 10:44 PM Yuxuan Chen wrote:
> > I'm using this library on a Windows 7 machine, with libusb version
> 1.2.6.0. When I try to reset the device after encountering an error:
>
> > I get a usb.core.USBError: could not reset device, win error: A device
> attached to the system is not functioning. Error Message
>
> Hi,
>
> Please copy and paste text error messages instead of linking to
> screenshots...
>
> >> As a side explanation, I'm trying to reset the device because after
> sending 3 messages to the device, I always get a timeout error, which then
> requires me to unplug and plug in the device again. After doing some
> research I found that someone had solved this problem by using the reset
> functionality, which brought me here.
>
> Please see the detailed information at
> https://github.com/libusb/libusb/wiki/Windows . There are many options
> for drivers and associated .dll libraries on Windows. Since USB resets
> are not supported by the WinUSB driver, you must ensure that you use
> another driver, e.g. libusbk.sys. Use zadig to switch the registered
> driver for your device. I don't know if a wrong driver is the problem
> in your case, but it could be helpful to know which driver you are
> using, in order to help you further.
>
> OTOH, it would have been better to fix the device or the communication
> so that resets are not needed!
>
> Regards,
> Tormod
>
> >
> > What am I doing wrong? Thank you very much in advance for helping.
> >
>
>
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