Re: [pyusb-users] Fwd:

[Jonas M. <jo...@pr...>]

On Sun, Apr 25, 2021 at 08:54:20PM +0300, Арам Абовян wrote:
> thanks for the previous answer. I also get the error.
> 
> 
> When I applied the following few lines in IDLE Python GUI:
> 
> import usb.core
> 
> dev = usb.core.find(idVendor=0x10c4, idProduct=0xea61)
> ep = dev[0].interfaces()[0].endpoints()[0]
> i = dev[0].interfaces()[0].bInterfaceNumber
> dev.reset()
> 
> if dev.is_kernel_driver_active(i):
>     dev.datach_kernel_driver(i)

The is_kernel_driver_active() and detach_kernel_driver() methods are not
implemented by LibUSB on Windows.[1]

If you still need to detach the driver, that is, if the current OS
driver is not compatible with LibUSB, you must to it manually: the
recommended method on Windows is to use Zadig,[2] and suggest you stick
with the WinUSB option unless you have a good reason not to.

That said, don't replace the driver if you don't need to; you could
unintentionally block access to the device from other programs, as well
as invite problems from potential corner cases.

[1] https://libusb.sourceforge.io/api-1.0/group__libusb__dev.html#ga1cabd4660a274f715eeb82de112e0779
[2] https://github.com/libusb/libusb/wiki/FAQ#How_to_use_libusb_under_Windows

Jonas

> 
> dev.set_configuration()
> eaddr = ep.bEndpointAddress
> 
> r = dev.read(eaddr, 1024)
> 
> print(r)
> 
> 
> I have got the following response :
> Traceback (most recent call last):
>   File "C:\Users\Администратор\Desktop\davis\main.py", line 17, in <module>
>     if dev.is_kernel_driver_active(i):
>   File
> "C:\Users\Администратор\Desktop\davis\venv\lib\site-packages\usb\core.py",
> line 1098, in is_kernel_driver_active
>     return self._ctx.backend.is_kernel_driver_active(
>   File
> "C:\Users\Администратор\Desktop\davis\venv\lib\site-packages\usb\backend\libusb1.py",
> line 915, in is_kernel_driver_active
>     return
> bool(_check(self.lib.libusb_kernel_driver_active(dev_handle.handle,
>   File
> "C:\Users\Администратор\Desktop\davis\venv\lib\site-packages\usb\backend\libusb1.py",
> line 600, in _check
>     raise NotImplementedError(_strerror(ret))
> NotImplementedError: Operation not supported or unimplemented on this
> platform
> 
> 
> чт, 22 апр. 2021 г., 15:36 Jonas Malaco via pyusb-users <
> pyu...@li...>:
> 
> > On Thu, Apr 22, 2021 at 01:38:58PM +0300, Арам Абовян wrote:
> > > ---------- Forwarded message ---------
> > > От: Aram Abovyan <abo...@ya...>
> > > Date: чт, 22 апр. 2021 г., 13:37
> > > Subject:
> > > To: abo...@gm... <abo...@gm...>
> > >
> > >
> > > I am very new to PyUSB and any help from PyUSB experts will be highly
> > > appreciated. .
> > >
> > > When I applied the following few lines in IDLE Python GUI,
> > > ---------------------------------------------------------------
> > >
> > > import os
> > > os.environ['PYUSB_DEBUG'] = 'debug'import usb.core
> > > usb.core.find()
> > >
> > > ----------------------------------------------------------------
> > >
> > > I have got the following response :
> > >
> > > =======================  =======================
> > >
> > >
> > >
> > > 2021-04-22 10:29:59,680
> > DEBUG:usb.backend.libusb1:_LibUSB.__init__(<WinDLL
> > 'C:\Windows\system32\libusb-1.0.dll', handle 6b600000 at 0x3dc53fd250>)
> > > 2021-04-22 10:29:59,688 INFO:usb.core:find(): using backend
> > "usb.backend.libusb1"
> > > 2021-04-22 10:29:59,688
> > DEBUG:usb.backend.libusb1:_LibUSB.enumerate_devices()
> > > 2021-04-22 10:30:02,122
> > DEBUG:usb.backend.libusb1:_LibUSB.get_device_descriptor(<usb.backend.libusb1._Device
> > object at 0x0000003DC73C5DC0>)
> > > 2021-04-22 10:30:02,123
> > DEBUG:usb.backend.libusb1:_LibUSB._finalize_object()
> > >
> > >
> > >
> > > I have googled that, but did not understand much from the serach-
> > > results.
> >
> > There is absolutely nothing wrong here.
> >
> > You enabled PYUSB_DEBUG, and called usb.core.find().
> >
> > The default is for find() to find (at most) a single USB device, which,
> > according to the debug output, it did (even though it appears that you
> > omitted the IDLE output that looks something like `<DEVICE ID ffff:ffff
> > on Bus 001 Address 001>`).
> >
> > Maybe you wanted to store the device returned by find() somewhere?
> >
> > Also, generally speaking, you either want to find one of a specific device
> >     usb.core.find(idVendor=<...>, idProduct=<...>)
> > or all devices (optionally also filtering by idVendor and/or idProduct)
> >     usb.core.find(find_all=True)
> >     usb.core.find(find_all=True, idVendor=<...>)
> >     usb.core.find(find_all=True, idVendor=<...>, idProduct=<...>)
> > but rarely do you need a single randomly picked device.
> >
> > My suggestion is for you to (continue to) follow the PyUSB tutorial:
> >     https://github.com/pyusb/pyusb/blob/master/docs/tutorial.rst
> >
> > Thanks,
> > Jonas
> >
> > >
> > >
> > > What am I missing out?
> >
> >
> > > _______________________________________________
> > > pyusb-users mailing list
> > > pyu...@li...
> > > https://lists.sourceforge.net/lists/listinfo/pyusb-users
> >
> >
> >
> > _______________________________________________
> > pyusb-users mailing list
> > pyu...@li...
> > https://lists.sourceforge.net/lists/listinfo/pyusb-users
> >


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