Re: [pyusb-users] Fwd:

[Арам А. <abo...@gm...>]

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)

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
>
>
>
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