hey guys,
i got it now, thanks :) The log follows below, it seems that pyusb was
unable to load the propper backend? when installing i did all the steps
in the documentation:
sudo apt-get install python libusb-1.0-0
sudo python setup.py install
Both run fine.
Heres the Log dump:
2015-06-12 16:38:05,805 ERROR:usb.backend.libusb1:Error loading libusb
1.0 backend
Traceback (most recent call last):
File
"/usr/local/lib/python3.2/dist-packages/pyusb-1.0.0b2-py3.2.egg/usb/backend/libusb1.py",
line 880, in get_backend
_setup_prototypes(_lib)
File
"/usr/local/lib/python3.2/dist-packages/pyusb-1.0.0b2-py3.2.egg/usb/backend/libusb1.py",
line 453, in _setup_prototypes
lib.libusb_strerror.argtypes = [c_uint]
File "/usr/lib/python3.2/ctypes/__init__.py", line 366, in __getattr__
func = self.__getitem__(name)
File "/usr/lib/python3.2/ctypes/__init__.py", line 371, in __getitem__
func = self._FuncPtr((name_or_ordinal, self))
AttributeError: /lib/arm-linux-gnueabihf/libusb-1.0.so.0: undefined
symbol: libusb_strerror
2015-06-12 16:38:06,407 ERROR:usb.libloader:'OpenUSB library' could not
be found
2015-06-12 16:38:06,408 ERROR:usb.backend.openusb:Error loading OpenUSB
backend
2015-06-12 16:38:06,439 INFO:usb.core:find(): using backend
"usb.backend.libusb0"
2015-06-12 16:38:06,441
DEBUG:usb.backend.libusb0:_LibUSB.enumerate_devices()
2015-06-12 16:38:06,444
DEBUG:usb.backend.libusb0:_LibUSB.get_device_descriptor(<usb.backend.libusb0._usb_device
object at 0x150dc60>)
2015-06-12 16:38:06,446
DEBUG:usb.backend.libusb0:_LibUSB.get_device_descriptor(<usb.backend.libusb0._usb_device
object at 0x151c4e0>)
2015-06-12 16:38:06,447
DEBUG:usb.backend.libusb0:_LibUSB.get_configuration_descriptor(<usb.backend.libusb0._usb_device
object at 0x151c4e0>, 0)
2015-06-12 16:38:06,449
DEBUG:usb.backend.libusb0:_LibUSB.get_interface_descriptor(<usb.backend.libusb0._usb_device
object at 0x151c4e0>, 0, 0, 0)
2015-06-12 16:38:06,450
DEBUG:usb.backend.libusb0:_LibUSB.get_configuration_descriptor(<usb.backend.libusb0._usb_device
object at 0x151c4e0>, 0)
2015-06-12 16:38:06,452
DEBUG:usb.backend.libusb0:_LibUSB.get_endpoint_descriptor(<usb.backend.libusb0._usb_device
object at 0x151c4e0>, 1, 0, 0, 0)
2015-06-12 16:38:06,453
DEBUG:usb.backend.libusb0:_LibUSB.get_interface_descriptor(<usb.backend.libusb0._usb_device
object at 0x151c4e0>, 0, 0, 0)
2015-06-12 16:38:06,453
DEBUG:usb.backend.libusb0:_LibUSB.get_configuration_descriptor(<usb.backend.libusb0._usb_device
object at 0x151c4e0>, 0)
2015-06-12 16:38:06,455
DEBUG:usb.backend.libusb0:_LibUSB.open_device(<usb.backend.libusb0._usb_device
object at 0x151c4e0>)
2015-06-12 16:38:06,514
DEBUG:usb.backend.libusb0:_LibUSB.close_device(22698048)
And from the console when i run my script:
Traceback (most recent call last):
File "testusb.py", line 65, in <module>
if dev.is_kernel_driver_active(0):
File
"/usr/local/lib/python3.2/dist-packages/pyusb-1.0.0b2-py3.2.egg/usb/core.py",
line 992, in is_kernel_driver_active
interface)
File
"/usr/local/lib/python3.2/dist-packages/pyusb-1.0.0b2-py3.2.egg/usb/backend/__init__.py",
line 363, in is_kernel_driver_active
_not_implemented(self.is_kernel_driver_active)
File
"/usr/local/lib/python3.2/dist-packages/pyusb-1.0.0b2-py3.2.egg/usb/backend/__init__.py",
line 79, in _not_implemented
raise NotImplementedError(func.__name__)
NotImplementedError: is_kernel_driver_active
matt
Am 12.06.2015 um 16:14 schrieb Wander Lairson Costa:
> 2015-06-12 11:15 GMT-03:00 Matthias Grabowski <em...@mailbox.org>:
>> I don't know what you want me to do with
>> export PYUSB_DEBUG=debug
>>
> This is an environment variable to define before running your script.
> You can also define inside your Python code before you import the
> pyusb modules. If you need further details, you might want to give a
> look in the tutorial [1]
>
> [1] https://github.com/walac/pyusb/blob/master/docs/tutorial.rst
>
>> Am 12. Juni 2015 15:36:52 MESZ, schrieb Wander Lairson Costa
>> <wander.lair...@gmail.com>:
>>> 2015-06-12 9:20 GMT-03:00 Matthias Grabowski <em...@mailbox.org>:
>>>> Hello guys,
>>>>
>>>> I'm new to this mailing list, pyusb and Linux in general. So sorry, if
>>>> some
>>>> of my questions may be a little stupid. I know my way around python,
>>>> though.
>>>>
>>>> Anyways, I got a raspberry pi with raspbian installed and I'm writing a
>>>> python script to read data from an air quality sensor that identifies
>>>> itself
>>>> as a HID to the OS. When I try to read or write data to/from the device
>>>> I
>>>> get a USBError:
>>>> Could not claim interface 0: device or resource busy.
>>>>
>>>> I think that happens because the os attaches a kernel driver to the
>>>> device.
>>>> Correct?
>>>>
>>>> In that case I found some code that tries to claim the interface:
>>>> if dev.is_kernel_driver_active (0):
>>>> dev.detach_kernel_driver(0)
>>>>
>>>>
>>>> usb.util.claim_interface (dev, 0)
>>>>
>>>> But there I get a NotImplementedError. Why? Whats wrong and what can I
>>>> do?
>>>
>>>
>>> Hi,
>>>
>>> Could you please run with logs (export PYUSB_DEBUG=debug) and post the
>>> result?
>>>
>> ------------------------------------------------------------------------------
>>
>> _______________________________________________
>> pyusb-users mailing list
>> pyusb-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>>
>
>
------------------------------------------------------------------------------
_______________________________________________
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users
