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From: Matthias G. <em...@ma...> - 2015-06-12 12:15:59
|
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?
Matt |
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From: Wander L. C. <wan...@gm...> - 2015-06-12 13:37:39
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2015-06-12 9:20 GMT-03:00 Matthias Grabowski <em...@ma...>: > 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? -- Best Regards, Wander Lairson Costa |
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From: Matthias G. <em...@ma...> - 2015-06-12 14:10:57
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I don't know what you want me to do with export PYUSB_DEBUG=debug Am 12. Juni 2015 15:36:52 MESZ, schrieb Wander Lairson Costa <wan...@gm...>: >2015-06-12 9:20 GMT-03:00 Matthias Grabowski <em...@ma...>: >> 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? > > >-- >Best Regards, >Wander Lairson Costa > >------------------------------------------------------------------------------ >_______________________________________________ >pyusb-users mailing list >pyu...@li... >https://lists.sourceforge.net/lists/listinfo/pyusb-users |
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From: Wander L. C. <wan...@gm...> - 2015-06-12 14:15:42
|
2015-06-12 11:15 GMT-03:00 Matthias Grabowski <em...@ma...>: > 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 > <wan...@gm...>: >> >> 2015-06-12 9:20 GMT-03:00 Matthias Grabowski <em...@ma...>: >>> >>> 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 > pyu...@li... > https://lists.sourceforge.net/lists/listinfo/pyusb-users > -- Best Regards, Wander Lairson Costa |
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From: Matthias G. <em...@ma...> - 2015-06-13 11:33:28
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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...@ma...>:
>> 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
>> <wan...@gm...>:
>>> 2015-06-12 9:20 GMT-03:00 Matthias Grabowski <em...@ma...>:
>>>> 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
>> pyu...@li...
>> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>>
>
>
|
|
From: Wander L. C. <wan...@gm...> - 2015-06-14 00:55:10
|
2015-06-13 8:33 GMT-03:00 Matthias Grabowski <em...@ma...>: > hey guys, > Hi, so what's going on here is a chain of unfortunate events. > 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 So, you have a pretty old libusb 1.0 version installed, which does not implement libusb_strerror yet. I solved this issue recently in PyUSB, either upgrading libusb 1.0 or using git version of PyUSB must solve the problem > 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" But you have libusb 0.1 installed, so PyUSB goes for it > 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 > But libusb 0.1 does not implement is_kernel_driver_active function... > matt > -- Best Regards, Wander Lairson Costa |
|
From: Matthias G. <em...@ma...> - 2015-06-14 11:21:36
|
Hey,
my version that i downloaded from sourceforge seems to have indeed been
quite old. I got the latest version from github now. After some more
googling, im now using this code:
import usb.backend.libusb1 as libusb
backend = libusb.get_backend(find_library=lambda x:
"usr/lib/arm-linux-gnueabihf/libusb-1.0.so")
dev = usb.core.find(idVendor=VENDOR, idProduct = PRODUCT, backend=backend)
This works, the kernel_driver functions dont throw errors anymore. I can
even send data to my device and get a valid return code. However, when
reading from the device, there still seem to be problems.
ret = endpoint_out.write(message, 1000)
print(ret)
ret = endpoint_in.read(16)
On that last line i (again) get a undefined symbol error:
AttributeError: /usr/lib/arm-linux-gnueabihf/libusb-1.0.so: undefined
symbol: libusb_strerror
Whats happening now?
Heres the log file:
2015-06-14 13:14:00,122 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: /usr/lib/arm-linux-gnueabihf/libusb-1.0.so: undefined
symbol: libusb_strerror
2015-06-14 13:14:00,166 DEBUG:usb.backend.libusb1:_LibUSB.__init__(<CDLL
'/usr/lib/arm-linux-gnueabihf/libusb-1.0.so', handle 10bb3c8 at 769023f0>)
2015-06-14 13:14:00,169 INFO:usb.core:find(): using backend
"usb.backend.libusb1"
2015-06-14 13:14:00,170
DEBUG:usb.backend.libusb1:_LibUSB.enumerate_devices()
2015-06-14 13:14:00,176
DEBUG:usb.backend.libusb1:_LibUSB.get_device_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>)
2015-06-14 13:14:00,178
DEBUG:usb.backend.libusb1:_LibUSB.get_device_descriptor(<usb.backend.libusb1._Device
object at 0x766e44d0>)
2015-06-14 13:14:00,181
DEBUG:usb.backend.libusb1:_LibUSB.get_device_descriptor(<usb.backend.libusb1._Device
object at 0x766e4450>)
2015-06-14 13:14:00,183
DEBUG:usb.backend.libusb1:_LibUSB.get_device_descriptor(<usb.backend.libusb1._Device
object at 0x766e44f0>)
2015-06-14 13:14:00,185
DEBUG:usb.backend.libusb1:_LibUSB.get_device_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>)
2015-06-14 13:14:00,189
DEBUG:usb.backend.libusb1:_LibUSB.open_device(<usb.backend.libusb1._Device
object at 0x766e43f0>)
2015-06-14 13:14:00,190
DEBUG:usb.backend.libusb1:_LibUSB.is_kernel_driver_active(<usb.backend.libusb1._DeviceHandle
object at 0x769d8d50>, 0)
2015-06-14 13:14:00,192
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,194
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0)
2015-06-14 13:14:00,196
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,198
DEBUG:usb.backend.libusb1:_LibUSB.get_endpoint_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0, 0)
2015-06-14 13:14:00,200
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0)
2015-06-14 13:14:00,201
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,203
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,205
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0)
2015-06-14 13:14:00,206
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,208
DEBUG:usb.backend.libusb1:_LibUSB.get_endpoint_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 1, 0, 0, 0)
2015-06-14 13:14:00,209
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0)
2015-06-14 13:14:00,210
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,212
DEBUG:usb.backend.libusb1:_LibUSB.claim_interface(<usb.backend.libusb1._DeviceHandle
object at 0x769d8d50>, 0)
2015-06-14 13:14:00,214
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration(<usb.backend.libusb1._DeviceHandle
object at 0x769d8d50>)
2015-06-14 13:14:00,217
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,220
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0)
2015-06-14 13:14:00,222
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,226
DEBUG:usb.backend.libusb1:_LibUSB.get_endpoint_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0, 0)
2015-06-14 13:14:00,228
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0)
2015-06-14 13:14:00,230
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,233
DEBUG:usb.backend.libusb1:_LibUSB.get_endpoint_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 1, 0, 0, 0)
2015-06-14 13:14:00,235
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0)
2015-06-14 13:14:00,236
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,239
DEBUG:usb.backend.libusb1:_LibUSB.intr_write(<usb.backend.libusb1._DeviceHandle
object at 0x769d8d50>, 2, 0, array('B', [40, 68, 42, 54, 52, 10, 32, 32,
32, 32, 32, 32, 32, 32, 32, 32]), 1000)
2015-06-14 13:14:00,498
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,500
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0)
2015-06-14 13:14:00,502
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,504
DEBUG:usb.backend.libusb1:_LibUSB.get_endpoint_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0, 0)
2015-06-14 13:14:00,505
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0, 0, 0)
2015-06-14 13:14:00,506
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0x766e43f0>, 0)
2015-06-14 13:14:00,508
DEBUG:usb.backend.libusb1:_LibUSB.intr_read(<usb.backend.libusb1._DeviceHandle
object at 0x769d8d50>, 129, 0, array('B', [0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0]), 1000)
Am 14.06.2015 um 02:54 schrieb Wander Lairson Costa:
> 2015-06-13 8:33 GMT-03:00 Matthias Grabowski <em...@ma...>:
>> hey guys,
>>
> Hi, so what's going on here is a chain of unfortunate events.
>
>> 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
> So, you have a pretty old libusb 1.0 version installed, which does not
> implement libusb_strerror yet. I solved this issue recently in PyUSB,
> either upgrading libusb 1.0 or using git version of PyUSB must solve
> the problem
>
>> 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"
> But you have libusb 0.1 installed, so PyUSB goes for it
>
>> 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
>>
> But libusb 0.1 does not implement is_kernel_driver_active function...
>
>> matt
>>
>
|
|
From: Xiaofan C. <xia...@gm...> - 2015-06-15 03:34:59
|
On Sun, Jun 14, 2015 at 7:21 PM, Matthias Grabowski <em...@ma...> wrote: > Hey, > > my version that i downloaded from sourceforge seems to have indeed been > quite old. I got the latest version from github now. After some more > googling, im now using this code: > > On that last line i (again) get a undefined symbol error: > AttributeError: /usr/lib/arm-linux-gnueabihf/libusb-1.0.so: undefined > symbol: libusb_strerror > > Whats happening now? As mentioned before, your libusb is old. Please download latest version of libusb (1.0.19) from Sourceforge. http://libusb.info/ http://sourceforge.net/projects/libusb/ -- Xiaofan |
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