Wander Lairson Costa wrote:
> This is rather strange, some control requests work, some don't.
>
> Could you please activate the PYUSB_DEBUG=debug and LIBUSB_DEBUG=3
> environment variables and send the output?
Thank you for your answer. Here is the output:
2013-11-30 19:07:03,301 DEBUG:usb.backend.libusb1:_LibUSB.__init__(<CDLL
'libusb-1.0.so.0', handle 90ab628 at b729948c>)
2013-11-30 19:07:03,301 INFO:usb.core:find(): using backend
"usb.backend.libusb1"
2013-11-30 19:07:03,302
DEBUG:usb.backend.libusb1:_LibUSB.enumerate_devices()
2013-11-30 19:07:03,302
DEBUG:usb.backend.libusb1:_LibUSB.get_device_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>)
2013-11-30 19:07:03,303
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0)
2013-11-30 19:07:03,303
DEBUG:usb.backend.libusb1:_LibUSB.open_device(<usb.backend.libusb1._Device
object at 0xb7240acc>)
2013-11-30 19:07:03,303
DEBUG:usb.backend.libusb1:_LibUSB.set_configuration(<usb.backend.libusb1._DeviceHandle
object at 0xb7240aac>, 1)
2013-11-30 19:07:03,303
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0)
2013-11-30 19:07:03,303
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0)
2013-11-30 19:07:03,303
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0, 0, 0)
2013-11-30 19:07:03,303
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0)
2013-11-30 19:07:03,303
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0, 1, 0)
2013-11-30 19:07:03,304
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0)
2013-11-30 19:07:03,304
DEBUG:usb.backend.libusb1:_LibUSB.claim_interface(<usb.backend.libusb1._DeviceHandle
object at 0xb7240aac>, 0)
2013-11-30 19:07:03,304
DEBUG:usb.backend.libusb1:_LibUSB.set_interface_altsetting(<usb.backend.libusb1._DeviceHandle
object at 0xb7240aac>, 0, 1)
2013-11-30 19:07:03,304
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0)
2013-11-30 19:07:03,304
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0, 1, 0)
2013-11-30 19:07:03,304
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0)
2013-11-30 19:07:03,304
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0, 1, 0)
2013-11-30 19:07:03,304
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0)
2013-11-30 19:07:03,304
DEBUG:usb.backend.libusb1:_LibUSB.get_endpoint_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0, 0, 1, 0)
2013-11-30 19:07:03,305
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0, 1, 0)
2013-11-30 19:07:03,305
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0)
2013-11-30 19:07:03,305
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0, 1, 0)
2013-11-30 19:07:03,305
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0)
2013-11-30 19:07:03,305
DEBUG:usb.backend.libusb1:_LibUSB.get_endpoint_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 1, 0, 1, 0)
2013-11-30 19:07:03,305
DEBUG:usb.backend.libusb1:_LibUSB.get_interface_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0, 1, 0)
2013-11-30 19:07:03,305
DEBUG:usb.backend.libusb1:_LibUSB.get_configuration_descriptor(<usb.backend.libusb1._Device
object at 0xb7240acc>, 0)
2013-11-30 19:07:03,305
DEBUG:usb.backend.libusb1:_LibUSB.ctrl_transfer(<usb.backend.libusb1._DeviceHandle
object at 0xb7240aac>, 161, 0, 0, 0, 256, 1000)
2013-11-30 19:07:03,305
DEBUG:usb.backend.libusb1:_LibUSB.ctrl_transfer(<usb.backend.libusb1._DeviceHandle
object at 0xb7240aac>, 161, 1, 0, 0, 1, 1000)
Traceback (most recent call last):
File "test.py", line 21, in <module>
dev.ctrl_transfer(161, 1, data_or_wLength = 1) # pipe error
File
"/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/core.py",
line 711, in ctrl_transfer
self.__get_timeout(timeout)
File
"/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/_debug.py",
line 60, in do_trace
return f(*args, **named_args)
File
"/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/backend/libusb1.py",
line 836, in ctrl_transfer
timeout))
File
"/usr/local/lib/python2.7/dist-packages/pyusb-1.0.0b1-py2.7.egg/usb/backend/libusb1.py",
line 571, in _check
raise USBError(_str_error[ret], ret, _libusb_errno[ret])
usb.core.USBError: [Errno 32] Pipe error
2013-11-30 19:07:03,308
DEBUG:usb.backend.libusb1:_LibUSB.release_interface(<usb.backend.libusb1._DeviceHandle
object at 0xb7240aac>, 0)
2013-11-30 19:07:03,309
DEBUG:usb.backend.libusb1:_LibUSB.close_device(<usb.backend.libusb1._DeviceHandle
object at 0xb7240aac>)
2013-11-30 19:07:03,309 DEBUG:usb.backend.libusb1:_LibUSB.__del__()
<cut>
Regards
Perf
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