I am working with python in Ubuntu 11.10. I'm able to detect a USB device,
access its properties etc. Now I want to establish USB communication. As
given in the pyusb tutorial webpage, I gave a command
pingu = usb.core.find(idVendor = 0x04D8, idProduct = 0xFEAA) #this is
working fine now, and then....
pingu.set_configuration() #this gives the following error
Traceback (most recent call last):
File "testui1007.py", line 78, in startHandler
pingu.set_configuration()
File "/usr/local/lib/python2.7/
dist-packages/usb/core.py", line 547, in set_configuration
self._ctx.managed_set_configuration(self, configuration)
File "/usr/local/lib/python2.7/dist-packages/usb/core.py", line 92, in
managed_set_configuration
self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb10.py",
line 503, in set_configuration
_check(_lib.libusb_set_configuration(dev_handle, config_value))
File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb10.py",
line 403, in _check
raise USBError(_str_error[ret], ret, _libusb_errno[ret])
usb.core.USBError: [Errno None] Unknown error
I am logged in as root, so authentication cannot be an issue right?
Please give some idea why this is happening? I tried making a debug log
file, but the log file doesn't get created.
--
Regards,
Debapratim Ghosh
IIT Bombay
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