2011/10/20 Mac Ryan <quasipe...@gmail.com>: > Hello, > > I'm running pyusb-1.0.0-a1 (installed as per README file) on a > fresh installation of ubuntu 11.10 64 bit (kernel version > 3.0.0-12-generic) on which both libusb 0.1-4 [2:0.1.12-18] an libusb > 1.0-0 [2:1.0.8-4] are installed. > > I was trying to follow the tutorial but I quickly got stucked > on the following problem: > > >>> import usb.core > >>> import usb.util > >>> dev = usb.core.find(idVendor=0x04D8, idProduct=0x0043) > >>> dev > <usb.core.Device object at 0x7f808bda2a50> > >>> import sys > >>> for cfg in dev: > ... sys.stdout.write(str(cfg.bConfigurationValue) + '\n') > ... > 1 > >>> dev.set_configuration() #the same for dev.set_configuration(1) > libusb couldn't open USB > device /dev/bus/usb/004/003: Permission denied. libusb requires > write access to USB device nodes. Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File "/usr/local/lib/python2.7/dist-packages/usb/core.py", line > 530, in set_configuration self._ctx.managed_set_configuration(self, > configuration) File > "/usr/local/lib/python2.7/dist-packages/usb/core.py", line 91, in > managed_set_configuration self.managed_open() File > "/usr/local/lib/python2.7/dist-packages/usb/core.py", line 70, in > managed_open self.handle = self.backend.open_device(self.dev) File > "/usr/local/lib/python2.7/dist-packages/usb/_debug.py", line 52, in > do_trace return f(*args, **named_args) File > "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb10.py", > line 446, in open_device _check(_lib.libusb_open(dev.devid, > byref(handle))) File > "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb10.py", > line 357, in _check raise USBError(_str_error[retval.value]) > usb.core.USBError: Access denied (insufficient permissions) >>> > > A quick google search points to issues linked to the MacOS kernel... > but the fact is that I am running on GNU/linux. What am I doing wrong? > > Thanks in advance for your help and support! :) >
Try to run the script with sudo. -- Best Regards, Wander Lairson Costa https://github.com/walac https://gitorious.org/~walac ------------------------------------------------------------------------------ The demand for IT networking professionals continues to grow, and the demand for specialized networking skills is growing even more rapidly. Take a complimentary Learning@Ciosco Self-Assessment and learn about Cisco certifications, training, and career opportunities. http://p.sf.net/sfu/cisco-dev2dev _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
