Hello Kevin, What OS are you using?
Wander 2010/4/10 Kevin Kilroy <kevkil...@googlemail.com>: > Hi, > > I have an HID device that I am trying to read from, but I am receiving the > following error: > > usb.core.USBError: Access denied (insufficient permissions) > > Here is a snippet from my code: > > import usb > import usb.core > > myVendorId = 53769 > myProductId = 5377 > dev = usb.core.find(idVendor=myVendorId, idProduct=myProductId) > dev.set_configuration() > test = dev.read(0x81,8) > print "res: ",test > > The output from running usbenum.py is: > > Device: > Device class: 0 > Device sub class: 0 > Device protocol: 0 > Max packet size: 8 > idVendor: 53769 (0xd209) > idProduct: 5377 (0x1501) > Device Version: 25 > Configuration: 1 > Total length: 109 > selfPowered: 0 > remoteWakeup: 0 > maxPower: 1000 > Interface: 0 > Alternate Setting: 0 > Interface class: 3 > Interface sub class: 0 > Interface protocol: 0 > Endpoint: 0x81 > Type: 3 > Max packet size: 8 > Interval: 10 > Alternate Setting: 0 > Interface class: 3 > Interface sub class: 0 > Interface protocol: 0 > Endpoint: 0x82 > Type: 3 > Max packet size: 20 > Interval: 10 > Alternate Setting: 0 > Interface class: 3 > Interface sub class: 0 > Interface protocol: 0 > Endpoint: 0x83 > Type: 3 > Max packet size: 16 > Interval: 10 > Alternate Setting: 0 > Interface class: 3 > Interface sub class: 1 > Interface protocol: 2 > Endpoint: 0x84 > Type: 3 > Max packet size: 8 > Interval: 10 > > > I have tried reading from the other endpoints but get the following error: > > File "/Library/Python/2.6/site-packages/usb/core.py", line 163, in > get_endpoint_type > type = util.endpoint_type(e.bmAttributes) > AttributeError: 'NoneType' object has no attribute 'bmAttributes' > > I'm a newbie to usb but I'm learning & reading the USB Complete book, so I'd > really appreciate it if somebody could help me to retrieve data from my USB > HID device. > > Thanks in advance, > > Kevin > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > pyusb-users mailing list > pyusb-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pyusb-users > > ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
