Alan Jhonn Aguiar Schwyn <alanjas@...> writes:

> 
> 
> >usb.core.USB Error: [Errno 13] Access denied (insufficient permissions)
> Classic problems of permissions. Check your UDEV rule.
> Do in a console:
> 
> lsusb
> 
> You see the device? And with:
> 
> sudo lsusb
> 
> 
> 
> Date: Wed, 10 Apr 2013 14:49:02 -0400From: jragin-
Re5JQEeQqe8AvxtiuMwx3w@public.gmane.orgTo: pyusb-users-
5nwgofrqmnerv+lv9mx5urnah6klm...@public.gmane.org.netSubject: [pyusb-
users] Issue reading interrrupt endpointsI have a Logitech NuLooq 3D mouse 
that I would like to get to work on my Raspberry Pi.  There are drivers 
(spacenav ) available for Linux that were supposed to work, but I wasn’t 
able to get them to work on my Raspberry Pi.  I gave up on getting them 
to work after a week, so right now I am trying to use Python to interface 
with the NuLooq.  Since I am just starting to learn Python, I am doing all 
my development in PyDev for Eclipse on my Mac. I have the libusb and pyusb 
modules installed. And everything is working fine.  In fact I am able to 
send a control transfer to turn on all the LEDS of the NuLooq, however, I 
am not able to read on the end point.  Can someone help me out, what am I 
doing wrong?  Thanks in advance. 
>  Endpoint 
Descriptor:bLength                                  7bDescriptorType       
              5bEndpointAddress            0x81  EP  1  
INbmAttributes                           3     Transfer 
Type                        Interrupt
>      Synch Type                           None     Usage 
Type                           Data     wMaxPacketSize     0x0008  1x  
8   bytes     bInterval                          10Please see attached 
files.  I get the following errors when I run the python script.
>  Traceback (most recent call last):  
File "/Users/JRMN/Documents/Python/NotWorking.py", line 21, in <module>    
data = device.read(endpoint.bEndpointAddress,endpoint.wMaxPacketSize)  
File "/usr/local/lib/python3.3/site-packages/usb/core.py", line 654, in 
read
>     self._ctx.managed_claim_interface(self, intf)  
File "/usr/local/lib/python3.3/site-packages/usb/core.py", line 112, in 
managed_claim_interface    self.backend.claim_interface(self.handle, i)  
File "/usr/local/lib/python3.3/site-packages/usb/backend/libusb1.py", line 
519, in claim_interface
>     _check(_lib.libusb_claim_interface(dev_handle, intf))  
File "/usr/local/lib/python3.3/site-packages/usb/backend/libusb1.py", line 
403, in _check    raise USBError(_str_error[ret], ret, _libusb_errno[ret])
> usb.core.USBError: [Errno 13] Access denied (insufficient permissions)
> 
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building
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I get -bash: lsusb: command not found.  But I think that's because I am on 
a Mac, right?


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