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
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