Hi,
I am a user of pyOCD, and I am having an issue related to pyusb which
is what the former uses for talking to the USB device. The situation
is that I need to use pyOCD through an eclipse plugin. Eclipse
launches pyocd-gdbserver and normal user. But it will only work if
launched as root.
My question is, how can I make pysb do its job without requiring root
permissions? Here is the error I get when launching pyocd-gdbserver as
normal user. The last lines suggests its pyusb having issues:
uncaught exception: The device has no langid
Traceback (most recent call last):
File "build/bdist.linux-x86_64/egg/pyOCD/tools/gdb_server.py", line
262, in run
frequency=self.args.frequency)
File "build/bdist.linux-x86_64/egg/pyOCD/board/mbed_board.py", line
210, in chooseBoard
target_override, frequency)
File "build/bdist.linux-x86_64/egg/pyOCD/board/mbed_board.py", line
182, in getAllConnectedBoards
connected_daps = dap_class.get_connected_devices()
File "build/bdist.linux-x86_64/egg/pyOCD/pyDAPAccess/dap_access_cmsis_dap.py",
line 352, in get_connected_devices
all_interfaces = _get_interfaces()
File "build/bdist.linux-x86_64/egg/pyOCD/pyDAPAccess/dap_access_cmsis_dap.py",
line 44, in _get_interfaces
return INTERFACE[usb_backend].getAllConnectedInterface()
File
"build/bdist.linux-x86_64/egg/pyOCD/pyDAPAccess/interface/pyusb_backend.py",
line 88, in getAllConnectedInterface
product = board.product
File "/usr/lib/python2.7/site-packages/usb/core.py", line 841, in product
self._product = util.get_string(self, self.iProduct)
File "/usr/lib/python2.7/site-packages/usb/util.py", line 314, in get_string
raise ValueError("The device has no langid")
ValueError: The device has no langid
Please let me know if there are any workarounds to make pyusb work
without requiring root privilege.
--
Thanks and Regards,
Aurabindo J
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