Linux - USB connection issue - cw.scope()

Embedded Security ChipWhisperer Software
1

Initial install performed and failed many times. I am seeing errors on the hardware test that calls “generic_setup.py” in the jupyter notebook looking for the CW on the usb port… so went looking further, since I’m not seeing any helpful feedback for a newbie.

Using IPython3 to debug … testing ‘cw.scope’ seems to throw the following while CW is plugged in:

Attribute Error: ‘USBDeviceHandle’ object has not attribut 'getSerialNumber’

Using IPython3 to debug … seems to throw the following while CW is not plugged in:

OSError: Could not find ChipWhisperer. Is it connected?

Anyone have any ideas on this one?

2

Hi,

Can you post the stack trace of the error?

Alex

3

I cannot at this time. Is there something specific you’re looking for in the trace?

4

Yes, I’d like to see what line of code raised the error.

5

I’m typing it instead of copy/paste, so disregard any syntax errors while we look at the error:

At the end of the trace:

Attribute Error: ‘USBDeviceHandle’ object has no attribute ‘getSerialNumber’
line 242 of naeusb.py in open (self, serial_number, idProduct, connect_to_first)
–> return [data & 0xff, (data >> 8) & 0xff, (data >> 16) & 0xff, (data >> 24) & 0xff]

6

Hm, looking at the source code for libusb1, that method definitely exists for USBDeviceHandle. Can you try pip uninstalling libusb1, then reinstalling it?

Alex