when verbose, print /dev/ files that are being attempted

[gmabey]

Hello! this looks like a pretty simple but extremely useful helper for those of us trying to get started using pyedbg!

My trouble is that I'm struggling to figure out which device file I need to change permissions on in order to get pykitinfo to succeed. Would you consider adding a bit more info to the -v debug mode that informs the user which devices it's trying to access? I have a PIC Kit 4 attached, and I'm getting this output:

glen@celeron:~$ pykitinfo -v debug
Looking for Microchip kits...
pykitinfo.pykitinfo - DEBUG - Looking for xEDBG kits
pykitinfo.pykitinfo - DEBUG - Looking for PKoB/PICkit 3 kits
pykitinfo.gen4_detect - DEBUG - Looking for Gen4 kits
pykitinfo.pykitinfo_cli - ERROR - Operation failed with ValueError: The device has no langid (permission issue, no string descriptors supported or device error)
pykitinfo.pykitinfo_cli - DEBUG - The device has no langid (permission issue, no string descriptors supported or device error)
Traceback (most recent call last):
  File "/home/glen/.local/lib/python3.10/site-packages/pykitinfo/pykitinfo_cli.py", line 131, in main
    return pykitinfo.pykitinfo(arguments)
  File "/home/glen/.local/lib/python3.10/site-packages/pykitinfo/pykitinfo.py", line 38, in pykitinfo
    kit_list = detect_all_kits()
  File "/home/glen/.local/lib/python3.10/site-packages/pykitinfo/pykitinfo.py", line 65, in detect_all_kits
    kit_list += detect_gen4_tools()
  File "/home/glen/.local/lib/python3.10/site-packages/pykitinfo/gen4_detect.py", line 116, in detect_gen4_tools
    tools = list_gen4_libusb_tools()
  File "/home/glen/.local/lib/python3.10/site-packages/pykitinfo/gen4_detect.py", line 72, in list_gen4_libusb_tools
    serial_number = device.serial_number
  File "/home/glen/.local/lib/python3.10/site-packages/usb/core.py", line 864, in serial_number
    self._serial_number = util.get_string(self, self.iSerialNumber)
  File "/home/glen/.local/lib/python3.10/site-packages/usb/util.py", line 313, in get_string
    raise ValueError("The device has no langid"
ValueError: The device has no langid (permission issue, no string descriptors supported or device error)

Thank you!
Glen

[gmabey]

I got the Bus ID and the Device ID from lsusb (in Linux, which was Bus 001 and Device 002) as well as the vendor and product ids, 04d8:9012.

glen@celeron:~$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 8087:0a2a Intel Corp. Bluetooth wireless interface
Bus 001 Device 002: ID 04d8:9012 Microchip Technology, Inc. PICkit4
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Those map directly to the device file at /dev/bus/usb/001/002 which indeed was not accessible by my non-root user.
So, then I modified the values indicated by the pyedbg project so that there now exists in /etc/udev/rules.d/80-pyedbglib.rules a line that reads:

SUBSYSTEM=="usb", ATTRS{idVendor}=="04d8", ATTRS{idProduct}=="9012", MODE="0666"

Then when I rebooted (yes, there should be a better way than that), the permissions were now:

glen@celeron:~$ ll /dev/bus/usb/001/002 
crw-rw-rw- 1 root root 189, 1 Dec 18 08:01 /dev/bus/usb/001/002

and pykitinfo worked:

glen@celeron:~$ pykitinfo
Looking for Microchip kits...
Compatible kits detected: 1
Kit BUR202974199: 'MPLAB® PICkit™4' (N/A) on N/A