Error: unable to find a matching CMSIS-DAP device about pico-debug HOT 4 CLOSED

If you add a "-d" to the openocd arguments:

openocd -d -f board/pico-debug.cfg

there will be additional openocd debugging information that might provide some clues as to what is awry. I would suspect that it has nothing to do with pico-debug per se and would happen with any CMSIS-DAP adapter.

One possibility is that you haven't yet given permission to access said USB device. I'm assuming that you are familiar with adding udev rules, and here's a udev rule for any and all CMSIS-DAP adapters (including pico-debug). You'll have to rename it from 98-CMSIS-DAP.rules.txt to 98-CMSIS-DAP.rules (since github wouldn't let me upload it as a .rules):

98-CMSIS-DAP.rules.txt

from pico-debug.

Thanks! I added the udev rules and tried with -d. There was a permissions issue so I ran it again as root. Logs attached:

not-root.log.txt
root.log.txt

I don't have a hardware debug setup wired but it's looking like I'll need to do so if I want to do any debugging. Troubleshooting openocd is a tad above my pay grade when the hardware cost is in the $25US range. :-)

from pico-debug.

It looks to be similar, if not the same, as another user's prior experience (OS has libhidapi missing or not implemented). Take a look at #22 and see what he did to solve his problem.

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Thanks! I'm getting a second reTerminal this week so I'll try hacking the kernel on one of them to see if I can save the money I would have spent on a soldering iron.

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