I've seen a few posts here about using a PICKIT to program / debug ATSAM parts with various problems. I am currently receiving the "Error: No device detected. Error 4109" message and tried everything I can from those posts to no avail.
I've been monitoring the SWD lines and see some activity on SWDIO and SWCLK but none at all on RESET - not sure if this is a cause or symptom of the problem? I'm using a SAMC21N Xplained dev board so am ruling out that it's some hardware mistake. I am using the connections found here; not using SWO as this is not on the dev board nor available for this part. As advised in another post I added a 3k3 pull-up to RESET - it did pull it up to 3.3V from about 2.8 where it was sitting without the pull-up. When I connect using the dev board's own EDGB programmer / debugger I do see the reset line move, and the other 2 signals too, as expected. I have tried with 2 PICKITs and the same result for each.
Can anyone shed any light on what might be happening?