08:52 <rigid> so it turns out that the issue I pulled out my jlink for, was a simple voltage glitch since my digital glass slide ruler seems to unexpectetly needs more current at some point and the USB port couldn't provide it making the MCU to brown out.

08:53 <rigid> not so fun fact: "stable power supply" is basically the first lesson to learn and it keeps haunting me again and again :)

11:26 <PaulFertser> rigid: wow how much current is that actually?

11:27 <PaulFertser> rigid: thanks for the update btw!

11:27 <PaulFertser> rigid: and did you manage to step by step the code?

11:27 <PaulFertser> digital glass slider ruler?!

11:29 <rigid> yeah, i guess they are called "digital linear scale" in english. Used for precise position feedback: https://www.youtube.com/watch?v=LyS_wd5C0y0

11:30 <rigid> PaulFertser: not sure how much, but obviously my laptop couldn't provide it. Constant current was about 200mA but ultra short peaks might have been higher

11:31 <rigid> yeah, I could but since the code was using the PIO co-processor it didn't help. I'm not 100% sure but I _think_ my crash resulted from an unhandled brown-out interrupt. Not sure. Didn't investigate further after I found out that it doesn't happen with external 5V power supply.

11:45 <PaulFertser> https://en.wikipedia.org/wiki/Slide_rule is for calculations that's why I got surprised :)

13:28 <rigid> lol, well... digital version would be a calculator I guess :-P