Hanging up jag monitor, UART converter vs dev board USB

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#Hanging up jag monitor, UART converter vs dev board USB

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addshore 06/10/2025 11:31 AM

When hitting Ctrl + C on jag monitor using dev boards (USB pins on ESPs) I have ot hit it multiple times, it seems to hang, I see ^C^C^C^C in the termainl baecause of this and eventaully it exits.
While using uart converters external to deav boards hitting ctrl + c normally instantly exits (desried behaviour)

This is on WSL, and basically i have the issue with /dev/ttyACM* devices, but all /dev/ttyUSB devices are fine.
Any thoughts on what might be up? (Otherwise i might try debugging this myself with a build of jag etc)

floitsch 06/10/2025 11:32 AM

I have encountered this myself, and haven't yet figured it out.
For all the "usual" uart-usb chips the ctrl-c works fine, but with some it doesn't. It's not always the ttyACM* for me, though. Some of these work without issues.

addshore 06/10/2025 11:33 AM

Good to know it isnt just me

floitsch 06/10/2025 11:43 AM

Iirc it happened the most with the built-in USB of the ESP32. But that's a vague memory.

addshore 06/10/2025 01:23 PM

yeah, that sounds about right with my experience too

addshore 06/10/2025 01:40 PM

I find it really hard to reproduce consistently, very annoying

floitsch 06/10/2025 01:42 PM

addshore 06/10/2025 02:37 PM

This seems to dramaticaly improve things for me https://github.com/toitlang/jaguar/pull/623

jag monitor: Ctrl+C shutting down gracefully by addshore · Pull Re...

Make a cancellable context that is passed into the decoder, rather than using that of the cmd.
And handle signals in a separate goroutine explicitly closing the port and waiting for things nicely

addshore 06/11/2025 03:18 PM

@floitsch

did you write that in the right place?

floitsch 06/11/2025 03:21 PM

absolutely not

floitsch 06/11/2025 03:21 PM

Will remove it here, and post it again in general.

11 messages in total