Support `defmt`

Question

Support `defmt`

Opened this issue 2 years ago · 5 comments

I will be transitioning from defmt-rtt to using the USB Jtag peripheral as my defmt printer since I cannot use direct-boot.

Would it be possible to add defmt decoding support to espmonitor? To be clear, I'm suggesting that there is a commandline flag or something that treats the serial output from the device as being in defmt encoding.

Answer 1 · 2022-11-20T06:24:08.000Z

I've never heard of defmt before, so not sure I'm too interested in doing this, but I'd be happy to accept a patch if you're feeling up to implementing it.

Answer 2 · 2022-11-20T06:56:54.000Z

For some additional context: https://github.com/knurling-rs/defmt and https://defmt.ferrous-systems.com/introduction.html

Answer 3 · 2022-11-20T06:57:21.000Z

Would this issue be better in the espflash repo by any chance? That tool also does monitoring.

Answer 4 · 2022-11-20T07:44:29.000Z

I believe espflash uses espmonitor as a library to do its monitoring.

Answer 5 · 2022-11-20T07:46:47.000Z

I believe espflash uses espmonitor as a library to do its monitoring.

Hmm, actually that seems not to be the case; the developer over there asked me to make some changes so they could do that, but I guess they never got around to it.

Personally I'd rather have all the good stuff in espmonitor; my opinion is that monitoring is a "distraction" for espflash and it should defer to espmonitor for that. But up to you where you'd rather put your time, if you end up deciding to implement it yourself.