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knurling-rs / defmt

Efficient, deferred formatting for logging on embedded systems
https://defmt.ferrous-systems.com/
Apache License 2.0
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View defmt_rtt output in J-Link viewer #826

Open pnchatterji opened 6 months ago

pnchatterji commented 6 months ago

Hello, I am using defmt_rtt in an Embassy application. In order to view output messages using probe_rs, I was forced to change the jlink usb driver. I had previously attempted to view the output on J-Link viewer, but I was getting junk, even after setting encoding to raw. However, now my J-link viewer is unusable. Probably I would need to reinstall it. Is there any way to see the defmt_rtt output in j-link viewer, thus avoiding having to replace the USB driver? I need the j-link viewer for non-rust embedded applications, so I can't keep installing and reinstalling the USB drivers.

thanks regards pnc

jonathanpallant commented 5 months ago

I think you would need to talk to SEGGER about adding support for the defmt protocol to their J-Link tool, either directly or by piping the RTT byte stream through the defmt-print binary.