Feature idea : add option to record received time of ITM message

[JOE1994]

STM32CubeIDE has a feature that shows the received time of an ITM data,
and it seems to be provide a convenient way for profiling embedded apps.

I thought this feature could be useful when added to the itm-dump tool.
I'm not an expert with ITM or embedded stuff, so I first wanted to ask whether this feature would fit well with the itm-dump tool.
I can try implementing the feature in the near future.

Reference

• http://blog.atollic.com/cortex-m-debugging-measure-execution-time-using-swv/itm

Thank you for reading 🦀

[JOE1994]

I've come to think that rather than implementing this functionality on the itmdump side, it might be better to create an API like iprint_with_timestamp in the cortex_m crate.. I'll close this issue..

[ryankurte]

sorry for the delay. this seems like a super interesting idea! would definitely come in handy for some timing-specific debugging i have been doing. i haven't used ITM much but would expect this to be a combination of support for receiving timestamps in itmdump as well as itm client extensions.

as to where to put this i would be inclined to fork itmdump for the receiver side to support receiving timestamps, and maybe look at feature for itm_logger or cortex-m-log to support client-side-timestamping? (disclaimer: i have not used either of itm_logger or corex-m-log they just seem roughly in line with your goals). whatever you do manage, keep us posted!

[therealprof]

@JOE1994 Have you looked into probe.rs and its RTT feature?

[JOE1994]

@JOE1994 Have you looked into probe.rs and its RTT feature?

I've never tried probe.rs before! (I've been using gdb & openocd for flashing & debugging)

Thank you for the pointers! I'll take a good look at it 😸