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Live Q&A - Instrumenting Embedded Applications

Dave Marples - Watch Now - EOC 2023 - Duration: 27:37

Live Q&A - Instrumenting Embedded Applications
Dave Marples
Live Q&A with Dave Marples for the talk titled Instrumenting Embedded Applications
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Score: 0 | 5 months ago | no reply

I really enjoyed this conference!! Hopefully we can have more from you. Thanks a lot

Score: 0 | 1 year ago | 1 reply

Hi Dave,
I found your presentation very informative, very exciting tools with a lot of potential! Making tracing accessible to newcomers/students will be a great investment for the industry.
Looking forward to getting hold of an Orbtrace mini :D (Checking Zyp's store regularly)

Score: 0 | 1 year ago | no reply

Thanks for the kind words. We have a huge distance left to travel, but at least we've started the journey new and the tools we already have available are genuinely useful...hopefully folks will build on those to delivery some nicely differentiated capabilities.

Score: 0 | 1 year ago | 1 reply

Thanks for the presentation. Feels like a dream come true ! Proper unintrusive trace has always been one of the missing tool in my embedded software engineer toolkit. I guess I'll have to try out Orboculum now !
Can you shed a bit more light on which features require ORBTrace, ? and which can work with any debug probe (like J-Link or maybe ST-Link) ? I am currently using Segger RTT over 2 channels on a project : one channel for a CLI interface, another for logging messages. Segger's own tools in this case don't even support displaying properly both channels, I have to go through a custom Python script to exploit that. Maybe I could switch to using SWO and Orbuculum ;)

Score: 0 | 1 year ago | no reply

Hi Nathan,
The SWO link is unidirectional - from the target to the host, but that's generally the important direction of data transfer anyway. JLink and STLink will both terminate SWO and (at least for the JLink case) has been tested with Orbuculum, so you should be good to go.
If you want a proper bidirectional CLI then you can use a SWO channel for the target-to-host and write to a known memory location on the target (anywhere, as long as it's known) and trigger an otherwise unused interrupt by writing to the NVIC to collect the downlink data....obviously that side will need to be done from the debugger, so you can use the control interface of JLink or some gdb magic to do that... Sounds like the perfect job for a few lines of Python :-)

Good luck! Ping us on the discord if you get stuck.

09:29:08	 From  Stephane   to   Dave Marples(Direct Message) : https://embeddedonlineconference.com/speaker/Dave_Marples
09:35:44	 From  Keith J : Love what you guys are doing Dave. I do see a lot of expansion of the parallel output as unlikely as the cost of pins is kind of high.  What you guys are doing with the SWO is awesome.
09:38:18	 From  BobF : Impressive. You highlight FPGA - AMD or INTEL ? PS: Note for amendment Slide 31 - it’s an FGPGA!
09:43:54	 From  Luke Moll : Apologies if this has been covered/answered already - where can the supporting files for the target be found (to send data to the ITM) as used in the examples?
09:44:23	 From  Quantum Leaps : Do the standard eval boards expose all the necessary pins? How about NUCLEO boards, for example?
09:44:23	 From  Jim Norton : Nice scope in the background!
09:44:57	 From  Keith J : So just scanning the site you mentioned, haven't had time to read yet, but did I see that you support Blackmagic probes?  As I have one of those already.
09:50:08	 From  Simon Smith : Mike not working sorry.  I bumped into you at the ARM Hitex conference and found this presentation much easier to follow.  Our HW guys have only fitted a 6 pin connector on our boards (JTDI, NJTRST, JTDO-TSWO, SWCLK, SWDIOP, NRST, 3v3).  Would Orbuculum work on it?  How does it compare with tools such as SystemView or Tracealyzer with a J-Link?
09:50:22	 From  Luke Moll : If you were able to hook into the RTOS context switch and add ITM messages, would the bandwidth (SWO) be suitable to reconstruct the task execution on the PC?
09:50:22	 From  Jim Norton : Why do so many EE's not understand the usefulness of an UART?
09:50:27	 From  Keith J : Thanks Dave. Very interesting project.  Would have never heard about it except for EoC!
09:50:27	 From  Jim Norton : :-)
09:51:14	 From  Luke Moll : Also - what's the overhead for logging compared to a UART or SEGGER RTT?
09:52:10	 From  BobF : IEEE Commag morphed into the IEEE IoT journal ?
09:52:15	 From  Simon Smith : Replying to "Mike not working s..."

Thanks.  Do you have a getting started tutorial?  I looked at Discord, and it was too detailed to understand.
09:53:25	 From  Jim Norton : Hhahaha
09:55:58	 From  Luke Moll : Thanks for the talk + Q&A, will be looking for opportunities to use this at work :)
09:56:14	 From  Jim Norton : Do you believe RISC V will catch up with ARM?
09:57:13	 From  Jim Norton : Thank you very much!
09:58:50	 From  Charles Miller : Thank you Dave.  Great project.