VS Arduino - Hardware Debugging ESP32-S3 core using integrated JTAG over USB

Sep 21^st, 2024 at 3:21am (UTC)

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VS Arduino › Visual Micro › Hardware Debugging (GDB, GDB WiFi, GDB Stub) › Hardware Debugging ESP32-S3 core using integrated JTAG over USB

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Hardware Debugging ESP32-S3 core using integrated JTAG over USB (Read 834 times)

StephenB Newbies Offline Posts: 5 Joined: Feb 14^th, 2024	Hardware Debugging ESP32-S3 core using integrated JTAG over USB Feb 14^th, 2024 at 5:42pm	Print Post
	I can get the debugger to start and I can see variables etc in the Auto window etc. However when I attempt to step into core functions it throws an error. "unknown Stopping event" Optimisation is off. The attached screenshot shows tthe configuration. I have a boards.txt file.

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Simon@Visual Micro Administrator Offline Posts: 2351 Joined: Feb 13^th, 2019	Re: Hardware Debugging ESP32-S3 core using integrated JTAG over USB Reply #1 - Feb 15^th, 2024 at 1:37pm	Print Post
	Thanks for the report. Can you attach the log file from your Build Folder "PSRAM_Test_N16R8_noide.ino_DebugGDB.log". If you cannot see this please enable the settings at the top of the page and add the complete build output from your project for us to review.


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StephenB Newbies Offline Posts: 5 Joined: Feb 14^th, 2024	Re: Hardware Debugging ESP32-S3 core using integrated JTAG over USB Reply #2 - Feb 15^th, 2024 at 3:16pm	Print Post
	Hi, I think the attached log file was from the same session. Thanks

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Simon@Visual Micro Administrator Offline Posts: 2351 Joined: Feb 13^th, 2019	Re: Hardware Debugging ESP32-S3 core using integrated JTAG over USB Reply #3 - Feb 15^th, 2024 at 3:51pm	Print Post
	Thanks for the log, there should also be another file "PSRAM_Test_N16R8_noide.ino_DebugOpenOCD.log". When you next replicate it can you send the logs again as well, just in case there are any further clues. I can replicate what appears to be the same issue stepping into delay() and various other functions, but only if I have 2 breakpoints already set. If I reduce this to 1 then it seems to work OK.... do you have 2 or more breakpoints already set in your software?


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StephenB Newbies Offline Posts: 5 Joined: Feb 14^th, 2024	Re: Hardware Debugging ESP32-S3 core using integrated JTAG over USB Reply #4 - Feb 15^th, 2024 at 3:56pm	Print Post
	Log ans INO attached. I have only 1 breakpoint. I will rerun.

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Simon@Visual Micro Administrator Offline Posts: 2351 Joined: Feb 13^th, 2019	Re: Hardware Debugging ESP32-S3 core using integrated JTAG over USB Reply #5 - Feb 15^th, 2024 at 4:09pm	Print Post
	Thanks for the update, Can you confirm a specific function you get the error stepping into? If you can also attach the full build output with the settings enabled shown at the top of the page it will allow us to see all the other options selected so we can replicate more accurately.


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StephenB Newbies Offline Posts: 5 Joined: Feb 14^th, 2024	Re: Hardware Debugging ESP32-S3 core using integrated JTAG over USB Reply #6 - Feb 15^th, 2024 at 4:56pm	Print Post
	The breakpoint was on: Line 22 Serial.printf("Total PSRAM: %d\r\n", ESP.getPsramSize()); I then select stepin the error is thrown in esp32.cpp @ line 155 which is the start of EspClass::getPsramSize(void). I will email VM build log and the debug logs.
	« Last Edit: Feb 15^th, 2024 at 4:57pm by StephenB »

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Simon@Visual Micro Administrator Offline Posts: 2351 Joined: Feb 13^th, 2019	Re: Hardware Debugging ESP32-S3 core using integrated JTAG over USB Reply #7 - Feb 16^th, 2024 at 4:47pm	Print Post
	Thanks for the logs and we have setup the same sketch and debugging settings, however the issue (and errors in the logs) only seems to replicate for us when we have 2 breakpoints set in total. If only 1 or 0 are set the stepping in and over works without generating the "unknown stopping event". In the logs from GDB it shows it cannot insert the breakpoint: &"Warning:\n" &"Cannot insert breakpoint 0.\n" &"Cannot access memory at address 0x42001842\n" And due to the quirks of the ESP32 OpenOCD implementation this is most often due to there being 2 breakpoints already set, so when the step function tries to inject another breakpoint it fails as there are only 2 hardware breakpoints allowed at any one time. https://docs.espressif.com/projects/esp-idf/en/v4.2-beta1/esp32/api-guides/jtag-... We will continue looking at this as improving GDB's knowledge of the Flash Map may potentially help. Do you have any disabled breakpoints set in the code or in files that aren't open? (the Debug > Windows > Breakpoints list can be used to see them all in one place)


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StephenB Newbies Offline Posts: 5 Joined: Feb 14^th, 2024	Re: Hardware Debugging ESP32-S3 core using integrated JTAG over USB Reply #8 - Feb 27^th, 2024 at 11:44am	Print Post
	Sorry for the delay. I have checked and there is only one breakpoint shown in the Breakpoints window.


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