Enable SWO during Debugging Microcontroller Renesas RA6M5 (R7FA6M5BH) with Jlink Ultra+ causes debugger disconnection and microcontroller in stuck (power cycle is necessary for recovery)

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    • Enable SWO during Debugging Microcontroller Renesas RA6M5 (R7FA6M5BH) with Jlink Ultra+ causes debugger disconnection and microcontroller in stuck (power cycle is necessary for recovery)

      I'm trying to use printf over ITM channel (SWO) with microcontroller Renesas RA6M5 (R7FA6M5BH)
      I'm using ozone (version 3.34) and my JLINK Ultra+ with JLINK updated to version 7.96H
      Ozone project is well configured for SWD and SWO (see attached ozone project "R7FA6M5_2Mb.jdebug")


      When i tried to enable SWO, during debug session (Right click on terminal console, "Capture SWO"), this operation causes debugger disconnection and microcontroller in stuck.
      After this operation debug is not possible anymore, even with a microcontroller reset: only a power cycle will recovery

      I captured JLINK DLL logger and i attached here ("LOGGER_OZONE.txt")
      My understanding is something wrong was done in sequence over microcontroller registers for enabling SWO.


      Let me add that instead i was able to use SWO inside Renesas e2studio, using a JLINK embedded on their demoboard (J-Link OB-S124 compiled Oct 30 2023 12:13:12)
      I captured SWO enabling also in this scenario and I attached here ("jlinkOB_seqSWO.txt")
      My understanding is that a difference sequence is performed by combination of e2studio and embedded jlink.
      Files

    • Hi pbizarri,

      could you please provide a complete J-Link log and a complete Ozone log, both recorded in the same debug session where you reproduce the issue? The snippets are too short for an analysis.

      Creating a J-Link log is described here: wiki.segger.com/J-Link_DLL#Enable_J-Link_Log_File, creating an Ozone log is described in section 8 of the Ozone user's manual.

      Best regards
      -- AlexD
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