SystemView on STM32F779 not connecting with SWD but only JTAG

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    • SystemView on STM32F779 not connecting with SWD but only JTAG

      Hi,

      I am running a SystemView patched FreeRTOS 10 on the STM32F779-EVAL board using the J-Link Plus and Eclipse to debug. My problem is that SystemView is connecting rather irregularly and cannot be started with SWD interface. Let me try to explain.

      From Eclipse I can debug my code just fine and see the outputs using J-Link RTT Client using SWD as interface. When I start SystemView and press record I get the error:

      "Failed to start recording"
      "Could not connect"

      If I do the same but using JTAG as interface for Eclipse and SystemViewer, it works just fine.

      The odd thing is if I then close the Eclipse debug session, and switch the interface to SWD, SystemViewer now works using SWD.

      It seems like I have to run a JTAG session first before I can run a SWD session. Any ideas what could cause the connection problems using SystemViewer and SWD?

      Setup:

      Windows 7
      Eclipse Mars.2
      FreeRTOS 10
      STM32F779-EVAL
      J-Link v. 6.32d
      SystemView v. 2.52a

      Best Regards,
      Ulrich
    • Hello Ulrich,

      Thank you for your inquiry.
      Could you provide us with a J-Link log file of such a session where connect with SWD fails?
      wiki.segger.com/Enable_J-Link_log_file

      Best regards,
      Nino
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