[SOLVED] RTT restart with bootloader and app

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  • [SOLVED] RTT restart with bootloader and app

    I have an application with a separate bootloader and app partitions.

    If I enable RTT in the bootloader, I will not see the RTT Logs on the RTT Viewer once I jump to the app.

    If I disable the RTT on the boot, then I see it in the app, but now I have no logs for the bootloader.

    Is there are way to restart the RTT to allow logs to be seen on both applications? I have tried running the RTT Init at the start of each applications.

    Perhaps I need to specify a fixed RAM location for the RTT ram buffer so there is continuity between the Boot and App RTT logs?

  • Hi,

    You might link the RTT control block & buffers to a fixed location, which is identicial in the BTL and APP.
    Furthermore, the RTT control block & buffers should be marked as “do not initialize” in the APP part (e.g. by placing them in zhe .no_init section).
    This way, the startup code of the APP will leave the RTT part alone, so no pending output from the BTL is lost/overwritten and the J-Link RTT logic is not confused by the control block & buffer locations to change at runtime.
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