Help with System Viewer

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  • Help with System Viewer

    Hello,

    I am trying to use System View with 16 bit MCU (MSP430). I want to record user events in "Post Mortem mode".

    I have been able to compile and run my application with the SEGGER_* files. When I read the _UpBuffer[] before it is full, it works. I can see my events in the SystemView GUI.
    However, when my device runs for longer time, such that there is wrap around in _UpBuffer[], then I can't get any events. The problem appears to be that no sync information is written to the _UpBuffer[].

    Would you have any suggestions? What should I try next?

    For your reference, the following are the configuration or modifications that I have made to the SEGGER_* files. Please let me know if you see any errors:


    SEGGER_RTT_Conf.h: ------------------------

    #define SEGGER_RTT_MAX_NUM_UP_BUFFERS (2)
    #define SEGGER_RTT_MAX_NUM_DOWN_BUFFERS (0)
    #define BUFFER_SIZE_UP (4)
    #define BUFFER_SIZE_DOWN (4)
    #define SEGGER_RTT_PRINTF_BUFFER_SIZE (0)



    SEGGER_SYSVIEW_Conf.h: ------------------------

    #define SEGGER_SYSVIEW_RTT_BUFFER_SIZE 256
    #define SEGGER_SYSVIEW_RTT_CHANNEL 1
    #define SEGGER_SYSVIEW_USE_STATIC_BUFFER 1
    #define SEGGER_SYSVIEW_POST_MORTEM_MODE 1

    #if SEGGER_SYSVIEW_CORE == SEGGER_SYSVIEW_CORE_CM3
    ...
    #else
    #define SEGGER_SYSVIEW_GET_TIMESTAMP() SEGGER_SYSVIEW_X_GetTimestamp()
    #define SEGGER_SYSVIEW_TIMESTAMP_BITS 16
    #endif

    #define SEGGER_SYSVIEW_ID_BASE 0x1100
    #define SEGGER_SYSVIEW_ID_SHIFT 0


    SEGGER_SYSVIEW_ConfDefaults.h: ----------------------------------------------------------

    #ifndef SEGGER_SYSVIEW_SYNC_PERIOD_SHIFT
    #define SEGGER_SYSVIEW_SYNC_PERIOD_SHIFT 2 //AA ; recommended: Buffer size/16 default: 8
    #endif


    SEGGER_SYSVIEW_Config_NoOS.c: -------------------------

    //extern unsigned int SystemCoreClock; <- commented out

    #define SYSVIEW_APP_NAME "Quell"
    #define SYSVIEW_DEVICE_NAME "MSP430"
    #define SYSVIEW_TIMESTAMP_FREQ (512)
    #define SYSVIEW_CPU_FREQ (1000000)
    #define SYSVIEW_RAM_BASE (0x1100)


    Thank you,

    Andres Aguirre
    andres_aguirre@neurometrix.com