[SOLVED] Improving SystemView resolution

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  • [SOLVED] Improving SystemView resolution

    I'm using SystemView in order to get some insights on critical timing sections in my program and the resolution.
    SystemView is initialised with a resolution of only 32.768KHz, while the cpu clock is 64MHz. So I can see events changing every 30.5[usec], which is not enough (see screenshot).
    I'm using the nrf52840 with Zephyr as file system.
    Can this resolution be improved?
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    Images

    • systemview.jpg

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  • Hello,

    Thank you for your inquiry.
    Typically we recommend using the Cyclecounter of the MCU for the timestamps to get a resolution based on your CPU clock. But on some target devices the Cyclecounter is not available and some other timer/clock is used for reference, e.g. the RTC here.

    For more information about how to implement an alternative timestamp source see the SystemView documentation under SEGGER_SYSVIEW_GET_TIMESTAMP() and the referenced samples there.

    Best regards,
    Nino
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