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TMS320C6678: TMS320C6678 Timer implementation

hannesnfried
Prodigy 10 points

Part Number: TMS320C6678
Other Parts Discussed in Thread: SYSBIOS

Hello,

I would like to use a independent thread as a realtime timer. In my oppinion the easiest way to implement such a timer is to use a while loop for the timing of the timer. Is that a good idea? Is the execution time of the loop still the same all the time? In the final implementation I would like to change the loop-counter and therefore the timing of the timer with anaother independent thread in a hard deterministic way. This means that the timer finishes the time periode with the old setting (loop-counter) first and starts after that a new time periode with the new setting (loop-counter). So I have no unpredictable behavior of the timer during the changes of the loop-counter and therefore the timing. Is that possible? Are there any helpful hints for this? Or is there another possibility?

Thanks!

Best regards

W.JOHANNES

  • 0
    TI__Guru** 116840 points

    Johannes,

    There are many ways of implementing this but we need to understand what software you are using to provide appropriate guidance. Are you planning to implement this using bare-metal CSL code or using TI RTOS/SYSBIOS. You can configure a GP timer in HW in single shot mode so the timer triggers interrupt only ones per cycle and implement a loop or use it in continuous mode.

    I have attached few examples for timer that we have previously created for users to provide a starting point for your implementation.

    Timer example using CSL (bare-metal):

    4744.C6678_timer_ex_mcsdk.zip

    Hope this helps.

    Timer Example implementation using SYSBIOS:

    2313.C6678_timer_sysbios.zip

    Regards,

    Rahul