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Original question:

AM263P4-Q1: xTaskDelayUntil Function Usage

AM263P4-Q1: xTaskDelayUntil() API No Source Modification

Mari Tsunoda
Expert 5726 points
Part Number: AM263P4-Q1


Tool/software:

Hi Nilabh,

I am re-opening this thread because the customer cannot change the source files. 

Is there an alternative API within the SDK that will allow for similar usage?

Best regards,

Mari Tsunoda

  • 0
    TI__Mastermind 18652 points

    Hi Mari,

    OPTION-01

    If customer wants to use xTaskDelayUntil(), they need to re-build the FreeRTOS Library by including the "INCLUDE_xTaskDelayUntil" macro in the FreeRTOSConfig.h file and then re-build the FreeRTOS stack using command-line make command.

    May I know what is the issue with modifying the FreeRTOSConfig.h file and re-building the lib? This will be a one-time activity only, and won't have to be re-build with the Application everytime.

    OPTION-02

    If customer cannot modify the FreeRTOSConfig.h and re-build the library

    The only option here is to use alternate delay APIs like vTaskDelayUntil (but this is also not enabled by default)

    Or if the customer is fine with using just vTaskDelay() function, this is supported and can be used, but the functionality is a bit different than xTaskDelayUntil

    vTaskDelay will place the calling task into blocked state for certain number of tick periods, whereas the xTaskDelayUntil will place it in blocked state for an absolute time (passed as function arguement). If customer can handle the calculation beforehand and can use vTaskDelay, then we are not blocked.

    But if absolute time needs to be passed, we will have to proceed with option-1

    Regards,
    Shaunak

  • 0 in reply to Shaunak Deshpande
    TI__Expert 5726 points

    Hi Shaunak,

    Thanks for the detailed answer and for your extremely quick response!

    To use vTaskDelayUntil, they will have to similarly make source changes to enable this API right? (This is what you mean by it is not enabled by default, correct?)

    Best regards,

    Mari Tsunoda

  • +1 in reply to Mari Tsunoda
    TI__Mastermind 18652 points

    Hi Mari,

    vTaskDelay - Available in out-of-box SDK

    xTaskDelayUntil - Unavailable, needs source code change and FreeRTOS Lib re-build

    vTaskDelayUntil - Unavailable, needs source code change and FreeRTOS Lib re-build

    Regards,
    Shaunak