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Call of BIOS_start() at the end of main()

Youssef Lyoussfi
Intellectual 390 points

Hi, 

Why the function BIOS_start() is called at the end of main() ?

Normally it should be called at the begenning of main() to execute the startup sequence of Sys/Bios.

Best regards

Youssef

  • 0
    Expert 1010 points

    Hi Youssef,

    BIOS_start() when called schedules the tasks if any else will run the idle loop. All of the start-up sequence would be taken care by GEL file and cfg file(configuration file).

    BIOS_start() once called will never return until BIOS_exit() is called.

    Warm Regards,

    Harsha

    If this answered your question mark the question as answered by clicking yes at the right bottom.

  • 0 in reply to Harsha J K
    Intellectual 390 points

    Hi Harsha,

    In the User's guide of Sys/Bios provided by TI page 49 it saids that  "The SYS/BIOS startup sequence that run when BIOS_start() is called"

    Best regards

    Youssef

  • 0 in reply to Youssef Lyoussfi
    TI__Mastermind 30830 points

    Youssef,

    The first line of the paragraph you reference in the User's Guide states that the BIOS_start() function should be called "at the end of the application's main() function".

    As Harsha points out, BIOS_start() DOES NOT RETURN.

    This is because BIOS_start() starts up task threads which then take over the application's flow of execution.

    In SYS/BIOS, the first part of main() is used by the application to perform its one-time-only application-specific initializations.

    Once that is completed, BIOS_start() marks the beginning of the application's operational functioning.

    Alan