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MCU-PLUS-SDK-AM263PX: SBL OSPI Bootloader Configuration Lockstep Operating Mode

TollMan
Intellectual 445 points
Part Number: MCU-PLUS-SDK-AM263PX
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

The SBL OSPI example project

    mcu_plus_sdk_am263px_09_02_00_56\examples\drivers\boot\sbl_ospi\am263px-cc

... in SDK:

  mcu_plus_sdk_am263px_09_02_00_56

... uses Lockstep in the BOOTLOADER driver configuration.

See:

Questions:

1)

Is this the project used to build the prebuilt image in:

  mcu_plus_sdk_am263px_09_02_00_56\tools\boot\sbl_prebuilt\am263px-cc

2)

What is the reason for the Lockstep configuration?

  • 0
    TI__Mastermind 34537 points
    TollMan said:

    Is this the project used to build the prebuilt image in:

      mcu_plus_sdk_am263px_09_02_00_56\tools\boot\sbl_prebuilt\am263px-cc

    Hi Scott, that is correct conclusion, as a part of post build step the built binary is copied to the prebuilt folder

  • 0
    TI__Mastermind 34537 points
    TollMan said:

    2)

    What is the reason for the Lockstep configuration?

    No particular reason, just one of the option that can be selected.

  • 0 in reply to Nilabh Anand
    Intellectual 445 points

    Hi Nilabh,

    3)

    I use OSPI SBL while running the cores in "standalone" mode (cores running different executables) without noticing problems.

    If "Lockstep" is selected, for the BOOTLOADER parameters:

      R5FSS0 Operating Mode

      R5FSS1 Operating Mode

    ... does this mean that the cores are expected to execute om lockstep mode?

    4)

    I want to use:

        mcu_plus_sdk_am263px_09_02_00_56\examples\drivers\boot\sbl_ospi\am263px-cc

    ... as the a starting point for a OSPI SBL.

    My cores will be running different executables. Is it important to use "standalone" mode for BOOTLOADER parameters:

      R5FSS0 Operating Mode

      R5FSS1 Operating Mode

    ... ?

    Regards,

    Tollman

  • 0 in reply to TollMan
    TI__Mastermind 34537 points
    TollMan said:

    I use OSPI SBL while running the cores in "standalone" mode (cores running different executables) without noticing problems.

    If "Lockstep" is selected, for the BOOTLOADER parameters:

      R5FSS0 Operating Mode

      R5FSS1 Operating Mode

    ... does this mean that the cores are expected to execute om lockstep mode?

    Hi Tollman,

    This is not very clear to me. Do you see any issue with cores running in non-lockstep mode?

  • 0 in reply to TollMan
    TI__Mastermind 34537 points
    TollMan said:

    I want to use:

        mcu_plus_sdk_am263px_09_02_00_56\examples\drivers\boot\sbl_ospi\am263px-cc

    ... as the a starting point for a OSPI SBL.

    My cores will be running different executables. Is it important to use "standalone" mode for BOOTLOADER parameters:

      R5FSS0 Operating Mode

      R5FSS1 Operating Mode

    ... ?

    This would be a choice. Can you explain your bootloader design a bit, so I comment better here?

    Again 

  • 0 in reply to Nilabh Anand
    TI__Mastermind 34537 points

    Hi Tollman,

    Any update on this thread.

  • 0 in reply to Nilabh Anand
    Intellectual 445 points

    Hi Nilabh,

    Regarding:

    " Do you see any issue with cores running in non-lockstep mode?"

    I'm not having a problem, but the configuration of:

      R5FSS0 Operating Mode

      R5FSS1 Operating Mode

    ... in the Bootloader SysConfig seems like it may either be wrong or irrelevant.

     

    I think, since my cores are not using lockstep, I may change the configuration to be "standalone".

    Please let me know if that is a good approach.

    Regards,

    Tollman

  • 0 in reply to TollMan
    TI__Mastermind 34537 points
    TollMan said:
    ... in the Bootloader SysConfig seems like it may either be wrong or irrelevant.

    Hi Tollman except IPC we do not use Standalone in any other example, so we tend to keep the two cores in lock step.

  • 0 in reply to TollMan
    TI__Mastermind 34537 points
    TollMan said:

    I think, since my cores are not using lockstep, I may change the configuration to be "standalone".

    Please let me know if that is a good approach.

    Yes it is a good approach if you need standalone alone mode for your application. As i mentioned before it is a application level consideration.