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TMS320F280039C: TMS320F280039C: F280039C - About Flash write operation using Flash API

Tomotaroh Kohro
Genius 15765 points
Part Number: TMS320F280039C

Hello Support team.

 

This question is about Flash erase using Flash API (FAPI_F28003x_COFF_v1.58.01.lib).

Could you please explain why the second argument (pu16DataBuffer) of Fapi_issueProgrammingCommand() needs to be placed in 128-bit align?

Also Could you please explain why the third argument (pu32CheckValueBuffer) of api_doVerify() needs to be placed in 128-bit align?

 

For example, customer is understanding that system cannot write such as the below.

Is it correct ?

 

Best Regards

KORO

  • 0
    TI__Guru* 87105 points

    Hi Koro,

    I will reply to you tomorrow.

    Thanks and regards,

    Vamsi

  • 0 in reply to Vamsi Gudivada
    TI__Guru* 87105 points

    Hi Koro,

    Based on a few previous customer queries, we wanted to make it simple and hence mentioned that those data buffers have to be 128-bit aligned.

    However, as long as the address of the data buffer starts on a even address, it should be fine.  

    The diagram that you copied from customer is good to implement - no issue with that.

    Thanks and regards,

    Vamsi

  • 0 in reply to Vamsi Gudivada
    TI__Genius 15765 points

    Hello Vamsi-san

    > Based on a few previous customer queries, we wanted to make it simple and hence mentioned that those data buffers have to be 128-bit aligned.

    But your answer is that an even address can be used.

    if customer asked TI if TI has plan to modify this document, how we can answer it ?

    Best Regards

    KORO

  • 0 in reply to Tomotaroh Kohro
    TI__Guru* 87105 points

    Hi Koro,

    A clarification here in this forum should be enough I hope.  If not, please let them know that I wrote that guide.  128-bit alignment does not hurt - however, if the user is not able to maintain that, then an even address using ALIGN(2) should do.

    Thanks and regards,

    Vamsi