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TMS320F28P550SJ: Alignment in linker command files

Pawan Nayak
Expert 3955 points
Part Number: TMS320F28P550SJ
Other Parts Discussed in Thread: UNIFLASH

Tool/software:

Why do we use ALIGN(8) for .TI.ramfunc section and everywhere else in the linker command file but use ALIGN(4) for the Cla1Prog section.

  • 0
    TI__Expert 5870 points

    Hi,

    Flash needs 64-bit or 128 bit alignment, both ALIGN(4) and ALIGN(8) works.

    However, if customer uses only CCS flash plugin and Uniflash, then ALIGN(4) is fine.  This will save some memory for them when there are too many sections in their linker command file.  If the number of sections are not too many, then ALIGN(8) is better - for performance enhancement.

    Regards,

    Rajeshwary

  • 0 in reply to Rajeshwary Nitin Bongirwar
    TI__Expert 3955 points

    Please help with further details.

    • Why is ALIGN(8) better for performance enhancement when compared to ALIGN(4)?
    • You mentioned for CCS flash plugin and uniflash ALIGN(4) is fine; is there some other tool where this will not work out?
    • In the linker command why is there a difference between ALIGN for CLA vs other memory sections?

    Thanks and regards, Pawan

  • 0 in reply to Pawan Nayak
    TI__Expert 5870 points
    Pawan Nayak said:
    Why is ALIGN(8) better for performance enhancement when compared to ALIGN(4)?

    For faster programming.

    Pawan Nayak said:
    You mentioned for CCS flash plugin and uniflash ALIGN(4) is fine; is there some other tool where this will not work out?

    Other 3rd party tool might use ALIGN(8).

    Pawan Nayak said:
    In the linker command why is there a difference between ALIGN for CLA vs other memory sections?

    No sure about this may be we have to check with CLA expert.

    Regards,

    Rajeshwary