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TMS320F280025: Question about place the function into ram?

Lu Hang
Prodigy 225 points
Part Number: TMS320F280025


Dear expert:

        When I place function into ram area by add code such as"#pragma CODE_SECTION(adcA1ISR, ".TI.ramfunc");"before the relative code,I found the RAMGS0 area is taking up more place.Why does it take up RAMGS0 but not RAMM0 or RAMM1?

  • 0
    TI__Guru** 116021 points

    Hi Hang,

    The placement depends on how .TI.ramfunc section is defined. Can you share the linker cmd file.

    Regards,

    Vivek Singh

  • 0 in reply to Vivek Singh
    Prodigy 225 points

    Hi Vivek:

         .TI.ramfunc section is defined as following:

          

         The linker cmd file I used is "28002x_generic_flash_lnk.cmd",Since the TMS320F28002x has RAMM0 and RAMM1 besides RAMGS0,Could I modify the "RUN == RAMGS0" to "RUN == RAMGS0 | RAMM0 | RAMM1"?Could RAMM0 and RAMM1 be used like RAMGS0 to place application code.If RAMM0 and RAMM1 can be used to place application code,I will have more room to place my complexed algorithm so that the running speed of the relative code can be increased.

  • +1 in reply to Lu Hang
    TI__Guru** 116021 points
    Lu Hang said:
     The linker cmd file I used is "28002x_generic_flash_lnk.cmd",Since the TMS320F28002x has RAMM0 and RAMM1 besides RAMGS0

    FMAGS0 start address is 0xC000 where as end address of RAMM1 is 0x800 so these are not continuous address range. Are are putting this into RAMGS0 only so not sure why do you expect compiler to place it in RAMM0/RAMM1. RAMM0/RAMM1 can be used for application if not used for anything else. Generally these RAMs are used for stack but it's user choice. 

    Regards,

    Vivek Singh