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Stack size and Stack location

Ben Niazof
Prodigy 50 points

Hi,

I am working on 28069.

In the datasheet, it is specified that uppon reset, Stack Pointer is initiallized with RAMM1 start address.

This limit stack size to 0x400 words (size of RAM M1).

1. Must I place the stack in RAMM1

2. Can I make stack size larger

Thanks

Ben

  • 0
    Guru 192875 points

    Hi Ben,

    Ben Niazof said:
    1. Must I place the stack in RAMM1

    Yup in RAMMx, something like this:

    .stack              : > RAMM0        PAGE = 1

    or

    .stack           : > RAMM1,     PAGE = 1

    Ben Niazof said:
    2. Can I make stack size larger

    Yes, by navigating to : Project -> Properties -> Build -> C2000 Linker -> Basic Options -> Set C system stack size

    Regards,

    Gautam

  • 0
    Genius 5885 points
    As the stack pointer is only 16 bits wide, the stack has to be placed within low 64K. You can place it also in L0 to L6. You can also join M0 and M1 and place it there. This will double your stack size.

    If you place it in secure RAM, and if you are using CSM, you have to keep in mind that any code running from non-secure RAM can not use stack in secure RAM.

    You can set the size in linker settings

    I also found this app note useful as the CPU does not have any stack pointer monitoring www.ti.com/.../getliterature.tsp;fileType=pdf

    Regards, Mitja
  • 0 in reply to Mitja Nemec
    Prodigy 50 points
    Thanks,
    That's helpful.