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options of TCF graphical configuration

Jogging Song
Intellectual 685 points

Hi,all
Under the TCF graphical configuration tools,
in the Properties of Memory Section Manager,there is a
option named Segment For DSP/BIOS Objects.
Does it mean that a heap is used for DSP/BIOS Objects?
Why do DSP/BIOS Objects need a separate heap?

Is a heap always needed for DMA? In the DM6437 demo,
a heap is created, but I don't see the heap is used in
the source code.

Best Regards
Jogging

  • 0
    TI__Mastermind 24340 points

    Jogging Song said:
    Does it mean that a heap is used for DSP/BIOS Objects?

    Yes. From the CCS help:

    "Segment For DSP/BIOS Objects - The default memory segment to contain objects created at run-time with an XXX_create function. The XXX_Attrs structure passed to the XXX_create function can override this default. If you select MEM_NULL for this property, creation of DSP/BIOS objects at run-time via the XXX_create functions is disabled."

    Every dynamic allocation of memory  is done in the heap.

    Jogging Song said:
    Why do DSP/BIOS Objects need a separate heap?

     Is is not that DSP/BIOS needs a separate heap, it is that if you have heaps in more than one memory you can choose where the DSP/BIOS dynamic allocation should go - it is just more flexibility.

    Jogging Song said:
    Is a heap always needed for DMA? In the DM6437 demo,
    a heap is created, but I don't see the heap is used in
    the source code.

     DMA it self does not use heap, but any dynamic allocation of buffers/memory will use it - and that includes the DSP/BIOS functions mentioned on the help (above), MEM_alloc, sometimes the drivers or internal functions do some allocation, etc..