How to allocate an entire buffer in the same page?

Ari Mendes dos Santos

How can I ensure that all elements of a buffer will be on the same page.

ex.

Uint16 buffer[32];

I need to make sure that the entire buffer will be on the same page because it will be accessed using direct addressing on a assembler routine.

over 15 years ago

0 David Foley over 15 years ago

TI__Expert 8500 points

Ari,

The linker command file (.cmd) gives you the ability to define this buffer as its own section and place it exactly where you want it:

In the C file:

#pragma DATA_SECTION(buffer,"BufferSect");
Uint16 buffer[32];

In the .cmd file:

MEMORY
{
   PAGE 0:    /* Program Memory */
   PAGE 1:    /* Data Memory */
   MYRAM:    origin = 0x008000, length = 0x000020
}

SECTIONS
{
BufferSect :> MYRAM, PAGE=1
}

Regards,
Dave Foley

0 Mitja Nemec over 15 years ago in reply to David Foley

Genius 5885 points

Hi Ari,

while David's method works I prefer to use DATA_ALIGN pragma directive. This way you don't have to create additional memory section. So you don't hav to edit linker command file.

Regards, Mitja

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How to allocate an entire buffer in the same page?