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Compiler/TMS320F28377D: CLA data sharing with the CPU

reto.gaechter
Intellectual 260 points
Part Number: TMS320F28377D

Tool/software: TI C/C++ Compiler

Hello 

I have some general CLA questions

In the documentation I read that the 

CPU1.CLA1 to CPU1
128x16 MSG RAM 

With this memory size I would expect that I can share 64 Float types. But when I create an array with more than 32 floats I will get an linker error  that the memory size is not sufficient. Are only 32 floats allowed to be used? No errors are reported in that case.

This would be a limitation to the CLA which makes it difficult to used it. However is it possible to use the shared memory to transfer data from cla to cpu and vice versa? What are the restriction?

CPU1 Local Shared
6x 2Kx16
LS0-LS5 RAMs

How shall it be handled when a lot of data needs to be shared between CLA and CPU?

Reto  

  • 0
    Expert 2666 points
    Hi,

    Did you use float/double (same on C2000) or long double for your array of floats ?

    Regarding the local shared memories, you can share them between CLA and CPU, see paragraph 2.11.1.2 of the reference manual.

    Clément
  • 0
    TI__Mastermind 32995 points
    Hi Reto,

    Clement's response is helpful. You should be able to fit 64 floats.

    However, if you have other data linked to that section, the linker won't be able to fit it all.

    Do you have other data or variables in the message RAM?

    sal