TMS320F28P650SK: CLA-defined/declared global/local variables initialized to zero by the compiler

Wayne Huang

Genius 17125 points

Part Number: TMS320F28P650SK

Hi champs,

I am asking this for our customer.

Given EABI output format,

For CLA-defined/declared global/local variables, we are aware that they should be initialized in CLA tasks.

But it seems they are initialized to zero before main from CCS emulation and the .cinit below.

Question:

Would you please confirm the compilers like V22.6.x and V25.11.x initialize CLA global/local variables to zero before main()?
If yes, the user only needs to initialize them to non-zero values. Is it correct?

0 Delaney Woodward 1 month ago

Hi Wayne,

I have reassigned this to our compiler team to take a look.

Best Regards,

Delaney

+1 Paul Ouellette 1 month ago

Wayne Huang said:
Would you please confirm the compilers like V22.6.x and V25.11.x initialize CLA global/local variables to zero before main()?

Yes, CLA global/static variables are zero-initialized if you are using EABI and the --rom_model linker option (which you are in this case).

From the C28x compiler manual sub-chapter titled C Language Restrictions:

if EABI is used, the linker generates a cinit entry to zero-initialize non-const global/static data

Wayne Huang said:
If yes, the user only needs to initialize them to non-zero values. Is it correct?

Correct.

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