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Compiler/TMS570LS0714: how to assign the Const with detail address.

Huihuang Chen
Expert 4060 points

Part Number: TMS570LS0714
Other Parts Discussed in Thread: TEST2

Tool/software: TI C/C++ Compiler

Hi Champ,

If customer  define a const like below,

const uint16_t test1 = 0x1234;

and used this const  in the code like below way.

uint16_t test2;

test2 = test1;

But after build, we cannot found test1 in .const section in the map file.

My customer need to do calibration  and need the const with detail address.

Could you advise the way?

Thanks!

 

  • 0
    Guru 92251 points

    With TI compiler v20.2.1 I found that declaring test1 as volatile makes it's address appear in the map file.

    I.e. in the code:

    const volatile uint16_t test1 = 0x1234;

    And in the map file:

    GLOBAL SYMBOLS: SORTED BY Symbol Address 

address   name                          
-------   ----   

00000120  test2                         
00000124  test1

  • 0 in reply to Chester Gillon
    TI__Expert 4060 points

    Hi Chester,

    May i know for old version compiler, any workaround?

    Does it means start from v20.2.1 the const with address will be supported>

  • 0 in reply to Huihuang Chen
    Guru 92251 points

    Huihuang Chen said:
    May i know for old version compiler, any workaround?

    I don't have the details to check if the behaviour has changed over compiler versions.

    Looking with some other compiler versions:

    • v18.1.5 still shows test1 in the map file when used const volatile uint16_t
    • v16.9.9 still shows test1 in the map file when used const volatile uint16_t

    Perhaps you can ask George Mock for a more definitive answer.