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Look up tables of the CLA Maths not copied to the CLA Data ROM

Abayomi Babatola
Intellectual 315 points
Part Number: TMS320F280049C
Other Parts Discussed in Thread: C2000WARE

Hello,

I would like to do a sin calculation with my CLA.  After going and using the CLA_MATH_LIB_UG.pdf as a guide, my .map file does not seem to be correct as the CLA DATA ROM is empty.

I used the below configuration in the linker command file to instruct the linker to put the tables in the CLA DATA ROM

CLA1mathTables : LOAD = CLA1_DATAROM, /* Load to CLA DATA ROM, run from CLA math tables of the clamath RAM */
                         RUN = CLA1_DATAROM_RUN,
                         PAGE = 1

The above configuration was based on the example in  ti\c2000\C2000Ware_4_03_00_00\libraries\boot_rom\f28004x\revB\rom_sources\F28004x_ROM\ClaROM\cmd

My codw builds well but after inspecting my .map file, it is not as expected.

1.  The CLA1mathTables is missing in the .map file

2.  The CLA1_DATAROM and CLA1_DATAROM_RUN memory areas are empty

         CLA1_DATAROM          01001870   0000078a  00000000  0000078a  RWIX

          CLA1_DATAROM_RUN      0000f870   0000078a  00000000  0000078a  RWIX

However it seems the tables are placed correctly

3. The tables are placed here below

abs 0000fd4a CLAsincosTable_Cos0
abs 0000fe4e CLAsincosTable_TABLE_SIZEDivTwoPi
abs 0000fe50 CLAsincosTable_TwoPiDivTABLE_SIZE
abs 0000fe52 CLAsincosTable_TABLE_MASK
abs 0000fe54 CLAsincosTable_Coef0
abs 0000fe56 CLAsincosTable_Coef1
abs 0000fe5a CLAsincosTable_Coef2
abs 0000fe5c CLAsincosTable_Coef3

4. The CLAsin is placed in the cla1 programe memory I defined

0008a3c6    00000038     cla2_math_library_datarom_fpu32_eabi.lib : CLAsin.obj (Cla1Prog:_CLAsin)

I woul like to verify why the 1 and 2 above are so and what I could be doing wrongly.

Thanks

  • 0
    TI__Guru* 90965 points

    The ROM tables are part of the device - stored in Read Only Memory (ROM). If you open a memory window to the "run" address when debugging the CLA you should see them. Likewise the c28x side they are in the "load" address. For the project, the memory allocation only tells the linker where the tables are so they can be accessed appropriately.

  • 0 in reply to Lori Heustess
    Intellectual 315 points

    Hello Lori,

    Thanks for the reply.

    I checked the memory of the device as you suggested.  The CLA1_DATAROM_RUN has a continous range of numbers in the memory region and same with the CLA flash memory area.  However I need clarification on two points below:

    1. For the CLAsin calculation in my code,  in my .map file the symbols below are not present

    _CLAsinTable
    _CLAsinTableEnd

    Is this normal?  

    Most of the symbols present were the one I posted in the previous thread.

    2. What does all the numbes mean in the memory area?

    Thanks

  • 0 in reply to Lori Heustess
    Intellectual 315 points

    Hi,

    I still have a question with the cla_sin example.

    In the CLA task2 with the function below:

    __attribute__((interrupt)) void Cla1Task2(void)
    {
    //
    // Test inline function
    // Project must use --opt_level= 0 or higher for inline to occur
    //
    __mdebugstop();
    fResult2 = CLAsin_inline(fVal);
    }

    I could not find the CLAsin_inline function.  Please where is the function located.  I would like to study it and see if it helps me.

    Thanks

  • 0 in reply to Abayomi Babatola
    TI__Guru* 90965 points

    If the symbols were defined in the linker .cmd file then they should be in the map file. I will try building the example tomorrow to check. 

    The source of the tables can be found in the C:\ti\c2000\C2000Ware<version>\libraries\math\CLAmath\c28\source folder

    or in

    C:\ti\c2000\C2000Ware<version>\libraries\boot_rom\f28004x\revB\rom_sources\F28004x_ROM\ClaROM\source

  • 0 in reply to Abayomi Babatola
    TI__Guru* 90965 points
    Abayomi Babatola said:
    I could not find the CLAsin_inline function.  Please where is the function located.  I would like to study it and see if it helps me.

    The inline versions are in the CLAmath.h file in the directory:

    C:\ti\c2000\C2000Ware<version>\libraries\math\CLAmath\c28\include

  • 0 in reply to Abayomi Babatola
    TI__Guru* 90965 points
    Abayomi Babatola said:

    1. For the CLAsin calculation in my code,  in my .map file the symbols below are not present

    _CLAsinTable
    _CLAsinTableEnd

    These symbols are created in the linker file to copy the tables from flash into CLA RAM.  In this case, the tables are already available in CLA ROM so no copy is required. Thus the symbols are not used/needed. 

    In the .map you should see the table symbols in CLA ROM:

  • +1 in reply to Lori Heustess
    Intellectual 315 points

    My CLA code now works well. 

    I had to go through the entire process to be sure my implementaiton was correct and also to  properlly define the data sections for the data the CLA would use.