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TMS320F28035: load the flash programming example in Flash

Johnny Chen
Expert 4930 points
Part Number: TMS320F28035

Tool/software:

Hi Champ,

I try to load the flash programming example (Example_Flash2803x_API) in flash, so that the example could run from flash, then in runtime, executing flash operation in RAM.

However, adding the Flash Linker cmd file (F28035.cmd) into the project and having memcpy and InitFlash() in main, it seems the code not run properly in flash.

Also, the pragma was initially put there with #pragma CODE_SECTION (Example_CallFlashAPI,"ramfuncs");

Do I miss any configuration to have the example to load in Flash in the beginning ?

Regards,

Johnny

  • 0
    TI__Expert 4930 points

    Hi Champ,

    Any chance to have some input here ?

    Regards,

    Johnny

  • 0 in reply to Johnny Chen
    TI__Expert 4930 points

    Hi Champ,

    Any comment on this ?

    Looking forward to your support.

    Regards,

    Johnny

  • 0 in reply to Johnny Chen
    TI__Guru* 80190 points

    Johnny,

    The native example should have the correct .cmd file included; Example_Flash28035_ROM_API.cmd.  The key addition to this file vs a "regular" cmd is the addition of a "ramfunc" section as below:

     ramfuncs            : LOAD = FLASHA, 
                         RUN = PRAML0, 
                         LOAD_START(_RamfuncsLoadStart),
                         LOAD_END(_RamfuncsLoadEnd),
                         RUN_START(_RamfuncsRunStart),
                         PAGE = 0

    Inside the main.c file "Example_Flash2803x_API.c" there are two additions vs RAM only code and that is the Example_MemCopy function call(that copies the code from Flash to RAM) and the #pragma CODE_SECTION() that are inserted before the functions that we want to run from RAM.

    void Example_MemCopy(Uint16 *SourceAddr, Uint16* SourceEndAddr, Uint16* DestAddr)
{
    while(SourceAddr < SourceEndAddr)
    { 
       *DestAddr++ = *SourceAddr++;
    }
    return;
}

#pragma CODE_SECTION(Example_Error,"ramfuncs");
void Example_Error(Uint16 Status)
{

//  Error code will be in the AL register. 
    asm("    ESTOP0");
    asm("    SB 0, UNC");
}
etc

    Best,

    Matthew