CCS/TMS570LS3137: How to copy the code from flash to ram with GCC tools?

You can use memcpy() function to copy a section from flash to SRAM, then execute the code in this section from SRAM.

1. define a section in linker cmd file

mySection:
{
       myCode_ToBeExecute_From_RAM.obj (.text)
} load = FLASH0, run = SRAM, LOAD_START(myCode_LoadStart), RUN_START(myCode_RunStart), SIZE(myCode_Size)

2. copy this section to SRAM in your main() or startup()

    extern unsigned int myCode_LoadStart;

    extern unsigned int myCode_RunStart;

    extern unsigned int myCode_Size;

    memcpy(&myCode_RunStart, &myCode_LoadStart, (uint32)&myCode_Size);

Hi QJ Wang,

I'm using GCC compiler to generate the code,and I get the ld file instead of cmd file,how to do in the ld file,can you give me an example code?

Thanks.

Hello,

I don't have a example. You can modify the ld file generated by HALCOGen. 

Hi QJ Wang,

I modified the ld file,but I got a syntax error,how to write the code?

Thanks.

 .ARM.attributes 0 : { *(.ARM.attributes) }
 
   ramfuncs : LOAD = FLASH,
              RUN = RAM,
              LOAD_START(__RamfuncsLoadStart),
              LOAD_SIZE(__RamfuncsLoadSize),
              RUN_START(__RamfuncsRunStart)
 
 
 }