TMS320F280048-Q1: DCL implementation and Flash loading

Hi Gokhan, 

Do you mind elaborating on what you meant by "it is required to reload the program to flash after re-energising my board"?

Hi Sen,

My system behaves like I'm running program on RAM. However, I load program to Flash in my project. My software gets lost after turn-off power. I need to re-load software again. It became after implementing DCL and updating linker command file according to run DCL properly.

This is my linker command file.

MEMORY
{
PAGE 0 :

   RAMM0           	: origin = 0x0000F5, length = 0x00030B

   RAMLS0          	: origin = 0x008000, length = 0x000800
   RAMLS1          	: origin = 0x008800, length = 0x000800
   RAMLS2      		: origin = 0x009000, length = 0x000800
   RAMLS3      		: origin = 0x009800, length = 0x000800
   RAMLS4      		: origin = 0x00A000, length = 0x000800
   RESET           	: origin = 0x3FFFC0, length = 0x000002
#ifdef __TI_COMPILER_VERSION__
   #if __TI_COMPILER_VERSION__ >= 20012000
GROUP {      /* GROUP memory ranges for crc/checksum of entire flash */
   #endif
#endif
   /* BEGIN is used for the "boot to Flash" bootloader mode   */

   BEGIN           	: origin = 0x080000, length = 0x000002
   /* Flash sectors */
   /* BANK 0 */
   FLASH_BANK0_SEC0  : origin = 0x080002, length = 0x000FFE	/* on-chip Flash */
   FLASH_BANK0_SEC1  : origin = 0x081000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC2  : origin = 0x082000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC3  : origin = 0x083000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC4  : origin = 0x084000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC5  : origin = 0x085000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC6  : origin = 0x086000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC7  : origin = 0x087000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC8  : origin = 0x088000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC9  : origin = 0x089000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC10 : origin = 0x08A000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC11 : origin = 0x08B000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC12 : origin = 0x08C000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC13 : origin = 0x08D000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC14 : origin = 0x08E000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK0_SEC15 : origin = 0x08F000, length = 0x001000	/* on-chip Flash */

   /* BANK 1 */
   FLASH_BANK1_SEC0  : origin = 0x090000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC1  : origin = 0x091000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC2  : origin = 0x092000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC3  : origin = 0x093000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC4  : origin = 0x094000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC5  : origin = 0x095000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC6  : origin = 0x096000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC7  : origin = 0x097000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC8  : origin = 0x098000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC9  : origin = 0x099000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC10 : origin = 0x09A000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC11 : origin = 0x09B000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC12 : origin = 0x09C000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC13 : origin = 0x09D000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC14 : origin = 0x09E000, length = 0x001000	/* on-chip Flash */
   FLASH_BANK1_SEC15 : origin = 0x09F000, length = 0x000FF0	/* on-chip Flash */
   FLASH_BANK1_SEC15_DO_NOT_USE     : origin = 0x09FFF0, length = 0x000010  /* Reserve and do not use for code as per the errata advisory "Memory: Prefetching Beyond Valid Memory" */

#ifdef __TI_COMPILER_VERSION__
  #if __TI_COMPILER_VERSION__ >= 20012000
}  crc(_ccs_flash_checksum, algorithm=C28_CHECKSUM_16)
  #endif
#endif

PAGE 1 :

   BOOT_RSVD       : origin = 0x000002, length = 0x0000F3     /* Part of M0, BOOT rom will use this for stack */
   RAMM1           : origin = 0x000400, length = 0x000400     /* on-chip RAM block M1 */

   RAMLS5      : origin = 0x00A800, length = 0x000800
   RAMLS6      : origin = 0x00B000, length = 0x000800
   RAMLS7      : origin = 0x00B800, length = 0x000800

   RAMGS0      : origin = 0x00C000, length = 0x002000
   RAMGS1      : origin = 0x00E000, length = 0x002000
   RAMGS2      : origin = 0x010000, length = 0x002000
   RAMGS3      : origin = 0x012000, length = 0x002000
}


SECTIONS
{
   codestart        : > BEGIN,     PAGE = 0, ALIGN(4)
   .text            : >>FLASH_BANK0_SEC1 | FLASH_BANK0_SEC2 | FLASH_BANK0_SEC3 | FLASH_BANK0_SEC4,   PAGE = 0, ALIGN(4)

    //Digital Controller Library functions
	dclfuncs		: > RAMLS4,		PAGE = 0
	ramfuncs		: > RAMLS4,		PAGE = 0


   .cinit           : > FLASH_BANK0_SEC1,     PAGE = 0, ALIGN(4)
   .pinit           : > FLASH_BANK0_SEC1,     PAGE = 0, ALIGN(4)
   .switch          : > FLASH_BANK0_SEC1,     PAGE = 0, ALIGN(4)
   .reset           : > RESET,     PAGE = 0, TYPE = DSECT /* not used, */

   .stack           : > RAMM1,     PAGE = 1
   .ebss            : > RAMLS5,    PAGE = 1
   .esysmem         : > RAMLS5,    PAGE = 1   
   .econst          : > FLASH_BANK0_SEC4,    PAGE = 0, ALIGN(4)

   ramgs0           : > RAMGS0,    PAGE = 1
   ramgs1           : > RAMGS1,    PAGE = 1

    .TI.ramfunc : {} LOAD = FLASH_BANK0_SEC1,
                         RUN = RAMLS0 | RAMLS1 | RAMLS2 |RAMLS3,
                         LOAD_START(_RamfuncsLoadStart),
                         LOAD_SIZE(_RamfuncsLoadSize),
                         LOAD_END(_RamfuncsLoadEnd),
                         RUN_START(_RamfuncsRunStart),
                         RUN_SIZE(_RamfuncsRunSize),
                         RUN_END(_RamfuncsRunEnd),
                         PAGE = 0, ALIGN(4)

   /* crc/checksum section configured as COPY section to avoid including in executable */
   .TI.memcrc          : type = COPY

}

/*
//===========================================================================
// End of file.
//===========================================================================
*/

Thanks in advance.

Looking at your linker cmd file, dclfuncs and ramfuncs are assigned to RAMLS4. For code that you load to Flash and run from RAM, you would use an approach like is used for .TI.ramfunc (further down in the file). And there would be an explicit memcpy() in your initialization code.

Hi Sira,

I got some points but not to know how to take correct actions.  

I will add lines to update linker command, as below? Is it correct?

.dclfuncs.memcrc : type = COPY
.ramfuncs.memcrc : type = COPY

Actually, I have below line at my main.

void Device_init(void)
{
    //
    // Disable the watchdog
    //
    SysCtl_disableWatchdog();

#ifdef _FLASH
    //
    // Copy time critical code and flash setup code to RAM. This includes the
    // following functions: InitFlash();
    //
    // The RamfuncsLoadStart, RamfuncsLoadSize, and RamfuncsRunStart symbols
    // are created by the linker. Refer to the device .cmd file.
    //
    memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
    //
    // Call Flash Initialization to setup flash waitstates. This function must
    // reside in RAM.
    //
    Flash_initModule(FLASH0CTRL_BASE, FLASH0ECC_BASE, DEVICE_FLASH_WAITSTATES);

Can you help?

Thanks in advance.

Gokhan,

1. What does .dclfuncs.memcrc mean? I don't understand that syntax/ have not used it.

2.Please refer to the approach used for .TI.ramfunc and follow the exact same approach

3. Create the same types of linker defined symbols (RamfuncsRunStart -> dclfuncsRunStart etc.) and create extern declarations for them in your code. Search for RamfuncsRunStart

Then you will need something like this in your code (it should be present already for Ramfuncs)

extern uint16_t RamfuncsRunStart;

extern uint16_t dclfuncsRunStart; (likewise for the other variables LoadStart LoadSize)

 memcpy(&dclfuncsRunStart, &dclfuncsLoadStart, (size_t)&dclfuncsLoadSize);

4. Since you already have .TI.ramfunc I don't know why you need another section called ramfuncs.