TMS320F28034: Serial programming with c2prog and security password

Hi Massimo,

In the executable file that you provided to C2Prog, is there content mapped to Flash A sector as well?

Thanks and regards,
Vamsi

Hi Vamsi,

Thanks for the response.

I attached below my *.cmd file. As you can see I changed the allocation of FLASHA, because I needed more memory (So FlashA became the combination of FLASHH and FLASG). But in the real location of FLASHA (from 0X3F6000 to 0X3F7F80) there is nothing, theoretically.

C2prog gives me an error at address 0x3F7FF0 of memory, that is a location where it is stored the security password I think “(CSM_RSVD    : origin = 0x3F7F80, length = 0x000076)”

MEMORY
{
PAGE 0:    /* Program Memory */
           /* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE1 for data allocation */
   RAML0       : origin = 0x008000, length = 0x000800     /* on-chip RAM block L0 */
   RAML1       : origin = 0x008800, length = 0x000400     /* on-chip RAM block L1 */
   OTP         : origin = 0x3D7800, length = 0x000400     /* on-chip OTP */
   //FLASHH      : origin = 0x3E8000, length = 0x002000     /* on-chip FLASH */
   //FLASHG      : origin = 0x3EA000, length = 0x002000     /* on-chip FLASH */
   FLASHF      : origin = 0x3EC000, length = 0x002000     /* on-chip FLASH */
   FLASHE      : origin = 0x3EE000, length = 0x002000     /* on-chip FLASH */
   FLASHD      : origin = 0x3F0000, length = 0x002000     /* on-chip FLASH */
   FLASHC      : origin = 0x3F2000, length = 0x002000     /* on-chip FLASH */
   //FLASHA      : origin = 0x3F6000, length = 0x001F80     /* on-chip FLASH */
   FLASHA      : origin = 0x3E8000, length = 0x004000     /* on-chip FLASH */
   CSM_RSVD    : origin = 0x3F7F80, length = 0x000076     /* Part of FLASHA.  Program with all 0x0000 when CSM is in use. */
   BEGIN       : origin = 0x3F7FF6, length = 0x000002     /* Part of FLASHA.  Used for "boot to Flash" bootloader mode. */
   CSM_PWL_P0  : origin = 0x3F7FF8, length = 0x000008     /* Part of FLASHA.  CSM password locations in FLASHA */

   IQTABLES    : origin = 0x3FE000, length = 0x000B50     /* IQ Math Tables in Boot ROM */
   IQTABLES2   : origin = 0x3FEB50, length = 0x00008C     /* IQ Math Tables in Boot ROM */
   IQTABLES3   : origin = 0x3FEBDC, length = 0x0000AA	  /* IQ Math Tables in Boot ROM */

   ROM         : origin = 0x3FF27C, length = 0x000D44     /* Boot ROM */
   RESET       : origin = 0x3FFFC0, length = 0x000002     /* part of boot ROM  */
   VECTORS     : origin = 0x3FFFC2, length = 0x00003E     /* part of boot ROM  */

PAGE 1 :   /* Data Memory */
           /* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE0 for program allocation */
           /* Registers remain on PAGE1                                                  */

   BOOT_RSVD   : origin = 0x000000, length = 0x000050     /* Part of M0, BOOT rom will use this for stack */
   RAMM0       : origin = 0x000050, length = 0x0003B0     /* on-chip RAM block M0 */
   RAMM1       : origin = 0x000400, length = 0x000400     /* on-chip RAM block M1 */
   RAML2       : origin = 0x008C00, length = 0x000400     /* on-chip RAM block L2 */
   RAML3       : origin = 0x009000, length = 0x001000     /* on-chip RAM block L3 */
   FLASHB      : origin = 0x3F4000, length = 0x002000     /* on-chip FLASH */

}

/* Allocate sections to memory blocks.
   Note:
         codestart user defined section in DSP28_CodeStartBranch.asm used to redirect code
                   execution when booting to flash
         ramfuncs  user defined section to store functions that will be copied from Flash into RAM
*/

SECTIONS
{

   /* Allocate program areas: */
   .cinit              : > FLASHA      PAGE = 0
   .pinit              : > FLASHA,     PAGE = 0
   .text               : > FLASHA      PAGE = 0
   codestart           : > BEGIN       PAGE = 0
   ramfuncs            : LOAD = FLASHD,
                         RUN = RAML0,
                         LOAD_START(_RamfuncsLoadStart),
                         LOAD_SIZE(_RamfuncsLoadSize),
                         RUN_START(_RamfuncsRunStart),
                         PAGE = 0

   csmpasswds          : > CSM_PWL_P0  PAGE = 0
   csm_rsvd            : > CSM_RSVD    PAGE = 0

   /* Allocate uninitalized data sections: */
   .stack              : > RAMM0       PAGE = 1
   //.ebss               : > RAML2       PAGE = 1
   //.esysmem            : > RAML2       PAGE = 1
   .ebss               : > RAML3       PAGE = 1
   .esysmem            : > RAML3       PAGE = 1

   /* Initalized sections go in Flash */
   /* For SDFlash to program these, they must be allocated to page 0 */
   .econst             : > FLASHA      PAGE = 0
   .switch             : > FLASHA      PAGE = 0

   /* Allocate IQ math areas: */
   IQmath              : > FLASHA      PAGE = 0            /* Math Code */
   IQmathTables        : > IQTABLES,   PAGE = 0, TYPE = NOLOAD

  /* Uncomment the section below if calling the IQNexp() or IQexp()
      functions from the IQMath.lib library in order to utilize the
      relevant IQ Math table in Boot ROM (This saves space and Boot ROM
      is 1 wait-state). If this section is not uncommented, IQmathTables2
      will be loaded into other memory (SARAM, Flash, etc.) and will take
      up space, but 0 wait-state is possible.
   */
   /*
   IQmathTables2    : > IQTABLES2, PAGE = 0, TYPE = NOLOAD
   {

              IQmath.lib<IQNexpTable.obj> (IQmathTablesRam)

   }
   */
    /* Uncomment the section below if calling the IQNasin() or IQasin()
       functions from the IQMath.lib library in order to utilize the
       relevant IQ Math table in Boot ROM (This saves space and Boot ROM
       is 1 wait-state). If this section is not uncommented, IQmathTables2
       will be loaded into other memory (SARAM, Flash, etc.) and will take
       up space, but 0 wait-state is possible.
    */
    /*
    IQmathTables3    : > IQTABLES3, PAGE = 0, TYPE = NOLOAD
    {

               IQmath.lib<IQNasinTable.obj> (IQmathTablesRam)

    }
    */

   /* .reset is a standard section used by the compiler.  It contains the */
   /* the address of the start of _c_int00 for C Code.   /*
   /* When using the boot ROM this section and the CPU vector */
   /* table is not needed.  Thus the default type is set here to  */
   /* DSECT  */
   .reset              : > RESET,      PAGE = 0, TYPE = DSECT
   vectors             : > VECTORS     PAGE = 0, TYPE = DSECT

}

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

Best regards,

Massimo.

Massimo,

In your linker command file, you have  csmpasswds  : > CSM_PWL_P0  PAGE = 0.

This means that it will try to reprogram the passwords as well.

Thanks and regards,

Vamsi

Vamsi,

sorry but I think I still have something to understand about linker files. So to solve the problem I changed the lines for the password in the following way (adding DSECT):

csmpasswds : > CSM_PWL_P0 PAGE = 0, TYPE = DSECT
csm_rsvd : > CSM_RSVD PAGE = 0, TYPE = DSECT

In C2prog I need always to deselect "Smart sector selection" box and to erase all the Flash sectors except Flash A.

In this way all works fine.

Is this corretct?

Thanks and regards,

Massimo.

Hi Massimo,

If I remember correctly, the smart sector selection auto-selects the sectors that it has to erase based on the addresses present in the input flash image file.

If you want to avoid erasing a given sector for any reason even though there is some content mapped to that sector in your flash image, then yes, you need to deselect that box.

I can get back and confirm.

Thanks and regards,
Vamsi

Hi Vamsi,

Thanks! If you can confirm it will be helpful.

It would be enough for me not to just erase the password sectors if possible.

Can there be problems if I don't erase the rest of Flash A before reprogramming?

Regards,

Massimo.

Hi Massimo, 

Since I did not hear back from you, I am closing this post assuming that my last reply helped you to close the issue.

If you still have further questions, you can open a new post as needed.

Thanks and regards,

Vamsi