TMS320F28388D: No Symbols after Reset, program fails

Marcel Kummer

Part Number: TMS320F28388D

Hello everyone,

I currently have trouble getting my code working after a normal reset (pressing S1 on the TMS320F28388D control card) or after a power cycle.

When I reload the program via CCS (RAM or FLASH) everything is working fine. After a normal reset, the program won't work anymore (RAM or FLASH). And after a power cycle, it won't run either (only FLASH)

When I'm connecting with the debugger after a reset or if I stay connected during a reset, I can see that some variables are randomly changing. This lets me think, that some code is running, but somehow the execution is branching to a random location in memory and not to my written code. I have no idea how I am supposed to debug the problem because the execution never reaches main().

What could be the cause of such behavior? Why is the boot process different when loading the program via CCS / after any reset?

Thanks and regards,

Marcel Kummer.

over 4 years ago

+1 Vivek Singh over 4 years ago

TI__Guru** 115271 points

Hi Marcel,

There are couple of things to check here -

Boot mode pins setting - Please make sure the boot mode is set to flash boot. If not then program will not run to flash when not connected to CCS.
With CCS connected, device boots as per emulation boot after any reset hence you need to set proper emulation boot. With CCS, program entry point is forced by CCS after loading the code hence it works fine after loading the code but not when you issue reset. Please refer device TRM for detail about emulation boot.
CMD file - Please check that nothing is loaded in RAM because RAM content get cleared after power-up.

Regards,

Vivek Singh

0 Marcel Kummer over 4 years ago in reply to Vivek Singh

Expert 1015 points

Hello Vivek,

reset while being connected to CCS is not that important for me. I just want to be able to let the code run independend to CCS.

I now set both pins of the S2-Switch to off. In SPRUIL8B it's stated that this should be the boot to flash option. But the application still won't boot to flash after a reset (CCS not connected).

I also checked my FLASH cmd file, but couldn't find any memory that's wrongly placed in RAM instead of FLASH. Just to make sure, could you please verify this? (Maybe I understood a SECTION wrong and did a mistake there).

MEMORY
{
   /* BEGIN is used for the "boot to Flash" bootloader mode   */
   BEGIN            : origin = 0x080000, length = 0x000002
   BOOT_RSVD        : origin = 0x000002, length = 0x0001AE     /* Part of M0, BOOT rom will use this for stack */
   RAMM0            : origin = 0x0001B0, length = 0x000250
   RAMM1            : origin = 0x000400, length = 0x000400     /* on-chip RAM block M1 */
   RAMD0            : origin = 0x00C000, length = 0x000800
   RAMD1            : origin = 0x00C800, length = 0x000800
   RAMLS0_to_LS7    : origin = 0x008000, length = 0x004000
/*   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 */
/*   RAMLS5           : origin = 0x00A800, length = 0x000800 */
/*   RAMLS6           : origin = 0x00B000, length = 0x000800 */
/*   RAMLS7           : origin = 0x00B800, length = 0x000800 */
   RAMGS0           : origin = 0x00D000, length = 0x001000
   RAMGS1           : origin = 0x00E000, length = 0x001000
   RAMGS2           : origin = 0x00F000, length = 0x001000
   RAMGS3           : origin = 0x010000, length = 0x001000
   RAMGS4           : origin = 0x011000, length = 0x001000
   RAMGS5           : origin = 0x012000, length = 0x001000
   RAMGS6           : origin = 0x013000, length = 0x001000
   RAMGS7           : origin = 0x014000, length = 0x001000
   RAMGS8           : origin = 0x015000, length = 0x001000
   RAMGS9           : origin = 0x016000, length = 0x001000
   RAMGS10          : origin = 0x017000, length = 0x001000
   RAMGS11          : origin = 0x018000, length = 0x001000
   RAMGS12          : origin = 0x019000, length = 0x001000
   RAMGS13          : origin = 0x01A000, length = 0x001000
   RAMGS14          : origin = 0x01B000, length = 0x001000
   RAMGS15          : origin = 0x01C000, length = 0x001000

   /* Flash sectors */
   FLASH0           : origin = 0x080002, length = 0x001FFE  /* on-chip Flash */
   FLASH1           : origin = 0x082000, length = 0x002000  /* on-chip Flash */
   FLASH2           : origin = 0x084000, length = 0x002000  /* on-chip Flash */
   FLASH3           : origin = 0x086000, length = 0x002000  /* on-chip Flash */
   FLASH4           : origin = 0x088000, length = 0x008000  /* on-chip Flash */
   FLASH5           : origin = 0x090000, length = 0x008000  /* on-chip Flash */
   FLASH6           : origin = 0x098000, length = 0x008000  /* on-chip Flash */
   FLASH7           : origin = 0x0A0000, length = 0x008000  /* on-chip Flash */
   FLASH8           : origin = 0x0A8000, length = 0x008000  /* on-chip Flash */
   FLASH9           : origin = 0x0B0000, length = 0x008000  /* on-chip Flash */
   FLASH10          : origin = 0x0B8000, length = 0x002000  /* on-chip Flash */
   FLASH11          : origin = 0x0BA000, length = 0x002000  /* on-chip Flash */
   FLASH12          : origin = 0x0BC000, length = 0x002000  /* on-chip Flash */
   FLASH13          : origin = 0x0BE000, length = 0x002000  /* on-chip Flash */
   
   CPU1TOCPU2RAM    : origin = 0x03A000, length = 0x000800
   CPU2TOCPU1RAM    : origin = 0x03B000, length = 0x000800

   CPUTOCMRAM0      : origin = 0x039000, length = 0x000200
   CPUTOCMRAM0_ECAT : origin = 0x039200, length = 0x000200
   CPUTOCMRAM1      : origin = 0x039400, length = 0x000400

   CMTOCPURAM0      : origin = 0x038000, length = 0x000200
   CMTOCPURAM0_ECAT : origin = 0x038200, length = 0x000200
   CMTOCPURAM1      : origin = 0x038400, length = 0x000400

   CANA_MSG_RAM     : origin = 0x049000, length = 0x000800
   CANB_MSG_RAM     : origin = 0x04B000, length = 0x000800
   RESET            : origin = 0x3FFFC0, length = 0x000002
}

SECTIONS
{
   codestart           : > BEGIN, ALIGN(4)
   .text               : >> FLASH1 | FLASH2 | FLASH3 | FLASH4, ALIGN(4)
   .cinit              : > FLASH1 | FLASH2 | FLASH3, ALIGN(4)
   .switch             : > FLASH1, ALIGN(4)
   .reset              : > RESET, TYPE = DSECT /* not used, */
   .stack              : > RAMGS0

#if defined(__TI_EABI__)
   .init_array      : > FLASH1, ALIGN(4)
   .bss             : > RAMLS0_to_LS7
   .bss:output      : > RAMLS0_to_LS7
   .bss:cio         : > RAMLS0_to_LS7
   .data            : > RAMLS0_to_LS7
   .sysmem          : > RAMLS0_to_LS7
   /* Initalized sections go in Flash */
   .const           : > FLASH5, ALIGN(4)
#else
   .pinit           : > FLASH1, ALIGN(4)
   .ebss            : > RAMLS0_to_LS7
   .esysmem         : > RAMLS0_to_LS7
   .cio             : > RAMLS0_to_LS7
   /* Initalized sections go in Flash */
   .econst          : >> FLASH4 | FLASH5, ALIGN(4)
#endif

   ramgs0 : > RAMGS0, type=NOINIT
   ramgs1 : > RAMGS1, type=NOINIT
   
   MSGRAM_CPU1_TO_CPU2 : > CPU1TOCPU2RAM, type=NOINIT
   MSGRAM_CPU2_TO_CPU1 : > CPU2TOCPU1RAM, type=NOINIT

   MSGRAM_CPU_TO_CM    : > CPUTOCMRAM0, type=NOINIT
   MSGRAM_CPU1_TO_CM_ECAT : > CPUTOCMRAM0_ECAT, type=NOINIT

   MSGRAM_CM_TO_CPU    : > CMTOCPURAM0, type=NOINIT
   MSGRAM_CM_TO_CPU1_ECAT : > CMTOCPURAM0_ECAT, type=NOINIT

   /* The following section definition are for SDFM examples */
   Filter_RegsFile  : > RAMGS0
   Filter1_RegsFile : > RAMGS1, fill=0x1111
   Filter2_RegsFile : > RAMGS2, fill=0x2222
   Filter3_RegsFile : > RAMGS3, fill=0x3333
   Filter4_RegsFile : > RAMGS4, fill=0x4444
   Difference_RegsFile : >RAMGS5, fill=0x3333

   #if defined(__TI_EABI__)
       .TI.ramfunc : {} LOAD = FLASH3,
                        RUN = RAMLS0_to_LS7,
                        LOAD_START(RamfuncsLoadStart),
                        LOAD_SIZE(RamfuncsLoadSize),
                        LOAD_END(RamfuncsLoadEnd),
                        RUN_START(RamfuncsRunStart),
                        RUN_SIZE(RamfuncsRunSize),
                        RUN_END(RamfuncsRunEnd),
                        ALIGN(4)
   #else
       .TI.ramfunc : {} LOAD = FLASH3,
                        RUN = RAMLS0_to_LS7,
                        LOAD_START(_RamfuncsLoadStart),
                        LOAD_SIZE(_RamfuncsLoadSize),
                        LOAD_END(_RamfuncsLoadEnd),
                        RUN_START(_RamfuncsRunStart),
                        RUN_SIZE(_RamfuncsRunSize),
                        RUN_END(_RamfuncsRunEnd),
                        ALIGN(4)
   #endif

}

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

Thanks and regards,

Marcel.

0 Vivek Singh over 4 years ago in reply to Marcel Kummer

TI__Guru** 115271 points

Hi Marcel,

cmd file look fine to me. After connecting to CCS, can you follow below step and see if it works fine -

Issue reset from CCS
In memory watch window, write 0x5AFF at address 0xD00
Click on "Run"

See if this runs your application. If not then you can halt the CPU and debug the code.

Regards,

Vivek Singh

0 Marcel Kummer over 4 years ago in reply to Vivek Singh

Expert 1015 points

Hello Vivek,

I came back to work today, powered up my board, and to my surprise, it booted the application.

I tried a few things now and could find out that, after I load the application with CSS, start all Cores, stop the debugging (which means disconnecting CCS) a normal Reset with the button S1 on the Control Card fails.

But after a power cycle, the application boots correct, and then a reset with S1 is working too.

So I assume, that CCS is making some settings in RAM which prevent the application to boot. After a power cycle, the RAM is zeroed which lets the application boot correctly again.

With this behaviour I am happy. At the moment I don't need the reset to work when I am connected with CCS.

Thanks and regards,

Marcel.

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TMS320F28388D: No Symbols after Reset, program fails