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SM320F28335-EP: Problem with sprintf function that generate an exception

Part Number: SM320F28335-EP

Hi,

I'm working with the F28335 EP micro.

I work with linker file that save and run the code in flash memory.

Now I'm trying to use the sprintf function but when the micro execute it the system generate and exception and finish to work.

I search on internet and I see that is a common problem. I follow also some threads on the forum as (link ) but it do not help me.

I changed in the linker the stack to 0x800 and the heap size to 0x800 but it still do not work.

I noted that if I write the in this way "sprintf(buff, "Test");" it works. But if I write the function in this way "sprintf(buff, "Test %d", var);" it fails and generate an exception.

I try with all the suggestion that I found on the forum but I did not able to use the sprintf in my project.

Thank you very much for your help.

Regards,
Andrea 

7 Replies

  • Andrea,
    Could you post the relevant files for changes you made?
    In the mean time, I am going to move this to the C2000 forum. They can provide better insight into debugging.
    Regards,
    Wade
  • In reply to Wade VonBergen:

    I worked a bit on the F28335 cmd and I modify this part :
    .stack : > RAML5 PAGE = 1 ( the original was .stack : > RAMM1 PAGE = 1 )

    I use the flash memory to store and run the program.

    The full file that I use is posted below:

    /*
    //###########################################################################
    //
    // FILE: F28335.cmd
    //
    // TITLE: Linker Command File For F28335 Device
    //
    //###########################################################################
    // $TI Release: F2833x/F2823x Header Files and Peripheral Examples V142 $
    // $Release Date: November 1, 2016 $
    // $Copyright: Copyright (C) 2007-2016 Texas Instruments Incorporated -
    // http://www.ti.com/ ALL RIGHTS RESERVED $
    //###########################################################################
    */

    /* ======================================================
    // For Code Composer Studio V2.2 and later
    // ---------------------------------------
    // In addition to this memory linker command file,
    // add the header linker command file directly to the project.
    // The header linker command file is required to link the
    // peripheral structures to the proper locations within
    // the memory map.
    //
    // The header linker files are found in <base>\DSP2833x_Headers\cmd
    //
    // For BIOS applications add: DSP2833x_Headers_BIOS.cmd
    // For nonBIOS applications add: DSP2833x_Headers_nonBIOS.cmd
    ========================================================= */

    /* ======================================================
    // For Code Composer Studio prior to V2.2
    // --------------------------------------
    // 1) Use one of the following -l statements to include the
    // header linker command file in the project. The header linker
    // file is required to link the peripheral structures to the proper
    // locations within the memory map */

    /* Uncomment this line to include file only for non-BIOS applications */
    /* -l DSP2833x_Headers_nonBIOS.cmd */

    /* Uncomment this line to include file only for BIOS applications */
    /* -l DSP2833x_Headers_BIOS.cmd */

    /* 2) In your project add the path to <base>\DSP2833x_headers\cmd to the
    library search path under project->build options, linker tab,
    library search path (-i).
    /*========================================================= */

    /* Define the memory block start/length for the F28335
    PAGE 0 will be used to organize program sections
    PAGE 1 will be used to organize data sections

    Notes:
    Memory blocks on F28335 are uniform (ie same
    physical memory) in both PAGE 0 and PAGE 1.
    That is the same memory region should not be
    defined for both PAGE 0 and PAGE 1.
    Doing so will result in corruption of program
    and/or data.

    L0/L1/L2 and L3 memory blocks are mirrored - that is
    they can be accessed in high memory or low memory.
    For simplicity only one instance is used in this
    linker file.

    Contiguous SARAM memory blocks can be combined
    if required to create a larger memory block.
    */


    MEMORY
    {
    PAGE 0: /* Program Memory */
    /* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE1 for data allocation */

    ZONE0 : origin = 0x004000, length = 0x001000 /* XINTF zone 0 */
    RAML0 : origin = 0x008000, length = 0x001000 /* on-chip RAM block L0 */
    RAML1 : origin = 0x009000, length = 0x001000 /* on-chip RAM block L1 */
    RAML2 : origin = 0x00A000, length = 0x001000 /* on-chip RAM block L2 */
    RAML3 : origin = 0x00B000, length = 0x001000 /* on-chip RAM block L3 */
    ZONE6 : origin = 0x0100000, length = 0x100000 /* XINTF zone 6 */
    ZONE7A : origin = 0x0200000, length = 0x00FC00 /* XINTF zone 7 - program space */
    FLASHH : origin = 0x300000, length = 0x008000 /* on-chip FLASH */
    FLASHG : origin = 0x308000, length = 0x008000 /* on-chip FLASH */
    FLASHF : origin = 0x310000, length = 0x008000 /* on-chip FLASH */
    FLASHE : origin = 0x318000, length = 0x008000 /* on-chip FLASH */
    FLASHD : origin = 0x320000, length = 0x008000 /* on-chip FLASH */
    FLASHC : origin = 0x328000, length = 0x008000 /* on-chip FLASH */
    FLASHA : origin = 0x338000, length = 0x007F80 /* on-chip FLASH */
    CSM_RSVD : origin = 0x33FF80, length = 0x000076 /* Part of FLASHA. Program with all 0x0000 when CSM is in use. */
    BEGIN : origin = 0x33FFF6, length = 0x000002 /* Part of FLASHA. Used for "boot to Flash" bootloader mode. */
    CSM_PWL : origin = 0x33FFF8, length = 0x000008 /* Part of FLASHA. CSM password locations in FLASHA */
    OTP : origin = 0x380400, length = 0x000400 /* on-chip OTP */
    ADC_CAL : origin = 0x380080, length = 0x000009 /* ADC_cal function in Reserved memory */

    IQTABLES : origin = 0x3FE000, length = 0x000b50 /* IQ Math Tables in Boot ROM */
    IQTABLES2 : origin = 0x3FEB50, length = 0x00008c /* IQ Math Tables in Boot ROM */
    FPUTABLES : origin = 0x3FEBDC, length = 0x0006A0 /* FPU 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 */
    RAML4 : origin = 0x00C000, length = 0x001000 /* on-chip RAM block L1 */
    RAML5 : origin = 0x00D000, length = 0x001000 /* on-chip RAM block L1 */
    RAML6 : origin = 0x00E000, length = 0x001000 /* on-chip RAM block L1 */
    RAML7 : origin = 0x00F000, length = 0x001000 /* on-chip RAM block L1 */
    ZONE7B : origin = 0x20FC00, length = 0x000400 /* XINTF zone 7 - data space */
    FLASHB : origin = 0x330000, length = 0x008000 /* 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: */
    /* The Flash API functions can be grouped together as shown below.
    The defined symbols _Flash28_API_LoadStart, _Flash28_API_LoadEnd
    and _Flash28_API_RunStart are used to copy the API functions out
    of flash memory and into SARAM */

    Flash28_API:
    {
    -lFlash28335_API_V210.lib(.econst)
    -lFlash28335_API_V210.lib(.text)
    } LOAD = FLASHD,
    RUN = RAML0,
    LOAD_START(_Flash28_API_LoadStart),
    LOAD_END(_Flash28_API_LoadEnd),
    RUN_START(_Flash28_API_RunStart),
    PAGE = 0
    .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_END(_RamfuncsLoadEnd),
    RUN_START(_RamfuncsRunStart),
    LOAD_SIZE(_RamfuncsLoadSize),
    PAGE = 0

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

    /* Allocate uninitalized data sections: */
    .stack : > RAML5 PAGE = 1
    .ebss : > RAML4 PAGE = 1
    .esysmem : > RAMM1 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 : > FLASHC 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)

    }
    */

    FPUmathTables : > FPUTABLES, PAGE = 0, TYPE = NOLOAD

    /* Allocate DMA-accessible RAM sections: */
    DMARAML4 : > RAML4, PAGE = 1
    DMARAML5 : > RAML5, PAGE = 1
    DMARAML6 : > RAML6, PAGE = 1
    DMARAML7 : > RAML7, PAGE = 1

    /* Allocate 0x400 of XINTF Zone 7 to storing data */
    ZONE7DATA : > ZONE7B, PAGE = 1

    /* .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

    /* Allocate ADC_cal function (pre-programmed by factory into TI reserved memory) */
    .adc_cal : load = ADC_CAL, PAGE = 0, TYPE = NOLOAD

    }

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


    What can I do to work with sprintf function?

    Regards,
    Andrea
  • In reply to Andrea Emili78:

    Hi Andrea,

    I'm sorry I did not get back to you sooner. Are you still having this issue?

    Whitney
  • In reply to Whitney Dewey:

    Yes,

    I still having the problem with sprintf.

    I increase the heap and and stack size as suggested in some forum but did not work for me.

    Have you some suggestions for me?

    Thank you.

    Best regards,

    Andrea

  • In reply to Andrea Emili78:

    Andrea,

    Can you tell me more about the buff variable? How and where is it declared? I want to know where it's stored.

    What kind of exception are you getting? Can you give me some more details?

    Thanks,
    Whitney
  • In reply to Whitney Dewey:

    Hi Whitney,

    thank you very much for your support and sorry for the delay but I have to go forward in my project.

    Today in order to answer to your question I did further tests.

    My code is the following:

    unsigned char ExploerF28335_Setup()

    {

    unsigned char explorerF28335_setup_status = EXPL_F28335_NO_ERROR;

    char buff[50];

    unsigned char temp_test = 10;

       ExploerF28335_InitIO();

       ExploerF28335_InitTimer();

       ExploerF28335_InitSCI();

       sprintf(buff,"Test printf");                        /*This function go weel and the program go forward*/

       SCIX_SendString(SCI_A_ID, &buff[0]);

       sprintf(buff,"Test printf %d", temp_test); /*This function do not work and cause

       SCIX_SendString(SCI_A_ID, &buff[0]);

    #if DEBUG_MODE

       SCIX_SendString(SCI_A_ID, "Hello I'm the TI explorer board kit\n");

       SCIX_SendString(SCI_A_ID, "Board IO Init complete\n");

       SCIX_SendString(SCI_A_ID, "Timer Init complete\n");

       SCIX_SendString(SCI_A_ID, "SCI Init complete\n");

    #endif

       return(explorerF28335_setup_status);

    }/**/;

    I noted that the first sprintf go well while the second sprintf has a uncontrollable behavior and block the microcontroller.

    I attach to two images of my debug setup and steps before and after execution.

  • In reply to Andrea Emili78:

    Hi Andrea,

    1. If you remove all the breakpoints, do you still get this emulation error in the console, or do you get a different kind of error like an ITRAP or something similar?

    2. As an experiment, could you try commenting out the first sprintf and see if the second one still fails?

    3. I noticed that your linker command file shows that both the stack and some DMA-related sections are in LS5. Are you using DMARAML5 for the DMA? I just want to make sure there's no possibility that the DMA is corrupting your stack.

    Whitney