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Can't initalize data in bank2 at flash time.

JulienD
Senior
Posted on January 10, 2017 at 11:11

Hi,

I'm trying to put some data in bank2 of an stm32L152ZET6. This data is initialized like this:

__attribute__((__section__('.arrayFlash')))         uint32_t flashData[200] = { 8, 8 , 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

__attribute__((__section__('.arrayFlash')))         uint32_t flashStrings[100] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

Here's the link file

/* Entry Point */

ENTRY(Reset_Handler)

/* Highest address of the user mode stack */

_estack = 0x20014000;    /* end of RAM */

/* Generate a link error if heap and stack don't fit into RAM */

_Min_Heap_Size = 0x200;      /* required amount of heap  */

_Min_Stack_Size = 0x400; /* required amount of stack */

/* Specify the memory areas */

MEMORY

{

FLASH (rx)             : ORIGIN = 0x8007000, LENGTH = 228K

FLASH_BANK2 (rx)     : ORIGIN = 0x8040000, LENGTH = 256K

EEPROM_BANK1 (rx)    : ORIGIN = 0x8080000, LENGTH = 8K

EEPROM_BANK2 (rx)    : ORIGIN = 0x8082000, LENGTH = 8K

RAM (xrw)              : ORIGIN = 0x20000000, LENGTH = 80K

}

/* Define output sections */

SECTIONS

{

  /* The startup code goes first into FLASH */

  .isr_vector :

  {

    . = ALIGN(4);

    KEEP(*(.isr_vector)) /* Startup code */

    . = ALIGN(4);

  } >RAM AT> FLASH

  /* The program code and other data goes into FLASH */

  .text :

  {

    . = ALIGN(4);

    *(.text)           /* .text sections (code) */

    *(.text*)          /* .text* sections (code) */

    *(.glue_7)         /* glue arm to thumb code */

    *(.glue_7t)        /* glue thumb to arm code */

    *(.eh_frame)

    KEEP (*(.init))

    KEEP (*(.fini))

    . = ALIGN(4);

    _etext = .;        /* define a global symbols at end of code */

  } >FLASH

  /* Constant data goes into FLASH */

  .rodata :

  {

    . = ALIGN(4);

    *(.rodata)         /* .rodata sections (constants, strings, etc.) */

    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */

    . = ALIGN(4);

  } >FLASH

  .ARM.extab   : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH

  .ARM : {

    __exidx_start = .;

    *(.ARM.exidx*)

    __exidx_end = .;

  } >FLASH

  .preinit_array     :

  {

    PROVIDE_HIDDEN (__preinit_array_start = .);

    KEEP (*(.preinit_array*))

    PROVIDE_HIDDEN (__preinit_array_end = .);

  } >FLASH

  .init_array :

  {

    PROVIDE_HIDDEN (__init_array_start = .);

    KEEP (*(SORT(.init_array.*)))

    KEEP (*(.init_array*))

    PROVIDE_HIDDEN (__init_array_end = .);

  } >FLASH

  .fini_array :

  {

    PROVIDE_HIDDEN (__fini_array_start = .);

    KEEP (*(SORT(.fini_array.*)))

    KEEP (*(.fini_array*))

    PROVIDE_HIDDEN (__fini_array_end = .);

  } >FLASH

  /* used by the startup to initialize data */

  _sidata = LOADADDR(.data);

  /* Initialized data sections goes into RAM, load LMA copy after code */

  .data :

  {

    . = ALIGN(4);

    _sdata = .;        /* create a global symbol at data start */

    *(.data)           /* .data sections */

    *(.data*)          /* .data* sections */

    . = ALIGN(4);

    _edata = .;        /* define a global symbol at data end */

  } >RAM AT> FLASH

 

  /* Uninitialized data section */

  . = ALIGN(4);

  .bss :

  {

    /* This is used by the startup in order to initialize the .bss secion */

    _sbss = .;         /* define a global symbol at bss start */

    __bss_start__ = _sbss;

    *(.bss)

    *(.bss*)

    *(COMMON)

    . = ALIGN(4);

    _ebss = .;         /* define a global symbol at bss end */

    __bss_end__ = _ebss;

  } >RAM

  /* User_heap_stack section, used to check that there is enough RAM left */

  ._user_heap_stack :

  {

    . = ALIGN(8);

    PROVIDE ( end = . );

    PROVIDE ( _end = . );

    . = . + _Min_Heap_Size;

    . = . + _Min_Stack_Size;

    . = ALIGN(8);

  } >RAM

 .arrayFlash :

    {

    . = ALIGN(64*4);

        *(.arrayFlash)

    . = ALIGN(64*4);

    } >FLASH_BANK2

 

  /* Remove information from the standard libraries */

  /DISCARD/ :

  {

    libc.a ( * )

    libm.a ( * )

    libgcc.a ( * )

  }

  .ARM.attributes 0 : { *(.ARM.attributes) }

}

When I open the map file, It seems that the arrays are put in the right bank:

*(.arrayFlash)

 .arrayFlash    0x08040000      0x4b0 Src/main.o

                0x08040000                flashData

                0x08040320                flashStrings

                0x08040500                . = ALIGN (0x100)

 *fill*         0x080404b0       0x50

But when I open the device with st-link utility, the data is not initialized at those adresses.

I tried the same thing but with data in bank1 like below, and it works.

 .arrayFlash :

    {

    . = ALIGN(64*4);

        *(.arrayFlash)

    . = ALIGN(64*4);

    } >FLASH

 

Does anybody have an idea of what may happen?

Thanks

Julien

1 ACCEPTED SOLUTION

Accepted Solutions
JulienD
Senior
Posted on January 12, 2017 at 11:29

All right, I upgraded to SW4STM32 1.12 and it works now.

Thanks for your help.

View solution in original post

3 REPLIES 3
Posted on January 10, 2017 at 17:27

Is the data correctly in the .HEX file? Did you use the ST-LINK Utilities to program the device? Which version?

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Up vote any posts that you find helpful, it shows what's working..
Posted on January 10, 2017 at 17:42

Good question! the data is correct in the hex file.

That means that the flash process is wrong.

I use SW4STM32 tools suite. I suspect that the flash process is done by openocd. ( Open On-Chip Debugger 0.10.0-dev-00270-g7ec9836 (2016-05-18-14:26) )

If I flash with STlink utility it works.

JulienD
Senior
Posted on January 12, 2017 at 11:29

All right, I upgraded to SW4STM32 1.12 and it works now.

Thanks for your help.