struct sFlashParam
{
    uint16_t customerID;
    uint32_t mainCounter;        
    uint32_t CWcounter;
    uint8_t  mode;                
    uint8_t  channel;             
    uint8_t  meter_type;
       …и так далее.
}

      
WriteToFlash(0x0FE00000, (uint32_t*)&flashParam1);

void WriteToFlash(uint32_t address, uint32_t *data)
{
    uint32_t *addr = (uint32_t *) address;  //(uint32_t *)0x0FE00000;
    MSC_Init();
    MSC_ErasePage(addr);
    MSC_WriteWord(addr, data, sizeof(data));
    MSC_Deinit();
}

void WriteToFlash(uint32_t address, uint32_t *data, uint32_t size )
{
    uint32_t *addr = (uint32_t *) address;  
    MSC_Init();
    MSC_ErasePage(addr);
    MSC_WriteWord(addr, data, size);
    MSC_Deinit();

}

void ReadFromFlash(uint32_t offset, uint32_t *data, uint32_t size)
{
    int i;
    uint32_t *addr;
    for (i = 0; i < size; i++ )
    {
      addr = (uint32_t *)(offset  + i*4);
      data[i] = *addr;
    }
}

WriteToFlash(0x0FE00000, (uint32_t*)&flashParam1, sizeof (struct sFlashParam1));

ReadFromFlash(0x0FE00000, (uint32_t*)&flashParam1, sizeof (struct sFlashParam1));

struct mystruct* const ptr = (struct mystruct*)0x12345678;

int32_t a;
sizeof(a);
int32_t TotalK = 0;

for(int i=0;i<sizeof(a);i++)
  TotalK = i*4;

    
       memcpy(&flashParam1, 0x0FE00000, sizeof (struct sFlashParam1));

flashParam1 = *(struct sFlashParam1*)0x0FE00000;

flashParam1 = *(struct sFlashParam1*)0x0FE00000;

void WriteToFlash(const uint32_t address, void const *data, uint32_t size)
{
    size = 4 * ((size + 3)/4); // always divisable by 4
    MSC_Init();
    MSC_ErasePage((const uint32_t *)address);
    MSC_WriteWord((const uint32_t *)address, data, size);
    MSC_Deinit();
}

WriteToFlash(USERDATA_BASE, &my_struct, sizeof(my_struct));

  RW_IRAM1 0x20000000 0x00004000  {; RW data
  *(ram_code, +First)             ; flash erase/write functions
   .ANY (+RW +ZI)
  }

const MyType MyStruct __attribute__((section("MYDATA"), used)) = {<init fields>};

LR_IROM_SETS   (0xFE00000) 0x200  {; User settings in the user    
  ER_IROM_SETS (0x0FE00000) 0x200  {; flash page
    *(MYDATA)
  }
}

/*
*****************************************************************************
**
** File : efm32_flash.ld
**
** Abstract : Linker script for EFM32TG842F32 Device with
** 32KByte FLASH, 4KByte RAM
**
** Set heap size, stack size and stack location according
** to application requirements.
**
** Set memory bank area and size if external memory is used.
**
** Target : Energy Micro EFM32
**
** Environment : Atollic TrueSTUDIO®
**
** Distribution: The file is distributed “as is,” without any warranty
** of any kind.
**
** ©Copyright Atollic AB.
** You may use this file as-is or modify it according to the needs of your
** project. This file may only be built (assembled or compiled and linked)
** using the Atollic TrueSTUDIO® product. The use of this file together
** with other tools than Atollic TrueSTUDIO® is not permitted.
**
*****************************************************************************
*/

/* Entry Point */
ENTRY(Reset_Handler)

/* Highest address of the user mode stack */
_estack = 0x20001000; /* end of 4K RAM */

/* Generate a link error if heap and stack don't fit into RAM */
_Min_Heap_Size = 0; /* required amount of heap */
_Min_Stack_Size = 0x80; /* required amount of stack */

/* Specify the memory areas */
MEMORY
{
FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 32K
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 4K
MEMORY_B1 (rx) : ORIGIN = 0x60000000, LENGTH = 0K
}

/* Define output sections */
SECTIONS
{
/* The startup code goes first into FLASH */
.isr_vector :
{
. = ALIGN(4);
KEEP(*(.isr_vector)) /* Startup code */
. = ALIGN(4);
} >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(4);
PROVIDE ( end = . );
PROVIDE ( _end = . );
. = . + _Min_Heap_Size;
. = . + _Min_Stack_Size;
. = ALIGN(4);
} >RAM

/* MEMORY_bank1 section, code must be located here explicitly */
/* Example: extern int foo(void) __attribute__ ((section (".mb1text"))); */
.memory_b1_text :
{
*(.mb1text) /* .mb1text sections (code) */
*(.mb1text*) /* .mb1text* sections (code) */
*(.mb1rodata) /* read-only data (constants) */
*(.mb1rodata*)
} >MEMORY_B1

/* Remove information from the standard libraries */
/DISCARD/ :
{
libc.a ( * )
libm.a ( * )
libgcc.a ( * )
}

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

/* 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)
*(ram_code)  /* <--------------------- */

. = ALIGN(4);
_ebss = .; /* define a global symbol at bss end */
__bss_end__ = _ebss;
} >RAM

    .data :
    {
        . = ALIGN(4);
        _sdata = .;                /* start of .data label (in RAM, VMA) */
        *(.data)
        *(.data.*)
        *(.ram_code.*)  /* <--------------------- */
    } > RAM AT > FLASH

void func(size_t size)
{
   char buffer[size];
   ...
}