LAUNCHXL-CC1350: Moving a specific array to GPRAM

Hi Clement, 

The link in M-W's response below has paragraph at the end:

Dynamic GPRAM

In this mode, the cache will be used as RAM only when we need it. At all other times, the cache will operate as normal. When the cache is disabled and the memory is used as RAM, the current consumption will increase as described in the Configure the Cache as GPRAM section. When the cache is not configured as RAM but runs as usual, the power consumption is not increased.

How do you reconcile that with your comment "To complete, you cannot dynamically chose to activate or deactivate the GPRAM."

Notice: I'm using the array I'm going to store in the RAM for a couple of seconds per day ! I really don't want neither the GPRAM nor the info in this array anytime else :)

Hi Clement, 

I'm having a hard time trying to move the array to GPRAM, my linker file is giving syntax errors, the file is here:

/*
 */

/* Entry Point */
ENTRY(ResetISR)

MEMORY
{
    /* Flash Size 128 KB minus the CCA area below (88 bytes) */
    FLASH (RX) : ORIGIN = 0x00000000, LENGTH = 0x0001FFA8
    /* Customer Configuration Area and Bootloader Backdoor configuration  in flash, up to 88 bytes */
    FLASH_CCFG (RX) : ORIGIN = 0x0001FFA8, LENGTH = 88
    /* RAM Size 20KB */
    SRAM (RWX) : ORIGIN = 0x20000000, LENGTH = 0x00005000
    /* Application can use GPRAM region as RAM if cache is disabled in CCFG */
    GPRAM (RWX) : ORIGIN = 0x11000000, LENGTH = 0x00002000
}

/*. Highest address of the stack. Used in startup file .*/
_estack = ORIGIN(SRAM) + LENGTH(SRAM); /* End of SRAM */

/*. Generate a link error if heap and stack don’t fit into RAM .*/
_Min_Heap_Size = 0;
_Min_Stack_Size = 0x400;

SECTIONS
{
    .text :
    {
        _text = .;
        KEEP(*(.vectors))
        *(.text*)
        *(.rodata*)
        _etext = .;
    } > FLASH = 0

    .data :
    {
        _data = .;
        *(vtable)
        *(.data*)
        _edata = .;
    } > SRAM AT > FLASH
    _ldata = LOADADDR(.data);

    .ARM.exidx :
    {
        *(.ARM.exidx*)
    } > FLASH

    .bss :
    {
        _bss = .;
        *(.bss*)
        *(COMMON)
        _ebss = .;
    } > SRAM

    _end = .;  /* End of the .bss segment. */

    /* These symbols are used by the stack check library. */
    _stack = .;
    _stack_origin = ORIGIN(SRAM) + LENGTH(SRAM);
    _heap = _stack;
    _eheap = _stack_origin;

    .ccfg :
    {
        KEEP(*(.ccfg))
    } > FLASH_CCFG

    /* User_heap_stack section, used to check that there is enough RAM left */
    ._user_heap_stack :
    {
      . = ALIGN(4);
      . = . + _Min_Heap_Size;
      . = . + _Min_Stack_Size;
      . = ALIGN(4);
    } > SRAM
    
    .gpram :
    {
    } > GPRAM
}

when I insert:

reorganized_into_gpram
{
    .bss.BlackImage
}

it either gives syntax error or "cannot find object Back image", the links above does not show how to move a specific array to the GPRAM, but the .bss section as a whole.