KW30Z Connectivity CSTACK warning

[lucianfiran]

IAR 7.50;  KW40Z_Connectivity_Software_1.0.1 (KSDK_1.3.0)

If enable graphical stack display from Tool Options...

Got some warnings if set some break points

\platform\devices\MKW30Z4\linker\iar\MKW30Z160xxx4_connectivity.icf

if (isdefinedsymbol(__stack_size__)) {
  define symbol __size_cstack__        = __stack_size__;
} else {
  define symbol __size_cstack__        = 512;
}

if (isdefinedsymbol(__heap_size__)) {
  define symbol __size_heap__          = __heap_size__;
} else {
  define symbol __size_heap__          = 0;
}

...

define block CSTACK    with alignment = 8, size = __size_cstack__   { };
define block HEAP      with alignment = 8, size = __size_heap__     { };

Should the stack be increase and how much ?

Should de heap remain 0 (zero) ?

[jorge_a_vazquez · Accepted solution]

Hi Lucian

No, please don't modify heap, Connectivity framework define his own memory manager, refer to the section 3.3. Memory management of the CONNFWKRM.pdf document, as you can see framework provide a non-fragmenting memory allocation solution, where it defines blocks of memorys as:

         _block_size_  32  _number_of_blocks_    6 _eol_  \
         _block_size_  64  _number_of_blocks_    3 _eol_  \
         _block_size_ 128  _number_of_blocks_    3 _eol_‍‍‍‍‍‍

When a new buffer is requested to be allocated, the framework returns the first available partition block of equal or higher size.

Hope this information helps you
Have a great day,
Jorge Alcala

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