STM 32 Set min Heap size

how to set the minimum heap size manually in code without cubemX?

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Senior III

Depends on your IDE/toolchain.

For GCC-based toolchain you just edit the _Min_Heap_Size (or similiar) value in the linker script file (the one with .ld extension).

Senior III

The heap is defined in the linker file, and used for malloc()-like functionality. Most linker files come with a heapsize definition of zero.

You are sure you need it ?

If so, you need to setup the size, and the malloc/free like memory adminstration by yourself.

Guru

Keil defines the heap/stack sizes in startup_stm32xyz.s

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arduoAuthor

Associate III

And cube i made the project with cube and now i want to change the heap size but can't find it and i don't want so set it up again from scratch.

Senior III

Don't know recent Keil version, or Cube.

I suggest you start searching with the map file.

Principal

Check the linker configuration file as well.

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