Blink on STM32L011: section `._user_heap_stack' will not fit in region `RAM'

[dusan82]

Arduino Version: 2.3.6 Date: 2025-04-09T11:24:04.835Z CLI Version: 1.2.0
STM32 MCU Based Boards 2.10.1
STM32CubeProgrammer-2.19.0
Ubuntu 24.04.2 LTS

I'm trying to make blink work with Generic STL32L011 series (Generic L011F4Px), specifically STM32L011F4P6. When I try to compile it, I get this error:

Code: Select all

/home/arduino2/.arduino15/packages/STMicroelectronics/tools/xpack-arm-none-eabi-gcc/14.2.1-1.1/bin/../lib/gcc/arm-none-eabi/14.2.1/../../../../arm-none-eabi/bin/ld: /home/arduino2/.cache/arduino/sketches/01993C4702910C0E65592A755C304C9F/Blink.ino.elf section `._user_heap_stack' will not fit in region `RAM'
/home/arduino2/.arduino15/packages/STMicroelectronics/tools/xpack-arm-none-eabi-gcc/14.2.1-1.1/bin/../lib/gcc/arm-none-eabi/14.2.1/../../../../arm-none-eabi/bin/ld: region `RAM' overflowed by 688 bytes
collect2: error: ld returned 1 exit status
exit status 1
Compilation error: exit status 1

How to fix this problem?

(I think I posted in the wrong board, it should be in STM32L0 based boards)

[GonzoG]

Reduce RAM usage (variables).
You can do it by disabling unused peripherals and not needed features.

stm32duino isn't meant to be used on MCUs with low RAM/ROM. It has a lot "bloatware" to make it universal and easy to use.

[dusan82]

I don't use any variable it's just a blink example changing 1 pin.
How to disable unused peripherals and not needed features?

[dusan82]

I managed to make blink work in STM32L011 in CubeIDE. Maybe in the arduino menu this particular chip should be shown as "Generic L011F4Px (unsupported, low memory)" or something like that.

[GonzoG]

No, it shouldn't. You can reduce RAM usage to a few 100 bytes disabling unnecessary things.

Output after compiling blink sketch for L011F4:

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Sketch uses 4556 bytes (27%) of program storage space. Maximum is 16384 bytes.
Global variables use 412 bytes (20%) of dynamic memory, leaving 1636 bytes for local variables. Maximum is 2048 bytes.

Almost everything is available on stm32duino's Wiki: https://github.com/stm32duino/Arduino_Core_STM32/wiki
https://github.com/stm32duino/Arduino_C ... figuration