Owerwriting max global variable size

Projects Programming
1

I am using a custom STM32 board for my project. The board manager i am using is STM32duino, but it doesnt support the exact chip i am using. it only suports a variant of the same chip that has 8kb Global variable limit instead of 32kb that is actualy available on the chip.

I cant shrink the program, and i do not need to either since i have plenty of unused space on the chip.

I have tried modifiying the setting in board_entry.txt file where maximum_data_size is defined,
but it still shows that Global variables use 11444 bytes (139%) of dynamic memory, Maximum is 8192 bytes.

Where is the maximum sketch size limit stored so i can change it? All other questions on this topic just focus on reducing program size.

2

It might be possible to find an Arduino core that supports the STM32 chip you are using. Try a Google search for the chip designation and 'arduino'.

Can you provide a pointer to the core you have installed?

3

Which chip are you using, and which did you select in the IDE? I don't know a STM32 chip with only 8kB RAM. The minimum I know is 20kB. But of course I don't know all of them - especially the low density ones. The core should in any case support chips with more memory.

4

The STM Official core
GitHub - stm32duino/Arduino_Core_STM32: STM32 core support for Arduino

Look down the page to find the supported boards/chips flavors.

Ask in the forum if you do not find what you need:
Arduino for STM32 - Index page (stm32duino.com)

5

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