Demo project showing my setup for STM32 microcontrollers without STM32CubeIDE, but with the HAL drivers. This demo targets the STM32 NUCLEO-L432KC board (STM32L432KC), which contains an ARM Cortex-M4 CPU.

• Modular setup: HAL drivers are fetched from upstream repositories and are separate from application code.
• CMake build system: transparent and easy to use with your favorite editor or CI/CD.
• No need to install a GUI IDE or other unnecessary dependencies: use only what you want/need.

Example Output:

STM32 NUCLEO-K432KC Demo Application Version 1.0
Build date: Nov 13 2023 20:39:27
GCC 13.2.0 Newlib 4.3.0

Hello World!

You'll need the standard GCC toolchain, arm-none-eabi. Download either directly from Arm or install using your system package manager, e.g.,

sudo apt-get install gcc-arm-none-eabi

To upload the final binary to the board I use the STM32 programming toolset. To start a GDB server, I use st-util --connect-under-reset. This makes the most sense when using the on-board ST-Link on the NUCLEO development board.

However, sometimes it's also nice to have a more capable graphical debugger, for which I use Ozone with a SEGGER J-Link Plus connected over SWD. I also tried enabling tracing via the SWO pin, but could not get it to work. Ozone can also directly flash the STM32L432KC, so no need for the ST-Link tools.

Make sure you cloned the whole repository including the submodules.

git clone --recursive https://github.com/stgloorious/stm32-nucleo-l432kc-demo.git

To compile, run CMake

cmake -B build && make -C build

To flash the program to the board, run

make -C build flash

The linker script is taken from

STM32CubeL4/Projects/NUCLEO-L432KC/Templates/STM32CubeIDE/STM32L432KCUX_FLASH.ld

It looks like only one label (end of .text) had to be added for newlib compatibility.

The system_stm32l4x.c file can also be found in third_party/STM32CubeL4/Projects/NUCLEO-L432KC/.