Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
What MCU, what board, what kind of project (CubeMX-generated, SW4STM32 generated), what kind of firmware, what are the preceding messages in the console?
We can't help a lot with so few information...
Bernard (Ac6)