Integrating Semihosting(STM32F407) and STM32CubeMX generated code(SW4STM)
search semihosting in this forum and you will see lot of them.
One of them is this
http://www.openstm32.org/tiki-view_forum_thread.php?comments_parentId=4210
Related content
Development tools for Zephyr on STM32
Workbench 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.