Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
Install host dependencies.
Import toolchain and SDK.
Create, configure, build and manage apps.
Debug STM32.
You can directly download it from the VSCode marketplace
For more details, visit the Zephyr Workbench
There is a typo in the original post: the attribute used for placing functions in ITCM must be attribute((.itcm_text)), not .itcm_ram. This may explain why the .itcm_text section is empty...