Installing Standard Peripheral Library: Download Fail and Cannot find Locally
I've described possible workaround solution here https://www.openstm32.org/tiki-view_forum_thread.php?comments_parentId=8052&forumId=7
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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.