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.
There is a LED on PD_2 and I've got it working in mbed.
I can get the onboard LED to blink by using an example from ST's downloaded CubeF4 files but any attempt to change to other pins and it programs but nothing happens.