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.
problem solved!
simply start from the demonstration project downloaded from stm32f7 cube. There you'll find all that you need!
The graphic library emWin is incredible and very powerful!
Cheers
Ivano