The STM32H7xx driver is maintained by @dresco and supports boards like the
BTT Scylla,
BTT Octopus Max EZ,
BTT SKR 3 EZ
and some development boards.
The STM32H7xx MCUs are fast, have a rich set of peripherals and a lot of GPIOs making them a good choice for higher end grblHAL controllers.
The STM32U585 driver is maintained by @hoshigarasu and supports the Arduino UNO Q board.
The Arduino UNO Q board is a dual processor board where the main processor runs Linux, grblHAL runs on the second processor.
The HC32F460 experimental driver is maintained by @jake5253 and is targeting the Voxelab Aquila X2 / S2 3D printer controller board.
2026-05-19