For guide-level documentation there is The Drone Book.
Drone is split into multiple crates:
drone-core 0.10 0.11 (latest)
The foundational crate. It contains functionality shared by all platforms.
drone-cortex-m 0.10 0.11 (latest)
ARM® Cortex®-M platform crate.
drone-stm32-map 0.10 0.11 (latest)
STM32 peripheral mappings auto-generated from vendor-provided SVD files.
drone-nrf-map 0.11 (latest)
Nordic Semi nRFx peripheral mappings auto-generated from vendor-provided SVD files.
To get help for Drone’s command-line utility or for its subcommands, simply run the following command in the terminal:
$ drone help