Cargo Features

k22f has no features set by default.

[dependencies]
k22f = { version = "0.1.0", features = ["rt"] }
rt

Enables device of cortex-m-rt

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

cortex-m-rt rt?