add "rt" feature

Cargo.toml

@@ -17,3 +17,6 @@ stm32f30x = "0.6.0"
 [dependencies.cast]
 default-features = false
 version = "0.2.2"
+
+[features]
+rt = ["stm32f30x/rt"]
\ No newline at end of file

ci/script.sh

@@ -9,6 +9,7 @@ main() {
             ;;
         *)
             xargo check --target $TARGET
+            xargo check --target $TARGET --features rt
             ;;
     esac
 

src/lib.rs

@@ -5,11 +5,19 @@
 //!
 //! [`embedded-hal`]: https://github.com/japaric/embedded-hal
 //!
+//! # Usage
+//!
+//! To build applications (binary crates) using this crate follow the [cortex-m-quickstart]
+//! instructions and add this crate as a dependency in step number 5 and make sure you enable the
+//! "rt" Cargo feature of this crate.
+//!
+//! [cortex-m-quickstart]: https://docs.rs/cortex-m-quickstart/~0.2.3
+//!
 //! # Examples
 //!
 //! Examples of *using* these abstractions can be found in the documentation of the [`f3`] crate.
 //!
-//! [`f3`]: https://docs.rs/f3/0.5.0/f3/
+//! [`f3`]: https://docs.rs/f3/~0.5.1
 
 #![deny(missing_docs)]
 #![deny(warnings)]