Update instructions for device example, closes #73

Cargo.toml

@@ -18,6 +18,8 @@ panic-halt = "0.2.0"
 # alloc-cortex-m = "0.3.5"
 
 # Uncomment for the device example.
+# Update `memory.x`, set target to `thumbv7em-none-eabihf` in `.cargo/config`,
+# and then use `cargo build --examples device` to build it.
 # [dependencies.stm32f3]
 # features = ["stm32f303", "rt"]
 # version = "0.7.1"

examples/device.rs

@@ -5,17 +5,21 @@
 //!
 //! [`svd2rust`]: https://crates.io/crates/svd2rust
 //!
-//! This example depends on the [`stm32f103xx`] crate so you'll have to add it to your Cargo.toml.
+//! This example depends on the [`stm32f3`] crate so you'll have to
+//! uncomment it in your Cargo.toml.
 //!
-//! [`stm32f103xx`]: https://crates.io/crates/stm32f103xx
+//! [`stm32f3`]: https://crates.io/crates/stm32f3
 //!
 //! ```
 //! $ edit Cargo.toml && tail $_
-//! [dependencies.stm32f103xx]
-//! features = ["rt"]
-//! version = "0.10.0"
+//! [dependencies.stm32f3]
+//! features = ["stm32f303", "rt"]
+//! version = "0.7.1"
 //! ```
 //!
+//! You also need to set the build target to thumbv7em-none-eabihf,
+//! typically by editing `.cargo/config` and uncommenting the relevant target line.
+//!
 //! ---
 
 #![no_main]
@@ -27,7 +31,7 @@ extern crate panic_halt;
 use cortex_m::peripheral::syst::SystClkSource;
 use cortex_m_rt::entry;
 use cortex_m_semihosting::hprint;
-use stm32f30x::{interrupt, Interrupt, NVIC};
+use stm32f3::stm32f303::{interrupt, Interrupt, NVIC};
 
 #[entry]
 fn main() -> ! {