Merge pull request #104 from tweedegolf/feedback-updates

Feedback updates

book/src/foreign-function-interface.md

@@ -13,12 +13,12 @@ Use a CRC checksum function written in C in a Rust program
 
 ## Steps
 
-1. Add the `cc` build dependency, by adding to `Crate.toml` the lines:
+1. Add the `cc` build dependency, by adding to `Cargo.toml` the lines:
     ```toml
     [build-dependencies]
     cc = "1.0"
     ```
-2. Create `build.rs` with contents
+2. Create `build.rs` (in the same directory as `Cargo.toml`) with contents
     ```rust
     extern crate cc;
 
@@ -29,7 +29,8 @@ Use a CRC checksum function written in C in a Rust program
     }
     ```
 
-    This will find your c code, compile it, and link it into the executable rust produces
+    `build.rs` is a build script that cargo runs before it compiles your crate.
+    This will find your c code, compile it, and link it into the executable rust produces.
 3. In `main.rs`, define an extern (fill in the argument and return types)
     ```rust
     extern "C" {

exercises/1-course-introduction/1-introduction/2-embedded/.cargo/config.toml

@@ -1,6 +1,6 @@
 [target.'cfg(all(target_arch = "arm", target_os = "none"))']
-# runner = "probe-rs run --chip nRF52833_xxAA --catch-reset --catch-hardfault --allow-erase-all"
-runner = "probe-rs run --chip nRF52833_xxAA --catch-reset --catch-hardfault --allow-erase-all --probe 0d28:0204:990636020005282085E7C008F3731B68000000006E052820"
+runner = "probe-rs run --chip nRF52833_xxAA --catch-reset --catch-hardfault --allow-erase-all"
+# runner = "probe-rs run --chip nRF52833_xxAA --catch-reset --catch-hardfault --allow-erase-all --probe 0d28:0204:990636020005282085E7C008F3731B68000000006E052820"
 
 rustflags = [
   "-C", "link-arg=-Tlink.x",