Review fixes

Author: maxwase

README.md

@@ -11,7 +11,7 @@ This crate aims to be as flexible as possible to support various HALs and use-ca
 ## Examples
 
 For more examples consider looking into the [examples](https://github.com/maxwase/button-driver/tree/master/examples) folder.
-You can easily flash/rub them using `cargo run` command! Use `trunk serve` to run the wasm example.
+You can easily flash/run them using `cargo run` command! Use `trunk serve` to run the wasm example.
 
 For **ESP32C3** with std:
 

examples/wasm/Cargo.lock

@@ -1,5 +1,5 @@
 //! A WebAssembly example demonstrating button driver usage in the browser.
-//! This example uses the built-in [instant::wasm::Instant] type which wraps `js_sys::Date::now()`.
+//! This example uses the built-in [button_driver::instant::wasm::Instant] type which wraps `js_sys::Date::now()`.
 //!
 //! To run this example:
 //! 1. Install trunk: `cargo install trunk`

examples/wasm/src/lib.rs

@@ -51,8 +51,11 @@ pub mod wasm {
         type Output = Duration;
 
         fn sub(self, rhs: Self) -> Self::Output {
+            // Instant should be monotonic, so self.0 >= rhs.0
             let delta_ms = self.0 - rhs.0;
-            Duration::from_millis(delta_ms as u64)
+            let millis = delta_ms.trunc() as u64;
+            let micros = (delta_ms.fract() * 1000.0) as u64;
+            Duration::from_millis(millis) + Duration::from_micros(micros)
         }
     }