Expand test coverage and add Codecov reporting

.github/workflows/ci.yml

@@ -44,3 +44,27 @@ jobs:
       - name: STM32 example binaries
         working-directory: embassy-stm32g030f6-examples
         run: cargo check --bins --target thumbv6m-none-eabi
+
+  coverage:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: llvm-tools-preview
+
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@cargo-llvm-cov
+
+      - name: Generate coverage report
+        run: cargo llvm-cov --all-features --lcov --output-path lcov.info
+
+      - name: Upload to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          files: lcov.info
+          token: ${{ secrets.CODECOV_TOKEN }}

README.md

@@ -3,12 +3,13 @@
 [![crates.io](https://img.shields.io/crates/v/bmi323-driver.svg)](https://crates.io/crates/bmi323-driver)
 [![docs.rs](https://img.shields.io/docsrs/bmi323-driver)](https://docs.rs/bmi323-driver)
 [![CI](https://github.com/snabb/bmi323-driver/actions/workflows/ci.yml/badge.svg)](https://github.com/snabb/bmi323-driver/actions/workflows/ci.yml)
+[![codecov](https://codecov.io/gh/snabb/bmi323-driver/graph/badge.svg)](https://codecov.io/gh/snabb/bmi323-driver)
 [![license](https://img.shields.io/crates/l/bmi323-driver.svg)](https://github.com/snabb/bmi323-driver/blob/main/LICENSE)
 [![rust-version](https://img.shields.io/badge/rust-1.85%2B-93450a.svg)](https://www.rust-lang.org/)
 
 `bmi323-driver` is a `no_std` Rust driver for the Bosch BMI323 6-DoF IMU.
 
-The data sheet is available at Bosch Sensortec web site: https://www.bosch-sensortec.com/en/products/motion-sensors/imus/bmi323
+The datasheet is available at Bosch Sensortec web site: https://www.bosch-sensortec.com/en/products/motion-sensors/imus/bmi323
 
 This driver is designed to be transport-agnostic, small, and usable both
 in generic embedded-hal applications and in async Embassy-based firmware.