Add github workflows.

These will run clippy, check code formatting, and build both ThreadX and a Rust binary.

.github/workflows/build.yml

@@ -0,0 +1,54 @@
+# Copyright (c) 2023 Ferrous Systems
+# SPDX-License-Identifier: MIT OR Apache-2.0
+
+name: workflow-build-everything
+run-name: Build Everything
+on: [push]
+jobs:
+  job-build-threadx-staticlib:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+        with:
+          submodules: 'true'
+      - name: Install tools
+        run: |
+          sudo apt-get update -y && sudo apt-get -y install cmake gcc gcc-arm-none-eabi build-essential ninja-build
+      - name: Compile ThreadX for Cortex-M4
+        run: |
+          cd threadx
+          cmake -Bbuild_m4 -GNinja -DCMAKE_TOOLCHAIN_FILE=cmake/cortex_m4.cmake
+          cmake --build ./build_m4
+      - name: Upload staticlib
+        uses: actions/upload-artifact@master
+        with:
+          name: threadx-cm4
+          path: threadx/build_m4/libthreadx.a
+  job-build-demo-app:
+    runs-on: ubuntu-latest
+    needs: job-build-threadx-staticlib
+    steps:
+      - name: Install tools
+        run: |
+          sudo apt-get update -y && sudo apt-get -y install gcc-arm-none-eabi
+      - name: Checkout repo
+        uses: actions/checkout@v4
+        with:
+          submodules: 'true'
+      - name: Download staticlib
+        uses: actions/download-artifact@master
+        with:
+          name: threadx-cm4
+          path: threadx/build/libthreadx.a # Where build.rs expects it
+      - name: Add rustup target
+        run: |
+          rustup target add thumbv7em-none-eabi
+      - name: Check Demo App
+        run: |
+          cd demo-app
+          cargo check --target=thumbv7em-none-eabi
+      - name: Build Demo App
+        run: |
+          cd demo-app
+          cargo build --target=thumbv7em-none-eabi --release

.github/workflows/clippy.yml

@@ -0,0 +1,24 @@
+# Copyright (c) 2023 Ferrous Systems
+# SPDX-License-Identifier: MIT OR Apache-2.0
+
+name: workflow-code-analysis
+run-name: Run code analysis
+on: [push]
+jobs:
+  job-clippy-demo-app:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - name: Install tools
+        run: |
+          sudo apt-get update -y && sudo apt-get -y install gcc-arm-none-eabi
+      - name: Add rustup target
+        run: |
+          rustup target add thumbv7em-none-eabi
+      - name: Check Clippy
+        env:
+          RUSTFLAGS: "-Dwarnings"
+        run: |
+          cd demo-app
+          cargo clippy --all-features

.github/workflows/format.yml

@@ -0,0 +1,18 @@
+# Copyright (c) 2023 Ferrous Systems
+# SPDX-License-Identifier: MIT OR Apache-2.0
+
+# Builds ThreadX and then our Rust program
+
+name: workflow-code-format
+run-name: Check code formatting
+on: [push]
+jobs:
+  job-format-demo-app:
+      runs-on: ubuntu-latest
+      steps:
+        - name: Checkout repo
+          uses: actions/checkout@v4
+        - name: Check Formatting
+          run: |
+            cd demo-app
+            cargo fmt -- --check

demo-app/.cargo/config.toml

@@ -12,4 +12,4 @@ rustflags = [
 
 [build]
 # cross-compile to this target
-target = "thumbv7em-none-eabihf" # = ARM Cortex-M4 with FPU
+target = "thumbv7em-none-eabi" # = ARM Cortex-M4 with soft-float