Use GitHub Actions for continuous integration with firmware builds (#43)

* Add a basic Github Action for continuous integration

This github action script installs the required
dependencies before building both SINE and FOC
variants. Unit tests are compiled and run though the
unit tests are expected to fail.

* Update readme to use Github Action for build status

Use relative paths to the github action for continuous
integration builds rather than Travis-CI.

* Disable unit test running in CI until they can be fixed

The unit tests report several failures. Don't run them
until an effort can be spent on fixing them.

* Disable unit test build in CI until they can be fixed

* Publish CI build binaries

This updates the Github Action CI build
process to "upload" the binaries from the
SINE and FOC builds. These will be retained
for 90 days by default.

Update the git checkout action to the latest
release as everything is being tested together.

Tests:
 - Verified after push

* Don't use wildcard patterns for uploads

.github/workflows/CI-build.yml

@@ -0,0 +1,63 @@
+name: CI
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    name: build-linux
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install build package dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install gcc-arm-none-eabi
+
+      - name: Build dependencies
+        run: |
+          echo "Number of processors:" `nproc`
+          make get-deps -j `nproc`
+
+      - name: Build SINE firmware
+        run: |
+          make CONTROL=SINE clean all
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: SINE firmware binary
+          path: stm32_sine.bin
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: SINE firmware hex
+          path: stm32_sine.hex
+
+      - name: Build FOC firmware
+        run: |
+          make CONTROL=FOC clean all
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: FOC firmware binary
+          path: stm32_foc.bin
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: FOC firmware hex
+          path: stm32_foc.hex
+
+# Unit tests are currently broken so don't build and run them for now
+#- name: Build unit tests on host
+#        run: |
+#          make -C test
+#
+#      - name: Run unit tests on host
+#        run: |
+#          test/test_sine
+

README.md

@@ -1,4 +1,4 @@
-[![Build Status](https://travis-ci.com/jsphuebner/stm32-sine.svg?branch=master)](https://travis-ci.com/jsphuebner/stm32-sine)
+[![Build status](../../actions/workflows/CI-build.yml/badge.svg)](../../actions/workflows/CI-build.yml)
 
 # stm32-sine
 Main firmware of the Huebner inverter project