Revamp code, add CI, linting, etc

.clang-format

@@ -0,0 +1,13 @@
+---
+Language: Cpp
+BasedOnStyle: LLVM
+UseTab: ForIndentation
+TabWidth: 4
+IndentWidth: 4
+BreakBeforeBraces: Allman
+ColumnLimit: 0
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+SortIncludes: false
+...

.github/workflows/ci.yml

@@ -0,0 +1,74 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  format:
+    name: clang-format
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - name: Check formatting
+        uses: jidicula/clang-format-action@v4.13.0
+        with:
+          clang-format-version: "17"
+          check-path: "."
+
+  lint:
+    name: arduino-lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - name: Lint library
+        uses: arduino/arduino-lint-action@v3
+        with:
+          # Use "submit" until the library is accepted into the Library Manager
+          # index; switch to "update" once it is listed.
+          library-manager: submit
+          compliance: strict
+
+  compile:
+    name: compile examples
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        fqbn:
+          - arduino:avr:uno
+          - arduino:avr:mega
+    steps:
+      - uses: actions/checkout@v7
+      - name: Compile example sketches
+        uses: arduino/compile-sketches@v1
+        with:
+          fqbn: ${{ matrix.fqbn }}
+          platforms: |
+            - name: arduino:avr
+          libraries: |
+            - source-path: ./
+            - source-url: https://github.com/madleech/Auto485.git
+          sketch-paths: |
+            - examples/hello_world
+            - examples/inputs_and_outputs
+            - examples/many_inputs
+            - examples/many_outputs
+            - examples/multiple_nodes
+            - examples/multiple_nodes_inputting
+            - examples/rs485_cmri_hello_world
+            - examples/rs485_rx_and_tx
+            - examples/susic_256_outputs
+
+  test:
+    name: native unit tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - uses: actions/setup-python@v7
+        with:
+          python-version: "3.x"
+      - name: Install PlatformIO
+        run: pip install --upgrade platformio
+      - name: Run tests
+        run: pio test -e native

.gitignore

@@ -163,3 +163,15 @@ pip-log.txt
 
 # Mac crap
 .DS_Store
+
+
+#############
+## PlatformIO
+#############
+
+.pio/
+.pioenvs/
+.piolibdeps/
+.vscode/
+*.o
+*.a