Use GitHub Actions for continuous integration

.codespellrc

@@ -0,0 +1,7 @@
+# See: https://github.com/codespell-project/codespell#using-a-config-file
+[codespell]
+# In the event of a false positive, add the problematic word, in all lowercase, to a comma-separated list here:
+ignore-words-list = hart,pullrequest
+check-filenames =
+check-hidden =
+skip = ./.git,./firmwares/arduinoISP,./firmwares/wifishield,./bootloaders

.github/dependabot.yml

@@ -0,0 +1,10 @@
+# See: https://docs.github.com/en/github/administering-a-repository/configuration-options-for-dependency-updates#about-the-dependabotyml-file
+version: 2
+
+updates:
+  # Configure check for outdated GitHub Actions actions in workflows.
+  # See: https://docs.github.com/en/github/administering-a-repository/keeping-your-actions-up-to-date-with-dependabot
+  - package-ecosystem: github-actions
+    directory: / # Check the repository's workflows under /.github/workflows/
+    schedule:
+      interval: daily

.github/workflows/check-arduino.yml

@@ -0,0 +1,27 @@
+name: Check Arduino
+
+# See: https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
+on:
+  push:
+  pull_request:
+  schedule:
+    # Run every Tuesday at 8 AM UTC to catch breakage caused by new rules added to Arduino Lint.
+    - cron: "0 8 * * TUE"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Arduino Lint
+        uses: arduino/arduino-lint-action@v1
+        with:
+          compliance: specification
+          # Always use this setting for official repositories. Remove for 3rd party projects.
+          official: true
+          project-type: platform

.github/workflows/compile-platform-examples.yml

@@ -0,0 +1,206 @@
+name: Compile Examples
+
+# See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows
+on:
+  push:
+    paths:
+      - ".github/workflows/compile-platform-examples.ya?ml"
+      - "cores/**"
+      - "libraries/**"
+      - "variants/**"
+      - "boards.txt"
+      - "platform.txt"
+  pull_request:
+    paths:
+      - ".github/workflows/compile-platform-examples.ya?ml"
+      - "cores/**"
+      - "libraries/**"
+      - "variants/**"
+      - "boards.txt"
+      - "platform.txt"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  build:
+    name: ${{ matrix.board.fqbn }}
+    runs-on: ubuntu-latest
+
+    env:
+      SKETCHES_REPORTS_PATH: sketches-reports
+
+    strategy:
+      fail-fast: false
+
+      matrix:
+        board:
+          - fqbn: arduino:avr:yun
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:uno
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:diecimila:cpu=atmega328
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:diecimila:cpu=atmega168
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:nano:cpu=atmega328
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:nano:cpu=atmega328old
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:nano:cpu=atmega168
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:mega:cpu=atmega2560
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:mega:cpu=atmega1280
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:megaADK
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:leonardo
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:leonardoeth
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:micro
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:esplora
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:mini:cpu=atmega328
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:mini:cpu=atmega168
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:ethernet
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:fio
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:bt:cpu=atmega328
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:bt:cpu=atmega168
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:LilyPadUSB
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:lilypad:cpu=atmega328
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:lilypad:cpu=atmega168
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:pro:cpu=16MHzatmega328
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:pro:cpu=8MHzatmega328
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:pro:cpu=16MHzatmega168
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:pro:cpu=8MHzatmega168
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:atmegang:cpu=atmega168
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:atmegang:cpu=atmega8
+            serial: true
+            softwareserial: false
+          - fqbn: arduino:avr:robotControl
+            serial: true
+            softwareserial: false
+          - fqbn: arduino:avr:robotMotor
+            serial: true
+            softwareserial: false
+          - fqbn: arduino:avr:gemma
+            serial: false
+            softwareserial: false
+          - fqbn: arduino:avr:circuitplay32u4cat
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:yunmini
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:chiwawa
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:one
+            serial: true
+            softwareserial: true
+          - fqbn: arduino:avr:unowifi
+            serial: true
+            softwareserial: true
+
+        # Make board type-specific customizations to the matrix jobs
+        include:
+          - board:
+              # Boards with Serial interface
+              serial: true
+            # Compile these sketches in addition to the ones compiled for all boards
+            serial-sketch-paths: |
+              - libraries/EEPROM/examples/eeprom_crc
+              - libraries/EEPROM/examples/eeprom_get
+              - libraries/EEPROM/examples/eeprom_put
+              - libraries/EEPROM/examples/eeprom_read
+              - libraries/SPI
+              - libraries/Wire
+          - board:
+              serial: false
+            serial-sketch-paths: ""
+          - board:
+              # Boards compatible with the SoftwareSerial library
+              softwareserial: true
+            softwareserial-sketch-paths: |
+              - libraries/SoftwareSerial
+          - board:
+              softwareserial: false
+            softwareserial-sketch-paths: ""
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Compile examples
+        uses: arduino/compile-sketches@v1
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          fqbn: ${{ matrix.board.fqbn }}
+          platforms: |
+            # Use Boards Manager to install the latest release of the platform to get the toolchain.
+            - name: arduino:avr
+            # Overwrite the Boards Manager installation with the platform from the repository.
+            - source-path: ./
+              name: arduino:avr
+          sketch-paths: |
+            # Compile these sketches for all boards
+            - libraries/EEPROM/examples/eeprom_clear
+            - libraries/EEPROM/examples/eeprom_iteration
+            - libraries/EEPROM/examples/eeprom_update
+            - libraries/EEPROM/examples/eeprom_write
+            # Board-specific sketches
+            ${{ matrix.serial-sketch-paths }}
+            ${{ matrix.softwareserial-sketch-paths }}
+          enable-deltas-report: true
+          sketches-report-path: ${{ env.SKETCHES_REPORTS_PATH }}
+
+      - name: Save sketches report as workflow artifact
+        uses: actions/upload-artifact@v2
+        with:
+          if-no-files-found: error
+          path: ${{ env.SKETCHES_REPORTS_PATH }}
+          name: ${{ env.SKETCHES_REPORTS_PATH }}

.github/workflows/report-size-deltas.yml

@@ -0,0 +1,24 @@
+name: Report Size Deltas
+
+# See: https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
+on:
+  push:
+    paths:
+      - ".github/workflows/report-size-deltas.yml"
+  schedule:
+    # Run at the minimum interval allowed by GitHub Actions.
+    # Note: GitHub Actions periodically has outages which result in workflow failures.
+    # In this event, the workflows will start passing again once the service recovers.
+    - cron: "*/5 * * * *"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  report:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Comment size deltas reports to PRs
+        uses: arduino/report-size-deltas@v1
+        with:
+          # The name of the workflow artifact created by the sketch compilation workflow
+          sketches-reports-source: sketches-reports

.github/workflows/spell-check.yml

@@ -0,0 +1,22 @@
+name: Spell Check
+
+# See: https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
+on:
+  push:
+  pull_request:
+  schedule:
+    # Run every Tuesday at 8 AM UTC to catch new misspelling detections resulting from dictionary updates.
+    - cron: "0 8 * * TUE"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  spellcheck:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Spell check
+        uses: codespell-project/actions-codespell@master

README.md

@@ -0,0 +1,8 @@
+# Arduino AVR Boards
+
+[![Check Arduino status](https://github.com/arduino/ArduinoCore-avr/actions/workflows/check-arduino.yml/badge.svg)](https://github.com/arduino/ArduinoCore-avr/actions/workflows/check-arduino.yml)
+[![Compile Examples status](https://github.com/arduino/ArduinoCore-avr/actions/workflows/compile-platform-examples.yml/badge.svg)](https://github.com/arduino/ArduinoCore-avr/actions/workflows/compile-platform-examples.yml)
+[![Spell Check status](https://github.com/arduino/ArduinoCore-avr/actions/workflows/spell-check.yml/badge.svg)](https://github.com/arduino/ArduinoCore-avr/actions/workflows/spell-check.yml)
+
+This repository contains the source code and configuration files of the Arduino AVR Boards
+[platform](https://arduino.github.io/arduino-cli/latest/platform-specification/).

cores/arduino/HardwareSerial.cpp

@@ -219,7 +219,7 @@ void HardwareSerial::flush()
 	  _tx_udr_empty_irq();
   }
   // If we get here, nothing is queued anymore (DRIE is disabled) and
-  // the hardware finished tranmission (TXC is set).
+  // the hardware finished transmission (TXC is set).
 }
 
 size_t HardwareSerial::write(uint8_t c)

cores/arduino/HardwareSerial.h

@@ -32,7 +32,7 @@
 // using a ring buffer (I think), in which head is the index of the location
 // to which to write the next incoming character and tail is the index of the
 // location from which to read.
-// NOTE: a "power of 2" buffer size is reccomended to dramatically
+// NOTE: a "power of 2" buffer size is recommended to dramatically
 //       optimize all the modulo operations for ring buffers.
 // WARNING: When buffer sizes are increased to > 256, the buffer index
 // variables are automatically increased in size, but the extra

cores/arduino/HardwareSerial_private.h

@@ -63,7 +63,7 @@
 #endif
 #endif // !defined TXC0
 
-// Check at compiletime that it is really ok to use the bit positions of
+// Check at compile time that it is really ok to use the bit positions of
 // UART0 for the other UARTs as well, in case these values ever get
 // changed for future hardware.
 #if defined(TXC1) && (TXC1 != TXC0 || RXEN1 != RXEN0 || RXCIE1 != RXCIE0 || \

cores/arduino/Print.h

@@ -59,7 +59,7 @@ class Print
     }
 
     // default to zero, meaning "a single write may block"
-    // should be overriden by subclasses with buffering
+    // should be overridden by subclasses with buffering
     virtual int availableForWrite() { return 0; }
 
     size_t print(const __FlashStringHelper *);

cores/arduino/Stream.h

@@ -25,7 +25,7 @@
 #include <inttypes.h>
 #include "Print.h"
 
-// compatability macros for testing
+// compatibility macros for testing
 /*
 #define   getInt()            parseInt()
 #define   getInt(ignore)    parseInt(ignore)

cores/arduino/USBAPI.h

@@ -32,7 +32,7 @@ typedef unsigned long u32;
 
 #include "Arduino.h"
 
-// This definitions is usefull if you want to reduce the EP_SIZE to 16
+// This definitions is useful if you want to reduce the EP_SIZE to 16
 // at the moment only 64 and 16 as EP_SIZE for all EPs are supported except the control endpoint
 #ifndef USB_EP_SIZE
 #define USB_EP_SIZE 64

cores/arduino/WString.h

@@ -95,7 +95,7 @@ class String
 
 	// returns true on success, false on failure (in which case, the string
 	// is left unchanged).  if the argument is null or invalid, the
-	// concatenation is considered unsucessful.
+	// concatenation is considered unsuccessful.
 	unsigned char concat(const String &str);
 	unsigned char concat(const char *cstr);
 	unsigned char concat(char c);
@@ -152,7 +152,7 @@ class String
 	unsigned char startsWith(const String &prefix, unsigned int offset) const;
 	unsigned char endsWith(const String &suffix) const;
 
-	// character acccess
+	// character access
 	char charAt(unsigned int index) const;
 	void setCharAt(unsigned int index, char c);
 	char operator [] (unsigned int index) const;

cores/arduino/new.cpp

@@ -18,7 +18,7 @@
 
 #include "new.h"
 
-// The C++ spec dicates that allocation failure should cause the
+// The C++ spec dictates that allocation failure should cause the
 // (non-nothrow version of the) operator new to throw an exception.
 // Since we expect to have exceptions disabled, it would be more
 // appropriate (and probably standards-compliant) to terminate instead.