[example] Add Feather M4 blink example

.github/workflows/linux.yml

@@ -92,7 +92,7 @@ jobs:
       - name: Examples SAMD Devices
         if: always()
         run: |
-          (cd examples && ../tools/scripts/examples_compile.py samd samd21_xplained_pro)
+          (cd examples && ../tools/scripts/examples_compile.py feather_m4 samd samd21_xplained_pro)
       - name: Examples SAMG Devices
         if: always()
         run: |

examples/feather_m4/blink/main.cpp

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2016-2017, Niklas Hauser
+ *
+ * This file is part of the modm project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+// ----------------------------------------------------------------------------
+
+#include <modm/board.hpp>
+
+using namespace Board;
+
+int
+main()
+{
+	initialize();
+
+	// Use the logging streams to print some messages.
+	// Change MODM_LOG_LEVEL above to enable or disable these messages
+	MODM_LOG_DEBUG   << "debug"   << modm::endl;
+	MODM_LOG_INFO    << "info"    << modm::endl;
+	MODM_LOG_WARNING << "warning" << modm::endl;
+	MODM_LOG_ERROR   << "error"   << modm::endl;
+
+	uint32_t counter(0);
+
+	while (true)
+	{
+		Led::toggle();
+		modm::delay(500ms);
+
+		MODM_LOG_INFO << "loop: " << counter++ << modm::endl;
+	}
+
+	return 0;
+}
+

examples/feather_m4/blink/project.xml

@@ -0,0 +1,10 @@
+<library>
+  <extends>modm:feather-m4</extends>
+  <options>
+    <option name="modm:build:build.path">../../../build/feather_m4/blink</option>
+  </options>
+  <modules>
+    <module>modm:build:scons</module>
+    <module>modm:architecture:delay</module>
+  </modules>
+</library>