add LED_BUILTIN definition

ianfixes · ianfixes · commit 771385417564 · 2018-03-27T21:47:40.000-04:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 ### Added
+- Definition of `LED_BUILTIN`, first reported by `dfrencham` on GitHub
 
 ### Changed
 
diff --git a/cpp/arduino/ArduinoDefines.h b/cpp/arduino/ArduinoDefines.h
@@ -89,3 +89,6 @@
 #define TIMER5B 17
 #define TIMER5C 18
 
+#if defined(__AVR_ATmega328P__) || defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega328__) || defined(__AVR_ATmega168__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
+  #define LED_BUILTIN 13
+#endif
