Added license for avr/HardwareSerial.

See #1847

1 files changed, 24 insertions, 0 deletions

diff --git a/cores/arduino/HardwareSerial3.cpp b/cores/arduino/HardwareSerial3.cpp
index 0140647..300c4bd 100644
--- a/cores/arduino/HardwareSerial3.cpp
+++ b/cores/arduino/HardwareSerial3.cpp
@@ -1,3 +1,27 @@
+/*
+  HardwareSerial3.cpp - Hardware serial library for Wiring
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  Modified 23 November 2006 by David A. Mellis
+  Modified 28 September 2010 by Mark Sproul
+  Modified 14 August 2012 by Alarus
+  Modified 3 December 2013 by Matthijs Kooijman
+*/
+
 #include "Arduino.h"
 #include "HardwareSerial.h"
 #include "HardwareSerial_private.h"