1 files changed, 57 insertions, 0 deletions
diff --git a/cores/xinput/HardwareSerial3.cpp b/cores/xinput/HardwareSerial3.cpp
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+++ b/cores/xinput/HardwareSerial3.cpp
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+/*
+  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"
+
+// Each HardwareSerial is defined in its own file, since the linker pulls
+// in the entire file when any element inside is used. --gc-sections can
+// additionally cause unused symbols to be dropped, but ISRs have the
+// "used" attribute so are never dropped and they keep the
+// HardwareSerial instance in as well. Putting each instance in its own
+// file prevents the linker from pulling in any unused instances in the
+// first place.
+
+#if defined(HAVE_HWSERIAL3)
+
+ISR(USART3_RX_vect)
+{
+  Serial3._rx_complete_irq();
+}
+
+ISR(USART3_UDRE_vect)
+{
+  Serial3._tx_udr_empty_irq();
+}
+
+HardwareSerial Serial3(&UBRR3H, &UBRR3L, &UCSR3A, &UCSR3B, &UCSR3C, &UDR3);
+
+// Function that can be weakly referenced by serialEventRun to prevent
+// pulling in this file if it's not otherwise used.
+bool Serial3_available() {
+  return Serial3.available();
+}
+
+#endif // HAVE_HWSERIAL3