| 1 | /* |
| 2 | HardwareSerial2.cpp - Hardware serial library for Wiring |
| 3 | Copyright (c) 2006 Nicholas Zambetti. All right reserved. |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | This library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Modified 23 November 2006 by David A. Mellis |
| 20 | Modified 28 September 2010 by Mark Sproul |
| 21 | Modified 14 August 2012 by Alarus |
| 22 | Modified 3 December 2013 by Matthijs Kooijman |
| 23 | */ |
| 24 |
|
| 25 | #include "Arduino.h" |
| 26 | #include "HardwareSerial.h" |
| 27 | #include "HardwareSerial_private.h" |
| 28 |
|
| 29 | // Each HardwareSerial is defined in its own file, sine the linker pulls |
| 30 | // in the entire file when any element inside is used. --gc-sections can |
| 31 | // additionally cause unused symbols to be dropped, but ISRs have the |
| 32 | // "used" attribute so are never dropped and they keep the |
| 33 | // HardwareSerial instance in as well. Putting each instance in its own |
| 34 | // file prevents the linker from pulling in any unused instances in the |
| 35 | // first place. |
| 36 |
|
| 37 | #if defined(HAVE_HWSERIAL2) |
| 38 |
|
| 39 | ISR(USART2_RX_vect) |
| 40 | { |
| 41 | Serial2._rx_complete_irq(); |
| 42 | } |
| 43 |
|
| 44 | ISR(USART2_UDRE_vect) |
| 45 | { |
| 46 | Serial2._tx_udr_empty_irq(); |
| 47 | } |
| 48 |
|
| 49 | HardwareSerial Serial2(&UBRR2H, &UBRR2L, &UCSR2A, &UCSR2B, &UCSR2C, &UDR2); |
| 50 |
|
| 51 | // Function that can be weakly referenced by serialEventRun to prevent |
| 52 | // pulling in this file if it's not otherwise used. |
| 53 | bool Serial2_available() { |
| 54 | return Serial2.available(); |
| 55 | } |
| 56 |
|
| 57 | #endif // HAVE_HWSERIAL2 |
| 58 |
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