| 1 | /* |
| 2 | HardwareSerial0.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_HWSERIAL0) |
| 38 |
|
| 39 | #if defined(USART_RX_vect) |
| 40 | ISR(USART_RX_vect) |
| 41 | #elif defined(USART0_RX_vect) |
| 42 | ISR(USART0_RX_vect) |
| 43 | #elif defined(USART_RXC_vect) |
| 44 | ISR(USART_RXC_vect) // ATmega8 |
| 45 | #else |
| 46 | #error "Don't know what the Data Received vector is called for Serial" |
| 47 | #endif |
| 48 | { |
| 49 | Serial._rx_complete_irq(); |
| 50 | } |
| 51 |
|
| 52 | #if defined(UART0_UDRE_vect) |
| 53 | ISR(UART0_UDRE_vect) |
| 54 | #elif defined(UART_UDRE_vect) |
| 55 | ISR(UART_UDRE_vect) |
| 56 | #elif defined(USART0_UDRE_vect) |
| 57 | ISR(USART0_UDRE_vect) |
| 58 | #elif defined(USART_UDRE_vect) |
| 59 | ISR(USART_UDRE_vect) |
| 60 | #else |
| 61 | #error "Don't know what the Data Register Empty vector is called for Serial" |
| 62 | #endif |
| 63 | { |
| 64 | Serial._tx_udr_empty_irq(); |
| 65 | } |
| 66 |
|
| 67 | #if defined(UBRRH) && defined(UBRRL) |
| 68 | HardwareSerial Serial(&UBRRH, &UBRRL, &UCSRA, &UCSRB, &UCSRC, &UDR); |
| 69 | #else |
| 70 | HardwareSerial Serial(&UBRR0H, &UBRR0L, &UCSR0A, &UCSR0B, &UCSR0C, &UDR0); |
| 71 | #endif |
| 72 |
|
| 73 | // Function that can be weakly referenced by serialEventRun to prevent |
| 74 | // pulling in this file if it's not otherwise used. |
| 75 | bool Serial0_available() { |
| 76 | return Serial.available(); |
| 77 | } |
| 78 |
|
| 79 | #endif // HAVE_HWSERIAL0 |
| 80 |
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