80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
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/*
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HardwareSerial0.cpp - Hardware serial library for Wiring
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Copyright (c) 2006 Nicholas Zambetti. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Modified 23 November 2006 by David A. Mellis
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Modified 28 September 2010 by Mark Sproul
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Modified 14 August 2012 by Alarus
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Modified 3 December 2013 by Matthijs Kooijman
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*/
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#include "Arduino.h"
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#include "HardwareSerial.h"
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#include "HardwareSerial_private.h"
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// Each HardwareSerial is defined in its own file, sine the linker pulls
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// in the entire file when any element inside is used. --gc-sections can
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// additionally cause unused symbols to be dropped, but ISRs have the
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// "used" attribute so are never dropped and they keep the
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// HardwareSerial instance in as well. Putting each instance in its own
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// file prevents the linker from pulling in any unused instances in the
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// first place.
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#if defined(HAVE_HWSERIAL0)
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#if defined(USART_RX_vect)
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ISR(USART_RX_vect)
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#elif defined(USART0_RX_vect)
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ISR(USART0_RX_vect)
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#elif defined(USART_RXC_vect)
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ISR(USART_RXC_vect) // ATmega8
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#else
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#error "Don't know what the Data Received vector is called for Serial"
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#endif
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{
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Serial._rx_complete_irq();
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}
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#if defined(UART0_UDRE_vect)
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ISR(UART0_UDRE_vect)
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#elif defined(UART_UDRE_vect)
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ISR(UART_UDRE_vect)
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#elif defined(USART0_UDRE_vect)
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ISR(USART0_UDRE_vect)
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#elif defined(USART_UDRE_vect)
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ISR(USART_UDRE_vect)
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#else
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#error "Don't know what the Data Register Empty vector is called for Serial"
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#endif
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{
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Serial._tx_udr_empty_irq();
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}
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#if defined(UBRRH) && defined(UBRRL)
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HardwareSerial Serial(&UBRRH, &UBRRL, &UCSRA, &UCSRB, &UCSRC, &UDR);
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#else
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HardwareSerial Serial(&UBRR0H, &UBRR0L, &UCSR0A, &UCSR0B, &UCSR0C, &UDR0);
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#endif
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// Function that can be weakly referenced by serialEventRun to prevent
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// pulling in this file if it's not otherwise used.
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bool Serial0_available() {
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return Serial.available();
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}
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#endif // HAVE_HWSERIAL0
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