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/*
NewSoftSerial.h - Multi-instance software serial library
Copyright (c) 2006 David A. Mellis. All rights reserved.
-- Interrupt-driven receive and other improvements by ladyada
-- Tuning, circular buffer, derivation from class Print,
multi-instance support, porting to 8MHz processors,
various optimizations, PROGMEM delay tables, inverse logic and
direct port writing by Mikal Hart
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
The latest version of this library can always be found at
http://arduiniana.org.
*/
#ifndef NewSoftSerial_h
#define NewSoftSerial_h
#include <inttypes.h>
#include "Print.h"
/******************************************************************************
* Definitions
******************************************************************************/
#define _NewSS_MAX_RX_BUFF 64 // RX buffer size
#define _NewSS_VERSION 10 // software version of this library
#ifndef GCC_VERSION
#define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
#endif
class NewSoftSerial : public Print
{
private:
// per object data
uint8_t _receivePin;
uint8_t _receiveBitMask;
volatile uint8_t *_receivePortRegister;
uint8_t _transmitBitMask;
volatile uint8_t *_transmitPortRegister;
uint16_t _rx_delay_centering;
uint16_t _rx_delay_intrabit;
uint16_t _rx_delay_stopbit;
uint16_t _tx_delay;
uint16_t _buffer_overflow:1;
uint16_t _inverse_logic:1;
// static data
static char _receive_buffer[_NewSS_MAX_RX_BUFF];
static volatile uint8_t _receive_buffer_tail;
static volatile uint8_t _receive_buffer_head;
static NewSoftSerial *active_object;
// private methods
void recv();
bool activate();
virtual size_t write(uint8_t byte);
uint8_t rx_pin_read();
void tx_pin_write(uint8_t pin_state);
void setTX(uint8_t transmitPin);
void setRX(uint8_t receivePin);
// private static method for timing
static inline void tunedDelay(uint16_t delay);
public:
// public methods
NewSoftSerial(uint8_t receivePin, uint8_t transmitPin, bool inverse_logic = false);
~NewSoftSerial();
void begin(long speed);
void end();
int read();
uint8_t available(void);
bool active() { return this == active_object; }
bool overflow() { bool ret = _buffer_overflow; _buffer_overflow = false; return ret; }
static int library_version() { return _NewSS_VERSION; }
static void enable_timer0(bool enable);
void flush();
// public only for easy access by interrupt handlers
static inline void handle_interrupt();
};
// Arduino 0012 workaround
#undef int
#undef char
#undef long
#undef byte
#undef float
#undef abs
#undef round
#endif
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