Quadrotor

/*

  HardwareSerial.h - 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 28 September 2010 by Mark Sproul

*/

#ifndef HardwareSerial_h

#define HardwareSerial_h

#include <inttypes.h>

#include "Stream.h"

struct ring_buffer;

class HardwareSerial : public Stream

{

  private:

    ring_buffer *_rx_buffer;

    ring_buffer *_tx_buffer;

    volatile uint8_t *_ubrrh;

    volatile uint8_t *_ubrrl;

    volatile uint8_t *_ucsra;

    volatile uint8_t *_ucsrb;

    volatile uint8_t *_udr;

    uint8_t _rxen;

    uint8_t _txen;

    uint8_t _rxcie;

    uint8_t _udrie;

    uint8_t _u2x;

  public:

    HardwareSerial(ring_buffer *rx_buffer, ring_buffer *tx_buffer,

      volatile uint8_t *ubrrh, volatile uint8_t *ubrrl,

      volatile uint8_t *ucsra, volatile uint8_t *ucsrb,

      volatile uint8_t *udr,

      uint8_t rxen, uint8_t txen, uint8_t rxcie, uint8_t udrie, uint8_t u2x);

    void begin(unsigned long);

    void end();

    virtual int available(void);

    virtual int peek(void);

    virtual int read(void);

    virtual void flush(void);

    virtual size_t write(uint8_t);

    using Print::write; // pull in write(str) and write(buf, size) from Print

};

#if defined(UBRRH) || defined(UBRR0H)

  extern HardwareSerial Serial;

#elif defined(USBCON)

  #include "USBAPI.h"

//  extern HardwareSerial Serial_;  

#endif

#if defined(UBRR1H)

  extern HardwareSerial Serial1;

#endif

#if defined(UBRR2H)

  extern HardwareSerial Serial2;

#endif

#if defined(UBRR3H)

  extern HardwareSerial Serial3;

#endif

extern void serialEventRun(void) __attribute__((weak));

#endif