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/*
  TwoWire.h - TWI/I2C library for Arduino & 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 2012 by Todd Krein (todd@krein.org) to implement repeated starts
  Modified 2020 by Greyson Christoforo (grey@christoforo.net) to implement timeouts
*/

#ifndef TwoWire_h
#define TwoWire_h

#include <inttypes.h>
#include "Stream.h"

#define BUFFER_LENGTH 32

// WIRE_HAS_END means Wire has end()
#define WIRE_HAS_END 1

class TwoWire : public Stream
{
  private:
    static uint8_t rxBuffer[];
    static uint8_t rxBufferIndex;
    static uint8_t rxBufferLength;

    static uint8_t txAddress;
    static uint8_t txBuffer[];
    static uint8_t txBufferIndex;
    static uint8_t txBufferLength;

    static uint8_t transmitting;
    static void (*user_onRequest)(void);
    static void (*user_onReceive)(int);
    static void onRequestService(void);
    static void onReceiveService(uint8_t*, int);
  public:
    TwoWire();
    void begin();
    void begin(uint8_t);
    void begin(int);
    void end();
    void setClock(uint32_t);
    void setWireTimeout(uint32_t timeout = 25000, bool reset_with_timeout = false);
    bool getWireTimeoutFlag(void);
    void clearWireTimeoutFlag(void);
    void beginTransmission(uint8_t);
    void beginTransmission(int);
    uint8_t endTransmission(void);
    uint8_t endTransmission(uint8_t);
    uint8_t requestFrom(uint8_t, uint8_t);
    uint8_t requestFrom(uint8_t, uint8_t, uint8_t);
    uint8_t requestFrom(uint8_t, uint8_t, uint32_t, uint8_t, uint8_t);
    uint8_t requestFrom(int, int);
    uint8_t requestFrom(int, int, int);
    virtual size_t write(uint8_t);
    virtual size_t write(const uint8_t *, size_t);
    virtual int available(void);
    virtual int read(void);
    virtual int peek(void);
    virtual void flush(void);
    void onReceive( void (*)(int) );
    void onRequest( void (*)(void) );

    inline size_t write(unsigned long n) { return write((uint8_t)n); }
    inline size_t write(long n) { return write((uint8_t)n); }
    inline size_t write(unsigned int n) { return write((uint8_t)n); }
    inline size_t write(int n) { return write((uint8_t)n); }
    using Print::write;
};

extern TwoWire Wire;

#endif

	/*
	TwoWire.h - TWI/I2C library for Arduino & 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 2012 by Todd Krein (todd@krein.org) to implement repeated starts
	Modified 2020 by Greyson Christoforo (grey@christoforo.net) to implement timeouts
	*/

	#ifndef TwoWire_h
	#define TwoWire_h

	#include <inttypes.h>
	#include "Stream.h"

	#define BUFFER_LENGTH 32

	// WIRE_HAS_END means Wire has end()
	#define WIRE_HAS_END 1

	class TwoWire : public Stream
	{
	private:
	static uint8_t rxBuffer[];
	static uint8_t rxBufferIndex;
	static uint8_t rxBufferLength;

	static uint8_t txAddress;
	static uint8_t txBuffer[];
	static uint8_t txBufferIndex;
	static uint8_t txBufferLength;

	static uint8_t transmitting;
	static void (*user_onRequest)(void);
	static void (*user_onReceive)(int);
	static void onRequestService(void);
	static void onReceiveService(uint8_t*, int);
	public:
	TwoWire();
	void begin();
	void begin(uint8_t);
	void begin(int);
	void end();
	void setClock(uint32_t);
	void setWireTimeout(uint32_t timeout = 25000, bool reset_with_timeout = false);
	bool getWireTimeoutFlag(void);
	void clearWireTimeoutFlag(void);
	void beginTransmission(uint8_t);
	void beginTransmission(int);
	uint8_t endTransmission(void);
	uint8_t endTransmission(uint8_t);
	uint8_t requestFrom(uint8_t, uint8_t);
	uint8_t requestFrom(uint8_t, uint8_t, uint8_t);
	uint8_t requestFrom(uint8_t, uint8_t, uint32_t, uint8_t, uint8_t);
	uint8_t requestFrom(int, int);
	uint8_t requestFrom(int, int, int);
	virtual size_t write(uint8_t);
	virtual size_t write(const uint8_t *, size_t);
	virtual int available(void);
	virtual int read(void);
	virtual int peek(void);
	virtual void flush(void);
	void onReceive( void (*)(int) );
	void onRequest( void (*)(void) );

	inline size_t write(unsigned long n) { return write((uint8_t)n); }
	inline size_t write(long n) { return write((uint8_t)n); }
	inline size_t write(unsigned int n) { return write((uint8_t)n); }
	inline size_t write(int n) { return write((uint8_t)n); }
	using Print::write;
	};

	extern TwoWire Wire;

	#endif