/* 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 */ #ifndef TwoWire_h #define TwoWire_h #include <inttypes.h> #include "Stream.h" #define BUFFER_LENGTH 32 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 setClock(uint32_t); 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(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