80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/*
|
|
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
|
|
|