source: arduino-1-6-7/trunk/fuentes/arduino-ide-amd64/hardware/arduino/avr/libraries/Wire/src/Wire.h @ 4837

Last change on this file since 4837 was 4837, checked in by daduve, 3 years ago

Adding new version

File size: 2.6 KB
Line 
1/*
2  TwoWire.h - TWI/I2C library for Arduino & Wiring
3  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
4
5  This library is free software; you can redistribute it and/or
6  modify it under the terms of the GNU Lesser General Public
7  License as published by the Free Software Foundation; either
8  version 2.1 of the License, or (at your option) any later version.
9
10  This library is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  Lesser General Public License for more details.
14
15  You should have received a copy of the GNU Lesser General Public
16  License along with this library; if not, write to the Free Software
17  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
18
19  Modified 2012 by Todd Krein (todd@krein.org) to implement repeated starts
20*/
21
22#ifndef TwoWire_h
23#define TwoWire_h
24
25#include <inttypes.h>
26#include "Stream.h"
27
28#define BUFFER_LENGTH 32
29
30// WIRE_HAS_END means Wire has end()
31#define WIRE_HAS_END 1
32
33class TwoWire : public Stream
34{
35  private:
36    static uint8_t rxBuffer[];
37    static uint8_t rxBufferIndex;
38    static uint8_t rxBufferLength;
39
40    static uint8_t txAddress;
41    static uint8_t txBuffer[];
42    static uint8_t txBufferIndex;
43    static uint8_t txBufferLength;
44
45    static uint8_t transmitting;
46    static void (*user_onRequest)(void);
47    static void (*user_onReceive)(int);
48    static void onRequestService(void);
49    static void onReceiveService(uint8_t*, int);
50  public:
51    TwoWire();
52    void begin();
53    void begin(uint8_t);
54    void begin(int);
55    void end();
56    void setClock(uint32_t);
57    void beginTransmission(uint8_t);
58    void beginTransmission(int);
59    uint8_t endTransmission(void);
60    uint8_t endTransmission(uint8_t);
61    uint8_t requestFrom(uint8_t, uint8_t);
62    uint8_t requestFrom(uint8_t, uint8_t, uint8_t);
63        uint8_t requestFrom(uint8_t, uint8_t, uint32_t, uint8_t, uint8_t);
64    uint8_t requestFrom(int, int);
65    uint8_t requestFrom(int, int, int);
66    virtual size_t write(uint8_t);
67    virtual size_t write(const uint8_t *, size_t);
68    virtual int available(void);
69    virtual int read(void);
70    virtual int peek(void);
71    virtual void flush(void);
72    void onReceive( void (*)(int) );
73    void onRequest( void (*)(void) );
74
75    inline size_t write(unsigned long n) { return write((uint8_t)n); }
76    inline size_t write(long n) { return write((uint8_t)n); }
77    inline size_t write(unsigned int n) { return write((uint8_t)n); }
78    inline size_t write(int n) { return write((uint8_t)n); }
79    using Print::write;
80};
81
82extern TwoWire Wire;
83
84#endif
85
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