root / arduino-1.0 / libraries / Wire / Wire.h @ 58d82c77
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1 | 58d82c77 | Tom Mullins | /*
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2 | TwoWire.h - TWI/I2C library for Arduino & Wiring
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3 | Copyright (c) 2006 Nicholas Zambetti. All right reserved.
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4 | |||
5 | This library is free software; you can redistribute it and/or
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6 | modify it under the terms of the GNU Lesser General Public
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7 | License as published by the Free Software Foundation; either
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8 | version 2.1 of the License, or (at your option) any later version.
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9 | |||
10 | This library is distributed in the hope that it will be useful,
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 | Lesser General Public License for more details.
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14 | |||
15 | You should have received a copy of the GNU Lesser General Public
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16 | License along with this library; if not, write to the Free Software
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17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18 | */
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19 | |||
20 | #ifndef TwoWire_h
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21 | #define TwoWire_h
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22 | |||
23 | #include <inttypes.h> |
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24 | #include "Stream.h" |
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25 | |||
26 | #define BUFFER_LENGTH 32 |
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27 | |||
28 | class TwoWire : public Stream |
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29 | { |
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30 | private:
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31 | static uint8_t rxBuffer[];
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32 | static uint8_t rxBufferIndex;
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33 | static uint8_t rxBufferLength;
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34 | |||
35 | static uint8_t txAddress;
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36 | static uint8_t txBuffer[];
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37 | static uint8_t txBufferIndex;
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38 | static uint8_t txBufferLength;
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39 | |||
40 | static uint8_t transmitting;
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41 | static void (*user_onRequest)(void); |
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42 | static void (*user_onReceive)(int); |
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43 | static void onRequestService(void); |
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44 | static void onReceiveService(uint8_t*, int); |
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45 | public:
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46 | TwoWire(); |
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47 | void begin();
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48 | void begin(uint8_t);
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49 | void begin(int); |
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50 | void beginTransmission(uint8_t);
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51 | void beginTransmission(int); |
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52 | uint8_t endTransmission(void);
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53 | uint8_t requestFrom(uint8_t, uint8_t); |
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54 | uint8_t requestFrom(int, int); |
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55 | virtual size_t write(uint8_t); |
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56 | virtual size_t write(const uint8_t *, size_t);
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57 | virtual int available(void); |
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58 | virtual int read(void); |
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59 | virtual int peek(void); |
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60 | virtual void flush(void); |
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61 | void onReceive( void (*)(int) ); |
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62 | void onRequest( void (*)(void) ); |
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63 | |||
64 | using Print::write; |
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65 | }; |
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66 | |||
67 | extern TwoWire Wire;
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68 | |||
69 | #endif
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