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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 December 2014 by Ivan Grokhotkov (ivan@esp8266.com) - esp8266 support
- Modified April 2015 by Hrsto Gochkov (ficeto@ficeto.com) - alternative esp8266 support
- Modified October 2016 by Marcelo Aquino <marceloaqno@gmail.org> for Raspberry Pi
- */
-
- #ifndef Wire_h
- #define Wire_h
-
- #if !DOXYGEN
- #include <stdint.h>
- #include "Stream.h"
- #include "BCM.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;
-
- public:
- void begin();
- void begin(uint8_t address);
- void begin(int address);
- void end();
- void setClock(uint32_t clock);
-
- void beginTransmission(uint8_t address);
- void beginTransmission(int address);
- uint8_t endTransmission(void);
-
- size_t requestFrom(uint8_t address, size_t size);
- uint8_t requestFrom(uint8_t address, uint8_t quantity);
- uint8_t requestFrom(int address, int quantity);
-
- size_t write(uint8_t data);
- size_t write(const uint8_t *data, size_t quantity);
- int available();
- int read();
- int peek();
- void flush();
-
- 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
- #endif
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