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92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
/*
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* DueWire.h - TWI/I2C library for Arduino Due
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* Copyright (c) 2011 Cristian Maglie <c.maglie@bug.st>.
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* All right reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef DueWire_h
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#define DueWire_h
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#include <inttypes.h>
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#include "Stream.h"
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#include "twi.h"
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#define BUFFER_LENGTH 32
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class DueWire: public Stream {
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public:
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DueWire(Twi *);
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void begin();
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void begin(uint8_t);
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void begin(int);
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void beginTransmission(uint8_t);
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void beginTransmission(int);
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uint8_t endTransmission(void);
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uint8_t requestFrom(uint8_t, uint8_t);
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uint8_t requestFrom(int, int);
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virtual void write(uint8_t);
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virtual void write(const char *);
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virtual void write(const uint8_t *, size_t);
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virtual int available(void);
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virtual int read(void);
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virtual int peek(void);
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virtual void flush(void);
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void onReceive(void(*)(int));
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void onRequest(void(*)(void));
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void onService(void);
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private:
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// RX Buffer
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uint8_t rxBuffer[BUFFER_LENGTH];
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uint8_t rxBufferIndex;
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uint8_t rxBufferLength;
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// TX Buffer
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uint8_t txAddress;
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uint8_t txBuffer[BUFFER_LENGTH];
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uint8_t txBufferLength;
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// Service buffer
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uint8_t srvBuffer[BUFFER_LENGTH];
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uint8_t srvBufferIndex;
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uint8_t srvBufferLength;
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// Callback user functions
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void (*onRequestCallback)(void);
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void (*onReceiveCallback)(int);
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// TWI instance
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Twi *twi;
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// TWI state
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static const uint8_t UNINITIALIZED = 0;
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static const uint8_t MASTER_IDLE = 1;
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static const uint8_t MASTER_SEND = 2;
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static const uint8_t MASTER_RECV = 3;
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static const uint8_t SLAVE_IDLE = 4;
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static const uint8_t SLAVE_RECV = 5;
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static const uint8_t SLAVE_SEND = 6;
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uint8_t status;
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};
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extern DueWire Wire;
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extern DueWire Wire2;
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#endif
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