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Added Wire lib for ARM

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This commit is contained in:
Cristian Maglie
2011-10-25 14:33:40 +02:00
parent 278976a587
commit d66490787b
2 changed files with 352 additions and 0 deletions
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91
hardware/sam/libraries/Wire/Wire.h Normal file
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/*
* DueWire.h - TWI/I2C library for Arduino Due
* Copyright (c) 2011 Cristian Maglie <c.maglie@bug.st>.
* 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
*/
#ifndef DueWire_h
#define DueWire_h
#include <inttypes.h>
#include "Stream.h"
#include "twi.h"
#define BUFFER_LENGTH 32
class DueWire: public Stream {
public:
DueWire(Twi *);
void begin();
void begin(uint8_t);
void begin(int);
void beginTransmission(uint8_t);
void beginTransmission(int);
uint8_t endTransmission(void);
uint8_t requestFrom(uint8_t, uint8_t);
uint8_t requestFrom(int, int);
virtual void write(uint8_t);
virtual void write(const char *);
virtual void 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));
void onService(void);
private:
// RX Buffer
uint8_t rxBuffer[BUFFER_LENGTH];
uint8_t rxBufferIndex;
uint8_t rxBufferLength;
// TX Buffer
uint8_t txAddress;
uint8_t txBuffer[BUFFER_LENGTH];
uint8_t txBufferLength;
// Service buffer
uint8_t srvBuffer[BUFFER_LENGTH];
uint8_t srvBufferIndex;
uint8_t srvBufferLength;
// Callback user functions
void (*onRequestCallback)(void);
void (*onReceiveCallback)(int);
// TWI instance
Twi *twi;
// TWI state
static const uint8_t UNINITIALIZED = 0;
static const uint8_t MASTER_IDLE = 1;
static const uint8_t MASTER_SEND = 2;
static const uint8_t MASTER_RECV = 3;
static const uint8_t SLAVE_IDLE = 4;
static const uint8_t SLAVE_RECV = 5;
static const uint8_t SLAVE_SEND = 6;
uint8_t status;
};
extern DueWire Wire;
extern DueWire Wire2;
#endif