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84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
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/*
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Wire.h - TWI/I2C library file for Wiring
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Part of the Wiring project - http://wiring.org.co
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Copyright (c) 2004-2005 Hernando Barragan
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Wire TWI/I2C library by Nicholas Zambetti
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*/
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#ifndef Wire_h
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#define Wire_h
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#include <inttypes.h>
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#ifndef TWI_FREQ
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#define TWI_FREQ 100000L
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#endif
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#ifndef TWI_BUFFERSIZE
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#define TWI_BUFFERSIZE 32
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#endif
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class Wire
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{
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private:
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static volatile uint8_t _state;
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static uint8_t _slarw;
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static uint8_t _masterBuffer[TWI_BUFFERSIZE];
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static uint8_t _masterBufferLength;
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static volatile uint8_t _masterBufferIndex;
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static void (*Wire::_onSlaveTransmit)(void);
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static void (*Wire::_onSlaveReceive)(int);
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static uint8_t _txBuffer[TWI_BUFFERSIZE];
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static volatile uint8_t _txBufferIndex;
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static volatile uint8_t _txBufferLength;
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static uint8_t _rxBuffer[TWI_BUFFERSIZE];
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static volatile uint8_t _rxBufferIndex;
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uint8_t readFrom(uint8_t, uint8_t*, uint8_t);
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uint8_t writeTo(uint8_t, uint8_t*, uint8_t, uint8_t);
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static void reply(uint8_t);
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static void stop(void);
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static void releaseBus(void);
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static void interruptLogic(void);
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public:
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Wire(uint8_t);
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uint8_t read(int);
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void readBytes(int, uint8_t*, int);
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void readBytes(int, char*, int);
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void write(int, int);
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void writeBytes(int, uint8_t*, int);
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void writeBytes(int, char*);
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void transmit(uint8_t);
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void transmitBytes(uint8_t*, uint8_t);
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void transmitBytes(char*);
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uint8_t receive(void);
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void receiveBytes(uint8_t*);
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void receiveBytes(char*);
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void onDataIn( void (*)(int) );
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void onDataOut( void (*)(void) );
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};
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#endif
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