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58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/*
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twi.h - TWI/I2C library for Wiring & Arduino
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Copyright (c) 2006 Nicholas Zambetti. All right reserved.
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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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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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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 twi_h
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#define twi_h
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#include <inttypes.h>
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//#define ATMEGA8
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#ifndef CPU_FREQ
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#define CPU_FREQ 16000000L
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#endif
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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_BUFFER_LENGTH
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#define TWI_BUFFER_LENGTH 32
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#endif
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#define TWI_READY 0
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#define TWI_MRX 1
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#define TWI_MTX 2
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#define TWI_SRX 3
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#define TWI_STX 4
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void twi_init(void);
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void twi_setAddress(uint8_t);
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uint8_t twi_readFrom(uint8_t, uint8_t*, uint8_t);
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uint8_t twi_writeTo(uint8_t, uint8_t*, uint8_t, uint8_t);
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uint8_t twi_transmit(uint8_t*, uint8_t);
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void twi_attachSlaveRxEvent( void (*)(uint8_t*, int) );
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void twi_attachSlaveTxEvent( void (*)(void) );
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void twi_reply(uint8_t);
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void twi_stop(void);
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void twi_releaseBus(void);
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#endif
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