twi.h

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/*
 *  Revised for Waspmote by A.Bielsa, 2009
 *
 *  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
 *
 *  This program 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 program 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 program.  If not, see <http://www.gnu.org/licenses/>.
 */
 

#ifndef twi_h
#define twi_h

  #include <inttypes.h>

  //#define ATMEGA8

  #ifndef CPU_FREQ
  #define CPU_FREQ 8000000L
  #endif

  #ifndef TWI_FREQ
  #define TWI_FREQ 100000L
  #endif

  #ifndef TWI_BUFFER_LENGTH
  #define TWI_BUFFER_LENGTH 32
  #endif

  #define TWI_READY 0
  #define TWI_MRX   1
  #define TWI_MTX   2
  #define TWI_SRX   3
  #define TWI_STX   4
  
  void twi_init(void);
  void twi_setAddress(uint8_t);
  uint8_t twi_readFrom(uint8_t, uint8_t*, uint8_t);
  uint8_t twi_writeTo(uint8_t, uint8_t*, uint8_t, uint8_t);
  uint8_t twi_transmit(uint8_t*, uint8_t);
  void twi_attachSlaveRxEvent( void (*)(uint8_t*, int) );
  void twi_attachSlaveTxEvent( void (*)(void) );
  void twi_reply(uint8_t);
  void twi_stop(void);
  void twi_releaseBus(void);
  void twi_close(void);

#endif

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