twif.h

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00001 #ifndef _DEV_TWIF_H_
00002 #define _DEV_TWIF_H_
00003 
00004 /*
00005  * Copyright (C) 2001-2005 by egnite Software GmbH. All rights reserved.
00006  *
00007  * Redistribution and use in source and binary forms, with or without
00008  * modification, are permitted provided that the following conditions
00009  * are met:
00010  *
00011  * 1. Redistributions of source code must retain the above copyright
00012  *    notice, this list of conditions and the following disclaimer.
00013  * 2. Redistributions in binary form must reproduce the above copyright
00014  *    notice, this list of conditions and the following disclaimer in the
00015  *    documentation and/or other materials provided with the distribution.
00016  * 3. Neither the name of the copyright holders nor the names of
00017  *    contributors may be used to endorse or promote products derived
00018  *    from this software without specific prior written permission.
00019  *
00020  * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS
00021  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00022  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
00023  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE
00024  * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
00025  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
00026  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
00027  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
00028  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00029  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
00030  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00031  * SUCH DAMAGE.
00032  *
00033  * For additional information see http://www.ethernut.de/
00034  */
00035 
00036 /*
00037  * $Log: twif.h,v $
00038  * Revision 1.2  2005/10/24 10:56:30  haraldkipp
00039  * Added const modifier to transmit data pointer in TwMasterTransact().
00040  *
00041  * Revision 1.1.1.1  2003/05/09 14:41:09  haraldkipp
00042  * Initial using 3.2.1
00043  *
00044  * Revision 1.2  2003/03/31 14:53:23  harald
00045  * Prepare release 3.1
00046  *
00047  */
00048 
00049 #include <sys/types.h>
00050 
00051 #define TWI_SETSPEED        0x0401  
00052 #define TWI_GETSPEED        0x0402  
00053 #define TWI_SETSLAVEADDRESS 0x0403  
00054 #define TWI_GETSLAVEADDRESS 0x0404  
00055 #define TWI_SETSTATUS       0x0409  
00056 #define TWI_GETSTATUS       0x040a  
00059 #define TWERR_OK        0   
00060 #define TWERR_TIMEOUT       1   
00061 #define TWERR_BUS       2   
00062 #define TWERR_IF_LOCKED     3   
00063 #define TWERR_SLA_NACK      4   
00064 #define TWERR_DATA_NACK     5   
00067 #define TWSLA_MIN       17  
00071 #define TWSLA_MAX       79  
00075 #define TWSLA_BCAST     0   
00076 #define TWSLA_HOST      16  
00077 #define TWSLA_DEFAULT       193 
00079 extern int TwInit(u_char sla);
00080 extern int TwIOCtl(int req, void *conf);
00081 
00082 extern int TwMasterTransact(u_char sla, CONST void *txdata, u_short txlen, void *rxdata, u_short rxsiz, u_long tmo);
00083 extern int TwMasterError(void);
00084 
00085 extern int TwSlaveListen(u_char *sla, void *rxdata, u_short rxsiz, u_long tmo);
00086 extern int TwSlaveRespond(void *txdata, u_short txlen, u_long tmo);
00087 extern int TwSlaveError(void);
00088 
00089 
00090 #endif

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