mbascii.h

modbus的例程,非常不错,大家可以

 /*
  * FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
  * Copyright (C) 2006 Christian Walter <[e-mail]>
  *
  * 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
  *
  * File: $Id: mbascii.h,v 1.7 2006/06/18 09:57:03 wolti Exp $
  */

#ifndef _MB_ASCII_H
#define _MB_ASCII_H

#ifdef __cplusplus
PR_BEGIN_EXTERN_C
#endif

#if MB_ASCII_ENABLED > 0
eMBErrorCode    eMBASCIIInit( UCHAR slaveAddress, UCHAR ucPort,
                              ULONG ulBaudRate, eMBParity eParity );
void            eMBASCIIStart( void );
void            eMBASCIIStop( void );

eMBErrorCode    eMBASCIIReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame,
                                 USHORT * pusLength );
eMBErrorCode    eMBASCIISend( UCHAR slaveAddress, const UCHAR * pucFrame,
                              USHORT usLength );
BOOL            xMBASCIIReceiveFSM( void );
BOOL            xMBASCIITransmitFSM( void );
BOOL            xMBASCIITimerT1SExpired( void );
#endif

#ifdef __cplusplus
PR_END_EXTERN_C
#endif
#endif