mbport.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: mbport.h,v 1.14 2006/06/26 19:26:50 wolti Exp $
  */

#ifndef _MB_PORT_H
#define _MB_PORT_H

#ifdef __cplusplus
PR_BEGIN_EXTERN_C
#endif

/* ----------------------- Type definitions ---------------------------------*/

typedef enum
{
    EV_READY,                   /*!< Startup finished. */
    EV_FRAME_RECEIVED,          /*!< Frame received. */
    EV_EXECUTE,                 /*!< Execute function. */
    EV_FRAME_SENT,              /*!< Frame sent. */
} eMBEventType;

/*! \ingroup modbus
 * \brief Parity used for characters in serial mode.
 *
 * The parity which should be applied to the characters sent over the serial
 * link. Please note that this values are actually passed to the porting
 * layer and therefore not all parity modes might be available.
 */
typedef enum
{
    MB_PAR_NONE,                /*!< No parity. */
    MB_PAR_ODD,                 /*!< Odd parity. */
    MB_PAR_EVEN                 /*!< Even parity. */
} eMBParity;

/* ----------------------- Supporting functions -----------------------------*/
BOOL            xMBPortEventInit( void );

BOOL            xMBPortEventPost( eMBEventType eEvent );

BOOL            xMBPortEventGet(  /*@out@ */ eMBEventType * eEvent );

/* ----------------------- Serial port functions ----------------------------*/

BOOL            xMBPortSerialInit( UCHAR ucPort, ULONG ulBaudRate,
                                   UCHAR ucDataBits, eMBParity eParity );

void            vMBPortClose( void );

void            xMBPortSerialClose( void );

void            vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable );

INLINE BOOL     xMBPortSerialGetByte( CHAR * pucByte );

INLINE BOOL     xMBPortSerialPutByte( CHAR ucByte );

/* ----------------------- Timers functions ---------------------------------*/
BOOL            xMBPortTimersInit( USHORT usTim1Timerout100us );

void            xMBPortTimersClose( void );

INLINE void     vMBPortTimersEnable( void );

INLINE void     vMBPortTimersDisable( void );

/* ----------------------- Callback for the protocol stack ------------------*/

/*!
 * \brief Callback function for the porting layer when a new byte is
 *   available.
 *
 * Depending upon the mode this callback function is used by the RTU or
 * ASCII transmission layers. In any case a call to xMBPortSerialGetByte()
 * must immediately return a new character.
 *
 * \return <code>TRUE</code> if a event was posted to the queue because
 *   a new byte was received. The port implementation should wake up the
 *   tasks which are currently blocked on the eventqueue.
 */
extern          BOOL( *pxMBFrameCBByteReceived ) ( void );

extern          BOOL( *pxMBFrameCBTransmitterEmpty ) ( void );

extern          BOOL( *pxMBPortCBTimerExpired ) ( void );

/* ----------------------- TCP port functions -------------------------------*/
BOOL            xMBTCPPortInit( USHORT usTCPPort );

void            vMBTCPPortClose( void );

void            vMBTCPPortDisable( void );

BOOL            xMBTCPPortGetRequest( UCHAR **ppucMBTCPFrame, USHORT * usTCPLength );

BOOL            xMBTCPPortSendResponse( const UCHAR *pucMBTCPFrame, USHORT usTCPLength );

#ifdef __cplusplus
PR_END_EXTERN_C
#endif
#endif