mbfuncother.cpp

00001 /* 
00002  * FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
00003  * Copyright (c) 2006 Christian Walter <wolti@sil.at>
00004  * All rights reserved.
00005  *
00006  * Redistribution and use in source and binary forms, with or without
00007  * modification, are permitted provided that the following conditions
00008  * are met:
00009  * 1. Redistributions of source code must retain the above copyright
00010  *    notice, this list of conditions and the following disclaimer.
00011  * 2. Redistributions in binary form must reproduce the above copyright
00012  *    notice, this list of conditions and the following disclaimer in the
00013  *    documentation and/or other materials provided with the distribution.
00014  * 3. The name of the author may not be used to endorse or promote products
00015  *    derived from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00019  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00020  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00022  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00023  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00024  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00025  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00026  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  *
00028  * File: $Id: mbfuncother.c,v 1.8 2006/12/07 22:10:34 wolti Exp $
00029  */
00030 
00031 /* ----------------------- System includes ----------------------------------*/
00032 #include "stdlib.h"
00033 #include "string.h"
00034 
00035 /* ----------------------- Platform includes --------------------------------*/
00036 #include "port.h"
00037 
00038 /* ----------------------- Modbus includes ----------------------------------*/
00039 #include "mb.h"
00040 #include "mbframe.h"
00041 #include "mbproto.h"
00042 #include "mbconfig.h"
00043 
00044 #if MB_FUNC_OTHER_REP_SLAVEID_ENABLED > 0
00045 
00046 /* ----------------------- Static variables ---------------------------------*/
00047 static UCHAR    ucMBSlaveID[MB_FUNC_OTHER_REP_SLAVEID_BUF];
00048 static USHORT   usMBSlaveIDLen;
00049 
00050 /* ----------------------- Start implementation -----------------------------*/
00051 
00052 eMBErrorCode
00053 eMBSetSlaveID( UCHAR ucSlaveID, BOOL xIsRunning,
00054                UCHAR const *pucAdditional, USHORT usAdditionalLen )
00055 {
00056     eMBErrorCode    eStatus = MB_ENOERR ;
00057 
00058     /* the first byte and second byte in the buffer is reserved for
00059      * the parameter ucSlaveID and the running flag. The rest of
00060      * the buffer is available for additional data. */
00061     if( usAdditionalLen + 2 < MB_FUNC_OTHER_REP_SLAVEID_BUF )
00062     {
00063         usMBSlaveIDLen = 0;
00064         ucMBSlaveID[usMBSlaveIDLen++] = ucSlaveID;
00065         ucMBSlaveID[usMBSlaveIDLen++] = ( UCHAR )( xIsRunning ? 0xFF : 0x00 );
00066         if( usAdditionalLen > 0 )
00067         {
00068             memcpy( &ucMBSlaveID[usMBSlaveIDLen], pucAdditional,
00069                     ( size_t )usAdditionalLen );
00070             usMBSlaveIDLen += usAdditionalLen;
00071         }
00072     }
00073     else
00074     {
00075         eStatus = MB_ENORES ;
00076     }
00077     return eStatus;
00078 }
00079 
00080 eMBException
00081 eMBFuncReportSlaveID( UCHAR * pucFrame, USHORT * usLen )
00082 {
00083     memcpy( &pucFrame[MB_PDU_DATA_OFF], &ucMBSlaveID[0], ( size_t )usMBSlaveIDLen );
00084     *usLen = ( USHORT )( MB_PDU_DATA_OFF + usMBSlaveIDLen );
00085     return MB_EX_NONE;
00086 }
00087 
00088 #endif