1 /* 2 * FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU. 3 * Copyright (c) 2006 Christian Walter <[email protected]> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * File: $Id: mbfuncother.c,v 1.8 2006/12/07 22:10:34 wolti Exp $ 29 */ 30 31 /* ----------------------- System includes ----------------------------------*/ 32 #include "stdlib.h" 33 #include "string.h" 34 35 /* ----------------------- Platform includes --------------------------------*/ 36 #include "port.h" 37 38 /* ----------------------- Modbus includes ----------------------------------*/ 39 #include "mb.h" 40 #include "mbframe.h" 41 #include "mbproto.h" 42 #include "mbconfig.h" 43 44 #if MB_FUNC_OTHER_REP_SLAVEID_ENABLED > 0 45 46 /* ----------------------- Static variables ---------------------------------*/ 47 static UCHAR ucMBSlaveID[MB_FUNC_OTHER_REP_SLAVEID_BUF]; 48 static USHORT usMBSlaveIDLen; 49 50 /* ----------------------- Start implementation -----------------------------*/ 51 52 eMBErrorCode 53 eMBSetSlaveID( UCHAR ucSlaveID, BOOL xIsRunning, 54 UCHAR const *pucAdditional, USHORT usAdditionalLen ) 55 { 56 eMBErrorCode eStatus = MB_ENOERR; 57 58 /* the first byte and second byte in the buffer is reserved for 59 * the parameter ucSlaveID and the running flag. The rest of 60 * the buffer is available for additional data. */ 61 if( usAdditionalLen + 2 < MB_FUNC_OTHER_REP_SLAVEID_BUF ) 62 { 63 usMBSlaveIDLen = 0; 64 ucMBSlaveID[usMBSlaveIDLen++] = ucSlaveID; 65 ucMBSlaveID[usMBSlaveIDLen++] = ( UCHAR )( xIsRunning ? 0xFF : 0x00 ); 66 if( usAdditionalLen > 0 ) 67 { 68 memcpy( &ucMBSlaveID[usMBSlaveIDLen], pucAdditional, 69 ( size_t )usAdditionalLen ); 70 usMBSlaveIDLen += usAdditionalLen; 71 } 72 } 73 else 74 { 75 eStatus = MB_ENORES; 76 } 77 return eStatus; 78 } 79 80 eMBException 81 eMBFuncReportSlaveID( UCHAR * pucFrame, USHORT * usLen ) 82 { 83 memcpy( &pucFrame[MB_PDU_DATA_OFF], &ucMBSlaveID[0], ( size_t )usMBSlaveIDLen ); 84 *usLen = ( USHORT )( MB_PDU_DATA_OFF + usMBSlaveIDLen ); 85 return MB_EX_NONE; 86 } 87 88 #endif 89