152 lines
5.4 KiB
C
152 lines
5.4 KiB
C
/*
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* SPDX-FileCopyrightText: 2006 Christian Walter
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* SPDX-FileContributor: 2016-2021 Espressif Systems (Shanghai) CO LTD
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*/
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/*
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* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
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* Copyright (c) 2006 Christian Walter <wolti@sil.at>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* File: $Id: mbfuncother.c,v 1.8 2006/12/07 22:10:34 wolti Exp $
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*/
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/* ----------------------- System includes ----------------------------------*/
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#include "stdlib.h"
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#include "string.h"
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/* ----------------------- Platform includes --------------------------------*/
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#include "port.h"
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/* ----------------------- Modbus includes ----------------------------------*/
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#include "mb.h"
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#include "mb_m.h"
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#include "mbframe.h"
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#include "mbproto.h"
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#include "mbconfig.h"
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#if MB_SLAVE_RTU_ENABLED || MB_SLAVE_ASCII_ENABLED || MB_TCP_ENABLED
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#if MB_FUNC_OTHER_REP_SLAVEID_ENABLED
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#define MB_PDU_BYTECNT_OFF ( MB_PDU_DATA_OFF + 0 )
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#define MB_PDU_FUNC_DATA_OFF ( MB_PDU_DATA_OFF + 1 )
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/* ----------------------- Static variables ---------------------------------*/
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static UCHAR ucMBSlaveID[MB_FUNC_OTHER_REP_SLAVEID_BUF] = {0};
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static USHORT usMBSlaveIDLen;
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/* ----------------------- Start implementation -----------------------------*/
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eMBException prveMBError2Exception( eMBErrorCode eErrorCode );
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eMBMasterReqErrCode
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eMBMasterReqReportSlaveID( UCHAR ucSndAddr, LONG lTimeOut )
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{
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UCHAR *ucMBFrame;
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eMBMasterReqErrCode eErrStatus = MB_MRE_NO_ERR;
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if ( ucSndAddr > MB_MASTER_TOTAL_SLAVE_NUM ) eErrStatus = MB_MRE_ILL_ARG;
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else if ( xMBMasterRunResTake( lTimeOut ) == FALSE ) eErrStatus = MB_MRE_MASTER_BUSY;
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else
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{
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vMBMasterGetPDUSndBuf(&ucMBFrame);
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vMBMasterSetDestAddress(ucSndAddr);
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ucMBFrame[MB_PDU_FUNC_OFF] = MB_FUNC_OTHER_REPORT_SLAVEID;
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vMBMasterSetPDUSndLength( 1 );
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( void ) xMBMasterPortEventPost( EV_MASTER_FRAME_TRANSMIT | EV_MASTER_TRANS_START );
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eErrStatus = eMBMasterWaitRequestFinish( );
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}
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return eErrStatus;
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}
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eMBException
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eMBMasterFuncReportSlaveID( UCHAR * pucFrame, USHORT * usLen )
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{
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UCHAR ucByteCount = 0;
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eMBException eStatus = MB_EX_NONE;
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eMBErrorCode eRegStatus;
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if( *usLen <= ( MB_FUNC_OTHER_REP_SLAVEID_BUF - 2 ) )
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{
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ucByteCount = ( UCHAR )( pucFrame[MB_PDU_BYTECNT_OFF] );
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// Transfer data from command buffer.
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eRegStatus = eMBMasterRegCommonCB( &pucFrame[MB_PDU_FUNC_DATA_OFF], 0, ucByteCount);
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/* If an error occured convert it into a Modbus exception. */
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if( eRegStatus != MB_ENOERR )
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{
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eStatus = prveMBError2Exception( eRegStatus );
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}
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}
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else
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{
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/* Can't be a valid request because the length is incorrect. */
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eStatus = MB_EX_ILLEGAL_DATA_VALUE;
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}
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return eStatus;
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}
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eMBErrorCode
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eMBSetSlaveID( UCHAR ucSlaveID, BOOL xIsRunning,
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UCHAR const *pucAdditional, USHORT usAdditionalLen )
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{
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eMBErrorCode eStatus = MB_ENOERR;
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/* the first byte and second byte in the buffer is reserved for
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* the parameter ucSlaveID and the running flag. The rest of
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* the buffer is available for additional data. */
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if( usAdditionalLen + 2 < MB_FUNC_OTHER_REP_SLAVEID_BUF )
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{
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usMBSlaveIDLen = 0;
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ucMBSlaveID[usMBSlaveIDLen++] = ucSlaveID;
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ucMBSlaveID[usMBSlaveIDLen++] = ( UCHAR )( xIsRunning ? 0xFF : 0x00 );
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if( usAdditionalLen > 0 )
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{
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memcpy( &ucMBSlaveID[usMBSlaveIDLen], pucAdditional,
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( size_t )usAdditionalLen );
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usMBSlaveIDLen += usAdditionalLen;
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}
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}
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else
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{
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eStatus = MB_ENORES;
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}
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return eStatus;
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}
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// pucFrame points to Modbus PDU
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eMBException
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eMBFuncReportSlaveID( UCHAR * pucFrame, USHORT * usLen )
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{
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memcpy( &pucFrame[MB_PDU_FUNC_DATA_OFF], &ucMBSlaveID[0], ( size_t )usMBSlaveIDLen );
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*usLen = ( USHORT )( MB_PDU_FUNC_DATA_OFF + usMBSlaveIDLen );
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pucFrame[MB_PDU_BYTECNT_OFF] = usMBSlaveIDLen;
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return MB_EX_NONE;
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}
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#endif
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#endif
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