esp-idf/components/freemodbus/modbus/functions/mbfuncother.c

93 wiersze
3.4 KiB
C

/*
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
* Copyright (c) 2006 Christian Walter <wolti@sil.at>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* File: $Id: mbfuncother.c,v 1.8 2006/12/07 22:10:34 wolti Exp $
*/
/* ----------------------- System includes ----------------------------------*/
#include "stdlib.h"
#include "string.h"
/* ----------------------- Platform includes --------------------------------*/
#include "port.h"
/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbframe.h"
#include "mbproto.h"
#include "mbconfig.h"
#if MB_SLAVE_RTU_ENABLED || MB_SLAVE_ASCII_ENABLED || MB_TCP_ENABLED
#if MB_FUNC_OTHER_REP_SLAVEID_ENABLED
/* ----------------------- Static variables ---------------------------------*/
static UCHAR ucMBSlaveID[MB_FUNC_OTHER_REP_SLAVEID_BUF];
static USHORT usMBSlaveIDLen;
/* ----------------------- Start implementation -----------------------------*/
eMBErrorCode
eMBSetSlaveID( UCHAR ucSlaveID, BOOL xIsRunning,
UCHAR const *pucAdditional, USHORT usAdditionalLen )
{
eMBErrorCode eStatus = MB_ENOERR;
/* the first byte and second byte in the buffer is reserved for
* the parameter ucSlaveID and the running flag. The rest of
* the buffer is available for additional data. */
if( usAdditionalLen + 2 < MB_FUNC_OTHER_REP_SLAVEID_BUF )
{
usMBSlaveIDLen = 0;
ucMBSlaveID[usMBSlaveIDLen++] = ucSlaveID;
ucMBSlaveID[usMBSlaveIDLen++] = ( UCHAR )( xIsRunning ? 0xFF : 0x00 );
if( usAdditionalLen > 0 )
{
memcpy( &ucMBSlaveID[usMBSlaveIDLen], pucAdditional,
( size_t )usAdditionalLen );
usMBSlaveIDLen += usAdditionalLen;
}
}
else
{
eStatus = MB_ENORES;
}
return eStatus;
}
eMBException
eMBFuncReportSlaveID( UCHAR * pucFrame, USHORT * usLen )
{
memcpy( &pucFrame[MB_PDU_DATA_OFF], &ucMBSlaveID[0], ( size_t )usMBSlaveIDLen );
*usLen = ( USHORT )( MB_PDU_DATA_OFF + usMBSlaveIDLen );
return MB_EX_NONE;
}
#endif
#endif