456 lines
18 KiB
C
456 lines
18 KiB
C
/*
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* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
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* Copyright (C) 2013 Armink <armink.ztl@gmail.com>
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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: mbfuncholding_m.c,v 1.60 2013/09/02 14:13:40 Armink Add Master Functions 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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/* ----------------------- Defines ------------------------------------------*/
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#define MB_PDU_REQ_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0 )
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#define MB_PDU_REQ_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
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#define MB_PDU_REQ_READ_SIZE ( 4 )
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#define MB_PDU_FUNC_READ_REGCNT_MAX ( 0x007D )
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#define MB_PDU_FUNC_READ_BYTECNT_OFF ( MB_PDU_DATA_OFF + 0 )
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#define MB_PDU_FUNC_READ_VALUES_OFF ( MB_PDU_DATA_OFF + 1 )
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#define MB_PDU_FUNC_READ_SIZE_MIN ( 1 )
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#define MB_PDU_REQ_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 0)
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#define MB_PDU_REQ_WRITE_VALUE_OFF ( MB_PDU_DATA_OFF + 2 )
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#define MB_PDU_REQ_WRITE_SIZE ( 4 )
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#define MB_PDU_FUNC_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 0)
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#define MB_PDU_FUNC_WRITE_VALUE_OFF ( MB_PDU_DATA_OFF + 2 )
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#define MB_PDU_FUNC_WRITE_SIZE ( 4 )
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#define MB_PDU_REQ_WRITE_MUL_ADDR_OFF ( MB_PDU_DATA_OFF + 0 )
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#define MB_PDU_REQ_WRITE_MUL_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
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#define MB_PDU_REQ_WRITE_MUL_BYTECNT_OFF ( MB_PDU_DATA_OFF + 4 )
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#define MB_PDU_REQ_WRITE_MUL_VALUES_OFF ( MB_PDU_DATA_OFF + 5 )
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#define MB_PDU_REQ_WRITE_MUL_SIZE_MIN ( 5 )
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#define MB_PDU_REQ_WRITE_MUL_REGCNT_MAX ( 0x0078 )
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#define MB_PDU_FUNC_WRITE_MUL_ADDR_OFF ( MB_PDU_DATA_OFF + 0 )
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#define MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
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#define MB_PDU_FUNC_WRITE_MUL_SIZE ( 4 )
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#define MB_PDU_REQ_READWRITE_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0 )
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#define MB_PDU_REQ_READWRITE_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
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#define MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 4 )
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#define MB_PDU_REQ_READWRITE_WRITE_REGCNT_OFF ( MB_PDU_DATA_OFF + 6 )
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#define MB_PDU_REQ_READWRITE_WRITE_BYTECNT_OFF ( MB_PDU_DATA_OFF + 8 )
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#define MB_PDU_REQ_READWRITE_WRITE_VALUES_OFF ( MB_PDU_DATA_OFF + 9 )
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#define MB_PDU_REQ_READWRITE_SIZE_MIN ( 9 )
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#define MB_PDU_FUNC_READWRITE_READ_BYTECNT_OFF ( MB_PDU_DATA_OFF + 0 )
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#define MB_PDU_FUNC_READWRITE_READ_VALUES_OFF ( MB_PDU_DATA_OFF + 1 )
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#define MB_PDU_FUNC_READWRITE_SIZE_MIN ( 1 )
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/* ----------------------- Static functions ---------------------------------*/
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eMBException prveMBError2Exception( eMBErrorCode eErrorCode );
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/* ----------------------- Start implementation -----------------------------*/
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#if MB_MASTER_RTU_ENABLED > 0 || MB_MASTER_ASCII_ENABLED > 0
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#if MB_FUNC_WRITE_HOLDING_ENABLED > 0
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/**
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* This function will request write holding register.
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*
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* @param ucSndAddr salve address
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* @param usRegAddr register start address
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* @param usRegData register data to be written
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* @param lTimeOut timeout (-1 will waiting forever)
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*
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* @return error code
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*/
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eMBMasterReqErrCode
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eMBMasterReqWriteHoldingRegister( UCHAR ucSndAddr, USHORT usRegAddr, USHORT usRegData, 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_WRITE_REGISTER;
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ucMBFrame[MB_PDU_REQ_WRITE_ADDR_OFF] = usRegAddr >> 8;
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ucMBFrame[MB_PDU_REQ_WRITE_ADDR_OFF + 1] = usRegAddr;
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ucMBFrame[MB_PDU_REQ_WRITE_VALUE_OFF] = usRegData >> 8;
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ucMBFrame[MB_PDU_REQ_WRITE_VALUE_OFF + 1] = usRegData ;
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vMBMasterSetPDUSndLength( MB_PDU_SIZE_MIN + MB_PDU_REQ_WRITE_SIZE );
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( void ) xMBMasterPortEventPost( EV_MASTER_FRAME_SENT );
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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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eMBMasterFuncWriteHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
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{
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USHORT usRegAddress;
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eMBException eStatus = MB_EX_NONE;
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eMBErrorCode eRegStatus;
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if( *usLen == ( MB_PDU_SIZE_MIN + MB_PDU_FUNC_WRITE_SIZE ) )
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{
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usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF] << 8 );
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usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF + 1] );
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usRegAddress++;
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/* Make callback to update the value. */
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eRegStatus = eMBMasterRegHoldingCB( &pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF],
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usRegAddress, 1, MB_REG_WRITE );
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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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#endif
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#if MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED > 0
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/**
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* This function will request write multiple holding register.
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*
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* @param ucSndAddr salve address
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* @param usRegAddr register start address
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* @param usNRegs register total number
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* @param pusDataBuffer data to be written
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* @param lTimeOut timeout (-1 will waiting forever)
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*
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* @return error code
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*/
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eMBMasterReqErrCode
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eMBMasterReqWriteMultipleHoldingRegister( UCHAR ucSndAddr,
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USHORT usRegAddr, USHORT usNRegs, USHORT * pusDataBuffer, LONG lTimeOut )
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{
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UCHAR *ucMBFrame;
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USHORT usRegIndex = 0;
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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_WRITE_MULTIPLE_REGISTERS;
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ucMBFrame[MB_PDU_REQ_WRITE_MUL_ADDR_OFF] = usRegAddr >> 8;
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ucMBFrame[MB_PDU_REQ_WRITE_MUL_ADDR_OFF + 1] = usRegAddr;
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ucMBFrame[MB_PDU_REQ_WRITE_MUL_REGCNT_OFF] = usNRegs >> 8;
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ucMBFrame[MB_PDU_REQ_WRITE_MUL_REGCNT_OFF + 1] = usNRegs ;
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ucMBFrame[MB_PDU_REQ_WRITE_MUL_BYTECNT_OFF] = usNRegs * 2;
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ucMBFrame += MB_PDU_REQ_WRITE_MUL_VALUES_OFF;
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while( usNRegs > usRegIndex)
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{
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*ucMBFrame++ = pusDataBuffer[usRegIndex] >> 8;
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*ucMBFrame++ = pusDataBuffer[usRegIndex++] ;
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}
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vMBMasterSetPDUSndLength( MB_PDU_SIZE_MIN + MB_PDU_REQ_WRITE_MUL_SIZE_MIN + 2*usNRegs );
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( void ) xMBMasterPortEventPost( EV_MASTER_FRAME_SENT );
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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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eMBMasterFuncWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
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{
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UCHAR *ucMBFrame;
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USHORT usRegAddress;
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USHORT usRegCount;
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UCHAR ucRegByteCount;
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eMBException eStatus = MB_EX_NONE;
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eMBErrorCode eRegStatus;
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/* If this request is broadcast, the *usLen is not need check. */
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if( ( *usLen == MB_PDU_SIZE_MIN + MB_PDU_FUNC_WRITE_MUL_SIZE ) || xMBMasterRequestIsBroadcast() )
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{
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vMBMasterGetPDUSndBuf(&ucMBFrame);
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usRegAddress = ( USHORT )( ucMBFrame[MB_PDU_REQ_WRITE_MUL_ADDR_OFF] << 8 );
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usRegAddress |= ( USHORT )( ucMBFrame[MB_PDU_REQ_WRITE_MUL_ADDR_OFF + 1] );
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usRegAddress++;
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usRegCount = ( USHORT )( ucMBFrame[MB_PDU_REQ_WRITE_MUL_REGCNT_OFF] << 8 );
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usRegCount |= ( USHORT )( ucMBFrame[MB_PDU_REQ_WRITE_MUL_REGCNT_OFF + 1] );
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ucRegByteCount = ucMBFrame[MB_PDU_REQ_WRITE_MUL_BYTECNT_OFF];
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if( ucRegByteCount == 2 * usRegCount )
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{
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/* Make callback to update the register values. */
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eRegStatus =
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eMBMasterRegHoldingCB( &ucMBFrame[MB_PDU_REQ_WRITE_MUL_VALUES_OFF],
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usRegAddress, usRegCount, MB_REG_WRITE );
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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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eStatus = MB_EX_ILLEGAL_DATA_VALUE;
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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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#endif
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#if MB_FUNC_READ_HOLDING_ENABLED > 0
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/**
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* This function will request read holding register.
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*
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* @param ucSndAddr salve address
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* @param usRegAddr register start address
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* @param usNRegs register total number
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* @param lTimeOut timeout (-1 will waiting forever)
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*
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* @return error code
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*/
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eMBMasterReqErrCode
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eMBMasterReqReadHoldingRegister( UCHAR ucSndAddr, USHORT usRegAddr, USHORT usNRegs, 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_READ_HOLDING_REGISTER;
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ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF] = usRegAddr >> 8;
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ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF + 1] = usRegAddr;
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ucMBFrame[MB_PDU_REQ_READ_REGCNT_OFF] = usNRegs >> 8;
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ucMBFrame[MB_PDU_REQ_READ_REGCNT_OFF + 1] = usNRegs;
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vMBMasterSetPDUSndLength( MB_PDU_SIZE_MIN + MB_PDU_REQ_READ_SIZE );
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( void ) xMBMasterPortEventPost( EV_MASTER_FRAME_SENT );
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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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eMBMasterFuncReadHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
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{
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UCHAR *ucMBFrame;
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USHORT usRegAddress;
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USHORT usRegCount;
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eMBException eStatus = MB_EX_NONE;
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eMBErrorCode eRegStatus;
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/* If this request is broadcast, and it's read mode. This request don't need execute. */
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if ( xMBMasterRequestIsBroadcast() )
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{
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eStatus = MB_EX_NONE;
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}
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else if( *usLen >= MB_PDU_SIZE_MIN + MB_PDU_FUNC_READ_SIZE_MIN )
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{
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vMBMasterGetPDUSndBuf(&ucMBFrame);
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usRegAddress = ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF] << 8 );
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usRegAddress |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF + 1] );
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usRegAddress++;
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usRegCount = ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_REGCNT_OFF] << 8 );
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usRegCount |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_REGCNT_OFF + 1] );
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/* Check if the number of registers to read is valid. If not
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* return Modbus illegal data value exception.
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*/
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if( ( usRegCount >= 1 ) && ( 2 * usRegCount == pucFrame[MB_PDU_FUNC_READ_BYTECNT_OFF] ) )
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{
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/* Make callback to fill the buffer. */
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eRegStatus = eMBMasterRegHoldingCB( &pucFrame[MB_PDU_FUNC_READ_VALUES_OFF], usRegAddress, usRegCount, MB_REG_READ );
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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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eStatus = MB_EX_ILLEGAL_DATA_VALUE;
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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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#endif
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#if MB_FUNC_READWRITE_HOLDING_ENABLED > 0
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/**
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* This function will request read and write holding register.
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*
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* @param ucSndAddr salve address
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* @param usReadRegAddr read register start address
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* @param usNReadRegs read register total number
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* @param pusDataBuffer data to be written
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* @param usWriteRegAddr write register start address
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* @param usNWriteRegs write register total number
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* @param lTimeOut timeout (-1 will waiting forever)
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*
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* @return error code
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*/
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eMBMasterReqErrCode
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eMBMasterReqReadWriteMultipleHoldingRegister( UCHAR ucSndAddr,
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USHORT usReadRegAddr, USHORT usNReadRegs, USHORT * pusDataBuffer,
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USHORT usWriteRegAddr, USHORT usNWriteRegs, LONG lTimeOut )
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{
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UCHAR *ucMBFrame;
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USHORT usRegIndex = 0;
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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_READWRITE_MULTIPLE_REGISTERS;
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ucMBFrame[MB_PDU_REQ_READWRITE_READ_ADDR_OFF] = usReadRegAddr >> 8;
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ucMBFrame[MB_PDU_REQ_READWRITE_READ_ADDR_OFF + 1] = usReadRegAddr;
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ucMBFrame[MB_PDU_REQ_READWRITE_READ_REGCNT_OFF] = usNReadRegs >> 8;
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ucMBFrame[MB_PDU_REQ_READWRITE_READ_REGCNT_OFF + 1] = usNReadRegs ;
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ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF] = usWriteRegAddr >> 8;
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ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF + 1] = usWriteRegAddr;
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ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_REGCNT_OFF] = usNWriteRegs >> 8;
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ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_REGCNT_OFF + 1] = usNWriteRegs ;
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ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_BYTECNT_OFF] = usNWriteRegs * 2;
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ucMBFrame += MB_PDU_REQ_READWRITE_WRITE_VALUES_OFF;
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while( usNWriteRegs > usRegIndex)
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{
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*ucMBFrame++ = pusDataBuffer[usRegIndex] >> 8;
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*ucMBFrame++ = pusDataBuffer[usRegIndex++] ;
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}
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vMBMasterSetPDUSndLength( MB_PDU_SIZE_MIN + MB_PDU_REQ_READWRITE_SIZE_MIN + 2*usNWriteRegs );
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( void ) xMBMasterPortEventPost( EV_MASTER_FRAME_SENT );
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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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eMBMasterFuncReadWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
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{
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USHORT usRegReadAddress;
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USHORT usRegReadCount;
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USHORT usRegWriteAddress;
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USHORT usRegWriteCount;
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UCHAR *ucMBFrame;
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eMBException eStatus = MB_EX_NONE;
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eMBErrorCode eRegStatus;
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/* If this request is broadcast, and it's read mode. This request don't need execute. */
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if ( xMBMasterRequestIsBroadcast() )
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{
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eStatus = MB_EX_NONE;
|
|
}
|
|
else if( *usLen >= MB_PDU_SIZE_MIN + MB_PDU_FUNC_READWRITE_SIZE_MIN )
|
|
{
|
|
vMBMasterGetPDUSndBuf(&ucMBFrame);
|
|
usRegReadAddress = ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_READ_ADDR_OFF] << 8U );
|
|
usRegReadAddress |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_READ_ADDR_OFF + 1] );
|
|
usRegReadAddress++;
|
|
|
|
usRegReadCount = ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_READ_REGCNT_OFF] << 8U );
|
|
usRegReadCount |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_READ_REGCNT_OFF + 1] );
|
|
|
|
usRegWriteAddress = ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF] << 8U );
|
|
usRegWriteAddress |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF + 1] );
|
|
usRegWriteAddress++;
|
|
|
|
usRegWriteCount = ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_REGCNT_OFF] << 8U );
|
|
usRegWriteCount |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_REGCNT_OFF + 1] );
|
|
|
|
if( ( 2 * usRegReadCount ) == pucFrame[MB_PDU_FUNC_READWRITE_READ_BYTECNT_OFF] )
|
|
{
|
|
/* Make callback to update the register values. */
|
|
eRegStatus = eMBMasterRegHoldingCB( &ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_VALUES_OFF],
|
|
usRegWriteAddress, usRegWriteCount, MB_REG_WRITE );
|
|
|
|
if( eRegStatus == MB_ENOERR )
|
|
{
|
|
/* Make the read callback. */
|
|
eRegStatus = eMBMasterRegHoldingCB(&pucFrame[MB_PDU_FUNC_READWRITE_READ_VALUES_OFF],
|
|
usRegReadAddress, usRegReadCount, MB_REG_READ);
|
|
}
|
|
if( eRegStatus != MB_ENOERR )
|
|
{
|
|
eStatus = prveMBError2Exception( eRegStatus );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
|
}
|
|
}
|
|
return eStatus;
|
|
}
|
|
|
|
#endif
|
|
#endif
|
|
|