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543 lines
20 KiB
C
543 lines
20 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: mbrtu_m.c,v 1.60 2013/08/20 11:18:10 Armink Add Master Functions $
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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_m.h"
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#include "mbconfig.h"
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#include "mbframe.h"
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#include "mbproto.h"
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#include "mbfunc.h"
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#include "mbport.h"
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#if MB_MASTER_RTU_ENABLED
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#include "mbrtu.h"
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#endif
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#if MB_MASTER_ASCII_ENABLED
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#include "mbascii.h"
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#endif
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#if MB_MASTER_TCP_ENABLED
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#include "mbtcp.h"
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#include "mbtcp_m.h"
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#endif
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#if MB_MASTER_RTU_ENABLED || MB_MASTER_ASCII_ENABLED || MB_MASTER_TCP_ENABLED
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#ifndef MB_PORT_HAS_CLOSE
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#define MB_PORT_HAS_CLOSE 1
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#endif
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/* ----------------------- Static variables ---------------------------------*/
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static UCHAR ucMBMasterDestAddress;
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static BOOL xMBRunInMasterMode = FALSE;
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static volatile eMBMasterErrorEventType eMBMasterCurErrorType;
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static volatile USHORT usMasterSendPDULength;
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static volatile eMBMode eMBMasterCurrentMode;
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/*------------------------ Shared variables ---------------------------------*/
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volatile UCHAR ucMasterSndBuf[MB_SERIAL_BUF_SIZE];
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volatile UCHAR ucMasterRcvBuf[MB_SERIAL_BUF_SIZE];
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volatile eMBMasterTimerMode eMasterCurTimerMode;
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volatile BOOL xFrameIsBroadcast = FALSE;
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static enum
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{
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STATE_ENABLED,
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STATE_DISABLED,
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STATE_NOT_INITIALIZED
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} eMBState = STATE_NOT_INITIALIZED;
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/* Functions pointer which are initialized in eMBInit( ). Depending on the
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* mode (RTU or ASCII) the are set to the correct implementations.
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* Using for Modbus Master,Add by Armink 20130813
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*/
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static peMBFrameSend peMBMasterFrameSendCur;
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static pvMBFrameStart pvMBMasterFrameStartCur;
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static pvMBFrameStop pvMBMasterFrameStopCur;
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static peMBFrameReceive peMBMasterFrameReceiveCur;
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static pvMBFrameClose pvMBMasterFrameCloseCur;
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/* Callback functions required by the porting layer. They are called when
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* an external event has happend which includes a timeout or the reception
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* or transmission of a character.
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* Using for Modbus Master,Add by Armink 20130813
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*/
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BOOL( *pxMBMasterFrameCBByteReceived ) ( void );
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BOOL( *pxMBMasterFrameCBTransmitterEmpty ) ( void );
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BOOL( *pxMBMasterPortCBTimerExpired ) ( void );
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BOOL( *pxMBMasterFrameCBReceiveFSMCur ) ( void );
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BOOL( *pxMBMasterFrameCBTransmitFSMCur ) ( void );
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/* An array of Modbus functions handlers which associates Modbus function
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* codes with implementing functions.
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*/
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static xMBFunctionHandler xMasterFuncHandlers[MB_FUNC_HANDLERS_MAX] = {
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#if MB_FUNC_OTHER_REP_SLAVEID_ENABLED > 0
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{MB_FUNC_OTHER_REPORT_SLAVEID, eMBFuncReportSlaveID},
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#endif
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#if MB_FUNC_READ_INPUT_ENABLED > 0
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{MB_FUNC_READ_INPUT_REGISTER, eMBMasterFuncReadInputRegister},
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#endif
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#if MB_FUNC_READ_HOLDING_ENABLED > 0
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{MB_FUNC_READ_HOLDING_REGISTER, eMBMasterFuncReadHoldingRegister},
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#endif
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#if MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED > 0
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{MB_FUNC_WRITE_MULTIPLE_REGISTERS, eMBMasterFuncWriteMultipleHoldingRegister},
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#endif
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#if MB_FUNC_WRITE_HOLDING_ENABLED > 0
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{MB_FUNC_WRITE_REGISTER, eMBMasterFuncWriteHoldingRegister},
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#endif
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#if MB_FUNC_READWRITE_HOLDING_ENABLED > 0
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{MB_FUNC_READWRITE_MULTIPLE_REGISTERS, eMBMasterFuncReadWriteMultipleHoldingRegister},
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#endif
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#if MB_FUNC_READ_COILS_ENABLED > 0
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{MB_FUNC_READ_COILS, eMBMasterFuncReadCoils},
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#endif
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#if MB_FUNC_WRITE_COIL_ENABLED > 0
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{MB_FUNC_WRITE_SINGLE_COIL, eMBMasterFuncWriteCoil},
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#endif
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#if MB_FUNC_WRITE_MULTIPLE_COILS_ENABLED > 0
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{MB_FUNC_WRITE_MULTIPLE_COILS, eMBMasterFuncWriteMultipleCoils},
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#endif
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#if MB_FUNC_READ_DISCRETE_INPUTS_ENABLED > 0
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{MB_FUNC_READ_DISCRETE_INPUTS, eMBMasterFuncReadDiscreteInputs},
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#endif
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};
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/* ----------------------- Start implementation -----------------------------*/
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#if MB_MASTER_TCP_ENABLED > 0
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eMBErrorCode
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eMBMasterTCPInit( USHORT ucTCPPort )
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{
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eMBErrorCode eStatus = MB_ENOERR;
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if( ( eStatus = eMBMasterTCPDoInit( ucTCPPort ) ) != MB_ENOERR ) {
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eMBState = STATE_DISABLED;
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}
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else if( !xMBMasterPortEventInit( ) ) {
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/* Port dependent event module initialization failed. */
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eStatus = MB_EPORTERR;
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} else {
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pvMBMasterFrameStartCur = eMBMasterTCPStart;
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pvMBMasterFrameStopCur = eMBMasterTCPStop;
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peMBMasterFrameReceiveCur = eMBMasterTCPReceive;
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peMBMasterFrameSendCur = eMBMasterTCPSend;
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pxMBMasterPortCBTimerExpired = xMBMasterTCPTimerExpired;
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pvMBMasterFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBMasterTCPPortClose : NULL;
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ucMBMasterDestAddress = MB_TCP_PSEUDO_ADDRESS;
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eMBMasterCurrentMode = MB_TCP;
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eMBState = STATE_DISABLED;
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// initialize the OS resource for modbus master.
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vMBMasterOsResInit();
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if( xMBMasterPortTimersInit( MB_MASTER_TIMEOUT_MS_RESPOND * MB_TIMER_TICS_PER_MS ) != TRUE )
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{
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eStatus = MB_EPORTERR;
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}
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}
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return eStatus;
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}
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#endif
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eMBErrorCode
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eMBMasterSerialInit( eMBMode eMode, UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity )
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{
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eMBErrorCode eStatus = MB_ENOERR;
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switch (eMode)
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{
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#if MB_MASTER_RTU_ENABLED > 0
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case MB_RTU:
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pvMBMasterFrameStartCur = eMBMasterRTUStart;
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pvMBMasterFrameStopCur = eMBMasterRTUStop;
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peMBMasterFrameSendCur = eMBMasterRTUSend;
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peMBMasterFrameReceiveCur = eMBMasterRTUReceive;
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pvMBMasterFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBMasterPortClose : NULL;
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pxMBMasterFrameCBByteReceived = xMBMasterRTUReceiveFSM;
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pxMBMasterFrameCBTransmitterEmpty = xMBMasterRTUTransmitFSM;
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pxMBMasterPortCBTimerExpired = xMBMasterRTUTimerExpired;
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eMBMasterCurrentMode = MB_ASCII;
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eStatus = eMBMasterRTUInit(ucPort, ulBaudRate, eParity);
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break;
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#endif
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#if MB_MASTER_ASCII_ENABLED > 0
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case MB_ASCII:
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pvMBMasterFrameStartCur = eMBMasterASCIIStart;
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pvMBMasterFrameStopCur = eMBMasterASCIIStop;
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peMBMasterFrameSendCur = eMBMasterASCIISend;
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peMBMasterFrameReceiveCur = eMBMasterASCIIReceive;
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pvMBMasterFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBMasterPortClose : NULL;
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pxMBMasterFrameCBByteReceived = xMBMasterASCIIReceiveFSM;
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pxMBMasterFrameCBTransmitterEmpty = xMBMasterASCIITransmitFSM;
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pxMBMasterPortCBTimerExpired = xMBMasterASCIITimerT1SExpired;
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eMBMasterCurrentMode = MB_RTU;
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eStatus = eMBMasterASCIIInit(ucPort, ulBaudRate, eParity );
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break;
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#endif
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default:
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eStatus = MB_EINVAL;
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break;
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}
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if (eStatus == MB_ENOERR)
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{
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if (!xMBMasterPortEventInit())
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{
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/* port dependent event module initalization failed. */
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eStatus = MB_EPORTERR;
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}
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else
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{
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eMBState = STATE_DISABLED;
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}
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/* initialize the OS resource for modbus master. */
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vMBMasterOsResInit();
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}
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return eStatus;
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}
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eMBErrorCode
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eMBMasterClose( void )
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{
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eMBErrorCode eStatus = MB_ENOERR;
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if( eMBState == STATE_DISABLED )
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{
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if( pvMBMasterFrameCloseCur != NULL )
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{
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pvMBMasterFrameCloseCur( );
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}
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}
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else
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{
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eStatus = MB_EILLSTATE;
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}
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return eStatus;
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}
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eMBErrorCode
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eMBMasterEnable( void )
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{
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eMBErrorCode eStatus = MB_ENOERR;
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if( eMBState == STATE_DISABLED )
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{
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/* Activate the protocol stack. */
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pvMBMasterFrameStartCur( );
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/* Release the resource, because it created in busy state */
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//vMBMasterRunResRelease( );
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eMBState = STATE_ENABLED;
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}
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else
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{
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eStatus = MB_EILLSTATE;
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}
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return eStatus;
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}
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eMBErrorCode
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eMBMasterDisable( void )
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{
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eMBErrorCode eStatus;
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if( eMBState == STATE_ENABLED )
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{
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pvMBMasterFrameStopCur( );
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eMBState = STATE_DISABLED;
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eStatus = MB_ENOERR;
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}
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else if( eMBState == STATE_DISABLED )
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{
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eStatus = MB_ENOERR;
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}
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else
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{
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eStatus = MB_EILLSTATE;
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}
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return eStatus;
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}
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eMBErrorCode
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eMBMasterPoll( void )
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{
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static UCHAR *ucMBFrame = NULL;
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static UCHAR ucRcvAddress;
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static UCHAR ucFunctionCode;
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static USHORT usLength;
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static eMBException eException;
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int i;
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int j;
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eMBErrorCode eStatus = MB_ENOERR;
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eMBMasterEventType eEvent;
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eMBMasterErrorEventType errorType;
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/* Check if the protocol stack is ready. */
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if( eMBState != STATE_ENABLED )
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{
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return MB_EILLSTATE;
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}
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/* Check if there is a event available. If not return control to caller.
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* Otherwise we will handle the event. */
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if ( xMBMasterPortEventGet( &eEvent ) == TRUE )
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{
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while( eEvent ) {
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// In some cases it is possible that more than one event set
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// together (even from one subset mask) than process them consistently
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if ( MB_PORT_CHECK_EVENT( eEvent, EV_MASTER_READY ) ) {
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ESP_LOGD(MB_PORT_TAG, "%s:EV_MASTER_READY", __func__);
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MB_PORT_CLEAR_EVENT( eEvent, EV_MASTER_READY );
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} else if ( MB_PORT_CHECK_EVENT( eEvent, EV_MASTER_FRAME_TRANSMIT ) ) {
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ESP_LOGD(MB_PORT_TAG, "%s:EV_MASTER_FRAME_TRANSMIT", __func__);
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/* Master is busy now. */
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vMBMasterGetPDUSndBuf( &ucMBFrame );
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ESP_LOG_BUFFER_HEX_LEVEL("POLL transmit buffer", (void*)ucMBFrame, usMBMasterGetPDUSndLength(), ESP_LOG_DEBUG);
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eStatus = peMBMasterFrameSendCur( ucMBMasterGetDestAddress(), ucMBFrame, usMBMasterGetPDUSndLength() );
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if (eStatus != MB_ENOERR)
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{
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ESP_LOGE( MB_PORT_TAG, "%s:Frame send error. %d", __func__, eStatus );
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}
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MB_PORT_CLEAR_EVENT( eEvent, EV_MASTER_FRAME_TRANSMIT );
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} else if ( MB_PORT_CHECK_EVENT( eEvent, EV_MASTER_FRAME_SENT ) ) {
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ESP_LOGD( MB_PORT_TAG, "%s:EV_MASTER_FRAME_SENT", __func__ );
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ESP_LOG_BUFFER_HEX_LEVEL("POLL sent buffer", (void*)ucMBFrame, usMBMasterGetPDUSndLength(), ESP_LOG_DEBUG);
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MB_PORT_CLEAR_EVENT( eEvent, EV_MASTER_FRAME_SENT );
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} else if ( MB_PORT_CHECK_EVENT( eEvent, EV_MASTER_FRAME_RECEIVED ) ) {
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eStatus = peMBMasterFrameReceiveCur( &ucRcvAddress, &ucMBFrame, &usLength);
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// Check if the frame is for us. If not ,send an error process event.
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if ( ( eStatus == MB_ENOERR ) && ( ( ucRcvAddress == ucMBMasterGetDestAddress() )
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|| ( ucRcvAddress == MB_TCP_PSEUDO_ADDRESS ) ) )
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{
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( void ) xMBMasterPortEventPost( EV_MASTER_EXECUTE );
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ESP_LOGD(MB_PORT_TAG, "%s: Packet data received successfully (%u).", __func__, eStatus);
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ESP_LOG_BUFFER_HEX_LEVEL("POLL receive buffer", (void*)ucMBFrame, (uint16_t)usLength, ESP_LOG_DEBUG);
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}
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else
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{
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vMBMasterSetErrorType(EV_ERROR_RECEIVE_DATA);
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( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS );
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ESP_LOGD( MB_PORT_TAG, "%s: Packet data receive failed (addr=%u)(%u).",
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__func__, ucRcvAddress, eStatus);
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}
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MB_PORT_CLEAR_EVENT( eEvent, EV_MASTER_FRAME_RECEIVED );
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} else if ( MB_PORT_CHECK_EVENT( eEvent, EV_MASTER_EXECUTE ) ) {
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if ( !ucMBFrame )
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{
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return MB_EILLSTATE;
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}
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ESP_LOGD(MB_PORT_TAG, "%s:EV_MASTER_EXECUTE", __func__);
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ucFunctionCode = ucMBFrame[MB_PDU_FUNC_OFF];
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eException = MB_EX_ILLEGAL_FUNCTION;
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/* If receive frame has exception. The receive function code highest bit is 1.*/
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if (ucFunctionCode & MB_FUNC_ERROR)
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{
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eException = (eMBException)ucMBFrame[MB_PDU_DATA_OFF];
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} else {
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for ( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ )
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{
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/* No more function handlers registered. Abort. */
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if (xMasterFuncHandlers[i].ucFunctionCode == 0)
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{
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break;
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}
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if (xMasterFuncHandlers[i].ucFunctionCode == ucFunctionCode)
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{
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vMBMasterSetCBRunInMasterMode(TRUE);
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/* If master request is broadcast,
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* the master need execute function for all slave.
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*/
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if ( xMBMasterRequestIsBroadcast() )
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{
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usLength = usMBMasterGetPDUSndLength();
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for(j = 1; j <= MB_MASTER_TOTAL_SLAVE_NUM; j++)
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{
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vMBMasterSetDestAddress(j);
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eException = xMasterFuncHandlers[i].pxHandler(ucMBFrame, &usLength);
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}
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}
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else
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{
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eException = xMasterFuncHandlers[i].pxHandler( ucMBFrame, &usLength );
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}
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vMBMasterSetCBRunInMasterMode( FALSE );
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break;
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}
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}
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}
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/* If master has exception, will send error process event. Otherwise the master is idle.*/
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if ( eException != MB_EX_NONE )
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{
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vMBMasterSetErrorType( EV_ERROR_EXECUTE_FUNCTION );
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( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS );
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}
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else
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{
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if ( eMBMasterGetErrorType( ) == EV_ERROR_INIT ) {
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vMBMasterSetErrorType(EV_ERROR_OK);
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ESP_LOGD( MB_PORT_TAG, "%s: set event EV_ERROR_OK", __func__ );
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( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS );
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}
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}
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MB_PORT_CLEAR_EVENT( eEvent, EV_MASTER_EXECUTE );
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} else if ( MB_PORT_CHECK_EVENT( eEvent, EV_MASTER_ERROR_PROCESS ) ) {
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ESP_LOGD( MB_PORT_TAG, "%s:EV_MASTER_ERROR_PROCESS", __func__ );
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/* Execute specified error process callback function. */
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errorType = eMBMasterGetErrorType( );
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vMBMasterGetPDUSndBuf( &ucMBFrame );
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switch ( errorType )
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{
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case EV_ERROR_RESPOND_TIMEOUT:
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vMBMasterErrorCBRespondTimeout( ucMBMasterGetDestAddress( ),
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ucMBFrame, usMBMasterGetPDUSndLength( ) );
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break;
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case EV_ERROR_RECEIVE_DATA:
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vMBMasterErrorCBReceiveData( ucMBMasterGetDestAddress( ),
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ucMBFrame, usMBMasterGetPDUSndLength( ) );
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break;
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case EV_ERROR_EXECUTE_FUNCTION:
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vMBMasterErrorCBExecuteFunction( ucMBMasterGetDestAddress( ),
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ucMBFrame, usMBMasterGetPDUSndLength( ) );
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break;
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case EV_ERROR_OK:
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vMBMasterCBRequestSuccess( );
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break;
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default:
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ESP_LOGE( MB_PORT_TAG, "%s: incorrect error type = %d.", __func__, errorType);
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break;
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}
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vMBMasterSetErrorType( EV_ERROR_INIT );
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MB_PORT_CLEAR_EVENT( eEvent, EV_MASTER_ERROR_PROCESS );
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vMBMasterRunResRelease( );
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}
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}
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} else {
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// Something went wrong and task unblocked but there are no any correct events set
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ESP_LOGE( MB_PORT_TAG, "%s: Unexpected event triggered 0x%02x.", __func__, eEvent );
|
|
eStatus = MB_EILLSTATE;
|
|
}
|
|
return eStatus;
|
|
}
|
|
|
|
// Get whether the Modbus Master is run in master mode.
|
|
BOOL xMBMasterGetCBRunInMasterMode( void )
|
|
{
|
|
return xMBRunInMasterMode;
|
|
}
|
|
|
|
// Set whether the Modbus Master is run in master mode.
|
|
void vMBMasterSetCBRunInMasterMode( BOOL IsMasterMode )
|
|
{
|
|
xMBRunInMasterMode = IsMasterMode;
|
|
}
|
|
|
|
// Get Modbus Master send destination address.
|
|
UCHAR ucMBMasterGetDestAddress( void )
|
|
{
|
|
return ucMBMasterDestAddress;
|
|
}
|
|
|
|
// Set Modbus Master send destination address.
|
|
void vMBMasterSetDestAddress( UCHAR Address )
|
|
{
|
|
ucMBMasterDestAddress = Address;
|
|
}
|
|
|
|
// Get Modbus Master current error event type.
|
|
eMBMasterErrorEventType inline eMBMasterGetErrorType( void )
|
|
{
|
|
return eMBMasterCurErrorType;
|
|
}
|
|
|
|
// Set Modbus Master current error event type.
|
|
void IRAM_ATTR vMBMasterSetErrorType( eMBMasterErrorEventType errorType )
|
|
{
|
|
eMBMasterCurErrorType = errorType;
|
|
}
|
|
|
|
/* Get Modbus Master send PDU's buffer address pointer.*/
|
|
void vMBMasterGetPDUSndBuf( UCHAR ** pucFrame )
|
|
{
|
|
*pucFrame = ( UCHAR * ) &ucMasterSndBuf[MB_SER_PDU_PDU_OFF];
|
|
}
|
|
|
|
/* Set Modbus Master send PDU's buffer length.*/
|
|
void vMBMasterSetPDUSndLength( USHORT SendPDULength )
|
|
{
|
|
usMasterSendPDULength = SendPDULength;
|
|
}
|
|
|
|
/* Get Modbus Master send PDU's buffer length.*/
|
|
USHORT usMBMasterGetPDUSndLength( void )
|
|
{
|
|
return usMasterSendPDULength;
|
|
}
|
|
|
|
/* Set Modbus Master current timer mode.*/
|
|
void vMBMasterSetCurTimerMode( eMBMasterTimerMode eMBTimerMode )
|
|
{
|
|
eMasterCurTimerMode = eMBTimerMode;
|
|
}
|
|
|
|
/* Get Modbus Master current timer mode.*/
|
|
eMBMasterTimerMode MB_PORT_ISR_ATTR xMBMasterGetCurTimerMode( void )
|
|
{
|
|
return eMasterCurTimerMode;
|
|
}
|
|
|
|
/* The master request is broadcast? */
|
|
BOOL MB_PORT_ISR_ATTR xMBMasterRequestIsBroadcast( void )
|
|
{
|
|
return xFrameIsBroadcast;
|
|
}
|
|
|
|
/* The master request is broadcast? */
|
|
void vMBMasterRequestSetType( BOOL xIsBroadcast ){
|
|
xFrameIsBroadcast = xIsBroadcast;
|
|
}
|
|
|
|
#endif // MB_MASTER_RTU_ENABLED || MB_MASTER_ASCII_ENABLED || MB_MASTER_TCP_ENABLED
|