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@@ -0,0 +1,110 @@
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/*
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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
|
||||
*/
|
||||
/*
|
||||
* 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.
|
||||
*
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||||
* File: $Id: mbcrc.c,v 1.7 2007/02/18 23:50:27 wolti Exp $
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*/
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/* ----------------------- Platform includes --------------------------------*/
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#include "port.h"
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#include "mbconfig.h"
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#if (MB_MASTER_RTU_ENABLED || MB_SLAVE_RTU_ENABLED || CONFIG_MB_UTEST)
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static const UCHAR aucCRCHi[] = {
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40
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};
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static const UCHAR aucCRCLo[] = {
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0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7,
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0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E,
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0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9,
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0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC,
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0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
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0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32,
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0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D,
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0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38,
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0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF,
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0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
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0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1,
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0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4,
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||||
0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB,
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||||
0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA,
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0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
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||||
0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0,
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||||
0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97,
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||||
0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E,
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||||
0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89,
|
||||
0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
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||||
0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83,
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0x41, 0x81, 0x80, 0x40
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||||
};
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USHORT
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usMBCRC16( UCHAR * pucFrame, USHORT usLen )
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{
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UCHAR ucCRCHi = 0xFF;
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UCHAR ucCRCLo = 0xFF;
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int iIndex;
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while( usLen-- )
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{
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iIndex = ucCRCLo ^ *( pucFrame++ );
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ucCRCLo = ( UCHAR )( ucCRCHi ^ aucCRCHi[iIndex] );
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ucCRCHi = aucCRCLo[iIndex];
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}
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return ( USHORT )( ucCRCHi << 8 | ucCRCLo );
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}
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#endif
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@@ -0,0 +1,43 @@
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/*
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||||
* SPDX-FileCopyrightText: 2006 Christian Walter
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-3-Clause
|
||||
*
|
||||
* SPDX-FileContributor: 2016-2021 Espressif Systems (Shanghai) CO LTD
|
||||
*/
|
||||
/*
|
||||
* 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: mbcrc.h,v 1.5 2006/12/07 22:10:34 wolti Exp $
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||||
*/
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#ifndef _MB_CRC_H
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#define _MB_CRC_H
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USHORT usMBCRC16( UCHAR * pucFrame, USHORT usLen );
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#endif
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@@ -0,0 +1,372 @@
|
||||
/*
|
||||
* SPDX-FileCopyrightText: 2006 Christian Walter
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||||
*
|
||||
* SPDX-License-Identifier: BSD-3-Clause
|
||||
*
|
||||
* SPDX-FileContributor: 2016-2021 Espressif Systems (Shanghai) CO LTD
|
||||
*/
|
||||
/*
|
||||
* 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: mbrtu.c,v 1.18 2007/09/12 10:15:56 wolti Exp $
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
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#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbrtu.h"
|
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#include "mbframe.h"
|
||||
|
||||
#include "mbcrc.h"
|
||||
#include "mbport.h"
|
||||
|
||||
#if MB_SLAVE_RTU_ENABLED > 0
|
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|
||||
/* ----------------------- Type definitions ---------------------------------*/
|
||||
typedef enum
|
||||
{
|
||||
STATE_RX_INIT, /*!< Receiver is in initial state. */
|
||||
STATE_RX_IDLE, /*!< Receiver is in idle state. */
|
||||
STATE_RX_RCV, /*!< Frame is beeing received. */
|
||||
STATE_RX_ERROR /*!< If the frame is invalid. */
|
||||
} eMBRcvState;
|
||||
|
||||
typedef enum
|
||||
{
|
||||
STATE_TX_IDLE, /*!< Transmitter is in idle state. */
|
||||
STATE_TX_XMIT /*!< Transmitter is in transfer state. */
|
||||
} eMBSndState;
|
||||
|
||||
/* ----------------------- Shared variables ---------------------------------*/
|
||||
extern volatile UCHAR ucMbSlaveBuf[];
|
||||
|
||||
/* ----------------------- Static variables ---------------------------------*/
|
||||
static volatile eMBSndState eSndState;
|
||||
static volatile eMBRcvState eRcvState;
|
||||
|
||||
static volatile UCHAR *pucSndBufferCur;
|
||||
static volatile USHORT usSndBufferCount;
|
||||
|
||||
static volatile USHORT usRcvBufferPos;
|
||||
static volatile UCHAR *ucRTUBuf = ucMbSlaveBuf;
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
eMBErrorCode
|
||||
eMBRTUInit( UCHAR ucSlaveAddress, UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
ULONG usTimerT35_50us;
|
||||
|
||||
( void )ucSlaveAddress;
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
|
||||
/* Modbus RTU uses 8 Databits. */
|
||||
if( xMBPortSerialInit( ucPort, ulBaudRate, 8, eParity ) != TRUE )
|
||||
{
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* If baudrate > 19200 then we should use the fixed timer values
|
||||
* t35 = 1750us. Otherwise t35 must be 3.5 times the character time.
|
||||
*/
|
||||
if( ulBaudRate > 19200 )
|
||||
{
|
||||
usTimerT35_50us = 35; /* 1800us. */
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The timer reload value for a character is given by:
|
||||
*
|
||||
* ChTimeValue = Ticks_per_1s / ( Baudrate / 11 )
|
||||
* = 11 * Ticks_per_1s / Baudrate
|
||||
* = 220000 / Baudrate
|
||||
* The reload for t3.5 is 1.5 times this value and similary
|
||||
* for t3.5.
|
||||
*/
|
||||
usTimerT35_50us = ( 7UL * 220000UL ) / ( 2UL * ulBaudRate );
|
||||
}
|
||||
if( xMBPortTimersInit( ( USHORT ) usTimerT35_50us ) != TRUE )
|
||||
{
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
}
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
void
|
||||
eMBRTUStart( void )
|
||||
{
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
/* Initially the receiver is in the state STATE_RX_INIT. we start
|
||||
* the timer and if no character is received within t3.5 we change
|
||||
* to STATE_RX_IDLE. This makes sure that we delay startup of the
|
||||
* modbus protocol stack until the bus is free.
|
||||
*/
|
||||
eRcvState = STATE_RX_INIT;
|
||||
vMBPortSerialEnable( TRUE, FALSE );
|
||||
#if CONFIG_FMB_TIMER_PORT_ENABLED
|
||||
vMBPortTimersEnable( );
|
||||
#else
|
||||
pxMBPortCBTimerExpired();
|
||||
#endif
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
}
|
||||
|
||||
void
|
||||
eMBRTUStop( void )
|
||||
{
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
vMBPortSerialEnable( FALSE, FALSE );
|
||||
vMBPortTimersDisable( );
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBRTUReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame, USHORT * pusLength )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
UCHAR *pucMBRTUFrame = ( UCHAR* ) ucRTUBuf;
|
||||
USHORT usFrameLength = usRcvBufferPos;
|
||||
|
||||
if( xMBPortSerialGetRequest( &pucMBRTUFrame, &usFrameLength ) == FALSE )
|
||||
{
|
||||
return MB_EIO;
|
||||
}
|
||||
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
assert( usFrameLength < MB_SER_PDU_SIZE_MAX );
|
||||
|
||||
/* Length and CRC check */
|
||||
if( ( usFrameLength >= MB_SER_PDU_SIZE_MIN )
|
||||
&& ( usMBCRC16( ( UCHAR * ) pucMBRTUFrame, usFrameLength ) == 0 ) )
|
||||
{
|
||||
/* Save the address field. All frames are passed to the upper layed
|
||||
* and the decision if a frame is used is done there.
|
||||
*/
|
||||
*pucRcvAddress = pucMBRTUFrame[MB_SER_PDU_ADDR_OFF];
|
||||
|
||||
/* Total length of Modbus-PDU is Modbus-Serial-Line-PDU minus
|
||||
* size of address field and CRC checksum.
|
||||
*/
|
||||
*pusLength = ( USHORT )( usFrameLength - MB_SER_PDU_PDU_OFF - MB_SER_PDU_SIZE_CRC );
|
||||
|
||||
/* Return the start of the Modbus PDU to the caller. */
|
||||
*pucFrame = ( UCHAR * ) & pucMBRTUFrame[MB_SER_PDU_PDU_OFF];
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBRTUSend( UCHAR ucSlaveAddress, const UCHAR * pucFrame, USHORT usLength )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
USHORT usCRC16;
|
||||
|
||||
/* Check if the receiver is still in idle state. If not we where to
|
||||
* slow with processing the received frame and the master sent another
|
||||
* frame on the network. We have to abort sending the frame.
|
||||
*/
|
||||
if( eRcvState == STATE_RX_IDLE )
|
||||
{
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
/* First byte before the Modbus-PDU is the slave address. */
|
||||
pucSndBufferCur = ( UCHAR * ) pucFrame - 1;
|
||||
usSndBufferCount = 1;
|
||||
|
||||
/* Now copy the Modbus-PDU into the Modbus-Serial-Line-PDU. */
|
||||
pucSndBufferCur[MB_SER_PDU_ADDR_OFF] = ucSlaveAddress;
|
||||
usSndBufferCount += usLength;
|
||||
|
||||
/* Calculate CRC16 checksum for Modbus-Serial-Line-PDU. */
|
||||
usCRC16 = usMBCRC16( ( UCHAR * ) pucSndBufferCur, usSndBufferCount );
|
||||
ucRTUBuf[usSndBufferCount++] = ( UCHAR )( usCRC16 & 0xFF );
|
||||
ucRTUBuf[usSndBufferCount++] = ( UCHAR )( usCRC16 >> 8 );
|
||||
|
||||
/* Activate the transmitter. */
|
||||
eSndState = STATE_TX_XMIT;
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
|
||||
if( xMBPortSerialSendResponse( ( UCHAR * ) pucSndBufferCur, usSndBufferCount ) == FALSE )
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
|
||||
vMBPortSerialEnable( FALSE, TRUE );
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBRTUReceiveFSM( void )
|
||||
{
|
||||
BOOL xStatus = FALSE;
|
||||
UCHAR ucByte;
|
||||
|
||||
assert( eSndState == STATE_TX_IDLE );
|
||||
|
||||
/* Always read the character. */
|
||||
xStatus = xMBPortSerialGetByte( ( CHAR * ) & ucByte );
|
||||
|
||||
switch ( eRcvState )
|
||||
{
|
||||
/* If we have received a character in the init state we have to
|
||||
* wait until the frame is finished.
|
||||
*/
|
||||
case STATE_RX_INIT:
|
||||
vMBPortTimersEnable( );
|
||||
break;
|
||||
|
||||
/* In the error state we wait until all characters in the
|
||||
* damaged frame are transmitted.
|
||||
*/
|
||||
case STATE_RX_ERROR:
|
||||
vMBPortTimersEnable( );
|
||||
break;
|
||||
|
||||
/* In the idle state we wait for a new character. If a character
|
||||
* is received the t1.5 and t3.5 timers are started and the
|
||||
* receiver is in the state STATE_RX_RCV.
|
||||
*/
|
||||
case STATE_RX_IDLE:
|
||||
usRcvBufferPos = 0;
|
||||
ucRTUBuf[usRcvBufferPos++] = ucByte;
|
||||
eRcvState = STATE_RX_RCV;
|
||||
|
||||
/* Enable t3.5 timers. */
|
||||
vMBPortTimersEnable( );
|
||||
break;
|
||||
|
||||
/* We are currently receiving a frame. Reset the timer after
|
||||
* every character received. If more than the maximum possible
|
||||
* number of bytes in a modbus frame is received the frame is
|
||||
* ignored.
|
||||
*/
|
||||
case STATE_RX_RCV:
|
||||
if( usRcvBufferPos < MB_SER_PDU_SIZE_MAX )
|
||||
{
|
||||
if( xStatus ) {
|
||||
ucRTUBuf[usRcvBufferPos++] = ucByte;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eRcvState = STATE_RX_ERROR;
|
||||
}
|
||||
vMBPortTimersEnable( );
|
||||
break;
|
||||
}
|
||||
|
||||
return xStatus;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBRTUTransmitFSM( void )
|
||||
{
|
||||
BOOL xNeedPoll = TRUE;
|
||||
|
||||
assert( eRcvState == STATE_RX_IDLE );
|
||||
|
||||
switch ( eSndState )
|
||||
{
|
||||
/* We should not get a transmitter event if the transmitter is in
|
||||
* idle state. */
|
||||
case STATE_TX_IDLE:
|
||||
break;
|
||||
|
||||
case STATE_TX_XMIT:
|
||||
/* check if we are finished. */
|
||||
if( usSndBufferCount != 0 )
|
||||
{
|
||||
xMBPortSerialPutByte( ( CHAR )*pucSndBufferCur );
|
||||
pucSndBufferCur++; /* next byte in sendbuffer. */
|
||||
usSndBufferCount--;
|
||||
}
|
||||
else
|
||||
{
|
||||
xMBPortEventPost( EV_FRAME_TRANSMIT );
|
||||
xNeedPoll = FALSE;
|
||||
eSndState = STATE_TX_IDLE;
|
||||
vMBPortTimersEnable( );
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
return xNeedPoll;
|
||||
}
|
||||
|
||||
BOOL MB_PORT_ISR_ATTR
|
||||
xMBRTUTimerT35Expired( void )
|
||||
{
|
||||
BOOL xNeedPoll = FALSE;
|
||||
|
||||
switch ( eRcvState )
|
||||
{
|
||||
/* Timer t35 expired. Startup phase is finished. */
|
||||
case STATE_RX_INIT:
|
||||
xNeedPoll = xMBPortEventPost( EV_READY );
|
||||
break;
|
||||
|
||||
/* A frame was received and t35 expired. Notify the listener that
|
||||
* a new frame was received. */
|
||||
case STATE_RX_RCV:
|
||||
xNeedPoll = xMBPortEventPost( EV_FRAME_RECEIVED );
|
||||
break;
|
||||
|
||||
/* An error occured while receiving the frame. */
|
||||
case STATE_RX_ERROR:
|
||||
break;
|
||||
|
||||
/* Function called in an illegal state. */
|
||||
default:
|
||||
assert( ( eRcvState == STATE_RX_IDLE ) || ( eRcvState == STATE_RX_ERROR ) );
|
||||
}
|
||||
|
||||
vMBPortTimersDisable( );
|
||||
eRcvState = STATE_RX_IDLE;
|
||||
|
||||
return xNeedPoll;
|
||||
}
|
||||
#endif
|
||||
@@ -0,0 +1,76 @@
|
||||
/*
|
||||
* SPDX-FileCopyrightText: 2006 Christian Walter
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-3-Clause
|
||||
*
|
||||
* SPDX-FileContributor: 2016-2021 Espressif Systems (Shanghai) CO LTD
|
||||
*/
|
||||
/*
|
||||
* 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: mbrtu.h,v 1.9 2006/12/07 22:10:34 wolti Exp $
|
||||
*/
|
||||
#include "mbconfig.h"
|
||||
|
||||
#ifndef _MB_RTU_H
|
||||
#define _MB_RTU_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_SER_PDU_SIZE_MIN 4 /*!< Minimum size of a Modbus RTU frame. */
|
||||
|
||||
#if MB_SLAVE_RTU_ENABLED
|
||||
eMBErrorCode eMBRTUInit( UCHAR slaveAddress, UCHAR ucPort, ULONG ulBaudRate,
|
||||
eMBParity eParity );
|
||||
void eMBRTUStart( void );
|
||||
void eMBRTUStop( void );
|
||||
eMBErrorCode eMBRTUReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame, USHORT * pusLength );
|
||||
eMBErrorCode eMBRTUSend( UCHAR slaveAddress, const UCHAR * pucFrame, USHORT usLength );
|
||||
BOOL xMBRTUReceiveFSM( void );
|
||||
BOOL xMBRTUTransmitFSM( void );
|
||||
BOOL xMBRTUTimerT15Expired( void );
|
||||
BOOL xMBRTUTimerT35Expired( void );
|
||||
#endif
|
||||
|
||||
#if MB_MASTER_RTU_ENABLED
|
||||
eMBErrorCode eMBMasterRTUInit( UCHAR ucPort, ULONG ulBaudRate,eMBParity eParity );
|
||||
void eMBMasterRTUStart( void );
|
||||
void eMBMasterRTUStop( void );
|
||||
eMBErrorCode eMBMasterRTUReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame, USHORT * pusLength );
|
||||
eMBErrorCode eMBMasterRTUSend( UCHAR slaveAddress, const UCHAR * pucFrame, USHORT usLength );
|
||||
BOOL xMBMasterRTUReceiveFSM( void );
|
||||
BOOL xMBMasterRTUTransmitFSM( void );
|
||||
BOOL xMBMasterRTUTimerExpired( void );
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,439 @@
|
||||
/*
|
||||
* SPDX-FileCopyrightText: 2013 Armink
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-3-Clause
|
||||
*
|
||||
* SPDX-FileContributor: 2016-2021 Espressif Systems (Shanghai) CO LTD
|
||||
*/
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2013 China Beijing Armink <armink.ztl@gmail.com>
|
||||
* 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: mbrtu_m.c,v 1.60 2013/08/17 11:42:56 Armink Add Master Functions $
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
#include "stdio.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
|
||||
#include "mb_m.h"
|
||||
#include "mbrtu.h"
|
||||
#include "mbframe.h"
|
||||
|
||||
#include "mbcrc.h"
|
||||
#include "mbport.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_RTU_SER_PDU_SIZE_MIN 4 /*!< Minimum size of a Modbus RTU frame. */
|
||||
|
||||
/* ----------------------- Type definitions ---------------------------------*/
|
||||
typedef enum
|
||||
{
|
||||
STATE_M_RX_INIT, /*!< Receiver is in initial state. */
|
||||
STATE_M_RX_IDLE, /*!< Receiver is in idle state. */
|
||||
STATE_M_RX_RCV, /*!< Frame is beeing received. */
|
||||
STATE_M_RX_ERROR, /*!< If the frame is invalid. */
|
||||
} eMBMasterRcvState;
|
||||
|
||||
typedef enum
|
||||
{
|
||||
STATE_M_TX_IDLE, /*!< Transmitter is in idle state. */
|
||||
STATE_M_TX_XMIT, /*!< Transmitter is in transfer state. */
|
||||
STATE_M_TX_XFWR, /*!< Transmitter is in transfer finish and wait receive state. */
|
||||
} eMBMasterSndState;
|
||||
|
||||
#if MB_MASTER_RTU_ENABLED > 0
|
||||
/*------------------------ Shared variables ---------------------------------*/
|
||||
extern volatile UCHAR ucMasterRcvBuf[];
|
||||
extern volatile UCHAR ucMasterSndBuf[];
|
||||
|
||||
/* ----------------------- Static variables ---------------------------------*/
|
||||
static volatile eMBMasterSndState eSndState;
|
||||
static volatile eMBMasterRcvState eRcvState;
|
||||
|
||||
static volatile UCHAR *pucMasterSndBufferCur;
|
||||
static volatile USHORT usMasterSndBufferCount;
|
||||
static volatile USHORT usMasterRcvBufferPos;
|
||||
|
||||
static volatile UCHAR *ucMasterRTURcvBuf = ucMasterRcvBuf;
|
||||
static volatile UCHAR *ucMasterRTUSndBuf = ucMasterSndBuf;
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
eMBErrorCode
|
||||
eMBMasterRTUInit(UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
ULONG usTimerT35_50us;
|
||||
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
|
||||
/* Modbus RTU uses 8 Databits. */
|
||||
if( xMBMasterPortSerialInit( ucPort, ulBaudRate, 8, eParity ) != TRUE )
|
||||
{
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* If baudrate > 19200 then we should use the fixed timer values
|
||||
* t35 = 1750us. Otherwise t35 must be 3.5 times the character time.
|
||||
*/
|
||||
if( ulBaudRate > 19200 )
|
||||
{
|
||||
usTimerT35_50us = 35; /* 1800us. */
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The timer reload value for a character is given by:
|
||||
*
|
||||
* ChTimeValue = Ticks_per_1s / ( Baudrate / 11 )
|
||||
* = 11 * Ticks_per_1s / Baudrate
|
||||
* = 220000 / Baudrate
|
||||
* The reload for t3.5 is 1.5 times this value and similary
|
||||
* for t3.5.
|
||||
*/
|
||||
usTimerT35_50us = ( 7UL * 220000UL ) / ( 2UL * ulBaudRate );
|
||||
}
|
||||
if( xMBMasterPortTimersInit( ( USHORT ) usTimerT35_50us ) != TRUE )
|
||||
{
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
}
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
void
|
||||
eMBMasterRTUStart( void )
|
||||
{
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
/* Initially the receiver is in the state STATE_M_RX_INIT. we start
|
||||
* the timer and if no character is received within t3.5 we change
|
||||
* to STATE_M_RX_IDLE. This makes sure that we delay startup of the
|
||||
* modbus protocol stack until the bus is free.
|
||||
*/
|
||||
eRcvState = STATE_M_RX_INIT;
|
||||
vMBMasterPortSerialEnable( TRUE, FALSE );
|
||||
vMBMasterPortTimersT35Enable( );
|
||||
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
}
|
||||
|
||||
void
|
||||
eMBMasterRTUStop( void )
|
||||
{
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
vMBMasterPortSerialEnable( FALSE, FALSE );
|
||||
vMBMasterPortTimersDisable( );
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBMasterRTUReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame, USHORT * pusLength )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
UCHAR *pucMBRTUFrame = ( UCHAR* ) ucMasterRTURcvBuf;
|
||||
USHORT usFrameLength = usMasterRcvBufferPos;
|
||||
|
||||
if( xMBMasterPortSerialGetResponse( &pucMBRTUFrame, &usFrameLength ) == FALSE )
|
||||
{
|
||||
return MB_EIO;
|
||||
}
|
||||
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
assert( usFrameLength < MB_SER_PDU_SIZE_MAX );
|
||||
assert( pucMBRTUFrame );
|
||||
|
||||
/* Length and CRC check */
|
||||
if( ( usFrameLength >= MB_RTU_SER_PDU_SIZE_MIN )
|
||||
&& ( usMBCRC16( ( UCHAR * ) pucMBRTUFrame, usFrameLength ) == 0 ) )
|
||||
{
|
||||
/* Save the address field. All frames are passed to the upper layer
|
||||
* and the decision if a frame is used is done there.
|
||||
*/
|
||||
*pucRcvAddress = pucMBRTUFrame[MB_SER_PDU_ADDR_OFF];
|
||||
|
||||
/* Total length of Modbus-PDU is Modbus-Serial-Line-PDU minus
|
||||
* size of address field and CRC checksum.
|
||||
*/
|
||||
*pusLength = ( USHORT )( usFrameLength - MB_SER_PDU_PDU_OFF - MB_SER_PDU_SIZE_CRC );
|
||||
|
||||
/* Return the start of the Modbus PDU to the caller. */
|
||||
*pucFrame = ( UCHAR * ) & pucMBRTUFrame[MB_SER_PDU_PDU_OFF];
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBMasterRTUSend( UCHAR ucSlaveAddress, const UCHAR * pucFrame, USHORT usLength )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
USHORT usCRC16;
|
||||
|
||||
if ( ucSlaveAddress > MB_MASTER_TOTAL_SLAVE_NUM ) return MB_EINVAL;
|
||||
|
||||
/* Check if the receiver is still in idle state. If not we where to
|
||||
* slow with processing the received frame and the master sent another
|
||||
* frame on the network. We have to abort sending the frame.
|
||||
*/
|
||||
if( eRcvState == STATE_M_RX_IDLE )
|
||||
{
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
/* First byte before the Modbus-PDU is the slave address. */
|
||||
pucMasterSndBufferCur = ( UCHAR * ) pucFrame - 1;
|
||||
usMasterSndBufferCount = 1;
|
||||
|
||||
/* Now copy the Modbus-PDU into the Modbus-Serial-Line-PDU. */
|
||||
pucMasterSndBufferCur[MB_SER_PDU_ADDR_OFF] = ucSlaveAddress;
|
||||
usMasterSndBufferCount += usLength;
|
||||
|
||||
/* Calculate CRC16 checksum for Modbus-Serial-Line-PDU. */
|
||||
usCRC16 = usMBCRC16( ( UCHAR * ) pucMasterSndBufferCur, usMasterSndBufferCount );
|
||||
pucMasterSndBufferCur[usMasterSndBufferCount++] = ( UCHAR )( usCRC16 & 0xFF );
|
||||
pucMasterSndBufferCur[usMasterSndBufferCount++] = ( UCHAR )( usCRC16 >> 8 );
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
|
||||
/* Activate the transmitter. */
|
||||
eSndState = STATE_M_TX_XMIT;
|
||||
|
||||
if ( xMBMasterPortSerialSendRequest( ( UCHAR * ) pucMasterSndBufferCur, usMasterSndBufferCount ) == FALSE )
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
|
||||
// The place to enable RS485 driver
|
||||
vMBMasterPortSerialEnable( FALSE, TRUE );
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBMasterRTUReceiveFSM( void )
|
||||
{
|
||||
BOOL xStatus = FALSE;
|
||||
UCHAR ucByte;
|
||||
|
||||
if ( ( eSndState != STATE_M_TX_IDLE ) && ( eSndState != STATE_M_TX_XFWR ) ) {
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
/* Always read the character. */
|
||||
xStatus = xMBMasterPortSerialGetByte( ( CHAR * ) & ucByte );
|
||||
|
||||
switch ( eRcvState )
|
||||
{
|
||||
/* If we have received a character in the init state we have to
|
||||
* wait until the frame is finished.
|
||||
*/
|
||||
case STATE_M_RX_INIT:
|
||||
vMBMasterPortTimersT35Enable( );
|
||||
ESP_LOGD("DBG", "Start initialization phase.");
|
||||
break;
|
||||
|
||||
/* In the error state we wait until all characters in the
|
||||
* damaged frame are transmitted.
|
||||
*/
|
||||
case STATE_M_RX_ERROR:
|
||||
vMBMasterPortTimersT35Enable( );
|
||||
break;
|
||||
|
||||
/* In the idle state we wait for a new character. If a character
|
||||
* is received the t1.5 and t3.5 timers are started and the
|
||||
* receiver is in the state STATE_M_RX_RCV and disable early
|
||||
* the timer of respond timeout .
|
||||
*/
|
||||
case STATE_M_RX_IDLE:
|
||||
/* In time of respond timeout,the receiver receive a frame.
|
||||
* Disable timer of respond timeout and change the transmiter state to idle.
|
||||
*/
|
||||
vMBMasterPortTimersDisable( );
|
||||
|
||||
usMasterRcvBufferPos = 0;
|
||||
if( xStatus && ucByte ) {
|
||||
ucMasterRTURcvBuf[usMasterRcvBufferPos++] = ucByte;
|
||||
eRcvState = STATE_M_RX_RCV;
|
||||
eSndState = STATE_M_TX_IDLE;
|
||||
}
|
||||
|
||||
/* Enable t3.5 timers. */
|
||||
#if CONFIG_FMB_TIMER_PORT_ENABLED
|
||||
vMBMasterPortTimersT35Enable( );
|
||||
#endif
|
||||
break;
|
||||
|
||||
/* We are currently receiving a frame. Reset the timer after
|
||||
* every character received. If more than the maximum possible
|
||||
* number of bytes in a modbus frame is received the frame is
|
||||
* ignored.
|
||||
*/
|
||||
case STATE_M_RX_RCV:
|
||||
if( usMasterRcvBufferPos < MB_SER_PDU_SIZE_MAX )
|
||||
{
|
||||
if ( xStatus ) {
|
||||
ucMasterRTURcvBuf[usMasterRcvBufferPos++] = ucByte;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eRcvState = STATE_M_RX_ERROR;
|
||||
}
|
||||
#if CONFIG_FMB_TIMER_PORT_ENABLED
|
||||
vMBMasterPortTimersT35Enable( );
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
return xStatus;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBMasterRTUTransmitFSM( void )
|
||||
{
|
||||
BOOL xNeedPoll = TRUE;
|
||||
BOOL xFrameIsBroadcast = FALSE;
|
||||
|
||||
if ( eRcvState != STATE_M_RX_IDLE ) {
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
switch ( eSndState )
|
||||
{
|
||||
/* We should not get a transmitter event if the transmitter is in
|
||||
* idle state. */
|
||||
case STATE_M_TX_XFWR:
|
||||
xNeedPoll = FALSE;
|
||||
break;
|
||||
|
||||
case STATE_M_TX_IDLE:
|
||||
break;
|
||||
|
||||
case STATE_M_TX_XMIT:
|
||||
/* check if we are finished. */
|
||||
if( usMasterSndBufferCount != 0 )
|
||||
{
|
||||
xMBMasterPortSerialPutByte( ( CHAR )*pucMasterSndBufferCur );
|
||||
pucMasterSndBufferCur++; /* next byte in sendbuffer. */
|
||||
usMasterSndBufferCount--;
|
||||
}
|
||||
else
|
||||
{
|
||||
xFrameIsBroadcast = ( ucMasterRTUSndBuf[MB_SEND_BUF_PDU_OFF - MB_SER_PDU_PDU_OFF]
|
||||
== MB_ADDRESS_BROADCAST ) ? TRUE : FALSE;
|
||||
vMBMasterRequestSetType( xFrameIsBroadcast );
|
||||
eSndState = STATE_M_TX_XFWR;
|
||||
/* If the frame is broadcast ,master will enable timer of convert delay,
|
||||
* else master will enable timer of respond timeout. */
|
||||
if ( xFrameIsBroadcast == TRUE )
|
||||
{
|
||||
vMBMasterPortTimersConvertDelayEnable( );
|
||||
}
|
||||
else
|
||||
{
|
||||
vMBMasterPortTimersRespondTimeoutEnable( );
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
return xNeedPoll;
|
||||
}
|
||||
|
||||
BOOL MB_PORT_ISR_ATTR
|
||||
xMBMasterRTUTimerExpired(void)
|
||||
{
|
||||
BOOL xNeedPoll = FALSE;
|
||||
|
||||
switch (eRcvState)
|
||||
{
|
||||
/* Timer t35 expired. Startup phase is finished. */
|
||||
case STATE_M_RX_INIT:
|
||||
xNeedPoll = xMBMasterPortEventPost(EV_MASTER_READY);
|
||||
ESP_EARLY_LOGD("DBG", "RTU timer, init FSM state.");
|
||||
break;
|
||||
|
||||
/* A frame was received and t35 expired. Notify the listener that
|
||||
* a new frame was received. */
|
||||
case STATE_M_RX_RCV:
|
||||
xNeedPoll = xMBMasterPortEventPost(EV_MASTER_FRAME_RECEIVED);
|
||||
break;
|
||||
|
||||
/* An error occured while receiving the frame. */
|
||||
case STATE_M_RX_ERROR:
|
||||
vMBMasterSetErrorType(EV_ERROR_RECEIVE_DATA);
|
||||
xNeedPoll = xMBMasterPortEventPost(EV_MASTER_ERROR_PROCESS);
|
||||
break;
|
||||
|
||||
/* Function called in an illegal state. */
|
||||
default:
|
||||
assert(eRcvState == STATE_M_RX_IDLE);
|
||||
break;
|
||||
}
|
||||
eRcvState = STATE_M_RX_IDLE;
|
||||
|
||||
switch (eSndState)
|
||||
{
|
||||
/* A frame was send finish and convert delay or respond timeout expired.
|
||||
* If the frame is broadcast,The master will idle,and if the frame is not
|
||||
* broadcast. Notify the listener process error.*/
|
||||
case STATE_M_TX_XFWR:
|
||||
if ( xMBMasterRequestIsBroadcast( ) == FALSE ) {
|
||||
vMBMasterSetErrorType(EV_ERROR_RESPOND_TIMEOUT);
|
||||
xNeedPoll = xMBMasterPortEventPost(EV_MASTER_ERROR_PROCESS);
|
||||
}
|
||||
break;
|
||||
/* Function called in an illegal state. */
|
||||
default:
|
||||
assert( ( eSndState == STATE_M_TX_XMIT ) || ( eSndState == STATE_M_TX_IDLE ));
|
||||
break;
|
||||
}
|
||||
eSndState = STATE_M_TX_IDLE;
|
||||
|
||||
vMBMasterPortTimersDisable( );
|
||||
/* If timer mode is convert delay, the master event then turns EV_MASTER_EXECUTE status. */
|
||||
if (xMBMasterGetCurTimerMode() == MB_TMODE_CONVERT_DELAY) {
|
||||
xNeedPoll = xMBMasterPortEventPost(EV_MASTER_EXECUTE);
|
||||
}
|
||||
|
||||
return xNeedPoll;
|
||||
}
|
||||
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user