Tom Martins / Mbed OS Probleme_implementation_lwip

test public

Fork of Modbus by Cam Marshall

mbtcp.cpp@1:a3ee8cb24540, 2018-07-02 (annotated)

Committer:
TomTom83
Date:
Mon Jul 02 14:36:46 2018 +0000
Revision:
1:a3ee8cb24540
adaptation de bafian modbus

Who changed what in which revision?

UserRevisionLine numberNew contents of line
TomTom83 1:a3ee8cb24540 1 /*
TomTom83 1:a3ee8cb24540 2 * FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
TomTom83 1:a3ee8cb24540 3 * Copyright (c) 2006 Christian Walter <wolti@sil.at>
TomTom83 1:a3ee8cb24540 4 * All rights reserved.
TomTom83 1:a3ee8cb24540 5 *
TomTom83 1:a3ee8cb24540 6 * Redistribution and use in source and binary forms, with or without
TomTom83 1:a3ee8cb24540 7 * modification, are permitted provided that the following conditions
TomTom83 1:a3ee8cb24540 8 * are met:
TomTom83 1:a3ee8cb24540 9 * 1. Redistributions of source code must retain the above copyright
TomTom83 1:a3ee8cb24540 10 * notice, this list of conditions and the following disclaimer.
TomTom83 1:a3ee8cb24540 11 * 2. Redistributions in binary form must reproduce the above copyright
TomTom83 1:a3ee8cb24540 12 * notice, this list of conditions and the following disclaimer in the
TomTom83 1:a3ee8cb24540 13 * documentation and/or other materials provided with the distribution.
TomTom83 1:a3ee8cb24540 14 * 3. The name of the author may not be used to endorse or promote products
TomTom83 1:a3ee8cb24540 15 * derived from this software without specific prior written permission.
TomTom83 1:a3ee8cb24540 16 *
TomTom83 1:a3ee8cb24540 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
TomTom83 1:a3ee8cb24540 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
TomTom83 1:a3ee8cb24540 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
TomTom83 1:a3ee8cb24540 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
TomTom83 1:a3ee8cb24540 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
TomTom83 1:a3ee8cb24540 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
TomTom83 1:a3ee8cb24540 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
TomTom83 1:a3ee8cb24540 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
TomTom83 1:a3ee8cb24540 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
TomTom83 1:a3ee8cb24540 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
TomTom83 1:a3ee8cb24540 27 *
TomTom83 1:a3ee8cb24540 28 * File: $Id: mbtcp.c,v 1.3 2006/12/07 22:10:34 wolti Exp $
TomTom83 1:a3ee8cb24540 29 */
TomTom83 1:a3ee8cb24540 30
TomTom83 1:a3ee8cb24540 31 /* ----------------------- System includes ----------------------------------*/
TomTom83 1:a3ee8cb24540 32 #include "stdlib.h"
TomTom83 1:a3ee8cb24540 33 #include "string.h"
TomTom83 1:a3ee8cb24540 34
TomTom83 1:a3ee8cb24540 35 /* ----------------------- Platform includes --------------------------------*/
TomTom83 1:a3ee8cb24540 36 #include "port.h"
TomTom83 1:a3ee8cb24540 37
TomTom83 1:a3ee8cb24540 38 /* ----------------------- Modbus includes ----------------------------------*/
TomTom83 1:a3ee8cb24540 39 #include "mb.h"
TomTom83 1:a3ee8cb24540 40 #include "mbconfig.h"
TomTom83 1:a3ee8cb24540 41 #include "mbtcp.h"
TomTom83 1:a3ee8cb24540 42 #include "mbframe.h"
TomTom83 1:a3ee8cb24540 43 #include "mbport.h"
TomTom83 1:a3ee8cb24540 44
TomTom83 1:a3ee8cb24540 45 #if MB_TCP_ENABLED > 0
TomTom83 1:a3ee8cb24540 46
TomTom83 1:a3ee8cb24540 47 /* ----------------------- Defines ------------------------------------------*/
TomTom83 1:a3ee8cb24540 48
TomTom83 1:a3ee8cb24540 49 /* ----------------------- MBAP Header --------------------------------------*/
TomTom83 1:a3ee8cb24540 50 /*
TomTom83 1:a3ee8cb24540 51 *
TomTom83 1:a3ee8cb24540 52 * <------------------------ MODBUS TCP/IP ADU(1) ------------------------->
TomTom83 1:a3ee8cb24540 53 * <----------- MODBUS PDU (1') ---------------->
TomTom83 1:a3ee8cb24540 54 * +-----------+---------------+------------------------------------------+
TomTom83 1:a3ee8cb24540 55 * | TID | PID | Length | UID |Code | Data |
TomTom83 1:a3ee8cb24540 56 * +-----------+---------------+------------------------------------------+
TomTom83 1:a3ee8cb24540 57 * | | | | |
TomTom83 1:a3ee8cb24540 58 * (2) (3) (4) (5) (6)
TomTom83 1:a3ee8cb24540 59 *
TomTom83 1:a3ee8cb24540 60 * (2) ... MB_TCP_TID = 0 (Transaction Identifier - 2 Byte)
TomTom83 1:a3ee8cb24540 61 * (3) ... MB_TCP_PID = 2 (Protocol Identifier - 2 Byte)
TomTom83 1:a3ee8cb24540 62 * (4) ... MB_TCP_LEN = 4 (Number of bytes - 2 Byte)
TomTom83 1:a3ee8cb24540 63 * (5) ... MB_TCP_UID = 6 (Unit Identifier - 1 Byte)
TomTom83 1:a3ee8cb24540 64 * (6) ... MB_TCP_FUNC = 7 (Modbus Function Code)
TomTom83 1:a3ee8cb24540 65 *
TomTom83 1:a3ee8cb24540 66 * (1) ... Modbus TCP/IP Application Data Unit
TomTom83 1:a3ee8cb24540 67 * (1') ... Modbus Protocol Data Unit
TomTom83 1:a3ee8cb24540 68 */
TomTom83 1:a3ee8cb24540 69
TomTom83 1:a3ee8cb24540 70 #define MB_TCP_TID 0
TomTom83 1:a3ee8cb24540 71 #define MB_TCP_PID 2
TomTom83 1:a3ee8cb24540 72 #define MB_TCP_LEN 4
TomTom83 1:a3ee8cb24540 73 #define MB_TCP_UID 6
TomTom83 1:a3ee8cb24540 74 #define MB_TCP_FUNC 7
TomTom83 1:a3ee8cb24540 75
TomTom83 1:a3ee8cb24540 76 #define MB_TCP_PROTOCOL_ID 0 /* 0 = Modbus Protocol */
TomTom83 1:a3ee8cb24540 77
TomTom83 1:a3ee8cb24540 78
TomTom83 1:a3ee8cb24540 79 /* ----------------------- Start implementation -----------------------------*/
TomTom83 1:a3ee8cb24540 80 eMBErrorCode
TomTom83 1:a3ee8cb24540 81 eMBTCPDoInit( USHORT ucTCPPort )
TomTom83 1:a3ee8cb24540 82 {
TomTom83 1:a3ee8cb24540 83 eMBErrorCode eStatus = MB_ENOERR;
TomTom83 1:a3ee8cb24540 84
TomTom83 1:a3ee8cb24540 85 if( xMBTCPPortInit( ucTCPPort ) == FALSE )
TomTom83 1:a3ee8cb24540 86 {
TomTom83 1:a3ee8cb24540 87 eStatus = MB_EPORTERR;
TomTom83 1:a3ee8cb24540 88 }
TomTom83 1:a3ee8cb24540 89 return eStatus;
TomTom83 1:a3ee8cb24540 90 }
TomTom83 1:a3ee8cb24540 91
TomTom83 1:a3ee8cb24540 92 void
TomTom83 1:a3ee8cb24540 93 eMBTCPStart( void )
TomTom83 1:a3ee8cb24540 94 {
TomTom83 1:a3ee8cb24540 95 }
TomTom83 1:a3ee8cb24540 96
TomTom83 1:a3ee8cb24540 97 void
TomTom83 1:a3ee8cb24540 98 eMBTCPStop( void )
TomTom83 1:a3ee8cb24540 99 {
TomTom83 1:a3ee8cb24540 100 /* Make sure that no more clients are connected. */
TomTom83 1:a3ee8cb24540 101 vMBTCPPortDisable( );
TomTom83 1:a3ee8cb24540 102 }
TomTom83 1:a3ee8cb24540 103
TomTom83 1:a3ee8cb24540 104 eMBErrorCode
TomTom83 1:a3ee8cb24540 105 eMBTCPReceive( UCHAR * pucRcvAddress, UCHAR ** ppucFrame, USHORT * pusLength )
TomTom83 1:a3ee8cb24540 106 {
TomTom83 1:a3ee8cb24540 107 eMBErrorCode eStatus = MB_EIO;
TomTom83 1:a3ee8cb24540 108 UCHAR *pucMBTCPFrame;
TomTom83 1:a3ee8cb24540 109 USHORT usLength;
TomTom83 1:a3ee8cb24540 110 USHORT usPID;
TomTom83 1:a3ee8cb24540 111
TomTom83 1:a3ee8cb24540 112 if( xMBTCPPortGetRequest( &pucMBTCPFrame, &usLength ) != FALSE )
TomTom83 1:a3ee8cb24540 113 {
TomTom83 1:a3ee8cb24540 114 usPID = pucMBTCPFrame[MB_TCP_PID] << 8U;
TomTom83 1:a3ee8cb24540 115 usPID |= pucMBTCPFrame[MB_TCP_PID + 1];
TomTom83 1:a3ee8cb24540 116
TomTom83 1:a3ee8cb24540 117 if( usPID == MB_TCP_PROTOCOL_ID )
TomTom83 1:a3ee8cb24540 118 {
TomTom83 1:a3ee8cb24540 119 *ppucFrame = &pucMBTCPFrame[MB_TCP_FUNC];
TomTom83 1:a3ee8cb24540 120 *pusLength = usLength - MB_TCP_FUNC;
TomTom83 1:a3ee8cb24540 121 eStatus = MB_ENOERR;
TomTom83 1:a3ee8cb24540 122
TomTom83 1:a3ee8cb24540 123 /* Modbus TCP does not use any addresses. Fake the source address such
TomTom83 1:a3ee8cb24540 124 * that the processing part deals with this frame.
TomTom83 1:a3ee8cb24540 125 */
TomTom83 1:a3ee8cb24540 126 *pucRcvAddress = MB_TCP_PSEUDO_ADDRESS;
TomTom83 1:a3ee8cb24540 127 }
TomTom83 1:a3ee8cb24540 128 }
TomTom83 1:a3ee8cb24540 129 else
TomTom83 1:a3ee8cb24540 130 {
TomTom83 1:a3ee8cb24540 131 eStatus = MB_EIO;
TomTom83 1:a3ee8cb24540 132 }
TomTom83 1:a3ee8cb24540 133 return eStatus;
TomTom83 1:a3ee8cb24540 134 }
TomTom83 1:a3ee8cb24540 135
TomTom83 1:a3ee8cb24540 136 eMBErrorCode
TomTom83 1:a3ee8cb24540 137 eMBTCPSend( UCHAR _unused, const UCHAR * pucFrame, USHORT usLength )
TomTom83 1:a3ee8cb24540 138 {
TomTom83 1:a3ee8cb24540 139 eMBErrorCode eStatus = MB_ENOERR;
TomTom83 1:a3ee8cb24540 140 UCHAR *pucMBTCPFrame = ( UCHAR * ) pucFrame - MB_TCP_FUNC;
TomTom83 1:a3ee8cb24540 141 USHORT usTCPLength = usLength + MB_TCP_FUNC;
TomTom83 1:a3ee8cb24540 142
TomTom83 1:a3ee8cb24540 143 /* The MBAP header is already initialized because the caller calls this
TomTom83 1:a3ee8cb24540 144 * function with the buffer returned by the previous call. Therefore we
TomTom83 1:a3ee8cb24540 145 * only have to update the length in the header. Note that the length
TomTom83 1:a3ee8cb24540 146 * header includes the size of the Modbus PDU and the UID Byte. Therefore
TomTom83 1:a3ee8cb24540 147 * the length is usLength plus one.
TomTom83 1:a3ee8cb24540 148 */
TomTom83 1:a3ee8cb24540 149 pucMBTCPFrame[MB_TCP_LEN] = ( usLength + 1 ) >> 8U;
TomTom83 1:a3ee8cb24540 150 pucMBTCPFrame[MB_TCP_LEN + 1] = ( usLength + 1 ) & 0xFF;
TomTom83 1:a3ee8cb24540 151 if( xMBTCPPortSendResponse( pucMBTCPFrame, usTCPLength ) == FALSE )
TomTom83 1:a3ee8cb24540 152 {
TomTom83 1:a3ee8cb24540 153 eStatus = MB_EIO;
TomTom83 1:a3ee8cb24540 154 }
TomTom83 1:a3ee8cb24540 155 return eStatus;
TomTom83 1:a3ee8cb24540 156 }
TomTom83 1:a3ee8cb24540 157
TomTom83 1:a3ee8cb24540 158 #endif
TomTom83 1:a3ee8cb24540 159