fork frdm kl25z slave
mb.cpp@8:aa64e731174a, 2022-04-01 (annotated)
- Committer:
- jlsalvat
- Date:
- Fri Apr 01 17:35:58 2022 +0000
- Revision:
- 8:aa64e731174a
- Parent:
- 3:419ee4c5e10f
change for frdm-kl25Z
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
giryan | 0:274eb57e1df3 | 1 | /* |
giryan | 0:274eb57e1df3 | 2 | * FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU. |
giryan | 0:274eb57e1df3 | 3 | * Copyright (c) 2006 Christian Walter <wolti@sil.at> |
giryan | 0:274eb57e1df3 | 4 | * All rights reserved. |
giryan | 0:274eb57e1df3 | 5 | * |
giryan | 0:274eb57e1df3 | 6 | * Redistribution and use in source and binary forms, with or without |
giryan | 0:274eb57e1df3 | 7 | * modification, are permitted provided that the following conditions |
giryan | 0:274eb57e1df3 | 8 | * are met: |
giryan | 0:274eb57e1df3 | 9 | * 1. Redistributions of source code must retain the above copyright |
giryan | 0:274eb57e1df3 | 10 | * notice, this list of conditions and the following disclaimer. |
giryan | 0:274eb57e1df3 | 11 | * 2. Redistributions in binary form must reproduce the above copyright |
giryan | 0:274eb57e1df3 | 12 | * notice, this list of conditions and the following disclaimer in the |
giryan | 0:274eb57e1df3 | 13 | * documentation and/or other materials provided with the distribution. |
giryan | 0:274eb57e1df3 | 14 | * 3. The name of the author may not be used to endorse or promote products |
giryan | 0:274eb57e1df3 | 15 | * derived from this software without specific prior written permission. |
giryan | 0:274eb57e1df3 | 16 | * |
giryan | 0:274eb57e1df3 | 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
giryan | 0:274eb57e1df3 | 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
giryan | 0:274eb57e1df3 | 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
giryan | 0:274eb57e1df3 | 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
giryan | 0:274eb57e1df3 | 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
giryan | 0:274eb57e1df3 | 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
giryan | 0:274eb57e1df3 | 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
giryan | 0:274eb57e1df3 | 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
giryan | 0:274eb57e1df3 | 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
giryan | 0:274eb57e1df3 | 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
giryan | 0:274eb57e1df3 | 27 | * |
giryan | 0:274eb57e1df3 | 28 | * File: $Id: mb.c,v 1.27 2007/02/18 23:45:41 wolti Exp $ |
giryan | 0:274eb57e1df3 | 29 | */ |
giryan | 0:274eb57e1df3 | 30 | |
giryan | 0:274eb57e1df3 | 31 | /* ----------------------- System includes ----------------------------------*/ |
giryan | 0:274eb57e1df3 | 32 | #include "stdlib.h" |
giryan | 0:274eb57e1df3 | 33 | #include "string.h" |
giryan | 0:274eb57e1df3 | 34 | |
giryan | 0:274eb57e1df3 | 35 | /* ----------------------- Platform includes --------------------------------*/ |
giryan | 0:274eb57e1df3 | 36 | #include "port.h" |
giryan | 0:274eb57e1df3 | 37 | |
giryan | 0:274eb57e1df3 | 38 | /* ----------------------- Modbus includes ----------------------------------*/ |
giryan | 0:274eb57e1df3 | 39 | #include "mb.h" |
giryan | 0:274eb57e1df3 | 40 | #include "mbconfig.h" |
giryan | 0:274eb57e1df3 | 41 | #include "mbframe.h" |
giryan | 0:274eb57e1df3 | 42 | #include "mbproto.h" |
giryan | 0:274eb57e1df3 | 43 | #include "mbfunc.h" |
giryan | 0:274eb57e1df3 | 44 | #include "mbport.h" |
giryan | 0:274eb57e1df3 | 45 | #if MB_RTU_ENABLED == 1 |
giryan | 0:274eb57e1df3 | 46 | #include "mbrtu.h" |
giryan | 0:274eb57e1df3 | 47 | #endif |
giryan | 0:274eb57e1df3 | 48 | #if MB_ASCII_ENABLED == 1 |
giryan | 0:274eb57e1df3 | 49 | #include "mbascii.h" |
giryan | 0:274eb57e1df3 | 50 | #endif |
giryan | 0:274eb57e1df3 | 51 | #if MB_TCP_ENABLED == 1 |
giryan | 0:274eb57e1df3 | 52 | #include "mbtcp.h" |
giryan | 0:274eb57e1df3 | 53 | #endif |
giryan | 0:274eb57e1df3 | 54 | |
giryan | 0:274eb57e1df3 | 55 | #ifndef MB_PORT_HAS_CLOSE |
giryan | 0:274eb57e1df3 | 56 | #define MB_PORT_HAS_CLOSE 0 |
giryan | 0:274eb57e1df3 | 57 | #endif |
giryan | 0:274eb57e1df3 | 58 | |
giryan | 0:274eb57e1df3 | 59 | /* ----------------------- Static variables ---------------------------------*/ |
giryan | 0:274eb57e1df3 | 60 | |
wclin | 3:419ee4c5e10f | 61 | #include "mbed.h" |
giryan | 0:274eb57e1df3 | 62 | |
giryan | 0:274eb57e1df3 | 63 | static UCHAR ucMBAddress; |
giryan | 0:274eb57e1df3 | 64 | static eMBMode eMBCurrentMode; |
giryan | 0:274eb57e1df3 | 65 | |
giryan | 0:274eb57e1df3 | 66 | static enum { |
giryan | 0:274eb57e1df3 | 67 | STATE_ENABLED, |
giryan | 0:274eb57e1df3 | 68 | STATE_DISABLED, |
giryan | 0:274eb57e1df3 | 69 | STATE_NOT_INITIALIZED |
giryan | 0:274eb57e1df3 | 70 | } eMBState = STATE_NOT_INITIALIZED; |
giryan | 0:274eb57e1df3 | 71 | |
giryan | 0:274eb57e1df3 | 72 | /* Functions pointer which are initialized in eMBInit( ). Depending on the |
giryan | 0:274eb57e1df3 | 73 | * mode (RTU or ASCII) the are set to the correct implementations. |
giryan | 0:274eb57e1df3 | 74 | */ |
giryan | 0:274eb57e1df3 | 75 | static peMBFrameSend peMBFrameSendCur; |
giryan | 0:274eb57e1df3 | 76 | static pvMBFrameStart pvMBFrameStartCur; |
giryan | 0:274eb57e1df3 | 77 | static pvMBFrameStop pvMBFrameStopCur; |
giryan | 0:274eb57e1df3 | 78 | static peMBFrameReceive peMBFrameReceiveCur; |
giryan | 0:274eb57e1df3 | 79 | static pvMBFrameClose pvMBFrameCloseCur; |
giryan | 0:274eb57e1df3 | 80 | |
giryan | 0:274eb57e1df3 | 81 | /* Callback functions required by the porting layer. They are called when |
giryan | 0:274eb57e1df3 | 82 | * an external event has happend which includes a timeout or the reception |
giryan | 0:274eb57e1df3 | 83 | * or transmission of a character. |
giryan | 0:274eb57e1df3 | 84 | */ |
giryan | 0:274eb57e1df3 | 85 | BOOL( *pxMBFrameCBByteReceived ) ( void ); |
giryan | 0:274eb57e1df3 | 86 | BOOL( *pxMBFrameCBTransmitterEmpty ) ( void ); |
giryan | 0:274eb57e1df3 | 87 | BOOL( *pxMBPortCBTimerExpired ) ( void ); |
giryan | 0:274eb57e1df3 | 88 | |
giryan | 0:274eb57e1df3 | 89 | BOOL( *pxMBFrameCBReceiveFSMCur ) ( void ); |
giryan | 0:274eb57e1df3 | 90 | BOOL( *pxMBFrameCBTransmitFSMCur ) ( void ); |
giryan | 0:274eb57e1df3 | 91 | |
giryan | 0:274eb57e1df3 | 92 | /* An array of Modbus functions handlers which associates Modbus function |
giryan | 0:274eb57e1df3 | 93 | * codes with implementing functions. |
giryan | 0:274eb57e1df3 | 94 | */ |
giryan | 0:274eb57e1df3 | 95 | static xMBFunctionHandler xFuncHandlers[MB_FUNC_HANDLERS_MAX] = { |
giryan | 0:274eb57e1df3 | 96 | #if MB_FUNC_OTHER_REP_SLAVEID_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 97 | {MB_FUNC_OTHER_REPORT_SLAVEID, eMBFuncReportSlaveID}, |
giryan | 0:274eb57e1df3 | 98 | #endif |
giryan | 0:274eb57e1df3 | 99 | #if MB_FUNC_READ_INPUT_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 100 | {MB_FUNC_READ_INPUT_REGISTER, eMBFuncReadInputRegister}, |
giryan | 0:274eb57e1df3 | 101 | #endif |
giryan | 0:274eb57e1df3 | 102 | #if MB_FUNC_READ_HOLDING_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 103 | {MB_FUNC_READ_HOLDING_REGISTER, eMBFuncReadHoldingRegister}, |
giryan | 0:274eb57e1df3 | 104 | #endif |
giryan | 0:274eb57e1df3 | 105 | #if MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 106 | {MB_FUNC_WRITE_MULTIPLE_REGISTERS, eMBFuncWriteMultipleHoldingRegister}, |
giryan | 0:274eb57e1df3 | 107 | #endif |
giryan | 0:274eb57e1df3 | 108 | #if MB_FUNC_WRITE_HOLDING_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 109 | {MB_FUNC_WRITE_REGISTER, eMBFuncWriteHoldingRegister}, |
giryan | 0:274eb57e1df3 | 110 | #endif |
giryan | 0:274eb57e1df3 | 111 | #if MB_FUNC_READWRITE_HOLDING_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 112 | {MB_FUNC_READWRITE_MULTIPLE_REGISTERS, eMBFuncReadWriteMultipleHoldingRegister}, |
giryan | 0:274eb57e1df3 | 113 | #endif |
giryan | 0:274eb57e1df3 | 114 | #if MB_FUNC_READ_COILS_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 115 | {MB_FUNC_READ_COILS, eMBFuncReadCoils}, |
giryan | 0:274eb57e1df3 | 116 | #endif |
giryan | 0:274eb57e1df3 | 117 | #if MB_FUNC_WRITE_COIL_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 118 | {MB_FUNC_WRITE_SINGLE_COIL, eMBFuncWriteCoil}, |
giryan | 0:274eb57e1df3 | 119 | #endif |
giryan | 0:274eb57e1df3 | 120 | #if MB_FUNC_WRITE_MULTIPLE_COILS_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 121 | {MB_FUNC_WRITE_MULTIPLE_COILS, eMBFuncWriteMultipleCoils}, |
giryan | 0:274eb57e1df3 | 122 | #endif |
giryan | 0:274eb57e1df3 | 123 | #if MB_FUNC_READ_DISCRETE_INPUTS_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 124 | {MB_FUNC_READ_DISCRETE_INPUTS, eMBFuncReadDiscreteInputs}, |
giryan | 0:274eb57e1df3 | 125 | #endif |
giryan | 0:274eb57e1df3 | 126 | }; |
giryan | 0:274eb57e1df3 | 127 | |
giryan | 0:274eb57e1df3 | 128 | /* ----------------------- Start implementation -----------------------------*/ |
giryan | 0:274eb57e1df3 | 129 | eMBErrorCode |
giryan | 0:274eb57e1df3 | 130 | eMBInit( eMBMode eMode, UCHAR ucSlaveAddress, UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity ) { |
giryan | 0:274eb57e1df3 | 131 | eMBErrorCode eStatus = MB_ENOERR; |
giryan | 0:274eb57e1df3 | 132 | |
giryan | 0:274eb57e1df3 | 133 | /* check preconditions */ |
giryan | 0:274eb57e1df3 | 134 | if ( ( ucSlaveAddress == MB_ADDRESS_BROADCAST ) || |
giryan | 0:274eb57e1df3 | 135 | ( ucSlaveAddress < MB_ADDRESS_MIN ) || ( ucSlaveAddress > MB_ADDRESS_MAX ) ) { |
giryan | 0:274eb57e1df3 | 136 | eStatus = MB_EINVAL; |
giryan | 0:274eb57e1df3 | 137 | } else { |
giryan | 0:274eb57e1df3 | 138 | ucMBAddress = ucSlaveAddress; |
giryan | 0:274eb57e1df3 | 139 | |
giryan | 0:274eb57e1df3 | 140 | switch ( eMode ) { |
giryan | 0:274eb57e1df3 | 141 | #if MB_RTU_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 142 | case MB_RTU: |
giryan | 0:274eb57e1df3 | 143 | pvMBFrameStartCur = eMBRTUStart; |
giryan | 0:274eb57e1df3 | 144 | pvMBFrameStopCur = eMBRTUStop; |
giryan | 0:274eb57e1df3 | 145 | peMBFrameSendCur = eMBRTUSend; |
giryan | 0:274eb57e1df3 | 146 | peMBFrameReceiveCur = eMBRTUReceive; |
giryan | 0:274eb57e1df3 | 147 | pvMBFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBPortClose : NULL; |
giryan | 0:274eb57e1df3 | 148 | pxMBFrameCBByteReceived = xMBRTUReceiveFSM; |
giryan | 0:274eb57e1df3 | 149 | pxMBFrameCBTransmitterEmpty = xMBRTUTransmitFSM; |
giryan | 0:274eb57e1df3 | 150 | pxMBPortCBTimerExpired = xMBRTUTimerT35Expired; |
giryan | 0:274eb57e1df3 | 151 | |
giryan | 0:274eb57e1df3 | 152 | eStatus = eMBRTUInit( ucMBAddress, ucPort, ulBaudRate, eParity ); |
giryan | 0:274eb57e1df3 | 153 | break; |
giryan | 0:274eb57e1df3 | 154 | #endif |
giryan | 0:274eb57e1df3 | 155 | #if MB_ASCII_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 156 | case MB_ASCII: |
giryan | 0:274eb57e1df3 | 157 | pvMBFrameStartCur = eMBASCIIStart; |
giryan | 0:274eb57e1df3 | 158 | pvMBFrameStopCur = eMBASCIIStop; |
giryan | 0:274eb57e1df3 | 159 | peMBFrameSendCur = eMBASCIISend; |
giryan | 0:274eb57e1df3 | 160 | peMBFrameReceiveCur = eMBASCIIReceive; |
giryan | 0:274eb57e1df3 | 161 | pvMBFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBPortClose : NULL; |
giryan | 0:274eb57e1df3 | 162 | pxMBFrameCBByteReceived = xMBASCIIReceiveFSM; |
giryan | 0:274eb57e1df3 | 163 | pxMBFrameCBTransmitterEmpty = xMBASCIITransmitFSM; |
giryan | 0:274eb57e1df3 | 164 | pxMBPortCBTimerExpired = xMBASCIITimerT1SExpired; |
giryan | 0:274eb57e1df3 | 165 | |
giryan | 0:274eb57e1df3 | 166 | eStatus = eMBASCIIInit( ucMBAddress, ucPort, ulBaudRate, eParity ); |
giryan | 0:274eb57e1df3 | 167 | break; |
giryan | 0:274eb57e1df3 | 168 | #endif |
giryan | 0:274eb57e1df3 | 169 | default: |
giryan | 0:274eb57e1df3 | 170 | eStatus = MB_EINVAL; |
giryan | 0:274eb57e1df3 | 171 | } |
giryan | 0:274eb57e1df3 | 172 | |
giryan | 0:274eb57e1df3 | 173 | if ( eStatus == MB_ENOERR ) { |
giryan | 0:274eb57e1df3 | 174 | if ( !xMBPortEventInit( ) ) { |
giryan | 0:274eb57e1df3 | 175 | /* port dependent event module initalization failed. */ |
giryan | 0:274eb57e1df3 | 176 | eStatus = MB_EPORTERR; |
giryan | 0:274eb57e1df3 | 177 | } else { |
giryan | 0:274eb57e1df3 | 178 | eMBCurrentMode = eMode; |
giryan | 0:274eb57e1df3 | 179 | eMBState = STATE_DISABLED; |
giryan | 0:274eb57e1df3 | 180 | } |
giryan | 0:274eb57e1df3 | 181 | } |
giryan | 0:274eb57e1df3 | 182 | } |
giryan | 0:274eb57e1df3 | 183 | return eStatus; |
giryan | 0:274eb57e1df3 | 184 | } |
giryan | 0:274eb57e1df3 | 185 | |
giryan | 0:274eb57e1df3 | 186 | #if MB_TCP_ENABLED > 0 |
giryan | 0:274eb57e1df3 | 187 | eMBErrorCode |
giryan | 0:274eb57e1df3 | 188 | eMBTCPInit( USHORT ucTCPPort ) { |
giryan | 0:274eb57e1df3 | 189 | eMBErrorCode eStatus = MB_ENOERR; |
giryan | 0:274eb57e1df3 | 190 | |
giryan | 0:274eb57e1df3 | 191 | if ( ( eStatus = eMBTCPDoInit( ucTCPPort ) ) != MB_ENOERR ) { |
giryan | 0:274eb57e1df3 | 192 | eMBState = STATE_DISABLED; |
giryan | 0:274eb57e1df3 | 193 | } else if ( !xMBPortEventInit( ) ) { |
giryan | 0:274eb57e1df3 | 194 | /* Port dependent event module initalization failed. */ |
giryan | 0:274eb57e1df3 | 195 | eStatus = MB_EPORTERR; |
giryan | 0:274eb57e1df3 | 196 | } else { |
giryan | 0:274eb57e1df3 | 197 | pvMBFrameStartCur = eMBTCPStart; |
giryan | 0:274eb57e1df3 | 198 | pvMBFrameStopCur = eMBTCPStop; |
giryan | 0:274eb57e1df3 | 199 | peMBFrameReceiveCur = eMBTCPReceive; |
giryan | 0:274eb57e1df3 | 200 | peMBFrameSendCur = eMBTCPSend; |
giryan | 0:274eb57e1df3 | 201 | pvMBFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBTCPPortClose : NULL; |
giryan | 0:274eb57e1df3 | 202 | ucMBAddress = MB_TCP_PSEUDO_ADDRESS; |
giryan | 0:274eb57e1df3 | 203 | eMBCurrentMode = MB_TCP; |
giryan | 0:274eb57e1df3 | 204 | eMBState = STATE_DISABLED; |
giryan | 0:274eb57e1df3 | 205 | } |
giryan | 0:274eb57e1df3 | 206 | return eStatus; |
giryan | 0:274eb57e1df3 | 207 | } |
giryan | 0:274eb57e1df3 | 208 | #endif |
giryan | 0:274eb57e1df3 | 209 | |
giryan | 0:274eb57e1df3 | 210 | |
giryan | 0:274eb57e1df3 | 211 | eMBErrorCode |
giryan | 0:274eb57e1df3 | 212 | eMBRegisterCB( UCHAR ucFunctionCode, pxMBFunctionHandler pxHandler ) { |
giryan | 0:274eb57e1df3 | 213 | int i; |
giryan | 0:274eb57e1df3 | 214 | eMBErrorCode eStatus; |
giryan | 0:274eb57e1df3 | 215 | |
giryan | 0:274eb57e1df3 | 216 | if ( ( 0 < ucFunctionCode ) && ( ucFunctionCode <= 127 ) ) { |
giryan | 0:274eb57e1df3 | 217 | ENTER_CRITICAL_SECTION( ); |
giryan | 0:274eb57e1df3 | 218 | if ( pxHandler != NULL ) { |
giryan | 0:274eb57e1df3 | 219 | for ( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ ) { |
giryan | 0:274eb57e1df3 | 220 | if ( ( xFuncHandlers[i].pxHandler == NULL ) || |
giryan | 0:274eb57e1df3 | 221 | ( xFuncHandlers[i].pxHandler == pxHandler ) ) { |
giryan | 0:274eb57e1df3 | 222 | xFuncHandlers[i].ucFunctionCode = ucFunctionCode; |
giryan | 0:274eb57e1df3 | 223 | xFuncHandlers[i].pxHandler = pxHandler; |
giryan | 0:274eb57e1df3 | 224 | break; |
giryan | 0:274eb57e1df3 | 225 | } |
giryan | 0:274eb57e1df3 | 226 | } |
giryan | 0:274eb57e1df3 | 227 | eStatus = ( i != MB_FUNC_HANDLERS_MAX ) ? MB_ENOERR : MB_ENORES; |
giryan | 0:274eb57e1df3 | 228 | } else { |
giryan | 0:274eb57e1df3 | 229 | for ( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ ) { |
giryan | 0:274eb57e1df3 | 230 | if ( xFuncHandlers[i].ucFunctionCode == ucFunctionCode ) { |
giryan | 0:274eb57e1df3 | 231 | xFuncHandlers[i].ucFunctionCode = 0; |
giryan | 0:274eb57e1df3 | 232 | xFuncHandlers[i].pxHandler = NULL; |
giryan | 0:274eb57e1df3 | 233 | break; |
giryan | 0:274eb57e1df3 | 234 | } |
giryan | 0:274eb57e1df3 | 235 | } |
giryan | 0:274eb57e1df3 | 236 | /* Remove can't fail. */ |
giryan | 0:274eb57e1df3 | 237 | eStatus = MB_ENOERR; |
giryan | 0:274eb57e1df3 | 238 | } |
giryan | 0:274eb57e1df3 | 239 | EXIT_CRITICAL_SECTION( ); |
giryan | 0:274eb57e1df3 | 240 | } else { |
giryan | 0:274eb57e1df3 | 241 | eStatus = MB_EINVAL; |
giryan | 0:274eb57e1df3 | 242 | } |
giryan | 0:274eb57e1df3 | 243 | return eStatus; |
giryan | 0:274eb57e1df3 | 244 | } |
giryan | 0:274eb57e1df3 | 245 | |
giryan | 0:274eb57e1df3 | 246 | |
giryan | 0:274eb57e1df3 | 247 | eMBErrorCode |
giryan | 0:274eb57e1df3 | 248 | eMBClose( void ) { |
giryan | 0:274eb57e1df3 | 249 | eMBErrorCode eStatus = MB_ENOERR; |
giryan | 0:274eb57e1df3 | 250 | |
giryan | 0:274eb57e1df3 | 251 | if ( eMBState == STATE_DISABLED ) { |
giryan | 0:274eb57e1df3 | 252 | if ( pvMBFrameCloseCur != NULL ) { |
giryan | 0:274eb57e1df3 | 253 | pvMBFrameCloseCur( ); |
giryan | 0:274eb57e1df3 | 254 | } |
giryan | 0:274eb57e1df3 | 255 | } else { |
giryan | 0:274eb57e1df3 | 256 | eStatus = MB_EILLSTATE; |
giryan | 0:274eb57e1df3 | 257 | } |
giryan | 0:274eb57e1df3 | 258 | return eStatus; |
giryan | 0:274eb57e1df3 | 259 | } |
giryan | 0:274eb57e1df3 | 260 | |
giryan | 0:274eb57e1df3 | 261 | eMBErrorCode |
giryan | 0:274eb57e1df3 | 262 | eMBEnable( void ) { |
giryan | 0:274eb57e1df3 | 263 | eMBErrorCode eStatus = MB_ENOERR; |
giryan | 0:274eb57e1df3 | 264 | |
giryan | 0:274eb57e1df3 | 265 | if ( eMBState == STATE_DISABLED ) { |
giryan | 0:274eb57e1df3 | 266 | /* Activate the protocol stack. */ |
giryan | 0:274eb57e1df3 | 267 | pvMBFrameStartCur( ); |
giryan | 0:274eb57e1df3 | 268 | eMBState = STATE_ENABLED; |
giryan | 0:274eb57e1df3 | 269 | } else { |
giryan | 0:274eb57e1df3 | 270 | eStatus = MB_EILLSTATE; |
giryan | 0:274eb57e1df3 | 271 | } |
giryan | 0:274eb57e1df3 | 272 | return eStatus; |
giryan | 0:274eb57e1df3 | 273 | } |
giryan | 0:274eb57e1df3 | 274 | |
giryan | 0:274eb57e1df3 | 275 | eMBErrorCode |
giryan | 0:274eb57e1df3 | 276 | eMBDisable( void ) { |
giryan | 0:274eb57e1df3 | 277 | eMBErrorCode eStatus; |
giryan | 0:274eb57e1df3 | 278 | |
giryan | 0:274eb57e1df3 | 279 | if ( eMBState == STATE_ENABLED ) { |
giryan | 0:274eb57e1df3 | 280 | pvMBFrameStopCur( ); |
giryan | 0:274eb57e1df3 | 281 | eMBState = STATE_DISABLED; |
giryan | 0:274eb57e1df3 | 282 | eStatus = MB_ENOERR; |
giryan | 0:274eb57e1df3 | 283 | } else if ( eMBState == STATE_DISABLED ) { |
giryan | 0:274eb57e1df3 | 284 | eStatus = MB_ENOERR; |
giryan | 0:274eb57e1df3 | 285 | } else { |
giryan | 0:274eb57e1df3 | 286 | eStatus = MB_EILLSTATE; |
giryan | 0:274eb57e1df3 | 287 | } |
giryan | 0:274eb57e1df3 | 288 | return eStatus; |
giryan | 0:274eb57e1df3 | 289 | } |
giryan | 0:274eb57e1df3 | 290 | |
giryan | 0:274eb57e1df3 | 291 | eMBErrorCode |
giryan | 0:274eb57e1df3 | 292 | eMBPoll( void ) { |
giryan | 0:274eb57e1df3 | 293 | static UCHAR *ucMBFrame; |
giryan | 0:274eb57e1df3 | 294 | static UCHAR ucRcvAddress; |
giryan | 0:274eb57e1df3 | 295 | static UCHAR ucFunctionCode; |
giryan | 0:274eb57e1df3 | 296 | static USHORT usLength; |
giryan | 0:274eb57e1df3 | 297 | static eMBException eException; |
giryan | 0:274eb57e1df3 | 298 | |
giryan | 0:274eb57e1df3 | 299 | int i; |
giryan | 0:274eb57e1df3 | 300 | eMBErrorCode eStatus = MB_ENOERR; |
giryan | 0:274eb57e1df3 | 301 | eMBEventType eEvent; |
giryan | 0:274eb57e1df3 | 302 | |
giryan | 0:274eb57e1df3 | 303 | /* Check if the protocol stack is ready. */ |
giryan | 0:274eb57e1df3 | 304 | if ( eMBState != STATE_ENABLED ) { |
giryan | 0:274eb57e1df3 | 305 | return MB_EILLSTATE; |
giryan | 0:274eb57e1df3 | 306 | } |
giryan | 0:274eb57e1df3 | 307 | |
giryan | 0:274eb57e1df3 | 308 | /* Check if there is a event available. If not return control to caller. |
giryan | 0:274eb57e1df3 | 309 | * Otherwise we will handle the event. */ |
giryan | 0:274eb57e1df3 | 310 | if ( xMBPortEventGet( &eEvent ) == TRUE ) { |
giryan | 0:274eb57e1df3 | 311 | switch ( eEvent ) { |
giryan | 0:274eb57e1df3 | 312 | case EV_READY: |
giryan | 0:274eb57e1df3 | 313 | break; |
giryan | 0:274eb57e1df3 | 314 | |
giryan | 0:274eb57e1df3 | 315 | case EV_FRAME_RECEIVED: |
giryan | 0:274eb57e1df3 | 316 | eStatus = peMBFrameReceiveCur( &ucRcvAddress, &ucMBFrame, &usLength ); |
wclin | 3:419ee4c5e10f | 317 | //printf("[EV_FRAME_RECEIVED] usLength=%d \r\n", usLength ); |
giryan | 0:274eb57e1df3 | 318 | if ( eStatus == MB_ENOERR ) { |
wclin | 3:419ee4c5e10f | 319 | #if 0 |
wclin | 3:419ee4c5e10f | 320 | if ( ucMBFrame ) |
wclin | 3:419ee4c5e10f | 321 | { |
wclin | 3:419ee4c5e10f | 322 | printf( "\r\n" ); |
wclin | 3:419ee4c5e10f | 323 | printf( "-->" ); |
wclin | 3:419ee4c5e10f | 324 | for ( int i=0; i< usLength; i++ ) |
wclin | 3:419ee4c5e10f | 325 | printf("%02x ", ucMBFrame[i]); |
wclin | 3:419ee4c5e10f | 326 | printf( "\r\n" ); |
wclin | 3:419ee4c5e10f | 327 | } |
wclin | 3:419ee4c5e10f | 328 | #endif |
giryan | 0:274eb57e1df3 | 329 | /* Check if the frame is for us. If not ignore the frame. */ |
giryan | 0:274eb57e1df3 | 330 | if ( ( ucRcvAddress == ucMBAddress ) || ( ucRcvAddress == MB_ADDRESS_BROADCAST ) ) { |
giryan | 0:274eb57e1df3 | 331 | ( void )xMBPortEventPost( EV_EXECUTE ); |
wclin | 3:419ee4c5e10f | 332 | } //else |
wclin | 3:419ee4c5e10f | 333 | //printf("Drop\r\n"); |
wclin | 3:419ee4c5e10f | 334 | } //else printf("Error\r\n"); |
giryan | 0:274eb57e1df3 | 335 | break; |
giryan | 0:274eb57e1df3 | 336 | |
giryan | 0:274eb57e1df3 | 337 | case EV_EXECUTE: |
giryan | 0:274eb57e1df3 | 338 | ucFunctionCode = ucMBFrame[MB_PDU_FUNC_OFF]; |
giryan | 0:274eb57e1df3 | 339 | eException = MB_EX_ILLEGAL_FUNCTION; |
giryan | 0:274eb57e1df3 | 340 | |
giryan | 0:274eb57e1df3 | 341 | |
giryan | 0:274eb57e1df3 | 342 | for ( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ ) { |
giryan | 0:274eb57e1df3 | 343 | /* No more function handlers registered. Abort. */ |
giryan | 0:274eb57e1df3 | 344 | if ( xFuncHandlers[i].ucFunctionCode == 0 ) { |
giryan | 0:274eb57e1df3 | 345 | break; |
giryan | 0:274eb57e1df3 | 346 | } else if ( xFuncHandlers[i].ucFunctionCode == ucFunctionCode ) { |
giryan | 0:274eb57e1df3 | 347 | eException = xFuncHandlers[i].pxHandler( ucMBFrame, &usLength ); |
giryan | 0:274eb57e1df3 | 348 | break; |
giryan | 0:274eb57e1df3 | 349 | } |
giryan | 0:274eb57e1df3 | 350 | } |
giryan | 0:274eb57e1df3 | 351 | |
giryan | 0:274eb57e1df3 | 352 | /* If the request was not sent to the broadcast address we |
giryan | 0:274eb57e1df3 | 353 | * return a reply. */ |
giryan | 0:274eb57e1df3 | 354 | if ( ucRcvAddress != MB_ADDRESS_BROADCAST ) { |
giryan | 0:274eb57e1df3 | 355 | if ( eException != MB_EX_NONE ) { |
giryan | 0:274eb57e1df3 | 356 | /* An exception occured. Build an error frame. */ |
giryan | 0:274eb57e1df3 | 357 | usLength = 0; |
giryan | 0:274eb57e1df3 | 358 | ucMBFrame[usLength++] = ( UCHAR )( ucFunctionCode | MB_FUNC_ERROR ); |
giryan | 0:274eb57e1df3 | 359 | ucMBFrame[usLength++] = eException; |
giryan | 0:274eb57e1df3 | 360 | } |
giryan | 0:274eb57e1df3 | 361 | eStatus = peMBFrameSendCur( ucMBAddress, ucMBFrame, usLength ); |
wclin | 3:419ee4c5e10f | 362 | #if 0 |
wclin | 3:419ee4c5e10f | 363 | if ( ucMBFrame ) |
wclin | 3:419ee4c5e10f | 364 | { |
wclin | 3:419ee4c5e10f | 365 | printf( "\r\n" ); |
wclin | 3:419ee4c5e10f | 366 | printf( "<--" ); |
wclin | 3:419ee4c5e10f | 367 | for ( int i=0; i< usLength; i++ ) |
wclin | 3:419ee4c5e10f | 368 | printf("%02x ", ucMBFrame[i]); |
wclin | 3:419ee4c5e10f | 369 | printf( "\r\n" ); |
wclin | 3:419ee4c5e10f | 370 | #endif |
giryan | 0:274eb57e1df3 | 371 | } |
giryan | 0:274eb57e1df3 | 372 | break; |
giryan | 0:274eb57e1df3 | 373 | |
giryan | 0:274eb57e1df3 | 374 | case EV_FRAME_SENT: |
giryan | 0:274eb57e1df3 | 375 | break; |
giryan | 0:274eb57e1df3 | 376 | } |
giryan | 0:274eb57e1df3 | 377 | } |
giryan | 0:274eb57e1df3 | 378 | return MB_ENOERR; |
giryan | 0:274eb57e1df3 | 379 | } |