Yuji Hosogaya / Mbed 2 deprecated ModbusTCP_Modified

Modified version of ModbusTCP

Dependencies:   EthernetNetIf mbed

ModBus/mbfuncholding.cpp@3:d7d7c67f21fa, 2012-03-15 (annotated)

Committer:
paleskyjp
Date:
Thu Mar 15 15:28:14 2012 +0000
Revision:
3:d7d7c67f21fa
Parent:
0:62be54b8975d 
eMBRegCoilsCB was corrected.

(Implementation of writing single coil was wrong.)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
paleskyjp 0:62be54b8975d 1 /*
paleskyjp 0:62be54b8975d 2 * FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
paleskyjp 0:62be54b8975d 3 * Copyright (c) 2006 Christian Walter <wolti@sil.at>
paleskyjp 0:62be54b8975d 4 * All rights reserved.
paleskyjp 0:62be54b8975d 5 *
paleskyjp 0:62be54b8975d 6 * Redistribution and use in source and binary forms, with or without
paleskyjp 0:62be54b8975d 7 * modification, are permitted provided that the following conditions
paleskyjp 0:62be54b8975d 8 * are met:
paleskyjp 0:62be54b8975d 9 * 1. Redistributions of source code must retain the above copyright
paleskyjp 0:62be54b8975d 10 * notice, this list of conditions and the following disclaimer.
paleskyjp 0:62be54b8975d 11 * 2. Redistributions in binary form must reproduce the above copyright
paleskyjp 0:62be54b8975d 12 * notice, this list of conditions and the following disclaimer in the
paleskyjp 0:62be54b8975d 13 * documentation and/or other materials provided with the distribution.
paleskyjp 0:62be54b8975d 14 * 3. The name of the author may not be used to endorse or promote products
paleskyjp 0:62be54b8975d 15 * derived from this software without specific prior written permission.
paleskyjp 0:62be54b8975d 16 *
paleskyjp 0:62be54b8975d 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
paleskyjp 0:62be54b8975d 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
paleskyjp 0:62be54b8975d 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
paleskyjp 0:62be54b8975d 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
paleskyjp 0:62be54b8975d 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
paleskyjp 0:62be54b8975d 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
paleskyjp 0:62be54b8975d 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
paleskyjp 0:62be54b8975d 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
paleskyjp 0:62be54b8975d 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
paleskyjp 0:62be54b8975d 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
paleskyjp 0:62be54b8975d 27 *
paleskyjp 0:62be54b8975d 28 * File: $Id: mbfuncholding.c,v 1.12 2007/02/18 23:48:22 wolti Exp $
paleskyjp 0:62be54b8975d 29 */
paleskyjp 0:62be54b8975d 30
paleskyjp 0:62be54b8975d 31 /* ----------------------- System includes ----------------------------------*/
paleskyjp 0:62be54b8975d 32 #include "stdlib.h"
paleskyjp 0:62be54b8975d 33 #include "string.h"
paleskyjp 0:62be54b8975d 34
paleskyjp 0:62be54b8975d 35 /* ----------------------- Platform includes --------------------------------*/
paleskyjp 0:62be54b8975d 36 #include "port.h"
paleskyjp 0:62be54b8975d 37
paleskyjp 0:62be54b8975d 38 /* ----------------------- Modbus includes ----------------------------------*/
paleskyjp 0:62be54b8975d 39 #include "mb.h"
paleskyjp 0:62be54b8975d 40 #include "mbframe.h"
paleskyjp 0:62be54b8975d 41 #include "mbproto.h"
paleskyjp 0:62be54b8975d 42 #include "mbconfig.h"
paleskyjp 0:62be54b8975d 43
paleskyjp 0:62be54b8975d 44 /* ----------------------- Defines ------------------------------------------*/
paleskyjp 0:62be54b8975d 45 #define MB_PDU_FUNC_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0)
paleskyjp 0:62be54b8975d 46 #define MB_PDU_FUNC_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
paleskyjp 0:62be54b8975d 47 #define MB_PDU_FUNC_READ_SIZE ( 4 )
paleskyjp 0:62be54b8975d 48 #define MB_PDU_FUNC_READ_REGCNT_MAX ( 0x007D )
paleskyjp 0:62be54b8975d 49
paleskyjp 0:62be54b8975d 50 #define MB_PDU_FUNC_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 0)
paleskyjp 0:62be54b8975d 51 #define MB_PDU_FUNC_WRITE_VALUE_OFF ( MB_PDU_DATA_OFF + 2 )
paleskyjp 0:62be54b8975d 52 #define MB_PDU_FUNC_WRITE_SIZE ( 4 )
paleskyjp 0:62be54b8975d 53
paleskyjp 0:62be54b8975d 54 #define MB_PDU_FUNC_WRITE_MUL_ADDR_OFF ( MB_PDU_DATA_OFF + 0 )
paleskyjp 0:62be54b8975d 55 #define MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
paleskyjp 0:62be54b8975d 56 #define MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF ( MB_PDU_DATA_OFF + 4 )
paleskyjp 0:62be54b8975d 57 #define MB_PDU_FUNC_WRITE_MUL_VALUES_OFF ( MB_PDU_DATA_OFF + 5 )
paleskyjp 0:62be54b8975d 58 #define MB_PDU_FUNC_WRITE_MUL_SIZE_MIN ( 5 )
paleskyjp 0:62be54b8975d 59 #define MB_PDU_FUNC_WRITE_MUL_REGCNT_MAX ( 0x0078 )
paleskyjp 0:62be54b8975d 60
paleskyjp 0:62be54b8975d 61 #define MB_PDU_FUNC_READWRITE_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0 )
paleskyjp 0:62be54b8975d 62 #define MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
paleskyjp 0:62be54b8975d 63 #define MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 4 )
paleskyjp 0:62be54b8975d 64 #define MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF ( MB_PDU_DATA_OFF + 6 )
paleskyjp 0:62be54b8975d 65 #define MB_PDU_FUNC_READWRITE_BYTECNT_OFF ( MB_PDU_DATA_OFF + 8 )
paleskyjp 0:62be54b8975d 66 #define MB_PDU_FUNC_READWRITE_WRITE_VALUES_OFF ( MB_PDU_DATA_OFF + 9 )
paleskyjp 0:62be54b8975d 67 #define MB_PDU_FUNC_READWRITE_SIZE_MIN ( 9 )
paleskyjp 0:62be54b8975d 68
paleskyjp 0:62be54b8975d 69 /* ----------------------- Static functions ---------------------------------*/
paleskyjp 0:62be54b8975d 70 eMBException prveMBError2Exception( eMBErrorCode eErrorCode );
paleskyjp 0:62be54b8975d 71
paleskyjp 0:62be54b8975d 72 /* ----------------------- Start implementation -----------------------------*/
paleskyjp 0:62be54b8975d 73
paleskyjp 0:62be54b8975d 74 #if MB_FUNC_WRITE_HOLDING_ENABLED > 0
paleskyjp 0:62be54b8975d 75
paleskyjp 0:62be54b8975d 76 eMBException
paleskyjp 0:62be54b8975d 77 eMBFuncWriteHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
paleskyjp 0:62be54b8975d 78 {
paleskyjp 0:62be54b8975d 79 USHORT usRegAddress;
paleskyjp 0:62be54b8975d 80 eMBException eStatus = MB_EX_NONE;
paleskyjp 0:62be54b8975d 81 eMBErrorCode eRegStatus;
paleskyjp 0:62be54b8975d 82
paleskyjp 0:62be54b8975d 83 if( *usLen == ( MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN ) )
paleskyjp 0:62be54b8975d 84 {
paleskyjp 0:62be54b8975d 85 usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF] << 8 );
paleskyjp 0:62be54b8975d 86 usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF + 1] );
paleskyjp 0:62be54b8975d 87 usRegAddress++;
paleskyjp 0:62be54b8975d 88
paleskyjp 0:62be54b8975d 89 /* Make callback to update the value. */
paleskyjp 0:62be54b8975d 90 eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF],
paleskyjp 0:62be54b8975d 91 usRegAddress, 1, MB_REG_WRITE );
paleskyjp 0:62be54b8975d 92
paleskyjp 0:62be54b8975d 93 /* If an error occured convert it into a Modbus exception. */
paleskyjp 0:62be54b8975d 94 if( eRegStatus != MB_ENOERR )
paleskyjp 0:62be54b8975d 95 {
paleskyjp 0:62be54b8975d 96 eStatus = prveMBError2Exception( eRegStatus );
paleskyjp 0:62be54b8975d 97 }
paleskyjp 0:62be54b8975d 98 }
paleskyjp 0:62be54b8975d 99 else
paleskyjp 0:62be54b8975d 100 {
paleskyjp 0:62be54b8975d 101 /* Can't be a valid request because the length is incorrect. */
paleskyjp 0:62be54b8975d 102 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
paleskyjp 0:62be54b8975d 103 }
paleskyjp 0:62be54b8975d 104 return eStatus;
paleskyjp 0:62be54b8975d 105 }
paleskyjp 0:62be54b8975d 106 #endif
paleskyjp 0:62be54b8975d 107
paleskyjp 0:62be54b8975d 108 #if MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED > 0
paleskyjp 0:62be54b8975d 109 eMBException
paleskyjp 0:62be54b8975d 110 eMBFuncWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
paleskyjp 0:62be54b8975d 111 {
paleskyjp 0:62be54b8975d 112 USHORT usRegAddress;
paleskyjp 0:62be54b8975d 113 USHORT usRegCount;
paleskyjp 0:62be54b8975d 114 UCHAR ucRegByteCount;
paleskyjp 0:62be54b8975d 115
paleskyjp 0:62be54b8975d 116 eMBException eStatus = MB_EX_NONE;
paleskyjp 0:62be54b8975d 117 eMBErrorCode eRegStatus;
paleskyjp 0:62be54b8975d 118
paleskyjp 0:62be54b8975d 119 if( *usLen >= ( MB_PDU_FUNC_WRITE_MUL_SIZE_MIN + MB_PDU_SIZE_MIN ) )
paleskyjp 0:62be54b8975d 120 {
paleskyjp 0:62be54b8975d 121 usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF] << 8 );
paleskyjp 0:62be54b8975d 122 usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF + 1] );
paleskyjp 0:62be54b8975d 123 usRegAddress++;
paleskyjp 0:62be54b8975d 124
paleskyjp 0:62be54b8975d 125 usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF] << 8 );
paleskyjp 0:62be54b8975d 126 usRegCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF + 1] );
paleskyjp 0:62be54b8975d 127
paleskyjp 0:62be54b8975d 128 ucRegByteCount = pucFrame[MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF];
paleskyjp 0:62be54b8975d 129
paleskyjp 0:62be54b8975d 130 if( ( usRegCount >= 1 ) &&
paleskyjp 0:62be54b8975d 131 ( usRegCount <= MB_PDU_FUNC_WRITE_MUL_REGCNT_MAX ) &&
paleskyjp 0:62be54b8975d 132 ( ucRegByteCount == ( UCHAR ) ( 2 * usRegCount ) ) )
paleskyjp 0:62be54b8975d 133 {
paleskyjp 0:62be54b8975d 134 /* Make callback to update the register values. */
paleskyjp 0:62be54b8975d 135 eRegStatus =
paleskyjp 0:62be54b8975d 136 eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_WRITE_MUL_VALUES_OFF],
paleskyjp 0:62be54b8975d 137 usRegAddress, usRegCount, MB_REG_WRITE );
paleskyjp 0:62be54b8975d 138
paleskyjp 0:62be54b8975d 139 /* If an error occured convert it into a Modbus exception. */
paleskyjp 0:62be54b8975d 140 if( eRegStatus != MB_ENOERR )
paleskyjp 0:62be54b8975d 141 {
paleskyjp 0:62be54b8975d 142 eStatus = prveMBError2Exception( eRegStatus );
paleskyjp 0:62be54b8975d 143 }
paleskyjp 0:62be54b8975d 144 else
paleskyjp 0:62be54b8975d 145 {
paleskyjp 0:62be54b8975d 146 /* The response contains the function code, the starting
paleskyjp 0:62be54b8975d 147 * address and the quantity of registers. We reuse the
paleskyjp 0:62be54b8975d 148 * old values in the buffer because they are still valid.
paleskyjp 0:62be54b8975d 149 */
paleskyjp 0:62be54b8975d 150 *usLen = MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF;
paleskyjp 0:62be54b8975d 151 }
paleskyjp 0:62be54b8975d 152 }
paleskyjp 0:62be54b8975d 153 else
paleskyjp 0:62be54b8975d 154 {
paleskyjp 0:62be54b8975d 155 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
paleskyjp 0:62be54b8975d 156 }
paleskyjp 0:62be54b8975d 157 }
paleskyjp 0:62be54b8975d 158 else
paleskyjp 0:62be54b8975d 159 {
paleskyjp 0:62be54b8975d 160 /* Can't be a valid request because the length is incorrect. */
paleskyjp 0:62be54b8975d 161 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
paleskyjp 0:62be54b8975d 162 }
paleskyjp 0:62be54b8975d 163 return eStatus;
paleskyjp 0:62be54b8975d 164 }
paleskyjp 0:62be54b8975d 165 #endif
paleskyjp 0:62be54b8975d 166
paleskyjp 0:62be54b8975d 167 #if MB_FUNC_READ_HOLDING_ENABLED > 0
paleskyjp 0:62be54b8975d 168
paleskyjp 0:62be54b8975d 169 eMBException
paleskyjp 0:62be54b8975d 170 eMBFuncReadHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
paleskyjp 0:62be54b8975d 171 {
paleskyjp 0:62be54b8975d 172 USHORT usRegAddress;
paleskyjp 0:62be54b8975d 173 USHORT usRegCount;
paleskyjp 0:62be54b8975d 174 UCHAR *pucFrameCur;
paleskyjp 0:62be54b8975d 175
paleskyjp 0:62be54b8975d 176 eMBException eStatus = MB_EX_NONE;
paleskyjp 0:62be54b8975d 177 eMBErrorCode eRegStatus;
paleskyjp 0:62be54b8975d 178
paleskyjp 0:62be54b8975d 179 if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) )
paleskyjp 0:62be54b8975d 180 {
paleskyjp 0:62be54b8975d 181 usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 );
paleskyjp 0:62be54b8975d 182 usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] );
paleskyjp 0:62be54b8975d 183 usRegAddress++;
paleskyjp 0:62be54b8975d 184
paleskyjp 0:62be54b8975d 185 usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF] << 8 );
paleskyjp 0:62be54b8975d 186 usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF + 1] );
paleskyjp 0:62be54b8975d 187
paleskyjp 0:62be54b8975d 188 /* Check if the number of registers to read is valid. If not
paleskyjp 0:62be54b8975d 189 * return Modbus illegal data value exception.
paleskyjp 0:62be54b8975d 190 */
paleskyjp 0:62be54b8975d 191 if( ( usRegCount >= 1 ) && ( usRegCount <= MB_PDU_FUNC_READ_REGCNT_MAX ) )
paleskyjp 0:62be54b8975d 192 {
paleskyjp 0:62be54b8975d 193 /* Set the current PDU data pointer to the beginning. */
paleskyjp 0:62be54b8975d 194 pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF];
paleskyjp 0:62be54b8975d 195 *usLen = MB_PDU_FUNC_OFF;
paleskyjp 0:62be54b8975d 196
paleskyjp 0:62be54b8975d 197 /* First byte contains the function code. */
paleskyjp 0:62be54b8975d 198 *pucFrameCur++ = MB_FUNC_READ_HOLDING_REGISTER;
paleskyjp 0:62be54b8975d 199 *usLen += 1;
paleskyjp 0:62be54b8975d 200
paleskyjp 0:62be54b8975d 201 /* Second byte in the response contain the number of bytes. */
paleskyjp 0:62be54b8975d 202 *pucFrameCur++ = ( UCHAR ) ( usRegCount * 2 );
paleskyjp 0:62be54b8975d 203 *usLen += 1;
paleskyjp 0:62be54b8975d 204
paleskyjp 0:62be54b8975d 205 /* Make callback to fill the buffer. */
paleskyjp 0:62be54b8975d 206 eRegStatus = eMBRegHoldingCB( pucFrameCur, usRegAddress, usRegCount, MB_REG_READ );
paleskyjp 0:62be54b8975d 207 /* If an error occured convert it into a Modbus exception. */
paleskyjp 0:62be54b8975d 208 if( eRegStatus != MB_ENOERR )
paleskyjp 0:62be54b8975d 209 {
paleskyjp 0:62be54b8975d 210 eStatus = prveMBError2Exception( eRegStatus );
paleskyjp 0:62be54b8975d 211 }
paleskyjp 0:62be54b8975d 212 else
paleskyjp 0:62be54b8975d 213 {
paleskyjp 0:62be54b8975d 214 *usLen += usRegCount * 2;
paleskyjp 0:62be54b8975d 215 }
paleskyjp 0:62be54b8975d 216 }
paleskyjp 0:62be54b8975d 217 else
paleskyjp 0:62be54b8975d 218 {
paleskyjp 0:62be54b8975d 219 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
paleskyjp 0:62be54b8975d 220 }
paleskyjp 0:62be54b8975d 221 }
paleskyjp 0:62be54b8975d 222 else
paleskyjp 0:62be54b8975d 223 {
paleskyjp 0:62be54b8975d 224 /* Can't be a valid request because the length is incorrect. */
paleskyjp 0:62be54b8975d 225 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
paleskyjp 0:62be54b8975d 226 }
paleskyjp 0:62be54b8975d 227 return eStatus;
paleskyjp 0:62be54b8975d 228 }
paleskyjp 0:62be54b8975d 229
paleskyjp 0:62be54b8975d 230 #endif
paleskyjp 0:62be54b8975d 231
paleskyjp 0:62be54b8975d 232 #if MB_FUNC_READWRITE_HOLDING_ENABLED > 0
paleskyjp 0:62be54b8975d 233
paleskyjp 0:62be54b8975d 234 eMBException
paleskyjp 0:62be54b8975d 235 eMBFuncReadWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
paleskyjp 0:62be54b8975d 236 {
paleskyjp 0:62be54b8975d 237 USHORT usRegReadAddress;
paleskyjp 0:62be54b8975d 238 USHORT usRegReadCount;
paleskyjp 0:62be54b8975d 239 USHORT usRegWriteAddress;
paleskyjp 0:62be54b8975d 240 USHORT usRegWriteCount;
paleskyjp 0:62be54b8975d 241 UCHAR ucRegWriteByteCount;
paleskyjp 0:62be54b8975d 242 UCHAR *pucFrameCur;
paleskyjp 0:62be54b8975d 243
paleskyjp 0:62be54b8975d 244 eMBException eStatus = MB_EX_NONE;
paleskyjp 0:62be54b8975d 245 eMBErrorCode eRegStatus;
paleskyjp 0:62be54b8975d 246
paleskyjp 0:62be54b8975d 247 if( *usLen >= ( MB_PDU_FUNC_READWRITE_SIZE_MIN + MB_PDU_SIZE_MIN ) )
paleskyjp 0:62be54b8975d 248 {
paleskyjp 0:62be54b8975d 249 usRegReadAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF] << 8U );
paleskyjp 0:62be54b8975d 250 usRegReadAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF + 1] );
paleskyjp 0:62be54b8975d 251 usRegReadAddress++;
paleskyjp 0:62be54b8975d 252
paleskyjp 0:62be54b8975d 253 usRegReadCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF] << 8U );
paleskyjp 0:62be54b8975d 254 usRegReadCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF + 1] );
paleskyjp 0:62be54b8975d 255
paleskyjp 0:62be54b8975d 256 usRegWriteAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF] << 8U );
paleskyjp 0:62be54b8975d 257 usRegWriteAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF + 1] );
paleskyjp 0:62be54b8975d 258 usRegWriteAddress++;
paleskyjp 0:62be54b8975d 259
paleskyjp 0:62be54b8975d 260 usRegWriteCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF] << 8U );
paleskyjp 0:62be54b8975d 261 usRegWriteCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF + 1] );
paleskyjp 0:62be54b8975d 262
paleskyjp 0:62be54b8975d 263 ucRegWriteByteCount = pucFrame[MB_PDU_FUNC_READWRITE_BYTECNT_OFF];
paleskyjp 0:62be54b8975d 264
paleskyjp 0:62be54b8975d 265 if( ( usRegReadCount >= 1 ) && ( usRegReadCount <= 0x7D ) &&
paleskyjp 0:62be54b8975d 266 ( usRegWriteCount >= 1 ) && ( usRegWriteCount <= 0x79 ) &&
paleskyjp 0:62be54b8975d 267 ( ( 2 * usRegWriteCount ) == ucRegWriteByteCount ) )
paleskyjp 0:62be54b8975d 268 {
paleskyjp 0:62be54b8975d 269 /* Make callback to update the register values. */
paleskyjp 0:62be54b8975d 270 eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_READWRITE_WRITE_VALUES_OFF],
paleskyjp 0:62be54b8975d 271 usRegWriteAddress, usRegWriteCount, MB_REG_WRITE );
paleskyjp 0:62be54b8975d 272
paleskyjp 0:62be54b8975d 273 if( eRegStatus == MB_ENOERR )
paleskyjp 0:62be54b8975d 274 {
paleskyjp 0:62be54b8975d 275 /* Set the current PDU data pointer to the beginning. */
paleskyjp 0:62be54b8975d 276 pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF];
paleskyjp 0:62be54b8975d 277 *usLen = MB_PDU_FUNC_OFF;
paleskyjp 0:62be54b8975d 278
paleskyjp 0:62be54b8975d 279 /* First byte contains the function code. */
paleskyjp 0:62be54b8975d 280 *pucFrameCur++ = MB_FUNC_READWRITE_MULTIPLE_REGISTERS;
paleskyjp 0:62be54b8975d 281 *usLen += 1;
paleskyjp 0:62be54b8975d 282
paleskyjp 0:62be54b8975d 283 /* Second byte in the response contain the number of bytes. */
paleskyjp 0:62be54b8975d 284 *pucFrameCur++ = ( UCHAR ) ( usRegReadCount * 2 );
paleskyjp 0:62be54b8975d 285 *usLen += 1;
paleskyjp 0:62be54b8975d 286
paleskyjp 0:62be54b8975d 287 /* Make the read callback. */
paleskyjp 0:62be54b8975d 288 eRegStatus =
paleskyjp 0:62be54b8975d 289 eMBRegHoldingCB( pucFrameCur, usRegReadAddress, usRegReadCount, MB_REG_READ );
paleskyjp 0:62be54b8975d 290 if( eRegStatus == MB_ENOERR )
paleskyjp 0:62be54b8975d 291 {
paleskyjp 0:62be54b8975d 292 *usLen += 2 * usRegReadCount;
paleskyjp 0:62be54b8975d 293 }
paleskyjp 0:62be54b8975d 294 }
paleskyjp 0:62be54b8975d 295 if( eRegStatus != MB_ENOERR )
paleskyjp 0:62be54b8975d 296 {
paleskyjp 0:62be54b8975d 297 eStatus = prveMBError2Exception( eRegStatus );
paleskyjp 0:62be54b8975d 298 }
paleskyjp 0:62be54b8975d 299 }
paleskyjp 0:62be54b8975d 300 else
paleskyjp 0:62be54b8975d 301 {
paleskyjp 0:62be54b8975d 302 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
paleskyjp 0:62be54b8975d 303 }
paleskyjp 0:62be54b8975d 304 }
paleskyjp 0:62be54b8975d 305 return eStatus;
paleskyjp 0:62be54b8975d 306 }
paleskyjp 0:62be54b8975d 307
paleskyjp 0:62be54b8975d 308 #endif