hsu han-lin / Modbus_For_F446RE

1.original from Cam Marshall 2.use for F446RE Test 3.use the interrupt method of uart 4.not change to RTOS yet

Dependents:   RoboticArm Modbus_Gripper_Test

functions/mbfuncholding.cpp@0:aefcdfe9ca2f, 2017-03-31 (annotated)

Committer:
stanley1228
Date:
Fri Mar 31 01:47:35 2017 +0000
Revision:
0:aefcdfe9ca2f
1.change the file in "port" folder to F446RE use

Who changed what in which revision?

UserRevisionLine numberNew contents of line
stanley1228 0:aefcdfe9ca2f 1 /*
stanley1228 0:aefcdfe9ca2f 2 * FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
stanley1228 0:aefcdfe9ca2f 3 * Copyright (c) 2006 Christian Walter <wolti@sil.at>
stanley1228 0:aefcdfe9ca2f 4 * All rights reserved.
stanley1228 0:aefcdfe9ca2f 5 *
stanley1228 0:aefcdfe9ca2f 6 * Redistribution and use in source and binary forms, with or without
stanley1228 0:aefcdfe9ca2f 7 * modification, are permitted provided that the following conditions
stanley1228 0:aefcdfe9ca2f 8 * are met:
stanley1228 0:aefcdfe9ca2f 9 * 1. Redistributions of source code must retain the above copyright
stanley1228 0:aefcdfe9ca2f 10 * notice, this list of conditions and the following disclaimer.
stanley1228 0:aefcdfe9ca2f 11 * 2. Redistributions in binary form must reproduce the above copyright
stanley1228 0:aefcdfe9ca2f 12 * notice, this list of conditions and the following disclaimer in the
stanley1228 0:aefcdfe9ca2f 13 * documentation and/or other materials provided with the distribution.
stanley1228 0:aefcdfe9ca2f 14 * 3. The name of the author may not be used to endorse or promote products
stanley1228 0:aefcdfe9ca2f 15 * derived from this software without specific prior written permission.
stanley1228 0:aefcdfe9ca2f 16 *
stanley1228 0:aefcdfe9ca2f 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
stanley1228 0:aefcdfe9ca2f 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
stanley1228 0:aefcdfe9ca2f 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
stanley1228 0:aefcdfe9ca2f 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
stanley1228 0:aefcdfe9ca2f 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
stanley1228 0:aefcdfe9ca2f 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
stanley1228 0:aefcdfe9ca2f 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
stanley1228 0:aefcdfe9ca2f 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
stanley1228 0:aefcdfe9ca2f 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
stanley1228 0:aefcdfe9ca2f 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
stanley1228 0:aefcdfe9ca2f 27 *
stanley1228 0:aefcdfe9ca2f 28 * File: $Id: mbfuncholding.c,v 1.12 2007/02/18 23:48:22 wolti Exp $
stanley1228 0:aefcdfe9ca2f 29 */
stanley1228 0:aefcdfe9ca2f 30
stanley1228 0:aefcdfe9ca2f 31 /* ----------------------- System includes ----------------------------------*/
stanley1228 0:aefcdfe9ca2f 32 #include "stdlib.h"
stanley1228 0:aefcdfe9ca2f 33 #include "string.h"
stanley1228 0:aefcdfe9ca2f 34
stanley1228 0:aefcdfe9ca2f 35 /* ----------------------- Platform includes --------------------------------*/
stanley1228 0:aefcdfe9ca2f 36 #include "port.h"
stanley1228 0:aefcdfe9ca2f 37
stanley1228 0:aefcdfe9ca2f 38 /* ----------------------- Modbus includes ----------------------------------*/
stanley1228 0:aefcdfe9ca2f 39 #include "mb.h"
stanley1228 0:aefcdfe9ca2f 40 #include "mbframe.h"
stanley1228 0:aefcdfe9ca2f 41 #include "mbproto.h"
stanley1228 0:aefcdfe9ca2f 42 #include "mbconfig.h"
stanley1228 0:aefcdfe9ca2f 43
stanley1228 0:aefcdfe9ca2f 44 /* ----------------------- Defines ------------------------------------------*/
stanley1228 0:aefcdfe9ca2f 45 #define MB_PDU_FUNC_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0)
stanley1228 0:aefcdfe9ca2f 46 #define MB_PDU_FUNC_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
stanley1228 0:aefcdfe9ca2f 47 #define MB_PDU_FUNC_READ_SIZE ( 4 )
stanley1228 0:aefcdfe9ca2f 48 #define MB_PDU_FUNC_READ_REGCNT_MAX ( 0x007D )
stanley1228 0:aefcdfe9ca2f 49
stanley1228 0:aefcdfe9ca2f 50 #define MB_PDU_FUNC_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 0)
stanley1228 0:aefcdfe9ca2f 51 #define MB_PDU_FUNC_WRITE_VALUE_OFF ( MB_PDU_DATA_OFF + 2 )
stanley1228 0:aefcdfe9ca2f 52 #define MB_PDU_FUNC_WRITE_SIZE ( 4 )
stanley1228 0:aefcdfe9ca2f 53
stanley1228 0:aefcdfe9ca2f 54 #define MB_PDU_FUNC_WRITE_MUL_ADDR_OFF ( MB_PDU_DATA_OFF + 0 )
stanley1228 0:aefcdfe9ca2f 55 #define MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
stanley1228 0:aefcdfe9ca2f 56 #define MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF ( MB_PDU_DATA_OFF + 4 )
stanley1228 0:aefcdfe9ca2f 57 #define MB_PDU_FUNC_WRITE_MUL_VALUES_OFF ( MB_PDU_DATA_OFF + 5 )
stanley1228 0:aefcdfe9ca2f 58 #define MB_PDU_FUNC_WRITE_MUL_SIZE_MIN ( 5 )
stanley1228 0:aefcdfe9ca2f 59 #define MB_PDU_FUNC_WRITE_MUL_REGCNT_MAX ( 0x0078 )
stanley1228 0:aefcdfe9ca2f 60
stanley1228 0:aefcdfe9ca2f 61 #define MB_PDU_FUNC_READWRITE_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0 )
stanley1228 0:aefcdfe9ca2f 62 #define MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
stanley1228 0:aefcdfe9ca2f 63 #define MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 4 )
stanley1228 0:aefcdfe9ca2f 64 #define MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF ( MB_PDU_DATA_OFF + 6 )
stanley1228 0:aefcdfe9ca2f 65 #define MB_PDU_FUNC_READWRITE_BYTECNT_OFF ( MB_PDU_DATA_OFF + 8 )
stanley1228 0:aefcdfe9ca2f 66 #define MB_PDU_FUNC_READWRITE_WRITE_VALUES_OFF ( MB_PDU_DATA_OFF + 9 )
stanley1228 0:aefcdfe9ca2f 67 #define MB_PDU_FUNC_READWRITE_SIZE_MIN ( 9 )
stanley1228 0:aefcdfe9ca2f 68
stanley1228 0:aefcdfe9ca2f 69 /* ----------------------- Static functions ---------------------------------*/
stanley1228 0:aefcdfe9ca2f 70 eMBException prveMBError2Exception( eMBErrorCode eErrorCode );
stanley1228 0:aefcdfe9ca2f 71
stanley1228 0:aefcdfe9ca2f 72 /* ----------------------- Start implementation -----------------------------*/
stanley1228 0:aefcdfe9ca2f 73
stanley1228 0:aefcdfe9ca2f 74 #if MB_FUNC_WRITE_HOLDING_ENABLED > 0
stanley1228 0:aefcdfe9ca2f 75
stanley1228 0:aefcdfe9ca2f 76 eMBException
stanley1228 0:aefcdfe9ca2f 77 eMBFuncWriteHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
stanley1228 0:aefcdfe9ca2f 78 {
stanley1228 0:aefcdfe9ca2f 79 USHORT usRegAddress;
stanley1228 0:aefcdfe9ca2f 80 eMBException eStatus = MB_EX_NONE;
stanley1228 0:aefcdfe9ca2f 81 eMBErrorCode eRegStatus;
stanley1228 0:aefcdfe9ca2f 82
stanley1228 0:aefcdfe9ca2f 83 if( *usLen == ( MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN ) )
stanley1228 0:aefcdfe9ca2f 84 {
stanley1228 0:aefcdfe9ca2f 85 usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF] << 8 );
stanley1228 0:aefcdfe9ca2f 86 usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF + 1] );
stanley1228 0:aefcdfe9ca2f 87 usRegAddress++;
stanley1228 0:aefcdfe9ca2f 88
stanley1228 0:aefcdfe9ca2f 89 /* Make callback to update the value. */
stanley1228 0:aefcdfe9ca2f 90 eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF],
stanley1228 0:aefcdfe9ca2f 91 usRegAddress, 1, MB_REG_WRITE );
stanley1228 0:aefcdfe9ca2f 92
stanley1228 0:aefcdfe9ca2f 93 /* If an error occured convert it into a Modbus exception. */
stanley1228 0:aefcdfe9ca2f 94 if( eRegStatus != MB_ENOERR )
stanley1228 0:aefcdfe9ca2f 95 {
stanley1228 0:aefcdfe9ca2f 96 eStatus = prveMBError2Exception( eRegStatus );
stanley1228 0:aefcdfe9ca2f 97 }
stanley1228 0:aefcdfe9ca2f 98 }
stanley1228 0:aefcdfe9ca2f 99 else
stanley1228 0:aefcdfe9ca2f 100 {
stanley1228 0:aefcdfe9ca2f 101 /* Can't be a valid request because the length is incorrect. */
stanley1228 0:aefcdfe9ca2f 102 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
stanley1228 0:aefcdfe9ca2f 103 }
stanley1228 0:aefcdfe9ca2f 104 return eStatus;
stanley1228 0:aefcdfe9ca2f 105 }
stanley1228 0:aefcdfe9ca2f 106 #endif
stanley1228 0:aefcdfe9ca2f 107
stanley1228 0:aefcdfe9ca2f 108 #if MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED > 0
stanley1228 0:aefcdfe9ca2f 109 eMBException
stanley1228 0:aefcdfe9ca2f 110 eMBFuncWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
stanley1228 0:aefcdfe9ca2f 111 {
stanley1228 0:aefcdfe9ca2f 112 USHORT usRegAddress;
stanley1228 0:aefcdfe9ca2f 113 USHORT usRegCount;
stanley1228 0:aefcdfe9ca2f 114 UCHAR ucRegByteCount;
stanley1228 0:aefcdfe9ca2f 115
stanley1228 0:aefcdfe9ca2f 116 eMBException eStatus = MB_EX_NONE;
stanley1228 0:aefcdfe9ca2f 117 eMBErrorCode eRegStatus;
stanley1228 0:aefcdfe9ca2f 118
stanley1228 0:aefcdfe9ca2f 119 if( *usLen >= ( MB_PDU_FUNC_WRITE_MUL_SIZE_MIN + MB_PDU_SIZE_MIN ) )
stanley1228 0:aefcdfe9ca2f 120 {
stanley1228 0:aefcdfe9ca2f 121 usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF] << 8 );
stanley1228 0:aefcdfe9ca2f 122 usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF + 1] );
stanley1228 0:aefcdfe9ca2f 123 usRegAddress++;
stanley1228 0:aefcdfe9ca2f 124
stanley1228 0:aefcdfe9ca2f 125 usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF] << 8 );
stanley1228 0:aefcdfe9ca2f 126 usRegCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF + 1] );
stanley1228 0:aefcdfe9ca2f 127
stanley1228 0:aefcdfe9ca2f 128 ucRegByteCount = pucFrame[MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF];
stanley1228 0:aefcdfe9ca2f 129
stanley1228 0:aefcdfe9ca2f 130 if( ( usRegCount >= 1 ) &&
stanley1228 0:aefcdfe9ca2f 131 ( usRegCount <= MB_PDU_FUNC_WRITE_MUL_REGCNT_MAX ) &&
stanley1228 0:aefcdfe9ca2f 132 ( ucRegByteCount == ( UCHAR ) ( 2 * usRegCount ) ) )
stanley1228 0:aefcdfe9ca2f 133 {
stanley1228 0:aefcdfe9ca2f 134 /* Make callback to update the register values. */
stanley1228 0:aefcdfe9ca2f 135 eRegStatus =
stanley1228 0:aefcdfe9ca2f 136 eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_WRITE_MUL_VALUES_OFF],
stanley1228 0:aefcdfe9ca2f 137 usRegAddress, usRegCount, MB_REG_WRITE );
stanley1228 0:aefcdfe9ca2f 138
stanley1228 0:aefcdfe9ca2f 139 /* If an error occured convert it into a Modbus exception. */
stanley1228 0:aefcdfe9ca2f 140 if( eRegStatus != MB_ENOERR )
stanley1228 0:aefcdfe9ca2f 141 {
stanley1228 0:aefcdfe9ca2f 142 eStatus = prveMBError2Exception( eRegStatus );
stanley1228 0:aefcdfe9ca2f 143 }
stanley1228 0:aefcdfe9ca2f 144 else
stanley1228 0:aefcdfe9ca2f 145 {
stanley1228 0:aefcdfe9ca2f 146 /* The response contains the function code, the starting
stanley1228 0:aefcdfe9ca2f 147 * address and the quantity of registers. We reuse the
stanley1228 0:aefcdfe9ca2f 148 * old values in the buffer because they are still valid.
stanley1228 0:aefcdfe9ca2f 149 */
stanley1228 0:aefcdfe9ca2f 150 *usLen = MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF;
stanley1228 0:aefcdfe9ca2f 151 }
stanley1228 0:aefcdfe9ca2f 152 }
stanley1228 0:aefcdfe9ca2f 153 else
stanley1228 0:aefcdfe9ca2f 154 {
stanley1228 0:aefcdfe9ca2f 155 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
stanley1228 0:aefcdfe9ca2f 156 }
stanley1228 0:aefcdfe9ca2f 157 }
stanley1228 0:aefcdfe9ca2f 158 else
stanley1228 0:aefcdfe9ca2f 159 {
stanley1228 0:aefcdfe9ca2f 160 /* Can't be a valid request because the length is incorrect. */
stanley1228 0:aefcdfe9ca2f 161 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
stanley1228 0:aefcdfe9ca2f 162 }
stanley1228 0:aefcdfe9ca2f 163 return eStatus;
stanley1228 0:aefcdfe9ca2f 164 }
stanley1228 0:aefcdfe9ca2f 165 #endif
stanley1228 0:aefcdfe9ca2f 166
stanley1228 0:aefcdfe9ca2f 167 #if MB_FUNC_READ_HOLDING_ENABLED > 0
stanley1228 0:aefcdfe9ca2f 168
stanley1228 0:aefcdfe9ca2f 169 eMBException
stanley1228 0:aefcdfe9ca2f 170 eMBFuncReadHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
stanley1228 0:aefcdfe9ca2f 171 {
stanley1228 0:aefcdfe9ca2f 172 USHORT usRegAddress;
stanley1228 0:aefcdfe9ca2f 173 USHORT usRegCount;
stanley1228 0:aefcdfe9ca2f 174 UCHAR *pucFrameCur;
stanley1228 0:aefcdfe9ca2f 175
stanley1228 0:aefcdfe9ca2f 176 eMBException eStatus = MB_EX_NONE;
stanley1228 0:aefcdfe9ca2f 177 eMBErrorCode eRegStatus;
stanley1228 0:aefcdfe9ca2f 178
stanley1228 0:aefcdfe9ca2f 179 if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) )
stanley1228 0:aefcdfe9ca2f 180 {
stanley1228 0:aefcdfe9ca2f 181 usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 );
stanley1228 0:aefcdfe9ca2f 182 usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] );
stanley1228 0:aefcdfe9ca2f 183 usRegAddress++;
stanley1228 0:aefcdfe9ca2f 184
stanley1228 0:aefcdfe9ca2f 185 usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF] << 8 );
stanley1228 0:aefcdfe9ca2f 186 usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF + 1] );
stanley1228 0:aefcdfe9ca2f 187
stanley1228 0:aefcdfe9ca2f 188 /* Check if the number of registers to read is valid. If not
stanley1228 0:aefcdfe9ca2f 189 * return Modbus illegal data value exception.
stanley1228 0:aefcdfe9ca2f 190 */
stanley1228 0:aefcdfe9ca2f 191 if( ( usRegCount >= 1 ) && ( usRegCount <= MB_PDU_FUNC_READ_REGCNT_MAX ) )
stanley1228 0:aefcdfe9ca2f 192 {
stanley1228 0:aefcdfe9ca2f 193 /* Set the current PDU data pointer to the beginning. */
stanley1228 0:aefcdfe9ca2f 194 pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF];
stanley1228 0:aefcdfe9ca2f 195 *usLen = MB_PDU_FUNC_OFF;
stanley1228 0:aefcdfe9ca2f 196
stanley1228 0:aefcdfe9ca2f 197 /* First byte contains the function code. */
stanley1228 0:aefcdfe9ca2f 198 *pucFrameCur++ = MB_FUNC_READ_HOLDING_REGISTER;
stanley1228 0:aefcdfe9ca2f 199 *usLen += 1;
stanley1228 0:aefcdfe9ca2f 200
stanley1228 0:aefcdfe9ca2f 201 /* Second byte in the response contain the number of bytes. */
stanley1228 0:aefcdfe9ca2f 202 *pucFrameCur++ = ( UCHAR ) ( usRegCount * 2 );
stanley1228 0:aefcdfe9ca2f 203 *usLen += 1;
stanley1228 0:aefcdfe9ca2f 204
stanley1228 0:aefcdfe9ca2f 205 /* Make callback to fill the buffer. */
stanley1228 0:aefcdfe9ca2f 206 eRegStatus = eMBRegHoldingCB( pucFrameCur, usRegAddress, usRegCount, MB_REG_READ );
stanley1228 0:aefcdfe9ca2f 207 /* If an error occured convert it into a Modbus exception. */
stanley1228 0:aefcdfe9ca2f 208 if( eRegStatus != MB_ENOERR )
stanley1228 0:aefcdfe9ca2f 209 {
stanley1228 0:aefcdfe9ca2f 210 eStatus = prveMBError2Exception( eRegStatus );
stanley1228 0:aefcdfe9ca2f 211 }
stanley1228 0:aefcdfe9ca2f 212 else
stanley1228 0:aefcdfe9ca2f 213 {
stanley1228 0:aefcdfe9ca2f 214 *usLen += usRegCount * 2;
stanley1228 0:aefcdfe9ca2f 215 }
stanley1228 0:aefcdfe9ca2f 216 }
stanley1228 0:aefcdfe9ca2f 217 else
stanley1228 0:aefcdfe9ca2f 218 {
stanley1228 0:aefcdfe9ca2f 219 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
stanley1228 0:aefcdfe9ca2f 220 }
stanley1228 0:aefcdfe9ca2f 221 }
stanley1228 0:aefcdfe9ca2f 222 else
stanley1228 0:aefcdfe9ca2f 223 {
stanley1228 0:aefcdfe9ca2f 224 /* Can't be a valid request because the length is incorrect. */
stanley1228 0:aefcdfe9ca2f 225 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
stanley1228 0:aefcdfe9ca2f 226 }
stanley1228 0:aefcdfe9ca2f 227 return eStatus;
stanley1228 0:aefcdfe9ca2f 228 }
stanley1228 0:aefcdfe9ca2f 229
stanley1228 0:aefcdfe9ca2f 230 #endif
stanley1228 0:aefcdfe9ca2f 231
stanley1228 0:aefcdfe9ca2f 232 #if MB_FUNC_READWRITE_HOLDING_ENABLED > 0
stanley1228 0:aefcdfe9ca2f 233
stanley1228 0:aefcdfe9ca2f 234 eMBException
stanley1228 0:aefcdfe9ca2f 235 eMBFuncReadWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
stanley1228 0:aefcdfe9ca2f 236 {
stanley1228 0:aefcdfe9ca2f 237 USHORT usRegReadAddress;
stanley1228 0:aefcdfe9ca2f 238 USHORT usRegReadCount;
stanley1228 0:aefcdfe9ca2f 239 USHORT usRegWriteAddress;
stanley1228 0:aefcdfe9ca2f 240 USHORT usRegWriteCount;
stanley1228 0:aefcdfe9ca2f 241 UCHAR ucRegWriteByteCount;
stanley1228 0:aefcdfe9ca2f 242 UCHAR *pucFrameCur;
stanley1228 0:aefcdfe9ca2f 243
stanley1228 0:aefcdfe9ca2f 244 eMBException eStatus = MB_EX_NONE;
stanley1228 0:aefcdfe9ca2f 245 eMBErrorCode eRegStatus;
stanley1228 0:aefcdfe9ca2f 246
stanley1228 0:aefcdfe9ca2f 247 if( *usLen >= ( MB_PDU_FUNC_READWRITE_SIZE_MIN + MB_PDU_SIZE_MIN ) )
stanley1228 0:aefcdfe9ca2f 248 {
stanley1228 0:aefcdfe9ca2f 249 usRegReadAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF] << 8U );
stanley1228 0:aefcdfe9ca2f 250 usRegReadAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF + 1] );
stanley1228 0:aefcdfe9ca2f 251 usRegReadAddress++;
stanley1228 0:aefcdfe9ca2f 252
stanley1228 0:aefcdfe9ca2f 253 usRegReadCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF] << 8U );
stanley1228 0:aefcdfe9ca2f 254 usRegReadCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF + 1] );
stanley1228 0:aefcdfe9ca2f 255
stanley1228 0:aefcdfe9ca2f 256 usRegWriteAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF] << 8U );
stanley1228 0:aefcdfe9ca2f 257 usRegWriteAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF + 1] );
stanley1228 0:aefcdfe9ca2f 258 usRegWriteAddress++;
stanley1228 0:aefcdfe9ca2f 259
stanley1228 0:aefcdfe9ca2f 260 usRegWriteCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF] << 8U );
stanley1228 0:aefcdfe9ca2f 261 usRegWriteCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF + 1] );
stanley1228 0:aefcdfe9ca2f 262
stanley1228 0:aefcdfe9ca2f 263 ucRegWriteByteCount = pucFrame[MB_PDU_FUNC_READWRITE_BYTECNT_OFF];
stanley1228 0:aefcdfe9ca2f 264
stanley1228 0:aefcdfe9ca2f 265 if( ( usRegReadCount >= 1 ) && ( usRegReadCount <= 0x7D ) &&
stanley1228 0:aefcdfe9ca2f 266 ( usRegWriteCount >= 1 ) && ( usRegWriteCount <= 0x79 ) &&
stanley1228 0:aefcdfe9ca2f 267 ( ( 2 * usRegWriteCount ) == ucRegWriteByteCount ) )
stanley1228 0:aefcdfe9ca2f 268 {
stanley1228 0:aefcdfe9ca2f 269 /* Make callback to update the register values. */
stanley1228 0:aefcdfe9ca2f 270 eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_READWRITE_WRITE_VALUES_OFF],
stanley1228 0:aefcdfe9ca2f 271 usRegWriteAddress, usRegWriteCount, MB_REG_WRITE );
stanley1228 0:aefcdfe9ca2f 272
stanley1228 0:aefcdfe9ca2f 273 if( eRegStatus == MB_ENOERR )
stanley1228 0:aefcdfe9ca2f 274 {
stanley1228 0:aefcdfe9ca2f 275 /* Set the current PDU data pointer to the beginning. */
stanley1228 0:aefcdfe9ca2f 276 pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF];
stanley1228 0:aefcdfe9ca2f 277 *usLen = MB_PDU_FUNC_OFF;
stanley1228 0:aefcdfe9ca2f 278
stanley1228 0:aefcdfe9ca2f 279 /* First byte contains the function code. */
stanley1228 0:aefcdfe9ca2f 280 *pucFrameCur++ = MB_FUNC_READWRITE_MULTIPLE_REGISTERS;
stanley1228 0:aefcdfe9ca2f 281 *usLen += 1;
stanley1228 0:aefcdfe9ca2f 282
stanley1228 0:aefcdfe9ca2f 283 /* Second byte in the response contain the number of bytes. */
stanley1228 0:aefcdfe9ca2f 284 *pucFrameCur++ = ( UCHAR ) ( usRegReadCount * 2 );
stanley1228 0:aefcdfe9ca2f 285 *usLen += 1;
stanley1228 0:aefcdfe9ca2f 286
stanley1228 0:aefcdfe9ca2f 287 /* Make the read callback. */
stanley1228 0:aefcdfe9ca2f 288 eRegStatus =
stanley1228 0:aefcdfe9ca2f 289 eMBRegHoldingCB( pucFrameCur, usRegReadAddress, usRegReadCount, MB_REG_READ );
stanley1228 0:aefcdfe9ca2f 290 if( eRegStatus == MB_ENOERR )
stanley1228 0:aefcdfe9ca2f 291 {
stanley1228 0:aefcdfe9ca2f 292 *usLen += 2 * usRegReadCount;
stanley1228 0:aefcdfe9ca2f 293 }
stanley1228 0:aefcdfe9ca2f 294 }
stanley1228 0:aefcdfe9ca2f 295 if( eRegStatus != MB_ENOERR )
stanley1228 0:aefcdfe9ca2f 296 {
stanley1228 0:aefcdfe9ca2f 297 eStatus = prveMBError2Exception( eRegStatus );
stanley1228 0:aefcdfe9ca2f 298 }
stanley1228 0:aefcdfe9ca2f 299 }
stanley1228 0:aefcdfe9ca2f 300 else
stanley1228 0:aefcdfe9ca2f 301 {
stanley1228 0:aefcdfe9ca2f 302 eStatus = MB_EX_ILLEGAL_DATA_VALUE;
stanley1228 0:aefcdfe9ca2f 303 }
stanley1228 0:aefcdfe9ca2f 304 }
stanley1228 0:aefcdfe9ca2f 305 return eStatus;
stanley1228 0:aefcdfe9ca2f 306 }
stanley1228 0:aefcdfe9ca2f 307
stanley1228 0:aefcdfe9ca2f 308 #endif