You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
308 lines
12 KiB
308 lines
12 KiB
/* |
|
* 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: mbfuncholding.c,v 1.12 2007/02/18 23:48:22 wolti Exp $ |
|
*/ |
|
|
|
/* ----------------------- System includes ----------------------------------*/ |
|
#include <nuttx/config.h> |
|
#include <stdlib.h> |
|
#include <string.h> |
|
|
|
/* ----------------------- Platform includes --------------------------------*/ |
|
#include "port.h" |
|
|
|
/* ----------------------- Modbus includes ----------------------------------*/ |
|
#include <apps/modbus/mb.h> |
|
#include <apps/modbus/mbframe.h> |
|
#include <apps/modbus/mbproto.h> |
|
|
|
/* ----------------------- Defines ------------------------------------------*/ |
|
#define MB_PDU_FUNC_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0) |
|
#define MB_PDU_FUNC_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 ) |
|
#define MB_PDU_FUNC_READ_SIZE ( 4 ) |
|
#define MB_PDU_FUNC_READ_REGCNT_MAX ( 0x007D ) |
|
|
|
#define MB_PDU_FUNC_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 0) |
|
#define MB_PDU_FUNC_WRITE_VALUE_OFF ( MB_PDU_DATA_OFF + 2 ) |
|
#define MB_PDU_FUNC_WRITE_SIZE ( 4 ) |
|
|
|
#define MB_PDU_FUNC_WRITE_MUL_ADDR_OFF ( MB_PDU_DATA_OFF + 0 ) |
|
#define MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 ) |
|
#define MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF ( MB_PDU_DATA_OFF + 4 ) |
|
#define MB_PDU_FUNC_WRITE_MUL_VALUES_OFF ( MB_PDU_DATA_OFF + 5 ) |
|
#define MB_PDU_FUNC_WRITE_MUL_SIZE_MIN ( 5 ) |
|
#define MB_PDU_FUNC_WRITE_MUL_REGCNT_MAX ( 0x0078 ) |
|
|
|
#define MB_PDU_FUNC_READWRITE_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0 ) |
|
#define MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 ) |
|
#define MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 4 ) |
|
#define MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF ( MB_PDU_DATA_OFF + 6 ) |
|
#define MB_PDU_FUNC_READWRITE_BYTECNT_OFF ( MB_PDU_DATA_OFF + 8 ) |
|
#define MB_PDU_FUNC_READWRITE_WRITE_VALUES_OFF ( MB_PDU_DATA_OFF + 9 ) |
|
#define MB_PDU_FUNC_READWRITE_SIZE_MIN ( 9 ) |
|
|
|
/* ----------------------- Static functions ---------------------------------*/ |
|
eMBException prveMBError2Exception( eMBErrorCode eErrorCode ); |
|
|
|
/* ----------------------- Start implementation -----------------------------*/ |
|
|
|
#ifdef CONFIG_MB_FUNC_WRITE_HOLDING_ENABLED |
|
|
|
eMBException |
|
eMBFuncWriteHoldingRegister( uint8_t * pucFrame, uint16_t * usLen ) |
|
{ |
|
uint16_t usRegAddress; |
|
eMBException eStatus = MB_EX_NONE; |
|
eMBErrorCode eRegStatus; |
|
|
|
if( *usLen == ( MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN ) ) |
|
{ |
|
usRegAddress = ( uint16_t )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF] << 8 ); |
|
usRegAddress |= ( uint16_t )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF + 1] ); |
|
usRegAddress++; |
|
|
|
/* Make callback to update the value. */ |
|
eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF], |
|
usRegAddress, 1, MB_REG_WRITE ); |
|
|
|
/* If an error occured convert it into a Modbus exception. */ |
|
if( eRegStatus != MB_ENOERR ) |
|
{ |
|
eStatus = prveMBError2Exception( eRegStatus ); |
|
} |
|
} |
|
else |
|
{ |
|
/* Can't be a valid request because the length is incorrect. */ |
|
eStatus = MB_EX_ILLEGAL_DATA_VALUE; |
|
} |
|
return eStatus; |
|
} |
|
#endif |
|
|
|
#ifdef CONFIG_MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED |
|
eMBException |
|
eMBFuncWriteMultipleHoldingRegister( uint8_t * pucFrame, uint16_t * usLen ) |
|
{ |
|
uint16_t usRegAddress; |
|
uint16_t usRegCount; |
|
uint8_t ucRegByteCount; |
|
|
|
eMBException eStatus = MB_EX_NONE; |
|
eMBErrorCode eRegStatus; |
|
|
|
if( *usLen >= ( MB_PDU_FUNC_WRITE_MUL_SIZE_MIN + MB_PDU_SIZE_MIN ) ) |
|
{ |
|
usRegAddress = ( uint16_t )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF] << 8 ); |
|
usRegAddress |= ( uint16_t )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF + 1] ); |
|
usRegAddress++; |
|
|
|
usRegCount = ( uint16_t )( pucFrame[MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF] << 8 ); |
|
usRegCount |= ( uint16_t )( pucFrame[MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF + 1] ); |
|
|
|
ucRegByteCount = pucFrame[MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF]; |
|
|
|
if( ( usRegCount >= 1 ) && |
|
( usRegCount <= MB_PDU_FUNC_WRITE_MUL_REGCNT_MAX ) && |
|
( ucRegByteCount == ( uint8_t ) ( 2 * usRegCount ) ) ) |
|
{ |
|
/* Make callback to update the register values. */ |
|
eRegStatus = |
|
eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_WRITE_MUL_VALUES_OFF], |
|
usRegAddress, usRegCount, MB_REG_WRITE ); |
|
|
|
/* If an error occured convert it into a Modbus exception. */ |
|
if( eRegStatus != MB_ENOERR ) |
|
{ |
|
eStatus = prveMBError2Exception( eRegStatus ); |
|
} |
|
else |
|
{ |
|
/* The response contains the function code, the starting |
|
* address and the quantity of registers. We reuse the |
|
* old values in the buffer because they are still valid. |
|
*/ |
|
*usLen = MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF; |
|
} |
|
} |
|
else |
|
{ |
|
eStatus = MB_EX_ILLEGAL_DATA_VALUE; |
|
} |
|
} |
|
else |
|
{ |
|
/* Can't be a valid request because the length is incorrect. */ |
|
eStatus = MB_EX_ILLEGAL_DATA_VALUE; |
|
} |
|
return eStatus; |
|
} |
|
#endif |
|
|
|
#ifdef CONFIG_MB_FUNC_READ_HOLDING_ENABLED |
|
|
|
eMBException |
|
eMBFuncReadHoldingRegister( uint8_t * pucFrame, uint16_t * usLen ) |
|
{ |
|
uint16_t usRegAddress; |
|
uint16_t usRegCount; |
|
uint8_t *pucFrameCur; |
|
|
|
eMBException eStatus = MB_EX_NONE; |
|
eMBErrorCode eRegStatus; |
|
|
|
if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) ) |
|
{ |
|
usRegAddress = ( uint16_t )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 ); |
|
usRegAddress |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] ); |
|
usRegAddress++; |
|
|
|
usRegCount = ( uint16_t )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF] << 8 ); |
|
usRegCount = ( uint16_t )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF + 1] ); |
|
|
|
/* Check if the number of registers to read is valid. If not |
|
* return Modbus illegal data value exception. |
|
*/ |
|
if( ( usRegCount >= 1 ) && ( usRegCount <= MB_PDU_FUNC_READ_REGCNT_MAX ) ) |
|
{ |
|
/* Set the current PDU data pointer to the beginning. */ |
|
pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF]; |
|
*usLen = MB_PDU_FUNC_OFF; |
|
|
|
/* First byte contains the function code. */ |
|
*pucFrameCur++ = MB_FUNC_READ_HOLDING_REGISTER; |
|
*usLen += 1; |
|
|
|
/* Second byte in the response contain the number of bytes. */ |
|
*pucFrameCur++ = ( uint8_t ) ( usRegCount * 2 ); |
|
*usLen += 1; |
|
|
|
/* Make callback to fill the buffer. */ |
|
eRegStatus = eMBRegHoldingCB( pucFrameCur, usRegAddress, usRegCount, MB_REG_READ ); |
|
/* If an error occured convert it into a Modbus exception. */ |
|
if( eRegStatus != MB_ENOERR ) |
|
{ |
|
eStatus = prveMBError2Exception( eRegStatus ); |
|
} |
|
else |
|
{ |
|
*usLen += usRegCount * 2; |
|
} |
|
} |
|
else |
|
{ |
|
eStatus = MB_EX_ILLEGAL_DATA_VALUE; |
|
} |
|
} |
|
else |
|
{ |
|
/* Can't be a valid request because the length is incorrect. */ |
|
eStatus = MB_EX_ILLEGAL_DATA_VALUE; |
|
} |
|
return eStatus; |
|
} |
|
|
|
#endif |
|
|
|
#ifdef CONFIG_MB_FUNC_READWRITE_HOLDING_ENABLED |
|
|
|
eMBException |
|
eMBFuncReadWriteMultipleHoldingRegister( uint8_t * pucFrame, uint16_t * usLen ) |
|
{ |
|
uint16_t usRegReadAddress; |
|
uint16_t usRegReadCount; |
|
uint16_t usRegWriteAddress; |
|
uint16_t usRegWriteCount; |
|
uint8_t ucRegWriteByteCount; |
|
uint8_t *pucFrameCur; |
|
|
|
eMBException eStatus = MB_EX_NONE; |
|
eMBErrorCode eRegStatus; |
|
|
|
if( *usLen >= ( MB_PDU_FUNC_READWRITE_SIZE_MIN + MB_PDU_SIZE_MIN ) ) |
|
{ |
|
usRegReadAddress = ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF] << 8U ); |
|
usRegReadAddress |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF + 1] ); |
|
usRegReadAddress++; |
|
|
|
usRegReadCount = ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF] << 8U ); |
|
usRegReadCount |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF + 1] ); |
|
|
|
usRegWriteAddress = ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF] << 8U ); |
|
usRegWriteAddress |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF + 1] ); |
|
usRegWriteAddress++; |
|
|
|
usRegWriteCount = ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF] << 8U ); |
|
usRegWriteCount |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF + 1] ); |
|
|
|
ucRegWriteByteCount = pucFrame[MB_PDU_FUNC_READWRITE_BYTECNT_OFF]; |
|
|
|
if( ( usRegReadCount >= 1 ) && ( usRegReadCount <= 0x7D ) && |
|
( usRegWriteCount >= 1 ) && ( usRegWriteCount <= 0x79 ) && |
|
( ( 2 * usRegWriteCount ) == ucRegWriteByteCount ) ) |
|
{ |
|
/* Make callback to update the register values. */ |
|
eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_READWRITE_WRITE_VALUES_OFF], |
|
usRegWriteAddress, usRegWriteCount, MB_REG_WRITE ); |
|
|
|
if( eRegStatus == MB_ENOERR ) |
|
{ |
|
/* Set the current PDU data pointer to the beginning. */ |
|
pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF]; |
|
*usLen = MB_PDU_FUNC_OFF; |
|
|
|
/* First byte contains the function code. */ |
|
*pucFrameCur++ = MB_FUNC_READWRITE_MULTIPLE_REGISTERS; |
|
*usLen += 1; |
|
|
|
/* Second byte in the response contain the number of bytes. */ |
|
*pucFrameCur++ = ( uint8_t ) ( usRegReadCount * 2 ); |
|
*usLen += 1; |
|
|
|
/* Make the read callback. */ |
|
eRegStatus = |
|
eMBRegHoldingCB( pucFrameCur, usRegReadAddress, usRegReadCount, MB_REG_READ ); |
|
if( eRegStatus == MB_ENOERR ) |
|
{ |
|
*usLen += 2 * usRegReadCount; |
|
} |
|
} |
|
if( eRegStatus != MB_ENOERR ) |
|
{ |
|
eStatus = prveMBError2Exception( eRegStatus ); |
|
} |
|
} |
|
else |
|
{ |
|
eStatus = MB_EX_ILLEGAL_DATA_VALUE; |
|
} |
|
} |
|
return eStatus; |
|
} |
|
|
|
#endif
|
|
|