mirror of
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synced 2026-10-23 05:13:34 +08:00
Check-in of initial, unmodified freemodbus-v1.5.0
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4960 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
@@ -0,0 +1,54 @@
|
||||
apps/modbus README
|
||||
==================
|
||||
|
||||
This directory contains a port of last open source version of freemodbus
|
||||
(BSD license). The code in this directory is a subset of freemodbus version
|
||||
1.5.0 (June 6, 2010) that can be downloaded in its entirety from http://developer.berlios.de/project/showfiles.php?group_id=6120.
|
||||
|
||||
Directory Structure/Relation to freemodbus-v1.5.0
|
||||
-------------------------------------------------
|
||||
|
||||
The original freemodbus download consists of several directories. This
|
||||
subset takes only the contents of one directory, modbus/, that implements
|
||||
the core modbus logic and integrates that directory into the NuttX build
|
||||
system. The mapping between freemodbus-v1.5.0 and the nuttx directories
|
||||
is shown below:
|
||||
|
||||
--------------------------- ----------------------------------------------
|
||||
freemodbus-v1.5.0 Nuttx
|
||||
--------------------------- ----------------------------------------------
|
||||
All top level .txt files Not included
|
||||
demo/ Not included. This directory contains demo
|
||||
and porting code for a variety of platforms.
|
||||
The NuttX demo was ported from the the LINUX
|
||||
demo in this director and can be found at
|
||||
apps/examples/modbus.
|
||||
doc/ Note included. This directory contains Doxygen
|
||||
support files.
|
||||
modbus/ Included in its entirety in various locations:
|
||||
ascii apps/modbus/ascii
|
||||
functions apps/modbus/functions
|
||||
include apps/include/modbus
|
||||
mb.c apps/modbus/mb.c
|
||||
rtu apps/modbus/rtu
|
||||
tcp apps/modbus/tcp
|
||||
tools/ Note included. This directory contain Doxygen
|
||||
tools.
|
||||
--------------------------- ----------------------------------------------
|
||||
|
||||
So this directory is equivalent to the freemodbus-v1.5.0/modbus
|
||||
directory except that (1) it may include modifications for the integration
|
||||
with NuttX and (2) the modbus/include directory was moved to apps/modbus.
|
||||
|
||||
The original, unmodified freemodbus-v1.5.0 was checked in as SVN revision
|
||||
4937
|
||||
|
||||
The other directory here, nuttx/, implements the NuttX modbus interface.
|
||||
It derives from the freemodbus-v1.5.0/demo/LINUX/port directory.
|
||||
|
||||
Note
|
||||
====
|
||||
|
||||
The developer of freemodbus, Christian Walter, is still developing Modbus
|
||||
libraries, although they are now commercial. See
|
||||
http://www.embedded-solutions.at/ for further information.
|
||||
@@ -0,0 +1,486 @@
|
||||
/*
|
||||
* 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: mbascii.c,v 1.17 2010/06/06 13:47:07 wolti Exp $
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbconfig.h"
|
||||
#include "mbascii.h"
|
||||
#include "mbframe.h"
|
||||
|
||||
#include "mbcrc.h"
|
||||
#include "mbport.h"
|
||||
|
||||
#if MB_ASCII_ENABLED > 0
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_ASCII_DEFAULT_CR '\r' /*!< Default CR character for Modbus ASCII. */
|
||||
#define MB_ASCII_DEFAULT_LF '\n' /*!< Default LF character for Modbus ASCII. */
|
||||
#define MB_SER_PDU_SIZE_MIN 3 /*!< Minimum size of a Modbus ASCII frame. */
|
||||
#define MB_SER_PDU_SIZE_MAX 256 /*!< Maximum size of a Modbus ASCII frame. */
|
||||
#define MB_SER_PDU_SIZE_LRC 1 /*!< Size of LRC field in PDU. */
|
||||
#define MB_SER_PDU_ADDR_OFF 0 /*!< Offset of slave address in Ser-PDU. */
|
||||
#define MB_SER_PDU_PDU_OFF 1 /*!< Offset of Modbus-PDU in Ser-PDU. */
|
||||
|
||||
/* ----------------------- Type definitions ---------------------------------*/
|
||||
typedef enum
|
||||
{
|
||||
STATE_RX_IDLE, /*!< Receiver is in idle state. */
|
||||
STATE_RX_RCV, /*!< Frame is beeing received. */
|
||||
STATE_RX_WAIT_EOF /*!< Wait for End of Frame. */
|
||||
} eMBRcvState;
|
||||
|
||||
typedef enum
|
||||
{
|
||||
STATE_TX_IDLE, /*!< Transmitter is in idle state. */
|
||||
STATE_TX_START, /*!< Starting transmission (':' sent). */
|
||||
STATE_TX_DATA, /*!< Sending of data (Address, Data, LRC). */
|
||||
STATE_TX_END, /*!< End of transmission. */
|
||||
STATE_TX_NOTIFY /*!< Notify sender that the frame has been sent. */
|
||||
} eMBSndState;
|
||||
|
||||
typedef enum
|
||||
{
|
||||
BYTE_HIGH_NIBBLE, /*!< Character for high nibble of byte. */
|
||||
BYTE_LOW_NIBBLE /*!< Character for low nibble of byte. */
|
||||
} eMBBytePos;
|
||||
|
||||
/* ----------------------- Static functions ---------------------------------*/
|
||||
static UCHAR prvucMBCHAR2BIN( UCHAR ucCharacter );
|
||||
|
||||
static UCHAR prvucMBBIN2CHAR( UCHAR ucByte );
|
||||
|
||||
static UCHAR prvucMBLRC( UCHAR * pucFrame, USHORT usLen );
|
||||
|
||||
/* ----------------------- Static variables ---------------------------------*/
|
||||
static volatile eMBSndState eSndState;
|
||||
static volatile eMBRcvState eRcvState;
|
||||
|
||||
/* We reuse the Modbus RTU buffer because only one buffer is needed and the
|
||||
* RTU buffer is bigger. */
|
||||
extern volatile UCHAR ucRTUBuf[];
|
||||
static volatile UCHAR *ucASCIIBuf = ucRTUBuf;
|
||||
|
||||
static volatile USHORT usRcvBufferPos;
|
||||
static volatile eMBBytePos eBytePos;
|
||||
|
||||
static volatile UCHAR *pucSndBufferCur;
|
||||
static volatile USHORT usSndBufferCount;
|
||||
|
||||
static volatile UCHAR ucLRC;
|
||||
static volatile UCHAR ucMBLFCharacter;
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
eMBErrorCode
|
||||
eMBASCIIInit( UCHAR ucSlaveAddress, UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
( void )ucSlaveAddress;
|
||||
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
ucMBLFCharacter = MB_ASCII_DEFAULT_LF;
|
||||
|
||||
if( xMBPortSerialInit( ucPort, ulBaudRate, 7, eParity ) != TRUE )
|
||||
{
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
else if( xMBPortTimersInit( MB_ASCII_TIMEOUT_SEC * 20000UL ) != TRUE )
|
||||
{
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
void
|
||||
eMBASCIIStart( void )
|
||||
{
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
vMBPortSerialEnable( TRUE, FALSE );
|
||||
eRcvState = STATE_RX_IDLE;
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
|
||||
/* No special startup required for ASCII. */
|
||||
( void )xMBPortEventPost( EV_READY );
|
||||
}
|
||||
|
||||
void
|
||||
eMBASCIIStop( void )
|
||||
{
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
vMBPortSerialEnable( FALSE, FALSE );
|
||||
vMBPortTimersDisable( );
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBASCIIReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame, USHORT * pusLength )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
assert( usRcvBufferPos < MB_SER_PDU_SIZE_MAX );
|
||||
|
||||
/* Length and CRC check */
|
||||
if( ( usRcvBufferPos >= MB_SER_PDU_SIZE_MIN )
|
||||
&& ( prvucMBLRC( ( UCHAR * ) ucASCIIBuf, usRcvBufferPos ) == 0 ) )
|
||||
{
|
||||
/* Save the address field. All frames are passed to the upper layed
|
||||
* and the decision if a frame is used is done there.
|
||||
*/
|
||||
*pucRcvAddress = ucASCIIBuf[MB_SER_PDU_ADDR_OFF];
|
||||
|
||||
/* Total length of Modbus-PDU is Modbus-Serial-Line-PDU minus
|
||||
* size of address field and CRC checksum.
|
||||
*/
|
||||
*pusLength = ( USHORT )( usRcvBufferPos - MB_SER_PDU_PDU_OFF - MB_SER_PDU_SIZE_LRC );
|
||||
|
||||
/* Return the start of the Modbus PDU to the caller. */
|
||||
*pucFrame = ( UCHAR * ) & ucASCIIBuf[MB_SER_PDU_PDU_OFF];
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBASCIISend( UCHAR ucSlaveAddress, const UCHAR * pucFrame, USHORT usLength )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
UCHAR usLRC;
|
||||
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
/* Check if the receiver is still in idle state. If not we where too
|
||||
* slow with processing the received frame and the master sent another
|
||||
* frame on the network. We have to abort sending the frame.
|
||||
*/
|
||||
if( eRcvState == STATE_RX_IDLE )
|
||||
{
|
||||
/* First byte before the Modbus-PDU is the slave address. */
|
||||
pucSndBufferCur = ( UCHAR * ) pucFrame - 1;
|
||||
usSndBufferCount = 1;
|
||||
|
||||
/* Now copy the Modbus-PDU into the Modbus-Serial-Line-PDU. */
|
||||
pucSndBufferCur[MB_SER_PDU_ADDR_OFF] = ucSlaveAddress;
|
||||
usSndBufferCount += usLength;
|
||||
|
||||
/* Calculate LRC checksum for Modbus-Serial-Line-PDU. */
|
||||
usLRC = prvucMBLRC( ( UCHAR * ) pucSndBufferCur, usSndBufferCount );
|
||||
ucASCIIBuf[usSndBufferCount++] = usLRC;
|
||||
|
||||
/* Activate the transmitter. */
|
||||
eSndState = STATE_TX_START;
|
||||
vMBPortSerialEnable( FALSE, TRUE );
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBASCIIReceiveFSM( void )
|
||||
{
|
||||
BOOL xNeedPoll = FALSE;
|
||||
UCHAR ucByte;
|
||||
UCHAR ucResult;
|
||||
|
||||
assert( eSndState == STATE_TX_IDLE );
|
||||
|
||||
( void )xMBPortSerialGetByte( ( CHAR * ) & ucByte );
|
||||
switch ( eRcvState )
|
||||
{
|
||||
/* A new character is received. If the character is a ':' the input
|
||||
* buffer is cleared. A CR-character signals the end of the data
|
||||
* block. Other characters are part of the data block and their
|
||||
* ASCII value is converted back to a binary representation.
|
||||
*/
|
||||
case STATE_RX_RCV:
|
||||
/* Enable timer for character timeout. */
|
||||
vMBPortTimersEnable( );
|
||||
if( ucByte == ':' )
|
||||
{
|
||||
/* Empty receive buffer. */
|
||||
eBytePos = BYTE_HIGH_NIBBLE;
|
||||
usRcvBufferPos = 0;
|
||||
}
|
||||
else if( ucByte == MB_ASCII_DEFAULT_CR )
|
||||
{
|
||||
eRcvState = STATE_RX_WAIT_EOF;
|
||||
}
|
||||
else
|
||||
{
|
||||
ucResult = prvucMBCHAR2BIN( ucByte );
|
||||
switch ( eBytePos )
|
||||
{
|
||||
/* High nibble of the byte comes first. We check for
|
||||
* a buffer overflow here. */
|
||||
case BYTE_HIGH_NIBBLE:
|
||||
if( usRcvBufferPos < MB_SER_PDU_SIZE_MAX )
|
||||
{
|
||||
ucASCIIBuf[usRcvBufferPos] = ( UCHAR )( ucResult << 4 );
|
||||
eBytePos = BYTE_LOW_NIBBLE;
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* not handled in Modbus specification but seems
|
||||
* a resonable implementation. */
|
||||
eRcvState = STATE_RX_IDLE;
|
||||
/* Disable previously activated timer because of error state. */
|
||||
vMBPortTimersDisable( );
|
||||
}
|
||||
break;
|
||||
|
||||
case BYTE_LOW_NIBBLE:
|
||||
ucASCIIBuf[usRcvBufferPos] |= ucResult;
|
||||
usRcvBufferPos++;
|
||||
eBytePos = BYTE_HIGH_NIBBLE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
case STATE_RX_WAIT_EOF:
|
||||
if( ucByte == ucMBLFCharacter )
|
||||
{
|
||||
/* Disable character timeout timer because all characters are
|
||||
* received. */
|
||||
vMBPortTimersDisable( );
|
||||
/* Receiver is again in idle state. */
|
||||
eRcvState = STATE_RX_IDLE;
|
||||
|
||||
/* Notify the caller of eMBASCIIReceive that a new frame
|
||||
* was received. */
|
||||
xNeedPoll = xMBPortEventPost( EV_FRAME_RECEIVED );
|
||||
}
|
||||
else if( ucByte == ':' )
|
||||
{
|
||||
/* Empty receive buffer and back to receive state. */
|
||||
eBytePos = BYTE_HIGH_NIBBLE;
|
||||
usRcvBufferPos = 0;
|
||||
eRcvState = STATE_RX_RCV;
|
||||
|
||||
/* Enable timer for character timeout. */
|
||||
vMBPortTimersEnable( );
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Frame is not okay. Delete entire frame. */
|
||||
eRcvState = STATE_RX_IDLE;
|
||||
}
|
||||
break;
|
||||
|
||||
case STATE_RX_IDLE:
|
||||
if( ucByte == ':' )
|
||||
{
|
||||
/* Enable timer for character timeout. */
|
||||
vMBPortTimersEnable( );
|
||||
/* Reset the input buffers to store the frame. */
|
||||
usRcvBufferPos = 0;;
|
||||
eBytePos = BYTE_HIGH_NIBBLE;
|
||||
eRcvState = STATE_RX_RCV;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
return xNeedPoll;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBASCIITransmitFSM( void )
|
||||
{
|
||||
BOOL xNeedPoll = FALSE;
|
||||
UCHAR ucByte;
|
||||
|
||||
assert( eRcvState == STATE_RX_IDLE );
|
||||
switch ( eSndState )
|
||||
{
|
||||
/* Start of transmission. The start of a frame is defined by sending
|
||||
* the character ':'. */
|
||||
case STATE_TX_START:
|
||||
ucByte = ':';
|
||||
xMBPortSerialPutByte( ( CHAR )ucByte );
|
||||
eSndState = STATE_TX_DATA;
|
||||
eBytePos = BYTE_HIGH_NIBBLE;
|
||||
break;
|
||||
|
||||
/* Send the data block. Each data byte is encoded as a character hex
|
||||
* stream with the high nibble sent first and the low nibble sent
|
||||
* last. If all data bytes are exhausted we send a '\r' character
|
||||
* to end the transmission. */
|
||||
case STATE_TX_DATA:
|
||||
if( usSndBufferCount > 0 )
|
||||
{
|
||||
switch ( eBytePos )
|
||||
{
|
||||
case BYTE_HIGH_NIBBLE:
|
||||
ucByte = prvucMBBIN2CHAR( ( UCHAR )( *pucSndBufferCur >> 4 ) );
|
||||
xMBPortSerialPutByte( ( CHAR ) ucByte );
|
||||
eBytePos = BYTE_LOW_NIBBLE;
|
||||
break;
|
||||
|
||||
case BYTE_LOW_NIBBLE:
|
||||
ucByte = prvucMBBIN2CHAR( ( UCHAR )( *pucSndBufferCur & 0x0F ) );
|
||||
xMBPortSerialPutByte( ( CHAR )ucByte );
|
||||
pucSndBufferCur++;
|
||||
eBytePos = BYTE_HIGH_NIBBLE;
|
||||
usSndBufferCount--;
|
||||
break;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
xMBPortSerialPutByte( MB_ASCII_DEFAULT_CR );
|
||||
eSndState = STATE_TX_END;
|
||||
}
|
||||
break;
|
||||
|
||||
/* Finish the frame by sending a LF character. */
|
||||
case STATE_TX_END:
|
||||
xMBPortSerialPutByte( ( CHAR )ucMBLFCharacter );
|
||||
/* We need another state to make sure that the CR character has
|
||||
* been sent. */
|
||||
eSndState = STATE_TX_NOTIFY;
|
||||
break;
|
||||
|
||||
/* Notify the task which called eMBASCIISend that the frame has
|
||||
* been sent. */
|
||||
case STATE_TX_NOTIFY:
|
||||
eSndState = STATE_TX_IDLE;
|
||||
xNeedPoll = xMBPortEventPost( EV_FRAME_SENT );
|
||||
|
||||
/* Disable transmitter. This prevents another transmit buffer
|
||||
* empty interrupt. */
|
||||
vMBPortSerialEnable( TRUE, FALSE );
|
||||
eSndState = STATE_TX_IDLE;
|
||||
break;
|
||||
|
||||
/* We should not get a transmitter event if the transmitter is in
|
||||
* idle state. */
|
||||
case STATE_TX_IDLE:
|
||||
/* enable receiver/disable transmitter. */
|
||||
vMBPortSerialEnable( TRUE, FALSE );
|
||||
break;
|
||||
}
|
||||
|
||||
return xNeedPoll;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBASCIITimerT1SExpired( void )
|
||||
{
|
||||
switch ( eRcvState )
|
||||
{
|
||||
/* If we have a timeout we go back to the idle state and wait for
|
||||
* the next frame.
|
||||
*/
|
||||
case STATE_RX_RCV:
|
||||
case STATE_RX_WAIT_EOF:
|
||||
eRcvState = STATE_RX_IDLE;
|
||||
break;
|
||||
|
||||
default:
|
||||
assert( ( eRcvState == STATE_RX_RCV ) || ( eRcvState == STATE_RX_WAIT_EOF ) );
|
||||
break;
|
||||
}
|
||||
vMBPortTimersDisable( );
|
||||
|
||||
/* no context switch required. */
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
|
||||
static UCHAR
|
||||
prvucMBCHAR2BIN( UCHAR ucCharacter )
|
||||
{
|
||||
if( ( ucCharacter >= '0' ) && ( ucCharacter <= '9' ) )
|
||||
{
|
||||
return ( UCHAR )( ucCharacter - '0' );
|
||||
}
|
||||
else if( ( ucCharacter >= 'A' ) && ( ucCharacter <= 'F' ) )
|
||||
{
|
||||
return ( UCHAR )( ucCharacter - 'A' + 0x0A );
|
||||
}
|
||||
else
|
||||
{
|
||||
return 0xFF;
|
||||
}
|
||||
}
|
||||
|
||||
static UCHAR
|
||||
prvucMBBIN2CHAR( UCHAR ucByte )
|
||||
{
|
||||
if( ucByte <= 0x09 )
|
||||
{
|
||||
return ( UCHAR )( '0' + ucByte );
|
||||
}
|
||||
else if( ( ucByte >= 0x0A ) && ( ucByte <= 0x0F ) )
|
||||
{
|
||||
return ( UCHAR )( ucByte - 0x0A + 'A' );
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Programming error. */
|
||||
assert( 0 );
|
||||
}
|
||||
return '0';
|
||||
}
|
||||
|
||||
|
||||
static UCHAR
|
||||
prvucMBLRC( UCHAR * pucFrame, USHORT usLen )
|
||||
{
|
||||
UCHAR ucLRC = 0; /* LRC char initialized */
|
||||
|
||||
while( usLen-- )
|
||||
{
|
||||
ucLRC += *pucFrame++; /* Add buffer byte without carry */
|
||||
}
|
||||
|
||||
/* Return twos complement */
|
||||
ucLRC = ( UCHAR ) ( -( ( CHAR ) ucLRC ) );
|
||||
return ucLRC;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,56 @@
|
||||
/*
|
||||
* 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: mbascii.h,v 1.8 2006/12/07 22:10:34 wolti Exp $
|
||||
*/
|
||||
|
||||
#ifndef _MB_ASCII_H
|
||||
#define _MB_ASCII_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
|
||||
#if MB_ASCII_ENABLED > 0
|
||||
eMBErrorCode eMBASCIIInit( UCHAR slaveAddress, UCHAR ucPort,
|
||||
ULONG ulBaudRate, eMBParity eParity );
|
||||
void eMBASCIIStart( void );
|
||||
void eMBASCIIStop( void );
|
||||
|
||||
eMBErrorCode eMBASCIIReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame,
|
||||
USHORT * pusLength );
|
||||
eMBErrorCode eMBASCIISend( UCHAR slaveAddress, const UCHAR * pucFrame,
|
||||
USHORT usLength );
|
||||
BOOL xMBASCIIReceiveFSM( void );
|
||||
BOOL xMBASCIITransmitFSM( void );
|
||||
BOOL xMBASCIITimerT1SExpired( void );
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,270 @@
|
||||
/*
|
||||
* 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: mbfunccoils.c,v 1.8 2007/02/18 23:47:16 wolti Exp $
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbproto.h"
|
||||
#include "mbconfig.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_PDU_FUNC_READ_ADDR_OFF ( MB_PDU_DATA_OFF )
|
||||
#define MB_PDU_FUNC_READ_COILCNT_OFF ( MB_PDU_DATA_OFF + 2 )
|
||||
#define MB_PDU_FUNC_READ_SIZE ( 4 )
|
||||
#define MB_PDU_FUNC_READ_COILCNT_MAX ( 0x07D0 )
|
||||
|
||||
#define MB_PDU_FUNC_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF )
|
||||
#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 )
|
||||
#define MB_PDU_FUNC_WRITE_MUL_COILCNT_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_COILCNT_MAX ( 0x07B0 )
|
||||
|
||||
/* ----------------------- Static functions ---------------------------------*/
|
||||
eMBException prveMBError2Exception( eMBErrorCode eErrorCode );
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
|
||||
#if MB_FUNC_READ_COILS_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncReadCoils( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usCoilCount;
|
||||
UCHAR ucNBytes;
|
||||
UCHAR *pucFrameCur;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usCoilCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_COILCNT_OFF] << 8 );
|
||||
usCoilCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_COILCNT_OFF + 1] );
|
||||
|
||||
/* Check if the number of registers to read is valid. If not
|
||||
* return Modbus illegal data value exception.
|
||||
*/
|
||||
if( ( usCoilCount >= 1 ) &&
|
||||
( usCoilCount < MB_PDU_FUNC_READ_COILCNT_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_COILS;
|
||||
*usLen += 1;
|
||||
|
||||
/* Test if the quantity of coils is a multiple of 8. If not last
|
||||
* byte is only partially field with unused coils set to zero. */
|
||||
if( ( usCoilCount & 0x0007 ) != 0 )
|
||||
{
|
||||
ucNBytes = ( UCHAR )( usCoilCount / 8 + 1 );
|
||||
}
|
||||
else
|
||||
{
|
||||
ucNBytes = ( UCHAR )( usCoilCount / 8 );
|
||||
}
|
||||
*pucFrameCur++ = ucNBytes;
|
||||
*usLen += 1;
|
||||
|
||||
eRegStatus =
|
||||
eMBRegCoilsCB( pucFrameCur, usRegAddress, usCoilCount,
|
||||
MB_REG_READ );
|
||||
|
||||
/* 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 += ucNBytes;;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Can't be a valid read coil register request because the length
|
||||
* is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#if MB_FUNC_WRITE_COIL_ENABLED > 0
|
||||
eMBException
|
||||
eMBFuncWriteCoil( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
UCHAR ucBuf[2];
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
if( ( pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF + 1] == 0x00 ) &&
|
||||
( ( pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF] == 0xFF ) ||
|
||||
( pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF] == 0x00 ) ) )
|
||||
{
|
||||
ucBuf[1] = 0;
|
||||
if( pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF] == 0xFF )
|
||||
{
|
||||
ucBuf[0] = 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
ucBuf[0] = 0;
|
||||
}
|
||||
eRegStatus =
|
||||
eMBRegCoilsCB( &ucBuf[0], usRegAddress, 1, MB_REG_WRITE );
|
||||
|
||||
/* If an error occured convert it into a Modbus exception. */
|
||||
if( eRegStatus != MB_ENOERR )
|
||||
{
|
||||
eStatus = prveMBError2Exception( eRegStatus );
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Can't be a valid write coil register request because the length
|
||||
* is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_WRITE_MULTIPLE_COILS_ENABLED > 0
|
||||
eMBException
|
||||
eMBFuncWriteMultipleCoils( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usCoilCnt;
|
||||
UCHAR ucByteCount;
|
||||
UCHAR ucByteCountVerify;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen > ( MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usCoilCnt = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_COILCNT_OFF] << 8 );
|
||||
usCoilCnt |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_COILCNT_OFF + 1] );
|
||||
|
||||
ucByteCount = pucFrame[MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF];
|
||||
|
||||
/* Compute the number of expected bytes in the request. */
|
||||
if( ( usCoilCnt & 0x0007 ) != 0 )
|
||||
{
|
||||
ucByteCountVerify = ( UCHAR )( usCoilCnt / 8 + 1 );
|
||||
}
|
||||
else
|
||||
{
|
||||
ucByteCountVerify = ( UCHAR )( usCoilCnt / 8 );
|
||||
}
|
||||
|
||||
if( ( usCoilCnt >= 1 ) &&
|
||||
( usCoilCnt <= MB_PDU_FUNC_WRITE_MUL_COILCNT_MAX ) &&
|
||||
( ucByteCountVerify == ucByteCount ) )
|
||||
{
|
||||
eRegStatus =
|
||||
eMBRegCoilsCB( &pucFrame[MB_PDU_FUNC_WRITE_MUL_VALUES_OFF],
|
||||
usRegAddress, usCoilCnt, 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 write coil register request because the length
|
||||
* is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,29 @@
|
||||
/*
|
||||
* 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: mbfuncdiag.c,v 1.3 2006/12/07 22:10:34 wolti Exp $
|
||||
*/
|
||||
@@ -0,0 +1,125 @@
|
||||
/*
|
||||
* FreeRTOS Modbus Libary: A Modbus serial implementation for FreeRTOS
|
||||
* Copyright (C) 2006 Christian Walter <wolti@sil.at>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbproto.h"
|
||||
#include "mbconfig.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_PDU_FUNC_READ_ADDR_OFF ( MB_PDU_DATA_OFF )
|
||||
#define MB_PDU_FUNC_READ_DISCCNT_OFF ( MB_PDU_DATA_OFF + 2 )
|
||||
#define MB_PDU_FUNC_READ_SIZE ( 4 )
|
||||
#define MB_PDU_FUNC_READ_DISCCNT_MAX ( 0x07D0 )
|
||||
|
||||
/* ----------------------- Static functions ---------------------------------*/
|
||||
eMBException prveMBError2Exception( eMBErrorCode eErrorCode );
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
|
||||
#if MB_FUNC_READ_COILS_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncReadDiscreteInputs( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usDiscreteCnt;
|
||||
UCHAR ucNBytes;
|
||||
UCHAR *pucFrameCur;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usDiscreteCnt = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_DISCCNT_OFF] << 8 );
|
||||
usDiscreteCnt |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_DISCCNT_OFF + 1] );
|
||||
|
||||
/* Check if the number of registers to read is valid. If not
|
||||
* return Modbus illegal data value exception.
|
||||
*/
|
||||
if( ( usDiscreteCnt >= 1 ) &&
|
||||
( usDiscreteCnt < MB_PDU_FUNC_READ_DISCCNT_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_DISCRETE_INPUTS;
|
||||
*usLen += 1;
|
||||
|
||||
/* Test if the quantity of coils is a multiple of 8. If not last
|
||||
* byte is only partially field with unused coils set to zero. */
|
||||
if( ( usDiscreteCnt & 0x0007 ) != 0 )
|
||||
{
|
||||
ucNBytes = ( UCHAR ) ( usDiscreteCnt / 8 + 1 );
|
||||
}
|
||||
else
|
||||
{
|
||||
ucNBytes = ( UCHAR ) ( usDiscreteCnt / 8 );
|
||||
}
|
||||
*pucFrameCur++ = ucNBytes;
|
||||
*usLen += 1;
|
||||
|
||||
eRegStatus =
|
||||
eMBRegDiscreteCB( pucFrameCur, usRegAddress, usDiscreteCnt );
|
||||
|
||||
/* 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 += ucNBytes;;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Can't be a valid read coil register request because the length
|
||||
* is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,308 @@
|
||||
/*
|
||||
* 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 "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbproto.h"
|
||||
#include "mbconfig.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 -----------------------------*/
|
||||
|
||||
#if MB_FUNC_WRITE_HOLDING_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncWriteHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( 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
|
||||
|
||||
#if MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED > 0
|
||||
eMBException
|
||||
eMBFuncWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usRegCount;
|
||||
UCHAR ucRegByteCount;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen >= ( MB_PDU_FUNC_WRITE_MUL_SIZE_MIN + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF] << 8 );
|
||||
usRegCount |= ( USHORT )( 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 == ( UCHAR ) ( 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
|
||||
|
||||
#if MB_FUNC_READ_HOLDING_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncReadHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usRegCount;
|
||||
UCHAR *pucFrameCur;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF] << 8 );
|
||||
usRegCount = ( USHORT )( 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++ = ( UCHAR ) ( 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
|
||||
|
||||
#if MB_FUNC_READWRITE_HOLDING_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncReadWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegReadAddress;
|
||||
USHORT usRegReadCount;
|
||||
USHORT usRegWriteAddress;
|
||||
USHORT usRegWriteCount;
|
||||
UCHAR ucRegWriteByteCount;
|
||||
UCHAR *pucFrameCur;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen >= ( MB_PDU_FUNC_READWRITE_SIZE_MIN + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegReadAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF] << 8U );
|
||||
usRegReadAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF + 1] );
|
||||
usRegReadAddress++;
|
||||
|
||||
usRegReadCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF] << 8U );
|
||||
usRegReadCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF + 1] );
|
||||
|
||||
usRegWriteAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF] << 8U );
|
||||
usRegWriteAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF + 1] );
|
||||
usRegWriteAddress++;
|
||||
|
||||
usRegWriteCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF] << 8U );
|
||||
usRegWriteCount |= ( USHORT )( 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++ = ( UCHAR ) ( 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
|
||||
@@ -0,0 +1,122 @@
|
||||
/*
|
||||
* 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: mbfuncinput.c,v 1.10 2007/09/12 10:15:56 wolti Exp $
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbproto.h"
|
||||
#include "mbconfig.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_PDU_FUNC_READ_ADDR_OFF ( MB_PDU_DATA_OFF )
|
||||
#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_READ_RSP_BYTECNT_OFF ( MB_PDU_DATA_OFF )
|
||||
|
||||
/* ----------------------- Static functions ---------------------------------*/
|
||||
eMBException prveMBError2Exception( eMBErrorCode eErrorCode );
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
#if MB_FUNC_READ_INPUT_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncReadInputRegister( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usRegCount;
|
||||
UCHAR *pucFrameCur;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF] << 8 );
|
||||
usRegCount |= ( USHORT )( 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_INPUT_REGISTER;
|
||||
*usLen += 1;
|
||||
|
||||
/* Second byte in the response contain the number of bytes. */
|
||||
*pucFrameCur++ = ( UCHAR )( usRegCount * 2 );
|
||||
*usLen += 1;
|
||||
|
||||
eRegStatus =
|
||||
eMBRegInputCB( pucFrameCur, usRegAddress, usRegCount );
|
||||
|
||||
/* 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 read input register request because the length
|
||||
* is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,88 @@
|
||||
/*
|
||||
* 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: mbfuncother.c,v 1.8 2006/12/07 22:10:34 wolti Exp $
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbproto.h"
|
||||
#include "mbconfig.h"
|
||||
|
||||
#if MB_FUNC_OTHER_REP_SLAVEID_ENABLED > 0
|
||||
|
||||
/* ----------------------- Static variables ---------------------------------*/
|
||||
static UCHAR ucMBSlaveID[MB_FUNC_OTHER_REP_SLAVEID_BUF];
|
||||
static USHORT usMBSlaveIDLen;
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
|
||||
eMBErrorCode
|
||||
eMBSetSlaveID( UCHAR ucSlaveID, BOOL xIsRunning,
|
||||
UCHAR const *pucAdditional, USHORT usAdditionalLen )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
|
||||
/* the first byte and second byte in the buffer is reserved for
|
||||
* the parameter ucSlaveID and the running flag. The rest of
|
||||
* the buffer is available for additional data. */
|
||||
if( usAdditionalLen + 2 < MB_FUNC_OTHER_REP_SLAVEID_BUF )
|
||||
{
|
||||
usMBSlaveIDLen = 0;
|
||||
ucMBSlaveID[usMBSlaveIDLen++] = ucSlaveID;
|
||||
ucMBSlaveID[usMBSlaveIDLen++] = ( UCHAR )( xIsRunning ? 0xFF : 0x00 );
|
||||
if( usAdditionalLen > 0 )
|
||||
{
|
||||
memcpy( &ucMBSlaveID[usMBSlaveIDLen], pucAdditional,
|
||||
( size_t )usAdditionalLen );
|
||||
usMBSlaveIDLen += usAdditionalLen;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_ENORES;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBException
|
||||
eMBFuncReportSlaveID( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
memcpy( &pucFrame[MB_PDU_DATA_OFF], &ucMBSlaveID[0], ( size_t )usMBSlaveIDLen );
|
||||
*usLen = ( USHORT )( MB_PDU_DATA_OFF + usMBSlaveIDLen );
|
||||
return MB_EX_NONE;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,141 @@
|
||||
/*
|
||||
* 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: mbutils.c,v 1.6 2007/02/18 23:49:07 wolti Exp $
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbproto.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define BITS_UCHAR 8U
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
void
|
||||
xMBUtilSetBits( UCHAR * ucByteBuf, USHORT usBitOffset, UCHAR ucNBits,
|
||||
UCHAR ucValue )
|
||||
{
|
||||
USHORT usWordBuf;
|
||||
USHORT usMask;
|
||||
USHORT usByteOffset;
|
||||
USHORT usNPreBits;
|
||||
USHORT usValue = ucValue;
|
||||
|
||||
assert( ucNBits <= 8 );
|
||||
assert( ( size_t )BITS_UCHAR == sizeof( UCHAR ) * 8 );
|
||||
|
||||
/* Calculate byte offset for first byte containing the bit values starting
|
||||
* at usBitOffset. */
|
||||
usByteOffset = ( USHORT )( ( usBitOffset ) / BITS_UCHAR );
|
||||
|
||||
/* How many bits precede our bits to set. */
|
||||
usNPreBits = ( USHORT )( usBitOffset - usByteOffset * BITS_UCHAR );
|
||||
|
||||
/* Move bit field into position over bits to set */
|
||||
usValue <<= usNPreBits;
|
||||
|
||||
/* Prepare a mask for setting the new bits. */
|
||||
usMask = ( USHORT )( ( 1 << ( USHORT ) ucNBits ) - 1 );
|
||||
usMask <<= usBitOffset - usByteOffset * BITS_UCHAR;
|
||||
|
||||
/* copy bits into temporary storage. */
|
||||
usWordBuf = ucByteBuf[usByteOffset];
|
||||
usWordBuf |= ucByteBuf[usByteOffset + 1] << BITS_UCHAR;
|
||||
|
||||
/* Zero out bit field bits and then or value bits into them. */
|
||||
usWordBuf = ( USHORT )( ( usWordBuf & ( ~usMask ) ) | usValue );
|
||||
|
||||
/* move bits back into storage */
|
||||
ucByteBuf[usByteOffset] = ( UCHAR )( usWordBuf & 0xFF );
|
||||
ucByteBuf[usByteOffset + 1] = ( UCHAR )( usWordBuf >> BITS_UCHAR );
|
||||
}
|
||||
|
||||
UCHAR
|
||||
xMBUtilGetBits( UCHAR * ucByteBuf, USHORT usBitOffset, UCHAR ucNBits )
|
||||
{
|
||||
USHORT usWordBuf;
|
||||
USHORT usMask;
|
||||
USHORT usByteOffset;
|
||||
USHORT usNPreBits;
|
||||
|
||||
/* Calculate byte offset for first byte containing the bit values starting
|
||||
* at usBitOffset. */
|
||||
usByteOffset = ( USHORT )( ( usBitOffset ) / BITS_UCHAR );
|
||||
|
||||
/* How many bits precede our bits to set. */
|
||||
usNPreBits = ( USHORT )( usBitOffset - usByteOffset * BITS_UCHAR );
|
||||
|
||||
/* Prepare a mask for setting the new bits. */
|
||||
usMask = ( USHORT )( ( 1 << ( USHORT ) ucNBits ) - 1 );
|
||||
|
||||
/* copy bits into temporary storage. */
|
||||
usWordBuf = ucByteBuf[usByteOffset];
|
||||
usWordBuf |= ucByteBuf[usByteOffset + 1] << BITS_UCHAR;
|
||||
|
||||
/* throw away unneeded bits. */
|
||||
usWordBuf >>= usNPreBits;
|
||||
|
||||
/* mask away bits above the requested bitfield. */
|
||||
usWordBuf &= usMask;
|
||||
|
||||
return ( UCHAR ) usWordBuf;
|
||||
}
|
||||
|
||||
eMBException
|
||||
prveMBError2Exception( eMBErrorCode eErrorCode )
|
||||
{
|
||||
eMBException eStatus;
|
||||
|
||||
switch ( eErrorCode )
|
||||
{
|
||||
case MB_ENOERR:
|
||||
eStatus = MB_EX_NONE;
|
||||
break;
|
||||
|
||||
case MB_ENOREG:
|
||||
eStatus = MB_EX_ILLEGAL_DATA_ADDRESS;
|
||||
break;
|
||||
|
||||
case MB_ETIMEDOUT:
|
||||
eStatus = MB_EX_SLAVE_BUSY;
|
||||
break;
|
||||
|
||||
default:
|
||||
eStatus = MB_EX_SLAVE_DEVICE_FAILURE;
|
||||
break;
|
||||
}
|
||||
|
||||
return eStatus;
|
||||
}
|
||||
@@ -0,0 +1,412 @@
|
||||
/*
|
||||
* 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: mb.c,v 1.28 2010/06/06 13:54:40 wolti Exp $
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbconfig.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbproto.h"
|
||||
#include "mbfunc.h"
|
||||
|
||||
#include "mbport.h"
|
||||
#if MB_RTU_ENABLED == 1
|
||||
#include "mbrtu.h"
|
||||
#endif
|
||||
#if MB_ASCII_ENABLED == 1
|
||||
#include "mbascii.h"
|
||||
#endif
|
||||
#if MB_TCP_ENABLED == 1
|
||||
#include "mbtcp.h"
|
||||
#endif
|
||||
|
||||
#ifndef MB_PORT_HAS_CLOSE
|
||||
#define MB_PORT_HAS_CLOSE 0
|
||||
#endif
|
||||
|
||||
/* ----------------------- Static variables ---------------------------------*/
|
||||
|
||||
static UCHAR ucMBAddress;
|
||||
static eMBMode eMBCurrentMode;
|
||||
|
||||
static enum
|
||||
{
|
||||
STATE_ENABLED,
|
||||
STATE_DISABLED,
|
||||
STATE_NOT_INITIALIZED
|
||||
} eMBState = STATE_NOT_INITIALIZED;
|
||||
|
||||
/* Functions pointer which are initialized in eMBInit( ). Depending on the
|
||||
* mode (RTU or ASCII) the are set to the correct implementations.
|
||||
*/
|
||||
static peMBFrameSend peMBFrameSendCur;
|
||||
static pvMBFrameStart pvMBFrameStartCur;
|
||||
static pvMBFrameStop pvMBFrameStopCur;
|
||||
static peMBFrameReceive peMBFrameReceiveCur;
|
||||
static pvMBFrameClose pvMBFrameCloseCur;
|
||||
|
||||
/* Callback functions required by the porting layer. They are called when
|
||||
* an external event has happend which includes a timeout or the reception
|
||||
* or transmission of a character.
|
||||
*/
|
||||
BOOL( *pxMBFrameCBByteReceived ) ( void );
|
||||
BOOL( *pxMBFrameCBTransmitterEmpty ) ( void );
|
||||
BOOL( *pxMBPortCBTimerExpired ) ( void );
|
||||
|
||||
BOOL( *pxMBFrameCBReceiveFSMCur ) ( void );
|
||||
BOOL( *pxMBFrameCBTransmitFSMCur ) ( void );
|
||||
|
||||
/* An array of Modbus functions handlers which associates Modbus function
|
||||
* codes with implementing functions.
|
||||
*/
|
||||
static xMBFunctionHandler xFuncHandlers[MB_FUNC_HANDLERS_MAX] = {
|
||||
#if MB_FUNC_OTHER_REP_SLAVEID_ENABLED > 0
|
||||
{MB_FUNC_OTHER_REPORT_SLAVEID, eMBFuncReportSlaveID},
|
||||
#endif
|
||||
#if MB_FUNC_READ_INPUT_ENABLED > 0
|
||||
{MB_FUNC_READ_INPUT_REGISTER, eMBFuncReadInputRegister},
|
||||
#endif
|
||||
#if MB_FUNC_READ_HOLDING_ENABLED > 0
|
||||
{MB_FUNC_READ_HOLDING_REGISTER, eMBFuncReadHoldingRegister},
|
||||
#endif
|
||||
#if MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED > 0
|
||||
{MB_FUNC_WRITE_MULTIPLE_REGISTERS, eMBFuncWriteMultipleHoldingRegister},
|
||||
#endif
|
||||
#if MB_FUNC_WRITE_HOLDING_ENABLED > 0
|
||||
{MB_FUNC_WRITE_REGISTER, eMBFuncWriteHoldingRegister},
|
||||
#endif
|
||||
#if MB_FUNC_READWRITE_HOLDING_ENABLED > 0
|
||||
{MB_FUNC_READWRITE_MULTIPLE_REGISTERS, eMBFuncReadWriteMultipleHoldingRegister},
|
||||
#endif
|
||||
#if MB_FUNC_READ_COILS_ENABLED > 0
|
||||
{MB_FUNC_READ_COILS, eMBFuncReadCoils},
|
||||
#endif
|
||||
#if MB_FUNC_WRITE_COIL_ENABLED > 0
|
||||
{MB_FUNC_WRITE_SINGLE_COIL, eMBFuncWriteCoil},
|
||||
#endif
|
||||
#if MB_FUNC_WRITE_MULTIPLE_COILS_ENABLED > 0
|
||||
{MB_FUNC_WRITE_MULTIPLE_COILS, eMBFuncWriteMultipleCoils},
|
||||
#endif
|
||||
#if MB_FUNC_READ_DISCRETE_INPUTS_ENABLED > 0
|
||||
{MB_FUNC_READ_DISCRETE_INPUTS, eMBFuncReadDiscreteInputs},
|
||||
#endif
|
||||
};
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
eMBErrorCode
|
||||
eMBInit( eMBMode eMode, UCHAR ucSlaveAddress, UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
|
||||
/* check preconditions */
|
||||
if( ( ucSlaveAddress == MB_ADDRESS_BROADCAST ) ||
|
||||
( ucSlaveAddress < MB_ADDRESS_MIN ) || ( ucSlaveAddress > MB_ADDRESS_MAX ) )
|
||||
{
|
||||
eStatus = MB_EINVAL;
|
||||
}
|
||||
else
|
||||
{
|
||||
ucMBAddress = ucSlaveAddress;
|
||||
|
||||
switch ( eMode )
|
||||
{
|
||||
#if MB_RTU_ENABLED > 0
|
||||
case MB_RTU:
|
||||
pvMBFrameStartCur = eMBRTUStart;
|
||||
pvMBFrameStopCur = eMBRTUStop;
|
||||
peMBFrameSendCur = eMBRTUSend;
|
||||
peMBFrameReceiveCur = eMBRTUReceive;
|
||||
pvMBFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBPortClose : NULL;
|
||||
pxMBFrameCBByteReceived = xMBRTUReceiveFSM;
|
||||
pxMBFrameCBTransmitterEmpty = xMBRTUTransmitFSM;
|
||||
pxMBPortCBTimerExpired = xMBRTUTimerT35Expired;
|
||||
|
||||
eStatus = eMBRTUInit( ucMBAddress, ucPort, ulBaudRate, eParity );
|
||||
break;
|
||||
#endif
|
||||
#if MB_ASCII_ENABLED > 0
|
||||
case MB_ASCII:
|
||||
pvMBFrameStartCur = eMBASCIIStart;
|
||||
pvMBFrameStopCur = eMBASCIIStop;
|
||||
peMBFrameSendCur = eMBASCIISend;
|
||||
peMBFrameReceiveCur = eMBASCIIReceive;
|
||||
pvMBFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBPortClose : NULL;
|
||||
pxMBFrameCBByteReceived = xMBASCIIReceiveFSM;
|
||||
pxMBFrameCBTransmitterEmpty = xMBASCIITransmitFSM;
|
||||
pxMBPortCBTimerExpired = xMBASCIITimerT1SExpired;
|
||||
|
||||
eStatus = eMBASCIIInit( ucMBAddress, ucPort, ulBaudRate, eParity );
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
eStatus = MB_EINVAL;
|
||||
}
|
||||
|
||||
if( eStatus == MB_ENOERR )
|
||||
{
|
||||
if( !xMBPortEventInit( ) )
|
||||
{
|
||||
/* port dependent event module initalization failed. */
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
else
|
||||
{
|
||||
eMBCurrentMode = eMode;
|
||||
eMBState = STATE_DISABLED;
|
||||
}
|
||||
}
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#if MB_TCP_ENABLED > 0
|
||||
eMBErrorCode
|
||||
eMBTCPInit( USHORT ucTCPPort )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
|
||||
if( ( eStatus = eMBTCPDoInit( ucTCPPort ) ) != MB_ENOERR )
|
||||
{
|
||||
eMBState = STATE_DISABLED;
|
||||
}
|
||||
else if( !xMBPortEventInit( ) )
|
||||
{
|
||||
/* Port dependent event module initalization failed. */
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
else
|
||||
{
|
||||
pvMBFrameStartCur = eMBTCPStart;
|
||||
pvMBFrameStopCur = eMBTCPStop;
|
||||
peMBFrameReceiveCur = eMBTCPReceive;
|
||||
peMBFrameSendCur = eMBTCPSend;
|
||||
pvMBFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBTCPPortClose : NULL;
|
||||
ucMBAddress = MB_TCP_PSEUDO_ADDRESS;
|
||||
eMBCurrentMode = MB_TCP;
|
||||
eMBState = STATE_DISABLED;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
#endif
|
||||
|
||||
eMBErrorCode
|
||||
eMBRegisterCB( UCHAR ucFunctionCode, pxMBFunctionHandler pxHandler )
|
||||
{
|
||||
int i;
|
||||
eMBErrorCode eStatus;
|
||||
|
||||
if( ( 0 < ucFunctionCode ) && ( ucFunctionCode <= 127 ) )
|
||||
{
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
if( pxHandler != NULL )
|
||||
{
|
||||
for( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ )
|
||||
{
|
||||
if( ( xFuncHandlers[i].pxHandler == NULL ) ||
|
||||
( xFuncHandlers[i].pxHandler == pxHandler ) )
|
||||
{
|
||||
xFuncHandlers[i].ucFunctionCode = ucFunctionCode;
|
||||
xFuncHandlers[i].pxHandler = pxHandler;
|
||||
break;
|
||||
}
|
||||
}
|
||||
eStatus = ( i != MB_FUNC_HANDLERS_MAX ) ? MB_ENOERR : MB_ENORES;
|
||||
}
|
||||
else
|
||||
{
|
||||
for( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ )
|
||||
{
|
||||
if( xFuncHandlers[i].ucFunctionCode == ucFunctionCode )
|
||||
{
|
||||
xFuncHandlers[i].ucFunctionCode = 0;
|
||||
xFuncHandlers[i].pxHandler = NULL;
|
||||
break;
|
||||
}
|
||||
}
|
||||
/* Remove can't fail. */
|
||||
eStatus = MB_ENOERR;
|
||||
}
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EINVAL;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
|
||||
eMBErrorCode
|
||||
eMBClose( void )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
|
||||
if( eMBState == STATE_DISABLED )
|
||||
{
|
||||
if( pvMBFrameCloseCur != NULL )
|
||||
{
|
||||
pvMBFrameCloseCur( );
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EILLSTATE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBEnable( void )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
|
||||
if( eMBState == STATE_DISABLED )
|
||||
{
|
||||
/* Activate the protocol stack. */
|
||||
pvMBFrameStartCur( );
|
||||
eMBState = STATE_ENABLED;
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EILLSTATE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBDisable( void )
|
||||
{
|
||||
eMBErrorCode eStatus;
|
||||
|
||||
if( eMBState == STATE_ENABLED )
|
||||
{
|
||||
pvMBFrameStopCur( );
|
||||
eMBState = STATE_DISABLED;
|
||||
eStatus = MB_ENOERR;
|
||||
}
|
||||
else if( eMBState == STATE_DISABLED )
|
||||
{
|
||||
eStatus = MB_ENOERR;
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EILLSTATE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBPoll( void )
|
||||
{
|
||||
static UCHAR *ucMBFrame;
|
||||
static UCHAR ucRcvAddress;
|
||||
static UCHAR ucFunctionCode;
|
||||
static USHORT usLength;
|
||||
static eMBException eException;
|
||||
|
||||
int i;
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
eMBEventType eEvent;
|
||||
|
||||
/* Check if the protocol stack is ready. */
|
||||
if( eMBState != STATE_ENABLED )
|
||||
{
|
||||
return MB_EILLSTATE;
|
||||
}
|
||||
|
||||
/* Check if there is a event available. If not return control to caller.
|
||||
* Otherwise we will handle the event. */
|
||||
if( xMBPortEventGet( &eEvent ) == TRUE )
|
||||
{
|
||||
switch ( eEvent )
|
||||
{
|
||||
case EV_READY:
|
||||
break;
|
||||
|
||||
case EV_FRAME_RECEIVED:
|
||||
eStatus = peMBFrameReceiveCur( &ucRcvAddress, &ucMBFrame, &usLength );
|
||||
if( eStatus == MB_ENOERR )
|
||||
{
|
||||
/* Check if the frame is for us. If not ignore the frame. */
|
||||
if( ( ucRcvAddress == ucMBAddress ) || ( ucRcvAddress == MB_ADDRESS_BROADCAST ) )
|
||||
{
|
||||
( void )xMBPortEventPost( EV_EXECUTE );
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
case EV_EXECUTE:
|
||||
ucFunctionCode = ucMBFrame[MB_PDU_FUNC_OFF];
|
||||
eException = MB_EX_ILLEGAL_FUNCTION;
|
||||
for( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ )
|
||||
{
|
||||
/* No more function handlers registered. Abort. */
|
||||
if( xFuncHandlers[i].ucFunctionCode == 0 )
|
||||
{
|
||||
break;
|
||||
}
|
||||
else if( xFuncHandlers[i].ucFunctionCode == ucFunctionCode )
|
||||
{
|
||||
eException = xFuncHandlers[i].pxHandler( ucMBFrame, &usLength );
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* If the request was not sent to the broadcast address we
|
||||
* return a reply. */
|
||||
if( ucRcvAddress != MB_ADDRESS_BROADCAST )
|
||||
{
|
||||
if( eException != MB_EX_NONE )
|
||||
{
|
||||
/* An exception occured. Build an error frame. */
|
||||
usLength = 0;
|
||||
ucMBFrame[usLength++] = ( UCHAR )( ucFunctionCode | MB_FUNC_ERROR );
|
||||
ucMBFrame[usLength++] = eException;
|
||||
}
|
||||
if( ( eMBCurrentMode == MB_ASCII ) && MB_ASCII_TIMEOUT_WAIT_BEFORE_SEND_MS )
|
||||
{
|
||||
vMBPortTimersDelay( MB_ASCII_TIMEOUT_WAIT_BEFORE_SEND_MS );
|
||||
}
|
||||
eStatus = peMBFrameSendCur( ucMBAddress, ucMBFrame, usLength );
|
||||
}
|
||||
break;
|
||||
|
||||
case EV_FRAME_SENT:
|
||||
break;
|
||||
}
|
||||
}
|
||||
return MB_ENOERR;
|
||||
}
|
||||
@@ -0,0 +1,98 @@
|
||||
/*
|
||||
* 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: mbcrc.c,v 1.7 2007/02/18 23:50:27 wolti Exp $
|
||||
*/
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
static const UCHAR aucCRCHi[] = {
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
|
||||
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
|
||||
0x00, 0xC1, 0x81, 0x40
|
||||
};
|
||||
|
||||
static const UCHAR aucCRCLo[] = {
|
||||
0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7,
|
||||
0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E,
|
||||
0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9,
|
||||
0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC,
|
||||
0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
|
||||
0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32,
|
||||
0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D,
|
||||
0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38,
|
||||
0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF,
|
||||
0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
|
||||
0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1,
|
||||
0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4,
|
||||
0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB,
|
||||
0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA,
|
||||
0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
|
||||
0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0,
|
||||
0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97,
|
||||
0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E,
|
||||
0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89,
|
||||
0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
|
||||
0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83,
|
||||
0x41, 0x81, 0x80, 0x40
|
||||
};
|
||||
|
||||
USHORT
|
||||
usMBCRC16( UCHAR * pucFrame, USHORT usLen )
|
||||
{
|
||||
UCHAR ucCRCHi = 0xFF;
|
||||
UCHAR ucCRCLo = 0xFF;
|
||||
int iIndex;
|
||||
|
||||
while( usLen-- )
|
||||
{
|
||||
iIndex = ucCRCLo ^ *( pucFrame++ );
|
||||
ucCRCLo = ( UCHAR )( ucCRCHi ^ aucCRCHi[iIndex] );
|
||||
ucCRCHi = aucCRCLo[iIndex];
|
||||
}
|
||||
return ( USHORT )( ucCRCHi << 8 | ucCRCLo );
|
||||
}
|
||||
@@ -0,0 +1,36 @@
|
||||
/*
|
||||
* 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: mbcrc.h,v 1.5 2006/12/07 22:10:34 wolti Exp $
|
||||
*/
|
||||
|
||||
#ifndef _MB_CRC_H
|
||||
#define _MB_CRC_H
|
||||
|
||||
USHORT usMBCRC16( UCHAR * pucFrame, USHORT usLen );
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,355 @@
|
||||
/*
|
||||
* 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: mbrtu.c,v 1.18 2007/09/12 10:15:56 wolti Exp $
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbrtu.h"
|
||||
#include "mbframe.h"
|
||||
|
||||
#include "mbcrc.h"
|
||||
#include "mbport.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_SER_PDU_SIZE_MIN 4 /*!< Minimum size of a Modbus RTU frame. */
|
||||
#define MB_SER_PDU_SIZE_MAX 256 /*!< Maximum size of a Modbus RTU frame. */
|
||||
#define MB_SER_PDU_SIZE_CRC 2 /*!< Size of CRC field in PDU. */
|
||||
#define MB_SER_PDU_ADDR_OFF 0 /*!< Offset of slave address in Ser-PDU. */
|
||||
#define MB_SER_PDU_PDU_OFF 1 /*!< Offset of Modbus-PDU in Ser-PDU. */
|
||||
|
||||
/* ----------------------- Type definitions ---------------------------------*/
|
||||
typedef enum
|
||||
{
|
||||
STATE_RX_INIT, /*!< Receiver is in initial state. */
|
||||
STATE_RX_IDLE, /*!< Receiver is in idle state. */
|
||||
STATE_RX_RCV, /*!< Frame is beeing received. */
|
||||
STATE_RX_ERROR /*!< If the frame is invalid. */
|
||||
} eMBRcvState;
|
||||
|
||||
typedef enum
|
||||
{
|
||||
STATE_TX_IDLE, /*!< Transmitter is in idle state. */
|
||||
STATE_TX_XMIT /*!< Transmitter is in transfer state. */
|
||||
} eMBSndState;
|
||||
|
||||
/* ----------------------- Static variables ---------------------------------*/
|
||||
static volatile eMBSndState eSndState;
|
||||
static volatile eMBRcvState eRcvState;
|
||||
|
||||
volatile UCHAR ucRTUBuf[MB_SER_PDU_SIZE_MAX];
|
||||
|
||||
static volatile UCHAR *pucSndBufferCur;
|
||||
static volatile USHORT usSndBufferCount;
|
||||
|
||||
static volatile USHORT usRcvBufferPos;
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
eMBErrorCode
|
||||
eMBRTUInit( UCHAR ucSlaveAddress, UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
ULONG usTimerT35_50us;
|
||||
|
||||
( void )ucSlaveAddress;
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
|
||||
/* Modbus RTU uses 8 Databits. */
|
||||
if( xMBPortSerialInit( ucPort, ulBaudRate, 8, eParity ) != TRUE )
|
||||
{
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* If baudrate > 19200 then we should use the fixed timer values
|
||||
* t35 = 1750us. Otherwise t35 must be 3.5 times the character time.
|
||||
*/
|
||||
if( ulBaudRate > 19200 )
|
||||
{
|
||||
usTimerT35_50us = 35; /* 1800us. */
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The timer reload value for a character is given by:
|
||||
*
|
||||
* ChTimeValue = Ticks_per_1s / ( Baudrate / 11 )
|
||||
* = 11 * Ticks_per_1s / Baudrate
|
||||
* = 220000 / Baudrate
|
||||
* The reload for t3.5 is 1.5 times this value and similary
|
||||
* for t3.5.
|
||||
*/
|
||||
usTimerT35_50us = ( 7UL * 220000UL ) / ( 2UL * ulBaudRate );
|
||||
}
|
||||
if( xMBPortTimersInit( ( USHORT ) usTimerT35_50us ) != TRUE )
|
||||
{
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
}
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
void
|
||||
eMBRTUStart( void )
|
||||
{
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
/* Initially the receiver is in the state STATE_RX_INIT. we start
|
||||
* the timer and if no character is received within t3.5 we change
|
||||
* to STATE_RX_IDLE. This makes sure that we delay startup of the
|
||||
* modbus protocol stack until the bus is free.
|
||||
*/
|
||||
eRcvState = STATE_RX_INIT;
|
||||
vMBPortSerialEnable( TRUE, FALSE );
|
||||
vMBPortTimersEnable( );
|
||||
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
}
|
||||
|
||||
void
|
||||
eMBRTUStop( void )
|
||||
{
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
vMBPortSerialEnable( FALSE, FALSE );
|
||||
vMBPortTimersDisable( );
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBRTUReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame, USHORT * pusLength )
|
||||
{
|
||||
BOOL xFrameReceived = FALSE;
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
assert( usRcvBufferPos < MB_SER_PDU_SIZE_MAX );
|
||||
|
||||
/* Length and CRC check */
|
||||
if( ( usRcvBufferPos >= MB_SER_PDU_SIZE_MIN )
|
||||
&& ( usMBCRC16( ( UCHAR * ) ucRTUBuf, usRcvBufferPos ) == 0 ) )
|
||||
{
|
||||
/* Save the address field. All frames are passed to the upper layed
|
||||
* and the decision if a frame is used is done there.
|
||||
*/
|
||||
*pucRcvAddress = ucRTUBuf[MB_SER_PDU_ADDR_OFF];
|
||||
|
||||
/* Total length of Modbus-PDU is Modbus-Serial-Line-PDU minus
|
||||
* size of address field and CRC checksum.
|
||||
*/
|
||||
*pusLength = ( USHORT )( usRcvBufferPos - MB_SER_PDU_PDU_OFF - MB_SER_PDU_SIZE_CRC );
|
||||
|
||||
/* Return the start of the Modbus PDU to the caller. */
|
||||
*pucFrame = ( UCHAR * ) & ucRTUBuf[MB_SER_PDU_PDU_OFF];
|
||||
xFrameReceived = TRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBRTUSend( UCHAR ucSlaveAddress, const UCHAR * pucFrame, USHORT usLength )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
USHORT usCRC16;
|
||||
|
||||
ENTER_CRITICAL_SECTION( );
|
||||
|
||||
/* Check if the receiver is still in idle state. If not we where to
|
||||
* slow with processing the received frame and the master sent another
|
||||
* frame on the network. We have to abort sending the frame.
|
||||
*/
|
||||
if( eRcvState == STATE_RX_IDLE )
|
||||
{
|
||||
/* First byte before the Modbus-PDU is the slave address. */
|
||||
pucSndBufferCur = ( UCHAR * ) pucFrame - 1;
|
||||
usSndBufferCount = 1;
|
||||
|
||||
/* Now copy the Modbus-PDU into the Modbus-Serial-Line-PDU. */
|
||||
pucSndBufferCur[MB_SER_PDU_ADDR_OFF] = ucSlaveAddress;
|
||||
usSndBufferCount += usLength;
|
||||
|
||||
/* Calculate CRC16 checksum for Modbus-Serial-Line-PDU. */
|
||||
usCRC16 = usMBCRC16( ( UCHAR * ) pucSndBufferCur, usSndBufferCount );
|
||||
ucRTUBuf[usSndBufferCount++] = ( UCHAR )( usCRC16 & 0xFF );
|
||||
ucRTUBuf[usSndBufferCount++] = ( UCHAR )( usCRC16 >> 8 );
|
||||
|
||||
/* Activate the transmitter. */
|
||||
eSndState = STATE_TX_XMIT;
|
||||
vMBPortSerialEnable( FALSE, TRUE );
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
EXIT_CRITICAL_SECTION( );
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBRTUReceiveFSM( void )
|
||||
{
|
||||
BOOL xTaskNeedSwitch = FALSE;
|
||||
UCHAR ucByte;
|
||||
|
||||
assert( eSndState == STATE_TX_IDLE );
|
||||
|
||||
/* Always read the character. */
|
||||
( void )xMBPortSerialGetByte( ( CHAR * ) & ucByte );
|
||||
|
||||
switch ( eRcvState )
|
||||
{
|
||||
/* If we have received a character in the init state we have to
|
||||
* wait until the frame is finished.
|
||||
*/
|
||||
case STATE_RX_INIT:
|
||||
vMBPortTimersEnable( );
|
||||
break;
|
||||
|
||||
/* In the error state we wait until all characters in the
|
||||
* damaged frame are transmitted.
|
||||
*/
|
||||
case STATE_RX_ERROR:
|
||||
vMBPortTimersEnable( );
|
||||
break;
|
||||
|
||||
/* In the idle state we wait for a new character. If a character
|
||||
* is received the t1.5 and t3.5 timers are started and the
|
||||
* receiver is in the state STATE_RX_RECEIVCE.
|
||||
*/
|
||||
case STATE_RX_IDLE:
|
||||
usRcvBufferPos = 0;
|
||||
ucRTUBuf[usRcvBufferPos++] = ucByte;
|
||||
eRcvState = STATE_RX_RCV;
|
||||
|
||||
/* Enable t3.5 timers. */
|
||||
vMBPortTimersEnable( );
|
||||
break;
|
||||
|
||||
/* We are currently receiving a frame. Reset the timer after
|
||||
* every character received. If more than the maximum possible
|
||||
* number of bytes in a modbus frame is received the frame is
|
||||
* ignored.
|
||||
*/
|
||||
case STATE_RX_RCV:
|
||||
if( usRcvBufferPos < MB_SER_PDU_SIZE_MAX )
|
||||
{
|
||||
ucRTUBuf[usRcvBufferPos++] = ucByte;
|
||||
}
|
||||
else
|
||||
{
|
||||
eRcvState = STATE_RX_ERROR;
|
||||
}
|
||||
vMBPortTimersEnable( );
|
||||
break;
|
||||
}
|
||||
return xTaskNeedSwitch;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBRTUTransmitFSM( void )
|
||||
{
|
||||
BOOL xNeedPoll = FALSE;
|
||||
|
||||
assert( eRcvState == STATE_RX_IDLE );
|
||||
|
||||
switch ( eSndState )
|
||||
{
|
||||
/* We should not get a transmitter event if the transmitter is in
|
||||
* idle state. */
|
||||
case STATE_TX_IDLE:
|
||||
/* enable receiver/disable transmitter. */
|
||||
vMBPortSerialEnable( TRUE, FALSE );
|
||||
break;
|
||||
|
||||
case STATE_TX_XMIT:
|
||||
/* check if we are finished. */
|
||||
if( usSndBufferCount != 0 )
|
||||
{
|
||||
xMBPortSerialPutByte( ( CHAR )*pucSndBufferCur );
|
||||
pucSndBufferCur++; /* next byte in sendbuffer. */
|
||||
usSndBufferCount--;
|
||||
}
|
||||
else
|
||||
{
|
||||
xNeedPoll = xMBPortEventPost( EV_FRAME_SENT );
|
||||
/* Disable transmitter. This prevents another transmit buffer
|
||||
* empty interrupt. */
|
||||
vMBPortSerialEnable( TRUE, FALSE );
|
||||
eSndState = STATE_TX_IDLE;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
return xNeedPoll;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBRTUTimerT35Expired( void )
|
||||
{
|
||||
BOOL xNeedPoll = FALSE;
|
||||
|
||||
switch ( eRcvState )
|
||||
{
|
||||
/* Timer t35 expired. Startup phase is finished. */
|
||||
case STATE_RX_INIT:
|
||||
xNeedPoll = xMBPortEventPost( EV_READY );
|
||||
break;
|
||||
|
||||
/* A frame was received and t35 expired. Notify the listener that
|
||||
* a new frame was received. */
|
||||
case STATE_RX_RCV:
|
||||
xNeedPoll = xMBPortEventPost( EV_FRAME_RECEIVED );
|
||||
break;
|
||||
|
||||
/* An error occured while receiving the frame. */
|
||||
case STATE_RX_ERROR:
|
||||
break;
|
||||
|
||||
/* Function called in an illegal state. */
|
||||
default:
|
||||
assert( ( eRcvState == STATE_RX_INIT ) ||
|
||||
( eRcvState == STATE_RX_RCV ) || ( eRcvState == STATE_RX_ERROR ) );
|
||||
}
|
||||
|
||||
vMBPortTimersDisable( );
|
||||
eRcvState = STATE_RX_IDLE;
|
||||
|
||||
return xNeedPoll;
|
||||
}
|
||||
@@ -0,0 +1,51 @@
|
||||
/*
|
||||
* 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: mbrtu.h,v 1.9 2006/12/07 22:10:34 wolti Exp $
|
||||
*/
|
||||
|
||||
#ifndef _MB_RTU_H
|
||||
#define _MB_RTU_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
eMBErrorCode eMBRTUInit( UCHAR slaveAddress, UCHAR ucPort, ULONG ulBaudRate,
|
||||
eMBParity eParity );
|
||||
void eMBRTUStart( void );
|
||||
void eMBRTUStop( void );
|
||||
eMBErrorCode eMBRTUReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame, USHORT * pusLength );
|
||||
eMBErrorCode eMBRTUSend( UCHAR slaveAddress, const UCHAR * pucFrame, USHORT usLength );
|
||||
BOOL xMBRTUReceiveFSM( void );
|
||||
BOOL xMBRTUTransmitFSM( void );
|
||||
BOOL xMBRTUTimerT15Expired( void );
|
||||
BOOL xMBRTUTimerT35Expired( void );
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,158 @@
|
||||
/*
|
||||
* 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: mbtcp.c,v 1.3 2006/12/07 22:10:34 wolti Exp $
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbconfig.h"
|
||||
#include "mbtcp.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbport.h"
|
||||
|
||||
#if MB_TCP_ENABLED > 0
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
|
||||
/* ----------------------- MBAP Header --------------------------------------*/
|
||||
/*
|
||||
*
|
||||
* <------------------------ MODBUS TCP/IP ADU(1) ------------------------->
|
||||
* <----------- MODBUS PDU (1') ---------------->
|
||||
* +-----------+---------------+------------------------------------------+
|
||||
* | TID | PID | Length | UID |Code | Data |
|
||||
* +-----------+---------------+------------------------------------------+
|
||||
* | | | | |
|
||||
* (2) (3) (4) (5) (6)
|
||||
*
|
||||
* (2) ... MB_TCP_TID = 0 (Transaction Identifier - 2 Byte)
|
||||
* (3) ... MB_TCP_PID = 2 (Protocol Identifier - 2 Byte)
|
||||
* (4) ... MB_TCP_LEN = 4 (Number of bytes - 2 Byte)
|
||||
* (5) ... MB_TCP_UID = 6 (Unit Identifier - 1 Byte)
|
||||
* (6) ... MB_TCP_FUNC = 7 (Modbus Function Code)
|
||||
*
|
||||
* (1) ... Modbus TCP/IP Application Data Unit
|
||||
* (1') ... Modbus Protocol Data Unit
|
||||
*/
|
||||
|
||||
#define MB_TCP_TID 0
|
||||
#define MB_TCP_PID 2
|
||||
#define MB_TCP_LEN 4
|
||||
#define MB_TCP_UID 6
|
||||
#define MB_TCP_FUNC 7
|
||||
|
||||
#define MB_TCP_PROTOCOL_ID 0 /* 0 = Modbus Protocol */
|
||||
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
eMBErrorCode
|
||||
eMBTCPDoInit( USHORT ucTCPPort )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
|
||||
if( xMBTCPPortInit( ucTCPPort ) == FALSE )
|
||||
{
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
void
|
||||
eMBTCPStart( void )
|
||||
{
|
||||
}
|
||||
|
||||
void
|
||||
eMBTCPStop( void )
|
||||
{
|
||||
/* Make sure that no more clients are connected. */
|
||||
vMBTCPPortDisable( );
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBTCPReceive( UCHAR * pucRcvAddress, UCHAR ** ppucFrame, USHORT * pusLength )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_EIO;
|
||||
UCHAR *pucMBTCPFrame;
|
||||
USHORT usLength;
|
||||
USHORT usPID;
|
||||
|
||||
if( xMBTCPPortGetRequest( &pucMBTCPFrame, &usLength ) != FALSE )
|
||||
{
|
||||
usPID = pucMBTCPFrame[MB_TCP_PID] << 8U;
|
||||
usPID |= pucMBTCPFrame[MB_TCP_PID + 1];
|
||||
|
||||
if( usPID == MB_TCP_PROTOCOL_ID )
|
||||
{
|
||||
*ppucFrame = &pucMBTCPFrame[MB_TCP_FUNC];
|
||||
*pusLength = usLength - MB_TCP_FUNC;
|
||||
eStatus = MB_ENOERR;
|
||||
|
||||
/* Modbus TCP does not use any addresses. Fake the source address such
|
||||
* that the processing part deals with this frame.
|
||||
*/
|
||||
*pucRcvAddress = MB_TCP_PSEUDO_ADDRESS;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBTCPSend( UCHAR _unused, const UCHAR * pucFrame, USHORT usLength )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
UCHAR *pucMBTCPFrame = ( UCHAR * ) pucFrame - MB_TCP_FUNC;
|
||||
USHORT usTCPLength = usLength + MB_TCP_FUNC;
|
||||
|
||||
/* The MBAP header is already initialized because the caller calls this
|
||||
* function with the buffer returned by the previous call. Therefore we
|
||||
* only have to update the length in the header. Note that the length
|
||||
* header includes the size of the Modbus PDU and the UID Byte. Therefore
|
||||
* the length is usLength plus one.
|
||||
*/
|
||||
pucMBTCPFrame[MB_TCP_LEN] = ( usLength + 1 ) >> 8U;
|
||||
pucMBTCPFrame[MB_TCP_LEN + 1] = ( usLength + 1 ) & 0xFF;
|
||||
if( xMBTCPPortSendResponse( pucMBTCPFrame, usTCPLength ) == FALSE )
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,53 @@
|
||||
/*
|
||||
* 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: mbtcp.h,v 1.2 2006/12/07 22:10:34 wolti Exp $
|
||||
*/
|
||||
|
||||
#ifndef _MB_TCP_H
|
||||
#define _MB_TCP_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_TCP_PSEUDO_ADDRESS 255
|
||||
|
||||
/* ----------------------- Function prototypes ------------------------------*/
|
||||
eMBErrorCode eMBTCPDoInit( USHORT ucTCPPort );
|
||||
void eMBTCPStart( void );
|
||||
void eMBTCPStop( void );
|
||||
eMBErrorCode eMBTCPReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame,
|
||||
USHORT * pusLength );
|
||||
eMBErrorCode eMBTCPSend( UCHAR _unused, const UCHAR * pucFrame,
|
||||
USHORT usLength );
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
Reference in New Issue
Block a user