mirror of
https://github.com/armink/FreeModbus_Slave-Master-RTT-STM32.git
synced 2025-01-26 16:37:10 +08:00
ff438e63fc
2、【更新】IAR及Keil工程配置适应新的代码文件结构； 3、【修改】所有Slaver字段为Slave Signed-off-by: armink <armink.ztl@gmail.com>
368 lines
12 KiB
C
368 lines
12 KiB
C
/*
|
||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||
* Copyright (c) 2013 China Beijing Armink <armink.ztl@gmail.com>
|
||
* 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_m.c,v 1.60 2013/08/17 11:42:56 Armink Add Master Functions , $
|
||
*/
|
||
|
||
/* ----------------------- 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"
|
||
|
||
#if MB_MASTER_RTU_ENABLED > 0
|
||
/* ----------------------- 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_M_RX_INIT, /*!< Receiver is in initial state. */
|
||
STATE_M_RX_IDLE, /*!< Receiver is in idle state. */
|
||
STATE_M_RX_RCV, /*!< Frame is beeing received. */
|
||
STATE_M_RX_ERROR /*!< If the frame is invalid. */
|
||
} eMBMasterRcvState;
|
||
|
||
typedef enum
|
||
{
|
||
STATE_M_TX_IDLE, /*!< Transmitter is in idle state. */
|
||
STATE_M_TX_XMIT, /*!< Transmitter is in transfer state. */
|
||
} eMBMasterSndState;
|
||
|
||
/* ----------------------- Static variables ---------------------------------*/
|
||
static volatile eMBMasterSndState eSndState;
|
||
static volatile eMBMasterRcvState eRcvState;
|
||
|
||
volatile UCHAR ucMasterRTUBuf[MB_SER_PDU_SIZE_MAX];
|
||
|
||
static volatile UCHAR *pucSndBufferCur;
|
||
static volatile USHORT usSndBufferCount;
|
||
|
||
static volatile USHORT usRcvBufferPos;
|
||
|
||
/* ----------------------- Start implementation -----------------------------*/
|
||
eMBErrorCode
|
||
eMBMasterRTUInit(UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity )
|
||
{
|
||
eMBErrorCode eStatus = MB_ENOERR;
|
||
ULONG usTimerT35_50us;
|
||
|
||
ENTER_CRITICAL_SECTION( );
|
||
|
||
/* Modbus RTU uses 8 Databits. */
|
||
if( xMBMasterPortSerialInit( 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( xMBMasterPortTimersInit( ( USHORT ) usTimerT35_50us ) != TRUE )
|
||
{
|
||
eStatus = MB_EPORTERR;
|
||
}
|
||
}
|
||
EXIT_CRITICAL_SECTION( );
|
||
|
||
return eStatus;
|
||
}
|
||
|
||
void
|
||
eMBMasterRTUStart( void )
|
||
{
|
||
ENTER_CRITICAL_SECTION( );
|
||
/* Initially the receiver is in the state STATE_M_RX_INIT. we start
|
||
* the timer and if no character is received within t3.5 we change
|
||
* to STATE_M_RX_IDLE. This makes sure that we delay startup of the
|
||
* modbus protocol stack until the bus is free.
|
||
*/
|
||
eRcvState = STATE_M_RX_INIT;
|
||
vMBMasterPortSerialEnable( TRUE, FALSE );
|
||
vMBMasterPortTimersEnable( );
|
||
|
||
EXIT_CRITICAL_SECTION( );
|
||
}
|
||
|
||
void
|
||
eMBMasterRTUStop( void )
|
||
{
|
||
ENTER_CRITICAL_SECTION( );
|
||
vMBMasterPortSerialEnable( FALSE, FALSE );
|
||
vMBMasterPortTimersDisable( );
|
||
EXIT_CRITICAL_SECTION( );
|
||
}
|
||
|
||
//eMBErrorCode
|
||
//eMBMasterRTUReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame, USHORT * pusLength )
|
||
//{
|
||
// BOOL xFrameReceived = FALSE;
|
||
// eMBErrorCode eStatus = MB_ENOERR;
|
||
//
|
||
// ENTER_CRITICAL_SECTION( );
|
||
// assert_param( usRcvBufferPos < MB_SER_PDU_SIZE_MAX );
|
||
//
|
||
// /* Length and CRC check */
|
||
// if( ( usRcvBufferPos >= MB_SER_PDU_SIZE_MIN )
|
||
// && ( usMBCRC16( ( UCHAR * ) ucMasterRTUBuf, 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 = ucMasterRTUBuf[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 * ) & ucMasterRTUBuf[MB_SER_PDU_PDU_OFF];
|
||
// xFrameReceived = TRUE;
|
||
// }
|
||
// else
|
||
// {
|
||
// eStatus = MB_EIO;
|
||
// }
|
||
//
|
||
// EXIT_CRITICAL_SECTION( );
|
||
// return eStatus;
|
||
//}
|
||
//
|
||
//eMBErrorCode
|
||
//eMBMasterRTUSend( 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_M_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 );
|
||
// ucMasterRTUBuf[usSndBufferCount++] = ( UCHAR )( usCRC16 & 0xFF );
|
||
// ucMasterRTUBuf[usSndBufferCount++] = ( UCHAR )( usCRC16 >> 8 );
|
||
//
|
||
// /* Activate the transmitter. */
|
||
// eSndState = STATE_M_TX_XMIT;
|
||
// vMBMasterPortSerialEnable( FALSE, TRUE );
|
||
// }
|
||
// else
|
||
// {
|
||
// eStatus = MB_EIO;
|
||
// }
|
||
// EXIT_CRITICAL_SECTION( );
|
||
// return eStatus;
|
||
//}
|
||
//
|
||
//BOOL
|
||
//xMBMasterRTUReceiveFSM( void )
|
||
//{
|
||
// BOOL xTaskNeedSwitch = FALSE;
|
||
// UCHAR ucByte;
|
||
//
|
||
// assert_param( eSndState == STATE_TX_IDLE );
|
||
//
|
||
// /* Always read the character. */
|
||
// ( void )xMBMasterPortSerialGetByte( ( 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:
|
||
// vMBMasterPortTimersEnable( );
|
||
// break;
|
||
//
|
||
// /* In the error state we wait until all characters in the
|
||
// * damaged frame are transmitted.
|
||
// */
|
||
// case STATE_RX_ERROR:
|
||
// vMBMasterPortTimersEnable( );
|
||
// 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_M_RX_IDLE:
|
||
// usRcvBufferPos = 0;
|
||
// ucMasterRTUBuf[usRcvBufferPos++] = ucByte;
|
||
// eRcvState = STATE_M_RX_RCV;
|
||
//
|
||
// /* Enable t3.5 timers. */
|
||
// vMBMasterPortTimersEnable( );
|
||
// 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_M_RX_RCV:
|
||
// if( usRcvBufferPos < MB_SER_PDU_SIZE_MAX )
|
||
// {
|
||
// ucMasterRTUBuf[usRcvBufferPos++] = ucByte;
|
||
// }
|
||
// else
|
||
// {
|
||
// eRcvState = STATE_RX_ERROR;
|
||
// }
|
||
// vMBMasterPortTimersEnable();
|
||
// break;
|
||
// }
|
||
// return xTaskNeedSwitch;
|
||
//}
|
||
//
|
||
//BOOL
|
||
//xMBMasterRTUTransmitFSM( void )
|
||
//{
|
||
// BOOL xNeedPoll = FALSE;
|
||
//
|
||
// assert_param( eRcvState == STATE_RX_IDLE );
|
||
//
|
||
// switch ( eSndState )
|
||
// {
|
||
// /* We should not get a transmitter event if the transmitter is in
|
||
// * idle state. */
|
||
// case STATE_M_TX_IDLE:
|
||
// /* enable receiver/disable transmitter. */
|
||
// vMBMasterPortSerialEnable( TRUE, FALSE );
|
||
// break;
|
||
//
|
||
// case STATE_M_TX_XMIT:
|
||
// /* check if we are finished. */
|
||
// if( usSndBufferCount != 0 )
|
||
// {
|
||
// xMBMasterPortSerialPutByte( ( CHAR )*pucSndBufferCur );
|
||
// pucSndBufferCur++; /* next byte in sendbuffer. */
|
||
// usSndBufferCount--;
|
||
// }
|
||
// else
|
||
// {
|
||
// xNeedPoll = xMBMasterPortEventPost( EV_FRAME_SENT );
|
||
// /* Disable transmitter. This prevents another transmit buffer
|
||
// * empty interrupt. */
|
||
// vMBMasterPortSerialEnable( TRUE, FALSE );
|
||
// eSndState = STATE_M_TX_IDLE;
|
||
// }
|
||
// break;
|
||
// }
|
||
//
|
||
// return xNeedPoll;
|
||
//}
|
||
//
|
||
BOOL
|
||
xMBMasterRTUTimerT35Expired(void)
|
||
{
|
||
BOOL xNeedPoll = FALSE;
|
||
|
||
switch (eRcvState)
|
||
{
|
||
/* Timer t35 expired. Startup phase is finished. */
|
||
case STATE_M_RX_INIT:
|
||
xNeedPoll = xMBMasterPortEventPost(EV_READY);
|
||
break;
|
||
|
||
/* A frame was received and t35 expired. Notify the listener that
|
||
* a new frame was received. */
|
||
case STATE_M_RX_RCV:
|
||
xNeedPoll = xMBMasterPortEventPost(EV_FRAME_RECEIVED);
|
||
break;
|
||
|
||
/* An error occured while receiving the frame. */
|
||
case STATE_M_RX_ERROR:
|
||
break;
|
||
|
||
/* Function called in an illegal state. */
|
||
default:
|
||
assert_param(
|
||
( eRcvState == STATE_M_RX_INIT ) || ( eRcvState == STATE_M_RX_RCV ) || ( eRcvState == STATE_M_RX_ERROR ));
|
||
break;
|
||
}
|
||
|
||
vMBMasterPortTimersDisable();
|
||
eRcvState = STATE_M_RX_IDLE;
|
||
|
||
//TODO <20><><EFBFBD><EFBFBD>״̬<D7B4>ڳ<EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>״̬ת<CCAC><D7AA><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD>
|
||
|
||
switch(eSndState)
|
||
{
|
||
/* Timer t35 expired. . */
|
||
case STATE_M_TX_XMIT :
|
||
|
||
}
|
||
|
||
return xNeedPoll;
|
||
}
|
||
#endif
|
||
|