Modbus-Slave - Forking https://os.mbed.com/users/cam/code/Modbus…

Users » danielmckinnell » Code » Modbus-Slave

Forking https://os.mbed.com/users/cam/code/Modbus/ to work for NUCLEO 64 boards

Fork of Cam's original FreeModbus port (https://os.mbed.com/users/cam/code/Modbus/)

Change: - Serial implementation to work for NUCLEO 64 boards and receive interrupts instead of timer. (see `portserial.cpp`)

Added: - Custom RTU mode. Allows for external implementation of packet receiving and sending. Sends and receives packets as whole frames (address + PDU) (i.e. this was added for a custom LoRa implementation). implement `xMBRTUCustGetPDU` and `xMBRTUCustSendResponse` (see `mbport.h`) and call `eMBRTUCustomInit( address )`. implementations need to be fully initialised as `eMBRTUCustomInit` only sets the address and nothing else.

mbrtu.cpp@0:0453a0a7e500, 2010-04-15 (annotated)

Committer:: cam
Date:: Thu Apr 15 12:10:34 2010 +0000
Revision:: 0:0453a0a7e500
Child:: 4:7621103c5a40

Who changed what in which revision?

User	Revision	Line number	New contents of line
cam	0:0453a0a7e500	1	/*
cam	0:0453a0a7e500	2	* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
cam	0:0453a0a7e500	3	* Copyright (c) 2006 Christian Walter <wolti@sil.at>
cam	0:0453a0a7e500	4	* All rights reserved.
cam	0:0453a0a7e500	5	*
cam	0:0453a0a7e500	6	* Redistribution and use in source and binary forms, with or without
cam	0:0453a0a7e500	7	* modification, are permitted provided that the following conditions
cam	0:0453a0a7e500	8	* are met:
cam	0:0453a0a7e500	9	* 1. Redistributions of source code must retain the above copyright
cam	0:0453a0a7e500	10	* notice, this list of conditions and the following disclaimer.
cam	0:0453a0a7e500	11	* 2. Redistributions in binary form must reproduce the above copyright
cam	0:0453a0a7e500	12	* notice, this list of conditions and the following disclaimer in the
cam	0:0453a0a7e500	13	* documentation and/or other materials provided with the distribution.
cam	0:0453a0a7e500	14	* 3. The name of the author may not be used to endorse or promote products
cam	0:0453a0a7e500	15	* derived from this software without specific prior written permission.
cam	0:0453a0a7e500	16	*
cam	0:0453a0a7e500	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
cam	0:0453a0a7e500	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
cam	0:0453a0a7e500	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
cam	0:0453a0a7e500	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
cam	0:0453a0a7e500	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
cam	0:0453a0a7e500	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
cam	0:0453a0a7e500	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
cam	0:0453a0a7e500	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
cam	0:0453a0a7e500	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
cam	0:0453a0a7e500	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
cam	0:0453a0a7e500	27	*
cam	0:0453a0a7e500	28	* File: $Id: mbrtu.c,v 1.18 2007/09/12 10:15:56 wolti Exp $
cam	0:0453a0a7e500	29	*/
cam	0:0453a0a7e500	30
cam	0:0453a0a7e500	31	/* ----------------------- System includes ----------------------------------*/
cam	0:0453a0a7e500	32	#include "stdlib.h"
cam	0:0453a0a7e500	33	#include "string.h"
cam	0:0453a0a7e500	34
cam	0:0453a0a7e500	35	/* ----------------------- Platform includes --------------------------------*/
cam	0:0453a0a7e500	36	#include "port.h"
cam	0:0453a0a7e500	37
cam	0:0453a0a7e500	38	/* ----------------------- Modbus includes ----------------------------------*/
cam	0:0453a0a7e500	39	#include "mb.h"
cam	0:0453a0a7e500	40	#include "mbrtu.h"
cam	0:0453a0a7e500	41	#include "mbframe.h"
cam	0:0453a0a7e500	42
cam	0:0453a0a7e500	43	#include "mbcrc.h"
cam	0:0453a0a7e500	44	#include "mbport.h"
cam	0:0453a0a7e500	45
cam	0:0453a0a7e500	46	/* ----------------------- Defines ------------------------------------------*/
cam	0:0453a0a7e500	47	#define MB_SER_PDU_SIZE_MIN 4 /!< Minimum size of a Modbus RTU frame. /
cam	0:0453a0a7e500	48	#define MB_SER_PDU_SIZE_MAX 256 /!< Maximum size of a Modbus RTU frame. /
cam	0:0453a0a7e500	49	#define MB_SER_PDU_SIZE_CRC 2 /!< Size of CRC field in PDU. /
cam	0:0453a0a7e500	50	#define MB_SER_PDU_ADDR_OFF 0 /!< Offset of slave address in Ser-PDU. /
cam	0:0453a0a7e500	51	#define MB_SER_PDU_PDU_OFF 1 /!< Offset of Modbus-PDU in Ser-PDU. /
cam	0:0453a0a7e500	52
cam	0:0453a0a7e500	53	/* ----------------------- Type definitions ---------------------------------*/
cam	0:0453a0a7e500	54	typedef enum
cam	0:0453a0a7e500	55	{
cam	0:0453a0a7e500	56	STATE_RX_INIT, /!< Receiver is in initial state. /
cam	0:0453a0a7e500	57	STATE_RX_IDLE, /!< Receiver is in idle state. /
cam	0:0453a0a7e500	58	STATE_RX_RCV, /!< Frame is beeing received. /
cam	0:0453a0a7e500	59	STATE_RX_ERROR /!< If the frame is invalid. /
cam	0:0453a0a7e500	60	} eMBRcvState;
cam	0:0453a0a7e500	61
cam	0:0453a0a7e500	62	typedef enum
cam	0:0453a0a7e500	63	{
cam	0:0453a0a7e500	64	STATE_TX_IDLE, /!< Transmitter is in idle state. /
cam	0:0453a0a7e500	65	STATE_TX_XMIT /!< Transmitter is in transfer state. /
cam	0:0453a0a7e500	66	} eMBSndState;
cam	0:0453a0a7e500	67
cam	0:0453a0a7e500	68	/* ----------------------- Static variables ---------------------------------*/
cam	0:0453a0a7e500	69	static volatile eMBSndState eSndState;
cam	0:0453a0a7e500	70	static volatile eMBRcvState eRcvState;
cam	0:0453a0a7e500	71
cam	0:0453a0a7e500	72	volatile UCHAR ucRTUBuf[MB_SER_PDU_SIZE_MAX];
cam	0:0453a0a7e500	73
cam	0:0453a0a7e500	74	static volatile UCHAR *pucSndBufferCur;
cam	0:0453a0a7e500	75	static volatile USHORT usSndBufferCount;
cam	0:0453a0a7e500	76
cam	0:0453a0a7e500	77	static volatile USHORT usRcvBufferPos;
cam	0:0453a0a7e500	78
cam	0:0453a0a7e500	79	/* ----------------------- Start implementation -----------------------------*/
cam	0:0453a0a7e500	80	eMBErrorCode
cam	0:0453a0a7e500	81	eMBRTUInit( UCHAR ucSlaveAddress, UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity )
cam	0:0453a0a7e500	82	{
cam	0:0453a0a7e500	83	eMBErrorCode eStatus = MB_ENOERR;
cam	0:0453a0a7e500	84	ULONG usTimerT35_50us;
cam	0:0453a0a7e500	85
cam	0:0453a0a7e500	86	( void )ucSlaveAddress;
cam	0:0453a0a7e500	87	ENTER_CRITICAL_SECTION( );
cam	0:0453a0a7e500	88
cam	0:0453a0a7e500	89	/* Modbus RTU uses 8 Databits. */
cam	0:0453a0a7e500	90	if( xMBPortSerialInit( ucPort, ulBaudRate, 8, eParity ) != TRUE )
cam	0:0453a0a7e500	91	{
cam	0:0453a0a7e500	92	eStatus = MB_EPORTERR;
cam	0:0453a0a7e500	93	}
cam	0:0453a0a7e500	94	else
cam	0:0453a0a7e500	95	{
cam	0:0453a0a7e500	96	/* If baudrate > 19200 then we should use the fixed timer values
cam	0:0453a0a7e500	97	* t35 = 1750us. Otherwise t35 must be 3.5 times the character time.
cam	0:0453a0a7e500	98	*/
cam	0:0453a0a7e500	99	if( ulBaudRate > 19200 )
cam	0:0453a0a7e500	100	{
cam	0:0453a0a7e500	101	usTimerT35_50us = 35; /* 1800us. */
cam	0:0453a0a7e500	102	}
cam	0:0453a0a7e500	103	else
cam	0:0453a0a7e500	104	{
cam	0:0453a0a7e500	105	/* The timer reload value for a character is given by:
cam	0:0453a0a7e500	106	*
cam	0:0453a0a7e500	107	* ChTimeValue = Ticks_per_1s / ( Baudrate / 11 )
cam	0:0453a0a7e500	108	* = 11 * Ticks_per_1s / Baudrate
cam	0:0453a0a7e500	109	* = 220000 / Baudrate
cam	0:0453a0a7e500	110	* The reload for t3.5 is 1.5 times this value and similary
cam	0:0453a0a7e500	111	* for t3.5.
cam	0:0453a0a7e500	112	*/
cam	0:0453a0a7e500	113	usTimerT35_50us = ( 7UL * 220000UL ) / ( 2UL * ulBaudRate );
cam	0:0453a0a7e500	114	}
cam	0:0453a0a7e500	115	if( xMBPortTimersInit( ( USHORT ) usTimerT35_50us ) != TRUE )
cam	0:0453a0a7e500	116	{
cam	0:0453a0a7e500	117	eStatus = MB_EPORTERR;
cam	0:0453a0a7e500	118	}
cam	0:0453a0a7e500	119	}
cam	0:0453a0a7e500	120	EXIT_CRITICAL_SECTION( );
cam	0:0453a0a7e500	121
cam	0:0453a0a7e500	122	return eStatus;
cam	0:0453a0a7e500	123	}
cam	0:0453a0a7e500	124
cam	0:0453a0a7e500	125	void
cam	0:0453a0a7e500	126	eMBRTUStart( void )
cam	0:0453a0a7e500	127	{
cam	0:0453a0a7e500	128	ENTER_CRITICAL_SECTION( );
cam	0:0453a0a7e500	129	/* Initially the receiver is in the state STATE_RX_INIT. we start
cam	0:0453a0a7e500	130	* the timer and if no character is received within t3.5 we change
cam	0:0453a0a7e500	131	* to STATE_RX_IDLE. This makes sure that we delay startup of the
cam	0:0453a0a7e500	132	* modbus protocol stack until the bus is free.
cam	0:0453a0a7e500	133	*/
cam	0:0453a0a7e500	134	eRcvState = STATE_RX_INIT;
cam	0:0453a0a7e500	135	vMBPortSerialEnable( TRUE, FALSE );
cam	0:0453a0a7e500	136	vMBPortTimersEnable( );
cam	0:0453a0a7e500	137	EXIT_CRITICAL_SECTION( );
cam	0:0453a0a7e500	138	}
cam	0:0453a0a7e500	139
cam	0:0453a0a7e500	140	void
cam	0:0453a0a7e500	141	eMBRTUStop( void )
cam	0:0453a0a7e500	142	{
cam	0:0453a0a7e500	143	ENTER_CRITICAL_SECTION( );
cam	0:0453a0a7e500	144	vMBPortSerialEnable( FALSE, FALSE );
cam	0:0453a0a7e500	145	vMBPortTimersDisable( );
cam	0:0453a0a7e500	146	EXIT_CRITICAL_SECTION( );
cam	0:0453a0a7e500	147	}
cam	0:0453a0a7e500	148
cam	0:0453a0a7e500	149	eMBErrorCode
cam	0:0453a0a7e500	150	eMBRTUReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame, USHORT * pusLength )
cam	0:0453a0a7e500	151	{
cam	0:0453a0a7e500	152	BOOL xFrameReceived = FALSE;
cam	0:0453a0a7e500	153	eMBErrorCode eStatus = MB_ENOERR;
cam	0:0453a0a7e500	154
cam	0:0453a0a7e500	155	ENTER_CRITICAL_SECTION( );
cam	0:0453a0a7e500	156	assert( usRcvBufferPos < MB_SER_PDU_SIZE_MAX );
cam	0:0453a0a7e500	157
cam	0:0453a0a7e500	158	/* Length and CRC check */
cam	0:0453a0a7e500	159	if( ( usRcvBufferPos >= MB_SER_PDU_SIZE_MIN )
cam	0:0453a0a7e500	160	&& ( usMBCRC16( ( UCHAR * ) ucRTUBuf, usRcvBufferPos ) == 0 ) )
cam	0:0453a0a7e500	161	{
cam	0:0453a0a7e500	162	/* Save the address field. All frames are passed to the upper layer
cam	0:0453a0a7e500	163	* and the decision if a frame is used is done there.
cam	0:0453a0a7e500	164	*/
cam	0:0453a0a7e500	165	*pucRcvAddress = ucRTUBuf[MB_SER_PDU_ADDR_OFF];
cam	0:0453a0a7e500	166
cam	0:0453a0a7e500	167	/* Total length of Modbus-PDU is Modbus-Serial-Line-PDU minus
cam	0:0453a0a7e500	168	* size of address field and CRC checksum.
cam	0:0453a0a7e500	169	*/
cam	0:0453a0a7e500	170	*pusLength = ( USHORT )( usRcvBufferPos - MB_SER_PDU_PDU_OFF - MB_SER_PDU_SIZE_CRC );
cam	0:0453a0a7e500	171
cam	0:0453a0a7e500	172	/* Return the start of the Modbus PDU to the caller. */
cam	0:0453a0a7e500	173	pucFrame = ( UCHAR ) & ucRTUBuf[MB_SER_PDU_PDU_OFF];
cam	0:0453a0a7e500	174	xFrameReceived = TRUE;
cam	0:0453a0a7e500	175
cam	0:0453a0a7e500	176	// Added by Cam
cam	0:0453a0a7e500	177	// Now that the poll routine knows about the received frame,
cam	0:0453a0a7e500	178	// clear the receive buffer position ready for the next frame received
cam	0:0453a0a7e500	179	usRcvBufferPos = 0;
cam	0:0453a0a7e500	180
cam	0:0453a0a7e500	181	}
cam	0:0453a0a7e500	182	else
cam	0:0453a0a7e500	183	{
cam	0:0453a0a7e500	184	eStatus = MB_EIO;
cam	0:0453a0a7e500	185	}
cam	0:0453a0a7e500	186
cam	0:0453a0a7e500	187	EXIT_CRITICAL_SECTION( );
cam	0:0453a0a7e500	188	return eStatus;
cam	0:0453a0a7e500	189	}
cam	0:0453a0a7e500	190
cam	0:0453a0a7e500	191	eMBErrorCode
cam	0:0453a0a7e500	192	eMBRTUSend( UCHAR ucSlaveAddress, const UCHAR * pucFrame, USHORT usLength )
cam	0:0453a0a7e500	193	{
cam	0:0453a0a7e500	194	eMBErrorCode eStatus = MB_ENOERR;
cam	0:0453a0a7e500	195	USHORT usCRC16;
cam	0:0453a0a7e500	196
cam	0:0453a0a7e500	197	ENTER_CRITICAL_SECTION( );
cam	0:0453a0a7e500	198
cam	0:0453a0a7e500	199	/* Check if the receiver is still in idle state. If not we where to
cam	0:0453a0a7e500	200	* slow with processing the received frame and the master sent another
cam	0:0453a0a7e500	201	* frame on the network. We have to abort sending the frame.
cam	0:0453a0a7e500	202	*/
cam	0:0453a0a7e500	203	if( eRcvState == STATE_RX_IDLE )
cam	0:0453a0a7e500	204	{
cam	0:0453a0a7e500	205	/* First byte before the Modbus-PDU is the slave address. */
cam	0:0453a0a7e500	206	pucSndBufferCur = ( UCHAR * ) pucFrame - 1;
cam	0:0453a0a7e500	207	usSndBufferCount = 1;
cam	0:0453a0a7e500	208
cam	0:0453a0a7e500	209	/* Now copy the Modbus-PDU into the Modbus-Serial-Line-PDU. */
cam	0:0453a0a7e500	210	pucSndBufferCur[MB_SER_PDU_ADDR_OFF] = ucSlaveAddress;
cam	0:0453a0a7e500	211	usSndBufferCount += usLength;
cam	0:0453a0a7e500	212
cam	0:0453a0a7e500	213	/* Calculate CRC16 checksum for Modbus-Serial-Line-PDU. */
cam	0:0453a0a7e500	214	usCRC16 = usMBCRC16( ( UCHAR * ) pucSndBufferCur, usSndBufferCount );
cam	0:0453a0a7e500	215	ucRTUBuf[usSndBufferCount++] = ( UCHAR )( usCRC16 & 0xFF );
cam	0:0453a0a7e500	216	ucRTUBuf[usSndBufferCount++] = ( UCHAR )( usCRC16 >> 8 );
cam	0:0453a0a7e500	217
cam	0:0453a0a7e500	218	/* Activate the transmitter. */
cam	0:0453a0a7e500	219	eSndState = STATE_TX_XMIT;
cam	0:0453a0a7e500	220	vMBPortSerialEnable( FALSE, TRUE );
cam	0:0453a0a7e500	221	}
cam	0:0453a0a7e500	222	else
cam	0:0453a0a7e500	223	{
cam	0:0453a0a7e500	224	eStatus = MB_EIO;
cam	0:0453a0a7e500	225	}
cam	0:0453a0a7e500	226	EXIT_CRITICAL_SECTION( );
cam	0:0453a0a7e500	227	return eStatus;
cam	0:0453a0a7e500	228	}
cam	0:0453a0a7e500	229
cam	0:0453a0a7e500	230	BOOL
cam	0:0453a0a7e500	231	xMBRTUReceiveFSM( void )
cam	0:0453a0a7e500	232	{
cam	0:0453a0a7e500	233	BOOL xTaskNeedSwitch = FALSE;
cam	0:0453a0a7e500	234	UCHAR ucByte;
cam	0:0453a0a7e500	235
cam	0:0453a0a7e500	236	assert( eSndState == STATE_TX_IDLE );
cam	0:0453a0a7e500	237
cam	0:0453a0a7e500	238	/* Always read the character. */
cam	0:0453a0a7e500	239	( void )xMBPortSerialGetByte( ( CHAR * ) & ucByte );
cam	0:0453a0a7e500	240
cam	0:0453a0a7e500	241	switch ( eRcvState )
cam	0:0453a0a7e500	242	{
cam	0:0453a0a7e500	243	/* If we have received a character in the init state we have to
cam	0:0453a0a7e500	244	* wait until the frame is finished.
cam	0:0453a0a7e500	245	*/
cam	0:0453a0a7e500	246	case STATE_RX_INIT:
cam	0:0453a0a7e500	247	vMBPortTimersEnable( );
cam	0:0453a0a7e500	248	break;
cam	0:0453a0a7e500	249
cam	0:0453a0a7e500	250	/* In the error state we wait until all characters in the
cam	0:0453a0a7e500	251	* damaged frame are transmitted.
cam	0:0453a0a7e500	252	*/
cam	0:0453a0a7e500	253	case STATE_RX_ERROR:
cam	0:0453a0a7e500	254	vMBPortTimersEnable( );
cam	0:0453a0a7e500	255	break;
cam	0:0453a0a7e500	256
cam	0:0453a0a7e500	257	/* In the idle state we wait for a new character. If a character
cam	0:0453a0a7e500	258	* is received the t1.5 and t3.5 timers are started and the
cam	0:0453a0a7e500	259	* receiver is in the state STATE_RX_RECEIVE.
cam	0:0453a0a7e500	260	*/
cam	0:0453a0a7e500	261	case STATE_RX_IDLE:
cam	0:0453a0a7e500	262	ucRTUBuf[usRcvBufferPos++] = ucByte;
cam	0:0453a0a7e500	263	eRcvState = STATE_RX_RCV;
cam	0:0453a0a7e500	264
cam	0:0453a0a7e500	265	/* Enable t3.5 timers. */
cam	0:0453a0a7e500	266	vMBPortTimersEnable( );
cam	0:0453a0a7e500	267	break;
cam	0:0453a0a7e500	268
cam	0:0453a0a7e500	269	/* We are currently receiving a frame. Reset the timer after
cam	0:0453a0a7e500	270	* every character received. If more than the maximum possible
cam	0:0453a0a7e500	271	* number of bytes in a modbus frame is received the frame is
cam	0:0453a0a7e500	272	* ignored.
cam	0:0453a0a7e500	273	*/
cam	0:0453a0a7e500	274	case STATE_RX_RCV:
cam	0:0453a0a7e500	275	if( usRcvBufferPos < MB_SER_PDU_SIZE_MAX )
cam	0:0453a0a7e500	276	{
cam	0:0453a0a7e500	277	ucRTUBuf[usRcvBufferPos++] = ucByte;
cam	0:0453a0a7e500	278	}
cam	0:0453a0a7e500	279	else
cam	0:0453a0a7e500	280	{
cam	0:0453a0a7e500	281	eRcvState = STATE_RX_ERROR;
cam	0:0453a0a7e500	282	}
cam	0:0453a0a7e500	283	vMBPortTimersEnable( );
cam	0:0453a0a7e500	284	break;
cam	0:0453a0a7e500	285	}
cam	0:0453a0a7e500	286	return xTaskNeedSwitch;
cam	0:0453a0a7e500	287	}
cam	0:0453a0a7e500	288
cam	0:0453a0a7e500	289	BOOL
cam	0:0453a0a7e500	290	xMBRTUTransmitFSM( void )
cam	0:0453a0a7e500	291	{
cam	0:0453a0a7e500	292	BOOL xNeedPoll = FALSE;
cam	0:0453a0a7e500	293
cam	0:0453a0a7e500	294	assert( eRcvState == STATE_RX_IDLE );
cam	0:0453a0a7e500	295	switch ( eSndState )
cam	0:0453a0a7e500	296	{
cam	0:0453a0a7e500	297	/* We should not get a transmitter event if the transmitter is in
cam	0:0453a0a7e500	298	* idle state. */
cam	0:0453a0a7e500	299	case STATE_TX_IDLE:
cam	0:0453a0a7e500	300	/* enable receiver/disable transmitter. */
cam	0:0453a0a7e500	301	vMBPortSerialEnable( TRUE, FALSE );
cam	0:0453a0a7e500	302	break;
cam	0:0453a0a7e500	303
cam	0:0453a0a7e500	304	case STATE_TX_XMIT:
cam	0:0453a0a7e500	305	/* check if we are finished. */
cam	0:0453a0a7e500	306	if( usSndBufferCount != 0 )
cam	0:0453a0a7e500	307	{
cam	0:0453a0a7e500	308	xMBPortSerialPutByte( ( CHAR )*pucSndBufferCur );
cam	0:0453a0a7e500	309	pucSndBufferCur++; /* next byte in sendbuffer. */
cam	0:0453a0a7e500	310	usSndBufferCount--;
cam	0:0453a0a7e500	311	}
cam	0:0453a0a7e500	312	else
cam	0:0453a0a7e500	313	{
cam	0:0453a0a7e500	314	xNeedPoll = xMBPortEventPost( EV_FRAME_SENT );
cam	0:0453a0a7e500	315	/* Disable transmitter. This prevents another transmit buffer
cam	0:0453a0a7e500	316	* empty interrupt. */
cam	0:0453a0a7e500	317	vMBPortSerialEnable( TRUE, FALSE );
cam	0:0453a0a7e500	318	eSndState = STATE_TX_IDLE;
cam	0:0453a0a7e500	319	}
cam	0:0453a0a7e500	320	break;
cam	0:0453a0a7e500	321	}
cam	0:0453a0a7e500	322
cam	0:0453a0a7e500	323	return xNeedPoll;
cam	0:0453a0a7e500	324	}
cam	0:0453a0a7e500	325
cam	0:0453a0a7e500	326	BOOL
cam	0:0453a0a7e500	327	xMBRTUTimerT35Expired( void )
cam	0:0453a0a7e500	328	{
cam	0:0453a0a7e500	329	BOOL xNeedPoll = FALSE;
cam	0:0453a0a7e500	330
cam	0:0453a0a7e500	331	switch ( eRcvState )
cam	0:0453a0a7e500	332	{
cam	0:0453a0a7e500	333	/* Timer t35 expired. Startup phase is finished. */
cam	0:0453a0a7e500	334	case STATE_RX_INIT:
cam	0:0453a0a7e500	335	xNeedPoll = xMBPortEventPost( EV_READY );
cam	0:0453a0a7e500	336	break;
cam	0:0453a0a7e500	337
cam	0:0453a0a7e500	338	/* A frame was received and t35 expired. Notify the listener that
cam	0:0453a0a7e500	339	* a new frame was received. */
cam	0:0453a0a7e500	340	case STATE_RX_RCV:
cam	0:0453a0a7e500	341	xNeedPoll = xMBPortEventPost( EV_FRAME_RECEIVED );
cam	0:0453a0a7e500	342	break;
cam	0:0453a0a7e500	343
cam	0:0453a0a7e500	344	/* An error occured while receiving the frame. */
cam	0:0453a0a7e500	345	case STATE_RX_ERROR:
cam	0:0453a0a7e500	346	break;
cam	0:0453a0a7e500	347
cam	0:0453a0a7e500	348	/* Function called in an illegal state. */
cam	0:0453a0a7e500	349	default:
cam	0:0453a0a7e500	350	assert( ( eRcvState == STATE_RX_INIT ) \|\|
cam	0:0453a0a7e500	351	( eRcvState == STATE_RX_RCV ) \|\| ( eRcvState == STATE_RX_ERROR ) );
cam	0:0453a0a7e500	352	}
cam	0:0453a0a7e500	353
cam	0:0453a0a7e500	354	vMBPortTimersDisable( );
cam	0:0453a0a7e500	355	eRcvState = STATE_RX_IDLE;
cam	0:0453a0a7e500	356
cam	0:0453a0a7e500	357	return xNeedPoll;
cam	0:0453a0a7e500	358	}

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Type:	Library
Created:	03 Dec 2019
Imports:	21
Forks:	0
Commits:	5
Dependents:	0
Dependencies:	0
Followers:	2

mbrtu.cpp@0:0453a0a7e500, 2010-04-15 (annotated)

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