modbus_client_misc.c File Reference

Helper functions for Modbus/TCP client. More...

#include "modbus/modbus_client.h"
#include "modbus/modbus_client_pdu.h"
#include "modbus/modbus_client_transport.h"
#include "modbus/modbus_client_misc.h"
#include "modbus/modbus_debug.h"
#include "debug.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   MODBUS_TRACE_LEVEL

Functions
error_t	modbusClientTransaction (ModbusClientContext *context)
	Perform Modbus transaction. More...
error_t	modbusClientCheckResp (ModbusClientContext *context)
	Check whether the received response matches the request. More...
error_t	modbusClientFormatMbapHeader (ModbusClientContext *context, size_t length)
	Format MBAP header. More...
error_t	modbusClientParseMbapHeader (ModbusClientContext *context)
	Parse MBAP header. More...
void *	modbusClientGetRequestPdu (ModbusClientContext *context)
	Retrieve request PDU. More...
void *	modbusClientGetResponsePdu (ModbusClientContext *context, size_t *length)
	Retrieve response PDU. More...
error_t	modbusClientCheckTimeout (ModbusClientContext *context)
	Determine whether a timeout error has occurred. More...

Detailed Description

Helper functions for Modbus/TCP client.

License

SPDX-License-Identifier: GPL-2.0-or-later

Copyright (C) 2010-2024 Oryx Embedded SARL. All rights reserved.

This file is part of CycloneTCP Open.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Author

Oryx Embedded SARL (www.oryx-embedded.com)

Version

2.4.4

Definition in file modbus_client_misc.c.

Macro Definition Documentation

TRACE_LEVEL

#define TRACE_LEVEL   MODBUS_TRACE_LEVEL

Definition at line 32 of file modbus_client_misc.c.

Function Documentation

modbusClientCheckResp()

error_t modbusClientCheckResp

(

ModbusClientContext *

context

)

Check whether the received response matches the request.

Parameters

[in]

context

Pointer to the Modbus/TCP client context

Returns

Error code

Definition at line 211 of file modbus_client_misc.c.

modbusClientCheckTimeout()

error_t modbusClientCheckTimeout

(

ModbusClientContext *

context

)

Determine whether a timeout error has occurred.

Parameters

[in]

context

Pointer to the Modbus/TCP client context

Returns

Error code

Definition at line 417 of file modbus_client_misc.c.

modbusClientFormatMbapHeader()

error_t modbusClientFormatMbapHeader	(	ModbusClientContext *	context,
		size_t	length
	)

Format MBAP header.

Parameters

[in]	context	Pointer to the Modbus/TCP client context
[in]	length	Length of the PDU, in bytes

Returns

Error code

Definition at line 271 of file modbus_client_misc.c.

modbusClientGetRequestPdu()

void* modbusClientGetRequestPdu

(

ModbusClientContext *

context

)

Retrieve request PDU.

Parameters

[in]

context

Pointer to the Modbus/TCP client context

Returns

Pointer to the request PDU

Definition at line 375 of file modbus_client_misc.c.

modbusClientGetResponsePdu()

void* modbusClientGetResponsePdu	(	ModbusClientContext *	context,
		size_t *	length
	)

Retrieve response PDU.

Parameters

[in]	context	Pointer to the Modbus/TCP client context
[out]	length	Length of the response PDU, in bytes

Returns

Pointer to the response PDU

Definition at line 389 of file modbus_client_misc.c.

modbusClientParseMbapHeader()

error_t modbusClientParseMbapHeader

(

ModbusClientContext *

context

)

Parse MBAP header.

Parameters

[in]

context

Pointer to the Modbus/TCP client context

Returns

Error code

Definition at line 320 of file modbus_client_misc.c.

modbusClientTransaction()

error_t modbusClientTransaction

(

ModbusClientContext *

context

)

Perform Modbus transaction.

Parameters

[in]

context

Pointer to the Modbus/TCP client context

Returns

Error code

Definition at line 52 of file modbus_client_misc.c.