mirror of
https://github.com/0xFEEDC0DE64/arduino-esp32.git
synced 2025-11-04 08:01:38 +01:00
88 lines
3.6 KiB
C
88 lines
3.6 KiB
C
/*
|
|
* 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: mbframe.h,v 1.9 2006/12/07 22:10:34 wolti Exp $
|
|
*/
|
|
|
|
#ifndef _MB_FRAME_H
|
|
#define _MB_FRAME_H
|
|
|
|
#ifdef __cplusplus
|
|
PR_BEGIN_EXTERN_C
|
|
#endif
|
|
|
|
/*!
|
|
* Constants which defines the format of a modbus frame. The example is
|
|
* shown for a Modbus RTU/ASCII frame. Note that the Modbus PDU is not
|
|
* dependent on the underlying transport.
|
|
*
|
|
* <code>
|
|
* <------------------------ MODBUS SERIAL LINE PDU (1) ------------------->
|
|
* <----------- MODBUS PDU (1') ---------------->
|
|
* +-----------+---------------+----------------------------+-------------+
|
|
* | Address | Function Code | Data | CRC/LRC |
|
|
* +-----------+---------------+----------------------------+-------------+
|
|
* | | | |
|
|
* (2) (3/2') (3') (4)
|
|
*
|
|
* (1) ... MB_SER_PDU_SIZE_MAX = 256
|
|
* (2) ... MB_SER_PDU_ADDR_OFF = 0
|
|
* (3) ... MB_SER_PDU_PDU_OFF = 1
|
|
* (4) ... MB_SER_PDU_SIZE_CRC = 2
|
|
*
|
|
* (1') ... MB_PDU_SIZE_MAX = 253
|
|
* (2') ... MB_PDU_FUNC_OFF = 0
|
|
* (3') ... MB_PDU_DATA_OFF = 1
|
|
* </code>
|
|
*/
|
|
|
|
/* ----------------------- Defines ------------------------------------------*/
|
|
#define MB_PDU_SIZE_MAX 253 /*!< Maximum size of a PDU. */
|
|
#define MB_PDU_SIZE_MIN 1 /*!< Function Code */
|
|
#define MB_PDU_FUNC_OFF 0 /*!< Offset of function code in PDU. */
|
|
#define MB_PDU_DATA_OFF 1 /*!< Offset for response data in PDU. */
|
|
|
|
/* ----------------------- Prototypes 0-------------------------------------*/
|
|
typedef void ( *pvMBFrameStart ) ( void );
|
|
|
|
typedef void ( *pvMBFrameStop ) ( void );
|
|
|
|
typedef eMBErrorCode( *peMBFrameReceive ) ( UCHAR * pucRcvAddress,
|
|
UCHAR ** pucFrame,
|
|
USHORT * pusLength );
|
|
|
|
typedef eMBErrorCode( *peMBFrameSend ) ( UCHAR slaveAddress,
|
|
const UCHAR * pucFrame,
|
|
USHORT usLength );
|
|
|
|
typedef void( *pvMBFrameClose ) ( void );
|
|
|
|
#ifdef __cplusplus
|
|
PR_END_EXTERN_C
|
|
#endif
|
|
#endif
|