f0eb9985b9
This example adds functionality to support basic communication in RS485 networks using Modbus protocol. This example uses FreeModbus stack and regular UART driver API to communicate in RS485 half duplex mode. Added initial support of modbus controller pure C api to access device parameters over Modbus transport. Move freemodbus stack and port files into components folder Move the modbus_controller interface into components idf folder Source files updated after review. Add modbus interface documentation docs/en/api-reference/protocols/modbus.rst porttimer.c: fix bug with timer1 selected in the Kconfig Add support of cmake system (added cmake files) Closes https://github.com/espressif/esp-idf/issues/858
130 lines
4.7 KiB
C
130 lines
4.7 KiB
C
/*
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* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
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* Copyright (c) 2006 Christian Walter <wolti@sil.at>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* File: $Id: mbport.h,v 1.19 2010/06/06 13:54:40 wolti Exp $
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*/
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#ifndef _MB_PORT_H
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#define _MB_PORT_H
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#ifdef __cplusplus
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PR_BEGIN_EXTERN_C
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#endif
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/* ----------------------- Type definitions ---------------------------------*/
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typedef enum
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{
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EV_READY, /*!< Startup finished. */
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EV_FRAME_RECEIVED, /*!< Frame received. */
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EV_EXECUTE, /*!< Execute function. */
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EV_FRAME_SENT /*!< Frame sent. */
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} eMBEventType;
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/*! \ingroup modbus
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* \brief Parity used for characters in serial mode.
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*
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* The parity which should be applied to the characters sent over the serial
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* link. Please note that this values are actually passed to the porting
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* layer and therefore not all parity modes might be available.
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*/
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typedef enum
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{
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MB_PAR_NONE, /*!< No parity. */
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MB_PAR_ODD, /*!< Odd parity. */
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MB_PAR_EVEN /*!< Even parity. */
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} eMBParity;
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/* ----------------------- Supporting functions -----------------------------*/
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BOOL xMBPortEventInit( void );
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BOOL xMBPortEventPost( eMBEventType eEvent );
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BOOL xMBPortEventGet( /*@out@ */ eMBEventType * eEvent );
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/* ----------------------- Serial port functions ----------------------------*/
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BOOL xMBPortSerialInit( UCHAR ucPort, ULONG ulBaudRate,
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UCHAR ucDataBits, eMBParity eParity );
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void vMBPortClose( void );
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void xMBPortSerialClose( void );
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void vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable );
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BOOL xMBPortSerialGetByte( CHAR * pucByte );
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BOOL xMBPortSerialPutByte( CHAR ucByte );
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/* ----------------------- Timers functions ---------------------------------*/
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BOOL xMBPortTimersInit( USHORT usTimeOut50us );
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void xMBPortTimersClose( void );
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void vMBPortTimersEnable( void );
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void vMBPortTimersDisable( void );
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void vMBPortTimersDelay( USHORT usTimeOutMS );
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/* ----------------------- Callback for the protocol stack ------------------*/
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/*!
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* \brief Callback function for the porting layer when a new byte is
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* available.
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*
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* Depending upon the mode this callback function is used by the RTU or
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* ASCII transmission layers. In any case a call to xMBPortSerialGetByte()
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* must immediately return a new character.
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*
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* \return <code>TRUE</code> if a event was posted to the queue because
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* a new byte was received. The port implementation should wake up the
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* tasks which are currently blocked on the eventqueue.
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*/
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extern BOOL( *pxMBFrameCBByteReceived ) ( void );
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extern BOOL( *pxMBFrameCBTransmitterEmpty ) ( void );
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extern BOOL( *pxMBPortCBTimerExpired ) ( void );
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/* ----------------------- TCP port functions -------------------------------*/
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#if MB_TCP_ENABLED == 1
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BOOL xMBTCPPortInit( USHORT usTCPPort );
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void vMBTCPPortClose( void );
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void vMBTCPPortDisable( void );
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BOOL xMBTCPPortGetRequest( UCHAR **ppucMBTCPFrame, USHORT * usTCPLength );
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BOOL xMBTCPPortSendResponse( const UCHAR *pucMBTCPFrame, USHORT usTCPLength );
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#endif
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#ifdef __cplusplus
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PR_END_EXTERN_C
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#endif
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#endif
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