133 lines
4.8 KiB
C
133 lines
4.8 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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#include <stdint.h>
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#include <stdbool.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( uint8_t ucPort, speed_t ulBaudRate,
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uint8_t 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( int8_t * pucByte );
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bool xMBPortSerialPutByte( int8_t ucByte );
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/* ----------------------- Timers functions ---------------------------------*/
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bool xMBPortTimersInit( uint16_t 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( uint16_t 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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bool xMBTCPPortInit( uint16_t usTCPPort );
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void vMBTCPPortClose( void );
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void vMBTCPPortDisable( void );
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bool xMBTCPPortGetRequest( uint8_t **ppucMBTCPFrame, uint16_t * usTCPLength );
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bool xMBTCPPortSendResponse( const uint8_t *pucMBTCPFrame, uint16_t usTCPLength );
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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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