94 lines
3.1 KiB
C
94 lines
3.1 KiB
C
/****************************************************************************
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* apps/modbus/nuttx/portevent.c
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*
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* FreeModbus Library: NuttX Port
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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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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include "modbus/mb.h"
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#include "modbus/mbport.h"
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#include "port.h"
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static eMBEventType eQueuedEvent;
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static bool xEventInQueue;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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bool xMBPortEventInit(void)
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{
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xEventInQueue = false;
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return true;
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}
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bool xMBPortEventPost(eMBEventType eEvent)
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{
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xEventInQueue = true;
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eQueuedEvent = eEvent;
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return true;
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}
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bool xMBPortEventGet(eMBEventType * eEvent)
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{
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bool xEventHappened = false;
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if (xEventInQueue)
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{
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*eEvent = eQueuedEvent;
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xEventInQueue = false;
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xEventHappened = true;
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}
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else
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{
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/* Poll the serial device. The serial device timeouts if no
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* characters have been received within for t3.5 during an
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* active transmission or if nothing happens within a specified
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* amount of time. Both timeouts are configured from the timer
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* init functions.
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*/
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(void)xMBPortSerialPoll();
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/* Check if any of the timers have expired. */
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vMBPortTimerPoll();
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}
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return xEventHappened;
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}
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