portevent.c

关于 modbus tcp 的一些源代码

/*
 * FreeModbus Libary: STR71x Port
 * Copyright (C) 2006 Christian Walter <[e-mail]>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * File: $Id: portevent.c,v 1.1 2006/11/02 23:14:44 wolti Exp $
 */

/* ----------------------- System includes ----------------------------------*/
#include "assert.h"

/* ----------------------- FreeRTOS -----------------------------------------*/
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"

/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbport.h"

/* ----------------------- Variables ----------------------------------------*/
static xQueueHandle xMBPortQueueHdl;

/* ----------------------- Start implementation -----------------------------*/
BOOL
xMBPortEventInit( void )
{
    xMBPortQueueHdl = xQueueCreate( 1, sizeof( eMBEventType ) );
    return xMBPortQueueHdl != NULL ? TRUE : FALSE;
}

BOOL
xMBPortEventPost( eMBEventType eEvent )
{
    portBASE_TYPE   xEventSent = pdFALSE;

    xEventSent = xQueueSendFromISR( xMBPortQueueHdl, &eEvent, xEventSent );
    return xEventSent == pdTRUE ? TRUE : FALSE;
}

BOOL
xMBPortEventGet( eMBEventType * eEvent )
{
    BOOL            xEventHappened = FALSE;

    if( xQueueReceive( xMBPortQueueHdl, eEvent, portMAX_DELAY ) == pdTRUE )
    {
        xEventHappened = TRUE;
    }
    return xEventHappened;
}