esp-idf/components/freemodbus/port/portevent.c
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C

/* Copyright 2018 Espressif Systems (Shanghai) PTE LTD
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* FreeModbus Libary: ESP32 Port Demo Application
* Copyright (C) 2010 Christian Walter <cwalter@embedded-solutions.at>
*
* 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
* IF 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: portevent.c,v 1.1 2010/06/06 13:07:20 wolti Exp $
*/
/* ----------------------- System includes ----------------------------------*/
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <freertos/queue.h>
/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbport.h"
#include "port.h"
#include "sdkconfig.h"
#include "port_serial_slave.h"
/* ----------------------- Variables ----------------------------------------*/
static xQueueHandle xQueueHdl;
#define MB_EVENT_QUEUE_SIZE (6)
#define MB_EVENT_QUEUE_TIMEOUT (pdMS_TO_TICKS(CONFIG_FMB_EVENT_QUEUE_TIMEOUT))
/* ----------------------- Start implementation -----------------------------*/
BOOL
xMBPortEventInit( void )
{
BOOL bStatus = FALSE;
if((xQueueHdl = xQueueCreate(MB_EVENT_QUEUE_SIZE, sizeof(eMBEventType))) != NULL)
{
vQueueAddToRegistry(xQueueHdl, "MbPortEventQueue");
bStatus = TRUE;
}
return bStatus;
}
void
vMBPortEventClose( void )
{
if(xQueueHdl != NULL)
{
vQueueDelete(xQueueHdl);
xQueueHdl = NULL;
}
}
BOOL MB_PORT_ISR_ATTR
xMBPortEventPost( eMBEventType eEvent )
{
BaseType_t xStatus, xHigherPriorityTaskWoken = pdFALSE;
assert(xQueueHdl != NULL);
if( (BOOL)xPortInIsrContext() == TRUE )
{
xStatus = xQueueSendFromISR(xQueueHdl, (const void*)&eEvent, &xHigherPriorityTaskWoken);
if ( xHigherPriorityTaskWoken )
{
portYIELD_FROM_ISR();
}
if (xStatus != pdTRUE) {
ESP_EARLY_LOGV(MB_PORT_TAG, "%s: Post message failure = %d.", __func__, xStatus);
return FALSE;
}
}
else
{
xStatus = xQueueSend(xQueueHdl, (const void*)&eEvent, MB_EVENT_QUEUE_TIMEOUT);
MB_PORT_CHECK((xStatus == pdTRUE), FALSE, "%s: Post message failure.", __func__);
}
return TRUE;
}
BOOL
xMBPortEventGet(eMBEventType * peEvent)
{
assert(xQueueHdl != NULL);
BOOL xEventHappened = FALSE;
if (xQueueReceive(xQueueHdl, peEvent, portMAX_DELAY) == pdTRUE) {
xEventHappened = TRUE;
}
return xEventHappened;
}
xQueueHandle
xMBPortEventGetHandle(void)
{
if(xQueueHdl != NULL)
{
return xQueueHdl;
}
return NULL;
}