esp-idf/components/freemodbus/port/portevent_m.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) 2013 Armink <armink.ztl@gmail.com>
*
* 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: $Id: portevent.c v 1.60 2013/08/13 15:07:05 Armink add Master Functions$
*/
/* ----------------------- Modbus includes ----------------------------------*/
#include "mb_m.h"
#include "mbport.h"
#include "mbconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "port.h"
#include "mbport.h"
#include "freertos/semphr.h"
#include "port_serial_master.h"
#if MB_MASTER_RTU_ENABLED || MB_MASTER_ASCII_ENABLED
/* ----------------------- Defines ------------------------------------------*/
// Event bit mask for xMBMasterPortEventGet()
#define MB_EVENT_POLL_MASK (EventBits_t)( EV_MASTER_READY | \
EV_MASTER_FRAME_RECEIVED | \
EV_MASTER_EXECUTE | \
EV_MASTER_FRAME_SENT | \
EV_MASTER_FRAME_TRANSMIT | \
EV_MASTER_ERROR_PROCESS )
// Event bit mask for eMBMasterWaitRequestFinish()
#define MB_EVENT_REQ_MASK (EventBits_t)( EV_MASTER_PROCESS_SUCCESS | \
EV_MASTER_ERROR_RESPOND_TIMEOUT | \
EV_MASTER_ERROR_RECEIVE_DATA | \
EV_MASTER_ERROR_EXECUTE_FUNCTION )
/* ----------------------- Variables ----------------------------------------*/
static SemaphoreHandle_t xSemaphorMasterHdl;
static EventGroupHandle_t xEventGroupMasterHdl;
/* ----------------------- Start implementation -----------------------------*/
BOOL
xMBMasterPortEventInit( void )
{
xEventGroupMasterHdl = xEventGroupCreate();
MB_PORT_CHECK((xEventGroupMasterHdl != NULL),
FALSE, "mb stack event group creation error.");
return TRUE;
}
BOOL MB_PORT_ISR_ATTR
xMBMasterPortEventPost( eMBMasterEventType eEvent )
{
BOOL bStatus = FALSE;
eMBMasterEventType eTempEvent = eEvent;
if( (BOOL)xPortInIsrContext() == TRUE )
{
BaseType_t xHigherPriorityTaskWoken = pdFALSE;
BaseType_t xResult = xEventGroupSetBitsFromISR( xEventGroupMasterHdl,
(EventBits_t) eTempEvent,
&xHigherPriorityTaskWoken );
// Was the message posted successfully?
if( xResult == pdPASS ) {
// If xHigherPriorityTaskWoken is now set to pdTRUE
// then a context switch should be requested.
if (xHigherPriorityTaskWoken) portYIELD_FROM_ISR();
bStatus = TRUE;
} else {
bStatus = FALSE;
}
}
else
{
// Set event bits if the function is called from task
// The return result is not checked here because
// It might be that event bit was cleared automatically as a
// task that was waiting for the bit was removed from the Blocked state.
(void) xEventGroupSetBits( xEventGroupMasterHdl, (EventBits_t)eTempEvent );
bStatus = TRUE;
}
return bStatus;
}
BOOL
xMBMasterPortEventGet( eMBMasterEventType * eEvent)
{
EventBits_t uxBits;
BOOL xEventHappened = FALSE;
uxBits = xEventGroupWaitBits( xEventGroupMasterHdl, // The event group being tested.
MB_EVENT_POLL_MASK, // The bits within the event group to wait for.
pdTRUE, // Masked bits should be cleared before returning.
pdFALSE, // Don't wait for both bits, either bit will do.
portMAX_DELAY); // Wait forever for either bit to be set.
// Check if poll event is correct
if (MB_PORT_CHECK_EVENT(uxBits, MB_EVENT_POLL_MASK)) {
*eEvent = (eMBMasterEventType)(uxBits & MB_EVENT_POLL_MASK);
xEventHappened = TRUE;
} else {
ESP_LOGE(MB_PORT_TAG,"%s: Incorrect event triggered = %d.", __func__, uxBits);
*eEvent = (eMBMasterEventType)uxBits;
xEventHappened = FALSE;
}
return xEventHappened;
}
// This function is initialize the OS resource for modbus master.
void vMBMasterOsResInit( void )
{
xSemaphorMasterHdl = xSemaphoreCreateBinary();
MB_PORT_CHECK((xSemaphorMasterHdl != NULL), ; , "%s: OS semaphore create error.", __func__);
}
/**
* This function is take Mobus Master running resource.
* Note:The resource is define by Operating System.
*
* @param lTimeOut the waiting time.
*
* @return resource take result
*/
BOOL xMBMasterRunResTake( LONG lTimeOut )
{
BaseType_t xStatus = pdTRUE;
// If waiting time is -1. It will wait forever
xStatus = xSemaphoreTake(xSemaphorMasterHdl, lTimeOut );
MB_PORT_CHECK((xStatus == pdTRUE), FALSE , "%s:Take resource failure.", __func__);
ESP_LOGV(MB_PORT_TAG,"%s:Take resource (%lu ticks).", __func__, lTimeOut);
return TRUE;
}
/**
* This function is release Mobus Master running resource.
* Note:The resource is define by Operating System.If you not use OS this function can be empty.
*/
void vMBMasterRunResRelease( void )
{
BaseType_t xStatus = pdFALSE;
xStatus = xSemaphoreGive(xSemaphorMasterHdl);
MB_PORT_CHECK((xStatus == pdTRUE), ; , "%s: resource release failure.", __func__);
}
/**
* This is modbus master respond timeout error process callback function.
* @note There functions will block modbus master poll while execute OS waiting.
*
* @param ucDestAddress destination salve address
* @param pucPDUData PDU buffer data
* @param ucPDULength PDU buffer length
*
*/
void vMBMasterErrorCBRespondTimeout(UCHAR ucDestAddress, const UCHAR* pucPDUData, USHORT ucPDULength)
{
BOOL ret = xMBMasterPortEventPost(EV_MASTER_ERROR_RESPOND_TIMEOUT);
MB_PORT_CHECK((ret == TRUE), ; , "%s: Post event 'EV_MASTER_ERROR_RESPOND_TIMEOUT' failed!", __func__);
ESP_LOGD(MB_PORT_TAG,"%s:Callback respond timeout.", __func__);
}
/**
* This is modbus master receive data error process callback function.
* @note There functions will block modbus master poll while execute OS waiting.
*
* @param ucDestAddress destination salve address
* @param pucPDUData PDU buffer data
* @param ucPDULength PDU buffer length
*/
void vMBMasterErrorCBReceiveData(UCHAR ucDestAddress, const UCHAR* pucPDUData, USHORT ucPDULength)
{
BOOL ret = xMBMasterPortEventPost(EV_MASTER_ERROR_RECEIVE_DATA);
MB_PORT_CHECK((ret == TRUE), ; , "%s: Post event 'EV_MASTER_ERROR_RECEIVE_DATA' failed!", __func__);
ESP_LOGD(MB_PORT_TAG,"%s:Callback receive data timeout failure.", __func__);
}
/**
* This is modbus master execute function error process callback function.
* @note There functions will block modbus master poll while execute OS waiting.
* So,for real-time of system.Do not execute too much waiting process.
*
* @param ucDestAddress destination salve address
* @param pucPDUData PDU buffer data
* @param ucPDULength PDU buffer length
*
*/
void vMBMasterErrorCBExecuteFunction(UCHAR ucDestAddress, const UCHAR* pucPDUData, USHORT ucPDULength)
{
BOOL ret = xMBMasterPortEventPost(EV_MASTER_ERROR_EXECUTE_FUNCTION);
MB_PORT_CHECK((ret == TRUE), ; , "%s: Post event 'EV_MASTER_ERROR_EXECUTE_FUNCTION' failed!", __func__);
ESP_LOGD(MB_PORT_TAG,"%s:Callback execute data handler failure.", __func__);
}
/**
* This is modbus master request process success callback function.
* @note There functions will block modbus master poll while execute OS waiting.
* So,for real-time of system. Do not execute too much waiting process.
*/
void vMBMasterCBRequestSuccess( void ) {
/**
* @note This code is use OS's event mechanism for modbus master protocol stack.
* If you don't use OS, you can change it.
*/
BOOL ret = xMBMasterPortEventPost(EV_MASTER_PROCESS_SUCCESS);
MB_PORT_CHECK((ret == TRUE), ; , "%s: Post event 'EV_MASTER_PROCESS_SUCCESS' failed!", __func__);
ESP_LOGD(MB_PORT_TAG,"%s: Callback request success.", __func__);
}
/**
* This function is wait for modbus master request finish and return result.
* Waiting result include request process success, request respond timeout,
* receive data error and execute function error.You can use the above callback function.
* @note If you are use OS, you can use OS's event mechanism. Otherwise you have to run
* much user custom delay for waiting.
*
* @return request error code
*/
eMBMasterReqErrCode eMBMasterWaitRequestFinish( void ) {
eMBMasterReqErrCode eErrStatus = MB_MRE_NO_ERR;
eMBMasterEventType xRecvedEvent;
EventBits_t uxBits = xEventGroupWaitBits( xEventGroupMasterHdl, // The event group being tested.
MB_EVENT_REQ_MASK, // The bits within the event group to wait for.
pdTRUE, // Masked bits should be cleared before returning.
pdFALSE, // Don't wait for both bits, either bit will do.
portMAX_DELAY ); // Wait forever for either bit to be set.
xRecvedEvent = (eMBMasterEventType)(uxBits);
if (xRecvedEvent) {
ESP_LOGD(MB_PORT_TAG,"%s: returned event = 0x%x", __func__, xRecvedEvent);
if (!(xRecvedEvent & MB_EVENT_REQ_MASK)) {
// if we wait for certain event bits but get from poll subset
ESP_LOGE(MB_PORT_TAG,"%s: incorrect event set = 0x%x", __func__, xRecvedEvent);
}
if (MB_PORT_CHECK_EVENT(xRecvedEvent, EV_MASTER_PROCESS_SUCCESS)) {
eErrStatus = MB_MRE_NO_ERR;
} else if (MB_PORT_CHECK_EVENT(xRecvedEvent, EV_MASTER_ERROR_RESPOND_TIMEOUT)) {
eErrStatus = MB_MRE_TIMEDOUT;
} else if (MB_PORT_CHECK_EVENT(xRecvedEvent, EV_MASTER_ERROR_RECEIVE_DATA)) {
eErrStatus = MB_MRE_REV_DATA;
} else if (MB_PORT_CHECK_EVENT(xRecvedEvent, EV_MASTER_ERROR_EXECUTE_FUNCTION)) {
eErrStatus = MB_MRE_EXE_FUN;
}
} else {
ESP_LOGE(MB_PORT_TAG,"%s: Incorrect event or timeout xRecvedEvent = 0x%x", __func__, uxBits);
// https://github.com/espressif/esp-idf/issues/5275
// if a no event is received, that means vMBMasterPortEventClose()
// has been closed, so event group has been deleted by FreeRTOS, which
// triggers the send of 0 value to the event group to unlock this task
// waiting on it. For this patch, handles it as a time out without assert.
eErrStatus = MB_MRE_TIMEDOUT;
}
return eErrStatus;
}
void vMBMasterPortEventClose(void)
{
vEventGroupDelete(xEventGroupMasterHdl);
vSemaphoreDelete(xSemaphorMasterHdl);
}
#endif