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added deadline missed check

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This commit is contained in:
Robin Müller 2020-06-19 14:47:01 +02:00
parent 454524d213
commit 56aaa29985
2 changed files with 77 additions and 56 deletions
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64
osal/FreeRTOS/FixedTimeslotTask.cpp
View File

@ -1,6 +1,7 @@
#include <framework/serviceinterface/ServiceInterfaceStream.h>
#include "FixedTimeslotTask.h"
#include <framework/serviceinterface/ServiceInterfaceStream.h>
uint32_t FixedTimeslotTask::deadlineMissedCount = 0;
const size_t PeriodicTaskIF::MINIMUM_STACK_SIZE = configMINIMAL_STACK_SIZE;
@ -18,16 +19,19 @@ FixedTimeslotTask::~FixedTimeslotTask() {
void FixedTimeslotTask::taskEntryPoint(void* argument) {
//The argument is re-interpreted as FixedTimeslotTask. The Task object is global, so it is found from any place.
// The argument is re-interpreted as FixedTimeslotTask. The Task object is
// global, so it is found from any place.
FixedTimeslotTask *originalTask(reinterpret_cast<FixedTimeslotTask*>(argument));
// Task should not start until explicitly requested
// in FreeRTOS, tasks start as soon as they are created if the scheduler is running
// but not if the scheduler is not running.
// to be able to accommodate both cases we check a member which is set in #startTask()
// if it is not set and we get here, the scheduler was started before #startTask() was called and we need to suspend
// if it is set, the scheduler was not running before #startTask() was called and we can continue
/* Task should not start until explicitly requested,
* but in FreeRTOS, tasks start as soon as they are created if the scheduler
* is running but not if the scheduler is not running.
* To be able to accommodate both cases we check a member which is set in
* #startTask(). If it is not set and we get here, the scheduler was started
* before #startTask() was called and we need to suspend if it is set,
* the scheduler was not running before #startTask() was called and we
* can continue */
if (!originalTask->started) {
if (not originalTask->started) {
vTaskSuspend(NULL);
}
@ -81,11 +85,12 @@ ReturnValue_t FixedTimeslotTask::checkSequence() const {
}
void FixedTimeslotTask::taskFunctionality() {
// A local iterator for the Polling Sequence Table is created to find the start time for the first entry.
std::list<FixedSequenceSlot*>::iterator it = pst.current;
// A local iterator for the Polling Sequence Table is created to find the
// start time for the first entry.
SlotListIter slotListIter = pst.current;
//The start time for the first entry is read.
uint32_t intervalMs = (*it)->pollingTimeMs;
uint32_t intervalMs = slotListIter->pollingTimeMs;
TickType_t interval = pdMS_TO_TICKS(intervalMs);
TickType_t xLastWakeTime;
@ -101,18 +106,30 @@ void FixedTimeslotTask::taskFunctionality() {
/* Enter the loop that defines the task behavior. */
for (;;) {
//The component for this slot is executed and the next one is chosen.
this->pst.executeAndAdvance();
if (pst.slotFollowsImmediately()) {
//Do nothing
} else {
// we need to wait before executing the current slot
//this gives us the time to wait:
intervalMs = this->pst.getIntervalToPreviousSlotMs();
interval = pdMS_TO_TICKS(intervalMs);
vTaskDelayUntil(&xLastWakeTime, interval);
//TODO deadline missed check
}
this->pst.executeAndAdvance();
if (not pst.slotFollowsImmediately()) {
/* If all operations are finished and the difference of the
* current time minus the last wake time is larger than the
* expected wait period, a deadline was missed. */
if(xTaskGetTickCount() - xLastWakeTime >=
pdMS_TO_TICKS(this->pst.getIntervalToPreviousSlotMs())) {
#ifdef DEBUG
sif::warning << "FixedTimeslotTask: " << pcTaskGetName(NULL) <<
" missed deadline!\n" << std::flush;
#endif
if(deadlineMissedFunc != nullptr) {
this->deadlineMissedFunc();
}
// Continue immediately, no need to wait.
break;
}
// we need to wait before executing the current slot
//this gives us the time to wait:
intervalMs = this->pst.getIntervalToPreviousSlotMs();
interval = pdMS_TO_TICKS(intervalMs);
vTaskDelayUntil(&xLastWakeTime, interval);
}
}
}
@ -120,4 +137,3 @@ ReturnValue_t FixedTimeslotTask::sleepFor(uint32_t ms) {
vTaskDelay(pdMS_TO_TICKS(ms));
return HasReturnvaluesIF::RETURN_OK;
}

69
osal/FreeRTOS/FixedTimeslotTask.h
View File

@ -1,24 +1,27 @@
#ifndef POLLINGTASK_H_
#define POLLINGTASK_H_
#ifndef FRAMEWORK_OSAL_FREERTOS_FIXEDTIMESLOTTASK_H_
#define FRAMEWORK_OSAL_FREERTOS_FIXEDTIMESLOTTASK_H_
#include <framework/devicehandlers/FixedSlotSequence.h>
#include <framework/tasks/FixedTimeslotTaskIF.h>
#include <framework/tasks/Typedef.h>
#include <FreeRTOS.h>
#include "task.h"
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
class FixedTimeslotTask: public FixedTimeslotTaskIF {
public:
/**
* @brief The standard constructor of the class.
*
* @details This is the general constructor of the class. In addition to the TaskBase parameters,
* the following variables are passed:
*
* @param (*setDeadlineMissedFunc)() The function pointer to the deadline missed function that shall be assigned.
*
* @param getPst The object id of the completely initialized polling sequence.
* Keep in Mind that you need to call before this vTaskStartScheduler()!
* A lot of task parameters are set in "FreeRTOSConfig.h".
* @param name Name of the task, lenght limited by configMAX_TASK_NAME_LEN
* @param setPriority Number of priorities specified by
* configMAX_PRIORITIES. High taskPriority_ number means high priority.
* @param setStack Stack size in words (not bytes!).
* Lower limit specified by configMINIMAL_STACK_SIZE
* @param overallPeriod Period in seconds.
* @param setDeadlineMissedFunc Callback if a deadline was missed.
* @return Pointer to the newly created task.
*/
FixedTimeslotTask(const char *name, TaskPriority setPriority,
TaskStackSize setStack, TaskPeriod overallPeriod,
@ -26,16 +29,18 @@ public:
/**
* @brief The destructor of the class.
*
* @details The destructor frees all heap memory that was allocated on thread initialization for the PST and
* the device handlers. This is done by calling the PST's destructor.
* @details
* The destructor frees all heap memory that was allocated on thread
* initialization for the PST and the device handlers. This is done by
* calling the PST's destructor.
*/
virtual ~FixedTimeslotTask(void);
ReturnValue_t startTask(void);
/**
* This static function can be used as #deadlineMissedFunc.
* It counts missedDeadlines and prints the number of missed deadlines every 10th time.
* It counts missedDeadlines and prints the number of missed deadlines
* every 10th time.
*/
static void missedDeadlineCounter();
/**
@ -51,6 +56,7 @@ public:
ReturnValue_t checkSequence() const;
ReturnValue_t sleepFor(uint32_t ms);
protected:
bool started;
TaskHandle_t handle;
@ -58,30 +64,29 @@ protected:
FixedSlotSequence pst;
/**
* @brief This attribute holds a function pointer that is executed when a deadline was missed.
*
* @details Another function may be announced to determine the actions to perform when a deadline was missed.
* Currently, only one function for missing any deadline is allowed.
* If not used, it shall be declared NULL.
* @brief This attribute holds a function pointer that is executed when
* a deadline was missed.
* @details
* Another function may be announced to determine the actions to perform
* when a deadline was missed. Currently, only one function for missing
* any deadline is allowed. If not used, it shall be declared NULL.
*/
void (*deadlineMissedFunc)(void);
/**
* @brief This is the entry point in a new polling thread.
*
* @details This method, that is the generalOSAL::checkAndRestartPeriod( this->periodId, interval ); entry point in the new thread, is here set to generate
* and link the Polling Sequence Table to the thread object and start taskFunctionality()
* on success. If operation of the task is ended for some reason,
* the destructor is called to free allocated memory.
* @brief This is the entry point for a new task.
* @details
* This method starts the task by calling taskFunctionality(), as soon as
* all requirements (task scheduler has started and startTask()
* has been called) are met.
*/
static void taskEntryPoint(void* argument);
/**
* @brief This function holds the main functionality of the thread.
*
*
* @details Holding the main functionality of the task, this method is most important.
* It links the functionalities provided by FixedSlotSequence with the OS's System Calls
* to keep the timing of the periods.
* @details
* Core function holding the main functionality of the task
* It links the functionalities provided by FixedSlotSequence with the
* OS's System Calls to keep the timing of the periods.
*/
void taskFunctionality(void);
};