fsfw/osal/rtems/PollingTask.cpp

123 lines
3.9 KiB
C++

#include "../../devicehandlers/FixedSequenceSlot.h"
#include "../../objectmanager/SystemObjectIF.h"
#include "PollingTask.h"
#include "RtemsBasic.h"
#include "../../returnvalues/HasReturnvaluesIF.h"
#include "../../serviceinterface/ServiceInterfaceStream.h"
#include <rtems/bspIo.h>
#include <rtems/rtems/ratemon.h>
#include <rtems/rtems/status.h>
#include <rtems/rtems/tasks.h>
#include <rtems/rtems/types.h>
#include <stddef.h>
#include <sys/_stdint.h>
#include <iostream>
#include <list>
uint32_t PollingTask::deadlineMissedCount = 0;
PollingTask::PollingTask(const char *name, rtems_task_priority setPriority,
size_t setStack, uint32_t setOverallPeriod,
void (*setDeadlineMissedFunc)()) :
TaskBase(setPriority, setStack, name), periodId(0), pst(
setOverallPeriod) {
// All additional attributes are applied to the object.
this->deadlineMissedFunc = setDeadlineMissedFunc;
}
PollingTask::~PollingTask() {
}
rtems_task PollingTask::taskEntryPoint(rtems_task_argument argument) {
//The argument is re-interpreted as PollingTask.
PollingTask *originalTask(reinterpret_cast<PollingTask*>(argument));
//The task's functionality is called.
originalTask->taskFunctionality();
debug << "Polling task " << originalTask->getId()
<< " returned from taskFunctionality." << std::endl;
}
void PollingTask::missedDeadlineCounter() {
PollingTask::deadlineMissedCount++;
if (PollingTask::deadlineMissedCount % 10 == 0) {
error << "PST missed " << PollingTask::deadlineMissedCount
<< " deadlines." << std::endl;
}
}
ReturnValue_t PollingTask::startTask() {
rtems_status_code status = rtems_task_start(id, PollingTask::taskEntryPoint,
rtems_task_argument((void *) this));
if (status != RTEMS_SUCCESSFUL) {
error << "PollingTask::startTask for " << std::hex << this->getId()
<< std::dec << " failed." << std::endl;
}
switch(status){
case RTEMS_SUCCESSFUL:
//ask started successfully
return HasReturnvaluesIF::RETURN_OK;
default:
/* RTEMS_INVALID_ADDRESS - invalid task entry point
RTEMS_INVALID_ID - invalid task id
RTEMS_INCORRECT_STATE - task not in the dormant state
RTEMS_ILLEGAL_ON_REMOTE_OBJECT - cannot start remote task */
return HasReturnvaluesIF::RETURN_FAILED;
}
}
ReturnValue_t PollingTask::addSlot(object_id_t componentId,
uint32_t slotTimeMs, int8_t executionStep) {
if (objectManager->get<ExecutableObjectIF>(componentId) != nullptr) {
pst.addSlot(componentId, slotTimeMs, executionStep, this);
return HasReturnvaluesIF::RETURN_OK;
}
error << "Component " << std::hex << componentId <<
" not found, not adding it to pst" << std::endl;
return HasReturnvaluesIF::RETURN_FAILED;
}
uint32_t PollingTask::getPeriodMs() const {
return pst.getLengthMs();
}
ReturnValue_t PollingTask::checkSequence() const {
return pst.checkSequence();
}
#include <rtems/io.h>
void PollingTask::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;
//The start time for the first entry is read.
rtems_interval interval = RtemsBasic::convertMsToTicks(
(*it)->pollingTimeMs);
TaskBase::setAndStartPeriod(interval,&periodId);
//The task's "infinite" inner loop is entered.
while (1) {
if (pst.slotFollowsImmediately()) {
//Do nothing
} else {
//The interval for the next polling slot is selected.
interval = RtemsBasic::convertMsToTicks(this->pst.getIntervalToNextSlotMs());
//The period is checked and restarted with the new interval.
//If the deadline was missed, the deadlineMissedFunc is called.
rtems_status_code status = TaskBase::restartPeriod(interval,periodId);
if (status == RTEMS_TIMEOUT) {
if (this->deadlineMissedFunc != NULL) {
this->deadlineMissedFunc();
}
}
}
//The device handler for this slot is executed and the next one is chosen.
this->pst.executeAndAdvance();
}
}
ReturnValue_t PollingTask::sleepFor(uint32_t ms){
return TaskBase::sleepFor(ms);
};