fsfw/osal/FreeRTOS/FreeRTOSTaskIF.h
2021-07-06 18:17:24 +02:00

42 lines
1.4 KiB
C++

#ifndef FSFW_OSAL_FREERTOS_FREERTOSTASKIF_H_
#define FSFW_OSAL_FREERTOS_FREERTOSTASKIF_H_
#include "FreeRTOS.h"
#include "task.h"
class FreeRTOSTaskIF {
public:
virtual~ FreeRTOSTaskIF() {}
virtual TaskHandle_t getTaskHandle() = 0;
protected:
bool checkMissedDeadline(const TickType_t xLastWakeTime,
const TickType_t interval) {
/* Check whether deadline was missed while also taking overflows
* into account. Drawing this on paper with a timeline helps to understand
* it. */
TickType_t currentTickCount = xTaskGetTickCount();
TickType_t timeToWake = xLastWakeTime + interval;
// Time to wake has not overflown.
if(timeToWake > xLastWakeTime) {
/* If the current time has overflown exclusively or the current
* tick count is simply larger than the time to wake, a deadline was
* missed */
if((currentTickCount < xLastWakeTime) or
(currentTickCount > timeToWake)) {
return true;
}
}
/* Time to wake has overflown. A deadline was missed if the current time
* is larger than the time to wake */
else if((timeToWake < xLastWakeTime) and
(currentTickCount > timeToWake)) {
return true;
}
return false;
}
};
#endif /* FSFW_OSAL_FREERTOS_FREERTOSTASKIF_H_ */