[Solved] In a FreeRTOS application, you have two tasks: TempSensorTask reads temperature every 50 ms,... How should you assign their priorities to ensure timely sensor readings without starving the display? | FreeRTOS

FreeRTOS - RTOS Fundamentals

In a FreeRTOS application, you have two tasks: TempSensorTask reads temperature every 50 ms, and DisplayTask updates the screen every 200 ms. How should you assign their priorities to ensure timely sensor readings without starving the display?

AAssign equal priority to both tasks.

BAssign higher priority to TempSensorTask and lower to DisplayTask.

CAssign higher priority to DisplayTask and lower to TempSensorTask.

DAssign lowest priority to both tasks and use vTaskDelay for timing.

Step-by-Step Solution

Solution:

Step 1: Understand task timing requirements
TempSensorTask must run every 50 ms (more frequent), DisplayTask every 200 ms (less frequent).
Step 2: Prioritize tasks based on timing criticality
Higher priority should be given to the more time-critical task (TempSensorTask) to ensure it runs on time.
Step 3: Avoid starving lower priority task
Since DisplayTask runs less frequently, lower priority is acceptable but it should still get CPU time when TempSensorTask is idle.
Final Answer:
Assign higher priority to TempSensorTask and lower to DisplayTask. is correct.
Quick Check:
Higher priority for more frequent task [OK]

Quick Trick: Prioritize tasks by frequency and timing needs [OK]

Common Mistakes:

Assigning equal priority causing timing issues
Prioritizing less frequent task higher
Using delays without priority consideration

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More FreeRTOS Quizzes

How should you assign their priorities to ensure timely sensor readings without starving the display?

Step 1: Understand task timing requirements

Step 2: Prioritize tasks based on timing criticality

Step 3: Avoid starving lower priority task

Final Answer:

Quick Check:

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