[Solved] Consider the following FreeRTOS task code:void Task(void *pvParameters) { for (;;) { if (ulTaskNotifyTake(pdTRUE, 0)) {... } }What will be printed if the shutdown notification is sent to this task? | FreeRTOS

FreeRTOS - Design Patterns for RTOS

Consider the following FreeRTOS task code:

void Task(void *pvParameters) {
  for (;;) {
    if (ulTaskNotifyTake(pdTRUE, 0)) {
      printf("Shutdown signal received\n");
      break;
    }
    printf("Task running\n");
    vTaskDelay(pdMS_TO_TICKS(100));
  }
}

What will be printed if the shutdown notification is sent to this task?

ANo output will be printed

BShutdown signal received only

CTask running repeatedly without stopping

DTask running\nShutdown signal received

Step-by-Step Solution

Solution:

Step 1: Analyze loop behavior
The task prints "Task running" each iteration until ulTaskNotifyTake returns non-zero.
Step 2: On notification
When shutdown notification arrives, ulTaskNotifyTake returns true, prints "Shutdown signal received", then breaks loop.
Final Answer:
Task running\nShutdown signal received -> Option D
Quick Check:
Prints running then shutdown message [OK]

Quick Trick: Notification breaks loop after one last print [OK]

Common Mistakes:

Assuming only shutdown message prints
Ignoring the initial 'Task running' prints
Thinking no output occurs on notification

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More FreeRTOS Quizzes

Consider the following FreeRTOS task code:

Step 1: Analyze loop behavior

Step 2: On notification

Final Answer:

Quick Check:

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