[Solved] What is wrong with this usage of xTaskNotifyGive() and ulTaskNotifyTake()? void Task1(void *pvParameters) { ulTaskNotifyTake(pdFALSE, portMAX_DELAY);... | FreeRTOS

FreeRTOS - Task Notifications

What is wrong with this usage of xTaskNotifyGive() and ulTaskNotifyTake()?

void Task1(void *pvParameters) {
    ulTaskNotifyTake(pdFALSE, portMAX_DELAY);
}

void Task2(void *pvParameters) {
    xTaskNotifyGive(Task1Handle);
}

AulTaskNotifyTake() cannot block indefinitely.

BxTaskNotifyGive() requires a second parameter.

CulTaskNotifyTake() should use pdTRUE to clear notification count.

DTask2 should not notify Task1 directly.

Step-by-Step Solution

Solution:

Step 1: Understand ulTaskNotifyTake() clear parameter
pdTRUE clears the notification count on exit; pdFALSE does not, which can cause unexpected behavior.
Step 2: Identify correct usage
Using pdFALSE means notifications accumulate, which is usually not desired for semaphore behavior.
Final Answer:
ulTaskNotifyTake() should use pdTRUE to clear notification count. -> Option C
Quick Check:
Clear notification with pdTRUE = D [OK]

Quick Trick: Use pdTRUE in ulTaskNotifyTake() to clear notifications [OK]

Common Mistakes:

Using pdFALSE causing notification count issues
Adding extra parameters to xTaskNotifyGive()
Misunderstanding notification clearing

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What is wrong with this usage of xTaskNotifyGive() and ulTaskNotifyTake()?

Step 1: Understand ulTaskNotifyTake() clear parameter

Step 2: Identify correct usage

Final Answer:

Quick Check:

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