[Solved] Which of the following is the correct way to notify a task from an ISR in FreeRTOS? — Ans: xTaskNotifyGiveFromISR(taskHandle, &higherPriorityTaskWoken); | FreeRTOS

FreeRTOS - Interrupt Management

Which of the following is the correct way to notify a task from an ISR in FreeRTOS?

AxTaskNotifyGiveFromISR(taskHandle, &higherPriorityTaskWoken);

BxTaskNotifyGive(taskHandle);

CvTaskDelay(10);

DxQueueSend(queueHandle, &data, portMAX_DELAY);

Step-by-Step Solution

Solution:

Step 1: Identify ISR-safe notification function
Only functions ending with 'FromISR' are safe to call inside ISRs.
Step 2: Check options
xTaskNotifyGiveFromISR is designed for ISR context; others are not ISR-safe or unrelated.
Final Answer:
xTaskNotifyGiveFromISR(taskHandle, &higherPriorityTaskWoken); -> Option A
Quick Check:
ISR notification uses FromISR functions [OK]

Quick Trick: Use 'FromISR' functions inside ISRs only [OK]

Common Mistakes:

Master "Interrupt Management" in FreeRTOS

9 interactive learning modes - each teaches the same concept differently

More FreeRTOS Quizzes

Which of the following is the correct way to notify a task from an ISR in FreeRTOS?