[Solved] Identify the error in this ISR-to-task notification code snippet: void ISR_Handler() { vTaskNotifyGive(taskHandle); } void TaskFunction(void *pvParameters) { ulTaskNotifyTake(pdTRUE, portMAX_DELAY);... | FreeRTOS

FreeRTOS - Task Notifications

Identify the error in this ISR-to-task notification code snippet:

void ISR_Handler() {
    vTaskNotifyGive(taskHandle);
}

void TaskFunction(void *pvParameters) {
    ulTaskNotifyTake(pdTRUE, portMAX_DELAY);
    printf("Notified\n");
}

Aprintf() cannot be used in tasks

BMissing infinite loop in TaskFunction

CIncorrect parameter in ulTaskNotifyTake()

DUsing vTaskNotifyGive() inside ISR instead of vTaskNotifyGiveFromISR()

Step-by-Step Solution

Solution:

Step 1: Check ISR notification function
vTaskNotifyGive() is not safe inside ISR; must use vTaskNotifyGiveFromISR().
Step 2: Verify task code correctness
TaskFunction can have single call; infinite loop is common but not error here.
Final Answer:
Using vTaskNotifyGive() inside ISR instead of vTaskNotifyGiveFromISR() -> Option D
Quick Check:
ISR notification function must end with FromISR [OK]

Quick Trick: Use FromISR suffix functions inside ISRs [OK]

Common Mistakes:

Calling task functions inside ISR
Ignoring FromISR suffix importance
Assuming printf() is disallowed in tasks

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Identify the error in this ISR-to-task notification code snippet:

Step 1: Check ISR notification function

Step 2: Verify task code correctness

Final Answer:

Quick Check:

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