[Solved] Identify the error in this FreeRTOS idle hook implementation:void vApplicationIdleHook(void) { int count = 0; count++; if (count == 5) { // Do something } } | FreeRTOS

FreeRTOS - Task Scheduling

Identify the error in this FreeRTOS idle hook implementation:

void vApplicationIdleHook(void) {
    int count = 0;
    count++;
    if (count == 5) {
        // Do something
    }
}

AIdle hook function must return an int

Bcount should be declared static to retain its value

Ccount variable should be global

DIdle hook cannot use if statements

Step-by-Step Solution

Solution:

Step 1: Understand variable lifetime in idle hook
The variable count is declared inside the function, so it resets to 0 every call.
Step 2: Fix variable to retain value across calls
Declaring count as static keeps its value between calls, allowing counting.
Final Answer:
count should be declared static to retain its value -> Option B
Quick Check:
Use static for persistent variables in idle hook [OK]

Quick Trick: Use static variables to keep count across idle hook calls [OK]

Common Mistakes:

Master "Task Scheduling" in FreeRTOS

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