[Solved] Examine the following FreeRTOS code snippet:TickType_t lastWakeTime; for (;;) { vTaskDelayUntil(lastWakeTime, pdMS_TO_TICKS(100)); }What is the primary issue with this code? | FreeRTOS

FreeRTOS - Task Scheduling

Examine the following FreeRTOS code snippet:

TickType_t lastWakeTime;
for (;;) {
    vTaskDelayUntil(lastWakeTime, pdMS_TO_TICKS(100));
}

What is the primary issue with this code?

AlastWakeTime is not initialized before use

BThe address of lastWakeTime is not passed to vTaskDelayUntil

CpdMS_TO_TICKS is used incorrectly

DThe delay period is too short for the system tick

Step-by-Step Solution

Solution:

Step 1: Check vTaskDelayUntil() parameter requirements
The first parameter must be a pointer to a TickType_t variable.
Step 2: Analyze the code
lastWakeTime is passed by value, not by address.
Step 3: Identify the error
Passing lastWakeTime instead of &lastWakeTime causes incorrect behavior.
Final Answer:
The address of lastWakeTime is not passed to vTaskDelayUntil -> Option B
Quick Check:
Check pointer usage in function call [OK]

Quick Trick: Always pass pointer to lastWakeTime in vTaskDelayUntil [OK]

Common Mistakes:

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