Task function signature in FreeRTOS - Mini Project: Build & Apply

Understanding Task Function Signature in FreeRTOS

📖 Scenario: You are working on a small embedded system project using FreeRTOS. To run tasks properly, you need to write task functions with the correct signature so the operating system can manage them.

🎯 Goal: Learn how to write a FreeRTOS task function with the correct signature and create a simple task that prints a message.

📋 What You'll Learn

Create a task function with the correct FreeRTOS signature

Use the void *pvParameters parameter

Call vTaskDelete(NULL) at the end of the task

Print a message inside the task function

💡 Why This Matters

🌍 Real World

Embedded systems often use FreeRTOS to manage multiple tasks like sensor reading, communication, and control. Writing task functions correctly is essential for system stability.

💼 Career

Understanding FreeRTOS task function signatures is important for embedded software engineers working on real-time applications in industries like automotive, robotics, and IoT.

1

Create a FreeRTOS task function skeleton

Write a function called vTaskFunction that takes a single parameter void *pvParameters and returns void. Inside the function, add an empty infinite loop for(;;).

FreeRTOS

void vTaskFunction(void *pvParameters) {
    // Your code here
}

Need a hint?

Remember, FreeRTOS task functions always have the signature void functionName(void *pvParameters) and usually run an infinite loop.

2

Add a print statement inside the task loop

Inside the infinite loop of vTaskFunction, add a call to printf that prints the exact message "Task is running\n".

FreeRTOS

void vTaskFunction(void *pvParameters) {
    for(;;) {
        // Add printf statement here
    }
}

Need a hint?

Use printf inside the loop to show the task is running.

3

Add task deletion to end the task properly

After the infinite loop in vTaskFunction, add a call to vTaskDelete(NULL) to delete the current task when it finishes.

FreeRTOS

void vTaskFunction(void *pvParameters) {
    for(;;) {
        printf("Task is running\n");
    }
    // Add vTaskDelete(NULL) here
}

Need a hint?

Use vTaskDelete(NULL) to delete the current task safely.

4

Print a message to confirm task function is defined

Write a main function that calls printf with the exact message "Task function signature ready" to confirm your task function is defined correctly.

FreeRTOS

void vTaskFunction(void *pvParameters) {
    for(;;) {
        printf("Task is running\n");
    }
    vTaskDelete(NULL);
}

int main(void) {
    // Your code here
}

Need a hint?

Use printf in main to print the confirmation message.