Multiple tasks running concurrently in FreeRTOS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a FreeRTOS task named "Task1".

FreeRTOS

xTaskCreate([1], "Task1", 1000, NULL, 1, NULL);

Drag options to blanks, or click blank then click option'

AvTaskFunction

BvTaskStartScheduler

CvTaskDelete

DvTaskDelay

Attempts:

3 left

💡 Hint

Common Mistakes

Using scheduler or delay functions instead of the task function.

Passing NULL instead of a function.

The function vTaskFunction is the task function passed to xTaskCreate to define the task's behavior.

2fill in blank

medium

Complete the code to start the FreeRTOS scheduler.

FreeRTOS

int main() {
    // Create tasks here
    [1]();
    for(;;);
}

Drag options to blanks, or click blank then click option'

AvTaskDelete

BvTaskStartScheduler

CxTaskCreate

DvTaskDelay

Attempts:

3 left

💡 Hint

Common Mistakes

Calling task creation functions instead of starting the scheduler.

Forgetting to start the scheduler.

The function vTaskStartScheduler() starts the FreeRTOS scheduler, which begins running the created tasks.

3fill in blank

hard

Fix the error in the task delay call to delay for 1000 milliseconds.

FreeRTOS

void vTaskFunction(void *pvParameters) {
    for(;;) {
        // Do work
        vTaskDelay([1]);
    }
}

Drag options to blanks, or click blank then click option'

ApdMS_TO_TICKS(1000)

B1000

C1000 / portTICK_PERIOD_MS

D1000 * portTICK_PERIOD_MS

Attempts:

3 left

💡 Hint

Common Mistakes

Passing raw milliseconds directly to vTaskDelay.

Multiplying instead of converting properly.

The macro pdMS_TO_TICKS(1000) converts 1000 milliseconds to the correct tick count for vTaskDelay.

4fill in blank

hard

Fill both blanks to create two tasks with different priorities.

FreeRTOS

xTaskCreate(Task1Function, "Task1", 1000, NULL, [1], NULL);
xTaskCreate(Task2Function, "Task2", 1000, NULL, [2], NULL);

Drag options to blanks, or click blank then click option'

A2

B1

C3

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same priority for both tasks.

Assigning lower priority to the task that should run first.

Task1 has priority 1 and Task2 has priority 2, so Task2 runs with higher priority.

5fill in blank

hard

Fill all three blanks to create a task that deletes itself after running once.

FreeRTOS

void vOneShotTask(void *pvParameters) {
    // Task code here
    [1](pdMS_TO_TICKS(1000));
    [2](NULL);
    for(;;) {
        [3](NULL);
    }
}

Drag options to blanks, or click blank then click option'

AvTaskDelay

BvTaskDelete

CvTaskSuspend

DvTaskStartScheduler

Attempts:

3 left

💡 Hint

Common Mistakes

Calling delete without NULL parameter.

Not delaying before deleting.

Using start scheduler inside a task.

The task delays briefly, then deletes itself with vTaskDelete(NULL).