Priority-based scheduling in FreeRTOS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a task with priority 2.

FreeRTOS

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

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

A1

B2

C3

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 as priority which is the lowest priority.

Confusing stack size with priority.

The priority parameter sets the task priority. Here, 2 is the correct priority.

2fill in blank

medium

Complete the code to start the FreeRTOS scheduler.

FreeRTOS

int main(void) {
    // Setup code
    [1]();
    while(1) {}
}

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

AxTaskCreate

BvTaskSuspend

CvTaskDelay

DvTaskStartScheduler

Attempts:

3 left

💡 Hint

Common Mistakes

Calling xTaskCreate instead of starting the scheduler.

Forgetting to start the scheduler.

vTaskStartScheduler() starts the FreeRTOS scheduler to run tasks based on priority.

3fill in blank

hard

Fix the error in the task priority assignment.

FreeRTOS

xTaskCreate(taskFunction, "Task2", 1000, NULL, [1], NULL);

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

A-1

B5

CconfigMAX_PRIORITIES - 1

DconfigMAX_PRIORITIES

Attempts:

3 left

💡 Hint

Common Mistakes

Using a negative priority.

Using a priority equal to configMAX_PRIORITIES.

Task priority must be less than configMAX_PRIORITIES. The highest valid priority is configMAX_PRIORITIES - 1.

4fill in blank

hard

Fill both blanks to create a task and set its priority to 3.

FreeRTOS

xTaskCreate([1], "Task3", 1000, NULL, [2], NULL);

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

AtaskFunction3

BtaskFunction2

C1

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up function names.

Using wrong priority values.

The task function is taskFunction3 and the priority is 3 as requested.

5fill in blank

hard

Fill all three blanks to create a task with priority 4 and start the scheduler.

FreeRTOS

xTaskCreate([1], "Task4", 1000, NULL, [2], NULL);
[3]();

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

AtaskFunction4

B4

CvTaskStartScheduler

DtaskFunction1

Attempts:

3 left

💡 Hint

Common Mistakes

Not starting the scheduler after creating the task.

Using incorrect function names or priorities.

The task function is taskFunction4, priority is 4, and the scheduler is started with vTaskStartScheduler().