xTaskCreate() function 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", 100, NULL, 1, NULL);

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AvTaskFunction

BTaskHandle_t

CxTaskCreate

DvTaskStartScheduler

Attempts:

3 left

💡 Hint

Common Mistakes

Using the task handle type instead of the function name.

Calling xTaskCreate instead of passing the function pointer.

The first argument to xTaskCreate() is the function that implements the task.

2fill in blank

medium

Complete the code to set the stack size of the task to 256 words.

FreeRTOS

xTaskCreate(TaskFunction, "Task2", [1], NULL, 2, NULL);

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A128

B512

C64

D256

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing bytes with words for stack size.

Using too small or too large stack size without reason.

The third argument to xTaskCreate() is the stack size in words. Here, 256 is used.

3fill in blank

hard

Fix the error in the priority argument to create a high priority task.

FreeRTOS

xTaskCreate(TaskFunction, "Task3", 200, NULL, [1], NULL);

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A0

BconfigMAX_PRIORITIES

CconfigMAX_PRIORITIES - 1

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Using configMAX_PRIORITIES directly causes error.

Using negative priority values.

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 with a handle and check if creation was successful.

FreeRTOS

TaskHandle_t [1] = NULL;
BaseType_t result = xTaskCreate(TaskFunction, "Task4", 150, NULL, 1, [2]);
if (result == pdPASS) {
    // Task created successfully
}

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AtaskHandle

BNULL

C&taskHandle

DtaskFunction

Attempts:

3 left

💡 Hint

Common Mistakes

Passing NULL instead of the address of the handle variable.

Not declaring a handle variable before use.

The task handle variable is declared as taskHandle. The address of this variable &taskHandle is passed to xTaskCreate() to receive the handle.

5fill in blank

hard

Fill all three blanks to create a task with a parameter, priority 3, and store its handle.

FreeRTOS

int param = 10;
TaskHandle_t [1] = NULL;
BaseType_t result = xTaskCreate(TaskFunction, "Task5", 120, [2], [3], &taskHandle);

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AtaskHandle

B&param

C3

Dparam

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the address of param instead of param itself.

Mixing up priority and parameter arguments.

Not storing the task handle.

The task handle variable is taskHandle. The parameter passed to the task is param. The priority is set to 3.