Stack size allocation in FreeRTOS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a task stack size of 256 words.

FreeRTOS

const uint16_t taskStackSize = [1];

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A256

B1024

C128

D512

Attempts:

3 left

💡 Hint

Common Mistakes

Using bytes instead of words for stack size

Choosing a stack size too small for the task

The stack size is set to 256 words, which is a common size for simple tasks.

2fill in blank

medium

Complete the code to create a task with the stack size defined by taskStackSize.

FreeRTOS

xTaskCreate(TaskFunction, "TaskName", [1], NULL, tskIDLE_PRIORITY, NULL);

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A128

BtaskStackSize

C512

D1024

Attempts:

3 left

💡 Hint

Common Mistakes

Hardcoding the stack size instead of using the variable

Passing stack size in bytes instead of words

The stack size parameter should use the previously defined variable taskStackSize.

3fill in blank

hard

Fix the error in the stack size definition to use the correct FreeRTOS type.

FreeRTOS

StackType_t [1][256];

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AStackBuffer

BStackSize

CTaskHandle

DtaskStack

Attempts:

3 left

💡 Hint

Common Mistakes

Using type names as variable names

Using unclear or reserved names

The stack array should be named appropriately, here taskStack is a clear and common name.

4fill in blank

hard

Fill both blanks to declare and initialize a static task stack.

FreeRTOS

static [1] [2][configMINIMAL_STACK_SIZE];

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AStackType_t

BTaskHandle_t

CtaskStack

DtaskControlBlock

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong types for stack array

Confusing stack with task handle

The stack is declared as an array of StackType_t named taskStack.

5fill in blank

hard

Fill all three blanks to create a task with static allocation using stack and control block.

FreeRTOS

xTaskCreateStatic(TaskFunction, "Task", [1], NULL, tskIDLE_PRIORITY, [2], [3]);

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AconfigMINIMAL_STACK_SIZE

BtaskStack

CtaskControlBlock

DNULL

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up stack size and stack buffer

Passing NULL instead of control block

The stack size is configMINIMAL_STACK_SIZE, the stack array is taskStack, and the control block is taskControlBlock.