Stack high water mark monitoring in FreeRTOS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the stack high water mark of a task.

FreeRTOS

UBaseType_t highWaterMark = uxTaskGetStackHighWaterMark([1]);

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

ATaskHandle_t

BNULL

CxTaskHandle

Dvoid

Attempts:

3 left

💡 Hint

Common Mistakes

Passing NULL instead of the task handle.

Using the type name instead of a variable.

Passing void or unrelated values.

The function uxTaskGetStackHighWaterMark() requires the task handle as argument to return the stack high water mark.

2fill in blank

medium

Complete the code to print the stack high water mark value.

FreeRTOS

printf("Stack high water mark: %u\n", [1]);

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

AhighWaterMark

BTaskHandle_t

CuxTaskGetStackHighWaterMark(xTaskHandle)

DNULL

Attempts:

3 left

💡 Hint

Common Mistakes

Calling the function inside printf instead of using the variable.

Passing the task handle or NULL instead of the value.

Using the type name instead of a variable.

The variable highWaterMark stores the value returned by uxTaskGetStackHighWaterMark() and should be printed.

3fill in blank

hard

Fix the error in the code to correctly get the stack high water mark.

FreeRTOS

UBaseType_t highWaterMark = uxTaskGetStackHighWaterMark([1]);

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

ATaskHandle

BNULL

CNULLHandle

DxTaskHandle

Attempts:

3 left

💡 Hint

Common Mistakes

Using NULL or invalid variable names.

Confusing type names with variables.

The function requires a valid task handle variable like xTaskHandle. Passing NULL or invalid names causes errors.

4fill in blank

hard

Fill both blanks to create a function that returns the stack high water mark of a task.

FreeRTOS

UBaseType_t getStackHighWaterMark([1] task) {
    return uxTaskGetStackHighWaterMark([2]);
}

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

ATaskHandle_t

BxTaskHandle

Ctask

Dvoid

Attempts:

3 left

💡 Hint

Common Mistakes

Using void as parameter type.

Passing a variable not declared as parameter.

Mismatching parameter names.

The function parameter should be of type TaskHandle_t and the same parameter task is passed to uxTaskGetStackHighWaterMark().

5fill in blank

hard

Fill all three blanks to complete the for loop that populates the highWaterMarks array using the corresponding task handles.

FreeRTOS

const char* taskNames[] = {"Task1", "Task2", "Task3"};
UBaseType_t highWaterMarks[] = {0, 0, 0};
for (int [1] = 0; [2] < 3; [3]++) {
    highWaterMarks[i] = uxTaskGetStackHighWaterMark(xTaskHandles[i]);
}

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

Ai

Bj

Ck

Dindex

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names in loop parts.

Using undefined variables.

The loop variable i is used consistently for initialization, condition, and increment.