vTaskDelay() for periodic tasks in FreeRTOS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to delay the task for 100 ticks.

FreeRTOS

vTaskDelay([1]);

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

A100

B1000

C10

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using milliseconds instead of ticks.

Forgetting that the argument is in ticks, not time units.

The function vTaskDelay() pauses the task for the specified number of ticks. Here, 100 ticks is the correct delay.

2fill in blank

medium

Complete the code to create a periodic task that delays for 200 ticks.

FreeRTOS

for (;;) {
    // Task code here
    vTaskDelay([1]);
}

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

A50

B20

C200

D500

Attempts:

3 left

💡 Hint

Common Mistakes

Using too short or too long delay values.

Not placing the delay inside the infinite loop.

The task delays for 200 ticks each cycle to run periodically every 200 ticks.

3fill in blank

hard

Fix the error in the code to correctly delay the task for 500 ticks.

FreeRTOS

vTaskDelay([1]); // Delay for 500 ticks

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

A5

B500

C50

D5000

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing milliseconds with ticks.

Using a value ten times too large or too small.

The correct delay is 500 ticks, so the argument must be 500.

4fill in blank

hard

Fill both blanks to create a periodic task that delays for 100 ticks and prints "Tick" each cycle.

FreeRTOS

for (;;) {
    printf([1]);
    vTaskDelay([2]);
}

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

A"Tick\n"

B100

C"Hello"

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Printing the wrong string.

Using the wrong delay value.

The task prints "Tick" and then delays for 100 ticks to run periodically.

5fill in blank

hard

Fill all three blanks to create a periodic task that prints the count, delays for 50 ticks, and increments the count.

FreeRTOS

int count = 0;
for (;;) {
    printf([1], [2]);
    vTaskDelay([3]);
    count++;
}

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

A"Count: %d\n"

Bcount

C50

D"Value: %d\n"

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong format string.

Printing a wrong variable.

Using incorrect delay value.

The task prints the current count, delays for 50 ticks, then increments the count for the next cycle.