attachInterrupt() function in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to attach an interrupt to pin 2 that calls the function handleInterrupt.

Arduino

attachInterrupt(digitalPinToInterrupt(2), [1], RISING);

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

Ainterrupt

BhandleInterrupt

CinterruptHandler

Dhandle

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function name that is not defined.

Passing the function call with parentheses instead of just the name.

The function attachInterrupt() requires the name of the function to call when the interrupt occurs. Here, handleInterrupt is the correct function name.

2fill in blank

medium

Complete the code to attach an interrupt on pin 3 that triggers on a falling edge and calls the function interruptRoutine.

Arduino

attachInterrupt(digitalPinToInterrupt(3), interruptRoutine, [1]);

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

AFALLING

BCHANGE

CLOW

DRISING

Attempts:

3 left

💡 Hint

Common Mistakes

Using RISING instead of FALLING.

Using LOW which is not a valid mode for attachInterrupt().

The third argument of attachInterrupt() specifies the mode. FALLING triggers the interrupt when the signal goes from HIGH to LOW.

3fill in blank

hard

Fix the error in the code to correctly attach an interrupt to pin 4 calling the function onInterrupt when the pin changes state.

Arduino

attachInterrupt([1], onInterrupt, CHANGE);

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

AdigitalPinToInterrupt(4)

B4

Cpin4

Dinterrupt4

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the pin number directly instead of using digitalPinToInterrupt.

Using invalid identifiers like 'pin4' or 'interrupt4'.

The first argument to attachInterrupt() must be the interrupt number, which is obtained by digitalPinToInterrupt(pin) for the given pin.

4fill in blank

hard

Fill both blanks to attach an interrupt on pin 5 that calls the function myISR when the signal goes LOW.

Arduino

attachInterrupt([1], [2], LOW);

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

AdigitalPinToInterrupt(5)

BmyISR

CinterruptHandler

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using the pin number directly instead of digitalPinToInterrupt.

Using a wrong function name.

The first blank requires the interrupt number from digitalPinToInterrupt(5). The second blank is the function name myISR to call on interrupt.

5fill in blank

hard

Fill all three blanks to create a dictionary mapping pins to their interrupt modes for pins 6, 7, and 8.

Arduino

interruptModes = {6: [1], 7: [2], 8: [3]

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ARISING

BFALLING

CCHANGE

DLOW

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid modes or repeating the same mode for all pins.

Using lowercase instead of uppercase for modes.

The dictionary assigns LOW mode to pin 6, FALLING to pin 7, and CHANGE to pin 8 as interrupt modes.