8.3.3. Interrupts on GPIO

Try these first

1. 1.

   What does GPIO stand for?

   Hint

   Think about what the pins do.

2. 2.

   What happens when a GPIO pin senses a change in input?

   Hint

   Recall our discussion on event-driven examples.

3. 3.

   What is the function of a GPIO interrupt?

   • To continuously check pin states
   • To temporarily halt current CPU operations for an event
   • To increase the power supply to the microcontroller

   Hint

   Remember how interrupts improve responsiveness in your designs.

4. 4.

   True or False: Pull-up resistors are used to prevent GPIO pins from floating.

   • True
   • False

   Hint

   Think about the stability of the signal when the button isn't pressed.

5. 5.

   Design an embedded system that uses GPIO interrupts to control a fan based on temperature readings from a sensor.

   Hint

   Think about real-time applications of sensors and GPIO.

6. 6.

   You're creating a remote-controlled car. Describe how you would use GPIO interrupts to make the car stop when a button is pressed.

   Hint

   Focus on how you can interrupt the current operation for immediate reaction.