11.3.2. Timers

Try these first

1. 1.

   What is a prescaler used for in timer configuration?

   Hint

   Think about how we manage the speed of the timer.

2. 2.

   What does the auto-reload value determine in a timer?

   Hint

   It's about the maximum number the timer can reach.

3. 3.

   What is the main purpose of a prescaler in a timer configuration?

   • To set the maximum count
   • To slow down the timer
   • To manage interrupts

   Hint

   Consider what influences the counting rate of the timer.

4. 4.

   True or False: A timer can only be used without generating interrupts.

   • True
   • False

   Hint

   Think about how timers interact with their surrounding environment.

5. 5.

   Design a timer system for a microcontroller that will turn on an LED every 2 seconds. Write the necessary configurations and explain how each part works.

   Hint

   Consider the clock cycles and how often you want the LED to update.

6. 6.

   How would you modify a timer configuration to switch an application from a 1-second interval to a 10-second interval using the same timer? What changes would you make to the prescaler and the auto-reload register?

   Hint

   Reflect on how these values correlate to the desired output frequency.