Practice - Program 3: Delay Generation using a Timer (Polling Method) - 5.3
Practice Questions
Test your understanding with targeted questions
What is the purpose of the prescaler in a timer?
💡 Hint: Think about how we alter clock speeds.
What does the Update Interrupt Flag (UIF) indicate?
💡 Hint: What do we check to know when a timer is done?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the role of the prescaler in an ARM timer?
💡 Hint: Consider how timer speeds are adjusted.
True or False: Polling the UIF flag is necessary to know when the timer has finished counting.
💡 Hint: What are we waiting for to confirm the timer is done?
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Challenge Problems
Push your limits with advanced challenges
If the system clock is set to 72 MHz and the prescaler is set to 7199, calculate the timer counter frequency. Then determine the ARR for a desired delay of 2 seconds.
💡 Hint: Use the formula for counter frequency based on the prescaler.
Create a timer configuration for generating a 300 ms delay using a clock frequency of 84 MHz, and explain how you derived the prescaler and ARR values.
💡 Hint: Think about how you calculate counts required based on the timer frequency.
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