7.4 - Writing the Ranging Sensor Kernel Module
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What does GPIO stand for?
💡 Hint: Think about a hardware interface that can change behavior.
What does a kernel module do?
💡 Hint: Recall that it can be loaded and unloaded.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the role of the trigger pin in the ultrasonic sensor?
💡 Hint: Think about which step comes first in the distance measurement.
True or False: The distance measured by the ultrasonic sensor can be calculated without considering the time of flight.
💡 Hint: Recall the formula of distance calculation involving time.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
Write a detailed function that handles measurement of distance, including error checking for timeouts on echo.
💡 Hint: Remember to handle time calculation carefully.
Discuss the implications of not freeing GPIO resources in a kernel module.
💡 Hint: Think about resource usage over time and its effects.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.