Chapter 5. Serial I/O

This chapter gives you a lot of bang for the buck. Before it’s all over, you’re going to have learned how to communicate between the AVR and your desktop or laptop computer and constructed a cheesy computer-controlled musical instrument.

Along the way, you’re going to learn a little about serial communications protocols, and how you can generate quick-and-dirty audio with the AVRs. Serial communication is the simplest possible way to interface your microcontroller with your desktop or laptop computer, your first step toward bridging the world of the physical and the virtual.

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