That article discussed the use of memory-mapped LED control registers, buffers, and a clock source, all used to blink an LED without burdening the microcontroller code with the task.

Adding to the Example Hardware The example code that I’ve been working with on the last two parts of this tutorial is a bit boring. It makes one LED blink on and off at a rate of about 1 Hz.

Chapter 1, page 11 This code is basic but allows the reader to gain insight into key elements for several other projects in this book. It combines two pieces of code that are listed in the examples ...