The VHDL code provided with this article (“VHDL Code Listing” at www.electronicdesign.com, Drill Deeper 19222) is an example of one way to implement the LED driver in a CPLD.

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.