Once you have a schematic, an eval board, and a set of requirements, you are ready to begin design of your embedded software system. This ebook demonstrates a topdown architecture technique, helps with the choice of runtime pattern, and develops module interaction diagrams for the example system. It reveals how a finished design emerges from the repeated interaction between architecture studies, module interaction analysis, and code prototyping. Readily available hardware is pictured and code libraries shown which allow the reader to build, and debug their own version of the example project.