The Snickerdoodle Book/Baseboards
An extremely convenient way to work with Snickerdoodle is through a baseboard. Baseboards can be used for everything from exposing the I/O to easy to access pin headers (i. e., the breakyBreaky breakyout board) to providing fully integrated hardware interfaces (e. g., HDMI, Ethernet, motor controllers/drivers). The connectors down configuration, referenced in Chapter 2 .
For more details see Chapter 25 here.