The UART

This book is about building a UART driver. So of course we have to have chapter that explains :

• what the UART is
• How the UART works
• Its uses
• Protocols involved
• UART registers
• insert many other buzz-sentences here

This chapter covers the theory about the UART itself.
Before we build a driver for any piece of hardware, we have to understand that piece of hardware first.
So here goes...