See the top level README for information on where to find the schematic and programmers reference manual for the ARM processor on the raspberry pi. Also find information on how to load and run these programs. This is similar to the uart## examples except it uses the full blown uart not the mini uart. UART0 instead of UART1. Same gpio pins are used, different alternate gpio functions. uart clock is 3000000HZ. It spits out a bunch of stuff then goes into an echo loop. See the top level README file for information on how to connect the raspi uart to your host computer. Using a dumb terminal (minicom) 115200 board No parity 8 bits 1 stop bit, no flow control (might have to exit minicom and start again for the flow control setting to take). What you type on the dumb terminal comes back.