Adding an UART to AVR8 in Papilio One Posted December 16, 2012 · Report reply Hello whitewolf,I haven't forgotten about this, I tried to put together an example this weekend. But I upgraded to Windows 8 and now I'm having all kinds of troubles with the Xilinx tools. So I have to figure out what is going on before I can put the example together for you.You are heading in the right direction though, the only other thing is that you need to change the register address that the second UART is connected to. So you have to make a copy of the uart.vhdl file and put the register address in the free memory space that the user code examples use.Jack.I dont understand which register address and where i can find the free memory space that the user code examples use. I will wait for your example.Thank you..