Hi Lichen, > Can I be of any help to your UART project? Yes, that would be nice, if you can help us with the UART project. Could you be interested to modify the UART project to a UART 16450/16550 compatible. Unfortunately, I do not have time anymore to work on it. And , if you like, to include also an IrDA encoder/decoder in it ... ;) Best regards, Ovidiu Lupas