UARTCFIFO
writeb(UARTCFIFO_RXFLUSH, sport->port.membase + UARTCFIFO);
sport->port.membase + UARTCFIFO);
sport->port.membase + UARTCFIFO);
fifo = readb(port->membase + UARTCFIFO);
writeb(fifo, port->membase + UARTCFIFO);
port->membase + UARTCFIFO);
writeb(UARTCFIFO_RXFLUSH, sport->port.membase + UARTCFIFO);