UARTFR
fr = bus_space_read_1(iot, ioh, UARTFR);
fr = bus_space_read_1(iot, ioh, UARTFR);
fr = bus_space_read_1(iot, ioh, UARTFR);
while ((bus_space_read_1(iot, ioh, UARTFR) & FR_RXFE) == 0 &&
while (WMCOM_CNREAD_1(UARTFR) & FR_RXFE);
while (WMCOM_CNREAD_1(UARTFR) & FR_TXFF);
while (WMCOM_CNREAD_1(UARTFR) & FR_BUSY);