UART_CHANNEL_STS
while (!ISSET(bus_space_read_4(iot, ioh, UART_CHANNEL_STS), STS_REMPTY) &&
!(bus_space_read_4(iot, ioh, UART_CHANNEL_STS) & STS_TFUL)) {
sts = bus_space_read_4(iot, ioh, UART_CHANNEL_STS);
sts = bus_space_read_4(iot, ioh, UART_CHANNEL_STS);
sts = bus_space_read_4(iot, ioh, UART_CHANNEL_STS);
!(bus_space_read_4(iot, ioh, UART_CHANNEL_STS) & STS_TFUL)) {
while ((sts = bus_space_read_4(iot, ioh, UART_CHANNEL_STS))
!(bus_space_read_4(iot, ioh, UART_CHANNEL_STS) & STS_REMPTY)) {
if (!(bus_space_read_4(iot, ioh, UART_CHANNEL_STS) & STS_TFUL)) {
bus_space_write_4(regsp->ur_iot, regsp->ur_ioh, UART_CHANNEL_STS, 0xffff);