EAP_UART_STATUS
if (!(EREAD1(sc, EAP_UART_STATUS) & EAP_US_TXRDY))
if (EREAD1(sc, EAP_UART_STATUS) & EAP_US_RXINT) {
while (EREAD1(sc, EAP_UART_STATUS) & EAP_US_RXRDY) {
if (EREAD1(sc, EAP_UART_STATUS) & EAP_US_TXINT) {