UTSR0_TO_SM
sport->port.read_status_mask &= ~UTSR0_TO_SM(UTSR0_TFS);
sport->port.read_status_mask |= UTSR0_TO_SM(UTSR0_TFS);
UTSR0_TO_SM(UART_GET_UTSR0(sport));
UTSR0_TO_SM(UART_GET_UTSR0(sport));
sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS);
UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);
UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);