UART01x_RSR_BE
if (rsr & UART01x_RSR_BE) {
if (rsr & UART01x_RSR_BE)
port->read_status_mask |= UART01x_RSR_BE;
port->ignore_status_mask |= UART01x_RSR_BE;
#define UART01x_RSR_ANY (UART01x_RSR_OE | UART01x_RSR_BE | UART01x_RSR_PE | UART01x_RSR_FE)