UART_STAT_PARERR
c_status |= UART_STAT_PARERR;
out |= UART_STAT_PARERR;
xc |= UART_STAT_PARERR;
rx |= UART_STAT_PARERR;
xc |= UART_STAT_PARERR;
if (xc & UART_STAT_PARERR)