UARTCTRL_M
ctrl = old_ctrl & ~(UARTCTRL_M | UARTCTRL_M7);
ctrl |= UARTCTRL_M;
ctrl |= UARTCTRL_M;
ctrl |= UARTCTRL_M;
if ((ctrl & (UARTCTRL_PE | UARTCTRL_M)) == UARTCTRL_PE)
if (cr & UARTCTRL_M)