/* Clears the states of the RTS modem control signals. 
The  */
void xUARTModemControlClear(unsigned long ulBase, unsigned long ulControl)
/* Clears the states of the RTS modem control signals. 
The  */
void xUARTModemControlClear(unsigned long ulBase, unsigned long ulControl)
{
    xASSERT((ulBase == UART0_BASE) ||(ulBase == UART1_BASE) );
    xHWREG(ulBase + UART_MCR) &= ~(ulControl & UART_MCR_RTS);
}