// Configure the Crossbar and GPIO ports
//
void PORT_Init (void)
{
   XBR0    |= 0x04;                    // Enable UART0
   XBR2    |= 0x40;                    // Enable crossbar and weak pull-ups
   P0MDOUT |= 0x01;                    // enable TX0 as a push-pull output
   P1MDOUT |= 0x40;                    // enable LED as push-pull output


   P3MDOUT = 0x00;                     // P3.7 is open-drain

   P3     |= 0x80;                     // Set P3.7 latch to '1'

}