//AT91F_PIO_CfgPeriph (AT91C_BASE_PIOA, AT91C_ID_US0, 0);
  AT91F_US0_CfgPMC;
  AT91F_US0_CfgPIO;
  AT91F_US_Configure (AT91C_BASE_US0, AT91C_US_CLKS_CLOCK, AT91C_US_ASYNC_MODE, 115200, 20);

// Enable USART-0 clock
//AT91F_PMC_EnablePeriphClock ( AT91C_BASE_PMC, 1 << AT91C_ID_US0 ) ;
//AT91F_US_SetBaudrate ( AT91C_BASE_US0, 48000000, 4800);
  AT91F_US_EnableTx ( AT91C_BASE_US0);
  AT91F_US_EnableRx ( AT91C_BASE_US0)