/**
* Update UART0 Configuration 
*
* \param -
* \return -
*
* \see -
*/
void UART0_UpdateConfig(void)
{ 
  switch(UART0.Mode)
  {
  case UART0_MODE_RS232:        // UART 0 = RS232 
    U0CTL |= SWRST;             // Software Reset UART 0 (clear ISR as well!)
    P3SEL &= 0xF1;              // Disable SPI 0
    P3OUT |= 0x02;              // Set SPI_0_SOMI to complete signal
    P3SEL |= 0x30;              // Enable UART 0
    
    U0CTL &= ~ PENA;  
    U0CTL &= ~ PEV;   
    U0CTL &= ~ SPB;   
    U0CTL |=   CHAR;            // 8n1
    U0CTL &= ~ LISTEN;  
    U0CTL &= ~ SYNC;            // Clear Flag: Set in SPI Mode!
    U0CTL &= ~ MM;              // Clear Flag: Set in SPI Mode!
    
    U0TCTL &= ~ CKPL;     
    U0TCTL |=   SSEL0;          // BRCLK = ACLK
    U0TCTL &= ~ URXSE;   
    U0TCTL &= ~ TXWAKE;    
    U0TCTL |=   TXEPT;     
    
    U0RCTL &= ~ FE;        
    U0RCTL &= ~ PE;        
    U0RCTL &= ~ OE;       
    U0RCTL &= ~ BRK;         
    U0RCTL &= ~ URXEIE;      
    U0RCTL &= ~ URXWIE;        
    U0RCTL &= ~ RXWAKE;       
    U0RCTL &= ~ RXERR;       
       
    switch(UART0.Baud)
    {
    case BAUDRATE_1200:   
      U0BR0 = BAUDRATE_1200_BRO;
      U0BR1 = BAUDRATE_1200_BR1;  
      U0MCTL = BAUDRATE_1200_MCTL; 
      break;   
    case BAUDRATE_2400: 
      U0BR0 = BAUDRATE_2400_BRO;
      U0BR1 = BAUDRATE_2400_BR1;
      U0MCTL = BAUDRATE_2400_MCTL;
      break;   
    case BAUDRATE_4800:   
      U0BR0 = BAUDRATE_4800_BRO;  
      U0BR1 = BAUDRATE_4800_BR1;  
      U0MCTL = BAUDRATE_4800_MCTL; 
      break;
    case BAUDRATE_9600:   
      U0BR0 = BAUDRATE_9600_BRO;  
      U0BR1 = BAUDRATE_9600_BR1;  
      U0MCTL = BAUDRATE_9600_MCTL; 
      break;  
    case BAUDRATE_19200:
      U0BR0 = BAUDRATE_19200_BRO; 
      U0BR1 = BAUDRATE_19200_BR1; 
      U0MCTL = BAUDRATE_19200_MCTL; 
      break;  
    case BAUDRATE_38400:  
      U0BR0 = BAUDRATE_38400_BRO; 
      U0BR1 = BAUDRATE_38400_BR1; 
      U0MCTL = BAUDRATE_38400_MCTL; 
      break;  
    case BAUDRATE_57600:
      // Communication with PC 
      U0BR0 = BAUDRATE_57600_BRO; 
      U0BR1 = BAUDRATE_57600_BR1; 
      U0MCTL = BAUDRATE_57600_MCTL; 
      break;  
    case BAUDRATE_115200: 
      U0BR0 = BAUDRATE_115200_BRO;
      U0BR1 = BAUDRATE_115200_BR1;
      U0MCTL = BAUDRATE_115200_MCTL; 
      break;  
    default:
      // Default baudrate: communication with PC
      U0BR0 = BAUDRATE_57600_BRO; 
      U0BR1 = BAUDRATE_57600_BR1; 
      U0MCTL = BAUDRATE_57600_MCTL; 
      break;
    }

    U0TXBUF = 0x00;          
    ME1   &= ~ USPIE0;         // Reset SPI Settings
    ME1   |=   UTXE0 + URXE0;  // Enable TXD/RXD
    U0CTL &= ~ SWRST;          // clear software reset       
    IE1   |=   URXIE0;         // Enable RX interrupt    
    break;
    
  case UART0_MODE_SPI:          // UART0 = SPI
    U0CTL |= SWRST;             // Software Reset UART 0 (clear ISR as well!)
    P3SEL &= 0xCF;              // Disable UART 0
    P3OUT |= 0x10;              // Release UART0_TX -> switch doesn't work
                                // without release!!!
    P3SEL |= 0x0E;              // Enable SPI 0
    
    U0CTL |=   CHAR;            // 8 bit data length
    U0CTL &= ~ LISTEN;       
    U0CTL |=   SYNC;            // SPI Mode
    U0CTL |=   MM;              // MSP is Master
    
    U0TCTL &= ~ CKPH;     
    U0TCTL &= ~ CKPL;       
    U0TCTL |=   SSEL0;          // ACLK source (4MHz)
    U0TCTL |=   STC;            // 3 pin SPI mode: STE disable    
    U0TCTL |=   TXEPT;     
    
    U0RCTL &= ~ FE;       
    U0RCTL &= ~ OE;        
    
    U0BR0  =  0xFA;             // 4Mhz / Baudrate = U1BR (16 Bit Register)
    U0BR1  =  0x00;             // U1BR = U1BR0 + U1BR1  --> 16 Pulse in 5ms fix!
    U0MCTL =  0x00;             // no Modulation
    
    U0TXBUF = 0x00;       
    
    ME1   &= ~ (UTXE0 + URXE0); // Reset RS232 Settings
    ME1   |=   USPIE0;          // enable SPI
    U0CTL &= ~ SWRST;           // clear software reset        
    IE1   |=   URXIE0;          // enable RX-interrupt
    break;
    
  default:
    break;
  }
}