question about MSP430F5418A UART

Other Parts Discussed in Thread: MSP430F5418A

Hi there,

I'm using MSP430F5418A UART to communicate with PC. The problem I encountered is the program couldn't enter RX ISR, so I couldn't receive data transfered from

PC. Before using UART, I configured relevant registers and enabled RX interrupt. Then I run the program, but I couldn't get any data. Please help me.

The following is part of my program:

UCA1CTL1 |= UCSWRST;                      // **Put state machine in reset**
    UCA1CTL1 |= UCSSEL_1;                     // CLK = ACLK
    UCA1BR0 = 0x03;                                    // 32kHz/9600=3.41 (see User's Guide)
    UCA1BR1 = 0x00;                                   
    UCA1MCTL = UCBRS_3+UCBRF_0;       // Modulation UCBRSx=3, UCBRFx=0
    UCA1CTL1 &= ~UCSWRST;                     // **Initialize USCI state machine**
    UCA1IE |= UCRXIE;                         // Enable USCI_A1 RX interrupt
    __bis_SR_register(GIE);                   // interrupts enabled
    __no_operation();           

UART ISR:

#pragma vector=USCI_A1_VECTOR
__interrupt void USCI_A1_ISR(void)
{
 int i;
  switch(__even_in_range(UCA1IV,4))
  {
  case 0:break;                             // Vector 0 - no interrupt
  case 2:                                         // Vector 2 - RXIFG 
    for(i=10;i>=0;i--)
       {
        rx_buffer[i] = UCA1RXBUF;         
        decode();                           
       }                                    
    break;
  case 4:                                   // Vector 4 - TXIFG
   for(i=0;i<=10;i++)
      {
       UCA1TXBUF = tx_buffer[i];
      }
   break;
  default: break; 
  }
}  

Is there something wrong with my configuration?

Thank you

Best regards

Nick