MSP430：串口输出

初始化

void Uart_Init(void)
{
      BCSCTL1 = CALBC1_1MHZ;                    // Set DCO
      DCOCTL = CALDCO_1MHZ;
      P1SEL = BIT1 + BIT2 ;                     // P1.1 = RXD, P1.2=TXD
      P1SEL2 = BIT1 + BIT2 ;                    // P1.1 = RXD, P1.2=TXD
      UCA0CTL1 |= UCSSEL_2;                     // SMCLK
      UCA0BR0 = 104;                            // 1MHz 9600
      UCA0BR1 = 0;                              // 1MHz 9600
      UCA0MCTL = UCBRS0;                        // Modulation UCBRSx = 1
      UCA0CTL1 &= ~UCSWRST;                     // **Initialize USCI state machine**
      IE2 |= UCA0RXIE;                          // Enable USCI_A0 RX interrupt
}

//  Echo back RXed character, confirm TX buffer is ready first
#pragma vector=USCIAB0RX_VECTOR
__interrupt void USCI0RX_ISR(void)
{
  while (!(IFG2&UCA0TXIFG));                // USCI_A0 TX buffer ready?
  UCA0TXBUF = UCA0RXBUF;                   // TX -> RXed character
}

//发送数据
//发送字符
void uart_send_ch(unsigned char ch)
{

    while(!(IFG2& UCA0TXIFG)); //查询发送是否结束
    UCA0TXBUF = ch;
    IFG2&=~UCA0TXIFG; //清除发送一标志位
}

//发送字符串
void uart_send_str(char *str)
{
      for( ; *str ; )
      {
          uart_send_ch((unsigned char)*str);
          str++;
      }
}

 在用uart_send_str（）发送一个数组合紧接着发送回车会出现乱码，大约九个字符出现，在中间delay一下解决了

 char a[4];  

 uart_send_str(a);

 __delay_cycles(5);  

uart_send_huiche();

void uart_send_huiche(void)
{
    uart_send_ch(0x0d);
    uart_send_ch(0x0a);
}