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 = ;                            // 1MHz 9600
       UCA0BR1 = ;                              // 1MHz 9600
       UCA0MCTL = UCBRS0;                        // Modulation UCBRSx = 1
       UCA0CTL1 &= ~UCSWRST;                     // **Initialize USCI state machine**
       IE2 |= UCA0RXIE;                          // Enable USCI_A0 RX interrupt
 }

Uart_Init

 //  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
 }

接收数据

 //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++;
       }
 }

发送

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);
}