MSP430：串口输出

初始化

 1 void Uart_Init(void)
 2 {
 3       BCSCTL1 = CALBC1_1MHZ;                    // Set DCO
 4       DCOCTL = CALDCO_1MHZ;
 5       P1SEL = BIT1 + BIT2 ;                     // P1.1 = RXD, P1.2=TXD
 6       P1SEL2 = BIT1 + BIT2 ;                    // P1.1 = RXD, P1.2=TXD
 7       UCA0CTL1 |= UCSSEL_2;                     // SMCLK
 8       UCA0BR0 = 104;                            // 1MHz 9600
 9       UCA0BR1 = 0;                              // 1MHz 9600
10       UCA0MCTL = UCBRS0;                        // Modulation UCBRSx = 1
11       UCA0CTL1 &= ~UCSWRST;                     // **Initialize USCI state machine**
12       IE2 |= UCA0RXIE;                          // Enable USCI_A0 RX interrupt
13 }
Uart_Init

 

1 //  Echo back RXed character, confirm TX buffer is ready first
2 #pragma vector=USCIAB0RX_VECTOR
3 __interrupt void USCI0RX_ISR(void)
4 {
5   while (!(IFG2&UCA0TXIFG));                // USCI_A0 TX buffer ready?
6   UCA0TXBUF = UCA0RXBUF;                   // TX -> RXed character
7 }
接收数据
 1 //发送数据
 2 //发送字符
 3 void uart_send_ch(unsigned char ch)
 4 {
 5 
 6     while(!(IFG2& UCA0TXIFG)); //查询发送是否结束
 7     UCA0TXBUF = ch;
 8     IFG2&=~UCA0TXIFG; //清除发送一标志位
 9 }
10 
11 //发送字符串
12 void uart_send_str(char *str)
13 {
14       for( ; *str ; )
15       {
16           uart_send_ch((unsigned char)*str);
17           str++;
18       }
19 }
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);
}

posted @ 2013-07-12 10:08  wwjdwy  阅读(692)  评论(0)  编辑  收藏  举报