MSP430：串口輸出

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 }

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 }

1 //發(fā)送數(shù)據(jù)

2 //發(fā)送字符

3 void uart_send_ch(unsigned char ch)

4 {

5

6 while(!(IFG2& UCA0TXIFG)); //查詢發(fā)送是否結(jié)束

7 UCA0TXBUF = ch;

8 IFG2&=~UCA0TXIFG; //清除發(fā)送一標志位

9 }

10

11 //發(fā)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 }

在用uart_send_str（）發(fā)送一個數(shù)組合緊接著發(fā)送回車會出現(xiàn)亂碼，大約九個字符出現(xiàn)，在中間delay一下解決了

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);

}