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用msp430 2619写的串口发送程序 #include "msp430x26x.h" unsigned char b; //时钟初始化 void clock_init(void) { if (CALBC1_16MHZ ==0xFF || CALDCO_16MHZ == 0xFF) { while(1); // If calibration constants erased // do not load, trap CPU!! } BCSCTL1 = CALBC1_16MHZ; // Set DCO to 16MHz DCOCTL = CALDCO_16MHZ; // BCSCTL2=(SELM_0+DIVM_1+DIVS_3+DCOR)^SELS; BCSCTL2|=DIVS_3;//SMCLK 8分频 2M // BCSCTL2|=DIVM_3; //MCLK 8分频 系统运行时钟 // Timer A0 interrupt service routine } //IO初始化 void io_init(void) { P1DIR|=BIT0; P5DIR|=BIT5; P5SEL|=BIT5; P3SEL = 0x30; // P3.4,5 = USCI_A0 TXD/RXD P3DIR|=BIT4; } void main(void) { WDTCTL = WDTPW + WDTHOLD; // Stop WDT //时钟初始化 clock_init(); io_init(); UCA0CTL1|=UCSWRST; UCA0CTL0&=~UC7BIT;//字符长度为8 UCA0CTL1 |= UCSSEL_2; // SMCLK UCA0BR0 = 208; // 2MHz 9600 UCA0BR1 = 0; // 2MHz 9600 UCA0MCTL =UCBRS1; // Modulation UCBRSx = 1 UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine** IE2 |= UCA0RXIE+UCA0TXIE; // Enable USCI_A0 RX interrupt // IE2 |= UCA0TXIE; __bis_SR_register(LPM0_bits + GIE); // Enter LPM0, interrupts enabled for(;;) { // UCA0TXIFG=0; UCA0TXBUF=0x33; while((IFG2&UCA0TXIFG)==0); //查询发送是否结束 IFG2&=~UCA0TXIFG; //清除发送一标志位 } } // 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? //b = UCA0RXBUF; // TX -> RXed character } 用串口调试助手观察每次都是FF 单步运行时也会卡主,求助啊 已经卡了好几天了,也没有人回复,看了手册资料也没有进展
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