[求助] MSP430 F5529串口和蓝牙使用

wendywang 2014-5-12 12:16 楼主

P4.4，P4.5接的是蓝牙的TXD和RXD。
程序运行后，手机蓝牙串口发送数据，代码调试是总是不进中断，应该没有收到。不知为何？
代码如下：
#include

int main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                // Stop WDT
  P4SEL = BIT4+BIT5;                      // P3.4,5 = USCI_A0 TXD/RXD
  UCA1CTL1 |= UCSWRST;                   // **Put state machine in reset**
  UCA1CTL1 |= UCSSEL_2;                   // SMCLK
  UCA1BR0 = 6;                            // 1MHz 9600 (see User's Guide)
  UCA1BR1 = 0;                            // 1MHz 9600
  UCA1MCTL = UCBRS_0 + UCBRF_13 + UCOS16; // Modln UCBRSx=0, UCBRFx=0,
                                          // over sampling
  UCA1CTL1 &= ~UCSWRST;                   // **Initialize USCI state machine**
  UCA1IE |= UCRXIE;                      // Enable USCI_A0 RX interrupt

  //UCA1TXBUF = 0x00;

  __bis_SR_register(LPM0_bits + GIE);    // Enter LPM0, interrupts enabled
  __no_operation();                      // For debugger
}

// Echo back RXed character, confirm TX buffer is ready first
#pragma vector=USCI_A1_VECTOR
__interrupt void USCI_A1_ISR(void)
{
  switch(__even_in_range(UCA1IV,4))
  {
  case 0:break;                            // Vector 0 - no interrupt
  case 2:                                  // Vector 2 - RXIFG
while (!(UCA1IFG&UCTXIFG));          // USCI_A0 TX buffer ready?
UCA1TXBUF = UCA1RXBUF;                // TX -> RXed character
break;
  case 4:break;                            // Vector 4 - TXIFG
  default: break;
  }
}