launch pad有谁调试过串口的了？

只看该作者 · 2012-7-11 11:35

用TI官网上的例子，还有串口调试助手，老看不到收到的数据，谁调试过的？
//******************************************************************************
// MSP430G2xx3 Demo - USCI_A0, 9600 UART Echo ISR, DCO SMCLK
//
// Description: Echo a received character, RX ISR used. Normal mode is LPM0.
// USCI_A0 RX interrupt triggers TX Echo.
// Baud rate divider with 1MHz = 1MHz/9600 = ~104.2
// ACLK = n/a, MCLK = SMCLK = CALxxx_1MHZ = 1MHz
//
//             MSP430G2xx3
//          -----------------
//       /|\|             XIN|-
//       | |                |
//       --|RST       XOUT|-
//          |                |
//          |    P1.2/UCA0TXD|------------>
//          |                | 9600 - 8N1
//          |    P1.1/UCA0RXD|<------------
//
// D. Dang
// Texas Instruments Inc.
// February 2011
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************
#include  "msp430g2553.h"
void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                // Stop WDT
  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
  P2DIR = 0xff;
  UCA0CTL1 |= UCSSEL_2;                   // SMCLK
  UCA0BR0 = 104;                         // 1MHz 9600
  UCA0BR1 = 0;                            // 1MHz 9600
  UCA0MCTL = UCBRS0;                      // Modulation UCBRSx = 1
  UCA0CTL1 &= ~UCSWRST;                   // **Initialize USCI state machine**
  IE2 |= UCA0RXIE;                         // Enable USCI_A0 RX interrupt
  __bis_SR_register(LPM0_bits + GIE);    // Enter LPM0, interrupts enabled
}
//  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
}