#include "io430.h"
#define uchar unsigned char
#define uint unsigned int
void BCSplus_init(void)
{
    BCSCTL2 = SELM_3 + DIVM_0 + SELS + DIVS_0;

    if (CALBC1_1MHZ != 0xFF) {
        DCOCTL = 0x00;
        BCSCTL1 = CALBC1_1MHZ;      /* Set DCO to 1MHz */
        DCOCTL = CALDCO_1MHZ;
    }
    BCSCTL1 |= XT2OFF + DIVA_0;
    BCSCTL3 = XT2S_3 + LFXT1S_0 + XCAP_1;
}

int main( void )
{
  WDTCTL =WDT_ADLY_1000;
  BCSplus_init();
  IE1|=WDTIE;
  P1DIR|=0X01;
  P1OUT|=BIT0;
  __enable_interrupt();
  while(1);
//  return 0;
}

#pragma vector=WDT_VECTOR
__interrupt void watchdog_timer(void)
{
  P1OUT=(~P1OUT)&0x01;
}
用的是LaundPad---2553的板子，那个LED灯一直亮。。。很久才灭，时间不对，但是，我设定的是1000ms的定时中断，哪里不对了，求助啊！！！谢了 此帖出自小平头技术问答