【求助啊！】K60 RTC时钟初始化BUG

OMG!!

  SIM_SCGC6 |= SIM_SCGC6_RTC_MASK;

  /*Only VBAT_POR has an effect on the SRTC, RESET to the part does not, so you must manually reset the SRTC to make sure everything is in a known state*/
  /*clear the software reset bit*/
  RTC_CR  = RTC_CR_SWR_MASK;
  RTC_CR  &= ~RTC_CR_SWR_MASK;  
程序一运行到这就跑飞，求助啊