冬眠模块RTC在处部电源切断，只有电池供电时不跑了，   关于冬眠模块我的出始化是这样的：     SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);                  //  使能冬眠模块 
    HibernateEnableExpClk(SysCtlClockGet());                                        //  Enables the Hibernation module for operation.              
    HibernateClockSelect(HIBERNATE_CLOCK_SEL_DIV128);                //  对输入时钟进行128分频     
    timeDelay(25 * (8000000UL / 4000));                                                  //  延迟25m秒
    HibernateRTCEnable();                                                                       //  RTC使能              
    timeDelay(25 * (8000000UL / 4000));                                                  //  延迟25m秒
    HibernateRTCMatch0Set(HibernateRTCGet() + 1);                            //   设置匹配中断计数值
    HibernateIntEnable(HIBERNATE_INT_RTC_MATCH_0);                    //   使能匹配0中断
    IntEnable(INT_HIBERNATE);                                                               //   使能冬眠模块中断             请高人指点                           此帖出自小平头技术问答