SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0);            EXTI_InitStructure.EXTI_Line=EXTI_Line0;          EXTI_InitStructure.EXTI_LineCmd=ENABLE;          EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;          EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Falling;          EXTI_Init(&EXTI_InitStructure);                              NVIC_InitStructure.NVIC_IRQChannel = EXTI0_1_IRQn;          NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;          NVIC_InitStructure.NVIC_IRQChannelPriority=0;          NVIC_Init(&NVIC_InitStructure);                PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);   //进入STOP模式  　　　　//PWR_EnterSTANDBYMode();   进入待机模式//进入待机模式，不需要配置中断，不进入中断void EXTI0_1_IRQHandler(){  NVIC_SystemReset();  EXTI_ClearITPendingBit(EXTI_Line0);}