stm32L151低功耗问题，跪求大神解决，进不了RTC中断。

划破星空的泪痕 · 发表于 2015-6-29 17:28:18

GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;

/* Allow access to RTC */
PWR_RTCAccessCmd(ENABLE);

/*!< LSI Enable */
RCC_LSICmd(ENABLE);

/*!< Wait till LSI is ready */
while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
{}

/*!< RTC Clock Source Selection */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);

/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);

/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();

/* Configure all GPIO as analog to reduce current consumption on non used IOs */
/* Enable GPIOs clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB | RCC_AHBPeriph_GPIOC |
RCC_AHBPeriph_GPIOD | RCC_AHBPeriph_GPIOE | RCC_AHBPeriph_GPIOH , ENABLE);

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_Init(GPIOE, &GPIO_InitStructure);
GPIO_Init(GPIOH, &GPIO_InitStructure);
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_Init(GPIOB, &GPIO_InitStructure);

/* Disable GPIOs clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB | RCC_AHBPeriph_GPIOC |
RCC_AHBPeriph_GPIOD | RCC_AHBPeriph_GPIOE | RCC_AHBPeriph_GPIOH , DISABLE);


/* EXTI configuration *******************************************************/
EXTI_ClearITPendingBit(EXTI_Line20);
EXTI_InitStructure.EXTI_Line = EXTI_Line20;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

/* Enable the RTC Wakeup Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = RTC_WKUP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);


/* Enable Ultra low power mode */
PWR_UltraLowPowerCmd(ENABLE);

/* RTC Wakeup Interrupt Generation: Clock Source: RTCCLK_Div16, Wakeup Time Base: ~4s
RTC Clock Source LSI ~37KHz
*/
RTC_WakeUpClockConfig(RTC_WakeUpClock_RTCCLK_Div16);
RTC_SetWakeUpCounter(0x2421);

/* Enable the Wakeup Interrupt */
RTC_ITConfig(RTC_IT_WUT, ENABLE);


/* Enable Wakeup Counter */
RTC_WakeUpCmd(ENABLE);

/* Enter Stop Mode */
PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);