stm32L151低功耗-LSE做RCT时钟源，wakeup定时周期唤醒无法进入中断？？？？求大佬救命！！

xiaoshigua · 发表于 2020-11-28 17:16:20

最近在搞lora低功耗通信，卡到stm32L151c8t6低功耗了。。。。
下面的程序可以进行睡眠，但是无法唤醒，进不去中断服务函数。。。。给位大佬帮帮忙

int main(void)
{
uint8_t i,a;

RTC_Config();
GPIO_Configuration();
USART1_Config();

while(1)
{
printf("111");
/*控制CPU进入stop模式 */
PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
printf("222");
/* CPU唤醒后，先停止自动唤醒功能 */
RTC_WakeUpCmd(DISABLE);
printf("333");
}
}

void RTC_Config(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  EXTI_InitTypeDef EXTI_InitStructure;

   static RTC_InitTypeDef RTC_InitStructure;
static RTC_TimeTypeDef RTC_TimeStructure;

   static RTC_DateTypeDef RTC_DateStruct;
static RTC_AlarmTypeDef  RTC_AlarmStruct;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
  //allow access to rtc
  PWR_RTCAccessCmd(ENABLE); //启用访问功能
  //RESET RTC Domain
  RCC_RTCResetCmd(ENABLE);
  RCC_RTCResetCmd(DISABLE);
  //LSE enable 32.768k
  RCC_LSEConfig(RCC_LSE_ON);
  //wait till LSE is ready
  while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
  {}
  //rtc clock select
  RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
  //enable rtc clock
  RCC_RTCCLKCmd(ENABLE);
  // wait for rtc APB registers synchronisation
  RTC_WaitForSynchro();

// RTC_InitStructure.RTC_AsynchPrediv = 0x7F;
// RTC_InitStructure.RTC_SynchPrediv = 0xFF;
// RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
// RTC_Init(&RTC_InitStructure);

  //EXIT Config
  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);

//  RTC_AlarmCmd(RTC_Alarm_A,ENABLE);
  //rtc wakeup interrupt generation:clock source:RTCDiv_16,
  //wakeup time base:4s
RTC_WakeUpCmd(DISABLE);  //禁止唤醒计数器

  RTC_WakeUpClockConfig(RTC_WakeUpClock_CK_SPRE_16bits);
  RTC_SetWakeUpCounter(5); //设置唤醒计数器
RTC_ClearFlag(RTC_FLAG_WUTF);
RTC_ClearITPendingBit(RTC_IT_WUT);
  //enable the wakeup interrupt
  RTC_ITConfig(RTC_IT_WUT, ENABLE); //使能唤醒中断
RTC_WakeUpCmd(ENABLE);    //使能唤醒计数器
}

void RTC_WKUP_IRQHandler(void)
{
//printf("frtrtrt");
  if(RTC_GetITStatus(RTC_IT_WUT) != RESET)
  {
RTC_ClearITPendingBit(RTC_IT_WUT);
EXTI_ClearITPendingBit(EXTI_Line20);
//printf("asdf");
  }
}

c2007s · 发表于 2020-11-28 17:16:21

xiaoshigua 发表于 2020-11-30 15:10
打开了，从这句开始数第七行

要在你的主循环里面，进入停止低功耗前打开RTC。

c2007s · 发表于 2020-11-30 08:49:47

RTC_WakeUpCmd(DISABLE); 停止后你打开了吗？？

xiaoshigua · 发表于 2020-11-30 15:10:25

c2007s 发表于 2020-11-30 08:49
RTC_WakeUpCmd(DISABLE); 停止后你打开了吗？？

打开了，从这句开始数第七行

c2007s · 发表于 2020-11-30 22:25:49

xiaoshigua 发表于 2020-11-30 15:10
打开了，从这句开始数第七行

      while(1)
      {
            printf("111");
            /*控制CPU进入stop模式 */

必须在此处重新打开。必须在此处重新打开。必须在此处重新打开。必须在此处重新打开。

            PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
            printf("222");
            /* CPU唤醒后，先停止自动唤醒功能 */
            RTC_WakeUpCmd(DISABLE);
            printf("333");
      }