stm32 f103 停机模式rtc和gpio中断唤醒reset按键复位后失效

2万 · 2021-2-23 15:39

复位后无论是rtc闹钟还是gpio都唤醒不了了..
static void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;


  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

  NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

      NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);
      NVIC_InitStructure.NVIC_IRQChannel = RTCAlarm_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

}

void EXTI_Key_Config(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;
      EXTI_InitTypeDef EXTI_InitStructure;


      RCC_APB2PeriphclockCmd(RCC_APB2Periph_GPIOC  |RCC_APB2Periph_GPIOA| RCC_APB2Periph_AFIO,ENABLE);


      NVIC_Configuration();


  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOC, &GPIO_InitStructure);



  GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource13);

  EXTI_InitStructure.EXTI_Line = EXTI_Line13;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_trigger = EXTI_Trigger_Falling;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);


      EXTI_InitStructure.EXTI_Line = EXTI_Line17;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd =ENABLE;
EXTI_Init(&EXTI_InitStructure);

}

void RTC_Configuration(void)
{

      RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);


      PWR_BackupAccessCmd(ENABLE);


      BKP_DeInit();


      RCC_LSEConfig(RCC_LSE_ON);


      while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
      {}


      RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);


      RCC_RTCCLKCmd(ENABLE);


      RTC_WaitForSynchro();


      RTC_WaitForLastTask();


      RTC_ITConfig(RTC_IT_SEC, ENABLE);


      RTC_WaitForLastTask();


      RTC_SetPrescaler(32767);


      RTC_WaitForLastTask();



}

void RTC_CheckAndConfig(void)
{

      if (BKP_ReadBackupRegister(BKP_DR1) != 0xA5A5)
      {

            RTC_Configuration();


      RTC_SetCounter(0);
      RTC_WaitForLastTask();



            RTC_SET_ALARM(10);
            BKP_WriteBackupRegister(BKP_DR1, 0xA5A5);
      }
      else
      {

            RTC_WaitForSynchro();


            RTC_ITConfig(RTC_IT_SEC, ENABLE);


            RTC_WaitForLastTask();
      }

      RCC_CleaRFlag();

}

void RTC_SET_ALARM(u32 sec)
{
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
      PWR_BackupAccessCmd(ENABLE);

RTC_SetAlarm(RTC_GetCounter()+sec);

RTC_WaitForLastTask();

RTC_ITConfig(RTC_FLAG_ALR,ENABLE);




}

void SYSCLKConfig_STOP(void)
{

  RCC_HSEConfig(RCC_HSE_ON);


  while (RCC_GetFlagStatus(RCC_FLAG_HSERDY) == RESET)
  {
  }


  RCC_PLLCmd(ENABLE);


  while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
  {
  }


  RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);


  while (RCC_GetSYSCLKSource() != 0x08)
  {
  }

}

      中断
void KEY2_IRQHandler(void)
{

      if(EXTI_GetITStatus(EXTI_Line13) != RESET)
      {



            EXTI_ClearITPendingBit(EXTI_Line13);

         SYSCLKConfig_STOP();
      }
}

void RTC_IRQHandler(void)
{
      if (RTC_GetITStatus(RTC_IT_SEC) != RESET)
      {

         RTC_ClearITPendingBit(RTC_IT_SEC);

         RTC_WaitForLastTask();
      }
}

void RTCAlarm_IRQHandler(void)
{
      if(RTC_GetITStatus(RTC_IT_ALR)!= RESET)//ÄÖÖóÖD¶Ï
      {
            SYSCLKConfig_STOP();


      RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, DISABLE);
            RTC_SetCounter(0);
      RTC_WaitForLastTask();
RTC_SET_ALARM(5);
            BKP_WriteBackupRegister(BKP_DR1, 0xA5A5);
            RTC_ClearITPendingBit(RTC_IT_ALR);
      EXTI_ClearITPendingBit(EXTI_Line17);
            RTC_WaitForLastTask();
  }

}

主函数
int main()
{

      //LED初始化
      LED_GPIO_Config( );



      while(1)
      {



            RTC_CheckAndConfig();
      EXTI_Key_Config();




                              SysTick_Delay_Ms(50);
                              LED2_ON;

            SysTick_Delay_Ms(500);

                                 LED2_OFF;

PWR_EnterSTOPMode(PWR_Regulator_LowPower,PWR_STOPEntry_WFI);



      }

}