STM32F030C8T6，想弄一个RTC定时唤醒STOP的例程

lumilu · 发表于 2018-1-18 21:47:36

STM32F030C8T6，想弄一个RTC定时唤醒STOP的例程，不知道怎么弄，以下是RCC的程序
void RTC_Config(void)
{
  RTC_TimeTypeDef RTC_TimeStructure;
  RTC_InitTypeDef RTC_InitStructure;

  /* RTC Configuration **********************************************************/
  /* Enable the PWR clock */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);

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

  /* Reset back up registers */
  RCC_BackupResetCmd(ENABLE);
  RCC_BackupResetCmd(DISABLE);

  /* Enable the LSE */
  RCC_LSEConfig(RCC_LSE_ON);

  /* Wait till LSE is ready */
  while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
  {}

  /* Select the RTC Clock Source */
  RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);

  /* Enable the RTC Clock */
  RCC_RTCCLKCmd(ENABLE);
  /* Wait for RTC APB registers synchronisation */
  RTC_WaitForSynchro();

  /* Set RTC calendar clock to 1 HZ (1 second) */
  RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
  RTC_InitStructure.RTC_AsynchPrediv = 0x7F-1;
  RTC_InitStructure.RTC_SynchPrediv = 0x1fff-1;

  if (RTC_Init(&RTC_InitStructure) == ERROR)
  {
while(1);
  }

  /* Set the time to 01h 00mn 00s AM */
  RTC_TimeStructure.RTC_H12    = RTC_H12_AM;
  RTC_TimeStructure.RTC_Hours = 0x01;
  RTC_TimeStructure.RTC_Minutes = 0x00;
  RTC_TimeStructure.RTC_Seconds = 0x00;

  RTC_SetTime(RTC_Format_BCD, &RTC_TimeStructure);
}

void RTC_AlarmConfig(void)
{
  RTC_TimeTypeDef RTC_TimeStructure;
  RTC_AlarmTypeDef  RTC_AlarmStructure;
  EXTI_InitTypeDef EXTI_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

  /* EXTI configuration */
  EXTI_ClearITPendingBit(EXTI_Line17);//清除外部中断，RTC中断函数里面每次都要清除
  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);

  /* Enable the RTC Alarm Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority=0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_All;
      RTC_SetAlarm(RTC_Format_BCD, RTC_Alarm_A, &RTC_AlarmStructure);
      RTC_AlarmSubSecondConfig(RTC_Alarm_A, 0xFF, RTC_AlarmSubSecondMask_SS14_8);

/* Get current time */
RTC_GetTime(RTC_Format_BIN, &RTC_TimeStructure);

  /* Enable the RTC Alarm A interrupt */
  RTC_ITConfig(RTC_IT_ALRA, ENABLE);

  /* Enable the alarm */
  RTC_AlarmCmd(RTC_Alarm_A, ENABLE);

  /* Clear the Alarm A Pending Bit */
  RTC_ClearITPendingBit(RTC_IT_ALRA);

}

以下问问饿你中断函数
void  RTC_IRQHandler(void)
{
  if (RTC_GetITStatus(RTC_IT_ALRA) != RESET)
  {
   /* Clear the Alarm A Pending Bit */
   RTC_ClearITPendingBit(RTC_IT_ALRA);


         temp1++;

}
            EXTI_ClearITPendingBit(EXTI_Line17);

}

lumilu · 发表于 2018-1-18 21:47:37

自己顶一个，这个问题已经解决，就是RTC定时不太准确，能进入STOP模式，中断也可唤醒

lumilu · 发表于 2018-1-18 21:47:37

按照程序， temp1应该是32秒左右自加一个数，但实际上是1秒加一个数，不知道哪里出问题了，有人说RTC定时唤醒STOP模式需要RTCAlarm_IRQHandler() 中断，但是STM32F030C8T6没有这个中断函数，怎么办？

lumilu · 发表于 2018-1-18 21:50:25

i nt main(void) { RCC1_Configuration(); RTC_Config(); RTC_AlarmConfig(); while(1) { RTC_AlarmConfig(); PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI); RTC_ITConfig(RTC_IT_ALRA, DISABLE); RTC_AlarmCmd(RTC_Alarm_A, DISABLE); } }