使用CubeMX库解决STM32L151低功耗RTC唤醒

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刘明

2018-12-20 09:11:06

RTC配置代码
void MX_RTC_Init(void)
{
  RTC_TimeTypeDef sTime;
  RTC_DateTypeDef sDate;

/**Initialize RTC Only
*/
  hrtc.Instance = RTC;
  hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
  hrtc.Init.AsynchPrediv = 99;
  hrtc.Init.SynchPrediv = 369;
  hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
  hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
  hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
  if (HAL_RTC_Init(&hrtc) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }

/**Initialize RTC and set the Time and Date
*/
  if(HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR0) != 0x32F2){
  sTime.Hours = 0x9;
  sTime.Minutes = 0x30;
  sTime.Seconds = 0x30;
  sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
  sTime.StoreOperation = RTC_STOREOPERATION_RESET;
  if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BCD) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }

  sDate.WeekDay = RTC_WEEKDAY_MONDAY;
  sDate.Month = RTC_MONTH_JANUARY;
  sDate.Date = 0x1;
  sDate.Year = 0x0;

  if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BCD) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }

HAL_RTCEx_BKUPWrite(&hrtc,RTC_BKP_DR0,0x32F2);
  }
/**Enable the WakeUp
*/
  if (HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 8200, RTC_WAKEUPCLOCK_RTCCLK_DIV16) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }

}