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STM32F103ZET6 RTC DATE BACKUP NOT WORK.

Question asked by young su cho on Jun 13, 2017

Hello.

I have a question about RTC BATTERY BACK UP.

 

I am using RTC. And an external battery.

 

When the power is ON / OFF, the RTC TIME backup function works well.


However, RTC_DATE is not backed up.

 

How to solve the problem please let me know.

 

Below is the battery schematic and c source.

 

 

 

static void MX_RTC_Init(void)
{

  RTC_TimeTypeDef sTime;
  RTC_DateTypeDef DateToUpdate;

    /**Initialize RTC Only
    */
  hrtc.Instance = RTC;
  hrtc.Init.AsynchPrediv = RTC_AUTO_1_SECOND;
  hrtc.Init.OutPut = RTC_OUTPUTSOURCE_ALARM;
  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_DR1) != 0x32F2){
  sTime.Hours = 0x1;
  sTime.Minutes = 0x0;
  sTime.Seconds = 0x0;

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

  DateToUpdate.WeekDay = RTC_WEEKDAY_MONDAY;
  DateToUpdate.Month = RTC_MONTH_JANUARY;
  DateToUpdate.Date = 0x6;
  DateToUpdate.Year = 0x17;

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

    HAL_RTCEx_BKUPWrite(&hrtc,RTC_BKP_DR1,0x32F2);
  }

}

 

/* Private variables ---------------------------------------------------------*/
RTC_DateTypeDef Brams_RTC_Date;
RTC_TimeTypeDef Brams_RTC_Time;

 

void RTC_TimeShow(void)
{
  HAL_RTC_GetTime(&hrtc, &Brams_RTC_Time, RTC_FORMAT_BIN);
  HAL_RTC_GetDate(&hrtc, &Brams_RTC_Date, RTC_FORMAT_BIN);
 printf("\r\n- Date : 20%02d/%02d/%02d",Brams_RTC_Date.Year, Brams_RTC_Date.Month, Brams_RTC_Date.Date);
  printf("\r\n- Time : %02d:%02d:%02d ",Brams_RTC_Time.Hours, Brams_RTC_Time.Minutes, Brams_RTC_Time.Seconds);
}

 

 

 

 

 

 

 

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