问题：

STM32F1中RTC 不像 F4中，是一个单独模块。其就是一个计数器，查看HAL库中时间和日期的设置发现，在日期设置的时候，HAL库并没有将日期换算为计数器的值。

库源码如下

日期设置：

HAL_StatusTypeDef HAL_RTC_SetTime(RTC_HandleTypeDef *hrtc, RTC_TimeTypeDef *sTime, uint32_t Format)
{
  uint32_t counter_time = 0U, counter_alarm = 0U;
  
  /* Check input parameters */
  if((hrtc == NULL) || (sTime == NULL))
  {
     return HAL_ERROR;
  }
  
 /* Check the parameters */
  assert_param(IS_RTC_FORMAT(Format));
  
  /* Process Locked */ 
  __HAL_LOCK(hrtc);
  
  hrtc->State = HAL_RTC_STATE_BUSY;
  
  if(Format == RTC_FORMAT_BIN)
  {
    assert_param(IS_RTC_HOUR24(sTime->Hours));
    assert_param(IS_RTC_MINUTES(sTime->Minutes));
    assert_param(IS_RTC_SECONDS(sTime->Seconds));


    counter_time = (uint32_t)(((uint32_t)sTime->Hours * 3600U) + \   //HAL库这里计算的时间，后面写入计数器的
                        ((uint32_t)sTime->Minutes * 60U) + \                         //也就是这个值
                        ((uint32_t)sTime->Seconds));  
  }
  else
  {
    assert_param(IS_RTC_HOUR24(RTC_Bcd2ToByte(sTime->Hours)));
    assert_param(IS_RTC_MINUTES(RTC_Bcd2ToByte(sTime->Minutes)));
    assert_param(IS_RTC_SECONDS(RTC_Bcd2ToByte(sTime->Seconds)));


    counter_time = (((uint32_t)(RTC_Bcd2ToByte(sTime->Hours)) * 3600U) + \
              ((uint32_t)(RTC_Bcd2ToByte(sTime->Minutes)) * 60U) + \
              ((uint32_t)(RTC_Bcd2ToByte(sTime->Seconds))));   
  }


  /* Write time counter in RTC registers */
  if (RTC_WriteTimeCounter(hrtc, counter_time) != HAL_OK)  //更新计数器，并没设计到日期
  {
    /* Set RTC state */
    hrtc->State = HAL_RTC_STATE_ERROR;
    
    /* Process Unlocked */ 
    __HAL_UNLOCK(hrtc);
    
    return HAL_ERROR;
  }
  else
  {
    /* Clear Second and overflow flags */
    CLEAR_BIT(hrtc->Instance->CRL, (RTC_FLAG_SEC | RTC_FLAG_OW));
    
    /* Read current Alarm counter in RTC registers */
    counter_alarm = RTC_ReadAlarmCounter(hrtc);


    /* Set again alarm to match with new time if enabled */
    if (counter_alarm != RTC_ALARM_RESETVALUE)
    {
      if(counter_alarm < counter_time)
      {
        /* Add 1 day to alarm counter*/
        counter_alarm += (uint32_t)(24U * 3600U);
        
        /* Write new Alarm counter in RTC registers */
        if (RTC_WriteAlarmCounter(hrtc, counter_alarm) != HAL_OK)
        {
          /* Set RTC state */
          hrtc->State = HAL_RTC_STATE_ERROR;
          
          /* Process Unlocked */ 
          __HAL_UNLOCK(hrtc);
          
          return HAL_ERROR;
        }
      }
    }
    
    hrtc->State = HAL_RTC_STATE_READY;
  
   __HAL_UNLOCK(hrtc); 
     
   return HAL_OK;
  }

}

HAL日期设置：

HAL_StatusTypeDef HAL_RTC_GetTime(RTC_HandleTypeDef *hrtc, RTC_TimeTypeDef *sTime, uint32_t Format)
{
  uint32_t counter_time = 0U, counter_alarm = 0U, days_elapsed = 0U, hours = 0U;
  
  /* Check input parameters */
  if((hrtc == NULL) || (sTime == NULL))
  {
     return HAL_ERROR;
  }