STM32F103的RTC HAL库有问题吗？

lmn2005

近两天用STM32F103C6T6A制作一个电子钟，用STM32CubeMX生成工程后，直接用HAL库中的设定日期时间的函数来初始化时间。

初始化时间开始的时候，读取的日期和时间都是正确的，但当系统复位或主电源断电后，读取的时间是正确的，但读取的日期就变成了0年1月1日。VBAT电源是正常的。
HAL中设定日期和读取日期的函数如下：

1. /**
   
2.   * [url=home.php?mod=space&uid=650075]@brief[/url]  Sets RTC current date.
   
3.   * @param  hrtc   pointer to a RTC_HandleTypeDef structure that contains
   
4.   *                the configuration information for RTC.
   
5.   * @param  sDate: Pointer to date structure
   
6.   * @param  Format: specifies the format of the entered parameters.
   
7.   *          This parameter can be one of the following values:
   
8.   *            @arg RTC_FORMAT_BIN: Binary data format
   
9.   *            @arg RTC_FORMAT_BCD: BCD data format
   
10.   * @retval HAL status
    
11.   */
    
12. HAL_StatusTypeDef HAL_RTC_SetDate(RTC_HandleTypeDef *hrtc, RTC_DateTypeDef *sDate, uint32_t Format)
    
13. {
    
14.   uint32_t counter_time = 0U, counter_alarm = 0U, hours = 0U;
    
15. 
    
16.   /* Check input parameters */
    
17.   if ((hrtc == NULL) || (sDate == NULL))
    
18.   {
    
19.     return HAL_ERROR;
    
20.   }
    
21. 
    
22.   /* Check the parameters */
    
23.   assert_param(IS_RTC_FORMAT(Format));
    
24. 
    
25.   /* Process Locked */
    
26.   __HAL_LOCK(hrtc);
    
27. 
    
28.   hrtc->State = HAL_RTC_STATE_BUSY;
    
29. 
    
30.   if (Format == RTC_FORMAT_BIN)
    
31.   {
    
32.     assert_param(IS_RTC_YEAR(sDate->Year));
    
33.     assert_param(IS_RTC_MONTH(sDate->Month));
    
34.     assert_param(IS_RTC_DATE(sDate->Date));
    
35. 
    
36.     /* Change the current date */
    
37.     hrtc->DateToUpdate.Year  = sDate->Year;
    
38.     hrtc->DateToUpdate.Month = sDate->Month;
    
39.     hrtc->DateToUpdate.Date  = sDate->Date;
    
40.   }
    
41.   else
    
42.   {
    
43.     assert_param(IS_RTC_YEAR(RTC_Bcd2ToByte(sDate->Year)));
    
44.     assert_param(IS_RTC_MONTH(RTC_Bcd2ToByte(sDate->Month)));
    
45.     assert_param(IS_RTC_DATE(RTC_Bcd2ToByte(sDate->Date)));
    
46. 
    
47.     /* Change the current date */
    
48.     hrtc->DateToUpdate.Year  = RTC_Bcd2ToByte(sDate->Year);
    
49.     hrtc->DateToUpdate.Month = RTC_Bcd2ToByte(sDate->Month);
    
50.     hrtc->DateToUpdate.Date  = RTC_Bcd2ToByte(sDate->Date);
    
51.   }
    
52. 
    
53.   /* WeekDay set by user can be ignored because automatically calculated */
    
54.   hrtc->DateToUpdate.WeekDay = RTC_WeekDayNum(hrtc->DateToUpdate.Year, hrtc->DateToUpdate.Month, hrtc->DateToUpdate.Date);
    
55.   sDate->WeekDay = hrtc->DateToUpdate.WeekDay;
    
56. 
    
57.   /* Reset time to be aligned on the same day */
    
58.   /* Read the time counter*/
    
59.   counter_time = RTC_ReadTimeCounter(hrtc);
    
60. 
    
61.   /* Fill the structure fields with the read parameters */
    
62.   hours = counter_time / 3600U;
    
63.   if (hours > 24U)
    
64.   {
    
65.     /* Set updated time in decreasing counter by number of days elapsed */
    
66.     counter_time -= ((hours / 24U) * 24U * 3600U);
    
67.     /* Write time counter in RTC registers */
    
68.     if (RTC_WriteTimeCounter(hrtc, counter_time) != HAL_OK)
    
69.     {
    
70.       /* Set RTC state */
    
71.       hrtc->State = HAL_RTC_STATE_ERROR;
    
72. 
    
73.       /* Process Unlocked */
    
74.       __HAL_UNLOCK(hrtc);
    
75. 
    
76.       return HAL_ERROR;
    
77.     }
    
78. 
    
79.     /* Read current Alarm counter in RTC registers */
    
80.     counter_alarm = RTC_ReadAlarmCounter(hrtc);
    
81. 
    
82.     /* Set again alarm to match with new time if enabled */
    
83.     if (counter_alarm != RTC_ALARM_RESETVALUE)
    
84.     {
    
85.       if (counter_alarm < counter_time)
    
86.       {
    
87.         /* Add 1 day to alarm counter*/
    
88.         counter_alarm += (uint32_t)(24U * 3600U);
    
89. 
    
90.         /* Write new Alarm counter in RTC registers */
    
91.         if (RTC_WriteAlarmCounter(hrtc, counter_alarm) != HAL_OK)
    
92.         {
    
93.           /* Set RTC state */
    
94.           hrtc->State = HAL_RTC_STATE_ERROR;
    
95. 
    
96.           /* Process Unlocked */
    
97.           __HAL_UNLOCK(hrtc);
    
98. 
    
99.           return HAL_ERROR;
    
100.         }
     
101.       }
     
102.     }
     
103. 
     
104. 
     
105.   }
     
106. 
     
107.   hrtc->State = HAL_RTC_STATE_READY ;
     
108. 
     
109.   /* Process Unlocked */
     
110.   __HAL_UNLOCK(hrtc);
     
111. 
     
112.   return HAL_OK;
     
113. }
     
114. 
     
115. /**
     
116.   * @brief  Gets RTC current date.
     
117.   * @param  hrtc   pointer to a RTC_HandleTypeDef structure that contains
     
118.   *                the configuration information for RTC.
     
119.   * @param  sDate: Pointer to Date structure
     
120.   * @param  Format: Specifies the format of the entered parameters.
     
121.   *          This parameter can be one of the following values:
     
122.   *            @arg RTC_FORMAT_BIN:  Binary data format
     
123.   *            @arg RTC_FORMAT_BCD:  BCD data format
     
124.   * @retval HAL status
     
125.   */
     
126. HAL_StatusTypeDef HAL_RTC_GetDate(RTC_HandleTypeDef *hrtc, RTC_DateTypeDef *sDate, uint32_t Format)
     
127. {
     
128.   RTC_TimeTypeDef stime = {0U};
     
129. 
     
130.   /* Check input parameters */
     
131.   if ((hrtc == NULL) || (sDate == NULL))
     
132.   {
     
133.     return HAL_ERROR;
     
134.   }
     
135. 
     
136.   /* Check the parameters */
     
137.   assert_param(IS_RTC_FORMAT(Format));
     
138. 
     
139.   /* Call HAL_RTC_GetTime function to update date if counter higher than 24 hours */
     
140.   if (HAL_RTC_GetTime(hrtc, &stime, RTC_FORMAT_BIN) != HAL_OK)
     
141.   {
     
142.     return HAL_ERROR;
     
143.   }
     
144. 
     
145.   /* Fill the structure fields with the read parameters */
     
146.   sDate->WeekDay  = hrtc->DateToUpdate.WeekDay;
     
147.   sDate->Year     = hrtc->DateToUpdate.Year;
     
148.   sDate->Month    = hrtc->DateToUpdate.Month;
     
149.   sDate->Date     = hrtc->DateToUpdate.Date;
     
150. 
     
151.   /* Check the input parameters format */
     
152.   if (Format != RTC_FORMAT_BIN)
     
153.   {
     
154.     /* Convert the date structure parameters to BCD format */
     
155.     sDate->Year   = (uint8_t)RTC_ByteToBcd2(sDate->Year);
     
156.     sDate->Month  = (uint8_t)RTC_ByteToBcd2(sDate->Month);
     
157.     sDate->Date   = (uint8_t)RTC_ByteToBcd2(sDate->Date);
     
158.   }
     
159.   return HAL_OK;
     
160. }
     

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请各位大神支招，这问题该如何解决？

mmxx2015

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lmn2005

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