关于STM32L476 HAL时间会减少1小时问题？

hunts

目前L476　RTC的情况：
在１０点前，设置时间和读取时间一致，１０－２３点之间，会自动减一。目前是１０点多，读取出来就变成９点多。
０～９点设置和读取时间一致。

是我使用的方法不对，还是配置有什么讲究。谢谢!

正点原子

帮顶

jiangyy

1. /**
   
2.   ******************************************************************************
   
3.   * File Name          : RTC.c
   
4.   * Description        : This file provides code for the configuration
   
5.   *                      of the RTC instances.
   
6.   ******************************************************************************
   
7.   * @attention
   
8.   *
   
9.   * <h2><center>&#169; Copyright (c) 2020 STMicroelectronics.
   
10.   * All rights reserved.</center></h2>
    
11.   *
    
12.   * This software component is licensed by ST under Ultimate Liberty license
    
13.   * SLA0044, the "License"; You may not use this file except in compliance with
    
14.   * the License. You may obtain a copy of the License at:
    
15.   *                             www.st.com/SLA0044
    
16.   *
    
17.   ******************************************************************************
    
18.   */
    
19. 
    
20. /* Includes ------------------------------------------------------------------*/
    
21. #include "rtc.h"
    
22. 
    
23. /* USER CODE BEGIN 0 */
    
24. 
    
25. /* USER CODE END 0 */
    
26. 
    
27. RTC_HandleTypeDef hrtc;
    
28. 
    
29. /* RTC init function */
    
30. void MX_RTC_Init(void)
    
31. {
    
32.   RTC_TimeTypeDef sTime = {0};
    
33.   RTC_DateTypeDef sDate = {0};
    
34. 
    
35.   /** Initialize RTC Only
    
36.   */
    
37.   hrtc.Instance = RTC;
    
38.   hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
    
39.   hrtc.Init.AsynchPrediv = 127;
    
40.   hrtc.Init.SynchPrediv = 255;
    
41.   hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
    
42.   hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
    
43.   hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
    
44.   if (HAL_RTC_Init(&hrtc) != HAL_OK)
    
45.   {
    
46.     Error_Handler();
    
47.   }
    
48. 
    
49.   /* USER CODE BEGIN Check_RTC_BKUP */
    
50. 
    
51.         if(HAL_RTCEx_BKUPRead(&hrtc,RTC_BKP_DR0) == 0x5050)//是否第一次配置？
    
52.         {
    
53.           return;
    
54.         }
    
55.         HAL_RTCEx_BKUPWrite(&hrtc,RTC_BKP_DR0,0x5050);//标记已经初始化过
    
56.   /* USER CODE END Check_RTC_BKUP */
    
57. 
    
58.   /** Initialize RTC and set the Time and Date
    
59.   */
    
60.   sTime.Hours = 11;
    
61.   sTime.Minutes = 11;
    
62.   sTime.Seconds = 11;
    
63.   sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
    
64.   sTime.StoreOperation = RTC_STOREOPERATION_RESET;
    
65.   if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BIN) != HAL_OK)
    
66.   {
    
67.     Error_Handler();
    
68.   }
    
69.   sDate.WeekDay = RTC_WEEKDAY_WEDNESDAY;
    
70.   sDate.Month = RTC_MONTH_NOVEMBER;
    
71.   sDate.Date = 11;
    
72.   sDate.Year = 20;
    
73. 
    
74.   if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BIN) != HAL_OK)
    
75.   {
    
76.     Error_Handler();
    
77.   }
    
78. 
    
79. }
    
80. 
    
81. void HAL_RTC_MspInit(RTC_HandleTypeDef* rtcHandle)
    
82. {
    
83. 
    
84.   if(rtcHandle->Instance==RTC)
    
85.   {
    
86.   /* USER CODE BEGIN RTC_MspInit 0 */
    
87. 
    
88.   /* USER CODE END RTC_MspInit 0 */
    
89.     /* RTC clock enable */
    
90.     __HAL_RCC_RTC_ENABLE();
    
91.   /* USER CODE BEGIN RTC_MspInit 1 */
    
92. 
    
93.   /* USER CODE END RTC_MspInit 1 */
    
94.   }
    
95. }
    
96. 
    
97. void HAL_RTC_MspDeInit(RTC_HandleTypeDef* rtcHandle)
    
98. {
    
99. 
    
100.   if(rtcHandle->Instance==RTC)
     
101.   {
     
102.   /* USER CODE BEGIN RTC_MspDeInit 0 */
     
103. 
     
104.   /* USER CODE END RTC_MspDeInit 0 */
     
105.     /* Peripheral clock disable */
     
106.     __HAL_RCC_RTC_DISABLE();
     
107.   /* USER CODE BEGIN RTC_MspDeInit 1 */
     
108. 
     
109.   /* USER CODE END RTC_MspDeInit 1 */
     
110.   }
     
111. }
     
112. 
     
113. /* USER CODE BEGIN 1 */
     
114. 
     
115. /* USER CODE END 1 */
     
116. 
     
117. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
     

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