rtc驱动中的bkp模块起不到防止时间的重新设置

发布于 2018-10-19 10:52:23 浏览：2630 订阅该版

* 本帖最后由 luzixing 于 2018-10-19 11:26 编辑 *

下面是我MX_RTC_Init函数中的一部分代码，通过设置RTC_BKP_DR0起不到防止时间重新设置
```c
   if (HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR0) != 0x33F2)
    {
            RCC_OscInitTypeDef RCC_OscInitStruct;
            RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
                                
            RCC_OscInitStruct.OscillatorType=RCC_OSCILLATORTYPE_LSE;//LSE??
            RCC_OscInitStruct.PLL.PLLState=RCC_PLL_NONE;
            RCC_OscInitStruct.LSEState=RCC_LSE_ON;                  //RTC??LSE
            HAL_RCC_OscConfig(&RCC_OscInitStruct);

PeriphClkInitStruct.PeriphClockSelection=RCC_PERIPHCLK_RTC;//???RTC
           PeriphClkInitStruct.RTCClockSelection=RCC_RTCCLKSOURCE_LSE;//RTC????LSE
           HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
                
           RT_ASSERT(HAL_RTC_Init(&hrtc) == HAL_OK);
                        
        sTime.Hours = 18;
        sTime.Minutes = 14 ;
        sTime.Seconds = 59;
        sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
        sTime.StoreOperation = RTC_STOREOPERATION_RESET;
        RT_ASSERT(HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BIN) == HAL_OK);
        sDate.WeekDay = RTC_WEEKDAY_THURSDAY;
        sDate.Month = RTC_MONTH_OCTOBER;
        sDate.Date = 18;
        sDate.Year = 18;
        RT_ASSERT(HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BIN) == HAL_OK);
                                
       HAL_RTCEx_BKUPWrite(&hrtc, RTC_BKP_DR0, 0x33F2);
    }
```