diff --git a/Firmware/Core/Src/rtc.c b/Firmware/Core/Src/rtc.c
index 0ddfc0f..1beecfe 100644
--- a/Firmware/Core/Src/rtc.c
+++ b/Firmware/Core/Src/rtc.c
@@ -27,8 +27,7 @@
 RTC_HandleTypeDef hrtc;
 
 /* RTC init function */
-void MX_RTC_Init(void)
-{
+void MX_RTC_Init(void) {
 
   /* USER CODE BEGIN RTC_Init 0 */
 
@@ -46,13 +45,22 @@ void MX_RTC_Init(void)
   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();
+  if (HAL_RTC_Init(&hrtc) != HAL_OK) {
+	Error_Handler();
   }
 
   /* USER CODE BEGIN Check_RTC_BKUP */
+  __HAL_RTC_SECOND_ENABLE_IT(&hrtc, RTC_IT_SEC);
+  if (HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR1) == 0x1234) {
+	//  从备份寄存器还原日期
+	hrtc.DateToUpdate.Year = HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR2);
+	hrtc.DateToUpdate.Month = HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR3);
+	hrtc.DateToUpdate.Date = HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR4);
+	//  把RTC计数单元的计数值更新到日期
+	HAL_RTC_GetTime(&hrtc, &sTime, RTC_FORMAT_BIN);
 
+	return;
+  }
   /* USER CODE END Check_RTC_BKUP */
 
   /** Initialize RTC and set the Time and Date
@@ -61,67 +69,61 @@ void MX_RTC_Init(void)
   sTime.Minutes = 0;
   sTime.Seconds = 0;
 
-  if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BIN) != HAL_OK)
-  {
-    Error_Handler();
+  if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BIN) != HAL_OK) {
+	Error_Handler();
   }
   DateToUpdate.WeekDay = RTC_WEEKDAY_MONDAY;
   DateToUpdate.Month = RTC_MONTH_JANUARY;
   DateToUpdate.Date = 1;
   DateToUpdate.Year = 0;
 
-  if (HAL_RTC_SetDate(&hrtc, &DateToUpdate, RTC_FORMAT_BIN) != HAL_OK)
-  {
-    Error_Handler();
+  if (HAL_RTC_SetDate(&hrtc, &DateToUpdate, RTC_FORMAT_BIN) != HAL_OK) {
+	Error_Handler();
   }
   /* USER CODE BEGIN RTC_Init 2 */
-
+  HAL_RTCEx_BKUPWrite(&hrtc,RTC_BKP_DR1,0x1234);
   /* USER CODE END RTC_Init 2 */
 
 }
 
-void HAL_RTC_MspInit(RTC_HandleTypeDef* rtcHandle)
-{
+void HAL_RTC_MspInit(RTC_HandleTypeDef *rtcHandle) {
 
-  if(rtcHandle->Instance==RTC)
-  {
-  /* USER CODE BEGIN RTC_MspInit 0 */
+  if (rtcHandle->Instance == RTC) {
+	/* USER CODE BEGIN RTC_MspInit 0 */
 
-  /* USER CODE END RTC_MspInit 0 */
-    HAL_PWR_EnableBkUpAccess();
-    /* Enable BKP CLK enable for backup registers */
-    __HAL_RCC_BKP_CLK_ENABLE();
-    /* RTC clock enable */
-    __HAL_RCC_RTC_ENABLE();
+	/* USER CODE END RTC_MspInit 0 */
+	HAL_PWR_EnableBkUpAccess();
+	/* Enable BKP CLK enable for backup registers */
+	__HAL_RCC_BKP_CLK_ENABLE();
+	/* RTC clock enable */
+	__HAL_RCC_RTC_ENABLE();
 
-    /* RTC interrupt Init */
-    HAL_NVIC_SetPriority(RTC_IRQn, 3, 0);
-    HAL_NVIC_EnableIRQ(RTC_IRQn);
-    HAL_NVIC_SetPriority(RTC_Alarm_IRQn, 3, 0);
-    HAL_NVIC_EnableIRQ(RTC_Alarm_IRQn);
-  /* USER CODE BEGIN RTC_MspInit 1 */
+	/* RTC interrupt Init */
+	HAL_NVIC_SetPriority(RTC_IRQn, 3, 0);
+	HAL_NVIC_EnableIRQ(RTC_IRQn);
+	HAL_NVIC_SetPriority(RTC_Alarm_IRQn, 3, 0);
+	HAL_NVIC_EnableIRQ(RTC_Alarm_IRQn);
+	/* USER CODE BEGIN RTC_MspInit 1 */
 
-  /* USER CODE END RTC_MspInit 1 */
+	/* USER CODE END RTC_MspInit 1 */
   }
 }
 
-void HAL_RTC_MspDeInit(RTC_HandleTypeDef* rtcHandle)
-{
+void HAL_RTC_MspDeInit(RTC_HandleTypeDef *rtcHandle) {
 
-  if(rtcHandle->Instance==RTC)
-  {
-  /* USER CODE BEGIN RTC_MspDeInit 0 */
+  if (rtcHandle->Instance == RTC) {
+	/* USER CODE BEGIN RTC_MspDeInit 0 */
 
-  /* USER CODE END RTC_MspDeInit 0 */
-    /* Peripheral clock disable */
-    __HAL_RCC_RTC_DISABLE();
+	/* USER CODE END RTC_MspDeInit 0 */
+	/* Peripheral clock disable */
+	__HAL_RCC_RTC_DISABLE();
 
-    /* RTC interrupt Deinit */
-    HAL_NVIC_DisableIRQ(RTC_IRQn);
-    HAL_NVIC_DisableIRQ(RTC_Alarm_IRQn);
-  /* USER CODE BEGIN RTC_MspDeInit 1 */
+	/* RTC interrupt Deinit */
+	HAL_NVIC_DisableIRQ(RTC_IRQn);
+	HAL_NVIC_DisableIRQ(RTC_Alarm_IRQn);
+	/* USER CODE BEGIN RTC_MspDeInit 1 */
 
-  /* USER CODE END RTC_MspDeInit 1 */
+	/* USER CODE END RTC_MspDeInit 1 */
   }
 }