From a7c293fac078946ba544204a3fe67d930bdc82b7 Mon Sep 17 00:00:00 2001
From: tyustli <1225613647@qq.com>
Date: Tue, 12 May 2020 14:08:24 +0800
Subject: [PATCH] [bsp] fix stm32 f1 series rtc bug

---
 bsp/stm32/libraries/HAL_Drivers/drv_rtc.c | 62 ++++++++++++++++++++---
 1 file changed, 55 insertions(+), 7 deletions(-)

diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_rtc.c b/bsp/stm32/libraries/HAL_Drivers/drv_rtc.c
index f62ed0b8f0..380cce7624 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_rtc.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_rtc.c
@@ -12,13 +12,6 @@
 
 #ifdef BSP_USING_ONCHIP_RTC
 
-
-#ifndef HAL_RTCEx_BKUPRead
-#define HAL_RTCEx_BKUPRead(x1, x2) (~BKUP_REG_DATA)
-#endif
-#ifndef HAL_RTCEx_BKUPWrite
-#define HAL_RTCEx_BKUPWrite(x1, x2, x3)
-#endif
 #ifndef RTC_BKP_DR1
 #define RTC_BKP_DR1 RT_NULL
 #endif
@@ -33,6 +26,16 @@ static struct rt_device rtc;
 
 static RTC_HandleTypeDef RTC_Handler;
 
+RT_WEAK uint32_t HAL_RTCEx_BKUPRead(RTC_HandleTypeDef *hrtc, uint32_t BackupRegister)
+{
+    return (~BKUP_REG_DATA);
+}
+
+RT_WEAK void HAL_RTCEx_BKUPWrite(RTC_HandleTypeDef *hrtc, uint32_t BackupRegister, uint32_t Data)
+{
+    return;
+}
+
 static time_t get_rtc_timestamp(void)
 {
     RTC_TimeTypeDef RTC_TimeStruct = {0};
@@ -84,6 +87,13 @@ static rt_err_t set_rtc_time_stamp(time_t time_stamp)
 
     LOG_D("set rtc time.");
     HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR1, BKUP_REG_DATA);
+#ifdef SOC_SERIES_STM32F1
+    HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR2, RTC_DateStruct.Year);
+    HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR3, RTC_DateStruct.Month);
+    HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR4, RTC_DateStruct.Date);
+    HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR5, RTC_DateStruct.WeekDay);
+#endif
+
     return RT_EOK;
 }
 
@@ -108,6 +118,27 @@ static void rt_rtc_init(void)
     HAL_RCC_OscConfig(&RCC_OscInitStruct);
 }
 
+#ifdef SOC_SERIES_STM32F1
+/* update RTC_BKP_DRx*/
+static void rt_rtc_bkp_update(void)
+{
+    RTC_DateTypeDef RTC_DateStruct = {0};
+
+    HAL_PWR_EnableBkUpAccess();
+    __HAL_RCC_BKP_CLK_ENABLE();
+
+    HAL_RTC_GetDate(&RTC_Handler, &RTC_DateStruct, RTC_FORMAT_BIN);
+    if (HAL_RTCEx_BKUPRead(&RTC_Handler, RTC_BKP_DR4) != RTC_DateStruct.Date)
+    {
+        HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR1, BKUP_REG_DATA);
+        HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR2, RTC_DateStruct.Year);
+        HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR3, RTC_DateStruct.Month);
+        HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR4, RTC_DateStruct.Date);
+        HAL_RTCEx_BKUPWrite(&RTC_Handler, RTC_BKP_DR5, RTC_DateStruct.WeekDay);
+    }
+}
+#endif
+
 static rt_err_t rt_rtc_config(struct rt_device *dev)
 {
     RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
@@ -167,6 +198,23 @@ static rt_err_t rt_rtc_config(struct rt_device *dev)
             return -RT_ERROR;
         }
     }
+#ifdef SOC_SERIES_STM32F1
+    else
+    {
+        RTC_DateTypeDef RTC_DateStruct = {0};
+
+        RTC_DateStruct.Year    = HAL_RTCEx_BKUPRead(&RTC_Handler, RTC_BKP_DR2);
+        RTC_DateStruct.Month   = HAL_RTCEx_BKUPRead(&RTC_Handler, RTC_BKP_DR3);
+        RTC_DateStruct.Date    = HAL_RTCEx_BKUPRead(&RTC_Handler, RTC_BKP_DR4);
+        RTC_DateStruct.WeekDay = HAL_RTCEx_BKUPRead(&RTC_Handler, RTC_BKP_DR5);
+        if (HAL_RTC_SetDate(&RTC_Handler, &RTC_DateStruct, RTC_FORMAT_BIN) != HAL_OK)
+        {
+            Error_Handler();
+        }
+        rt_rtc_bkp_update();
+    }
+#endif
+
     return RT_EOK;
 }