Merge pull request #19 from arduino/rtc-clock

Don't clock RTC in bootloader

Author: pennam

app/rtc/rtc.c

@@ -24,40 +24,8 @@
 RTC_HandleTypeDef RtcHandle;
 static int rtc_initialized = 0;
 
-
-void HAL_RTC_MspInit(RTC_HandleTypeDef *hrtc)
-{
-  RCC_OscInitTypeDef        RCC_OscInitStruct;
-  RCC_PeriphCLKInitTypeDef  PeriphClkInitStruct;
-
-  /*##-1- Configure LSE as RTC clock source ##################################*/
-  RCC_OscInitStruct.OscillatorType =  RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
-  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
-  RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
-  RCC_OscInitStruct.LSIState = RCC_LSI_ON;
-  if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
-  {
-    return;
-  }
-
-  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
-  PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
-  if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
-  {
-    return;
-  }
-
-  /*##-2- Enable RTC peripheral Clocks #######################################*/
-  /* Enable RTC Clock */
-  __HAL_RCC_RTC_ENABLE();
-}
-
-#define RTC_ASYNCH_PREDIV  0x7F   /* LSE as RTC clock */
-#define RTC_SYNCH_PREDIV   0x00FF /* LSE as RTC clock */
-
-void RTC_CalendarBkupInit(void)
+void RTC_Bkp_Init(void)
 {
-
   /*##-1- Configure the RTC peripheral #######################################*/
   /* Configure RTC prescaler and RTC data registers */
   /* RTC configured as follow:
@@ -68,26 +36,14 @@ void RTC_CalendarBkupInit(void)
   - OutPutPolarity = High Polarity
   - OutPutType     = Open Drain */
   RtcHandle.Instance = RTC;
-  RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
-  RtcHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
-  RtcHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
-  RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
-  RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
-  RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
-
-  if(HAL_RTC_Init(&RtcHandle) != HAL_OK)
-  {
-    BOOT_LOG_ERR("HAL_RTC_Init");
-    return;
-  }
-
+  __HAL_RCC_PWR_CLK_ENABLE();
+  HAL_PWR_EnableBkUpAccess();
   rtc_initialized = 1;
 }
 
 void RTCInit() {
   if(!rtc_initialized) { 
-    HAL_RTC_MspInit(&RtcHandle);
-    RTC_CalendarBkupInit();
+    RTC_Bkp_Init();
   }
 }
 

app/rtc/rtc.h

@@ -20,8 +20,7 @@
 #define __RTC_H
 
 #include <stdint.h>
-#include "stm32h7xx_hal.h"
-#include "stm32h7xx_hal_rtc.h"
+#include "rtc_api_hal.h"
 
 #ifdef __cplusplus
 extern "C" {