text: ///**
  //  ******************************************************************************
  //  * @file    stm32f7xx_hal_timebase_rtc_wakeup_template.c
  //  * @author  MCD Application Team
  //  * @brief   HAL time base based on the hardware RTC_WAKEUP Template.
  //  *
  //  *          This file overrides the native HAL time base functions (defined as weak)
  //  *          to use the RTC WAKEUP for the time base generation:
  //  *           + Intializes the RTC peripheral and configures the wakeup timer to be
  //  *             incremented each 1ms
  //  *           + The wakeup feature is configured to assert an interrupt each 1ms
  //  *           + HAL_IncTick is called inside the HAL_RTCEx_WakeUpTimerEventCallback
  //  *           + HSE (default), LSE or LSI can be selected as RTC clock source
  // @verbatim
  //  ==============================================================================
  //                        ##### How to use this driver #####
  //  ==============================================================================
  //    [..]
  //    This file must be copied to the application folder and modified as follows:
  //    (#) Rename it to 'stm32f7xx_hal_timebase_rtc_wakeup.c'
  //    (#) Add this file and the RTC HAL drivers to your project and uncomment
  //       HAL_RTC_MODULE_ENABLED define in stm32f7xx_hal_conf.h
  //
  //    [..]
  //    (@) HAL RTC alarm and HAL RTC wakeup drivers cant be used with low power modes:
  //        The wake up capability of the RTC may be intrusive in case of prior low power mode
  //        configuration requiring different wake up sources.
  //        Application/Example behavior is no more guaranteed
  //    (@) The stm32f7xx_hal_timebase_tim use is recommended for the Applications/Examples
  //          requiring low power modes
  //
  //  @endverbatim
  //  ******************************************************************************
  //  * @attention
  //  *
  //  * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
  //  *
  //  * Redistribution and use in source and binary forms, with or without modification,
  //  * are permitted provided that the following conditions are met:
  //  *   1. Redistributions of source code must retain the above copyright notice,
  //  *      this list of conditions and the following disclaimer.
  //  *   2. Redistributions in binary form must reproduce the above copyright notice,
  //  *      this list of conditions and the following disclaimer in the documentation
  //  *      and/or other materials provided with the distribution.
  //  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  //  *      may be used to endorse or promote products derived from this software
  //  *      without specific prior written permission.
  //  *
  //  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  //  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  //  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  //  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  //  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  //  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  //  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  //  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  //  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  //  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  //  *
  //  ******************************************************************************
  //  */
  //
  ///* Includes ------------------------------------------------------------------*/
  //#include "stm32f7xx_hal.h"
  ///** @addtogroup STM32F7xx_HAL_Driver
  //  * @{
  //  */
  //
  ///** @defgroup HAL_TimeBase_RTC_WakeUp_Template  HAL TimeBase RTC WakeUp Template
  //  * @{
  //  */
  //
  ///* Private typedef -----------------------------------------------------------*/
  ///* Private define ------------------------------------------------------------*/
  //
  ///* Uncomment the line below to select the appropriate RTC Clock source for your application:
  //  + RTC_CLOCK_SOURCE_HSE: can be selected for applications requiring timing precision.
  //  + RTC_CLOCK_SOURCE_LSE: can be selected for applications with low constraint on timing
  //                          precision.
  //  + RTC_CLOCK_SOURCE_LSI: can be selected for applications with low constraint on timing
  //                          precision.
  //  */
  //#define RTC_CLOCK_SOURCE_HSE
  ///* #define RTC_CLOCK_SOURCE_LSE */
  ///* #define RTC_CLOCK_SOURCE_LSI */
  //
  //#ifdef RTC_CLOCK_SOURCE_HSE
  //  #define RTC_ASYNCH_PREDIV       99U
  //  #define RTC_SYNCH_PREDIV        9U
  //  #define RCC_RTCCLKSOURCE_1MHZ   ((uint32_t)((uint32_t)RCC_BDCR_RTCSEL | (uint32_t)((HSE_VALUE/1000000U) << 16U)))
  //#else /* RTC_CLOCK_SOURCE_LSE || RTC_CLOCK_SOURCE_LSI */
  //  #define RTC_ASYNCH_PREDIV       0U
  //  #define RTC_SYNCH_PREDIV        31U
  //#endif /* RTC_CLOCK_SOURCE_HSE */
  //
  ///* Private macro -------------------------------------------------------------*/
  ///* Private variables ---------------------------------------------------------*/
  //RTC_HandleTypeDef        hRTC_Handle;
  //
  ///* Private function prototypes -----------------------------------------------*/
  //void RTC_WKUP_IRQHandler(void);
  //
  ///* Private functions ---------------------------------------------------------*/
  //
  ///**
  //  * @brief  This function configures the RTC_WKUP as a time base source.
  //  *         The time source is configured  to have 1ms time base with a dedicated
  //  *         Tick interrupt priority.
  //  *         Wakeup Time base = ((RTC_ASYNCH_PREDIV + 1) * (RTC_SYNCH_PREDIV + 1)) / RTC_CLOCK
  //                             = 1ms
  //  *         Wakeup Time = WakeupTimebase * WakeUpCounter (0 + 1)
  //                        = 1 ms
  //  * @note   This function is called  automatically at the beginning of program after
  //  *         reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig().
  //  * @param  TickPriority Tick interrupt priority.
  //  * @retval HAL status
  //  */
  //HAL_StatusTypeDef HAL_InitTick (uint32_t TickPriority)
  //{
  //  __IO uint32_t counter = 0U;
  //
  //  RCC_OscInitTypeDef        RCC_OscInitStruct;
  //  RCC_PeriphCLKInitTypeDef  PeriphClkInitStruct;
  //
  //#ifdef RTC_CLOCK_SOURCE_LSE
  //  /* Configue LSE as RTC clock soucre */
  //  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
  //  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  //  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
  //  PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
  //#elif defined (RTC_CLOCK_SOURCE_LSI)
  //  /* Configue LSI as RTC clock soucre */
  //  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI;
  //  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  //  RCC_OscInitStruct.LSIState = RCC_LSI_ON;
  //  PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
  //#elif defined (RTC_CLOCK_SOURCE_HSE)
  //  /* Configue HSE as RTC clock soucre */
  //  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  //  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  //  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  //  /* Ensure that RTC is clocked by 1MHz */
  //  PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_1MHZ;
  //#else
  //#error Please select the RTC Clock source
  //#endif /* RTC_CLOCK_SOURCE_LSE */
  //
  //  if(HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK)
  //  {
  //    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
  //    if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) == HAL_OK)
  //    {
  //      /* Enable RTC Clock */
  //      __HAL_RCC_RTC_ENABLE();
  //      /* The time base should be 1ms
  //         Time base = ((RTC_ASYNCH_PREDIV + 1) * (RTC_SYNCH_PREDIV + 1)) / RTC_CLOCK
  //         HSE as RTC clock
  //           Time base = ((99 + 1) * (9 + 1)) / 1Mhz
  //                     = 1ms
  //         LSE as RTC clock
  //           Time base = ((31 + 1) * (0 + 1)) / 32.768Khz
  //                     = ~1ms
  //         LSI as RTC clock
  //           Time base = ((31 + 1) * (0 + 1)) / 32Khz
  //                     = 1ms
  //      */
  //      hRTC_Handle.Instance = RTC;
  //      hRTC_Handle.Init.HourFormat = RTC_HOURFORMAT_24;
  //      hRTC_Handle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
  //      hRTC_Handle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
  //      hRTC_Handle.Init.OutPut = RTC_OUTPUT_DISABLE;
  //      hRTC_Handle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
  //      hRTC_Handle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
  //      HAL_RTC_Init(&hRTC_Handle);
  //
  //      /* Disable the write protection for RTC registers */
  //      __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle);
  //
  //      /* Disable the Wake-up Timer */
  //      __HAL_RTC_WAKEUPTIMER_DISABLE(&hRTC_Handle);
  //
  //      /* In case of interrupt mode is used, the interrupt source must disabled */
  //      __HAL_RTC_WAKEUPTIMER_DISABLE_IT(&hRTC_Handle,RTC_IT_WUT);
  //
  //      /* Wait till RTC WUTWF flag is set  */
  //      while(__HAL_RTC_WAKEUPTIMER_GET_FLAG(&hRTC_Handle, RTC_FLAG_WUTWF) == RESET)
  //      {
  //        if(counter++ == (SystemCoreClock /48U))
  //        {
  //          return HAL_ERROR;
  //        }
  //      }
  //
  //      /* Clear PWR wake up Flag */
  //      __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
  //
  //      /* Clear RTC Wake Up timer Flag */
  //      __HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(&hRTC_Handle, RTC_FLAG_WUTF);
  //
  //      /* Configure the Wake-up Timer counter */
  //      hRTC_Handle.Instance->WUTR = (uint32_t)0U;
  //
  //      /* Clear the Wake-up Timer clock source bits in CR register */
  //      hRTC_Handle.Instance->CR &= (uint32_t)~RTC_CR_WUCKSEL;
  //
  //      /* Configure the clock source */
  //      hRTC_Handle.Instance->CR |= (uint32_t)RTC_WAKEUPCLOCK_CK_SPRE_16BITS;
  //
  //      /* RTC WakeUpTimer Interrupt Configuration: EXTI configuration */
  //      __HAL_RTC_WAKEUPTIMER_EXTI_ENABLE_IT();
  //
  //      __HAL_RTC_WAKEUPTIMER_EXTI_ENABLE_RISING_EDGE();
  //
  //      /* Configure the Interrupt in the RTC_CR register */
  //      __HAL_RTC_WAKEUPTIMER_ENABLE_IT(&hRTC_Handle,RTC_IT_WUT);
  //
  //      /* Enable the Wake-up Timer */
  //      __HAL_RTC_WAKEUPTIMER_ENABLE(&hRTC_Handle);
  //
  //      /* Enable the write protection for RTC registers */
  //      __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle);
  //
  //      HAL_NVIC_SetPriority(RTC_WKUP_IRQn, TickPriority, 0U);
  //      HAL_NVIC_EnableIRQ(RTC_WKUP_IRQn);
  //      return HAL_OK;
  //    }
  //  }
  //  return HAL_ERROR;
  //}
  //
  ///**
  //  * @brief  Suspend Tick increment.
  //  * @note   Disable the tick increment by disabling RTC_WKUP interrupt.
  //  * @retval None
  //  */
  //void HAL_SuspendTick(void)
  //{
  //  /* Disable the write protection for RTC registers */
  //  __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle);
  //  /* Disable WAKE UP TIMER Interrupt */
  //  __HAL_RTC_WAKEUPTIMER_DISABLE_IT(&hRTC_Handle, RTC_IT_WUT);
  //  /* Enable the write protection for RTC registers */
  //  __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle);
  //}
  //
  ///**
  //  * @brief  Resume Tick increment.
  //  * @note   Enable the tick increment by Enabling RTC_WKUP interrupt.
  //  * @retval None
  //  */
  //void HAL_ResumeTick(void)
  //{
  //  /* Disable the write protection for RTC registers */
  //  __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle);
  //  /* Enable  WAKE UP TIMER  interrupt */
  //  __HAL_RTC_WAKEUPTIMER_ENABLE_IT(&hRTC_Handle, RTC_IT_WUT);
  //  /* Enable the write protection for RTC registers */
  //  __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle);
  //}
  //
  ///**
  //  * @brief  Wake Up Timer Event Callback in non blocking mode
  //  * @note   This function is called  when RTC_WKUP interrupt took place, inside
  //  * RTC_WKUP_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
  //  * a global variable "uwTick" used as application time base.
  //  * @param  hrtc  RTC handle
  //  * @retval None
  //  */
  //void HAL_RTCEx_WakeUpTimerEventCallback(RTC_HandleTypeDef *hrtc)
  //{
  //  HAL_IncTick();
  //}
  //
  ///**
  //  * @brief  This function handles  WAKE UP TIMER  interrupt request.
  //  * @retval None
  //  */
  //void RTC_WKUP_IRQHandler(void)
  //{
  //  HAL_RTCEx_WakeUpTimerIRQHandler(&hRTC_Handle);
  //}
  //
  ///**
  //  * @}
  //  */
  //
  ///**
  //  * @}
  //  */
  //
  ///************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  