--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_timebase_rtc_alarm_template.c	Sun Feb 17 21:12:22 2019 +0100
@@ -0,0 +1,312 @@
+/**
+  ******************************************************************************
+  * @file    stm32f4xx_hal_timebase_rtc_alarm_template.c 
+  * @author  MCD Application Team
+  * @brief   HAL time base based on the hardware RTC_ALARM Template.
+  *
+  *          This file override the native HAL time base functions (defined as weak)
+  *          to use the RTC ALARM for time base generation:
+  *           + Intializes the RTC peripheral to increment the seconds registers each 1ms
+  *           + The alarm is configured to assert an interrupt when the RTC reaches 1ms 
+  *           + HAL_IncTick is called at each Alarm event and the time is reset to 00:00:00
+  *           + 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 'stm32f4xx_hal_timebase_rtc_alarm.c'
+    (#) Add this file and the RTC HAL drivers to your project and uncomment
+       HAL_RTC_MODULE_ENABLED define in stm32f4xx_hal_conf.h 
+
+    [..]
+    (@) HAL RTC alarm and HAL RTC wakeup drivers can’t 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 stm32f4xx_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 "stm32f4xx_hal.h"
+/** @addtogroup STM32F4xx_HAL_Driver
+  * @{
+  */
+
+/** @defgroup HAL_TimeBase_RTC_Alarm_Template  HAL TimeBase RTC Alarm 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_Alarm_IRQHandler(void);
+/* Private functions ---------------------------------------------------------*/
+
+/**
+  * @brief  This function configures the RTC_ALARMA as a time base source. 
+  *         The time source is configured  to have 1ms time base with a dedicated 
+  *         Tick interrupt priority. 
+  * @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 Alarm A interrupt */
+      __HAL_RTC_ALARMA_DISABLE(&hRTC_Handle);
+
+      /* Clear flag alarm A */
+      __HAL_RTC_ALARM_CLEAR_FLAG(&hRTC_Handle, RTC_FLAG_ALRAF);
+
+      counter = 0U;
+      /* Wait till RTC ALRAWF flag is set and if Time out is reached exit */
+      while(__HAL_RTC_ALARM_GET_FLAG(&hRTC_Handle, RTC_FLAG_ALRAWF) == RESET)
+      {
+        if(counter++ == (SystemCoreClock /48U)) /* Timeout = ~ 1s */
+        {
+          return HAL_ERROR;
+        }
+      }
+
+      hRTC_Handle.Instance->ALRMAR = (uint32_t)0x01U;
+
+      /* Configure the Alarm state: Enable Alarm */
+      __HAL_RTC_ALARMA_ENABLE(&hRTC_Handle);
+      /* Configure the Alarm interrupt */
+      __HAL_RTC_ALARM_ENABLE_IT(&hRTC_Handle, RTC_IT_ALRA);
+
+      /* RTC Alarm Interrupt Configuration: EXTI configuration */
+      __HAL_RTC_ALARM_EXTI_ENABLE_IT();
+      __HAL_RTC_ALARM_EXTI_ENABLE_RISING_EDGE();
+
+      /* Check if the Initialization mode is set */
+      if((hRTC_Handle.Instance->ISR & RTC_ISR_INITF) == (uint32_t)RESET)
+      {
+        /* Set the Initialization mode */
+        hRTC_Handle.Instance->ISR = (uint32_t)RTC_INIT_MASK;
+        counter = 0U;
+        while((hRTC_Handle.Instance->ISR & RTC_ISR_INITF) == (uint32_t)RESET)
+        {
+          if(counter++ == (SystemCoreClock /48U)) /* Timeout = ~ 1s */
+          {
+            return HAL_ERROR;
+          }
+        }
+      }
+      hRTC_Handle.Instance->DR = 0U;
+      hRTC_Handle.Instance->TR = 0U;
+
+      hRTC_Handle.Instance->ISR &= (uint32_t)~RTC_ISR_INIT;
+
+      /* Enable the write protection for RTC registers */
+      __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle);
+
+      HAL_NVIC_SetPriority(RTC_Alarm_IRQn, TickPriority, 0U);
+      HAL_NVIC_EnableIRQ(RTC_Alarm_IRQn);
+      return HAL_OK;
+    }
+  }
+  return HAL_ERROR;
+}
+
+/**
+  * @brief  Suspend Tick increment.
+  * @note   Disable the tick increment by disabling RTC ALARM interrupt.
+  * @retval None
+  */
+void HAL_SuspendTick(void)
+{
+  /* Disable the write protection for RTC registers */
+  __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle);
+  /* Disable RTC ALARM update Interrupt */
+  __HAL_RTC_ALARM_DISABLE_IT(&hRTC_Handle, RTC_IT_ALRA);
+  /* 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 ALARM interrupt.
+  * @retval None
+  */
+void HAL_ResumeTick(void)
+{
+  /* Disable the write protection for RTC registers */
+  __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle);
+  /* Enable RTC ALARM Update interrupt */
+  __HAL_RTC_ALARM_ENABLE_IT(&hRTC_Handle, RTC_IT_ALRA);
+  /* Enable the write protection for RTC registers */
+  __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle);
+}
+
+/**
+  * @brief  ALARM A Event Callback in non blocking mode
+  * @note   This function is called  when RTC_ALARM interrupt took place, inside
+  * RTC_ALARM_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_RTC_AlarmAEventCallback(RTC_HandleTypeDef *hrtc)
+{
+  __IO uint32_t counter = 0U;
+
+  HAL_IncTick();
+
+  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
+
+  /* Set the Initialization mode */
+  hrtc->Instance->ISR = (uint32_t)RTC_INIT_MASK;
+
+  while((hrtc->Instance->ISR & RTC_ISR_INITF) == (uint32_t)RESET)
+  {
+    if(counter++ == (SystemCoreClock /48U)) /* Timeout = ~ 1s */
+    {
+      break;
+    }
+  }
+
+  hrtc->Instance->DR = 0U;
+  hrtc->Instance->TR = 0U;
+
+  hrtc->Instance->ISR &= (uint32_t)~RTC_ISR_INIT;
+
+  /* Enable the write protection for RTC registers */
+  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
+}
+
+/**
+  * @brief  This function handles RTC ALARM interrupt request.
+  * @retval None
+  */
+void RTC_Alarm_IRQHandler(void)
+{
+  HAL_RTC_AlarmIRQHandler(&hRTC_Handle);
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/