text: /* USER CODE BEGIN Header */
  /**
    ******************************************************************************
    * @file    stm32f4xx_hal_timebase_TIM.c 
    * @brief   HAL time base based on the hardware TIM.
    ******************************************************************************
    * This notice applies to any and all portions of this file
    * that are not between comment pairs USER CODE BEGIN and
    * USER CODE END. Other portions of this file, whether 
    * inserted by the user or by software development tools
    * are owned by their respective copyright owners.
    *
    * Copyright (c) 2018 STMicroelectronics International N.V. 
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without 
    * modification, are permitted, provided that the following conditions are met:
    *
    * 1. Redistribution 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 other 
    *    contributors to this software may be used to endorse or promote products 
    *    derived from this software without specific written permission.
    * 4. This software, including modifications and/or derivative works of this 
    *    software, must execute solely and exclusively on microcontroller or
    *    microprocessor devices manufactured by or for STMicroelectronics.
    * 5. Redistribution and use of this software other than as permitted under 
    *    this license is void and will automatically terminate your rights under 
    *    this license. 
    *
    * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" 
    * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT 
    * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
    * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
    * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT 
    * SHALL STMICROELECTRONICS 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.
    *
    ******************************************************************************
    */
  /* USER CODE END Header */
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f4xx_hal.h"
  #include "stm32f4xx_hal_tim.h"
   
  /* Private typedef -----------------------------------------------------------*/
  /* Private define ------------------------------------------------------------*/
  /* Private macro -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  TIM_HandleTypeDef        htim14; 
  /* Private function prototypes -----------------------------------------------*/
  /* Private functions ---------------------------------------------------------*/
  
  /**
    * @brief  This function configures the TIM14 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)
  {
    RCC_ClkInitTypeDef    clkconfig;
    uint32_t              uwTimclock = 0;
    uint32_t              uwPrescalerValue = 0;
    uint32_t              pFLatency;
    
    /*Configure the TIM14 IRQ priority */
    HAL_NVIC_SetPriority(TIM8_TRG_COM_TIM14_IRQn, TickPriority ,0); 
    
    /* Enable the TIM14 global Interrupt */
    HAL_NVIC_EnableIRQ(TIM8_TRG_COM_TIM14_IRQn); 
    
    /* Enable TIM14 clock */
    __HAL_RCC_TIM14_CLK_ENABLE();
    
    /* Get clock configuration */
    HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);
    
    /* Compute TIM14 clock */
    uwTimclock = 2*HAL_RCC_GetPCLK1Freq();
     
    /* Compute the prescaler value to have TIM14 counter clock equal to 1MHz */
    uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000) - 1);
    
    /* Initialize TIM14 */
    htim14.Instance = TIM14;
    
    /* Initialize TIMx peripheral as follow:
    + Period = [(TIM14CLK/1000) - 1]. to have a (1/1000) s time base.
    + Prescaler = (uwTimclock/1000000 - 1) to have a 1MHz counter clock.
    + ClockDivision = 0
    + Counter direction = Up
    */
    htim14.Init.Period = (1000000 / 1000) - 1;
    htim14.Init.Prescaler = uwPrescalerValue;
    htim14.Init.ClockDivision = 0;
    htim14.Init.CounterMode = TIM_COUNTERMODE_UP;
    if(HAL_TIM_Base_Init(&htim14) == HAL_OK)
    {
      /* Start the TIM time Base generation in interrupt mode */
      return HAL_TIM_Base_Start_IT(&htim14);
    }
    
    /* Return function status */
    return HAL_ERROR;
  }
  
  /**
    * @brief  Suspend Tick increment.
    * @note   Disable the tick increment by disabling TIM14 update interrupt.
    * @param  None
    * @retval None
    */
  void HAL_SuspendTick(void)
  {
    /* Disable TIM14 update Interrupt */
    __HAL_TIM_DISABLE_IT(&htim14, TIM_IT_UPDATE);                                                  
  }
  
  /**
    * @brief  Resume Tick increment.
    * @note   Enable the tick increment by Enabling TIM14 update interrupt.
    * @param  None
    * @retval None
    */
  void HAL_ResumeTick(void)
  {
    /* Enable TIM14 Update interrupt */
    __HAL_TIM_ENABLE_IT(&htim14, TIM_IT_UPDATE);
  }
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  