/**
  ******************************************************************************
  * @file    stm32u5xx_hal_timebase_tim_template.c
  * @author  MCD Application Team
  * @brief   HAL time base based on the hardware TIM.
  *
  *          This file overrides the native HAL time base functions (defined as weak)
  *          the TIM time base:
  *           + Initializes the TIM peripheral to generate a Period elapsed Event each 1ms
  *           + HAL_IncTick is called inside HAL_TIM_PeriodElapsedCallback ie each 1ms
  *
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2021 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
 @verbatim
  ==============================================================================
                        ##### How to use this driver #####
  ==============================================================================
    [..]
    This file must be copied to the application folder and modified as follows:
    (#) Rename it to 'stm32u5xx_hal_timebase_tim.c'
    (#) Add this file and the TIM HAL drivers to your project and uncomment
       HAL_TIM_MODULE_ENABLED define in stm32u5xx_hal_conf.h

  @endverbatim
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32u5xx_hal.h"

/** @addtogroup STM32U5xx_HAL_Driver
  * @{
  */

/** @addtogroup HAL_TimeBase
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static TIM_HandleTypeDef        TimHandle;

/* Private function prototypes -----------------------------------------------*/
void TIM6_IRQHandler(void);
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1U)
void TimeBase_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  This function configures the TIM6 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;
  uint32_t              uwAPB1Prescaler;
  uint32_t              uwPrescalerValue;
  uint32_t              pFLatency;
  HAL_StatusTypeDef     Status;

  /* Enable TIM6 clock */
  __HAL_RCC_TIM6_CLK_ENABLE();

  /* Get clock configuration */
  HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);

  /* Get APB1 prescaler */
  uwAPB1Prescaler = clkconfig.APB1CLKDivider;

  /* Compute TIM6 clock */
  if (uwAPB1Prescaler == RCC_HCLK_DIV1)
  {
    uwTimclock = HAL_RCC_GetPCLK1Freq();
  }
  else
  {
    uwTimclock = 2UL * HAL_RCC_GetPCLK1Freq();
  }

  /* Compute the prescaler value to have TIM6 counter clock equal to 100KHz */
  uwPrescalerValue = (uint32_t)((uwTimclock / 100000U) - 1U);

  /* Initialize TIM6 */
  TimHandle.Instance = TIM6;

  /* Initialize TIMx peripheral as follow:
  + Period = [(TIM6CLK/1000) - 1]. to have a (1/1000) s time base.
  + Prescaler = (uwTimclock/100000 - 1) to have a 100KHz counter clock.
  + ClockDivision = 0
  + Counter direction = Up
  */
  TimHandle.Init.Period = (100000U / 1000U) - 1U;
  TimHandle.Init.Prescaler = uwPrescalerValue;
  TimHandle.Init.ClockDivision = 0;
  TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
  Status = HAL_TIM_Base_Init(&TimHandle);
  if (Status == HAL_OK)
  {
    /* Start the TIM time Base generation in interrupt mode */
    Status = HAL_TIM_Base_Start_IT(&TimHandle);
    if (Status == HAL_OK)
    {
      if (TickPriority < (1UL << __NVIC_PRIO_BITS))
      {
        /* Configure the TIM6 global Interrupt priority */
        HAL_NVIC_SetPriority(TIM6_IRQn, TickPriority, 0);

        /* Enable the TIM6 global Interrupt */
        HAL_NVIC_EnableIRQ(TIM6_IRQn);

        uwTickPrio = TickPriority;
      }
      else
      {
        Status = HAL_ERROR;
      }
    }
  }
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1U)
  HAL_TIM_RegisterCallback(&TimHandle, HAL_TIM_PERIOD_ELAPSED_CB_ID, TimeBase_TIM_PeriodElapsedCallback);
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */

  /* Return function Status */
  return Status;
}

/**
  * @brief  Suspend Tick increment.
  * @note   Disable the tick increment by disabling TIM6 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_SuspendTick(void)
{
  /* Disable TIM6 update Interrupt */
  __HAL_TIM_DISABLE_IT(&TimHandle, TIM_IT_UPDATE);
}

/**
  * @brief  Resume Tick increment.
  * @note   Enable the tick increment by Enabling TIM6 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_ResumeTick(void)
{
  /* Enable TIM6 Update interrupt */
  __HAL_TIM_ENABLE_IT(&TimHandle, TIM_IT_UPDATE);
}

/**
  * @brief  Period elapsed callback in non blocking mode
  * @note   This function is called  when TIM6 interrupt took place, inside
  * HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
  * a global variable "uwTick" used as application time base.
  * @param  htim TIM handle
  * @retval None
  */
#if (USE_HAL_TIM_REGISTER_CALLBACKS == 1U)
void TimeBase_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
#else
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
#endif /* USE_HAL_TIM_REGISTER_CALLBACKS */
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(htim);

  HAL_IncTick();
}

/**
  * @brief  This function handles TIM interrupt request.
  * @param  None
  * @retval None
  */
void TIM6_IRQHandler(void)
{
  HAL_TIM_IRQHandler(&TimHandle);
}

/**
  * @}
  */

/**
  * @}
  */
