/**
 * @file stm32h5xx_hal_timebase_tim.c
 * @brief HAL time base based on the hardware TIM.
 *
 * @section License
 *
 * Copyright (C) 2021-2026 Oryx Embedded SARL. All rights reserved.
 * 
 * SPDX-License-Identifier: GPL-2.0-or-later
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

 *
 * @author Oryx Embedded SARL (www.oryx-embedded.com)
 * @version 2.6.0
 **/

/* USER CODE BEGIN Header */

/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "stm32h5xx_hal.h"
#include "stm32h5xx_hal_tim.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef        htim6;
/* Private function prototypes -----------------------------------------------*/
/* 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, 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 */
  htim6.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
  */
  htim6.Init.Period = (1000000U / 1000U) - 1U;
  htim6.Init.Prescaler = uwPrescalerValue;
  htim6.Init.ClockDivision = 0;
  htim6.Init.CounterMode = TIM_COUNTERMODE_UP;

  status = HAL_TIM_Base_Init(&htim6);
  if (status == HAL_OK)
  {
    /* Start the TIM time Base generation in interrupt mode */
    status = HAL_TIM_Base_Start_IT(&htim6);
    if (status == HAL_OK)
    {
      if (TickPriority < (1UL << __NVIC_PRIO_BITS))
      {
        /* Enable the TIM6 global Interrupt */
        HAL_NVIC_SetPriority(TIM6_IRQn, TickPriority, 0U);
        uwTickPrio = TickPriority;
      }
      else
      {
        status = HAL_ERROR;
      }
    }
  }
  /* Enable the TIM6 global Interrupt */
  HAL_NVIC_EnableIRQ(TIM6_IRQn);
 /* 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(&htim6, 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(&htim6, 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
  */
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
  if(htim->Instance == TIM6)
  {
    HAL_IncTick();
  }
}
