/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    stm32h7xx_hal_timebase_tim.c
  * @brief   HAL time base based on the hardware TIM.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 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.
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "stm32h7xx_hal.h"
#include "stm32h7xx_hal_tim.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef        htim7;
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  This function configures the TIM7 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;

  /*Configure the TIM7 IRQ priority */
  if (TickPriority < (1UL << __NVIC_PRIO_BITS))
   {
     HAL_NVIC_SetPriority(TIM7_IRQn, TickPriority ,0);

     /* Enable the TIM7 global Interrupt */
     HAL_NVIC_EnableIRQ(TIM7_IRQn);
     uwTickPrio = TickPriority;
    }
  else
  {
    return HAL_ERROR;
  }

  /* Enable TIM7 clock */
  __HAL_RCC_TIM7_CLK_ENABLE();

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

  /* Get APB1 prescaler */
  uwAPB1Prescaler = clkconfig.APB1CLKDivider;
  /* Compute TIM7 clock */
  if (uwAPB1Prescaler == RCC_HCLK_DIV1)
  {
    uwTimclock = HAL_RCC_GetPCLK1Freq();
  }
  else
  {
    uwTimclock = 2UL * HAL_RCC_GetPCLK1Freq();
  }

  /* Compute the prescaler value to have TIM7 counter clock equal to 1MHz */
  uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000U) - 1U);

  /* Initialize TIM7 */
  htim7.Instance = TIM7;

  /* Initialize TIMx peripheral as follow:

  + Period = [(TIM7CLK/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
  */
  htim7.Init.Period = (1000000U / 1000U) - 1U;
  htim7.Init.Prescaler = uwPrescalerValue;
  htim7.Init.ClockDivision = 0;
  htim7.Init.CounterMode = TIM_COUNTERMODE_UP;

  if(HAL_TIM_Base_Init(&htim7) == HAL_OK)
  {
    /* Start the TIM time Base generation in interrupt mode */
    return HAL_TIM_Base_Start_IT(&htim7);
  }

  /* Return function status */
  return HAL_ERROR;
}

/**
  * @brief  Suspend Tick increment.
  * @note   Disable the tick increment by disabling TIM7 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_SuspendTick(void)
{
  /* Disable TIM7 update Interrupt */
  __HAL_TIM_DISABLE_IT(&htim7, TIM_IT_UPDATE);
}

/**
  * @brief  Resume Tick increment.
  * @note   Enable the tick increment by Enabling TIM7 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_ResumeTick(void)
{
  /* Enable TIM7 Update interrupt */
  __HAL_TIM_ENABLE_IT(&htim7, TIM_IT_UPDATE);
}

