stm32g4xx_hal_timebase_tim.c

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    stm32g4xx_hal_timebase_TIM.c
  * @brief   HAL time base based on the hardware TIM.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2021 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under Ultimate Liberty license
  * SLA0044, the "License"; You may not use this file except in compliance with
  * the License. You may obtain a copy of the License at:
  *                             www.st.com/SLA0044
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "stm32g4xx_hal.h"
#include "stm32g4xx_hal_tim.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef        htim1;
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  This function configures the TIM1 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;
  HAL_StatusTypeDef     status = HAL_OK;

  /* Enable TIM1 clock */
  __HAL_RCC_TIM1_CLK_ENABLE();

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

  /* Compute TIM1 clock */
  uwTimclock = HAL_RCC_GetPCLK2Freq();
  /* Compute the prescaler value to have TIM1 counter clock equal to 1MHz */
  uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000U) - 1U);

  /* Initialize TIM1 */
  htim1.Instance = TIM1;

  /* Initialize TIMx peripheral as follow:
  + Period = [(TIM1CLK/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
  */
  htim1.Init.Period = (1000000U / 1000U) - 1U;
  htim1.Init.Prescaler = uwPrescalerValue;
  htim1.Init.ClockDivision = 0;
  htim1.Init.CounterMode = TIM_COUNTERMODE_UP;

  status = HAL_TIM_Base_Init(&htim1);
  if (status == HAL_OK)
  {
    /* Start the TIM time Base generation in interrupt mode */
    status = HAL_TIM_Base_Start_IT(&htim1);
    if (status == HAL_OK)
    {
    /* Enable the TIM1 global Interrupt */
        HAL_NVIC_EnableIRQ(TIM1_UP_TIM16_IRQn);
      /* Configure the SysTick IRQ priority */
      if (TickPriority < (1UL << __NVIC_PRIO_BITS))
      {
        /* Configure the TIM IRQ priority */
        HAL_NVIC_SetPriority(TIM1_UP_TIM16_IRQn, TickPriority, 0U);
        uwTickPrio = TickPriority;
      }
      else
      {
        status = HAL_ERROR;
      }
    }
  }
 /* Return function status */
  return status;
}

/**
  * @brief  Suspend Tick increment.
  * @note   Disable the tick increment by disabling TIM1 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_SuspendTick(void)
{
  /* Disable TIM1 update Interrupt */
  __HAL_TIM_DISABLE_IT(&htim1, TIM_IT_UPDATE);
}

/**
  * @brief  Resume Tick increment.
  * @note   Enable the tick increment by Enabling TIM1 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_ResumeTick(void)
{
  /* Enable TIM1 Update interrupt */
  __HAL_TIM_ENABLE_IT(&htim1, TIM_IT_UPDATE);
}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/