138 lines
4.3 KiB
C
138 lines
4.3 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file stm32f4xx_hal_timebase_TIM.c
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* @brief HAL time base based on the hardware TIM.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2023 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f4xx_hal.h"
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#include "stm32f4xx_hal_tim.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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TIM_HandleTypeDef htim14;
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief This function configures the TIM14 as a time base source.
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* The time source is configured to have 1ms time base with a dedicated
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* Tick interrupt priority.
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* @note This function is called automatically at the beginning of program after
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* reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig().
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* @param TickPriority: Tick interrupt priority.
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
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{
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RCC_ClkInitTypeDef clkconfig;
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uint32_t uwTimclock, uwAPB1Prescaler = 0U;
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uint32_t uwPrescalerValue = 0U;
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uint32_t pFLatency;
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HAL_StatusTypeDef status;
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/* Enable TIM14 clock */
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__HAL_RCC_TIM14_CLK_ENABLE();
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/* Get clock configuration */
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HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);
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/* Get APB1 prescaler */
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uwAPB1Prescaler = clkconfig.APB1CLKDivider;
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/* Compute TIM14 clock */
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if (uwAPB1Prescaler == RCC_HCLK_DIV1)
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{
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uwTimclock = HAL_RCC_GetPCLK1Freq();
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}
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else
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{
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uwTimclock = 2UL * HAL_RCC_GetPCLK1Freq();
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}
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/* Compute the prescaler value to have TIM14 counter clock equal to 1MHz */
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uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000U) - 1U);
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/* Initialize TIM14 */
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htim14.Instance = TIM14;
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/* Initialize TIMx peripheral as follow:
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+ Period = [(TIM14CLK/1000) - 1]. to have a (1/1000) s time base.
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+ Prescaler = (uwTimclock/1000000 - 1) to have a 1MHz counter clock.
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+ ClockDivision = 0
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+ Counter direction = Up
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*/
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htim14.Init.Period = (1000000U / 1000U) - 1U;
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htim14.Init.Prescaler = uwPrescalerValue;
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htim14.Init.ClockDivision = 0;
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htim14.Init.CounterMode = TIM_COUNTERMODE_UP;
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htim14.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
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status = HAL_TIM_Base_Init(&htim14);
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if (status == HAL_OK)
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{
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/* Start the TIM time Base generation in interrupt mode */
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status = HAL_TIM_Base_Start_IT(&htim14);
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if (status == HAL_OK)
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{
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/* Enable the TIM14 global Interrupt */
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HAL_NVIC_EnableIRQ(TIM8_TRG_COM_TIM14_IRQn);
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/* Configure the SysTick IRQ priority */
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if (TickPriority < (1UL << __NVIC_PRIO_BITS))
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{
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/* Configure the TIM IRQ priority */
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HAL_NVIC_SetPriority(TIM8_TRG_COM_TIM14_IRQn, TickPriority, 0U);
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uwTickPrio = TickPriority;
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}
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else
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{
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status = HAL_ERROR;
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}
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}
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}
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/* Return function status */
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return status;
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}
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/**
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* @brief Suspend Tick increment.
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* @note Disable the tick increment by disabling TIM14 update interrupt.
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* @param None
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* @retval None
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*/
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void HAL_SuspendTick(void)
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{
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/* Disable TIM14 update Interrupt */
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__HAL_TIM_DISABLE_IT(&htim14, TIM_IT_UPDATE);
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}
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/**
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* @brief Resume Tick increment.
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* @note Enable the tick increment by Enabling TIM14 update interrupt.
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* @param None
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* @retval None
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*/
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void HAL_ResumeTick(void)
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{
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/* Enable TIM14 Update interrupt */
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__HAL_TIM_ENABLE_IT(&htim14, TIM_IT_UPDATE);
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}
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