131 lines
4.1 KiB
C
131 lines
4.1 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file stm32h7xx_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) 2021 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 "stm32h7xx_hal.h"
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#include "stm32h7xx_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 htim7;
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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 TIM7 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;
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uint32_t uwPrescalerValue;
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uint32_t pFLatency;
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/*Configure the TIM7 IRQ priority */
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if (TickPriority < (1UL << __NVIC_PRIO_BITS))
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{
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HAL_NVIC_SetPriority(TIM7_IRQn, TickPriority ,0U);
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/* Enable the TIM7 global Interrupt */
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HAL_NVIC_EnableIRQ(TIM7_IRQn);
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uwTickPrio = TickPriority;
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}
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else
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{
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return HAL_ERROR;
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}
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/* Enable TIM7 clock */
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__HAL_RCC_TIM7_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 TIM7 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 TIM7 counter clock equal to 1MHz */
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uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000U) - 1U);
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/* Initialize TIM7 */
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htim7.Instance = TIM7;
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/* Initialize TIMx peripheral as follow:
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+ Period = [(TIM7CLK/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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htim7.Init.Period = (1000000U / 1000U) - 1U;
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htim7.Init.Prescaler = uwPrescalerValue;
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htim7.Init.ClockDivision = 0;
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htim7.Init.CounterMode = TIM_COUNTERMODE_UP;
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if(HAL_TIM_Base_Init(&htim7) == HAL_OK)
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{
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/* Start the TIM time Base generation in interrupt mode */
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return HAL_TIM_Base_Start_IT(&htim7);
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}
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/* Return function status */
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return HAL_ERROR;
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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 TIM7 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 TIM7 update Interrupt */
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__HAL_TIM_DISABLE_IT(&htim7, 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 TIM7 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 TIM7 Update interrupt */
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__HAL_TIM_ENABLE_IT(&htim7, TIM_IT_UPDATE);
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}
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