Dmitry Maylarov
7 years ago
parent
6f27bb7d81
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cc4996d463
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/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file stm32f1xx_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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* <h2><center>© Copyright (c) 2019 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under Ultimate Liberty license
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* SLA0044, the "License"; You may not use this file except in compliance with
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* the License. You may obtain a copy of the License at:
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* www.st.com/SLA0044
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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 "stm32f1xx_hal.h"
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#include "stm32f1xx_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 htim4;
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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 TIM4 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 = 0;
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uint32_t uwPrescalerValue = 0;
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uint32_t pFLatency;
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/*Configure the TIM4 IRQ priority */
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HAL_NVIC_SetPriority(TIM4_IRQn, TickPriority ,0);
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/* Enable the TIM4 global Interrupt */
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HAL_NVIC_EnableIRQ(TIM4_IRQn);
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/* Enable TIM4 clock */
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__HAL_RCC_TIM4_CLK_ENABLE();
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/* Get clock configuration */
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HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);
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/* Compute TIM4 clock */
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uwTimclock = HAL_RCC_GetPCLK1Freq();
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/* Compute the prescaler value to have TIM4 counter clock equal to 1MHz */
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uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000) - 1);
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/* Initialize TIM4 */
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htim4.Instance = TIM4;
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/* Initialize TIMx peripheral as follow:
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+ Period = [(TIM4CLK/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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htim4.Init.Period = (1000000 / 1000) - 1;
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htim4.Init.Prescaler = uwPrescalerValue;
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htim4.Init.ClockDivision = 0;
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htim4.Init.CounterMode = TIM_COUNTERMODE_UP;
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if(HAL_TIM_Base_Init(&htim4) == 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(&htim4);
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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 TIM4 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 TIM4 update Interrupt */
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__HAL_TIM_DISABLE_IT(&htim4, 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 TIM4 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 TIM4 Update interrupt */
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__HAL_TIM_ENABLE_IT(&htim4, TIM_IT_UPDATE);
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}
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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