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136 lines
4.4 KiB
136 lines
4.4 KiB
/* USER CODE BEGIN Header */ |
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/** |
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****************************************************************************** |
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* @file stm32f7xx_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) 2022 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 "stm32f7xx_hal.h" |
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#include "stm32f7xx_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 htim6; |
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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 TIM6 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 TIM6 clock */ |
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__HAL_RCC_TIM6_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 TIM6 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 TIM6 counter clock equal to 1MHz */ |
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uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000U) - 1U); |
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/* Initialize TIM6 */ |
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htim6.Instance = TIM6; |
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/* Initialize TIMx peripheral as follow: |
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+ Period = [(TIM6CLK/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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htim6.Init.Period = (1000000U / 1000U) - 1U; |
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htim6.Init.Prescaler = uwPrescalerValue; |
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htim6.Init.ClockDivision = 0; |
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htim6.Init.CounterMode = TIM_COUNTERMODE_UP; |
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htim6.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE; |
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status = HAL_TIM_Base_Init(&htim6); |
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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(&htim6); |
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if (status == HAL_OK) |
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{ |
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/* Enable the TIM6 global Interrupt */ |
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HAL_NVIC_EnableIRQ(TIM6_DAC_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(TIM6_DAC_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 TIM6 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 TIM6 update Interrupt */ |
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__HAL_TIM_DISABLE_IT(&htim6, 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 TIM6 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 TIM6 Update interrupt */ |
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__HAL_TIM_ENABLE_IT(&htim6, TIM_IT_UPDATE); |
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} |
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