tnc3-firmware/Src/stm32l4xx_hal_timebase_TIM.c

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C

/**
******************************************************************************
* @file stm32l4xx_hal_timebase_TIM.c
* @brief HAL time base based on the hardware TIM.
******************************************************************************
* This notice applies to any and all portions of this file
* that are not between comment pairs USER CODE BEGIN and
* USER CODE END. Other portions of this file, whether
* inserted by the user or by software development tools
* are owned by their respective copyright owners.
*
* Copyright (c) 2018 STMicroelectronics International N.V.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted, provided that the following conditions are met:
*
* 1. Redistribution of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of other
* contributors to this software may be used to endorse or promote products
* derived from this software without specific written permission.
* 4. This software, including modifications and/or derivative works of this
* software, must execute solely and exclusively on microcontroller or
* microprocessor devices manufactured by or for STMicroelectronics.
* 5. Redistribution and use of this software other than as permitted under
* this license is void and will automatically terminate your rights under
* this license.
*
* THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
* RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT
* SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32l4xx_hal.h"
#include "stm32l4xx_hal_tim.h"
/** @addtogroup STM32F7xx_HAL_Examples
* @{
*/
/** @addtogroup HAL_TimeBase
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef htim2;
uint32_t uwIncrementState = 0;
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/**
* @brief This function configures the TIM2 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 priorty.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
{
RCC_ClkInitTypeDef clkconfig;
uint32_t uwTimclock = 0;
uint32_t uwPrescalerValue = 0;
uint32_t pFLatency;
/*Configure the TIM2 IRQ priority */
HAL_NVIC_SetPriority(TIM2_IRQn, TickPriority ,0);
/* Enable the TIM2 global Interrupt */
HAL_NVIC_EnableIRQ(TIM2_IRQn);
/* Enable TIM2 clock */
__HAL_RCC_TIM2_CLK_ENABLE();
/* Get clock configuration */
HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);
/* Compute TIM2 clock */
uwTimclock = HAL_RCC_GetPCLK1Freq();
/* Compute the prescaler value to have TIM2 counter clock equal to 1MHz */
uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000) - 1);
/* Initialize TIM2 */
htim2.Instance = TIM2;
/* Initialize TIMx peripheral as follow:
+ Period = [(TIM2CLK/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
*/
htim2.Init.Period = (1000000 / 1000) - 1;
htim2.Init.Prescaler = uwPrescalerValue;
htim2.Init.ClockDivision = 0;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_Base_Init(&htim2) == HAL_OK)
{
/* Start the TIM time Base generation in interrupt mode */
return HAL_TIM_Base_Start_IT(&htim2);
}
/* Return function status */
return HAL_ERROR;
}
/**
* @brief Suspend Tick increment.
* @note Disable the tick increment by disabling TIM2 update interrupt.
* @param None
* @retval None
*/
void HAL_SuspendTick(void)
{
/* Disable TIM2 update Interrupt */
__HAL_TIM_DISABLE_IT(&htim2, TIM_IT_UPDATE);
}
/**
* @brief Resume Tick increment.
* @note Enable the tick increment by Enabling TIM2 update interrupt.
* @param None
* @retval None
*/
void HAL_ResumeTick(void)
{
/* Enable TIM2 Update interrupt */
__HAL_TIM_ENABLE_IT(&htim2, TIM_IT_UPDATE);
}
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/