157 lines
5.6 KiB
C
157 lines
5.6 KiB
C
/**
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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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*
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* COPYRIGHT(c) 2016 STMicroelectronics
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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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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/** @addtogroup STM32F7xx_HAL_Examples
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* @{
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*/
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/** @addtogroup HAL_TimeBase
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* @{
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*/
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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 htim1;
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uint32_t uwIncrementState = 0;
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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 TIM1 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 priorty.
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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 TIM1 IRQ priority */
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HAL_NVIC_SetPriority(TIM1_UP_TIM10_IRQn, TickPriority ,0);
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/* Enable the TIM1 global Interrupt */
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HAL_NVIC_EnableIRQ(TIM1_UP_TIM10_IRQn);
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/* Enable TIM1 clock */
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__HAL_RCC_TIM1_CLK_ENABLE();
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/* Get clock configuration */
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HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);
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/* Compute TIM1 clock */
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uwTimclock = 2*HAL_RCC_GetPCLK2Freq();
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/* Compute the prescaler value to have TIM1 counter clock equal to 1MHz */
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uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000) - 1);
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/* Initialize TIM1 */
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htim1.Instance = TIM1;
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/* Initialize TIMx peripheral as follow:
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+ Period = [(TIM1CLK/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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htim1.Init.Period = (1000000 / 1000) - 1;
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htim1.Init.Prescaler = uwPrescalerValue;
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htim1.Init.ClockDivision = 0;
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htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
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if(HAL_TIM_Base_Init(&htim1) == 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(&htim1);
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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 TIM1 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 TIM1 update Interrupt */
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__HAL_TIM_DISABLE_IT(&htim1, 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 TIM1 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 TIM1 Update interrupt */
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__HAL_TIM_ENABLE_IT(&htim1, TIM_IT_UPDATE);
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}
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/**
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* @brief Period elapsed callback in non blocking mode
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* @note This function is called when TIM1 interrupt took place, inside
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* HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
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* a global variable "uwTick" used as application time base.
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* @param htim : TIM handle
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* @retval None
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*/
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void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
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{
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HAL_IncTick();
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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