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151 lines
6.2 KiB
C
151 lines
6.2 KiB
C
/**
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******************************************************************************
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* @file stm32wbxx_hal_timebase_tim.c
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* @author MCD Application Team
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* @brief HAL time base based on the hardware TIM.
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*
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* This file overrides the native HAL time base functions (defined as weak)
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* the TIM time base:
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* + Intializes the TIM peripheral to generate a Period elapsed Event each 1ms
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* + HAL_IncTick is called inside HAL_TIM_PeriodElapsedCallback ie each 1ms
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*
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@verbatim
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==============================================================================
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##### How to use this driver #####
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==============================================================================
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[..]
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This file must be copied to the application folder and modified as follows:
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(#) Rename it to 'stm32g0xx_hal_timebase_tim.c'
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(#) Add this file and the TIM HAL driver files to your project and make sure
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HAL_TIM_MODULE_ENABLED is defined in stm32wbxx_hal_conf.h
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[..]
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(@) The application needs to ensure that the time base is always set to 1 millisecond
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to have correct HAL operation.
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@endverbatim
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2019 STMicroelectronics</center></h2>
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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 "stm32wbxx_hal.h"
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#include "stm32wbxx_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 htim17;
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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 TIM17 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 TIM17 IRQ priority */
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HAL_NVIC_SetPriority(TIM1_TRG_COM_TIM17_IRQn, TickPriority ,0);
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/* Enable the TIM17 global Interrupt */
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HAL_NVIC_EnableIRQ(TIM1_TRG_COM_TIM17_IRQn);
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/* Enable TIM17 clock */
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__HAL_RCC_TIM17_CLK_ENABLE();
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/* Get clock configuration */
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HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);
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/* Compute TIM17 clock */
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uwTimclock = HAL_RCC_GetPCLK2Freq();
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/* Compute the prescaler value to have TIM17 counter clock equal to 1MHz */
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uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000) - 1);
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/* Initialize TIM17 */
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htim17.Instance = TIM17;
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/* Initialize TIMx peripheral as follow:
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+ Period = [(TIM17CLK/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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htim17.Init.Period = (1000000 / 1000) - 1;
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htim17.Init.Prescaler = uwPrescalerValue;
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htim17.Init.ClockDivision = 0;
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htim17.Init.CounterMode = TIM_COUNTERMODE_UP;
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if(HAL_TIM_Base_Init(&htim17) == 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(&htim17);
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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 TIM17 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 TIM17 update Interrupt */
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__HAL_TIM_DISABLE_IT(&htim17, 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 TIM17 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 TIM17 Update interrupt */
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__HAL_TIM_ENABLE_IT(&htim17, TIM_IT_UPDATE);
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}
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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