STM32 CubeMX输入捕获测量PWM的频率和占空比

使用CubeMX生成PWM波形，并且进行PWM波形的频率和占空比测量，使用硬件来进行两次捕获，降低代码的工作量。

/**
  ******************************************************************************
  * @file    stm32f4xx_hal.c
  * @author  MCD Application Team
  * @brief   HAL module driver.
  *          This is the common part of the HAL initialization
  *
  @verbatim
  ==============================================================================
                     ##### How to use this driver #####
  ==============================================================================
    [..]
    The common HAL driver contains a set of generic and common APIs that can be
    used by the PPP peripheral drivers and the user to start using the HAL. 
    [..]
    The HAL contains two APIs‘ categories: 
         （+） Common HAL APIs
         （+） Services HAL APIs

  @endverbatim
  ******************************************************************************
  * @attention
  *
  * 
© COPYRIGHT（c） 2017 STMicroelectronics

  *
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  * are permitted provided that the following conditions are met:
  *   1. Redistributions 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 its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS“
  * AND ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING BUT NOT LIMITED TO THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 “stm32f4xx_hal.h“

/** @addtogroup STM32F4xx_HAL_Driver
  * @{
  */

/** @defgroup HAL HAL
  * @brief HAL module driver.
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define -----------------------------------

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-05-29 14:08  STM32F4_PWM\
     目录           0  2018-05-29 14:08  STM32F4_PWM\PWM_Test\
     文件        4783  2018-05-29 14:08  STM32F4_PWM\PWM_Test\.mxproject
     目录           0  2018-05-29 10:41  STM32F4_PWM\PWM_Test\Drivers\
     目录           0  2018-05-29 14:08  STM32F4_PWM\PWM_Test\Drivers\CMSIS\
     目录           0  2018-05-29 10:41  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Device\
     目录           0  2018-05-29 10:41  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Device\ST\
     目录           0  2018-05-29 14:08  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Device\ST\STM32F4xx\
     目录           0  2018-05-29 14:08  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Device\ST\STM32F4xx\Include\
     文件     1253519  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Device\ST\STM32F4xx\Include\stm32f412zx.h
     文件       10744  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Device\ST\STM32F4xx\Include\stm32f4xx.h
     文件        3796  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Device\ST\STM32F4xx\Include\system_stm32f4xx.h
     目录           0  2018-05-29 14:08  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Device\ST\STM32F4xx\Source\
     目录           0  2018-05-29 14:08  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Device\ST\STM32F4xx\Source\Templates\
     目录           0  2018-05-29 14:08  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\
     文件        7265  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\arm_common_tables.h
     文件        3942  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\arm_const_structs.h
     文件      252339  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\arm_math.h
     文件       24423  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\cmsis_armcc.h
     文件       55083  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\cmsis_armcc_V6.h
     文件       41435  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\cmsis_gcc.h
     文件       37218  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\core_cm0.h
     文件       44796  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\core_cm0plus.h
     文件      103909  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\core_cm3.h
     文件      114498  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\core_cm4.h
     文件      139660  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\core_cm7.h
     文件        3620  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\core_cmFunc.h
     文件        3636  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\core_cmInstr.h
     文件        3662  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\core_cmSimd.h
     文件       45262  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\core_sc000.h
     文件      102809  2018-05-23 13:03  STM32F4_PWM\PWM_Test\Drivers\CMSIS\Include\core_sc300.h
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