STM32定时器捕获脉冲宽度

使用STM32CubeMX工具生成代码，并修改调试通过，测试基于正点原子阿波罗开发板。使用timer5捕获PA0端口高电平时间。

/**
  ******************************************************************************
  * @file    system_stm32f7xx.c
  * @author  MCD Application Team
  * @version V1.1.0
  * @date    22-April-2016
  * @brief   CMSIS Cortex-M7 Device Peripheral Access layer System Source File.
  *
  *   This file provides two functions and one global variable to be called from 
  *   user application:
  *      - SystemInit（）: This function is called at startup just after reset and 
  *                      before branch to main program. This call is made inside
  *                      the “startup_stm32f7xx.s“ file.
  *
  *      - SystemCoreClock variable: Contains the core clock （HCLK） it can be used
  *                                  by the user application to setup the SysTick 
  *                                  timer or configure other parameters.
  *                                     
  *      - SystemCoreClockUpdate（）: Updates the variable SystemCoreClock and must
  *                                 be called whenever the core clock is changed
  *                                 during program execution.
  *
  *
  ******************************************************************************
  * @attention
  *
  * 
© COPYRIGHT 2016 STMicroelectronics

  *
  * Redistribution and use in source and binary forms with or without modification
  * 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.
  *
  ******************************************************************************
  */

/** @addtogroup C

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件       4577  2018-12-03 08:51  TIM5_PA0CT\.mxproject

     文件     675142  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Include\stm32f745xx.h

     文件     689282  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Include\stm32f746xx.h

     文件     701585  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Include\stm32f756xx.h

     文件     711208  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Include\stm32f765xx.h

     文件     742835  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Include\stm32f767xx.h

     文件     826003  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Include\stm32f769xx.h

     文件     755138  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Include\stm32f777xx.h

     文件     838306  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Include\stm32f779xx.h

     文件       7770  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Include\stm32f7xx.h

     文件       3867  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Include\system_stm32f7xx.h

     文件      32472  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\arm\startup_stm32f745xx.s

     文件      32760  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\arm\startup_stm32f746xx.s

     文件      32949  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\arm\startup_stm32f756xx.s

     文件      34278  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\arm\startup_stm32f765xx.s

     文件      34650  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\arm\startup_stm32f767xx.s

     文件      34766  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\arm\startup_stm32f769xx.s

     文件      34788  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\arm\startup_stm32f777xx.s

     文件      34866  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\arm\startup_stm32f779xx.s

     文件      27518  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\gcc\startup_stm32f745xx.s

     文件      27703  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\gcc\startup_stm32f746xx.s

     文件      27806  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\gcc\startup_stm32f756xx.s

     文件      27829  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\gcc\startup_stm32f765xx.s

     文件      28114  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\gcc\startup_stm32f767xx.s

     文件      28213  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\gcc\startup_stm32f769xx.s

     文件      29903  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\gcc\startup_stm32f777xx.s

     文件      29993  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\gcc\startup_stm32f779xx.s

     文件       1598  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\iar\linker\stm32f745xx_flash.icf

     文件       1598  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\iar\linker\stm32f745xx_ITCM_flash.icf

     文件       1600  2016-04-28 21:52  TIM5_PA0CT\Drivers\CMSIS\Device\ST\STM32F7xx\Source\Templates\iar\linker\stm32f745xx_sram.icf

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