STM32串口中断接收HAL库

简介：STM32与上位机之间用通信协议（自己定义）进行串口通信。怎么判断上位机发过来的指令是正确的，而不是一串乱码？怎么从正确的指令中提取出想要的命令代号，从而实现想要的功能？ 方法：读取上位机发来的命令，逐位判断命令的包头和包尾，如果能对应上，则这串指令是正确的，然后从指令中提取想要的数据和命令等。举个栗子：通信协议是自己定义的，不是modbus协议等。。如F0 5A 15 15 25 16 09 02 12 14 FF A5 F0（都是16进制），F0 5A是包头，A5 F0是包尾，黑色15是命令代号，中间蓝色是我想发的数据，橙色FF是校验位。只要包头包尾校验正确，基本这串指令不会有问题。

/**
  ******************************************************************************
  * @file    system_stm32l0xx.c
  * @author  MCD Application Team
  * @version V1.7.1
  * @date    25-November-2016
  * @brief   CMSIS Cortex-M0+ 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_stm32l0xx.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（c） 2016 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.
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  * 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.
  *
  ******************************************************************************
  */

/** @addto

 属性            大小     日期    时间   名称
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     文件       4640  2018-06-15 21:20  Receive_it\.mxproject

     文件     490933  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l011xx.h

     文件     502148  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l021xx.h

     文件     503392  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l031xx.h

     文件     514607  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l041xx.h

     文件     518739  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l051xx.h

     文件     616127  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l052xx.h

     文件     629289  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l053xx.h

     文件     529954  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l061xx.h

     文件     627342  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l062xx.h

     文件     640504  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l063xx.h

     文件     539799  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l071xx.h

     文件     646331  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l072xx.h

     文件     659701  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l073xx.h

     文件     551014  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l081xx.h

     文件     657546  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l082xx.h

     文件     670916  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l083xx.h

     文件       8393  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\stm32l0xx.h

     文件       3922  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Include\system_stm32l0xx.h

     文件      10891  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Source\Templates\arm\startup_stm32l011xx.s

     文件      11166  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Source\Templates\arm\startup_stm32l021xx.s

     文件      10431  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Source\Templates\arm\startup_stm32l031xx.s

     文件      10681  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Source\Templates\arm\startup_stm32l041xx.s

     文件      11017  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Source\Templates\arm\startup_stm32l051xx.s

     文件      11204  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Source\Templates\arm\startup_stm32l052xx.s

     文件      11278  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Source\Templates\arm\startup_stm32l053xx.s

     文件      11029  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Source\Templates\arm\startup_stm32l061xx.s

     文件      11215  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Source\Templates\arm\startup_stm32l062xx.s

     文件      11273  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Source\Templates\arm\startup_stm32l063xx.s

     文件      11325  2017-08-05 09:48  Receive_it\Drivers\CMSIS\Device\ST\STM32L0xx\Source\Templates\arm\startup_stm32l071xx.s

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