虚拟串口程序操作系统原理大作业

华科操作系统原理大作业 虚拟串口程序（汇总） 附教程 按教程更改现有demo即可实现

/**
  ******************************************************************************
  * @file    system_stm32f10x.c
  * @author  MCD Application Team
  * @version V3.6.1
  * @date    09-March-2012
  * @brief   CMSIS Cortex-M3 Device Peripheral Access layer System Source File.
  * 
  * 1.  This file provides two functions and one global variable to be called from 
  *     user application:
  *      - SystemInit（）: Setups the system clock （System clock source PLL Multiplier
  *                      factors AHB/APBx prescalers and Flash settings）. 
  *                      This function is called at startup just after reset and 
  *                      before branch to main program. This call is made inside
  *                      the “startup_stm32f10x_xx.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.
  *
  * 2. After each device reset the HSI （8 MHz） is used as system clock source.
  *    Then SystemInit（） function is called in “startup_stm32f10x_xx.s“ file to
  *    configure the system clock before to branch to main program.
  *
  * 3. If the system clock source selected by user fails to startup the SystemInit（）
  *    function will do nothing and HSI still used as system clock source. User can 
  *    add some code to deal with this issue inside the SetSysClock（） function.
  *
  * 4. The default value of HSE crystal is set to 8 MHz （or 25 MHz depedning on
  *    the product used） refer to “HSE_VALUE“ define in “stm32f10x.h“ file. 
  *    When HSE is used as system clock source directly or through PLL and you
  *    are using different crystal you have to adapt the HSE value to your own
  *    configuration.
  *        
  ******************************************************************************
  * @attention
  *
  * 
© COPYRIGHT 2012 STMicroelectronics

  *
  * Licensed under MCD-ST Liberty SW License Agreement V2 （the “License“）;
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing software 
  * distributed under the License is distributed on an “AS IS“ BASIS 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  *************************************

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    .......     11193  2013-01-22 02:27  USB demo\STM32F10xxx全速USB设备开发套件\STM32_USB-FS-Device_Lib_V4.0.0\Libraries\CMSIS\Device\ST\STM32F10x\Source\Templates\gcc_ride7\startup_stm32f10x_md_vl.s

    .......     13396  2013-01-22 02:27  USB demo\STM32F10xxx全速USB设备开发套件\STM32_USB-FS-Device_Lib_V4.0.0\Libraries\CMSIS\Device\ST\STM32F10x\Source\Templates\gcc_ride7\startup_stm32f10x_xl.s

    .......     16763  2013-01-22 02:27  USB demo\STM32F10xxx全速USB设备开发套件\STM32_USB-FS-Device_Lib_V4.0.0\Libraries\CMSIS\Device\ST\STM32F10x\Source\Templates\iar\startup_stm32f10x_cl.s

    .......     16366  2013-01-22 02:27  USB demo\STM32F10xxx全速USB设备开发套件\STM32_USB-FS-Device_Lib_V4.0.0\Libraries\CMSIS\Device\ST\STM32F10x\Source\Templates\iar\startup_stm32f10x_hd.s

    .......     15812  2013-01-22 02:27  USB demo\STM32F10xxx全速USB设备开发套件\STM32_USB-FS-Device_Lib_V4.0.0\Libraries\CMSIS\Device\ST\STM32F10x\Source\Templates\iar\startup_stm32f10x_hd_vl.s

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    .......     13049  2013-01-22 02:27  USB demo\STM32F10xxx全速USB设备开发套件\STM32_USB-FS-Device_Lib_V4.0.0\Libraries\CMSIS\Device\ST\STM32F10x\Source\Templates\iar\startup_stm32f10x_md.s

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    .......      3675  2013-01-22 02:27  USB demo\STM32F10xxx全速USB设备开发套件\STM32_USB-FS-Device_Lib_V4.0.0\Libraries\CMSIS\Device\ST\STM32F10x\Source\Templates\TASKING\cstart_thumb2.asm

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