单片机开发，Keil打开旧工程，进行编译报错：error: #5: cannot open source input file “system_stm32f10x.h“: No such file

一、问题描述

单片机开发，Keil打开旧工程，进行编译报错如下：

*** Using Compiler 'V5.06 update 6 (build 750)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin' Rebuild target 'harmful_gas_detector' compiling stm32f10x_can.c... .\CMSIS\DeviceSupport\stm32f10x.h(479): error:  #5: cannot open source input file "system_stm32f10x.h": No such file or directory   #include "system_stm32f10x.h" STM32F10x_StdPeriph_Driver\src\stm32f10x_can.c: 0 warnings, 1 error compiling misc.c... .\CMSIS\DeviceSupport\stm32f10x.h(479): error:  #5: cannot open source input file "system_stm32f10x.h": No such file or directory   #include "system_stm32f10x.h" STM32F10x_StdPeriph_Driver\src\misc.c: 0 warnings, 1 error assembling startup_stm32f10x_cl.s... compiling stm32f10x_adc.c... .\CMSIS\DeviceSupport\stm32f10x.h(479): error:  #5: cannot open source input file "system_stm32f10x.h": No such file or directory   #i