[开发工具]VSCODE（Visual Studio Code）编写C51代码，环境配置，实现自动补全，C51关键字处理方法

vscode: ctrl + shift + p,输入>edit configurations 选择后面是JSON的项运行，生成c_cpp_properties.json配置文件
defines：字段定义C51特有关键字，数据类型转为C数据类型，其他关键字加“=”号即可。这样配置之后C51特有关键字定义的数据类型就不会报错，并且可以自动补全。

includePath:字段添加工程代码路径，因使用到了Keil相关文件所有也要添加"C:\Keil\C51\INC"。

{
    "configurations": [
        {
            "name": "Win64",
            "cStandard": "c11",
            "cppStandard": "c++14",
            "compilerPath": "C:\\Program Files\\LLVM\\bin\\clang.exe",
            "intelliSenseMode": "clang-x86",
            "compileCommands": "${default}",
            "defines": [
                "_DEBUG",
                "UNICODE",
                "_UNICODE",
                
                "_GLOBAL_C_",
                "interrupt=",
                "xdata=",
                "data=",
                "sbit=char",
                "sfr=char",
                "bit=u8"
            ],
            "includePath": [                
                "${workspaceFolder}/Debug",
                "${workspaceFolder}/Inc",
                "${workspaceFolder}/Device driver",
                "${workspaceFolder}/Device driver/I2C",
                "${workspaceFolder}/Device driver/Mcu",
                "C:\\Keil\\C51\\INC"       
            ]            
        }
    ],
    "version": 4
}