8位可调数码管动态显示模块 注：将里面的reg52.h的头文件复制进自己的keil头文件库中才能运行，里面有自定义的内容（自定义部分有标注），运行环境为keil uvision-8 adjustable digital dynamic display module NOTE: The inside reg52.h header files copied into its own header file keil library in order to run, which has a cus