使用查询方式，对端口串行输入序列进行检测并进行译码显示，程序中自带防抖。注释明确。北交大2015年课设作业之一的代码。-Using query mode, serial port input sequences to detect and decode the display, the program comes with image stabilization. NOTE clear. Northern Jiaotong University in 2015, one of the class