本实验主要完成的实验是完成4×4键盘扫描的，然后获取其键值，并对其进行编码，从而进行按键的识别，并将相应的按键值进行显示。-This experiment is to complete 44 experiments done keyboard scan, and then get their keys, and encode to carry identification keys, and the corresponding key value to be displayed.