用C语言，采用结构体方式，实现液晶LCD的多级菜单显示和级联-With the C language, using structure approach to achieve multi-stage liquid crystal LCD display, and cascading menus

用单片机驱动LCD12864，可以进行多级菜单显示，灵活多变。(LCD12864 with single-chip drive, you can multi-level menu display, flexible and changeable.)

旋转编码开关实现液晶屏的多级菜单显示，很实用，大家可以一起学习一下，有什么地方需要更改可以提出来。(Rotary encoding switch to achieve LCD screen multi-level menu display, very practical, we can learn together, what places need to change, you can put forward.)