学习单片机肯定得学习液晶屏的使用，而液晶屏的使用的第一步是不可避免的学习1602简单的液晶显示，本文介绍了1602的显示外，还增加了其滚动显示的花样-the screen of 1602 is unavoidable to learn if u want to lern the display of screen in the district of mcu .now this text mainly centers around how to use 1602 scrren .