实现LCD1602的字符数字字母等显示功能，结合VHDL语言在Q2下实现,Achieve LCD1602 alphanumeric characters, such as digital display, combined with VHDL language to achieve in Q2

用VHDL语言实现点阵显示，并自带初步的显示数字和字母库，稍加修改即可使用-Dot matrix display with VHDL language。And comes with an initial display of numbers and letters library, you can use a slightly modified