基于DE2实验板，Quartus6.0开发环境，驱动两行液晶，其中分频值可以设置的更小一些，调试成功，编译下载即可。-Based on the DE2 board, Quartus6.0 development environment, drive a two-line LCD, which can set the frequency value of the even smaller number, debug successfully, the compiler can be downloa