１３键键盘的ＶＨＤＬ顶层文件，我是初学着，希望对初学者有用...

编程规范是重中之重，带你书写良好的变成习惯(It is used to measure noise and detect road noise pollution. It is accurate and has good effect.)

实现了lcd1602显示的功能，可以在lcd上显示“年”字，有利于初学者学习lcd在fpga上显示，采用文本编辑的，利用quartus ii 702-Achieved lcd1602 display function, you can lcd display " " The word will help beginners learn lcd display in the fpga, using a text editor, using quartus ii 702

verilog 的东西好好用的呢，那是verilog 学习者的必备东西哦(verilog things properly used it, it is an essential learners verilog things oh)

vendingmachine vhdl code

说明：  verilog语言写的SPI接口,全同步设计,低门数,可以很容易应用到嵌入设计方案中.(Verilog language to write the SPI interface, all synchronous design, low gate count. it is very easy to use embedded design programs.)

此代码是由FPGA产生SPWM波的代码，简单易懂(use FPGA to generate SPWM)

分别用分频比交错法及累加器分频法完成非整数分频器设计。-Points were staggered method and frequency than the frequency accumulator law to complete the design of non-integer divider.

可实现两个4bit补码的加法及减法，有溢出提示(adder with overflow hint)

quartus一个完整的设计例子,从安装到实例完成，仿真等全过程，适合从0开始的初学者-Quartus a complete design examples, examples from installation to completion, the entire process of simulation, etc., suitable for the beginner to start from 0

一个用FPGA语言设计数字秒表的程序，有相关的源程序和说明-FPGA design using a digital stopwatch language of the procedures and instructions related to the source