8 位修改 Booth 型乘法器

用verilog hdl 硬件描述语言写的一个范例程序，led的，扩展性极强，欢迎大家下载使用。-Verilog hdl using hardware description language to write an example of the procedure, led, and highly scalable, welcome to download.

基于FPGA cyclone III EP3C16F484C6的俄罗斯方块游戏。实现双人进行，屏幕倒置，分数显示，vga接口，键盘接口等功能(Tetris game based on FPGA cyclone III EP3C16F484C6 with functions including double players, screen upside down, score, vga and keyboard interface.)

4位电子密码锁，带键盘扫描、按键防抖动、LCD驱动编译码-four electronic password lock with a keyboard scan button shake, LCD driver encryption

附件 介绍了如何 使用compxlib命令编译Xilinx的ModelSim仿真库，创建这个仿真库对ISE调用modelsim是必不可少的一步,该法完全自动化，免去繁杂的手动操作，是创建这个仿真库最简洁的方法之一-Annex compxlib introduce how to use Xilinx

acousting fingerprint enhancement

使用FPGA来控制DDS信号的产生，从而达到高频信号产生的目的。使用的DDS芯片为AD9852，在QuartusII下编写。(Using the FPGA to control the DDS signal generation, so as to achieve high-frequency signal generation purposes. Use of DDS chip AD9852, in the QuartusII prepared.)

说明：  用verilog语言实现计算反正切函数，在软件无线电中解调PM/FM中使用的尤为频繁。上传的压缩包是modelsim工程，基于6.5c,里边包含一个完整的PM波产生以及解调过程的matlab文件仿真，并取其中间的I和Q支路做为verilog文件的输入，并将其借条输出与MATLAB实际解调输出作比较。 鉴相器的设计基于CORDIC算法，其精度取决于迭代的深度。由于工程实际运用只需要解调出atan值，并不需要绝对的值，所以并没有给予加权，需要的同学可以自己加上。(Calculated using verilog language arc tangent function, the software radio demodulation PM/FM is particularly used frequently. From the archive is modelsim project, based on 6.5c, inside the PM contains a complete demodulation process of wave generation and simulation matlab file, and whichever is the middle of the I and Q branch verilog file as input, and its IOU demodulated output and actual output of MATLAB for comparison. Phase detector design is based on CORDIC algorithm, its accuracy depends on the iteration depth. As the practical application of engineering demodulated atan value only and does not need absolute value, and there is no weight given to the need of the students can add their own.)

基于CPLD 的光电脉冲码盘 信号四倍频电路设计-CPLD-based electro-optical pulse encoder signals four multiplier circuit design

ＶＨＤＬ编写的flash控制器源代码.包含testbench。-Prepared by flash controller VHDL source code. Contains testbench.

控制器灯具有线和无线控制器采用STC11F02做的(Controller for lamp wired and wireless controller using STC11F02 to do)