用VHDL写的4*4乘法器，学习VHDL语言的可以

关于语音通信信道调制的程序代码，是论文的仿真程序(About voice communication channel modulation code, the authors of the paper simulation program)

说明：  1、能正确显示输入信号频率； 2、测量频率范围为1Hz ~ 999999Hz； 3、测量结果以十进制数字显示； 4、能测量幅值较小的信号频率； 5、有自动刷新输出数据的功能（如5s刷新一次）； 6、有自检模块（如产生100Hz的校准方波）；(1. It can correctly display the input signal frequency; 2. The frequency range of measurement is 1Hz ~ 99999hz; 3. The measurement results are displayed in decimal; 4. It can measure signal frequency with small amplitude; 5. It has the function of automatically refreshing the output data (e.g. once in 5S); 6. Self checking module (such as generating 100Hz calibration square wave);)

Xilinx开发板ML505的DDRII示例程序，使用Verilog，调用MIG，编译环境ISE11.1(Xilinx ML505 development board of DDRII sample program, using Verilog, called MIG, build environment ISE11.1)

Laurent程序,用于CPM信号的调制,接收和分解,译码,以及判断(Laurent procedures for CPM modulation of the signal, and decomposition receiving, decoding, and to determine)

汽车在防撞雷达方向的研究的详细原理的介绍(Introduction of detailed schematic of the car in the direction of the anti-collision radar)

用Verilog描述了一款简单逻辑芯片74HC595的功能该芯片功能为：带输出锁存的8位移位寄存器(use the verilog to describe a simple chip 74HC595 with 8-Bit Serial-In, Parallel-Out Shift Reg and High-Current 3-State Outputs Reg)

Demo 使用 PmodHMT 模块实时检测环境温度和湿度。(The Demo uses PmodHMT modules to detect environmental temperature and humidity in real time.)

VHDL_COUNTING 000_255 液晶显示器 (ĐẾM 000 ĐẾN 255 HIỂN THỊ 液晶电视 BẰNG NGÔN NGỮ VHDL)

设计一个可容纳四组参赛的数字式抢答器，每组设一个按钮供抢答使用。抢答器具有第一信号鉴别和锁存功能，使除第一抢答者外的按钮不起作用；设置一个主持人“复位”按钮，主持人复位后，开始抢答，第一答对一次加1分，答错一次减1分

设计含异步清零和同步时钟使能的加法计数器-Clear design with asynchronous and synchronous clock so that the adder counter