这是我自己编写的三分频，也就是奇数分频，占空比为1：1，当然如果需要其它奇数分频，只要将程序里面的N和counter修改即可...

实现在屏幕上显示绿色和红色相间的水平条纹。其中，vga_640x480模块将产生行同步信号hsyn和场同步信号 vsync; vga_stripes模块将产生red、green和blue三个输出。(The horizontal stripes of green and red are displayed on the screen. Among them, vga_640x480 module will produce line synchronization signal Hsyn and field synchronization signal vsync; vga_stripes module will produce red, green and blue three outputs.)

基于VHDL语言开发的mcu与外部器件的接口程序，解决了高速mcu与低速外部器件的接口问题。-based on VHDL development mcu with external device interface, mcu solve the high-speed and low-speed external device interface.

用窗函数法设计一个线性相位FIR数字低通滤波器，用理想低通滤波器作为逼近滤波器，通带截止频率为0.2 ，阻带截止频率为0.4 ，阻带衰减不小于-40dB。(Window function method to design a linear phase FIR digital low-pass filter, as an ideal low-pass filter for approximation filter passband cutoff frequency of 0.2 stopband cutoff frequency of 0.4, the stop-band attenuation of less than-40dB.)

用VHDL语言仿真交通灯 用VHDL语言仿真交通灯-Simulation using VHDL language VHDL language with traffic lights traffic lights Simulation

里面包含了三段代码，主要是用matlab产生高斯随机信号以及高斯白噪声和色噪声，然后计算其数字特征及对这些信号进行频谱分析和功率谱分析，里面还有关于低通滤波器的设计的简单说明(Which contains three sections of code using matlab Gaussian random signals and white Gaussian noise and color noise, and then to calculate the numerical characteristics and spectral analysis and power spectral analysis of these signals, there is also the low-pass filter design BRIEF DESCRIPTION OF)

交通灯控制系统VHDL源码，用VHDL语言、MAXPLUS2环境设计实现(VHDL core)

a power point presentation presenting how to impliment EMF and GMF with DDS

DE2将连接到LCD布局上，为Terasic off技术公司附上系统代码

本代码绝对真实可靠，VHDL语言写的FPGA呼吸灯。大家可以参考学习，对于VHDL入门还是很有帮助的。库 ieee ； 使用 ieee.std_logic_1164.all ； 使用 ieee.std_logic_arith.all ； 使用 ieee.std_logic_unsigned.all ；已通过编译，已实现呼吸灯功能。 

In communication systems channel poses an important role. channels can convolve many different kind of distortions to our information. In perticular wireless channels multipath distortion is sevear. and more sevear is such distortion is random. To handle this, multipath affected channels require Equalizers at receaver end. such equalizer uses different learning Algorithms for identifying channels continuously. This project is VHDL implementation of LMS learning algorithm with pipelined architecture. so this implementation can work with higher data rates with less clock speed requirments and so with less power consumpiton It uses Fixed point arithmatic blocks for filtering so suitable for coustom asic.