一个AD9226芯片的驱动，用FPGA写的。虽然简单，但是希望对各位有帮助(An AD9226 chip driver, FPGA written. Though simple, but I hope you will help)

说明：  serdes中的8B/10B编码 verilog实现(Implementation of 8B / 10B coding Verilog)

FIR有限冲击响应下带通滤波器的构建及滤波器仿真（通过matlab和simulink两种方法实现）(FIR finite impulse response bandpass filter and filter simulation (via two methods matlab and simulink))

It is Synopsys dmac controller databook

使用FPGA测量频率大小，并且在数码管上进行显示(Frequency measurement using FPGA and display on digital tube)

VHDL is defined by IEEE Standard 1076, IEEE Standard VHDL Language Reference Manual (the VHDL LRM). The original standard was approved in 1987. IEEE procedures require that standards be periodically reviewed and either reaffirmed or revised. The VHDL standard was revised in 1993, 2000, and 2002. In each revision, new language features were added and some existing features enhanced. The aim in each revision was to improve the language as a tool for design and verification of digital systems. Since the 2002 revision, there have two parallel efforts to further develop the language. The first was the VHDL Procedural Interface (VHPI) Task Force, a subcommittee of the IEEE P1076 Working Group. The VHPI Task Force prepared an interim amendment to the standard, formally approved by IEEE in March 2007. The amendment is titled IEEE 1076c, Standard VHDL Language Reference Manual―Amendment 1: Procedural Language Application Interface.

设计一个控制十字路口的交通信号灯。 某大学决定在校园学术路文化路交汇处安装交通灯，以控制交通。两套交通信号灯，redA，yellowA，greenA和redC，yellowC，greenC分别安装在学术路上和文化路上。两个传感器TA和TC分别安装在这两条路上。如果有交通，每个传感器都会显示为TRUE，如果街道为空，则表示FALSE。 当控制器复位时，学术路的绿灯亮，文化路上为红灯亮。 每5秒钟，控制器检查流量传感器并决定下一个状态。只要学术大楼出现交通，即TA=1，绿灯亮；当学术大街上无交通， 黄灯亮5秒钟，然后变成红灯，同时文化路上绿灯亮。 在这种状态下，每5秒控制器检查文化路上的交通传感器。只要文化路上有交通就保持绿灯亮。如果没有交通，绿灯会变成黄灯，最后变成红灯。

一个cpu的vhdl语言程序。非常好的 一个cpu的vhdl语言程序。非常好的-A cpu of the VHDL language program. A very good cpu the VHDL language program. Very good

移位乘法器的输入为两个4位操作数a和b，启动乘法器由stb控制，clk信号提供系统定时。乘法器的结果为8位信号result,乘法结束后置信号done为1. 乘法算法采用原码移位乘法，即对两个操作数进行逐位的移位相加，迭代4次后输出结果。具体算法： 1. 被乘数和乘数的高位补0，扩展成8位。 2. 乘法依次向右移位，并检查其最低位，如果为1，则将被乘数和部分和相加，然后将被乘数向左移位；如果为0，则仅仅将被乘数向左移位。移位时，被乘数的低端和乘数的高端均移入0. 3. 当乘数变成全0后，乘法结束。 -err

maxplus2为开发环境 vhdl编写的自由 计数器 程序-maxplus2 VHDL environment for the development of free counter preparation procedures