用VHDL语言编程完成数码管0

USB接口控制器参考设计VHDL代码,方便开发FPGA人员进行USB的开发，是一个不错的源码。-USB interface controller reference design VHDL code, facilitate the development of FPGA personnel USB development, is a good source.

实现千兆以太网数据发送，通过GMII接口向PHY写数据，控制PHY发送数据。(Implementation of Gigabit Ethernet data transmission, write data to the PHY through the GMII interface, control PHY data.)

用verilog 语言编译16QAM调制(a great complied code of 16QAM modulation for OFDM)

EDA的交通信号灯的控制系统的程序,设计一个交通信号灯控制器，由一条主干道和一条支干道汇合成十字路口，在每个入口处设置红、绿、黄三色信号灯，红灯亮禁止通行，绿灯亮允许通行，黄灯亮则给行驶中的车辆有时间停在禁行线外。(EDA traffic lights control system procedures)

说明：  实现主干道交通灯显示，以状态机程序实现，并用数码管进行红绿灯倒计时的显示，内置计数模块，交通灯控制模块，数码管显示模块，并对各模块用电路图的方式进行连接。对于学习VHDL语言有所帮助。(The main road traffic light display is realized by the state machine program, and the digital tube is used to display the traffic light countdown. The counting module, the traffic light control module and the digital tube display module are built in, and each module is connected by the circuit diagram. It is helpful for learning VHDL.)

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.)

基于VHDL语言开发的I486总线接口程序。实现了一个三态的总线，可保证数据的正常传输。-based on VHDL development of the I486 bus interface procedures. Implementation of a three-state bus can ensure that the normal data transmission.

vhdl source code for 8 bit datapath logic

很有用的10bit串并转换verilog程序，需要的可以拿去参考下，在quartusII上已验证过(Useful 10bit string and convert verilog program, need to take a reference, has been verified in quartusII)

定时器加数码管显示源码，以及test bench测试模块源码，经modelsim仿真结果正确(Timer plus digital display source code, and test bench test module source code, by modelsim simulation results are correct)