用VHDL语言编写的代码，以供大家学习和交流，方便大家学习！...

使用verilog实现全数字16QAM调制器，载波频率1MHZ，数据比特流的速率为100Kbps,(the modulation of 16QAM based on FPGA)

PCIe demo sample code

用verilog hdl硬件描述语言实现多人抢答器功能，有计时，计分，报警等功能。-Using hardware description language verilog hdl people realize Answer feature, have timing, scoring and alarm functions.

基于有限状态机的健壮性测试研究。 关键词：健壮性测试；增强有限状态机；全球平台；安全通道协议(The Research of Robustness Testing Based on FSM)

说明：  基于FPGA的USB接口设计，实现了USB与FPGA的通信(USB interface to FPGA-based design, implementation of the USB communication with the FPGA)

DDR控制器的VHDL源代码.采用FPGA实现DDR接口控制器,适用于Altera的FPGA,最高频率可到100M-DDR controller VHDL source code. Using FPGA DDR interface controller, applicable to Altera FPGA, the highest frequency available 100M

这是本人自己编写的可用于256*256大小的图像进行sobel边缘检测的vhd文件，可在QuartusII或MaxplisII下综合和仿真，并在FPGA上测试过。可以进行修改支持其他大小图像的sobel边缘检测，同时还可以实现其它的图像模块化处理算法，例如高斯滤波，平滑等。(this is my own preparation for the 256* 256 size of the image segmentation Edge Detection vhd document in the next QuartusII or MaxplisII integrated and simulation, and the FPGA tested. Can be adapted to support other size image segmentation edge detection, It can also achieve other modular image processing algorithms, such as Gaussian filtering, smoothing and so on.)

微波炉定时器集成电路的设计 1、 控制状态机：工作状态状态转换。 2、 数据装入电路：根据控制信号选择定时时间、测试数据或完成信号的装入。 3、 定时器电路：负责完成烹调过程中的时间递减计数和数据译码供给七段数码显示，同时还可以提供烹调完成时间的状态信号供控制状态机产生完成信号。 -microwave timer IC design a control state machine : state of the state conversion work. 2, data loading circuit : According to choose control signal timing, or the completion of the test data signal load. 3, timer circuit : responsible for the completion of the cooking process of counting and time decreasing supply data decoding digital paragraph 107, while cooking can also provide time to complete state control signal for the state machine generated signals.

wm8731的使用，用于音频信号的采集或者产生(wm8731 use for audio signal acquisition or produce)

VHDL常用实例，适合初学者，有计时器等常用例子-Common examples of VHDL, suitable for beginners, there are examples of commonly used timer, etc.