此ip核是xvga视频接口控制器，主要针对xilinx公司的开发工具

基于ALtera公司的若干款FPGA的调试经验，对初学者有重要价值-ALtera a number of sections based on the company" s FPGA debugging experience, great value for beginners

本代码介绍了使用VHDL开发FPGA的一般流程，最终采用了一种基于FPGA的数字频率的实现方法。该设计采用硬件描述语言VHDL，在软件开发平台ISE上完成，可以在较高速时钟频率（100MHz）下正常工作。该设计的频率计能准确的测量频率在1Hz到100MHz之间的信号。使用ModelSim仿真软件对VHDL程序做了仿真，并完成了综合布局布线，最终下载到芯片Spartan-II上取得良好测试效果。-the code on the FPGA using VHDL development of the general process, finally adopted a FPGA-based digital frequency method. The design using VHDL hardware description language, the software development platform ISE completed, the higher speed clock frequency (100MHz) under normal work. The design of the frequency meter can be accurately measured in a frequency of 100MHz between Hz signal. Use ModelSim VHDL simulation software to do the simulation process, and completed a comprehensive layout cabling, downloaded to the final chip Spartan-II made good on the test results.

基于ＦＰＧＡ平台，实现了直接数字频率合成。-FPGA-based platform, to achieve a direct digital frequency synthesis.

基于DB8小波变换的verilog代码设计，支持Avalon总线(Verilog DB8 Wavelet Transform Based on code design, support Avalon bus)

一个用于锁相环开发的资料，请作为参考！-A phase-locked loop for the development of the information, please as a reference!

说明：  一个小寄存器堆，使用参数化编程，附有仿真代码，可直接在vivado（2018.2版本及以后）上运行(A small register heap, using parametric programming)

基于FPGA 16QAM解调verilog代码，(16QAMdemoluator veriliog)

controller for sending serial data at different speeds

ssb的调制与解调，包括信号的产生、乘法器、加噪、BPF、解调等部分。(ssb modulation and demodulation, signal generation, multiplier, adding noise, BPF, demodulation section.)

设计制作一个检测4*4矩阵键盘的按键编码的实验，把实际按键的键值的八位编码先转换成从0000—1111的编码，再译成数码管能识别的八位编码，在数码管动态显示时，4*4矩阵键盘的第一行对应00—03，第二行对应04—07，第三行08—11，第四行对应12—15。(Design a 4* 4 matrix keyboard key coding experiments to detect the key the actual key octet coded first convert from 0000-1111 encoding, and then translated into digital tube to identify the eight coding, digital tube dynamic display, the first line of the 4* 4 matrix keyboard corresponding to 00-03, the second line corresponds to 04-07, the third line of 08-11, the fourth line corresponds to 12-15.)