vga编程。实现3种模式的vga控制，分别产生横彩条，竖彩条，棋格彩条的显示...

a、设计可显示横彩条和纵彩条的VGA彩条信号； b、设计可显示英语字母的VGA彩条信号； c、设计可显示移动彩色斑点的VGA彩条信号； d、设计可实现手动切换a、b、c三个功能.(The design can display VGA color color and color of the longitudinal cross signal. The design can display the VGA color signal of the English alphabet. The design can display the VGA color signal of mobile color spots.)

vhdl code for carry lookahead addder

xlinx fpga实现fft功能，利用ip核，包含源程序及完整工程文件，直接就能使用(The fft function xlinx fpga ip-core contains the source code and complete the project file, and can be used directly)

说明：  浙江大学计算机组成实验12指令扩展多周期CPU实现(The implementation of 12 instruction extended multi cycle CPU in Computer Composition Experiment of Zhejiang University)

点亮led流水灯，通过调用锁相环，可以更改对应的时钟。(Lighting the LED pipelining lamp, the corresponding clock can be changed by calling the phase-locked loop.)

基于FPGA的等精度频率计，包括工程，doc和一些查找资料(An equal precision frequency meter based on FPGA, including engineering, Doc, and some lookup data)

说明：  用MATLAB设计及FPGA实现IIR滤波器的方法 摘要 本文介绍了IIR数字滤波器的传统设计思想与步骤及计算机辅助设计方法。并在FPGA上高效实现的低阶IIR滤波 器，其阶数低，实时响应快，适合雷达等的实时、高效处理环境。利用IIR滤波器的多相结构来实现该滤波器系统的方法，对于 四通道的情形在MATLAB上利用Simulink作了仿真, 并在目标板上对算法进行了实现,证明该系统能够同时处理四个通道的信号。(Using MATLAB Design and FPGA realization IIR Filter method Abstract This paper introduces IIR digital filter traditional design Thought and steps and CAD method. And FPGA on efficient realization low IIR filter, its order low, real response fast suitable radar real time, efficient processing environment. Use IIR filter multiphase structure realize the filter systematic method, for four channel circumstances in MATLAB on use Simulink made simulation and target board algorithm was realized proved system can simultaneously four channel signal.)

用以VGA显示的小程序，很实用，挺有价值的(VGA display for a small program, very practical, quite valuable)

8051的vhdl源代码，主要针对初学者-8051 VHDL source code, mainly for beginners

spi driver: Analog Device DAC ad9788 SPI Controller