dds

AD73311芯片的控制和数据程序，用于控制音频AD芯片。(AD73311 chip control and data program)

ufm 演示关于格 CPLD，使用这个项目，可以使用关于格 CPLD 国米闪光

spartan-3e vhdl fpga 输入用滑动按钮代替 输出用led代替(spartan-3e VHDL fpga input with sliding button instead of the output with led instead)

利用verilog驱动LCD1602 本实验是用LCD1602显示英文。（LCD带字库）(//Use verilog driver LCD1602// video tutorial for all of us 21EDA e-learning board// The experiment is LCD1602 display in English. (LCD with font))

Encryption has become a part and parcel of our lives and we have accepted the fact that data is going to encrypted and decrypted at various stages. However, there is not a single encryption algorithm followed everywhere. There are a number of algorithms existing, and I feel there is a need to understand how they work. So this text explains a number of popular encryption algorithms and makes you look at them as mathematical formulas.

xilinx FPGA设计需要的DDR2文件，可以应用于实际设计中(xilinx FPGA design needs DDR2 files that can be applied to the actual design)

应用背景使用Verilog编写的sdram猝发读写程序，经测试可使用，猝发读写长度为8,16位的sdram接口。可应用与图像接收和处理平台。关键技术采用猝发的方式读写sdram，使得sdram的频率大大提高，完全可以应用于图像等处理平台中。测试过完全没有问题。

时间同步后即可确定每帧数据的起始位置，这样就能完整的截取下每一帧。但是，数据中还带有频偏信息。在常规的通信系统中，多普勒很小仅仅会带来很小的频偏，但是在大多普勒的情况下，频偏将非常大，20马赫的速度将会带来将近34K的频偏。因此，如何很好的纠正频偏即为本系统的难点。 OFDM中，我们将大于子载波间隔倍数的频偏称为整数倍频偏，而将小于一个子载波间隔的频偏称为小数倍频偏。频偏矫正精度只要能保证小于十分之一倍的子载波间隔，频偏就不会对均衡和解调造成影响。本文中我们借鉴这种思想，由于硬件资源限制，我们将在接收端做64点FFT，即相当于将频域划分为64份，我们将小于 的频偏称为小数倍频偏，将 整数倍的频偏称为整数倍频偏。本程序即基于SCHIMDL经典方法完成小数倍频偏纠正(After time synchronization can determine the starting position of each frame data, so you can complete the interception of each frame. However, in the data with frequency information. In conventional communication systems, doppler small will bring only small deviation, but in the case of most of the doppler, frequency PianJiang is very large, 20 Mach speed will lead to deviation of nearly 34 k. Therefore, how to good to correct deviation is the difficulty of this system. OFDM, we will be bigger than the sub-carrier spacing ratio of frequency deviation is called the integer frequency offset, and the interval will be less than a child carrier frequency offset is called decimal frequency doubling. Deviation is less than one over ten times as long as can guarantee accuracy of sub-carrier spacing, deviation will not affect balance and demodulation. This article, we draw lessons from the idea, due to the limited hardware resources, we will do 64 points FFT at the receiving end, which is equ)

流水线乘法器与加法器 开发环境：Modelsim（verilog hdl）(Multiplier and adder pipeline development environment: Modelsim (verilog hdl))

写一个单周期处理器运行一段mips指令，并包含mips指令转汇编码的程序(Write a single cycle processor to run a section of MIPS instruction)