MODELSIM的实验程序，在QUARTUSii中调用MODELSIM，实现仿真

这个是DE2上的SDRAM 四个端口的驱动代码，相当实用！(This is a four-port SDRAM on a DE2 driver code, very useful!)

说明：  LDPC码的BP译码verliong程序(BP decoding veriong program of LDPC code)

一些常见的小模块，自己写的，可能不是特别好，仅供参考，主要是分频器、计数器和数码管的显示

这是我们eda的课程大作业，用quartus仿真循环彩灯并下到板子里能完美的运行出四种波形。工程比较完整，希望对大家有帮助。

2. You may use this core in any way, be it academic, commercial, or -- military. Modified or not.-2. You may use this core in any way, be it academic, commercial, or-- military. Modified or not.

说明：  I2C完整代码，可综合，可仿真，已经过验证(I2C code can been syn and simulation ,veritify)

QUARTUS 的配置及调试 flv的 -Quartus flv configuration and commissioning of the

QuartusII8.0 Unix 和Linux按照指南-QuartusII8.0 Unix and Linux in accordance with the Guide

包含32为乘法器的设计，用verilog语言实现，包括booth编码的实现，booth乘法器的实现，3_2压缩器的实现，4_2压缩器的实现，华伦斯树的实现，以及两个testbench文件用于测试。(Contains 32 multiplier design, verilog language, including booth encoding implementations, booth multiplier implementations, 3_2 compressor implementation 4_2 compressor to achieve and realize China Clarence tree, and two testbench file with the to the test.)

直接数字式频率合成器DDS设计、Verilog。 产生的信号可以是正弦波或方波、三角波、锯齿波等，自选。 采用DDS技术，将所需生成的波形写入ROM中，按照相位累加原理合成任意波形。 此方案得到的波形稳定，精度高，产生波形频率范围大，容易产生高频。 本实验在设计的模块中，包含以下功能： （1）通过 freq 信号输入需要的频率的值； （2）通过 wave_sel 信号选择所需的波形； （3）通过 amp_adj 信号选择波形放大的倍数。(DDS design of direct digital frequency synthesizer, Verilog. The generated signal can be sinusoidal or square wave, triangular wave, sawtooth wave and so on, optional. By using DDS technology, the required waveforms are written into ROM, and arbitrary waveforms are synthesized according to the principle of phase accumulation. The waveform obtained by this scheme is stable, accurate and easy to generate high frequency waveform. This experiment includes the following functions in the designed module: (1) Input the required frequency value through freq signal; (2) Choosing the required waveform by wave_sel signal; (3) Select the multiplier of waveform amplification by amp_adj signal.)