等精度测试频率计，包括程序源代码以及相关注释

使用VHDL进行分频器设计，主要是一些分频的东西，整数分频，小数分频，奇次分频和偶次分频-Divider using VHDL to design, mainly because some sub-band stuff, integer divider, fractional-N, odd and even sub-sub-sub-sub-band frequency

I2C IP for Quartus V9.0 sp2, can used in SOPC builder.

通过代码控制音频编/解码硬件芯片WM8731， 通过按键控制音频输出的音量(Audio codec hardware chip WM8731 is controlled by code, and audio output volume is controlled by keys.)

VDHL的简单DEMO演示，有利于初学者学习使用(VDHL simple demo DEMO will help beginners learn to use)

24位x24位的乘法器 十分详细24位x24位的乘法器24位x24位的乘法器24位x24位的乘法器24位x24位的乘法器24位x24位的乘法器24位x24位的乘法器24位x24位的乘法器24位x24位的乘法器(24-bit x24-bit multiplier very detailed 24-bit x24-bit 24-bit x24-bit multiplier of the multiplier 24-bit x24-bit 24-bit x24-bit multiplier of the multiplier 24-bit x24-bit 24-bit x24-bit multiplier of the multiplication Explorer 24-bit x24 multiplier 24-bit x24-bit multiplier)

良好的Coding Style能减少Bug，减少锁存器出现的可能以及其他隐藏逻辑错误，也有助于减小芯片面积或所用资源(Good Coding Style can reduce Bug, reduce the possibility of latches and other hidden logic errors, and also help to reduce chip area or resources used.)

fsk在matlab上的仿真实现，一段简单的代码小程序(fsk on matlab simulation in the implementation of a simple small program code)

《数字电路EDA入门－VHDL程序实例》---交通灯程序例子-"digital circuit EDA portal-VHDL program examples"-- traffic lights procedures example

binary adder / subtracter in vhdl

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