build synthesizer on a de2 dev fpga board

4x4鍵盤使用語法為VHDL，基於cyclone(4 x 4 keyboard using VHDL)

可以实现对任意波形分任意频，分频加减通过按键实现。-Can be achieved for any arbitrary waveform at frequency, frequency addition and subtraction through the keys to achieve.

FPGA implementation of simple Multi-tone Electronic Keyboard using DE2-115 board with a PS/2 keyboard and speaker

使用Quartus II 9.1完成俄罗斯方块游戏，只要使用有VGA和键盘接口的FPGA开发板就行实现。操作简单，使用的是VHDL和Verilog语言(Use the Quartus II 9.1 to complete the tetris game, as long as you use a VGA and keyboard interface implementation of FPGA development board. The operation is simple, the use of VHDL and the Verilog language)

基于Xilinx fpga的ddr2 控制器设计方法-Xilinx fpga-based controller design method of ddr2

运行在FPGA上的Verilog程序(实现对ADC的控制)-Verilog procedures (the achievement of the control of the ADC)

用verilog编写的lms算法。可实现自适应滤波功能(Lms algorithm written in verilog. Adaptive filtering can be achieved)

AD采集模块,设计模块采集AD5270的输出数据(AD Collection module Design module to collect the output data of AD5270 )

用VHDL硬件描述语言实现的对FPGA（Cyclone II）的配置的VHDL源代码。-VHDL hardware description language for FPGA (Cyclone II) configurations VHDL source code.

Cadence_manual_1.2.pdf