This is a simple routine FPGA is mainly based on FPGA

wishbone 源代码，opencore-wishbone source code, opencore

提供了100个vhdl硬件编程语言的例子,由简单到复杂-100 provides a hardware programming language VHDL examples, from simple to complex

快速傅立叶变换(FFT)作为时域和频域转换的基本运算，是数字谱分析的必要前提。传统的FFT使用软件或DSP实现，高速处理时实时性较难满足。FPGA是直接由硬件实现的，其内部结构规则简单，通常可以容纳很多相同的运算单元，因此FPGA在作指定运算时，速度会远远高于通用的DSP芯片。FFT运算结构相对比较简单和固定，适于用FPGA进行硬件实现，并且能兼顾速度及灵活性。本文介绍了一种通用的可以在FPGA上实现128点FFT变换的方法。设计复数乘法器为核心设计了FFT算法中的基-2蝶形运算单元，溢出控制单元和地址与逻辑控制模块等其它模块,并以这些模块和FPGA内部的双口RAM为基础组成了基-2FFT算法模块。 

-- Booth Multiplier -- This file contains all the entity-architectures for a complete -- k-bit x k-bit Booth multiplier. -- the design makes use of the new shift operators available in the VHDL-93 std -- this design passes the Synplify synthesis check -- download from: www.fpga.com.cn & www.pld.com.cn--- Booth Multiplier-- This file contains a ll the entity-architectures for a complete-- k- bit x k-bit Booth multiplier.-- the design mak es use of the new shift operators available in th e VHDL-93 std-- this design passes the Synplify synthesis check-- download from : www.fpga.com.cn

使用Altera公司的FPGA进行VHDL开发。使用quartus2 9.0软件在EP1C3T144C8开发板上实现对4x4键盘的输入控制，并显示在一个8段式数码管上。-The use of Altera" s FPGA-VHDL development. Use quartus2 9.0 software EP1C3T144C8 the development board to realize 4x4 keyboard input control, and displayed in an eight-stage digital pipe.

Verilog for SPI Core source code

多倍（次）分频器 请注意: 本例的各个源描述的编译顺序应该是: 52_divider.vhd 52_divider_stim.vhd-Times (times) divider Please note: This case is described in various sources to compile the order should be: 52_divider.vhd 52_divider_stim.vhd

有关于SD卡的音频部分！希望对大家有用！-SD cards have on the audio portion! Hope useful for everyone!

PS2键盘控制程序实验的内容是用EDK建一个简单的系统并加入自定义的外设(一个ps2键盘控制器) 当键盘按下时会有相应的键扫描码输出显示到PC终端 -PS2 keyboard to control the content of the experimental procedure is used EDK build a simple system and add custom peripherals (a ps2 keyboard controller) when the keyboard is pressed the corresponding button will scan code to the PC terminal output shows

设计一个具有同步置1，异步清零的D触发器。 设计一个类似74LS160的计数器(Design an D trigger with synchronous reset 1 and asynchronous reset. Design a counter like 74LS160.)