a vhdl_program used for flat detect

程序主要是用硬件描述语言（VHDL）实现： 4*4键盘扫描，简洁明了，通俗易懂，比较适合VHDL初学者-procedure was used in hardware description language (VHDL) to achieve : 4* 4 keyboard scan, concise, easily understood and more suitable for beginners VHDL

按键控制数码管显示，从0到9显示，八位数码管(Button control digital tube display)

vhdl编写的硬件乘法器-prepared by the VHDL hardware multiplier

RS 编码和解码Verilog Code, 实现了RS（544,514)的编码和译码；(-RS Coding and Decoding Verilog code，　implement RS（544,514))

This project features a full-hardware sound compressor using the well known algorithm: IMA ADPCM. The core acts as a slave WISHBONE device. The output is perfectly compatible with any sound player with the IMA ADPCM codec (included by default in every Windows). Includes a testbench that takes an uncompressed PCM 16 bits Mono WAV file and outputs an IMA ADPCM compressed WAV file. Compression ratio is fixed for IMA-ADPCM, being 4:1. PLEASE NOTICE THAT THIS CORE IS LICENSED UNDER http://creativecommons.org/licenses/by-nc-sa/3.0/ (Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported). That means you may use it only for NON-COMMERCIAL purposes.

有关视频压缩的IPCore，希望对大家有用-Video Compression IPCore

FPGA测试程序，仅供测试硬件是否能够运行，主要功能是点亮运行指示灯(The main function of the test program of FPGA is to light the running indicator.)

基于FPGA的AD和DA设计代码及文档(Design code and document of AD and DA based on FPGA)

实现PWM波型....使用VHDL语言-Realization of PWM waveform using the VHDL language ....