de2_clock on altera de2 board

Verilog 黄金参考指南是 Verilog 硬件描述语言及其语法 语义 合并以及将它应用到硬件设计的一个简明的快速参考指南。(Verilog Golden Reference Guide is a concise and fast reference guide for Verilog Hardware Description Language and its syntax and semantics merging and its application to hardware design.)

说明：  DOCUMENT ON DISTRIBUTED ARITHMATIC

说明：  formality2016 userguide

4*4按键扫描电路，用数码管显示0~F，基于VHDL语言设计，包括按键扫描，数码管扫描，数码管显示，按键消抖等代码

运用vhdl程序设计语言进行ppm设计，ppm 设计在vhdl语言中非常常用，运用已经越来越广泛。-use vhdl program design language ppm design, vhdl ppm design in a very common language, has become increasingly widespread use.

verilog 写的 “梁祝”乐曲演奏电路-verilog wrote " The Butterfly Lovers" music concert circuit

用Verilog语言实现的FPGA UART独立收发模块 思路简单，代码简洁。在Lattice LFE3EA VERSA开发板上验证通过,编译器Lattice Diamond. 功能：串口收到数据后立即回传，此后每一秒串口数据+1再发送。(Using Verilog language independent of FPGA UART transceiver idea is simple, concise code. Development board in Lattice LFE3EA VERSA verified by the compiler Lattice Diamond. Features: Serial data is received immediately after the return, then every second serial port and then send the data+ 1.)

FPGA板上的锁存器PLL控制代码（verilog代码）(FPGA board latch the PLL control code (Verilog code))

用walsh算法实现的符号数乘法器,asic流片时,可以不用公司的付费乘法器的ip core.(algorithm using the symbols multiplier, HDL-piece quantities. it is not necessary for the company's paid Multiplier ip core.)

SPI Verilog code with programmable clock