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DDS基本原理，详细讲述了DDS基本原理及设计技巧(DDS Basic principle)

2011年 电赛 E题 简易数字信号传输性能分析仪FPGA信号发生部分 包括m序列，伪随机序列，曼彻斯特编码 程序 和单片机部分程序(2011 CEC E title simple digital signal transmission performance analyzer FPGA signal part of the program and single-chip part of the program)

super fast debounce button on vhdl, xilinx xc

该程序是在d，t，jk触发器上用vhdl语言编写的

基于FPGA设计的电子密码锁是一个小型的数字系统，与普通机械锁相比，具有许多独特的优点：保密性好，防盗性强，可以不用钥匙，记住密码即可开锁等。(FPGA-based design of the electronic code lock is a small digital system. It has many unique advantages：good privacy and security , it do not need the key but remember password to unlock, and so on while it compare to ordinary mechanical locks.)

说明：  iic总线挂接在amba的apb总线上，标准接口，verilog代码的实现(iic bus attached to the amba' s apb bus, standard interfaces, verilog code implementation)

wallace tree multiplier in verrilog

二进制转十进制BCD码 Verilog语言 quartusII(Binary to decimal BCD code Verilog language quartusII)

说明：  CPU设计，包含基本的指令集，能执行简单的程序。考虑了CPU，寄存器，存储器和指令集之间的关系。即读写寄存器，读写存储器和执行指令。(CPU design, including basic instruction set, to execute a simple program. Consider the CPU, registers, memory, and the relationship between instruction sets. That read and write registers, read and write memory and execution.)

第7章数字系统设计实例 7.1 半整数分频器的设计 7.2 音乐发生器 7.3 2FSK/2PSK信号产生器 7.4 实用多功能电子表 7.5 交通灯控制器 7.6 数字频率计-Chapter 7 Digital System Design Example 7.1-integer dividers designed Music Generator 7.2 7.3 2F SK/2PSK Signal Generator 7.4 Table practical multi-function electronic traffic signal controllers 7.5 7.6 Digital Cymometer