利用数字电路知识，进行二十四小时计时，并有闹钟与蜂鸣器功能...

crc循环冗余校验码，用于对传输信号进行编码校验，是信息更可靠-crc cyclic redundancy check code used to transmit coded signals to verify, the information is more reliable

十进制计算机，实现十进制计数功能，简单可靠(vhdl)

/功 能：1.实现与CPLD的通信,从而控制PWM的占空比. 2.实现LCD显示相关信息. // 3.实现对键盘按键的判断和确定相应的操作. 4.实现对电压电流的检测. // 5.实现过载保护功能,电流过大时,切断PWM输出,当排除过流故障后,自动恢复供电 // 6.实现用PID算法跟踪电压,实现稳压输出(/ Function: 1. Achieve communication with the CPLD to control the PWM duty cycle. 2 LCD Display relevant information.// 3. Realize the keyboard keys judgment and determine the appropriate action. 4. Achieve the voltage and current Detection// 5. achieve overload protection, current is too large, cut off the PWM output, when excluding overcurrent fault, automatically restore power// 6. achieve tracking voltage with PID algorithm to achieve the regulated output)

说明：  通过一个计数器来实现输出信号的占空比要求，可以将duty_cycle分配到拨码开关上,LED分配到发光二极管上,然后调节拨码开关,即可看到LED的亮度发生变化.(The duty cycle of the output signal can be assigned to the dial switch by a counter, and the LED can be assigned to the light emitting diode. Then the brightness of the LED can be seen by adjusting the dial switch.)

实现verilog读写txt文件，从sut.txt从读取数据，进行操作后，写入out.txt(Realize verilog read and write txt file)

说明：  利用FPGA实现TMDS接口标准，可用于DVI以及HDMI接口的FPGA实现（含文档）(Video Connectivity Using TMDS I/O in Spartan-3A FPGAs)

基于cordic算法的DDS的Verilog代码。经过仿真验证，绝对可靠。(Based on cordic algorithm DDS Verilog code. Through the simulation, is absolutely reliable.)

这个是vhdl的彩灯实例程序，里面涵盖了48种的彩灯变化，通过了maxplus的验证，并且在机上实验通过-this is the Lantern example VHDL procedures inside covers 48 species of Carnival changes adopted maxplus certification, and the plane through experiments

递增方式在4位数码管上向上计数显示从0000-0001->0002……..9999….0000….0001…. -- 利用CPLD设计了一个4位十进制计数器，并用数码管显示当前计数值-Incremental approach in the four counts upward digital tube display from 0000-0001-

USB设备接口的驱动程序，采用verilogHDL语言编写，并包含相关说明资料(USB device driver interface, using verilogHDL language, and contains descriptive information)