本例是一个6层电梯的控制系统,VHDL原程序,状态机,控制器

A 4 bit twisted ring counter is a sequential circuit which produces the following sequence of output values: 0000, 1000, 1100, 1110, 1111, 0111, 0011, 0001 and then repeats. Design a circuit for a 4 bit twisted ring counter that uses four D flip flops. Draw a state transition diagram, a state table and a schematic for your circuit. Design an alternate implementation using just three flip flops and draw a state transition diagram, state table and a schematic for your circuit. If your designs are extended to implement an n bit twisted ring counter, how many flip flops are required using each of the two approaches. In what situations would you prefer the first method? In what situations would you prefer the second?

说明：  fPGA中的竞争冒险现象的来源及其解决方法(FPGA in the source of the phenomenon of competitive risk-taking and their solutions)

基于MAX2运用Quartus实现串口通信-MAX2-based use of Quartus Serial Communication

tPad DE2-115/70开发板可用的摄像头采集、显示程序，QT10.0以上环境可用，原装代码，可以进行修改加以使用，如使用到倒车影像系统中，视频显示等。(tPad DE2-115/70 development board available cameras capture, display program, QT10.0 over the environment is available, the original code can be modified to be used, such as the use of the reversing video system, the video display.)

de2 70 开发板的演示程序，verilog语言编写，视频输入输出(de2 70 development board demo program, verilog language written, video input and output)

< 跨度 style="font-size:12.0pt;line-height:115%;font-family：""> Cryptographyis 的科学写作的秘密代码，是一种古老的艺术 ；密码学在写作的作坊使用追溯到大约 1900年公元前 anEgyptian 抄写员非标象形文字用于题字。一些密码学写作与应用程序从外交公函到战时军用飞机的发明之后的某个时候, 出现自发的 expertsargue。然后，新形式的加密技术来不久的计算机通信的广泛发展，实在不足为奇。数据及通信加密是必要时在 anyuntrusted 的介质，包括几乎任何网络，特别是因特网通信

在接收信号的数字化、软化的实现中,数字下变频起着重要的作用。本文首先介绍了数字下 变频的组成结构,然后详细分析了数字下变频的工作原理,描述了在实现数字下变频时,设计方案所 采用的高效滤波器———CIC 滤波器和多相抽取滤波器的结构和原理。最后,用通过Simulink 对数字 下变频的性能进行了仿真。在仿真的基础上使用Insight 公司的FPGA 开发系统,用测试电路实测了 数字下变频的性(In the receiving digital signal, softening the realization, the digital down-conversion plays an important role. This article first introduced the digital down conversion of the composition, and then a detailed analysis of digital down conversion of the working principle described in the realization of digital down conversion, the design used in high-performance filters--- CIC filters and multi-phase extraction filter structure and principle. Finally, with the adoption of Simulink for digital down-conversion performance of the simulation. In the simulation based on the use of Insight s FPGA development system is measured using the test circuit of the digital down-conversion of)

verilog 写的 电话计费器程序-verilog to write a telephone billing program

ip core of the transceiver gtx

一个使用VHDL设计的具有强大功能的32位CPU，这个文件包含了与之配套的PCI位码文件及配置程序。-A VHDL design with the use of powerful 32-bit CPU, this document contains a complete set of the PCI code files and configuration procedures.