CODE_VHDL_COUNTING 电路时钟运动显示期间 LED 7 （MẠCH ĐẾM ĐỒNG HỒ THỂ 邵族 HIỂN THỊ 领导 7 ĐOẠN）

一个8位的CPU设计，用verilog语言写的，希望有用(A CPU OF 8 BITS )

应用背景数字码分多址CDMA。在允许多用户同时发送和接收使用单通道。发射机和接收机同步合成进行使用VHDL工具显示在系统和整体的速度增加；对CDMA系统的功率消耗将减少误差不应介绍系统。关键技术该组件在接收端实现了探测器单元。该组件是由7位比较器和7位串行输入并行输出寄存器（知识产权局）。比较器工作在除以七钟和国家知识产权局工作在主时钟速率。框图或接收器组成如图所示。这是一个特殊的组成部分包括两个时钟周期，然后声称其输出端口的高。组件在输出部分提供必要的同步。然后在接收的PN序列和数据是不同的输入比特S0，S1，S2将相互匹配和同步发射机与接收机之间在CDMA系统。

QPSK调制的载波频偏估计，是一个可以调用的函数。接收端进行了一系列的处理。经典的Kay法(QPSK-carrier frequence offset estimation_ kay )

Verilog-RISC CPU

VHDL,简易音频数字相位表的设计与实现 数字相位测量仪在工业领域中经常用到的一般测量工具，主要应用与同频率正弦信号间的相位差的测量显示。 本系统采用FPGA实现测量的核心部分，主要由数字鉴相、累加计数器、控制器以及寄存与显示译码电路组成。该系统硬件电路简单，整个系统采用硬件描述语言VHDL作为系统内部硬件结构的描述手段，在XILINX公司的ISE9.1的软件支持下完成。可以对20Hz~20kHz频率范围内的音频信号进行采样鉴相处理，并将数据传回FPGA进行相位差计数累加、测量运算，最后送显示译码电路显示，测相范围为 ，相位测量误差 < 。 经测试结果验证，本系统充分利用FPGA对数据的高速处理能力，是系统设计高效、可靠，处理速度快，稳定性高，易于实现。 (VHDL, simple audio digital phase Table Design and Implementation of the digital phase meter general measurement tools are often used in the industrial field, the measurement of the phase difference between the main application with the same frequency sinusoidal signal. The system uses the FPGA implementation of the core part of the measurement, mainly by the digital phase, cumulative counter, the decoding circuit of the controller as well as storage and display. The system hardware circuit is simple, and the entire system using hardware description language VHDL system means a description of the internal hardware structure, completed in the XILINX company ISE9.1 software support. The audio signal in the frequency range of 20Hz ~ 20kHz sampling KAM-phase process, and the data returned FPGA retardation counted accumulation measuring operation, and finally sent to the decoding circuit, the scope of the measurement phase, the phase measurement error < . The test results verify the full u)

实现4种常见波形正弦、三角、锯齿、方波（A、B）的频率、幅度可控输出（方波 A的占空比也是可控的），可以存储任意波形特征数据并能重现该波形，还可完成 各种波形的线形叠加输出。 -Realize four kinds of common sine wave, triangle, sawtooth, square wave (A, B) the frequency, magnitude controllable output (square wave A, is also a controllable duty cycle), can store arbitrary waveform feature data and can reproduce the waveform, but also completed a variety of linear superposition of the output waveform.

FPGA MIPS架构CPU，五段流水线功能，ISE开发，verilog语言，可综合，模拟结果正确，内含设计报告(FPGA MIPS CPU, simple five-stage pipeline function, developed by ISE, using verilog language)

vhdl的3-8译码器-instantiate the 3-8 decoder

Xilinx fpga 设计培训中文教程,比较好的学习FPGA入门的教程(Xilinx fpga design training for Chinese curricula, better start learning FPGA Tutorial)

用CPLD驱动数码管，实现从0000计到9999，数码管是用动态显示，程序用VERILOG完成的-CPLD drives with digital control, of from 0000 to 9999, digital control is a dynamic display, the program completed with VERILOG