交通信号灯 Verilog 硬件实现

说明：  用verilog编辑的中值滤波器！语言旁表有注释方便理解！(Using Verilog editor median filter! Language beside the table annotated to facilitate understanding!)

说明：  basic verilog code on siso, piso, sipo

哈希算法FPGA实现代码，采用MD5算法，并给出了仿真波形。(MD5 hashing algorithm for FPGA implementation code)

实现任意整数倍的信号分频，可调，不存在毛刺，波形完整，可运于信号的分析与检测(Arbitrary integer multiple of the signal frequency, adjustable, there is no glitch, waveform integrity, and can transport the analysis and the detection signal)

UMC 90nm design kit. please read before using thee models.

通过随机数产生原理进行verilog编程，从而实现FPGA的随机数产生(Through random number generation principle for Verilog programming, so as to achieve the FPGA random number generation)

利用verilog编码，设计运动员反应测试时间的电路，共有三个输入，枪声、运动员和复位信号，另外，认为反应时间不可能小于200ms，因此当测量时间小于200ms时 会发出警报

说明：  用verilog语言实现计算反正切函数，在软件无线电中解调PM/FM中使用的尤为频繁。上传的压缩包是modelsim工程，基于6.5c,里边包含一个完整的PM波产生以及解调过程的matlab文件仿真，并取其中间的I和Q支路做为verilog文件的输入，并将其借条输出与MATLAB实际解调输出作比较。 鉴相器的设计基于CORDIC算法，其精度取决于迭代的深度。由于工程实际运用只需要解调出atan值，并不需要绝对的值，所以并没有给予加权，需要的同学可以自己加上。(Calculated using verilog language arc tangent function, the software radio demodulation PM/FM is particularly used frequently. From the archive is modelsim project, based on 6.5c, inside the PM contains a complete demodulation process of wave generation and simulation matlab file, and whichever is the middle of the I and Q branch verilog file as input, and its IOU demodulated output and actual output of MATLAB for comparison. Phase detector design is based on CORDIC algorithm, its accuracy depends on the iteration depth. As the practical application of engineering demodulated atan value only and does not need absolute value, and there is no weight given to the need of the students can add their own.)

本文件时VHDL的各种编写规范，有助于开发者在平时养成好的编码习惯(This document, the various write VHDL specification, helps developers to develop good coding habits in peacetime)

FPGA代码，包含地址译码模块、16位锁存器、AD片选、死区及滤除窄脉冲、过流和短路保护、解除脉冲封锁模块、PWM模块、PWM选择 (FPGA code, including the address decoder module 16 latches, AD chip select, filter out the dead and narrow pulse, overcurrent and short circuit protection, lifting the blockade pulse module, PWM module, PWM selection)