PWM for control of motors

时间同步后即可确定每帧数据的起始位置，这样就能完整的截取下每一帧。但是，数据中还带有频偏信息。在常规的通信系统中，多普勒很小仅仅会带来很小的频偏，但是在大多普勒的情况下，频偏将非常大，20马赫的速度将会带来将近34K的频偏。因此，如何很好的纠正频偏即为本系统的难点。 OFDM中，我们将大于子载波间隔倍数的频偏称为整数倍频偏，而将小于一个子载波间隔的频偏称为小数倍频偏。频偏矫正精度只要能保证小于十分之一倍的子载波间隔，频偏就不会对均衡和解调造成影响。本文中我们借鉴这种思想，由于硬件资源限制，我们将在接收端做64点FFT，即相当于将频域划分为64份，我们将小于 的频偏称为小数倍频偏，将 整数倍的频偏称为整数倍频偏。本程序即基于SCHIMDL经典方法完成小数倍频偏纠正(After time synchronization can determine the starting position of each frame data, so you can complete the interception of each frame. However, in the data with frequency information. In conventional communication systems, doppler small will bring only small deviation, but in the case of most of the doppler, frequency PianJiang is very large, 20 Mach speed will lead to deviation of nearly 34 k. Therefore, how to good to correct deviation is the difficulty of this system. OFDM, we will be bigger than the sub-carrier spacing ratio of frequency deviation is called the integer frequency offset, and the interval will be less than a child carrier frequency offset is called decimal frequency doubling. Deviation is less than one over ten times as long as can guarantee accuracy of sub-carrier spacing, deviation will not affect balance and demodulation. This article, we draw lessons from the idea, due to the limited hardware resources, we will do 64 points FFT at the receiving end, which is equ)

Quatus下用Verilog语言编写的双向交通灯控制系统，内含程序及波形图，注释详细，课程设计(Verilog language Quatus two-way traffic light control system, containing program and waveforms, detailed annotations, curriculum design)

说明：  是用VHDL语言编写的乐曲演奏程序，详细的写了各个模块的子程序(VHDL language is the music playing program)

设计一个简单的FIR滤波器，并按要求确定滤波器的系统函数。(Design a simple FIR filter, and determine the filter according to the requirement of system function.)

I2C MASTER DESIGNED by Verilog

Matlab to hdl code for Least_square testbench

说明：  计算机组成原理实验多时钟周期CPU设计，包含VHDL代码的设计，实验电路图，实验详细截图。(Computer component experiments designed more CPU clock cycles, including VHDL code design, test circuit, test detailed screenshots.)

自己编写的C++的类的测试程序，有详细的注注释，对初学者有很大帮助！！！(The own written C++ class test program, detailed annotation of Note of great help for beginners! ! !)

与IP核配套的I2C-Master Core，包含了目前主流FPGA芯片的I2C实现，代码包括Altera/Xilinx/OpenCore等公司的VHDL/Verilog/C等。(I2C-Master Core)

Verilog HDL数字系统设计项目，频率可调的任意波形发生器，可以输出正弦波、方波、三角波和反三角四种波形(Verilog HDL digital system design projects, adjustable frequency arbitrary waveform generator can output sine wave, square wave, triangle wave and the anti-triangular four waveform)