基于fpga的vga输出灰阶测试图片

学习verilog过程中总结的54个经典设计实例，供verilog初学者入门学习，掌握编程技巧。实例包括：计数器、加法器、数据寄存器、锁存器、进程函数，以及小型工程项目如交通信号灯系统，乐曲演奏，简单编码器等设计实例。

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)

说明：  ZYNQ中 PS 端 CAN接口的基本使用方法，并通过 CAN接口实现与 PC 端 CA N调试软件之间的数据接收和发送(The basic use method of PS end can interface in zynq, and the data receiving and sending with PC end can debugging software through can interface)

LTE上行链路使用的DFT-S-OFDM系统的仿真，其中包括QPSK星座映射、串并转换、N点DFT、子载波映射等。(LTE uplink using the DFT-S-OFDM system simulation, including QPSK constellation mapping, string and conversion, N-point DFT, subcarrier mapping, etc..)

利用ISE本身的IP核，实现GMII的网络传输，在ML605开发板上调试过，可以跑，有兴趣的可以看看，相互学习嘛

数字钟vhdl实现，在线测试无误，具有闹钟，对表功能(Digital clock vhdl implementation, online testing is correct, with alarm, the table function)

zedboard原理图详细，PCB板焊接方便，每个接口表明清楚。(Zedboard schematic in detail, PCB board welding is convenient, each interface that clearly.)

Quartus环境下的7段扫描显示电路的源程序(Quartus environment of the seven scanning display circuit of the source)

此代码粗略才描述了怎么用红外线控制电机的转动，包括前传，中止，后转，加速等等。此代码并非本人原创，只是经过本人修改，更人性化而已，当然并不完美，多有瑕疵。只是望其能帮助初学者更好的学习、理解，以尽绵薄之力。

采用vhdl代码描述自适应滤波器，具有很好的可参考性，和实用性(Vhdl code to describe the use of adaptive filter, can be found with a good nature and usefulness of)