RFID

RS232的UART编程，包括波特率发生器模块，串口接受模块，串口发送模块(RS232 programming the UART, including the baud rate generator module, serial module to receive, send serial module)

fpga平台实现srio通信，以及srio端口寄存器设计。(FPGA platform to achieve sRIO communication, as well as sRIO port register design.)

Farrow 滤波器设计经典文章，作者是：FM.Gardner，farrow滤波器设计的始祖，经典值得推荐！（两篇文章）(Farrow filter design classic article, the author is: FM.Gardner, farrow filter design ancestor, classic worth recommending! (Two articles))

UHF读写器读写器简介 本产品具有多协议兼容、体积小、读取速率快、多标签识读、圆极化天线对标签没有方向限制、防水型外观设计等优点，可广泛的应用于各种RFID系统中，典型的应用场合有：  (UHF reader reader Introduction The product is compatible with multi-protocol, small volume, read rate, and multi-tag read, circularly polarized antenna on the label does not limit the direction, waterproof design, etc., can be widely used in a variety of RFID systems, typical applications are:  )

说明：  为了系统的安全性，为门禁控制系统增加了登录功能，通过从后端数据库录入管理员信息，包括用户名与密码，便可在用户界面使用数据库中的信息进行登录，极大的保证了系统的安全性。用户可以通过数据库匹配方法来对ID卡进行登记、删除等操作。(In order to ensure the security of the system, the login function is added to the access control system. By inputting administrator information from the back-end database, including user name and password, the information in the database can be logged on in the user interface, which greatly guarantees the security of the system. Users can register and delete ID cards through database matching method.)

说明：  适应多个模式的rs编码，Verilog，选择对应的多项式(RS coding adapted to multiple modes.)

实现verilog16位乘法器，verilog新手(achieve 16-bit multiplier)

说明：  ID卡读写卡器程序，支持ID门卡卡号的读取和写入(ID Card reader writer)

GPS信号结构,C/A码产生方式及其测距码研究(GPS signal structure and ranging code research)

soft for RC522+ST8 UART