RC522完整程序无需修改可放心使用，呵呵呵用完可要说谢谢哈

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.)

基于 Ti 的RFID芯片 RI-R6C-001A的原理图和PCB图-Ti based on the RFID chip RI-R6C-001A schematic and the PCB map

chirp fourier transform 线性调频Z变换(CZT) 的matlab功能函数，该方法通过CZT变换获得精确的等价于离散傅里叶变换结果的间谐波信号的频率分布估计值,可以得到精确的各次谐波和间谐波参数,利用该函数相同采样频率下该方法的检测精度更高。(This routine allows the evaluation of the DFT over an arbitrary range of frequencies as its name implies this lets you zoom into a narrow portion of the spectrum.)

this code for receive SAAB transponder (RFID)

nRF2401快速开发系统相关的文档，是公司内部提供的。-nRF2401 rapid development of system-related documentation is provided by the company.

无线射频识别技术(RFID)是自动识别技术的一种高级形式。随着信息化技术的不断发展，无线射频识别技术(RFID)的应用也越来越广泛。本书主要介绍了无线射频识别技术的基本工作原理和具体应用，并列举了大量的应用实例，如动物识别管理、配送中心管理、矿井管理、停车场管理、军事物流运用等-Radio frequency identification technology (RFID) is the automatic identification of an advanced form of technology. As information technology continues to develop, radio frequency identification technology (RFID) applications are increasingly widespread. This book introduces the radio frequency identification technology, the basic working principles and specific applications, and listed a large number of application examples, such as animal identification management, distribution center management, mine management, car park management, the use of military logistics

说明：  Desfire ev1 t commands + authentication process

RFID 工作频率开发工具包包括READER API-Frequency RFID Development Kit includes READER API

在射频识别RFID芯片设计中用到的miller解码器设计-In radio frequency identification RFID chip design used in miller Decoder Design

RFID 读写 可以任意读写有关电子标签的一种猩猩软件-RFID can read and write arbitrary writable electronic labeling of a gorilla software