摘 要
射频识别(Radiofrequency identification ,RFID),又称电子标签(E-Tag),是一种利用射频信号自动识别目标对象并获取相关信息的技术。随着技术的进步,RFID应用领域日益扩大,现已涉及到人们日常生活的各个方面,并将成为未来信息社会建设的一项基础技术。因此,研究、设计和开发RFID系统具有十分重要的理论意义和实际意义。
论文系统地论述了射频识别系统和读卡器的理论分析,研究了射频识别系统中的许多关键技术,并提出了射频识别读卡器的设计方案。
本文首先分析了射频识别技术的基本原理、研究方向和应用情况。在充分研究了射频卡的基本原理、技术特点、国际相关标准后,进而提出了基于STC11F32单片机的射频读卡器系统设计的方法。设计采用MFRC522射频读写模块在STC11F32单片机的控制下实现对Mifare卡的读写访问操作。
硬件部分设计主要包括单片机控制电路设计,射频模块设计,天线电路设计,串行通信电路设计,声音提示及显示电路设计等,其中详细讨论了读卡器的软件设计方法。软件设计包括单片机处理程序,射频基站芯片RC522的基本操作、Mifare卡操作程序设计、声音提示及显示部分程序等。论文中系统地讨论了软件实现读卡器与Mifare卡之间通信所要求的请求应答、防冲撞、选卡片、认证、读写等功能模块的实现原理。
关键词:射频识别,读卡器,IC卡,STC11F32,MFRC522
Abstract
Radio frequency identification (radio frequency identification, RFID), also known as electronic tags (e-Tag), is an RF signal automatic target recognition and access to relevant information technology. With the advances in technology, RFID applications widening, has been involved in all aspects of people's daily lives, and will become a basic technology of the future information society. Therefore, research, design and development of RFID systems has important theoretical and practical significance.
Discusses the theoretical analysis of radio frequency identification system and card reader to the paper system, many of the key technology of radio frequency identification system, and the design of radio frequency identification reader.
This paper firstly analyzes the basic principle of radio frequency identification technology, the research direction and application. In the full study of RF Card basic principle, technical characteristics, relevant international standards, and then put forward based on STC11F32 single chip RF card reader system design method. The design adopts MFRC522radio frequency read write module in STC11F32under the control of a single-chip microcomputer to realize Mifare card read and write access operations.
The hardware part of the design including the MCU control circuit design, design of the RF module, Antenna circuit design, circuit design of the serial communication, voice prompts and display circuit design, including detailed discussion of the reader software design methods. Software design, including the microcontroller handler, the basic operation of the RF base station chip RC522, Mifare card operating procedures, voice prompts and display part of the program. The paper discussed the request response communication between the software implementation of the reader with Mifare card required, anti-collision, election card, certification, read and write function module principle.
Key words:RFID, reader, IC card, STC11F32, MFRC522
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原创性声明
本人郑重承诺:所呈交的毕业设计(论文),是我个人在指导教师的指导下进行的研究工作及取得的成果。尽我所知,除文中特别加以标注和致谢的地方外,不包含其他人或组织已经发表或公布过的研究成果,也不包含我为获得 及其它教育机构的学位或学历而使用过的材料。对本研究提供过帮助和做出过贡献的个人或集体,均已在文中作了明确的说明并表示了谢意。
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基于单片机的RFID读写器设计毕业设计



