R & D Based On The The Pn512 Chip Generic Read And Write System

The radio frequency identifies is technique that calls RFID technique. In the last few years,the technique developed front science and technology item. It is a kind of newly automatic identifying technique with antenna,and don't get in touch with a way. It have many advantages,such as quickly communication speed,farly distance operating,low cost,small size and being free from bad weather to influence.It can apply to many systems,no man superhighway charge system,thing-to-ting network realm,etc. All countries go deep into it with systemly and thoroghly research,and have already obtained a quite good achievement.First, this text introduced the main work of the present condition on RFID technique realm,and introduced RFID technique standard,and related the thesis research work. Secondly,the text carried on a brief introduction to RFID system constituting,the coding in the basic work principle,encrypt and modulation in system code, and took ISO14443 standardses as an example to carry on elucidation. Then carried on a brief introduction to the category of ARM processor and chip, here we chose ARM7 processors and PN512 chipses according to designing what to need.Finally what to carry on is hardware design,including the design of reader card , label , antenna , and software design , including the comprehensive usage withμC/OS-II operating system application, C language function in database system,editing collected materials, and the research of the colliding calculate way, the end purpose is to develop a style of higher Classly and expanding functionly reading card terminal equipments with supportting IS014443 standard, applicable to different situation and carrying out different function.