The Study And Design Of Embedded RFID System

The rapid development of modern information technology makes the information that Radio Frequency Identifaction(RFID)that should process increase quickly.It is necessory to design a new RFID reader which can automatically receive and manag the information.At present, in the most field of RFID application,C51 series microprocessor is the main processor.The processors of C51 have characters of simple design,practicality and low price.As the rapid development of semiconductor, ARM,MIPS,PowerPC processors provide a new choice for RFID.This paper introduced the principle and structure of RFID system. Some interrelated communication protocol of RFID and the development of embedded system were expatiated.In the hardware aspect,the embedded RFID system based on LPC2131 processor and ZLG500 module was designed,which included antenna,reader,ethernet interface, MCU etc.In the software aspect,C and compile language were used to realize bootloader,μC/OS-â…¡operating system was transplanted into LPC2131 processor.The software of embedded RFID system was debugged under ADS1.2,the reader function of reading and writing was accomplished.The multi cards identifation and anti-collision algorithm were studied.An improved anti-collision algorithm model for AHOHA algorithm was prenented,the simulation research was done in matlab 6.5. The simulation results showed that the new algorithm was better on efficiency and time.To realize the communication between application software and hardware system,a serial port middleware of embedded RFID system was made by Visual c⁺⁺6.0.Ethernet interface of LPC2131 processor was designed by RTL80189AS to realize LAN communication of reader.