Design and Implementation of Multifunction UHF RFID Reader Based on MQX Real Time Operating System

Abstract We report on the development of UHF RIFD(Ultra High Frequency Radio Frequency Identification)reader based on MQX Real Time Operating System(RTOS) aimed at providing more communication interfaces and redevelopment platform. The developed RFID reader integrates a commercial off the shelf inductive coupling RF transceiver in 922 MHz band, fully compliant with ISO18000 standard, MCF52259 microprocessor, serving as bottom control unit. On the developed platform, we adopt Freescale MQX RTOS as integrated development environment. MQX Software Solutions offer a straightforward API with a modular architecture, making it simple to fine tune custom applications and scalable to fit most requirements. The system architecture and the communication protocols are chosen to operate with the minimum requirements possible from RFID tag. By moving most of system functionality to RFID reader side, the circuit requirements of RFID tag circuits are relaxed. Furthermore, the developed platform provides several common communication interfaces. Experimental results show the designed multifunction reader has a comparable performance with other commercial readers, but more communication interfaces and providing a redevelopment environment.