Design Of Virtual RFID Reader Communication Detection System Based On FPGA

Radio Frequency Identification(RFID) is a new rising automatic identification technology. It has many promising features such as large information capacity, long effective distance and multiple tags operation and is widely used in access control, logistics and other management area.Virtual Instrument (VI) is the combination of modern computer and instrument technology. By fully utilizing the computing, storage, display and file management capacity of modern computer and realizing the original professional function and deck control of traditional instruments with software, VI turns modern computer system into a full functional instrument system with abundant software and hardware resources.The Wiegand and ABA protocol are two major communication interface format used to link the RFID reader to host PC or controller. This paper researches a testing system to verify the integrity, validity and timing conformity of Wiegand and ABA communication. The testing system completes the major characteristics parameters measure of the two protocol such as pulse width, pulse interval etc. It comprises FPGA and host software two major parts. FPGA part carries out the signal sampling, FIFO buffer and storage. Host software completes digital processing of sampled signal and displaying of the waveform. FPGA part is designed with Verilog hardware description language under Altera's Max+plus II environment. Host software is developed with National Instruments' graphic program toolkit Labview.