| Radio frequency identification technology referred to as RFID. This technology combines with wireless and identifies technology, use of radio frequency signal to transmit information and identifying target information. Over recent years, with the progress and development of RFID technology, the advantages of convenient and low-cost appear gradually. The field of application of this technology also extends to all aspects of people’s lives, and reflects the high practical value.In the RFID system, processor and RF chip constitutes the core of the whole system, and plays an important role in data communication. At present, the design of this part has low flexibility. This is the bottleneck of the development and application of technology. Therefore, design a reader with high flexibility will promote the development and application of this technology.This paper first introduced the basic structure, working principle and related standards of RF system. Combined with the current development status and Analysis of the current common deficiency of the system, this paper proposed a system design scheme based on SOPC technology.Secondly, introduce the advantage of SOPC technology. The hardware and software of the system are introduced in detail respectively. The hardware design mainly includes:Introduced the design of Nios II processor, UART, PIO, LCD module, SDRAM control module and so on. At the same time, the hardware circuit of RF module is also introduced. In the part of software mainly includes the control program of peripherals and interfaces of Nios II system, elaborated register operations of RF chip and interrupt processing program. According to the characteristics of the different modules, we use two different control methods, and various control functions of independent packaging, thereby greatly improving the procedures portability.Finally, Test the design of hardware and software part to verify the validity and feasibility of the system function. |
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