The Design And Implement Of IC Reader Based On AT89C52

RF Reader is one of the key components of radio frequency identification system (Radio Frequency Identification System, hereinafter referred to as RFIDS). Based on the research on related theories and technology of RFID system, this article develops a RF reader based on CAN-bus, making use of AT89C52's controlling and communication functions on RI-R6C-001A.The work is finished involving in the application of radio frequency identification technology, MCU and its interface technology, Field bus technology and serial communication technologies.Through the analysis for functional testing of various kinds of MCU,CMOS chip, and Field bus, main controller of the reader designed adopts the AT89C52 microcontroller which is compatible with the MCS-51 pins and instructions. COMS chip adopts the multi-agreement receive controller RI-R6C-001A, which is newly developed by TI company for IC card. It provides the digital interfaces to the users, which is very convenient to use. Field Bus is chosen as CAN-bus which is of worldwide fame, and multi-modes for master works. With its outstanding reliability, real-time and flexibility, output function cannot effect the work of the whole system when error joints can be closed automatically. In the H-C interaction interface, there are 128*32 dot-matrix LCD and 4×4 matrix keyboard input module designed for the reader. These modules can improve the speed of system and maneuverability. To achieve the communication between PC and the reader, design CAN/RS-232 converter module for protocol conversion. The article comprises several steps: divide hardware circuit into several parts firstly, write and debug software programs one by one, connect the hardware circuit into a whole, and debug for system, and finally improve the functions of the reader.With the technology about integration CAN-bus and RFID, system can achieve the operation to multi-channel operation at the same time. It has some characteristic such as stable performance, low power consumption, strong anti-interference ability and so forth. Based on this reader, different RFID application systems could be developed with certain modification, which has some practical value for the promotion of RFID.