基于MCS-51的Mifare智能IC卡读卡器软件设计

Software Design of Mifare Smart IC Card Read-write Device Based on MCS-51

Philips公司的Mifare技术是当今非接触式IC智能射频卡的主流技术。Mifare智能IC卡具有高度安全、高可靠性及分区的存储结构特点,支持一卡多用,结合以单片机和读卡模块为核心的系统,可应用于广泛领域。本文主要着眼于读卡器软件系统的开发,介绍了智能IC卡及其读卡器的工作原理,详细分析单片机使用SPI方式与IC卡通讯的原理与时序算法,详细分析针对数据稳定性的数据存储模式和读写算法,并给出主体程序流程及代码。本软件系统主要从通用性的角度进行设计,实现基本的、稳定性高的读写功能,在此基础上针对具体应用添加若干辅助程序,即可满足多种应用需求,具有很好的可移植性。

While Mifare technology of Philips is the prevailing contactless IC card technology, Mifare smart IC card is of high security and reliability, having the characteristic structure of partition and available for muhi-use on single card. The system based on MCU and read-write module can be adopted in broad domains. The paper mainly focuses on the software design in such system, and introduces smart IC card and the principle of its read-write device. Elaborate analysis is demonstrated on the communication between MCU and IC card with SPI mode and temporal arithmetic. Moreover, there are details on the store-mode, with respect to data stability, and the read-write arithmetic, offering the counterpart of flow chart and code. Now that the whole software system is designed in the aspect of general use and accomplishes the basic and stable read-write function, user could add some accessorial program, aiming at the specific application, to achieve most application goal. The software system is of high level ability for transplant.