【摘要】 为了满足超市射频识别读写器系统应用的需求,设计了基于嵌入式实时操作系统FreeRTOS与ISO/IEC14443A标准的非接触式CPU电子纸可视卡读写器系统。采用STM32F107VCT6微控制器和MFRC522射频芯片等进行相关的硬件电路设计,通过移植FreeRTOS内核实现硬件资源管理和任务调度;在此基础上,给出了非接触式CPU电子纸可视卡电子纸显示模块中片内操作系统的设计原理;实现了一个可视电子钱包的应用。实验结果表明,该读写器系统具有读写速度快、准确率高、可靠性强的优势,使用方便快捷。更多还原

【Abstract】 To meet the demands for the application of radio frequency identification reader system in supermarkets,a reader system for a non-contract visual CPU card with an electronic paper(E-paper)is designed based on ISO/IEC 14443Aand embedded open source operating system FreeRTOS.Firstly,the chips STM32F107VCT6and MFRC522are used in the hardware designing.The resource management and task scheduling are implemented by transplanting a FreeRTOS kernel.Then the design principle of the non-contact visual CPU card with the E-paper in COS(chip operating system)is presented.Finally a visual electronic wallet is completed as an experiment.Experimental results show that the reader system is convenient with high speed and accuracy,which is reliable.更多还原