食堂售饭系统窗口机设计

POS Machine Design of Eatery Charging System

叙述了传统食堂售饭系统的不足 ,介绍了CAN总线与非接触式IC卡技术的特点和优势 ,并对以这两种技术为基础的新型食堂售饭系统窗口机的软硬件设计原理进行了较详细的分析。窗口机硬件系统主要由CAN总线通信接口、IC卡读写器、键盘、显示和存储器等功能模块组成 ,软件系统主要由窗口机初始化模块、窗口机监控模块、窗口机按键处理模块等组成。论文在对窗口机原理进行分析的同时 ,也对设计中遇到的关键问题进行了讨论 。

This paper introduces the drawbacks of traditional eatery charging system and advantages of technology of CAN bus and RFID, and analyses the hardware and software design method of POS machine based on technology of CAN bus and RFID card in eatery charging system in detail. The hardware of POS machine is composed of communication interface circuit of CAN bus, IC card read/write device, keyboard circuit, display circuit and memory. The software of POS machine is composed of POS machine initialization, Pos machine monitor, process of POS machine keyboard. At the same time, the key problems in design are discussed.