超市收费系统添加了条形码检测，结合实际应用，模拟设计一微机应用系统，要求该系统综合应用并行接口、串行接口，定时器接口、模拟接口等等（根据具体体题目确定具体接口），实现主控中心微机与

下位机实现远距离传送，以及远程控制、监测功能。包含程序设计流程图，完整代码，运行调试结果

-Supermarket bar code added to detect charging system, combined with practical application, the design of a computer simulation applications require integrated application of the system parallel port, serial interface, timer interface, analog interface, etc. (subject to specific body to determine the specific interface) to achieve microcomputer control center with the lower machine to achieve long-distance transmission, and remote control and monitoring functions. Program flow chart that contains a complete code, run the debug results