主要是实现超市管理系统中条形码的串口编程，数据管理方在略为简单-The realization of the main supermarket bar code management system serial programming, data management in a slightly simpler

本程序实现了超市收银台利用钱箱存储现金，通过向串口发送“Chr＄(27)；Chr＄(112)；Chr＄(0)；Chr＄(5)；Chr＄(225)”打开钱箱。-This program, the supermarket checkout counter cash box store cash, to the serial port to send Chr $ (27) Chr $ (112) Chr $ (0) Chr $ (5) Chr $ (225) to open the money