HD 6P RFID 发卡器、考勤卡钟 RS232 通讯接口程序 Delphi 源码 -HD 6P RFID card issuers, and attendance card RS232 communication interface clock source Delphi program

windows系统，c++语言的 通过RS232 （串口）操作RFID读写卡器的源代码(The windows system, the c++ language uses the RS232 (serial port) to operate the source code for the RFID read and write card)