说明：  基于at89s52的读mifare1卡c51源程序.单片机与rfid读卡模块yhy502相连。单片机与上位机通过串口进行通信，通信速率为19200bps。在PC端通过串口调试软件可以方便地对yhy502模块进行操作，完成读13.56mhz射频的功能。
(AT89S52 based on the C51 card mifare1 read the source code. Singlechip with rfid reader module yhy502 connected. MCU and host computer through serial communication, communication rate of 19200bps. In the PC-side debugging software through the serial port can easily operate on yhy502 module, read 13.56mhz achieve RF functions.)