说明：  这是一个用单片机控制网卡传输的程序,集成了TCP/IP协议,使用硬件为89C51+RTL8019,另外传输另一端是计算机串口,可以方便的实现数据验证
(This is a card with SCM transmission control procedures, integration of the TCP/IP protocol. the use of hardware for 89 C51 RTL8019, and the other end is transmitting computer serial port. can facilitate the realization of data validation)