用MSP430汇编写的简单IP协议程序，实现了ARP、Ping、UDP的协议操作，完成串口与以太网的数据转换。

将上位机的数据通过串口发送，打包成UDP包发送给下位机，实现与下位机的通信。-The host computer sends data through the serial port, packaged into a UDP packet and send to the next crew.

下位机向上位机发送UDP包，上位机接收后解包通过串口查看接收的数据。-the next crew sends UDP packets to PC,then PC unpackets after receiving and check data received through serial port.