This paper analyzed topology and messageframe types of CAN bus and compared the standard frame format and extended frame format.
分析了CAN总线标准的网络拓扑结构、报文帧格式，并对标准帧和扩展帧进行了比较。
2
By designing the form and meaning of CAN messageframe, the functions of data collection, analysis, storage and receiving commands to control the lower was achieved.
通过设计CAN报文帧的格式及含义，实现了数据采集、解析、存储及接收命令控制下层的功能。
3
Specific to the of dashboard node application, we designed intact structure of SAE J1939 communication messageframe and the realize function code based on CDC3207G.