说明：  也许你在网上找个半天也找不到详细介绍CAN 协议的文档,不要找了,我这个就是很详细介绍CAN 协议的文档,协议明白了,再在各个平台调试程序就方便多了.
(Maybe you can not find on the Internet to find a half-day details of CAN protocol document, not to find, I introduced the CAN protocol is a very detailed document, the agreement to understand, and then in various Platform Debugger program more convenient.)