CAN驱动 基于sja1000芯片，自己写的，还提供makefile文件与各种有关系的模块，与网上流传的大不一样，相当于网卡的功能，接收网络信息-CAN drive based sja1000 chip, with the spread of the Internet, a big difference, is equivalent to the function of the network card and receiving network information