physical node layer 物理层节点
The whole structure of the system was also introduced and the design method of node composing of physical layer and MAC layer protocol were given.
文章还介绍了系统的整体结构，针对系统的物理层节点构成、MAC层协议给出了具体的设计方法。
Through using 16-bit freescale MCU embedded CAN controller as master chip in each node, it achieved the design of hardware circuit, so realized CAN physical layer and CAN data link layer.
各个节点设计上采用内置CAN模块的飞思卡尔16位单片机作为主控芯片来搭建硬件电路，以实现CAN总线的物理层和数据链路层。
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