在CAN总线节点中,采用AT89C52、独立控制器SJA1000、高速光耦合器6N137和CAN总线收发器82C250设计了硬件电路,并进行了CAN总线智能节点的软件设计。CAN通信接口接收到上位机的数据后,便向总线上的各个节点传播。实验结果表明,该智能节点具有实时性好、扩展性能好、可靠性高、抗干扰能力强等特点,初步达到较高的性能指标。 In the CAN bus node, using AT89C52, SJA1000 independent controller, high-speed optocoupler 6N137 and CAN bus transceiver 82C250 hardware circuit design, and CAN bus intelligent node software design. CAN communication interface receives the host computer’s data, it will spread to all nodes on the bus. Experimental results show that the intelligent node has the characteristics of good real-time performance, good scalability, high reliability and strong anti-interference ability, initially reaching a higher performance index.