基于单片机的CAN总线接口设计与实现

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。

Design and Implementation of CAN Bus Interface Based on Microcontroller Unit

In the CAN bus node,AT89C52,the hardware circuit is designed including independent controller SJA1000,high-speed optocoupler 6N137 and 82C250 CAN bus transceiver. The software design of the intelligent CAN bus node is programed. The experimental result indicates that the intelligent node has good timeliness,good expansion performance,high reliability,strong anti-jamming ability and so on,which initially achieves the high performance index.