本文将介绍CAN 总线节点的设计以及在实时操作系统Small RTOS51 下CAN 总线的数据接收与发送原理。读者通过阅读本文可以了解一个CAN 节点的设计过程, CAN 总线接口驱动程序的编写以及实时操作系统Small RTOS51 简单应用。 关键词 CAN 总线;Small RTOS51;实时操作系统;SJA1000 Incepting and sending data of CAN bus with Small RTOS51 WANG Gong-cui1 ZHANG Xiu-juan1 JIA Shi-sheng2 (1.Institude of Science and Engineering , Shandong University of Science and Technology, Shandong Qingdao 266510, China 2.DEPT. of Electro-mechanical Engineering , , Shandong University of science and technology, Shandong Taian 266510, China) Abstract:This Article will introduce how to design one CAN bus note and the CAN bus how to incept and send data with Small RTOS51. Readers can know the designing process of one CAN bus note, how to write the drive programme of the CAN bus interface and the application of Small RTOS51. Key Words:CAN Bus; Small RTOS51; Real Time OS; SJA1000