基于TMS320F2812的CAN总线通信研究  

Research on CAN Bus Communication Based on TMS320F2812

作　　者：朱清祥[1] 聂汉平[1] 

机构地区：[1]长江大学电信学院,434023

出　　处：《中国科技信息》2007年第18期120-121,123,共3页China Science and Technology Information

摘　　要：CAN总线是一种串行通讯协议,适用于分布式控制系统的底层网络通信。由于标准的CAN协议为同一节点的信息分配固定的优先级,网络控制的实时性得不到保证。本文提出了一种利用TMS320F2812的增强型CAN模块实现网络监控的方法,通过标志符为CAN总线提供不同的优先级,在确保网络控制实时性的同时兼顾了CAN总线利用率,取得了较好的效果。在波特率高达1Mb/s的条件下,数据传输稳定、可靠,延迟时间少。CAN bus is a serial communication protocol and adapts to bottom layer communication of distributed control system.It can＇t get the good performance in network control system because all the information of a node has the same priority.The article puts forward a method by which the network control is realized using the enhanced CAN module of TMS320F2812,which provide different priority for CAN bus with identification.The real-time performance is ensured at the high utilization ratio of CAN bus and it get good performance, In the case of 1Mb/S（Baud Rate） data transmission is stable and reliable with little delay.

关 键 词：DSP CAN总线 实时性 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]