冗余CAN总线系统设计

The Design and Realization of the Redundant CAN BUS System

为了提高通信系统的可靠性和稳定性,研究了基于DSPTMS320LF2407、SJA1000和PCA82C250的冗余CAN总线系统,给出了总线结构图、硬件原理框图和软件流程图,详叙了不同故障的检测方法和切换原理,开发了基于该冗余设计原理的CAN总线通信系统。测试结果表明,该设计可在总线出现故障的情况下,可靠地切换至另一路备份总线,保证了系统通信的稳定性与可靠性。

In order to improve the dependability and stabihty of the communications system , we studied the Redundant CAN BUS based on DSP TMS320LF2407, SJA1000 and PCA82C250. the CAN BUS framework, hardware schematic diagram and software flowchart are included in this article, furthermore it exphcates the means to different exceptions and switch theories. When one bus breaks down the system can switch to the other bus rehably, the communication system was proved to be steady and rehable.