基于一种干扰机制的车载CAN网络 BUSOFF测试方案

整车CAN总线测试工作是整个平台架构的重要部分。本文基于美国Vector公司的CANOE和CANSTRESS测试工具实现了一种对整车CAN网络BUSOFF进行系统级的测试方案。首先测试每一节点的BUSOFF恢复机制是否符合预定义的规范。其次使用最高优先级报文或网络管理报文的干扰机制来测试在CAN网络BUSOFF时各个节点的互不干扰性。本文重点阐述了此干扰机制的原理，从理论上说明此干扰机制的正确性，通过编写测试用例验证了此干扰机制以及整体测试方案的准确性、高效性与有效性，并且完善了整车CAN网络的测试方案与测试规范。

A BUSOFF Testing Scheme of Vehicle CAN Based on The Interference Mechanism

Test work of vehicle CAN bus plays an important role in the overall platform design. Based on the testing tools CANOE and CANSTRESS of Vector Company, the paper achieves a system-level BUSOFF testing scheme of vehicle CAN. First, verify that BUSOFF recovery mechanism of each node meets predefined Standard. Second, the scheme uses interference mechanism of the highest priority packets or network management packet to test each node in the network. The paper focuses on the principle of this interference mechanism, and theoretically interferes wi th the accuracy of this mechanism. By writing test cases, the paper verifies the accuracy, efficiency and effectiveness of this interference mechanism and improves the testing scheme and testing specifications of the vehicle CAN networks.