一种面向功能安全的新型软件测试方法

随着人们对汽车功能安全的关注,ISO26262成为汽车电控系统开发的重要标准.在汽车电控系统中,微控制器的应用软件对各种故障的容忍度是重要的安全指标.当应用软件设计完成后,对故障容忍的测试是至关重要的.选用AURIX系列TC397芯片作为芯片原型,引入Virtualizer开发套件(VDK)虚拟建模工具,搭建真实的软件运行环境,对基于TC397开发的应用软件在软硬件集成的层面上进行故障注入测试,利用故障注入的方法,查看基于TC397开发的系统软件行为及配置是否正确,验证了ASIL-D目标下的软件安全机制的诊断覆盖率.研究结果为芯片级别软硬件集成测试提供了方法.

A new software testing method for functional safety

With people''s attention to the functional safety of automobile, ISO26262 has become an important standard for the development of automobile electronic control system. In the automotive electronic control system, the tolerance of the application software of micro-controller to various faults is an important safety index, so when the application software is designed, the test of fault tolerance is very important. the AURX series TC397 chip is selected as the chip prototype, the virtual modeling tool of VDK is introduced, the real software running environment is built, and the application software based on TC397 is tested on the level of software and hardware integration, ?by using the method of fault injection, and check the system software behavior and configuration based on TC397. The coverage of software security mechanism under the target of ASIL-D is verified. It provides a method for integrated test of hardware and software at chip level.