Abstract
This paper introduces the reasons why the asymmetric processor approach is needed in automotive control systems and discusses the technical issues of this approach and the technical requirements to solve these issues. To meet the technical requirements, this paper deals in depth with how to synchronize the independent Operating Systems (OS) of two microcontrollers (main microcontroller and assistant microcontroller). This is a cheap, easy and efficient method to implement in real automotive control systems. This paper also shows how much the performance and safety of the control system are improved by using OS synchronization compared to previous control systems. In the conclusion, the requirements of the control algorithm and RTOS to achieve proposed technology in the field will be discussed.
Keywords: Failsafe, Asymmetric processor approach, Synchronization, Controller integrity, Scheduling