说明：  autosar 网络管理状态转换图、设计原理、
(This specification describes the functionality, API and the configuration for the AUTOSAR Basic Software module CAN State Manager. The AUTOSAR BSW stack specifies for each communication bus a bus specific state manager. This module shall implement the control flow for the respective bus. Like shown in the figure below the CAN State Manager (CanSM) is member of the Communication Service Layer. It interacts with the Communication Hardware Abstraction Layer and the System Service Layer.)