autosar dem中Event destination是什么
时间: 2023-12-14 20:05:18 浏览: 144
在AUTOSAR DEM(Diagnostic Event Manager)中,Event destination(事件目标)是指将诊断事件发送到的特定目标。这些目标可以是ECU(Electronic Control Unit)内部的其他模块,也可以是外部的诊断工具或设备。通过将事件发送到适当的目标,可以实现故障诊断、故障处理和故障记录等功能。具体的Event destination取决于应用程序的需求和系统配置。
相关问题
autosar dem之event的nvm存储详解
在AUTOSAR DEM (Diagnostic Event Manager)中,Event是指在车辆的诊断系统中检测到的特定故障或问题的发生。为了存储这些Event的信息,AUTOSAR DEM支持使用NVM(Non-Volatile Memory)存储方式。
NVM是指非易失性存储器,它可以在断电后保留数据。在AUTOSAR DEM中,使用NVM存储Event的目的是为了在车辆下次启动时能够恢复和检测出之前发生的故障或问题。这对于车辆的诊断功能和维护非常重要。
在存储Event的过程中,AUTOSAR DEM将Event的相关信息进行编码,并将其存储到NVM中。这些信息包括Event的ID、状态、错误代码和时间戳等。通过将这些信息存储到NVM中,AUTOSAR DEM可以在下次车辆启动时读取并解析这些信息,从而恢复之前的故障和问题。这个过程类似于一个事件日志,可以在车辆需要进行故障排查或维护时提供有关之前发生的故障和问题的详细信息。
在实际实现中,AUTOSAR DEM使用AUTOSAR标准提供的NVRAM模块来管理NVM的读写操作。这个模块负责将Event的信息写入到NVM,以及在车辆启动时从NVM中读取和解析存储的Event信息。此外,为了提高存储效率和可靠性,AUTOSAR DEM还可以使用压缩算法来对Event信息进行压缩存储。
总结起来,AUTOSAR DEM使用NVM存储Event的目的是为了保留和恢复之前发生的故障和问题的信息,以供车辆的诊断和维护使用。通过使用NVM存储,AUTOSAR DEM可以在断电后仍然保持Event信息,并在车辆启动时进行读取和解析。这对于提高车辆的维护性和故障排查能力非常重要。
autosar dem event status
The AUTOSAR DEM (Diagnostic Event Manager) provides information about the status of diagnostic events in a vehicle's electronic control unit (ECU). The DEM event status includes several states that indicate the current status of a diagnostic event:
1. Pending: This is the initial state of a diagnostic event. It means that the event has been detected, but the diagnostic process has not yet been completed.
2. Confirmed: This state indicates that the diagnostic process has been completed and the event has been confirmed as valid.
3. Failed: This state indicates that the diagnostic process has been completed and the event has been confirmed as invalid.
4. Pending Storage: This state indicates that the diagnostic event has been detected and is pending storage in non-volatile memory.
5. Confirmed Stored: This state indicates that the diagnostic event has been confirmed as valid and has been stored in non-volatile memory.
6. Failed Stored: This state indicates that the diagnostic event has been confirmed as invalid and has been stored in non-volatile memory.
The DEM event status is used to monitor the health of a vehicle's systems and to provide diagnostic information to technicians and service personnel.
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