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AUTOSAR from introduction to proficiency 100 lectures (78) -autosar-dem module
2022-07-29 05:07:00 【Gatulo book】
DEM Full name “Diagnostic Event Management”, This module serves as AUTOSAR In the architecture BSW Module one , about ECU Software development is also a necessary software module , It is also particularly important to understand the attributes of the module itself and its relationship with other modules . Combined with their own development experience , I will briefly introduce and think about this module from the following six aspects .
Diagnostic fault management module mainly involves fault event monitoring , Fault information reporting 、 Fault information processing and fault information storage , The basic relationship between them is shown in the figure below 1 Shown :
chart 1 Fault reporting flow chart
Fault event triggers
The basic unit of fault monitoring is event (event), Reported events can come from BSW modular , It can also come from SW-C modular , The monitoring strategy of the event is determined by each module reporting the fault event , However, the definition of fault event shall meet the requirements of Fig 2.1 The following basic principles :
chart 2.1 Basic principles of event definition
If the event or trigger mode is not defined according to the above basic principles , Failure events may be reported repeatedly 、 Problems such as over reporting or false reporting of events , It's even hard to quickly locate the problem , It does not really play the basic characteristics of event monitoring : accuracy 、 rationality 、 Independence, etc . A good definition of fault events will lay a solid foundation for the whole fault management , Provide a powerful hand for fault analysis
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