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MD Najmuddin Siddique All group posts
Posted in: AUTOSAR FAQ FAQ - 20/05/2010, 7:42 pm
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ECU StateManager and BSW Mode Manager - AUTOSAR 4.0 Fachgespräch
....Mode Switch indications (always issued by BSW modules) go through the BswM Bs wM for further propagation to the SW-Cs, ....eg1: If DCM ( Requests Mode) ----> Disable Normal Communication goes thru thru COM ----> It would then goto BswM (Mode control / Introductions actions) for enable or disable ---> then initiate an action to COM ---> to turn off the corresponding I-PDU groups and NM PDU:s. News
....eg2: SW-C (Requests which communication communication mode) -----> BswM -- --> ComM (provides an indication) to SW-C
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....eg3: Shutdown request from SW-C ---> goes to EcuM ---> indicates BswM about the request ---> then sends the control back to EcuM to Ideas, Suggestions, Feedback r esume esume shutdown process AUTOSAR Tools & BSWs
Query?? Query?? >>
1. Are the aboveMethodology examples flow is correct? Else Please correct me if I was wrong anywhere in my understanding... Also does AUTOSAR AUTOSAR suggest alternate Use-Case to implement to implement the above examples? Please explain.. AUTOSAR Articles 2. SW-C can makes direct calls(thru RTE) RTE) to EcuM or BswM or ComM, ?
3. IfAUTOSAR BswM BswM wants to change the EcuM state, it has communicate to EcuM only thru RTE switch calls or BswM can directly interact with Benefits EcuM AUTOSAR Tutorials 4. Does EcuM has to indicate BswM about all the request or it is not mandatory?
Please help me to correctModels the above use-cases and queries. AUTOSAR Business Thank you, Md AUTOSAR NajmuddinFAQ Siddique. AUTOSAR Artop Eventsmembers - 21/05/2010, 5:00 pm OnlyAUTOSAR visible to XING
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....Mode Switch indications (always issued by BSW modules) go through the BswM for further propagation to the SW-Cs,
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Not necessarily. necessarily. E.g. the ComM has a user user mode indication for each each user individually, individually, which can directly be read by an SW-C. SW-C. Topic here is that the AUTOSAR 4.0 approach (only using modes and the BswM) collides with the legacy approach of AUTOSAR 3.1 and before where all requests were made to ComM, EcuM.
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....eg1: If DCM (Requests Mode) ----> Disable Normal Communication goes thru COM ----> It would then goto BswM (Mode control / actions) for enable or disable ---> then initiate an action to COM ---> to turn off the corresponding I-PDU groups and NM PDU:s.
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The path is as follows: Dcm -> BswM -> Com/BusSM and finally BswM -> Dcm (for mode switch confirmation) ....eg2: SW-C (Requests which communication mode) -----> BswM ----> ComM (provides an indication) to SW-C
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Typically the use-case would be that an SW-C switches to an application mode, which the BswM detects as a necessity to activate communication and therefore requests communication communication with the ComM. The SW-C does not get a confirmation for the mode switch, unless it uses the BswM_RequestMode BswM_RequestMode API and checks whether the BswM actually switched the mode.
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....eg3: Shutdown request from SW-C ---> goes to EcuM ---> indicates BswM about the request ---> then sends the control back to EcuM to resume shutdown process
This corresponds to the AUTOSAR 3.1 (and prior) method to do t his. In AUTOSAR 4.0 you would enter an application mode or request an application with the BswM which leads to the release of an EcuM user or ( as for example in the diagnostics request EcuReset) calls EcuM_KillAllRUNRequests.
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Query?? >> 1. Are the above examples flow is correct? Else Please correct me if I was wrong anywhere in my understanding... Also does AUTOSAR suggest alternate Use-Case to implement the above examples? Please explain..
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See above. 2. SW-C can makes direct cal ls(thru RTE) to EcuM or BswM or ComM, ?
If you are developping SW-C for AUTOSAR 4.0, the preferred method is to use t he BswM only and avoid any direct interfaces to the EcuM or the ComM. The BswM is supposed to arbitrate any mode requests and either accept or reject them. 3. If BswM wants to change the EcuM state, it has communicate to EcuM only thru RTE switch calls or BswM can directly interact with EcuM
The BswM may use a direct interface to the EcuM without using the RTE. 4. Does EcuM has to indicate BswM about all the request or it is not mandatory?
The EcuM indicates all state changes to the BswM by means of the API BswM_EcuM_CurrentState. Note that this does not mean that all requests are indicated, only the state changes. Note that AUTOSAR AUTOSAR 4.0 specifies two different different variants of the EcuM, EcuM, the EcuMfixed (corresponding (corresponding to the EcuM in AUTOSAR AUTOSAR 3.1 and prior) and the EcuM (which is just a very basic EcuM EcuM managing startup and and shutdown). In the latter case, case, you will have to configure configure the different run mode with the BswM, particulary useful for ECUs which have to perform some actions in a semi-sleep mode and go to sleep again (think of BCMs). Hope this helps Oliver Debajyoti Chatterjee liked Chatterjee liked this.
MD Najmuddin Siddique - 24/05/2010, 1:50 pm
Thank you Oliver !! It was good info ...
Inactive user - 14/07/2011, 4:01 pm
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Rajkumar K Kumar - 01/11/2012, 6:50 am
Hello, I have some quires regarding BswM in Autosar 4.0
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