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Functions and configuration of dcm09- readdatabyidentifier ($22) [based on DaVinci configurator classic]

2022-07-22 14:41:00 【Automotive electronics and software development】

List of articles

1 ReadDataByIdentifier ($22) The function of
2 Interface information
3 Configuration steps

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About ReadDataByIdentifier ($22) Please refer to my article for the explanation of the agreement 【UDS02- Read the data service according to the identifier 【ServiceID = 0x22】】

1 ReadDataByIdentifier ($22) The function of

This service provides ECU Read access of internal data structure , This internal data structure consists of identifiers (DID) Mark . The tester can use the diagnostic apparatus 【 such as Canoe Tools 】 Access multiple at the same time in a request DID.

If enabled SilentBSW And disable paging reading , When reading with variable length DID when ,DCM Will verify the configured DID The maximum length of read bytes of does not exceed DCM Of Internal buffer . therefore , Only after reading the variable length DID Everything before DID after , The remaining space in the buffer is at least greater than or equal to the variable length DID Maximum length of , To read variable length DID.

So how to get DID What about the length ？ On receiving UDS service

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