Transferdata 0x36 servicePoorani

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› The TransferData service is used by the client to transfer data either from the client to the server (download) or from the server to the client (upload).

› The data transfer direction is defined by the preceding RequestDownload or RequestUpload service.

› The Transfer Data service transmits blocks of data and checks so that the blocks are received in the right order.

› If the right block is received, then it is written to correct memory location and a positive response is sent.

Description of service(0x36)

April 18, 20232Author, © Continental AG

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Transferdata request message :

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•The parameter transferRequestParameter in the transferData request message shall contain parameter(s) which are required by the server to support the transfer of data.

•For a download, the parameter transferRequestParameter could include the data to be transferred.

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Positive response

April 18, 20234Author, © Continental AG

•The parameter transferResponseParameter (TREP_) in the transferData positive response message shall contain parameter(s) which are required by the client to support the transfer of data.

•For a download, the parameter transferResponseParameter is a checksum computed by the server.

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Negative response

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Transfer data implementation Step -1 : Download process

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Step-2 : Transfer data

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Step-3 : Transferexit

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KWP2000 Trace

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Trace

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Trace

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› The TransferData service request includes a blockSequenceCounter to allow for an improved error handling in case a TransferData service fails during a sequence of multiple TransferData requests.

› The blockSequenceCounter of the server shall be initialized to one (1) when receiving a RequestDownload (34 hex) or RequestUpload (35 hex) request message.

› This means that the first TransferData (36 hex) request message following the RequestDownload (34 hex) or RequestUpload (35 hex) request messge starts with a blockSequenceCounter of one (1).

Blocksequence counter

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UDS Trace

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Negative response

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Negative response

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