[UDS unified diagnostic service] IV. typical diagnostic service (4) - online programming function unit (0x34-0x38)

Four 、 Diagnose typical services （4）— Online programming function unit

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link ：https://download.csdn.net/download/sinat_40003796/85031818

Diagnostic service of each functional unit ：

• Diagnosis and communication management function unit
• Data transmission function unit
• Read fault information function unit （ Storage data transmission function unit ）
• Online programming function unit （ Upload and download function unit ）
• function / Component test function unit （ Routine function unit ）
• Input / output control unit （0x2F）

This article mainly explains “ Online programming function unit （ Upload and download function unit ）”, For the rest, see other articles .

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“ Online programming function unit （ Upload and download function unit ）” Services included ：

Upload and download function :

• RequestDownload (0x34) service
• RequestUpload (0x35) service
• TransferData (0x36) service
• RequestTransferExit (0x37) service
• RequestFileTransfer (0x38) service

Download function to achieve (34—>36—>37) Example ：

（1）RequestDownload (0x34) service

• Initialize data transfer
• ECU After receiving the request , After completing all pre download preparations , Send a positive response .

Request message ：

Positive response ：

（2）TransferData (0x36) service 【 To be added 】

（3）RequestTransferExit (0x37) service 【 To be added 】