A UDS-based method and system for flashing vehicle electronic control unit data

Abstract

The invention discloses a UDS-based data flashing method and system for a vehicle-mounted electronic control unit, and relates to the field of data flashing. data segment and obtain the check code of each data segment; based on the logical partition of the vehicle electronic control unit program, obtain the data segment in the vehicle electronic control unit and the check code of each data segment; the data in the vehicle electronic control unit Compare the check code of the segment with the check code of the corresponding data segment in the flash file to obtain the data segment with a different check code; delete the data segment with a different check code in the vehicle electronic control unit, and download the flash file The corresponding data segment in the file is sent to the vehicle electronic control unit to complete the data flashing of the vehicle electronic control unit. The present invention can reduce the failure rate of the flashing process while reducing the time-consuming of flashing.

Description

Technical field [0001] The present invention relates to the field of data brushing, specifically to a UDS-based vehicle electronic control unit data brushing method and system. Background [0002] At present, in the process of after-sales service upgrade of vehicles, it is often encountered that the software program upgrade of the vehicle electronic control unit is often encountered, under normal circumstances, the software program of the vehicle electronic control unit is a special format data file, which contains hexadecimal byte data, as well as memory address information corresponding to the data. With the development of the automotive industry networking and intelligence, the control strategy of the vehicle electronic control unit has become more and more complex, and the integration of the vehicle electronic control unit has become higher and higher, resulting in the data files supporting the vehicle electronic control unit being larger and larger, making the after-sales so...

AI Technical Summary

Problems solved by technology

[0004] 1. During the flashing process, all data segments in the file will be erased and written, and the CAN (ControllerArea Network, Controller Area Network) bus can only transmit a limited amount of data. If the flashing file is large, it will cause It takes a long time to write;

[0005] 2. During the flashing process, only the whole package of the flashing file can be transferred, and the transmission may be interrupted unexpectedly during the data transmission process. The failure rate of the flashing process;

[0006] 3. After the data transmission is completed, only the dependency check of the software program will be performed, and the transmitted data will not be verified, resulting in low security

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