Vehicle-mounted electronic control unit data flashing method and system based on UDS

Abstract

The invention discloses a vehicle-mounted electronic control unit data flashing method and system based on a UDS, and relates to the field of data flashing, and the method comprises the steps: segmenting a flashing file based on a logic partition of a vehicle-mounted electronic control unit program, obtaining a plurality of data segments, and obtaining a check code of each data segment; obtaining data segments in the vehicle-mounted electronic control unit and a check code of each data segment based on the logic partition of the vehicle-mounted electronic control unit program; comparing the check code of the data segment in the vehicle-mounted electronic control unit with the check code of the corresponding data segment in the flash file to obtain the data segment with the check code difference; and deleting the data segments with different check codes in the vehicle-mounted electronic control unit, and downloading the corresponding data segments in the flashing file to the vehicle-mounted electronic control unit to complete data flashing of the vehicle-mounted electronic control unit. According to the invention, the failure rate of the flashing process can be reduced while the flashing time consumption is reduced.

Description

technical field [0001] The invention relates to the field of data flashing, in particular to a method and system for flashing data of a vehicle electronic control unit based on UDS. Background technique [0002] At present, in the process of vehicle after-sales service upgrade, it is often encountered that the software program of the vehicle electronic control unit needs to be upgraded. Generally speaking, the software program of the vehicle electronic control unit is a data file in a special format, which contains ten Hexadecimal byte data, and memory address information corresponding to the data. With the development of networking and intelligence in the automotive industry, the control strategy of the vehicle electronic control unit has become more and more complex, and the integration degree of the vehicle electronic control unit has become higher and higher, resulting in the data matching the vehicle electronic control unit The files are also getting bigger and bigger,...

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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