Bootloader method for supporting simultaneous upgrading of multiple ECUs of the same type and allowing ECUs to have program mismatching preventing function

Abstract

The invention provides a Bootloader method for supporting simultaneous upgrading of multiple ECUs of the same type and allowing the ECUs to have a program mismatching preventing function. The Bootloader method includes selecting specific ECUs in upper computer software during App program upgrading of the ECUs, sending an App program upgrade request mark to the ECUs, sending ECU type broadcast addresses and ECU private addresses to the upper computer software when the ECUs meeting the conditions receive the request, looking up a corresponding feature code in a burning file by the upper computersoftware according to the received ECU type broadcast addresses when the upper computer software loads the burning file, and determining whether or not the upper computer software sends data of the burning file to the ECUs for App program upgrade according to the matching condition of the corresponding feature code. The Bootloader method has the advantages that the method is simple, convenient and rapid to operate; a program is provided with a standby inlet for jumping to the App program upgrade; even if an old App program is completely unavailable, a new App program can be upgraded to the ECUs, and the reliability is high; matching check is performed on the burning file and the online ECUs directly, and mismatching between the program and the ECUs is prevented.

Description

technical field [0001] The invention relates to an ECU upgrading method, in particular to a Bootloader method which supports simultaneous upgrading of a plurality of similar ECUs and has the function of preventing program mismatch. Background technique [0002] In the process of development, debugging and post-maintenance of the automotive electronic control unit ECU, it is necessary to upgrade the ECU program at different frequencies. The traditional upgrade method is mainly to use the dedicated programmer or emulator of the chip to upgrade through the emulation debugging interface on the board. However, after the ECU is installed in a subsystem or a complete vehicle, the ECU has been wrapped in layers of protection and structural components. , If the ECU is disassembled to upgrade the software program, it will not only take time and effort, but also may increase some unnecessary security risks in the process of repeated disassembly and assembly. [0003] For the case of m...

AI Technical Summary

Problems solved by technology

The traditional upgrade method is mainly to use the dedicated programmer or emulator of the chip to upgrade through the emulation debugging interface on the board. However, after the ECU is installed in a subsystem or a complete vehicle, the ECU has been wrapped in layers of protection and structural components. , if the ECU is disassembled to upgrade the software program, it will not only take time and effort, but also may increase some unnecessary security risks in the process of repeated disassembly and assembly

[0003] For the case of multiple ECU upgrade programs of the same type, such as the battery sampling unit BSU in a distributed BMS, according to the size of the system, generally there are several to more than a dozen BSUs in a system. The traditional method needs to be upgraded one by one, so The practice is time-consuming, and sometimes due to improper human operation and other reasons, when upgrading the programs of various ECUs in the same communication network through the Bootloader, it may happen that the program of this ECU is programmed into another In the ECU, there is a situation where the crown is worn, which leads to the system not working normally, and the system may be accidentally damaged in severe cases.

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