A method for refresh control module
A control module and control unit technology, applied in the direction of instruments, electrical digital data processing, calculation, etc., can solve the problems of erasing, not verifying the integrity of files in the control module, not verifying the files to be downloaded, etc., to achieve The effect of preventing errors
Inactive Publication Date: 2019-03-12
LVCHI AUTO TECH SHANGHAI CO LTD
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Problems solved by technology
[0004] In the existing scheme, there are the following problems: the legitimacy of the file to be downloaded will not be verified before downloading; whether the file to be downloaded is applicable to the current control module will not be verified before downloading; File integrity; every download wipes the entire address space
Method used
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Embodiment Construction
[0019] The technical solution of the present invention is clearly and completely described below, obviously, the described embodiments are only some embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0020] A method for refreshing a control module of the present invention includes the following steps in turn:
[0021] (1) Obtain the file to be downloaded, the file to be downloaded includes the data to be downloaded and the address to be downloaded.
[0022] (2) Add a data verification area for the file to be downloaded, and the data verification area includes: a signature verification item, an applicable control unit verification item, and a digest verification item.
[0023] (3) Determine the data to be refreshed and the address to be refreshed according to the ...
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The invention discloses a control module refreshing method. Firstly, a file to be downloaded is obtained. The file to be downloaded comprises data to be downloaded and address to be downloaded. 2, adding a data checking area to that download file, and determining the data to be refreshed and the address to be refreshed accord to the data to be downloaded and the address to be downloaded; Extracting the signature verification item of the data verification area and the verification item of the applicable control unit for verification, extracting the original summary information in the data verification area after the signature verification item and the verification item of the applicable control module pass the verification, and storing the original summary information in the buffer; Then downloading the data to be refreshed to the address to be refreshed; Finally, the abstract check term of the file to be downloaded is extracted for verification, and when the abstract check term passesthe verification, the valid flag of the downloaded file is set. The invention can prevent illegal and unsuitable files from being downloaded to the control module, and can check the integrity of the files in the control module after the downloading is completed, thereby preventing errors in the downloading process.
Description
technical field [0001] The invention relates to the field of automobile control modules, in particular to a control module refreshing method. Background technique [0002] In today's automotive technology world, it is common to perform a software refresh of the vehicle's control modules in order to eliminate bugs in existing controllers or the need for updated functionality. [0003] At present, the general solution for vehicle control module software refresh is: allocate a space in the flash memory of the control module, and this space will not be erased when refreshing, and burn the boot loader into this space through the programmer. , the bootloader guides the upper computer to control the flashing process, and downloads the file to be downloaded to the control module through the bootloader, wherein the file to be downloaded can include the application program and the calibration file, or the file to be downloaded can only include the application program. [0004] In the...
Claims
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IPC IPC(8): G06F8/654
CPCG06F8/654
Inventor 林义
Owner LVCHI AUTO TECH SHANGHAI CO LTD