Method based on controller area network (CAN) bus and used for conducting batch upgrading for device firmware

Abstract

A method based on a controller area network (CAN) bus and used for conducting batch upgrading for device firmware relates to data broadcasting on the bus, in particular to upgrading of field terminal device firmware on the CAN bus. The method is finished based on an upgrading server connected onto the bus and provided with a built communication protocol and the field terminal device, and the firmware of the field terminal device needs to be upgraded. Upgrading files are stored in the upgrading server, the upgrading server sends broadcasting request of upgrading starting, the broadcasting sends upgrading data packets, when a device receives the upgrading data packets, a packet losing condition is judged and uploaded, and the server broadcasts lost data packets till the device receives all the files accurately or maximum broadcasting times are exceeded.

Description

technical field

[0001] The invention relates to the field of computer technology, in particular to data broadcasting on the bus, and more specifically, to the upgrade of the firmware of local terminal equipment on the CAN bus. Background technique

[0002] CAN is the abbreviation of Controller Area Network (CAN). It is one of the most widely used field buses in the world and is widely used in industrial control and automotive electronics.

[0003] Generally speaking, to upgrade the firmware of the device through the bus, an upgrade server with files to be upgraded is required, and the upgrade server initiates the upgrade command, and then upgrades each device. When multiple devices are connected to the bus and the firmware of the devices is the same, each device needs to be upgraded in turn, which takes a long time. Because the environment where the CAN bus is located is susceptible to external interference, it will cause bit errors or even loss of data frames, and it will ...

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