CAN (controller area network) bus communication method for reducing frame conflicts

A technology of CAN bus and communication method, which is applied in the direction of bus network and data exchange through path configuration, which can solve the problems of low CAN communication efficiency and poor real-time performance, reduce the number of frame collisions, simplify implementation, and improve real-time performance Effect
CN103179010AInactive Publication Date: 2013-06-26CHINA NORTH VEHICLE RES INST
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NORTH VEHICLE RES INST
Publication Date
2013-06-26
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a CAN (controller area network) bus communication method for reducing frame conflicts. Data with one or two bytes is defined in a high-frequency CAN frame to be used at an index number, one or multiple bytes are defined again to be served as index data, implication of the index data is defined by the index number, low-frequency data required transmission is filled in corresponding index data, and accordingly low-frequency data is embedded in the high-frequency CAN frame, synchronous transmission of data of different speed is achieved, and CAN frame conflicts are reduced.
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Description

technical field

[0001] The invention relates to a CAN bus communication method for reducing frame conflicts Background technique

[0002] At present, CAN (Controller Area Network) communication is increasingly used in vehicle electronic control, industrial sites and other occasions. CAN communication solves the problems of multi-master communication handshake and arbitration.

[0003] CAN communication is generally widely used in vehicle electronic control. The real-time performance of CAN communication is very important to the safety of vehicles. Adopting this scheme has a good effect on improving the safety of vehicles, so it has a broad application prospect.

[0004] When CAN communication transmits a large amount of data and the frequency of communication is high, since the data sent by each CPU is random, some of them are multi-frame bursts, which will inevitably lead to aggravated frame collision, which will cause many frames to be lost, and communication failure, resu...

Claims

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