CAN communication protocol of finished automobile bus control system

A CAN communication and bus control technology, applied in the direction of bus network, comprehensive factory control, comprehensive factory control, etc., can solve problems such as non-protocol optimization design, achieve real-time design, high real-time design, and increase effective data throughput Effect

Active Publication Date: 2014-06-04
HIGER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the CAN bus control in the automotive electronics industry is the application of the SAE1939 protocol, and the protocol has not been optimized for the application characteristics.

Method used

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  • CAN communication protocol of finished automobile bus control system
  • CAN communication protocol of finished automobile bus control system
  • CAN communication protocol of finished automobile bus control system

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Embodiment 1

[0027] This embodiment describes a CAN communication protocol of a vehicle bus control system. The vehicle bus control system includes a vehicle control unit, a CAN node, and a CAN bus connecting the vehicle control unit and each CAN node. The vehicle bus control system The CAN communication frame used to transmit instructions in the CAN communication protocol is as follows: figure 1 As shown, the 29bit extended frame is adopted, and the CAN communication protocol adopts a multi-consumer model.

[0028] The multi-consumer model adopted by the communication protocol, the specific communication mode is as follows: figure 2 As shown, the SDO source address is supported. The node that generates the data puts the data with its own node ID on the CAN bus, and the node that generates the data can be configured to receive the data sent by the node.

[0029] The communication protocol supports object self-check and supports SDO protocol. The CAN nodes of the vehicle bus control syst...

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Abstract

The invention discloses a CAN communication protocol of a finished automobile bus control system. The finished automobile bus control system comprises a finished automobile control unit, CAN nodes and a CAN bus which connects the finished automobile control system with the CAN nodes, CAN communication frames for transmitting commands in the CAN communication protocol of the finished automobile bus control system are 29 bit extended frames, and a multi-customer model is adopted in the CAN communication protocol. According to the CAN communication protocol of the finished automobile bus control system, the supporting number of the CAN nodes is increased by increasing the length of the communication frames, a communication model is optimized by the adoption of the multi-customer model, real-time communication is well supported, the communication protocol supports object dictionary reading and writing, the configuration design is optimized by optimizing the NMT management mode, and then support of finished automobile fault diagnosis is achieved.

Description

technical field [0001] The invention relates to a CAN communication protocol of a vehicle bus control system. Background technique [0002] At present, the CAN bus control in the automotive electronics industry is the application of the SAE1939 protocol, and the protocol has not been optimized for the application characteristics. With the development of the industry, the development of Internet of Vehicles technology, remote diagnosis technology and new energy buses, the types and quantities of data that need to be transmitted on the bus continue to increase, and the real-time requirements are also more stringent. Contents of the invention [0003] The purpose of the present invention is to provide a CAN communication protocol of the vehicle bus control system, which improves the real-time performance of CAN communication and reduces the communication occupancy rate of the CAN bus. [0004] In order to solve these problems in the prior art, the technical solution provided...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40G05B19/418
CPCY02P90/02
Inventor 刘正山张世平范宣禄李中延
Owner HIGER
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