Instrument and multimedia interconnection CAN bus communication device and method

A CAN bus and multimedia technology, applied in the field of automotive electronics, can solve the problems of low communication efficiency, unreliable communication, and inflexible communication, and achieve the effect of low bus load rate and flexible communication

Pending Publication Date: 2018-05-04
SAIC-GM-WULING AUTOMOBILE CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to provide a CAN bus communication method and device for instrument and multimedia interconnection, aiming to solve the problems of low communication efficiency, unreliable communication and inflexible communication between the instrument and multimedia

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  • Instrument and multimedia interconnection CAN bus communication device and method
  • Instrument and multimedia interconnection CAN bus communication device and method
  • Instrument and multimedia interconnection CAN bus communication device and method

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Embodiment Construction

[0040] The present invention transmits the method for signal with CAN bus, as Figure 4 As can be seen from the shown structural diagram, the present invention connects the instrument and multimedia in parallel on the bus, and carries out information transmission through the mode of interconnection message. In the present invention, the definition of interconnection message is: the interconnection message of multimedia is a periodic change type message (including interconnection request message, single-frame message, multi-frame message), instrument interconnection message is an event message.

[0041] Through experiments, it is found that it is optimal to set the basic communication cycle to 100ms, such as figure 1 As can be seen from the flow chart shown, the present invention firstly interconnects the multimedia with the instrument. The specific steps are that when the position of the ignition device of the car is turned from OFF to ACC or ON, the multimedia detection devic...

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Abstract

The invention provides an instrument and a multimedia interconnection CAN bus communication method. The method includes the steps of A, a multimedia detection device detects an ignition device; B, aninstrument detection device detects the ignition device; after interconnection succeeds, multimedia uses a periodic variation message to transmits an interconnection message to the instrument, and theinstrument transmits feedback information to the multimedia after receiving the interconnection message; D, when the ignition device changes from an ON position to a non-ON position or the multimediadetection shutdown is triggered, interconnection between the multimedia and the instrument is stopped. The method has the advantages that the problems that the communication between the automobile instrument and the multimedia is low in efficiency and unreliable, and the method is low in bus loading rate, flexible in communication and the like.

Description

technical field [0001] The invention belongs to the field of automotive electronics, in particular to a CAN bus communication device and method for instrument and multimedia interconnection. Background technique [0002] During the driving process, if the driver wants to understand the relevant information displayed by the multimedia, he can only observe the large multimedia screen, which will distract the driver's attention and cause a series of safety problems. In order to avoid such incidents, it is necessary to display relevant multimedia information on the instrument for the driver to view, so as to reduce driver distraction and improve driver safety. Contents of the invention [0003] The object of the present invention is to provide a CAN bus communication method and device for instrument and multimedia interconnection, aiming to solve the problems of low communication efficiency, unreliable communication and inflexible communication between the instrument and multi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R16/023
CPCB60R16/023
Inventor 覃华强彭杨魏鹿义杨汉飞陈兴渝
Owner SAIC-GM-WULING AUTOMOBILE CO LTD
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