CAN communication-based text transmission method

A CAN communication and text transmission technology, applied in the field of text transmission based on CAN communication, can solve problems such as text information display errors, and achieve the effect of avoiding text information display errors

Inactive Publication Date: 2017-02-01
CHERY COMML VEHICLE ANHUI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing automobile communication adopts the method of combining CAN communication and LIN communication, but when communicating text information between vehicle modules through CAN communication, the text information is often displayed due to differences in the fonts stored by each module itself. mistake

Method used

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  • CAN communication-based text transmission method
  • CAN communication-based text transmission method
  • CAN communication-based text transmission method

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Embodiment Construction

[0013] Such as Figure 1-2 As shown, the present invention includes all modules required for text interaction in the vehicle, and the modules need to have CAN transceivers, CANH and CANL twisted pairs, unified high-speed CAN signal encoding and unified UniCode text encoding.

[0014] First, assign fixed CAN ID information to the multimedia modules that need text interaction information, which is used to indicate their identity during text exchange. Each module is assigned only one sending ID and one receiving ID, which are used for sending and receiving respectively. Use; further, the composition of the distributed CAN text information mainly includes text frame control bits, text length control bits, and data type control bits, and the arrangement of bits conforms to the signal encoding method of the vehicle CAN; further, each multimedia module adopts a unified Unicode encoding method, the generated program is stored in the microcontroller and waits to be called; if module A ...

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Abstract

The invention discloses a CAN communication-based text transmission method which is characterized by comprising the following steps: distributing fixed CAN ID information to multimedia modules to be subjected to text information interaction first to show the identities of the multimedia modules during text exchange, and then distributing constitutes of CAN text information; and generating programs stored in a single-chip microcomputer for calling by all the multimedia modules by adopting a Unicode mode. By the adoption of the method, text and character information transmission between the multimedia modules such as an automobile dashboard, a navigator and a panoramic instrument is realized based on a CAN communication technology; a text information display error due to a difference of character libraries stored in the respective modules is avoided; and no hardware equipment and no production cost are added.

Description

technical field [0001] The invention relates to the field of automobile communication, in particular to a text transmission method based on CAN communication. Background technique [0002] At present, following the development needs of automobiles, there are more and more interactive information before the multimedia module. Existing automobile communication adopts the method of combining CAN communication and LIN communication, but when communicating text information between vehicle modules through CAN communication, the text information is often displayed due to differences in the fonts stored by each module itself. mistake. [0003] Aiming at the above problems, a text transmission method is provided, which realizes text and character information transmission among multimedia modules such as automobile instrumentation, navigation and panorama based on CAN communication technology. Contents of the invention [0004] The technical problem to be solved by the present inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40
CPCH04L12/40H04L2012/40273H04L2012/40215
Inventor 刘淑娟侯亚飞赵松岭
Owner CHERY COMML VEHICLE ANHUI
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