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High-and-low speed CAN bus compatible method and equipment as well as readable storage medium

A CAN bus, high and low speed technology, applied in the field of automotive electronics, can solve problems such as errors and manual switching

Inactive Publication Date: 2018-02-02
SHENZHEN ROADROVER TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has two bus transceivers, and the switching between high and low speed needs to be done manually. This manual switching is easy to cause mistakes

Method used

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  • High-and-low speed CAN bus compatible method and equipment as well as readable storage medium
  • High-and-low speed CAN bus compatible method and equipment as well as readable storage medium
  • High-and-low speed CAN bus compatible method and equipment as well as readable storage medium

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] The embodiment of the present invention discloses a high and low speed CAN bus compatible method, see figure 1 shown, including:

[0028] S11: Configure the CAN bus as a high-speed mode, and judge whether the bus transceiver has received the corresponding message data within the high-speed mode discrimination time; if yes, start the data reception of the bus network; if not, then directly execute S12;

[0029] S12: Configure the CAN bus as a low-speed ...

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Abstract

The invention discloses a high-and-low speed CAN bus compatible method, which comprises the following steps of step 1.configuring a CAN bus to a high speed mode and judging whether a bus transceiver receives corresponding message data within the high speed mode discrimination time; if yes, starting data reception of a bus network; if no, directly executing the step 2; and step 2.configuring the CAN bus to a low speed mode and judging whether the bus transceiver receives the corresponding message data within the low speed mode discrimination time; if yes, starting data reception of the bus network; if no, directly executing the step 1. One bus transceiver is provided and no toggle switch is provided, so that the hardware cost is reduced. Compared with the prior art, the discrimination is more accurate, the efficiency is improved, the error rate is reduced and the operation and the maintenance are simpler. The invention also discloses high-and-low speed CAN bus compatible equipment and areadable storage medium.

Description

technical field [0001] The invention relates to the field of automotive electronics, in particular to a high and low speed CAN bus compatible method, device and readable storage medium. Background technique [0002] The number of computer control units in modern automobiles is large, and each control unit has different requirements on the system's impact time. Some systems have high requirements for real-time performance. Destruction, such as brake anti-lock brake control units, airbags, etc., these control units are small in number, high in real-time and stability requirements, and a high-speed CAN network with a transmission rate of 500Kpbs is designed; while some systems such as lighting control, air conditioning Control and other requirements for response time are relatively low. There are a large number of these control units, and the transmitted data is complicated. Accuracy and stability are more important than real-time performance. The design transmission rate is 12...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40
CPCH04L12/40013H04L12/4013H04L2012/40215
Inventor 王小鑫
Owner SHENZHEN ROADROVER TECH
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