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CAN (controller area network) bus application system and processing node numbering method

A CAN bus and processing node technology, applied in the field of vehicle engineering, can solve the problems of high cost and low ID allocation efficiency, and achieve the effect of improving efficiency and reducing hardware cost

Pending Publication Date: 2019-05-24
度普(苏州)新能源科技有限公司 +1
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AI Technical Summary

Problems solved by technology

The way to implement ID allocation in the prior art is to set a hardware circuit such as a dial switch in the processing node, and realize the ID allocation and identification of the processing node through the state of the hardware circuit, but this method not only requires additional The hardware circuit of ID allocation, and when a processing node needs to be repaired and replaced, the ID number needs to be manually reset, which not only costs a lot, but also reduces the efficiency of ID allocation.

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  • CAN (controller area network) bus application system and processing node numbering method
  • CAN (controller area network) bus application system and processing node numbering method
  • CAN (controller area network) bus application system and processing node numbering method

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Embodiment Construction

[0046]As described in the background, in the CAN bus application system in the prior art, when assigning IDs to processing modules, it is necessary to implement ID assignment and identification in combination with the status of hardware circuits located in processing nodes. Taking the DIP switch as an example, the DIP switch includes a plurality of key positions, and ID distribution and identification can be realized through different combination states of the plurality of key positions of the DIP switch in each processing node. However, this method not only needs to add hardware circuits in the processing node, but also needs to manually set the key combination state of the DIP switch, which is not only error-prone but also low in efficiency. And when a certain processing node needs to be maintained or replaced, the ID number needs to be manually redesigned.

[0047] In view of this, the embodiment of the present application provides a CAN bus application system, including: a...

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Abstract

The invention discloses a CAN (controller area network) bus application system and a processing node numbering method. In the CAN bus application system, by a state of an added connection line and anID-information-containing number message sent by a processing module, a processing node automatically completes own ID setting, automatic ID distribution can be realized without arranging a hardware circuit in the processing node, and accordingly hardware cost of the CAN bus application system is reduced. In addition, processing node ID distribution can be realized by the CAN bus application system in an ID distribution process without depending on a state of the hardware circuit, and manual resetting of ID numbers is avoided in maintenance or replacement of a certain processing node, so thatID distribution efficiency is improved.

Description

technical field [0001] This application relates to the technical field of vehicle engineering, and more specifically, relates to a CAN bus application system and a method for numbering processing nodes. Background technique [0002] CAN bus is the abbreviation of Controller Area Network (CAN) bus, and it is one of the most widely used field buses in the world. [0003] Application system reference of CAN bus figure 1 , generally includes an MCU (Microcontroller Unit; micro control unit), and multiple processing nodes connected to the MCU through a CAN bus. In the application system of CAN bus, the processing node refers to the specific processing device that is performing various tasks, such as vehicle air conditioner and so on. still refer to figure 1 , The CAN bus usually includes two signal lines, CANH and CANL. The CANH signal line can only transmit a high level or a floating state, and the CANL signal line can only transmit a low level or a floating state. [0004] ...

Claims

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Application Information

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IPC IPC(8): G05B19/042
Inventor 彭世明
Owner 度普(苏州)新能源科技有限公司
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