Low power consumption control method and system of CAN node, and controller

A technology of CAN controller and control method, applied in transmission system, digital transmission system, data exchange through path configuration, etc., can solve the problem of CAN node erroneous wake-up, increase vehicle current consumption, CAN physical layer transceiver circuit filtering capability limited and other problems, to avoid invalid waiting, reduce wake-up times, and reduce quiescent current

Inactive Publication Date: 2017-10-20
SHANDONG ACAD OF SCI INST OF AUTOMATION
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Problems solved by technology

On the other hand, due to the limited filtering capability of the CAN physical layer transceiver circuit, when a glitch with a relatively long time length appears on the bus, the CAN node will be woken up by mistake
In addition to being awakened by itself, the CAN node will also wake up other CAN nodes through the ALIVE message, making the entire CAN network exit the dormant state, greatly increasing the current consumption of the vehicle

Method used

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  • Low power consumption control method and system of CAN node, and controller
  • Low power consumption control method and system of CAN node, and controller
  • Low power consumption control method and system of CAN node, and controller

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[0037] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0038] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0039] figure 1 It is a schematic diagram of the CAN node structure of the present invention.

[0040] exist ...

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Abstract

The invention discloses a low power consumption control method and system of a CAN node, and a controller. The control method comprises the following steps: the CAN node automatically enters a wake-up mode after being electrified, and keeps the wake-up mode when a sleep condition is not satisfied; when the CAN node satisfies the local sleep condition and the whole CAN network is in cooperative sleep, the CAN nodes disenables a CAN physical layer transceiver and enables a CAN signal and an MCU internal timer to serve as a wake-up resource, and the CAN node enters the sleep mode; when the MCU internal timer or the CAN signal wakes up the MCU, the CAN node enters a temporary wake-up mode; in the temporary wake-up mode, the CAN node is controlled to enter the sleep mode or a wake-up confirmation mode again by polling a wake-up state bit and the level of a local wake-up signal within a temporary wake-up time; and in the wake-up confirmation mode, whether an effective CAN message and a local wake-up signal is detected to control the CAN node to enter the wake-up mode or the sleep mode.

Description

technical field [0001] The invention belongs to the technical field of automotive electronics, and in particular relates to a CAN node low power consumption control method, a controller and a control system. Background technique [0002] Hyundai cars generally use the CAN network to communicate with various electronic components, and most CAN networks follow the OSEK direct network management protocol to realize the sleep and wake-up functions of CAN nodes powered by constant power. According to the OSEK direct network management protocol, after all CAN nodes with constant power supply meet the sleep conditions, the entire CAN network cooperates to enter the sleep state. At this time, the static current of the vehicle is generally a few tenths or even a few percent of that in the wake-up state. one. When a CAN node is awakened by the local wake-up condition, it will send an ALIVE message to the CAN network, and when other CAN nodes detect that a valid dominant bit appears o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40
CPCH04L12/40006H04L12/40013H04L2012/40215
Inventor 马建辉张云胡代荣孙常青
Owner SHANDONG ACAD OF SCI INST OF AUTOMATION
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