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CAN message priority generation and detection system and its method

A detection system and detection method technology, applied in transmission systems, digital transmission systems, data exchange through path configuration, etc., can solve the problem of inability to detect the priority of CAN messages, and achieve the effect of convenient research

Inactive Publication Date: 2009-01-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that CAN message priority cannot be detected at present, the present invention provides a CAN message priority generation and detection system and method thereof

Method used

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  • CAN message priority generation and detection system and its method
  • CAN message priority generation and detection system and its method
  • CAN message priority generation and detection system and its method

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The present embodiment will be specifically described below with reference to FIG. 1 to FIG. 3 .

[0010] The CAN message priority generation and detection system of the present embodiment is based on the CAN bus application system, and it is made up of CAN bus 4, the first node 1, the second node 2 and the third node 3, and is mounted on the CAN bus 4 with The first node 1, the second node 2 and the third node 3; the first node 1 is composed of a first processor 1-6, a detection unit 1-1, a first communication unit 1-3, a first display unit 1- 4. The first keyboard 1-2, the stop sending button A 1-7 and the start sending button B 1-5 are composed; the bus communication end of the first processor 1-6 is connected to the node communication end of the first communication unit 1-3, The bus communication end of the first communication unit 1-3 is connected with CAN bus 4 through CAN bus driver controller; The data input terminal of the device 1-6, th...

specific Embodiment approach 2

[0012] Specific implementation mode two: see Figure 4 , this specific embodiment is based on the detection method of the CAN message priority generation and detection system described in the specific embodiment one, and it carries out according to the following steps successively: 101, start the detection system, power-on preparation; 102, initialize the first node 1. The second node 2 and the third node 3; 103. Configure the message priorities of the first node 1, the second node 2, and the third node 3, that is, the first node 1, the second node 2, and the third node 3 The sending message IDs are respectively named as SENT_ID_1, SENT_ID_2, SENT_ID_3, and the priority order of the messages is: SENT_ID_1>SENT_ID_2>SENT_ID_3; 104, configure the control field and data of the first node 1, the second node 2 and the third node 3 field (for example: the DLC (data length code)=0010 (binary) of the control field, then the data field can be arbitrarily configured as two bytes: 0111011...

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Abstract

This invention relates to a system for generating and detecting CAN message priority and its method, in which, the system is composed of three nodes and CAN bus, its detection method includes: starting up the detection system, initializing the nodes, setting message priority of each node, configuring control field and data field of each node, pressing the 'start and transmission' button of node 1, 2 and 3 orderly, pressing the' stop transmitting' button of node 1, collecting MAC frame to be displayed by a display unit, which not only finishes generation of the CAN message priority, but also realizes detection of the priority and monitor to MAC frame.

Description

technical field [0001] The invention relates to a CAN message priority generation and detection system and method thereof. Background technique [0002] Fieldbus technology has been increasingly used in industrial sites. CAN bus has been more and more widely used because of its unique advantages such as high efficiency, low price and high reliability. Message priority is a significant feature of the CAN bus. However, at present, there is a lack of in-depth research and analysis on the priority of CAN messages in China, and there has been no effective method or means to generate and detect the priority of messages. This hinders the further research and application of CAN bus to a great extent. Contents of the invention [0003] In order to solve the problem that CAN message priority cannot be detected at present, the invention provides a CAN message priority generation and detection system and method thereof. [0004] CAN message priority generation and detection system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/40H04L12/26
Inventor 佟为明林景波刘勇李凤阁金显吉高洪伟
Owner HARBIN INST OF TECH
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