A system and method for parsing messages through CAN bus and its function access method

A CAN bus and analytical function technology, which is applied in the field of obtaining vehicle status information to reduce the risk of analytical errors and improve analytical efficiency.
CN107220138BActive Publication Date: 2020-05-12烽鸟出行科技(北京)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
烽鸟出行科技(北京)有限公司
Publication Date
2020-05-12

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Abstract

The invention relates to a CAN bus message parsing system. The system comprises a data interface, a calling module, a parse function module and a signal descriptor variable module, wherein the data interface is used for obtaining frame data of a CAN bus message; the calling module is used for obtaining a message number according to the first four bytes of the obtained bus message data frame, and calling the parse function module; the parse function module is used for loading a parse variable of the signal corresponding to the message number in the signal descriptor variable module according to the message number, parsing the last eight bytes o the bus message date frame to obtain original data, and storing the obtained original data to the signal descriptor variable module; the signal descriptor variable module separately is used for storing variables of the original data of the signals parsed from the bus message data frame according to each signal in the message, and storing the original data of the signals obtained from parsing.
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Description

technical field

[0001] The invention relates to a method for acquiring vehicle state information, in particular to a method and a device for acquiring CAN bus to acquire vehicle information. Background technique

[0002] With the development of electronic technology, traditional vehicles are developing in the direction of intelligence. There are more and more electronic control systems in vehicles, and various sensors all over the body monitor the status information of vehicles in real time and send this information to corresponding control unit.

[0003] These control units on the vehicle body do not work independently, they need to share information as a whole, so there is a problem of information transmission. At present, CAN-BUS, that is, CAN bus technology (controller area network bus technology), is generally used. In this way, each control unit is connected to these two lines, so that this information will be transmitted on the bus system. All the control units conn...

Claims

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