Data filtering and interaction method based on automobile CAN bus

Abstract

The invention relates to a data filtering and interaction method based on an automobile CAN bus. The data filtering and interaction method based on the automobile CAN bus comprises a CAN data filtering process and a CAN data interaction process; and the CAN data filtering process comprises the steps of: setting all filter tanks to an available state at first, and then, obtaining an available tankas a CAN data filtering tank; obtaining automobile CAN bus data, judging whether the data is successfully obtained or not, if so, executing the next step, and otherwise, ending; judging whether the tank is a distributed available tank or not, if so, executing the next step, and otherwise, ending; judging whether an ID is an effective ID or not, if so, executing the next step, and otherwise, ending; and writing the data in the obtained available tank to be cached. By means of the data filtering and interaction method based on the automobile CAN bus disclosed by the invention, the real-time working performance of a CAN node is improved; the problem that system resources and the processing time are wasted due to the fact that an upper-level system receives useless information can be avoided;simultaneously, mutual communication between a product and the automobile CAN bus is realized; and thus, practical application requirements can be well satisfied.

Description

technical field [0001] The invention relates to a data filtering and interaction method based on the automobile CAN bus. Background technique [0002] CAN is the abbreviation of Controller Area Network (CAN). It was developed by German BOSCH company, which is famous for R&D and production of automotive electronic products, and eventually became an international standard (ISO 11898). It is the most widely used in the world. One of the fieldbus. Compared with other field buses, CAN bus is a field bus that has formed an international standard and has many characteristics such as high communication speed, easy implementation, and high cost performance. These are also important reasons why the CAN bus is used in many fields and has strong market competitiveness. Communication rate up to 1Mbps. [0003] With the rapid development of computer hardware, software technology and integrated circuit technology, the CAN bus protocol has become a standard bus for automotive computer co...

AI Technical Summary

Problems solved by technology

In many industrial applications, such as the automotive industry and distributed measurement and control systems, due to the large number of CAN nodes, each node needs to receive more information, which increases the workload of software debugging. Configuration errors will cause the CAN controller to receive incorrect information. The required information increases the workload of the upper system software and reduces work efficiency

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