Upper computer control-based CAN bus communication system and method

Abstract

The invention discloses an upper computer control-based CAN bus communication system and method. The system comprises a controller, a ZLG-USBCAN2, a CANSressDR and a CANScope. The method comprises steps: 1, a producer/consumer circular data structure is adopted; 2, a queue mode is adopted for operation between cycles; 3, parsing and filtering of a receiving message ID are recognized; 4, single-frame messages in PDU1 and PDU2 formats are put in the queue; 5, dialog and broadcast multi-frame messages with a data field greater than 8 bytes are synthesized and recombined according to a J1939 protocol to be put in the queue; 6, message frames of other data are discarded; 7, parsing and packaging of a sending message ID are recognized; 8, the message is parsed to determine a frame type state variable; 9, a single-frame sending message is directly put in the queue; 11, after packing, packaging and clustering, putting in the queue is carried out; and 11, after processing J1939 sending messagecluster decomposition, getting out of the queue and writing to a CAN port are carried out. The system and the method disclosed in the invention have the superior effects that the upper computer control software is used to replace the traditional Vector CANoe module, the purchase and maintenance cost is saved, the practicability is increased, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of new energy pure electric vehicles, and in particular relates to a CAN bus communication system and method based on upper computer control. Background technique [0002] With the development of society, new energy electric vehicles will become the inevitable trend of modern and future automobile development. The disadvantages of the traditional point-to-point wiring harness are becoming more and more obvious. According to statistics, in recent years, the electronic devices used in civil vehicles have increased at a rate of 12% per year, and with the popularity of new energy vehicles such as hybrid electric vehicles and pure electric vehicles, the use of electronic devices in automobiles has also begun to show a blowout. momentum. New energy vehicles are becoming more and more electronic and intelligent, and people have higher requirements for economy, safety and handling. The patent whose publication nu...

AI Technical Summary

Problems solved by technology

At present, most CAN bus communication systems use the expensive Vector CANoe module

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