Method and device for generating CAN communication program of vehicle control unit

Abstract

The invention discloses a method and device for generating a CAN communication program of a vehicle control unit. The method comprises the steps of acquiring a dbc file of a CAN protocol, and reading demand information used for generating a code by using keywords in the dbc file; acquiring all communication frames of the vehicle control unit from the demand information, calling a CAN communication frame decoding function to decode all communication frames of the vehicle control unit, and acquiring a CAN communication decoding statement; acquiring the length and identification of a received signal of the vehicle control unit from the CAN communication decoding statement, judging the data type of the received signal according to the length and identification of the received signal; and generating a CAN signal receiving function code by using the length and identification of the received signal and the data type of the received signal. According to the method, the dbc file of the CAN protocol is enabled to be automatically generated into a software code, and the software development efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of CAN communication, in particular to a method and device for generating a CAN communication program of a vehicle controller. Background technique [0002] At present, the vehicle controller is the communication and control center of new energy vehicles, which plays a decision-making role in the operation status of vehicles, and is one of the core components of new energy vehicles. As the communication center of new energy vehicles, the vehicle controller undertakes the task of receiving and sending hundreds of CAN signals, and each signal is an important signal to control the safe operation of the vehicle. When a certain signal is received or sent and processed Any error will cause a great safety hazard to the vehicle. Currently, the reception and transmission of the CAN signal of the controller is generally done by the controller software engineer according to the dbc file of the CAN protocol, and the so...

AI Technical Summary

Problems solved by technology

As the communication center of new energy vehicles, the vehicle controller undertakes the task of receiving and sending hundreds of CAN signals, and each signal is an important signal to control the safe operation of the vehicle. When a certain signal is received or sent and processed Mistakes can cause great safety hazards to the vehicle

Currently, the reception and transmission of the CAN signal of the controller is generally done by the controller software engineer according to the dbc file of the CAN protocol, and the software code is manually written to realize the reception and transmission of the CAN signal. Since the CAN signal volume of the vehicle controller is particularly large, the involved software It is extremely complicated, and it takes a lot of time for software engineers to write software codes, and it is prone to errors. The work efficiency of manually generating codes is very low

[0003] At present, there is no efficient method to directly generate the dbc file of CAN protocol as software source code, so as to improve the efficiency and quality of software development, and ensure the correctness of CAN signal transmission and reception of the controller

Images