Test method and test system of vehicle control unit

Abstract

The invention provides a test method and a test system of a vehicle control unit. The method comprises the following steps of: acquiring a storage file of a CAN message; analyzing the storage file of the CAN message, and obtaining a value interval of an intermediate layer interface variable of the vehicle control unit; taking a value in the value interval of the intermediate layer interface variable of the vehicle control unit, and forming a CAN message data according to the value taking result; transmitting the CAN message data, and acquiring data of the intermediate layer interface variable of the vehicle control unit; comparing the CAN message data with the data of the intermediate layer interface variable of the vehicle control unit; and judging whether the data of the intermediate layer interface variable of the vehicle control unit has receiving and analysis errors according to the comparison result. The method provided by the invention can perform automatic test of big data coverage for the interface variable, and can improve efficiency and reliability of testing the intermediate layer interface variable.

Description

technical field [0001] The invention relates to the technical field of vehicle testing, in particular to a testing method and system for a vehicle controller. Background technique [0002] At present, the vehicle controller software architecture is divided into three layers: policy layer, middle layer and driver layer, in order to realize parallel layered development. Among them, the middle layer is responsible for the interaction between various modules, and the middle layer realizes a large amount of CAN data reception, analysis, packaging and sending through interface variables. At present, the testing of interface variables in the middle layer is mainly carried out manually one by one. For output interface variables, the value of the interface variable needs to be modified through the CAN test frame, and then compared with the sent CAN message information; for input interface variables, It is necessary to modify the interface variable value through the CAN message to be...

AI Technical Summary

Problems solved by technology

In this way, on average, each project needs to complete the manual testing of 1,000 CAN message interfaces. It is time-consuming and labor-intensive to complete the work, and it is necessary to continuously modify the CAN test frame code, and the workload is too complicated.

However, if such a complicated work is done manually, various types of errors will inevitably occur, and it is not easy to check and check, and the data covered by the test is not enough, resulting in unreliable test results

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