LIN communication fault injection method and system and storage medium

Abstract

The invention discloses an LIN communication fault injection method and system and a computer readable storage medium, the method is applied to an LIN communication fault injection device, and the method comprises the following steps: when the LIN communication fault injection device receives a message which is sent by an LIN host and takes a main node as a signal release node, sending the message to the LIN host; storing the message in a first buffer area; modifying the message in the first buffer area according to a pre-configured fault injection rule; and sending the modified message to the LIN slave. Compared with the prior art, the accuracy of LIN communication fault testing is improved.

Description

technical field [0001] The invention relates to the technical field of LIN communication fault testing, in particular to a LIN communication fault injection method, system and storage medium. Background technique [0002] LIN communication is a serial communication network, which is used to realize the distributed electronic system control in the car and provide auxiliary functions for the existing car network. In situations where the bandwidth and multi-function of the CAN bus are not needed, the use of the LIN bus can greatly save costs. In order to ensure the accuracy of LIN communication information between the master and slave of the car controller, it needs to be verified in the early stage of design. The verification based on the LIN communication function is completed in the test phase. During the test, it is necessary to traverse all possible signal combinations. Since it is difficult to trigger signal messages in abnormal mode in normal mode, it is necessary to m...

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Problems solved by technology

[0003] Artificially changing the physical state to change the message can only change some simple mechanical states. For some faults that are difficult to reproduce or change, it takes a long time to prepare, and even cannot be changed: if some states cannot be reproduced, they cannot be tested. As a result, some test functions cannot be covered; only some test cases that can be artificially interfered with are tested; in the normal working state during the test process, there is a risk of destroying the slave by using artificial mechanical interference; Risk of harming testers; functions that cannot be tested cannot guarantee the accuracy of related codes. If this problem occurs, there is an unknown risk

[0004] At present, there is still a device that can be used as a master or a slave separately. At this time, the master and slave cannot be tested at the same time. The conventional communication needs to be tested separately, and the test time is greatly increased.

Because the integrity of the system is destroyed during the test, it is difficult to fully simulate the actual physical signal for the test LIN device, resulting in insufficient test coverage and inaccurate testing

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