Boundary scanning fault injection method based on data reconstruction

Abstract

The invention provides a boundary scanning fault injection method based on data reconstruction. The boundary scanning fault injection method comprises the steps that boundary scanning chains are identified and connection with a fault injection object is established; a fault injection instruction is received and fault instruction data is parsed to identify a fault mode, and the fault instruction data and data on TAP scanning chains of the current fault injection object are cached and processed; fault injection object information is read from a BSDL file to select a fault injection point; faultinjection sequence data is generated and is sent to the fault injection object, injection of different types of faults is achieved, pin states are fed back to a fault injection PC control terminal. Byadopting the method, user-defined establishment of fault injection testing data is achieved, and the problem is solved that a fault injection method based on a hardware circuit affects the quality ofsignal transmission of a chip.

Description

technical field [0001] The invention relates to the technical field of testing fault injection of avionics systems, in particular to a boundary scan fault injection method based on data reconstruction. Background technique [0002] Testability refers to a design characteristic of equipment that can accurately determine its working status in a timely manner and effectively isolate its internal faults. Fault injection, as a test method to test the fault tolerance of system equipment, is an important means to ensure the reliability of equipment verification stage. The test verification of avionics system is mainly to verify the self-protection and recovery capabilities of the system in complex and harsh working environments by injecting different types of faults into the developed equipment. [0003] With the large-scale application of integrated circuit technology, avionics equipment also has a trend of generalization, integration, and modularization, which makes the system m...

AI Technical Summary

Problems solved by technology

However, this high level of integration improves the utilization of resources, but also brings great difficulties to the testability of the system.

Constrained by the technical level of electrical equipment and the highly integrated characteristics of integrated circuits, traditional fault injection methods such as plugging and probes are difficult to implement

At the same time, the interconnection signals between chips in the avionics system often contain a lot of high-speed and high-frequency signals. The fault injection method based on the hardware circuit will affect the quality of the transmitted signal and cannot be applied, and the custom construction of fault injection test data cannot be performed.

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