Method, device and system for realizing online pressure test of serial bus

Abstract

The invention discloses a method, a device and a system for realizing an online pressure test of a serial bus. The method comprises the steps: enabling main equipment to be connected with a storage device through a serial bus; writing test data into the storage device; rapidly reading the test data from the storage device for N times, and recording a reading result in a first file; calculating a cyclic redundancy check value of the reading result, determining a reference value, and taking the reading result corresponding to the reference value as a reference reading result; judging whether thecyclic redundancy check value of any other reading result is the same as the reference value or not, and storing different reading results in a second file if the cyclic redundancy check value of anyother reading result is different from the reference value; counting different times n; reading the reading results stored in the second file, comparing the reading results with a reference reading result, obtaining the difference degree d between each different reading result and the reference reading result, and calculating the average difference degree D; and judging the reliability of the serial bus according to the nN and the average difference degree D.

Description

technical field [0001] The invention relates to the field of serial bus testing, in particular to a method, device and system for realizing online stress testing of a serial bus. Background technique [0002] With the development of information technology, products are becoming more and more complex, and more and more hardware needs to be managed. Because the I2C protocol is simple, the cost of hardware design and device cost is low, and the I2C bus and devices are widely used for machine management, so it is guaranteed Production testability and reliability are becoming more and more important. [0003] The traditional I2C bus test method is to use an oscilloscope to measure the signal waveform output by the I2C bus during the research and development stage, and then compare the data carried by the measured waveform with the preset parameters, so as to judge whether the signal transmitted on the I2C bus meets the specification. Some R&D personnel will use the oscilloscope ...

AI Technical Summary

Problems solved by technology

During mass production and shipment, due to the complex and time-consuming methods of oscilloscope programming, continuous reading and writing, and eye pattern template testing, after mass production, only sampling inspections can be performed, and oscilloscopes will not be used to test all produced products, resulting in batch processing. Quality defects can not effectively test the interception

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