A kind of aux signal testing system and method

Abstract

The invention discloses an AUX signal testing system and a method. The system comprises a signal receiving unit, a signal acquisition unit and a signal transmission unit, wherein the three units are sequentially connected. The signal receiving unit is used for eliminating the clutter of a detected signal and amplifying the detected signal. The signal acquisition unit is used for conducting the differential-to-single-ended treatment on the processed signal and then sampling the single-ended signal according to a superstratum-set sampling frequency until sampled data reach a preset sampling depth. The signal transmission unit is used for sending the sampled data to an external host computer. The host computer conducts the waveform drawing and the data analysis according to the received sampled data. The AUX signal testing method is conducted based on the above device. According to the method, data are sampled according to a preset sampling frequency and signals meeting a triggering condition are triggered to be distributed to a signal storage unit till meeting the preset sampling depth. Meanwhile, an external PC extracts data stored in the signal storage unit to conduct the waveform drawing and the data analysis on the data. After that, analyzed data are reduced to a signal waveform at another place. Therefore, the system and the method are high in efficiency and are applicable to the working mode of the collaborative test development at two places.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and more specifically relates to an AUX signal testing system and method. Background technique [0002] At present, DP (DisplayPort, a high-definition digital display interface standard) point-screen technology is very mature. When DP points-screen, it needs to use AUX signal (auxiliary channel signal) for communication, and the success of communication is directly related to whether the point-screen can Successful; the AUX signal can also be used to read and write Extended Display Identification Data (EDID). Whether the communication of the AUX signal is normal or not is related to the correctness of EDID reading and writing. [0003] When the DP screen cannot be normally lit, or the value read and written by EDID does not match the actual value, it is necessary to test the AUX signal to find the cause of the fault; the traditional method is to use an oscilloscope to manually test the ...

AI Technical Summary

Problems solved by technology

[0006] (3) For the stored waveform pictures, it is necessary to manually decode the AUX signal according to the AUX protocol, convert it into a hexadecimal value and compare it with the actual value. Due to the large amount of data, the manual decoding efficiency is low and error-prone

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