Communication information monitoring device, method and system for auxiliary channel of DP interface

Abstract

The invention provides a communication information monitoring device, method and system for DP interface auxiliary channels, information acquisition ports with the same number as DP interfaces of a to-be-debugged device on the monitoring device are connected with the DP interface auxiliary channels of the to-be-debugged device in a one-to-one correspondence manner, and an information acquisition unit is used for acquiring monitored communication information and transmitting the communication information to the to-be-debugged device. And the information processing unit identifies corresponding acquisition timestamps for the communication information acquired by each information acquisition unit according to the clock unit, and sends the acquisition timestamps to the information analysis and debugging equipment. According to the invention, the acquisition timestamps of the communication information on different DP interface auxiliary channels are identified according to the same clock unit, so that the acquisition timestamps identified on the communication information do not have time errors; the communication information on the auxiliary channels of the different DP interfaces can be associated by directly using the acquisition timestamps, so that the analysis difficulty is reduced, and the error of a debugging result is reduced.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of information monitoring, and in particular to a communication information monitoring device, method and system for an auxiliary channel of a DP interface. Background technique [0002] DP interface (DisplayPort) is a high-definition digital display interface standard, adopts DP transmission protocol, and is widely used in the connection of audio and video equipment such as computer monitors and TVs. The signal channels of the DP interface include the main signal channel (MainLink) and the auxiliary channel (AUX Channel1). Among them, the main signal channel is composed of 1 to 4 pairs of unidirectional high-speed differential lines, mainly used to transmit high-speed video and audio data; the auxiliary channel is composed of 1 pair of bidirectional differential lines, mainly used to transmit link control signals. When developing devices supporting the DP standard, it is often nec...

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Problems solved by technology

[0004] However, if the device to be developed includes multiple DP interfaces, at present, it is only possible to monitor the communication information of each DP interface auxiliary channel through one-to-one corresponding multiple DP interface auxiliary channel monitors

However, when equipment developers use the communication information monitored by multiple DP interface auxiliary channel monitors for analysis, it is difficult to correlate the communication information on different DP interface auxiliary channels, which not only increases the difficulty of analysis, but also reduces the The communication information on the auxiliary channels of different DP interfaces is artificially correlated for device debugging, and the error of the debugging results will be large.

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