General multiple serial port communication protocol detection and identification method

Abstract

The invention discloses a general multiple serial port communication protocol detection and identification method, and relates to the digital communication field. The method comprises the following steps: writing n serial port communication protocols into an ins configuration file; reading bytes in a serial port reception buffer area to an annular buffer area; detecting a front-most data frame start address in the annular buffer area; judging whether the number of detected data frames meeting a communication protocol is not 0, and if so, copying the content of the detected data frames to a target array, carrying out analysis and deleting the detected data frames from the valid data in the annular buffer area; judging whether the length of the valid data in the annular buffer area is larger than or equal to frame length maxprolen of the communication protocol, the frame length of which is the longest, and if so, keeping the newly-written maxprolen-1 bytes in the valid data in the annular buffer area and deleting other bytes; or otherwise, reading quit identification, and if the quit identification is effective, quitting the method. The method can detect, identify and analyze all of the data frames meeting the communication protocol under the condition of having various abnormities.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to a method for detecting and identifying various serial port communication protocols of various electrical components in various missile weapon systems and industrial control systems. Background technique [0002] Serial communication, such as RS-232, RS-422, RS-485, as a digital communication method with high stability and convenient construction, is most widely used in missile weapon systems and industrial control systems. The data frame of the communication protocol is used to complete a specific function or to monitor the status of other components. [0003] The information interaction between the electrical components in the missile weapon system is intricate, and the communication protocols are often quite different. At present, the common method for detecting and identifying different communication protocols is to write specific communication protocols in the software c...

AI Technical Summary

Problems solved by technology

[0007] In the above two cases, the usual detection and identification algorithms will mistake these bytes for the real frame header and then delete a few useful bytes, resulting in frame loss, unable to perform the required action or fail to monitor the key state , may cause system failure

Images