Asynchronous serial communication method and system

Abstract

The invention discloses an asynchronous serial communication method. The asynchronous serial communication method comprises the following steps: obtaining a target baud rate, and generating a baud rate clock signal according to the target baud rate; performing scrambling processing on target sending data in bytes, and successively obtaining a scrambling code corresponding to each byte at the trigger of the baud rate clock signal; calculating the odd-even check result of each byte; outputting a completed data frame consisting of a frame header and valid data frames; obtaining the target baud rate according to the jump frequency of the frame header while the frame header is received; and recovering the valid data frames according to the target baud rate. The frame header is added at the front of the valid data frames, and the frame header is triggered by the baud rate clock signal, therefore, while a receiver receives the frame header, the baud rate used by a sender is obtained through the bit jump information of the frame header. Furthermore, the security of communication is further ensured by means of the scrambling processing. The probability that communication contents are eavesdropped is reduced by means of the asynchronous serial communication method. The invention also discloses an asynchronous serial communication system, and the effect is realized as mentioned above.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an asynchronous serial communication method and system. Background technique [0002] In the current asynchronous serial communication system, the sender and the receiver complete the serial transmission and data recovery of frame data in units of bytes according to the agreed communication baud rate (hereinafter referred to as baud rate). Since the encoding method of asynchronous serial communication is relatively simple, the data content of both communication parties is easy to be deciphered when the baud rate is fixed, and the confidentiality is poor. [0003] It can be seen that how to reduce the probability of communication content being eavesdropped due to interception of serial communication data is an urgent problem to be solved by those skilled in the art. Contents of the invention [0004] The purpose of the present invention is to provide an asynchronous seria...

AI Technical Summary

Problems solved by technology

Since the encoding method of asynchronous serial communication is relatively simple, when the baud rate is fixed, the data content of the communication parties is easy to be cracked, and the confidentiality is poor

Images