Serial communication baud rate identification method, device, microcontroller and system

Abstract

The invention provides a serial communication baud rate identification method and device, a microcontroller and a system. The method comprises the steps of acquiring pulse width data which comprise eight pulse width time values, determining whether the pulse width data meet a first preset condition, determining the largest pulse width time value and the smallest pulse width time value from the pulse width data when the pulse width data meet the first preset condition, calculating the average pulse width time value of pulse width time values except the largest pulse width time value and the smallest pulse width time value, determining whether the pulse width data meet a second preset condition based on the average pulse width time value, and determining the serial communication baud rate through the average pulse width time value when the pulse width data meet the second preset condition. The serial communication baud rate identification method and device, the microcontroller and the system can solve the problem of baud rate error calculation caused by interference and can improve the reliability of serial communication.

Description

technical field [0001] The invention relates to the technical field of serial communication, in particular to a serial communication baud rate identification method, device, microcontroller and system. Background technique [0002] For serial communication, the correct transmission and reception of data can only be realized when the baud rate of both parties in communication is the same. And some systems always hope to achieve compatibility with various baud rates. The usual implementation method is to require the other party to send the specified characters or data first, and after the system receives the characters and data, calculate the baud rate of the other party to work with the baud rate of the other party. [0003] The inventor found in the process of realizing the invention that: most of the adaptive baud rate identification methods currently used are the calculation method of calculating the average value after measuring the pulse width. However, there is a risk ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a serial communication baud rate identification method and device to solve the risk of the adaptive baud rate identification method used in the prior art. When the data is disturbed, it will The technical solution for the problem that leads to calculation errors and data communication failures is as follows:

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