Data frame header sending method and sending device

Abstract

The invention discloses a data frame header sending method and a sending device. A transmission parameter acquisition method includes: acquiring N waveform sequences corresponding to a preset data frame header, wherein each waveform sequence is respectively one of the following: a first waveform sequence, a second waveform sequence, and a third waveform sequence, and all the waveform sequences have the following waveform sequence characteristics: transmission duration of all the waveform sequences is the same and inversely proportional to baud rates, the first waveform sequence starts and is with a high level for a preset time, then jumps to a low level and ends with the high Level, and total duration occupied by the low level does not vary with the baud rates, the second waveform sequence continues to be with the high level, and the third waveform sequence starts with the low level and ends with the high level, and total duration occupied by the low level does not vary with the baud rates; obtaining X times of level jumping in the N waveform sequences according to the characteristics of all the waveform sequences, wherein all the X times of level jumping are jumping from the high level to the low level; and controlling a level of a sending port to carry out level varying according to the X times of level jumping to send the data frame header.

Description

technical field [0001] The present invention relates to the field of electronic technology, in particular to a data frame header sending method and sending device. Background technique [0002] The serial communication method between electronic devices is usually transmitted character by character, each character is transmitted one by one, and when transmitting a character, it always starts with a "start bit" and ends with a "stop bit" , there is no fixed time interval requirement between characters. When two electronic devices communicate, the sending clock of the sending end and the receiving clock of the receiving end may be different. When the frequency difference between the sending clock and the receiving clock is too large, it will cause sampling misalignment at the receiving end, resulting in receiving errors and lower communication efficiency. [0003] In addition, when only two wires are used for communication between electronic devices, power supply / charging is u...

AI Technical Summary

Problems solved by technology

When two electronic devices communicate, the sending clock at the sending end and the receiving clock at the receiving end may be different. When the frequency difference between the sending clock and the receiving clock is too large, it will cause sampling misalignment at the receiving end, resulting in receiving errors and lower communication efficiency.

[0003] In addition, when only two wires are used for communication between electronic devices, power supply / charging is usually not possible during the communication process, and other external power sources are required, which brings great inconvenience to the use of electronic devices. Therefore, There is an urgent need in the art for a method of power supply / charging when only two wires are used for communication

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