A method for a single-chip microcomputer to identify a key pressing operation

Abstract

The invention relates to the technical field of key detection, and particularly discloses a method for a single-chip microcomputer to identify a key pressing operation, which comprises the following steps of S1, counting a second preset time period comprising a third preset time period after detecting that the key pressing time delay is delayed for a first preset time period for the first time; S2, judging whether a key pressing operation mark exists in the second preset time period or not, and if yes, judging that the key executes the corresponding key pressing operation. According to the invention, one IO port of the single-chip microcomputer is connected with the button, the single click, double click, multiple click, long press and other operations of the identification button are carried out, and only one pin of the single-chip microcomputer is needed to realize multifunctional identification of one button, so that the use resource is less, and the cost is saved. According to themethod, delay jitter elimination processing is firstly carried out by adopting a flag bit detection method, the program running time is not occupied, the waiting time is shortened compared with that of a traditional method, the detection time of each key is not influenced and is not influenced mutually even if more keys need to be detected, the real-time performance is high, and the recognition speed is high.

Description

technical field [0001] The invention relates to the technical field of button detection, in particular to a method for a single-chip microcomputer to identify button pressing operations. Background technique [0002] Simplicity is one of the elements pursued by modern people, and a simple but functional product is more popular. Arrange fewer buttons on the control panel, and use one button on the handle of the handheld product to control different functions, without moving fingers to press different buttons to control different functions, which is convenient for users to use. Buttons can distinguish different functions by judging single-click, double-click, multi-click, and long-press. The traditional method is to set different buttons to distinguish different functions. This method is not only not simple enough, but additional pins of the microcontroller are needed, and the hardware cost will also increase. [0003] The traditional button debounce method is to detect tha...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for single-chip microcomputer to identify button press operation, and the technical problem to be solved is: the traditional method of setting different buttons to distinguish different functions is not concise enough, and additional single-chip microcomputer pins are needed, and the hardware cost will also increase; And, the traditional button debounce method adopts the delay delay function, which takes up system time and affects the real-time performance of the system

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