A mobile terminal-based keyboard input detection method and detection system

Abstract

The invention discloses a detection method and a detection system for keyboard input based on a mobile terminal. The method comprises the following steps of pre-defining a unique key code corresponding to each key on a keyboard, and storing; enabling the keyboard to output the key code of each key inputted by the user through an output pin, and enabling the keyboard to send the key code of each pressed key through the output pin when one or a plurality of keys are simultaneously pressed on the keyboard; enabling a central processor of the mobile terminal to obtain the key code of each key sent by the keyboard by detecting the changes of high level and low level change of a GPIO (general purpose input output) pin, identifying the key code of each key, obtaining the input content of the keyboard, outputting and displaying. The method has the advantage that the keys of the self keyboard can be encoded by the mobile terminal, each code is transmitted and identified, and a plurality of keys can be connected by only one GPIO pin, so number of GPIO pins used by the keyboard is reduced, and the utilization efficiency of the GPIO pins of the central processor is improved.

Description

technical field [0001] The invention relates to the technical field of mobile terminals, in particular to a mobile terminal-based keyboard input detection method and detection system. Background technique [0002] With the development of mobile communication technology and the continuous improvement of people's living standards, the use of various mobile terminals such as mobile phones has become more and more popular, and mobile phones have become an indispensable communication tool in people's lives. [0003] Buttons are one of the main input methods of mobile terminals. In the prior art, multiple GPIO pins of the CPU (Central Processing Unit, central processing unit) are often needed to connect the main board of the mobile terminal to the keyboard; especially full-keyboard mobile phones However, due to the large number of keys in a full-keyboard mobile phone, more than ten GPIO pins that need to occupy the CPU are often required. However, the number of GPIOs on the CPU i...

AI Technical Summary

Problems solved by technology

However, the number of GPIOs on the CPU is limited, and it is often difficult to use. Therefore, a solution is urgently needed to reduce the number of GPIOs used by the keyboard, thereby improving the utilization efficiency of GPIO pins.

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