Method for connecting PS/2 keyboard with portable terminal and portable terminal

Abstract

The invention discloses a method for connecting a PS / 2 keyboard with a portable terminal. The method includes the following steps that a processor of the portable terminal initializes the PS / 2 keyboard; a universal asynchronous receiver / transmitter (UART) interface of the portable terminal receives keyboard data sent by the PS / 2 keyboard through a receiving URX terminal of the UART interface, wherein the UART interface of the portable terminal is connected with a PS / 2 interface of the PS / 2 keyboard. A UTX terminal and the URX terminal are connected with a clock signal terminal and a data transceiving terminal of the PS / 2 interface respectively.

Description

technical field [0001] The present invention relates to a method for connecting a PS / 2 keyboard to a portable terminal, more specifically, to a method for connecting a PS / 2 keyboard through multiplexing and a portable terminal using the method. Background technique [0002] Generally speaking, "portable terminal" refers to a device that can be carried by the user and can provide the user with various functions such as calling, sending and receiving messages, schedule management, games, audio / video reproduction, etc., such as mobile phones, tablet computers, personal Digital assistant (PDA), digital multimedia player, etc. With the development of electronics and communication technologies, people hope that portable terminals can be compatible with keyboards, so that users can perform text input and other operations, such as game operations. [0003] Currently, commonly used keyboards connected to portable terminals include Universal Serial Bus (USB) keyboards (hereinafter re...

AI Technical Summary

Problems solved by technology

[0004] For the support of USB keyboards and Bluetooth keyboards, the requirements for portable terminal software and hardware systems and R&D personnel are relatively high, the R&D cycle is long, and the cost is relatively high.

[0005] In addition, limited by the size of the portable terminal, there is only one USB interface on the portable terminal, and resources are very limited

If a USB interface is added, the implementation of the software and hardware of the portable terminal will become much more complicated, adding a very large overhead

Mainly manifested in the following two aspects: 1) If the portable terminal has two USB controllers, then in terms of software, it is necessary to realize the control of the two USB controllers. Compared with the simple universal serial asynchronous transmission and reception (UART) application, Implementing USB applications is much more complicated, and increases hardware costs; 2) If the portable terminal has only one USB controller, it needs to implement functions similar to USB HUB through software, and the software implementation will become very complicated

[0006] Therefore, as mentioned above, current portable terminals cannot support conventional PS / 2 keyboards

[0007] In addition, for simple keyboard applications, whether using a USB keyboard or a Bluetooth keyboard, the overhead of hardware and software is relatively large.

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