Method for simulating PS2 interface through GPIO port of single-chip microcomputer, single-chip microcomputer and system

Abstract

The invention provides a method for simulating a PS2 interface through a GPIO port of a single-chip microcomputer, the single-chip microcomputer and a system, and belongs to the field of communication. The method for simulating the PS2 interface through the GPIO port of the single-chip microcomputer comprises the following steps that two GPIO ports used for configuring and simulating the PS2 interface are selected and configured; an interrupt processing module of the single chip microcomputer judges whether the PS2 CLK pin is interrupted or not, if not, monitoring continues, and if yes, the next step is executed, and an interrupt service program is entered; the interrupt service program clears an interrupt flag bit, and then calls a receiving and analyzing program to receive and analyze PS2 DATA pin data; and after a complete data is received, quitting the interrupt service program, and continuing monitoring. The invention also provides a single-chip microcomputer and a system for realizing the method. The method has the beneficial effects that the function of the hardware PS2 interface is realized by a pure software method, and the cost is low.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method for simulating a PS2 interface at a GPIO port of a single-chip microcomputer, and also relates to a single-chip microcomputer for realizing the method and a system including the single-chip microcomputer. Background technique [0002] As the voice of localization is getting higher and higher, the domestic plan will replace the foreign computers of government agencies and institutions with domestic computers within 3 years. Localization of key chips in office computers must be localized. At present, domestic general-purpose desktop CPUs and embedded chips have been laid out. The gap between the performance of chips such as Loongson and Phytium and Intel's chips is getting smaller and smaller, which can meet the needs of daily office work. no problem. In addition, the EC chips in notebooks are now mainly controlled by manufacturers such as ITE (Lianyang) and Holtek (Heta...

AI Technical Summary

Problems solved by technology

In addition, the EC chips in notebooks are now mainly controlled by manufacturers such as ITE (Lianyang) and Holtek (Hetai), so domestic single-chip microcomputers should be used to replace these single-chip microcomputers, but the peripherals on notebooks currently use more PS2 interfaces ( Such as keyboards, touchpads, etc.), domestic single-chip microcomputers generally do not have PS2 interfaces, so there is an urgent need for a solution that uses the IO ports of ordinary single-chip microcomputers to simulate PS2 interfaces.

Images