CN206224390U

CN206224390U - A kind of keyboard special based on PS/2 interfaces

Info

Publication number: CN206224390U
Application number: CN201620955552.2U
Authority: CN
Inventors: 张德新; 林文波
Original assignee: Tianjin Embedtec Co Ltd
Current assignee: Tianjin Embedtec Co Ltd
Priority date: 2016-08-26
Filing date: 2016-08-26
Publication date: 2017-06-06
Anticipated expiration: 2026-08-26

Abstract

The utility model is related to art of keypads, a kind of especially keyboard special based on PS/2 interfaces, including serial communication module, protocol process module and PS/2 keyboard interface circuit modules；The serial communication module is electrically connected with protocol process module and PS/2 keyboard interface circuit modules successively；The serial communication module includes that 3 line RS232 standard serial ports modules and USB turn serial port module, and the 3 line RS232 standard serial ports module and USB turn serial port module and electrically connected with protocol process module respectively；The protocol process module includes serial ports controller module and PS/2 keypad protocol generation modules, PS/2 keypad protocols generation module electrical connection PS/2 keyboard interface circuit modules；The utility model can save human cost, hence it is evident that improve the efficiency of volume production mainboard self-test.

Description

A kind of keyboard special based on PS/2 interfaces

Technical field

The utility model is related to art of keypads, especially a kind of keyboard special based on PS/2 interfaces.

Background technology

Current many industrial control mainboards also largely support PS/2 interfaces, and traditional test PS/2 interfaces are set by installing PS/2 It is standby, if PS/2 equipment explanation PS/2 interfaces working properly are normal.Belong to human-computer interaction device at a slow speed because of PS/2 equipment, it is necessary to Go to manipulate PS/2 equipment by people.When industrial control mainboard is largely produced, very big challenge is carried out to the volume production calibration tape of producer.In order to carry The efficiency of volume production test high is typically realized using automated test device, but is surveyed for human-computer interaction device's automation difficult to realize Examination.

The content of the invention

In order to overcome the technical deficiency of existing keyboard, the utility model provides a kind of dedicated key based on PS/2 interfaces Disk, can save human cost, hence it is evident that improve the efficiency of volume production mainboard self-test.

The utility model solves the technical scheme that its technical problem used：A kind of dedicated key based on PS/2 interfaces Disk, including serial communication module, protocol process module and PS/2 keyboard interface circuit modules；The serial communication module successively with Protocol process module and PS/2 keyboard interface circuits module are electrically connected；The serial communication module includes 3 line RS232 standard serial ports Module and USB turn serial port module, the 3 line RS232 standard serial ports module and USB turn serial port module respectively with protocol process module Electrical connection；The protocol process module includes serial ports controller module and PS/2 keypad protocol generation modules, PS/2 keypad protocols Generation module electrically connects PS/2 keyboard interface circuit modules.

That the 3 line RS232 standard serial ports module is selected is the ADM202EARN of AD companies.

The USB turns the CH340G of the Nanjing Qin Heng companies of serial port module selection.

What the protocol process module was selected is the Atmega128 chips of AVR companies.

The beneficial effects of the utility model are that a kind of keyboard special based on PS/2 interfaces is gone by programme-control keyboard Manipulation corresponding program, can avoid causing final test effect deviation due to human factor；Avoid what man-machine interaction environment was brought The unnecessary time wastes, hence it is evident that shortens the testing time, improves efficiency and reliability.

Brief description of the drawings

The utility model is further illustrated with reference to the accompanying drawings and examples.

Fig. 1 is fundamental diagram of the present utility model.

1. serial communication module in figure, 2. protocol process module, 3.PS/2 keyboard interface circuit modules, 4.3 line RS232 marks Quasi- serial port module, 5.USB turns serial port module, 6. serial ports controller module, 7.PS/2 keypad protocol generation modules.

Specific embodiment

Referring to the drawings, a kind of keyboard special based on PS/2 interfaces, including serial communication module 1, the and of protocol process module 2 PS/2 keyboard interface circuits module 3；The serial communication module 1 successively with protocol process module 2 and PS/2 keyboard interface circuits Module 3 is electrically connected；The serial communication module 1 includes that 3 line RS232 standard serial ports modules 4 and USB turn serial port module 5, described 3 Line RS232 standard serial ports module 4 and USB turn serial port module 5 and are electrically connected with protocol process module 2 respectively；The protocol processes mould Block 2 includes serial ports controller module 6 and PS/2 keypad protocols generation module 7, the electrical connection of PS/2 keypad protocols generation module 7 PS/2 Keyboard interface circuit module 3.

That the 3 line RS232 standard serial ports module 4 is selected is the ADM202EARN of AD companies, 3 line RS232 standard serial ports Module 4 is electrically connected with protocol process module 2, realizes the conversion of RS232 level and Transistor-Transistor Logic level.

The USB turns the CH340G of the Nanjing Qin Heng companies of the selection of serial port module 5, realizes that USB turns serial ports.

What the protocol process module 2 was selected is the Atmega128 chips of AVR companies, there is provided serial ports is grasped from external reception Order, then according to PS/2 keypad protocols, is converted to PS/2 keypad protocol frames by controlled keyboard order, and tested main frame is dealt into good time On, realize input character or selection corresponding program.

The PS/2 keyboard interface circuits module 3 be responsible for provide open collector pin, for and tested mainboard PS/ 2 keyboard interfaces are connected.

The course of work of the present utility model is：Electricity on mainboard, at the beginning of keyboard special sequentially enters initialization keyboard stage, BIOS Stage beginning and operating system initialization stage.After smoothly completing, host-initiated enters system desktop, and keyboard is recognized by system, Can now say the word to operate the keyboard on tested main frame to keyboard special by PC or notebook computer, run general answering Use program.

Claims

1. a kind of keyboard special based on PS/2 interfaces, it is characterized in that：Including serial communication module, protocol process module and PS/2 Keyboard interface circuit module；The serial communication module is electrically connected with protocol process module and PS/2 keyboard interface circuit modules successively Connect；The serial communication module includes that 3 line RS232 standard serial ports modules and USB turn serial port module, the 3 line RS232 standard strings Mouth mold block and USB turn serial port module and are electrically connected with protocol process module respectively；The protocol process module includes serial ports controller Module and PS/2 keypad protocol generation modules, PS/2 keypad protocols generation module electrical connection PS/2 keyboard interface circuit modules.

2. the keyboard special based on PS/2 interfaces according to claim 1, it is characterized in that：The 3 line RS232 standard serial ports That module is selected is the ADM202EARN of AD companies.

3. the keyboard special based on PS/2 interfaces according to claim 1, it is characterized in that：The USB turns serial port module choosing The CH340G of Nanjing Qin Heng companies.

4. the keyboard special based on PS/2 interfaces according to claim 1, it is characterized in that：The protocol process module is selected Be AVR companies Atmega128 chips.