CN1023731C

CN1023731C - Electronic information exchange servo device

Info

Publication number: CN1023731C
Application number: CN 91105389
Authority: CN
Inventors: 张之治
Original assignee: TONGBUO INFORMATION CO Ltd
Current assignee: TONGBUO INFORMATION CO Ltd
Priority date: 1991-08-07
Filing date: 1991-08-07
Publication date: 1994-02-09
Anticipated expiration: 2006-08-07
Also published as: CN1069355A

Abstract

The present invention relates to an electronic information exchange server used by many people, which mainly comprises a CPU card (1), a multiplex control logic unit (301) with a plurality of groups of output ends, and a serial communication network controller (53) which can be connected with a plurality of keyboards (6), wherein the multiplex control logic unit receives the information of the CPU card and decode the information to control a display card (33) and finally control a display (4); the keyboards are scanned via a keyboard network composed of a remote terminal interface (51), the serial communication network controller and a dual-port memory (54) to obtain input information.

Description

Electronic information exchange servo device

The present invention uses electronic information exchange servomechanism for a kind of many people, constitutes a kind of many people operating structure that is connected many group display equipments and keyboard with a processor card, multiplex's display control logic unit with the keyboard serial communication control.

Now for the public arena, such as the computer screen billboard, the environment of the multi-screen under the computer inquiry in library, screen wall, lastest news, the KTV computer selected songs system and many people operation, in response to reaching many people user demand, promptly need use giant brain or can reach by internetwork connection mode beginning with PC, but well-knownly be, no matter with regard to giant brain or network connectivity mode, its common problem promptly is every screen must arrange in pairs or groups a terminating machine or PC, its relative cost is very high, is not inconsistent economic principle.

Go on the market and also have on the market at this kind multi-screen system, this system promptly is to increase on the shows signal so-called driver so that the reinforcement of signal to be provided, and can make each display only need to be connected with a computer, make each screen can produce same image, but this kind structure is only applicable to use on the computer billboard at most, and can't make each screen do the output of different images.

Also have on the market and improve the aforementioned interface card that can't do different images output, promptly utilize a multiplexer to be connected in its design, make different displays produce the different images signal, reach computer multiplex (MUX) effect by selection mode with many group display equipments, but this kind design only has the demonstration effect, for the multiplex (MUX) aspect of data input, the then relevant design of shortcoming, so, this series products only can be done multi-screen output at most, for many people's inquiries and input environment for use, promptly can't be suitable for, practicality remains to be improved.

Purpose of the present invention is intended to provide at above-mentioned defective that a kind of control and many people that have extensibility use electronic information exchange servomechanism by single central processing unit.

The objective of the invention is to be achieved in the following manner:

These many people use electronic information exchange servomechanism, cooperate a plurality of keyboards, display and corresponding display card to carry out work, and it comprises a CPU card, it is characterized in that this servomechanism further comprises:

Multiplex's steering logic unit, have many groups and be used for the output terminal that links to each other with each display card respectively and one and be used for bus end with CPU card exchange message, this multiplex's steering logic unit makes according to the information from the CPU card and the corresponding display card startup of this information;

A keyboard network has a plurality of terminal units of linking to each other with each keyboard respectively of being used for and is used for bus end with CPU card exchange message by mouth and one, and this keyboard network is to connecting thereon each keyboard wheel scan flow to obtain the input information from each keyboard; And

An internal bus, it is connected with the bus end of CPU card, multiplex's steering logic unit and keyboard network, to be used for the information transmission between this three.

Described keyboard network further comprises:

A communication interface, a serial communication network controller, and dual-port memory device, the serial communication network controller carries out communication contact by communication interface and each terminal unit interface, and the information that is obtained delivered in this memory by a port of dual-port memory device, and the another port of this memory is as the bus end of this keyboard network.

Described multiplex's steering logic unit further comprises:

Link to each other with an internal bus and card number demoder that have a plurality of output terminals, and a plurality of door switch of control bus to the path between each corresponding output end of this logical block that are serially connected with respectively in the internal bus, a plurality of output terminals of described card number demoder are connected with each door switch respectively, to be used for information decoding from the CPU card, and by the output terminal of card number demoder the door switch corresponding with this information opened, the display card that door switch is therewith connected starts.

Terminal unit interface in the described keyboard network and communication interface are the RS-485 standard interface.

Also comprise that link to each other with the card number demoder, as to be used to set this a card number demoder address address selection switch in described multiplex's steering logic unit, to be used for the expansion of this servomechanism.

Further specify structure of the present invention below in conjunction with accompanying drawing, feature and other switch opens start the display card of door switch connection therewith.

Fig. 1 is an input/output structure calcspar of the present invention;

Fig. 2 is a display interface calcspar of the present invention;

Fig. 3 is an action flow chart of the present invention.

As shown in Figure 1, system architecture of the present invention generally is divided into and is positioned at drawing top position central processing department part, the multiplex (MUX) in drawing left side show partly with the keyboard network three of figure right side of face partly, upper half part is with CPU card 1, storage device 15 and system status display 16 constitute, this CPU card 1 comprises the related elements of CPU (central processing unit) work, storage device 15 then comprises read-only memory, reading writing memory, the disk drive storage device ... Deng, system status display 16 then provides and shows its duty, and CPU card 1 shows with aforementioned multiplex (MUX) with internal bus 10 and the keyboard network is connected.

This multiplex (MUX) shows partly the display card 33 and corresponding display 4 that comprises multiplex's steering logic unit 301, is plugged in the 3010 six groups of output end positions in multiplex's steering logic unit, and the keyboard network partly, constitute with RS-485 serial network interface, be connected with RS-485 terminal unit interface 51 respectively with the keyboard 6 corresponding to each display 4 position, each terminal unit interface 51 is connected to RS-485 interface 52, serial communication network controller 53 and dual-port memory device 54 and returns in the CPU card 1.

Aforementioned multiplex (MUX) show partly than concrete structure, can be referring to shown in Figure 2, multiplex's steering logic 301 of Fig. 1 is by bus driver 2, address selection switch 30, card number demoder 3 is formed with door switch 31, this bus driver 2 is connected with the internal bus of four groups of expansion slots 11, and these four groups of expansion slots 11 are one Standard PC/AT slot, can supply grafting CPU card 1, disk drive control card and other extended interfaces, and can utilize wherein a slot to connect the identical machine plates of many groups as expanding, reach the number of connection that expands display; This bus driver 2 provides the signal of enhancing, row inputs in the card number demoder 3 again, the address of this card number demoder 3 is set by address selection switch 30, so that when organizing the card number demoder more and using simultaneously, prevent that the address from conflicting mutually, and same card number demoder 3 has 16 groups of output terminals, each output terminal is connected to the control end points of 16 groups of door switch 31, each door switch is serially connected with on the control bus 302 of 16 groups of I/O slots 32, and the address bus 303 of I/O slot 32 is not done control and directly input, any type of display card 33 of can pegging graft on each I/O slot 32.

The above-mentioned controlled form that makes I/O slot 32 by card number demoder 3 and door switch 31, must give each I/O slot 32 1 specific card number (ID) by card number demoder 3, when system's desire changes picture on its certain display card (display), write a corresponding card number to card number demoder 3 in the I/O mode, this demoder 3 promptly makes corresponding output terminal activation (ENABLE) to this card number decoding, thereby make corresponding door switch 31 connect control bus to corresponding I/O slot 32, so, corresponding display card 33 constitutes path with the CPU card, reach the effect of specifying display card, in like manner, the action of other display cards also adopt same way as with card number as distinguishing number input, decoding, start, the action that shows, action so in regular turn reaches the function that makes each display show different images.

Aforementioned the present invention adopts the signal break-make mode of control I/O slot 32, it is not direct control display card, so, the any type of at present display card of can arranging in pairs or groups uses, and unrestricted, and the effect of this kind control I/O slot 32, the also non-multiplex's control that is used in display card merely, also applicable to other such as RS-232 or other additional card, to reach the control corresponding function.

Relate to keyboard network of the present invention partly, referring again to shown in Figure 1, the adding of keyboard network thus, make the present invention constitute people's operating system more than one, but not only has simple demonstration effect, the interface that this keyboard network uses can connect a plurality of terminal unit interfaces, be that maximum transfer rate is 10M BPS, maximum transmission distance is 1200 meters an EIARS-485 standard, the present invention promptly is connected with each keyboard in this terminal unit interface position and promptly constitutes the keyboard network, constitute the signal transmission in 51 serial communication network controllers 53 and terminal unit interfaces with host-host protocol, and each terminal unit interface 51 has an identification number, serial communication network controller 53 is according to the order of identification number, inquire constantly whether each terminal unit interface 51 has button pressed, if terminal unit interface 51 is arranged then key scan sign indicating number (key) is passed to serial communication network controller 53 via the RS-485 network, after it receives, the identification number that is about to key scan sign indicating number and terminal unit interface deposits in the dual-port memory device 54, ask for for CPU card 1 and to be handled, and only needing whether have key set code to deposit in this dual-port memory device 54 of quantitative check, main system gets final product, and the required error checking of network communication, data re-transmission and scanning motion, be responsible for by aforementioned serial communication network controller 53 fully, and the burden that can exempt system CPU.

The system flow that many people of the present invention use electronic information exchange servomechanism as shown in Figure 3, it comprises: the step 101, initial; In the step 102, confirm each workstation (forming) situation by keyboard and display; In the step 103, calculate the time that each workstation uses; In the step 104, scan each workstation and have or not the information of issuing an order; In the step 105, judge this order by which workstation is sent; Step 106, the picture of the workstation that processing is given an order; In the step 107, notice needs the workstation exchange message of this information and handles the picture of this workstation.

In sum, the present invention constitutes multiple output/go into structure with its multiplex's steering logic unit and keyboard network, reaches single-processor and reaches the effect that many people use, and not only can make high speed processor obtain more effectively using, and obtain the actual benefit of centralized management.

Claims

1, a kind of many people use electronic information exchange servomechanism, cooperate a plurality of keyboards, display and corresponding display card to carry out work, and it comprises a CPU card, it is characterized in that this servomechanism further comprises:

2, servomechanism as claimed in claim 1 is characterized in that, described keyboard network further comprises:

3, servomechanism as claimed in claim 1 or 2 is characterized in that described multiplex's steering logic unit further comprises:

4, servomechanism as claimed in claim 3 is characterized in that terminal unit interface and the communication interface in the described keyboard network is the RS-485 standard interface.

5, servomechanism as claimed in claim 3 is characterized in that also comprising that link to each other with the card number demoder, as to be used to set this a card number demoder address selector switch in described multiplex's steering logic unit, to be used for the expansion of this servomechanism.