JPS62209647A - Data transfer controller - Google Patents

Data transfer controller

Info

Publication number
JPS62209647A
JPS62209647A JP61051568A JP5156886A JPS62209647A JP S62209647 A JPS62209647 A JP S62209647A JP 61051568 A JP61051568 A JP 61051568A JP 5156886 A JP5156886 A JP 5156886A JP S62209647 A JPS62209647 A JP S62209647A
Authority
JP
Japan
Prior art keywords
image
cpu
printer
input
reader
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP61051568A
Other languages
Japanese (ja)
Inventor
Yasuhisa Ishizawa
石沢　康久
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP61051568A priority Critical patent/JPS62209647A/en
Publication of JPS62209647A publication Critical patent/JPS62209647A/en
Priority to US08/306,734 priority patent/US5701512A/en
Priority to US08/904,649 priority patent/US5983285A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00204—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server
    • H04N1/00236—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server using an image reading or reproducing device, e.g. a facsimile reader or printer, as a local input to or local output from a computer
    • H04N1/00238—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server using an image reading or reproducing device, e.g. a facsimile reader or printer, as a local input to or local output from a computer using an image reproducing device as a local output from a computer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4004—Coupling between buses
    • G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
    • G06F3/1203—Improving or facilitating administration, e.g. print management
    • G06F3/1204—Improving or facilitating administration, e.g. print management resulting in reduced user or operator actions, e.g. presetting, automatic actions, using hardware token storing data
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
    • G06F3/1236—Connection management
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1278—Dedicated interfaces to print systems specifically adapted to adopt a particular infrastructure
    • G06F3/1284—Local printer device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00204—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server
    • H04N1/00236—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server using an image reading or reproducing device, e.g. a facsimile reader or printer, as a local input to or local output from a computer
    • H04N1/00241—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server using an image reading or reproducing device, e.g. a facsimile reader or printer, as a local input to or local output from a computer using an image reading device as a local input to a computer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00912—Arrangements for controlling a still picture apparatus or components thereof not otherwise provided for
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32496—Changing the task performed, e.g. reading and transmitting, receiving and reproducing, copying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00204—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0008—Connection or combination of a still picture apparatus with another apparatus
    • H04N2201/0034—Details of the connection, e.g. connector, interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0077—Types of the still picture apparatus
    • H04N2201/0081—Image reader
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0077—Types of the still picture apparatus
    • H04N2201/0082—Image hardcopy reproducer

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Computing Systems (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)

Abstract

PURPOSE:To enable plural CPU to use an input/output device in common with a simple constitution by adding a detecting means for the state of the input/ output device, a communication means with a host computer, and a switch means for connection between the host computer and the input/output device. CONSTITUTION:The signal lines 14 and 15 are provided as detecting means together with the CPU 1 and 2 as host computers, a control part 10 as a communication means, interface signals 17 and 18, a connection switch circuit 11 as a switch means, and an image reader 4 and an image printer 5 as input and output devices respectively. The part 10 detects the states of the reader 4 and the printer 5 through both lines 14 and 15 and then controls the connection between the CPU 1 or 2 and the reader 4 and the printer 5 respectively according the a command produced by the signal 17 and 18 given from the CPU 1 or 2.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明はデータ制御装置に関し、特に入出力装置を複数
の中央処理装置で共有使用するためのデータ伝送制御装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data control device, and more particularly to a data transmission control device for sharing an input/output device among a plurality of central processing units.

［従来の技術〕 従来のシステム、例えば画像処理システム等では、各中
央処理装置（以下ＣＰＵと言う）にイメージリーダ等の
画像入力装置やイメージプリンタ等の画像出力装置がそ
れぞれ少なくとも１台ずつ接続されている場合が多い。[Prior Art] In conventional systems, such as image processing systems, each central processing unit (hereinafter referred to as CPU) is connected to at least one image input device such as an image reader, and at least one image output device such as an image printer. In many cases.

しかしながら、この種のシステムで、全体の処理時間に
占めるこれら画像入出力装置の使用割合は極めて小さな
ものであり、このような使用状況にもかかわらず、各Ｃ
ＰＵ毎に高価な画像入出力機器を接続することは非常に
無駄が多い。このため一般にプリントサーバと呼ばれる
プリンタ制御装置を設け、ローカルエリアネットワーク
（以下ＬＡＮと言う）により複数のＣＰＵでプリンタを
共有するシステムも提案されている。しかし、このよう
なシステムでは、ＬＡＮの制御及び共有制御が大がかり
となり、小規模の共有制御には適当ではない。However, in this type of system, the usage rate of these image input/output devices in the overall processing time is extremely small, and despite this usage situation, each C
Connecting expensive image input/output devices to each PU is extremely wasteful. For this reason, a system has also been proposed in which a printer control device generally called a print server is provided and the printer is shared by a plurality of CPUs via a local area network (hereinafter referred to as LAN). However, such a system requires extensive LAN control and shared control, and is not suitable for small-scale shared control.

［発明が解決しようとする問題点］ 本発明は上記従来例に鑑みなされたもので、入出力装置
を複数のＣＰＵによって共有できる簡単なデータ伝送制
御装置を提供することを目的とする。[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned conventional example, and an object of the present invention is to provide a simple data transmission control device in which an input/output device can be shared by a plurality of CPUs.

［問題点を解決するための手段］ この問題を解決する一手段として、例えば第１図に示す
実施例のデータ共有制御装置は、検出手段としての信号
線１４．１５と、ホストコンピュータとしてのＣＰＵ１
．２と、通信手段としての制御部１０と、インターフェ
ース信号１７．１８と、切換手段としての接続切換回路
１１と、入出力装置としてイメージリーダ４とイメージ
プリンタ５とを備える。[Means for Solving the Problem] As a means for solving this problem, for example, the data sharing control device of the embodiment shown in FIG.
．． 2, a control section 10 as a communication means, an interface signal 17, 18, a connection switching circuit 11 as a switching means, and an image reader 4 and an image printer 5 as input/output devices.

［作用コ かかる第１図の構成において、制御部１０は信号線１４
．１５よりイメージリーダ４とイメージプリンタ５の状
態を検出し、ＣＰＵ　１又は２よりのインターフェース
信号１７．１８によるコマンドに従って、ＣＰＵＩ又は
２のいずれかとイメージリーダ４、イメージプリンタ５
との接続を制御する。[In the configuration shown in FIG.
．． 15 detects the status of the image reader 4 and image printer 5, and according to commands from the interface signal 17 and 18 from the CPU 1 or 2, the image reader 4 and the image printer 5 are
Control connections with

［実施例］ 以下図面を参照して本発明の一実施例を詳細に説明する
。[Example] An example of the present invention will be described in detail below with reference to the drawings.

［接続図（第２図）］ 第２図は本発明による一実施例を示す接続図である。１
．２はＣＰＵで、共有ＩＪａ装置２を介してイメージリ
ーダ４とイメージプリンタ５とを共有している。イメー
ジリーダ４は光学手段により原画の反射光を光電変換素
子に入力し、該光電変換素子により入力光を電気信号列
に変換して、画像データとして出力する。[Connection diagram (FIG. 2)] FIG. 2 is a connection diagram showing an embodiment according to the present invention. 1
．． 2 is a CPU that shares an image reader 4 and an image printer 5 via a shared IJa device 2. The image reader 4 uses optical means to input reflected light from the original image to a photoelectric conversion element, and the photoelectric conversion element converts the input light into an electrical signal train and outputs it as image data.

イメージプリンタ５は電気信号列としての画像データを
入力し、ドツトイメージで画像を用紙上に再現する。こ
のイメージプリンタとしては、レーザービームを走査し
、感光ドラム上にデータに対応した潜像を形成し、現像
、転写により用紙上にプリントするような、いわゆるレ
ーザービームプリンタ、或いは静電電極をもった静電プ
リンタ、或いはインク粒を射出しプリントするインクジ
ェットプリンタ、さらには感熱発色によりプリントする
サーマルプリンタ（熱転写プリンタを含む）等を使用す
ることかできる。また、イメージリーダ４は、直接イメ
ージプリンタ５と接続して複写機として機能ニドること
も可能である。The image printer 5 receives image data in the form of an electrical signal train and reproduces the image on paper as a dot image. This image printer is a so-called laser beam printer, which scans a laser beam to form a latent image corresponding to data on a photosensitive drum, and prints it on paper by development and transfer, or a printer with electrostatic electrodes. An electrostatic printer, an inkjet printer that prints by ejecting ink droplets, or a thermal printer (including a thermal transfer printer) that prints by heat-sensitive coloring can be used. The image reader 4 can also be directly connected to an image printer 5 to function as a copying machine.

共有制御装置３はＣＰＵＩまたはＣＰＵ２からの接続要
求により、所定のＣＰＵとイメージリーダ４又はイメー
ジプリンタ５とを接続する。又、ＣＰＵＩ、２のいずれ
もが、イメージリーダ４またはイメージプリンタ５を使
用していない時は、自動的にイメージリーダ４とイメー
ジプリンタ５とが接続され複写機として使用することが
できるようになっている。The shared control device 3 connects a predetermined CPU and the image reader 4 or the image printer 5 in response to a connection request from the CPUI or the CPU 2. Furthermore, when neither the CPUI 2 nor the image reader 4 or the image printer 5 is in use, the image reader 4 and the image printer 5 are automatically connected and can be used as a copying machine. ing.

［共有制御装置の構成図（第１図）］ 第１図は本発明の一実施例の共有制御装置３の　゛構成
を示すブロック図である。[Configuration diagram of shared control device (FIG. 1)] FIG. 1 is a block diagram showing the configuration of a shared control device 3 according to an embodiment of the present invention.

１１は接続切換回路で、イメージリーダ４及びイメージ
プリンタ５とＣＰＵＩ、２との接続を、制御部１０より
の切換信号１６によって切り換える。なお、イメージリ
ーダ４とイメージプリンタ５のインターフェース信号の
一部は、それぞれ信号線１４．１５によりステータス信
号として制御部１５に入力されており、制御部１５はこ
れらのステータス信号に基づいて、イメージリーダ４と
イメージプリンタ５の動作状態を監視する。１０は制御
部で、各ステータス信号やインターフェース信号１７．
１８に基づいて共有制御装置３の制御を行うもので、マ
イクロプロセッサ（ＭＰＵ）１００とその制御プログラ
ムやデータを内蔵するＲＯＭｌ０Ｉ、ワークエリアとし
て（７）ＲＡＭＩＯ２を含んでいる。A connection switching circuit 11 switches the connection between the image reader 4 and image printer 5 and the CPU 2 in response to a switching signal 16 from the control unit 10. Note that some of the interface signals of the image reader 4 and the image printer 5 are input to the control section 15 as status signals through signal lines 14 and 15, respectively, and the control section 15 controls the image reader and the image printer based on these status signals. 4 and the image printer 5 are monitored. Reference numeral 10 denotes a control unit that receives various status signals and interface signals 17.
18, and includes a microprocessor (MPU) 100, a ROM10I containing its control programs and data, and (7) RAMIO2 as a work area.

１７．１８はそれぞれＣＰＵＩとＣＰＵ２から共有制御
のために制御部１０に入力される制御信号で、ここでは
シリアルデータによるデータ送受信を行っている。１９
．２１はそれぞれＣＰＵ　１とＣＰＵ２のイメージリー
ダインターフェース信号、２０．２２はそれぞれＣＰＵ
ＩとＣＰＵ２のイメージプリンタインターフェース信号
である。Reference numerals 17 and 18 are control signals input from the CPU I and the CPU 2 to the control unit 10 for shared control, and data transmission and reception using serial data are performed here. 19
．． 21 are image reader interface signals of CPU 1 and CPU 2, respectively, 20.22 are CPU 1 and 2 image reader interface signals, respectively.
This is an image printer interface signal between I and CPU2.

１２．１３は接続切換回路１１内のスイッチで、制御部
１０よりの切換信号１６により、お互いに連動して動作
して接点をＡＮＣのいずれかに切り換え、各ＣＰＵとイ
メージリーダ４とイメージプリンタ５の接続をコントロ
ールする。Reference numerals 12 and 13 denote switches in the connection switching circuit 11, which operate in conjunction with each other to switch the contact to either ANC or ANC according to the switching signal 16 from the control unit 10, and switch between each CPU, image reader 4, and image printer 5. control connections.

イメージリーダインターフェース信号２３とイメージプ
リンタインターフェース信号２４は、大きく分けてコマ
ンド及びステータスを交信するための通信系信号と、画
像データを入出力するための画像系信号とからなり、イ
メージリーダインターフェース信号２３とイメージプリ
ンタインターフェース信号２４とは信号の画像系信号は
入出力方向が逆となっている。The image reader interface signal 23 and the image printer interface signal 24 are broadly divided into communication signals for communicating commands and status, and image signals for inputting and outputting image data. The input/output direction of the image system signal is opposite to that of the image printer interface signal 24.

複写機として機能する場合、イメージリーダ４はマスタ
モードとして直接イメージプリンタ５を制御するモード
となり、このモードをオフラインモードと呼ぶ。この時
、制御部１０よりの切換信号１６によりスイッチ１２．
１３は接点Ｃ側に切り換えられている。When functioning as a copying machine, the image reader 4 is in a master mode in which it directly controls the image printer 5, and this mode is called an offline mode. At this time, the switching signal 16 from the control section 10 causes the switch 12.
13 is switched to the contact C side.

一方、ＣＰＵＩ、２のいずれかに接続されている時、イ
メージリーダ４はスレーブモードとして動作し、ＣＰＵ
１．２の制御によりリード動作が行われる。このモード
をオンラインモードと呼ぶ。いま例えばオフラインモー
ドの時にイメージリーダ４のコピースタートキーが押さ
れると、イメージリーダ４は画像の読取りを開始し、画
像データをイメージプリンタ５に送出してプリントを実
行させ、複写機としてコピー動作を実行する。On the other hand, when connected to either CPUI, 2, image reader 4 operates in slave mode and
A read operation is performed under the control of 1.2. This mode is called online mode. For example, when the copy start key of the image reader 4 is pressed in offline mode, the image reader 4 starts reading the image, sends the image data to the image printer 5 to print it, and performs the copying operation as a copier. Execute.

なお、このようなオンラインモードとオフラインモード
の切換は、イメージリーダインターフェース信号の通信
系信号により、制御部１０から信号線１４を介して、イ
メージリーダ４にオンラインコマンド又はオフラインコ
マンドを発行することにより行われる。Note that such switching between online mode and offline mode is performed by issuing an online command or an offline command to the image reader 4 from the control unit 10 via the signal line 14 using the communication system signal of the image reader interface signal. be exposed.

インターフェース信号１７．１８はＲ５２３２Ｃとして
一般によく知られているシリアルインターフェース信号
であり、このシリアルインターフェース信号を通して、
制御部１０はＣＰＵＩ。Interface signals 17 and 18 are serial interface signals commonly known as R5232C, and through this serial interface signal,
The control unit 10 is a CPUI.

２と共有制御のためのコマンド及びステータスの交信を
行う。今ＣＰＵ１がイメージプリンタ５を使用したい場
合、ＣＰＵ　１はインターフェース信号１７を通じ共有
制御装置３のステータスを調ベ、イメージプリンタ５が
使用可能であればオーブンコマンドを発行し、ＣＰＵ　
１が専有使用することを宣言する。オーブンコマンドが
受付けられて専有状態になると所定のプリントを行い、
プリント終了後はクローズコマンドを発行して専有状態
の解除を宣言し、一連のシーケンスを終了する。2 and communicates commands and status for shared control. If the CPU 1 wants to use the image printer 5 now, the CPU 1 checks the status of the shared control device 3 through the interface signal 17, issues an oven command if the image printer 5 can be used, and sends an oven command to the CPU 1.
1 declares that it will be used exclusively. When the oven command is accepted and the oven becomes exclusive, the specified print will be performed.
After printing is completed, a close command is issued to declare release of the exclusive state, and the series of sequences ends.

制御部１０が接続切換回路１１との接続状態を切り換え
る場合、イメージリーダ４とイメージプリンタ５の動作
状態によっては、切り換えてはならない場合がある。こ
れはまず第１にイメージリーダ４及びイメージプリンタ
５が、ＣＰＵＩ又はＣＰＵ２の専有状態の時であり、こ
れはＣＰＵからのオーブンコマンドの受信からクローズ
コマンドの受信までの間を意味する。第２はオフライン
モード、すなわちどのＣＰＵも専有していない状態でも
、複写機として動作しているような、いわゆるローカル
コピー中は禁止しなければならない。このため制御部１
０はイメージリーダインターフェース信号の通信系信号
をモニタすることにより、イメージリーダ４とイメージ
プリンタ５との交信を傍゛受し、コピー期間中かどうか
を検出する必要がある。When the control unit 10 switches the connection state with the connection switching circuit 11, depending on the operating states of the image reader 4 and the image printer 5, switching may not be necessary. First of all, this is when the image reader 4 and the image printer 5 are in exclusive use of the CPUI or the CPU 2, which means the period from receiving the oven command from the CPU to receiving the close command. Second, it must be prohibited during offline mode, that is, during so-called local copying, in which the machine operates as a copying machine even when no CPU is occupied. For this reason, the control unit 1
0 needs to intercept the communication between the image reader 4 and the image printer 5 by monitoring the communication system signal of the image reader interface signal, and detect whether or not the copying period is in progress.

コピー動作の一連のシーケンスは以下のようになってい
る。まず、イメージプリンタ５の感光ドラムを回転させ
、回転が一定回転数になったら、用紙を用紙カセットよ
り、所定開始位置へ給送する。以上がコピー準備段階で
あり、次にイメージリーダ４のリード動作とイメージプ
リンタ５のプリント動作を同期して行うことによりコピ
ーを行う。用紙排出後、感光ドラムの回転を停止し、ジ
ャム等の異常がないかチェックを行い、一連のコピー動
作が完了する。従って、制御部１０はイメージリーダ４
とイメージプリンタ５との交信を傍受し、感光ドラム回
転開始コマンドから感光ドラム回転停止コマンドの後の
終了ステータスまでの期間を検出してコピー期間中の検
出を行い、切換禁止期間を設定している。The sequence of copy operations is as follows. First, the photosensitive drum of the image printer 5 is rotated, and when the rotation reaches a certain number of rotations, paper is fed from the paper cassette to a predetermined starting position. The above is the copy preparation stage, and then copying is performed by synchronizing the read operation of the image reader 4 and the print operation of the image printer 5. After the paper is ejected, the rotation of the photosensitive drum is stopped, and a check is made to see if there are any abnormalities such as jams, and a series of copying operations is completed. Therefore, the control unit 10 uses the image reader 4
Intercepts communication between the image printer 5 and the image printer 5, detects the period from the photosensitive drum rotation start command to the end status after the photosensitive drum rotation stop command, detects the copying period, and sets a switching prohibition period. .

イメージリーダインタフェース信号とイメージプリンタ
インタフェース信号の通信系信号は、ともにコマンドに
対して必ずステータスが返るようになっているため、こ
れらコマンドの発行後より、ステータスが返送されるま
での間では、信号の切り換えを行ってはならないのはも
ちろんである。Communication system signals such as image reader interface signals and image printer interface signals are both designed to always return a status in response to a command, so from the time these commands are issued until the status is returned, the signal is Of course, switching should not be performed.

［共有制御装置の動作説明（第３図）］第３図は共有制
御装置３の制御部１０のＲＯＭ１０１に格納されている
、ＭＰＵ　１００のＣＰＵよりの受信動作フローチャー
トである。[Explanation of Operation of Shared Control Device (FIG. 3)] FIG. 3 is a flowchart of the reception operation from the CPU of the MPU 100, which is stored in the ROM 101 of the control unit 10 of the shared control device 3.

まずステップＳ１でＣＰｔＪｌ又は２よりオーブンコマ
ンドを受信するとステップＳ２に進み、他のＣＰＵの使
用状況を調べる。いまＣＰＵＩよりオーブンコマンドが
あったとすると、ＣＰＵ２が使用中でなければ、ステッ
プＳ３に進みコピー中かどうかをみる。コピー中の時、
あるいはステップＳ２でＣＰＵ２が使用中のときはステ
ップＳ４に進み、受付不能メツセージをＣＰＵＩに送出
する。First, when an oven command is received from CPtJl or CPtJl or 2 in step S1, the process proceeds to step S2 to check the usage status of other CPUs. Assuming that there is now an oven command from the CPUI, if the CPU 2 is not in use, the process advances to step S3 to check whether or not copying is in progress. While copying,
Alternatively, if the CPU 2 is in use in step S2, the process advances to step S4, and an unacceptable message is sent to the CPUI.

とのＣＰＵも使用していない状態、いわゆるオフライン
モードでしかもコピー中でもない場合、即ちイメージリ
ーダ４やイメージプリンタ５が使用可能状態の時は、ス
テップＳ５でイメージリーダ４ヘオンラインコマンドを
発行し、オフラインモードよりオンラインモードへ切り
換える。When the CPU of the image reader 4 and the image printer 5 are not in use, so-called offline mode, and copying is not in progress, that is, when the image reader 4 and image printer 5 are available, an online command is issued to the image reader 4 in step S5, and the image reader 4 is offline. Switch from mode to online mode.

ステップＳ６ては切換信号１６を出力して、ＣＰＵＩと
イメージリーダ４及びイメージプリンタ５とを接続する
ように、スイッチ１２．１３の接点Ａに接続する。これ
でＣＰＵ　１の専有使用状態となる。ステップＳ７では
ＣＰＵ　１よりクローズコマンドを受信するかを調べ、
受信すればステップＳ８に進み、切換信号１６によりス
イッチ１２．１３の接点をＡからＣに切り換える。ステ
ップＳ９ではイメージリーダ４にオフラインコマンドを
発行して、オンラインモードからオフラインモードへ切
り換えて、オンライン待機状態とする。In step S6, the switching signal 16 is outputted and connected to the contact A of the switch 12.13 so as to connect the CPU, the image reader 4, and the image printer 5. This puts CPU 1 in exclusive use. In step S7, it is checked whether a close command is received from CPU 1,
If received, the process advances to step S8, and the contacts of the switches 12 and 13 are switched from A to C using the switching signal 16. In step S9, an offline command is issued to the image reader 4 to switch from online mode to offline mode and put it in an online standby state.

［状態遷移図の説明（第４図）］ 第４図はイメージリーダ４、イメージプリンタ５、及び
共有制御装置３の状態の１穆を示す状態遷移図である。[Explanation of State Transition Diagram (FIG. 4)] FIG. 4 is a state transition diagram showing one state of the image reader 4, image printer 5, and shared control device 3.

電源オン後、４０で所定のイニシャライズ処理を行った
後、状態４１でオフラインモードとなりオフライン待機
状態に入る。ＣＰＵ１．２よりの専有要求（オーブンコ
マンド）が発行されると、イメージリーダ４ヘオンライ
ンコマンドを発行することにより状態４１に移行し、オ
ンラインモードに切り換えられ、ＣＰＵＩよりのオーブ
ン又はＣＰＵ２よりのオーブンかにより、ＣＰＵＩ又は
ＣＰＵ２の専有状態となり、状態４３又は４４に移行す
る。After the power is turned on, a predetermined initialization process is performed at 40, and then the offline mode is entered at state 41 to enter an offline standby state. When an exclusive request (oven command) is issued from the CPU 1.2, an online command is issued to the image reader 4, which transitions to state 41, switches to online mode, and switches the oven to the CPU 2 or the oven from the CPU 2. As a result, the state becomes exclusive to the CPUI or CPU2, and the state shifts to state 43 or 44.

ＣＰＵ　１又はＣＰｔＪ２の専有状態からは、ｃｐＵ１
クローズ又はＣＰＵ２クローズコマンドにより、オンラ
インの待機状態となり、自動的にイメージリーダ４ヘオ
フラインコマンドを発行し、状態４２より状態４１に移
行し、再び待機状態となる。From the exclusive state of CPU 1 or CPtJ2, cpU1
A close command or a CPU 2 close command causes the camera to enter an online standby state, automatically issues an offline command to the image reader 4, shifts from state 42 to state 41, and returns to a standby state.

オフライン°待機中にコピースタートキーが押されると
、状態４５に８行してローカルコピーを行い、終了とと
もに再び状態４１に戻り、オフライン待機状態となる。When the copy start key is pressed during offline standby, the process goes to state 45 for 8 lines and performs local copying, and upon completion returns to state 41 and enters offline standby.

尚、本実施例ではＣＰＵは２台として説明したがこれに
限定されるものでなく、ＣＰＵの数は制限なく使用する
ことが可能である。Although the present embodiment has been described using two CPUs, the present invention is not limited to this, and the number of CPUs can be used without any limit.

又、共有制御のためのシリアルインターフェース信号は
Ｒ３２３２Ｃを使用しているが、他のシリアルインター
フェース信号でも良く、更にパラレルのインターフェー
スでも良い。Further, although R3232C is used as the serial interface signal for shared control, other serial interface signals or even a parallel interface may be used.

又更に、接続切換回路１１は、イメージリーダインター
フェース信号とイメージプリンタインターフェース信号
を同時に、同じＣＰＵへ切り換えているが、別々のタイ
ミングで別々のＣＰＵへ切り換えるようにしても良い。Furthermore, although the connection switching circuit 11 switches the image reader interface signal and the image printer interface signal to the same CPU at the same time, the connection switching circuit 11 may switch the image reader interface signal and the image printer interface signal to different CPUs at different timings.

このように本発明の要旨から逸脱しない範囲で種々変形
して実施することができる。As described above, various modifications and variations can be made without departing from the gist of the present invention.

なお、本実施例では入出力装置は画像入出力装置として
説明したが、これに限定されるものでなく他の入出力装
置でも良いことはもちろんである。Although the input/output device in this embodiment has been described as an image input/output device, it is needless to say that the input/output device is not limited to this and may be any other input/output device.

以上説明したように本実施例によれば、複数の中央処理
装置が本来の画像入出力装置のインターフェース信号を
変更することなく、画像入出力装置を共有することがで
きるという効果がある。As described above, this embodiment has the advantage that a plurality of central processing units can share an image input/output device without changing the original interface signal of the image input/output device.

［発明の効果１ 以上述べた如く本発明によれば、簡単な構成で入出力装
置を複数のＣＰＵによって共有できるという効果がある
。[Advantageous Effects of the Invention 1] As described above, according to the present invention, an input/output device can be shared by a plurality of CPUs with a simple configuration.

【図面の簡単な説明】 第１図は本発明の一実施例の共有制御装置の構成因、 第２図は本実施例の共有制御装置の接続を示す図、 第３図は制御部の受信動作フローチャート、第４図は共
有制御装置の状態遷穆図である。 図中、１，２・・・ＣＰＵ、３・・・共有制御装置、４
・・・イメージ、リーダ、５・・・イメージプリンタ、
１０・・・制御部、１１・・・接続切換回路、１２．１
３・・・スイッチ、１４．１５・・・信号線、１６・・
・切換信号、１７．１８・・・インターフェース信号で
ある。 第１図 第４図[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 shows the components of a shared control device according to an embodiment of the present invention, Fig. 2 shows the connections of the shared control device according to this embodiment, and Fig. 3 shows the reception of the control section. The operation flowchart, FIG. 4, is a state transition diagram of the shared control device. In the figure, 1, 2...CPU, 3...Shared control device, 4
...image, reader, 5...image printer,
10... Control unit, 11... Connection switching circuit, 12.1
3...Switch, 14.15...Signal line, 16...
- Switching signal, 17.18...interface signal. Figure 1 Figure 4

Claims (2)

【特許請求の範囲】[Claims] （１）複数のホストコンピュータと入出力装置に介在す
るデータ伝送制御装置であつて、前記入出力装置の状態
を検知する検知手段と、前記ホストコンピュータとの通
信手段と、前記ホストコンピュータと前記入出力装置の
接続を切り換える切換手段とを備えたことを特徴とする
データ伝送制御装置。(1) A data transmission control device interposed between a plurality of host computers and an input/output device, which includes a detection means for detecting the state of the input/output device, a means for communicating with the host computer, and a data transmission control device between the host computer and the input/output device. 1. A data transmission control device comprising: switching means for switching the connection of an output device. （２）入出力装置がイメージリーダとイメージプリンタ
であることを特徴とする特許請求の範囲第１項記載のデ
ータ伝送制御装置。(2) The data transmission control device according to claim 1, wherein the input/output devices are an image reader and an image printer.
JP61051568A 1986-03-11 1986-03-11 Data transfer controller Pending JPS62209647A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP61051568A JPS62209647A (en) 1986-03-11 1986-03-11 Data transfer controller
US08/306,734 US5701512A (en) 1986-03-11 1994-09-15 Data transmission control apparatus for system with input/output units used in common by several CPU's
US08/904,649 US5983285A (en) 1986-03-11 1997-08-01 Data communication control apparatus and method for controlling date communication among at least one data processing apparatus and a plurality of devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61051568A JPS62209647A (en) 1986-03-11 1986-03-11 Data transfer controller

Publications (1)

Publication Number Publication Date
JPS62209647A true JPS62209647A (en) 1987-09-14

Family

ID=12890568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61051568A Pending JPS62209647A (en) 1986-03-11 1986-03-11 Data transfer controller

Country Status (1)

Country Link
JP (1) JPS62209647A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6021671A (en) * 1983-07-18 1985-02-04 Canon Inc Image reading device
JPS6136833A (en) * 1984-07-28 1986-02-21 Canon Inc Picture processing system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6021671A (en) * 1983-07-18 1985-02-04 Canon Inc Image reading device
JPS6136833A (en) * 1984-07-28 1986-02-21 Canon Inc Picture processing system

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