Abstract:
An interface, to which a recording medium storing at least one first setting information item is removably attached to a printer. A storage stores hardware specification data. A reader reads out the at least one first setting information item from the recording medium attached to the interface. A register judges whether the at least one read out first setting information item matches with the hardware specification data, and registers the first setting information item which matches with the hardware specification data as at least one second setting information item. A selector selects one of the at least one second setting information item as a print condition.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    The present invention relates to a printer and a print-condition setting method for the printer, and more particularly to a printer capable of performing printing with an external memory medium such as a memory card attached to the printer according to print-condition setting information read from the external memory medium, and to a print-condition setting method for the printer.  
           [0002]    Further, the present invention relates to a printer capable of performing printing according to print-condition setting information set by peripheral equipment such as a digital still camera (hereinafter called the “digital camera”) to be connected via a communication interface and to a print-condition setting method for the printer.  
           [0003]    Stand-alone printers (sometimes called direct printers) capable of printing data on printing paper independently have come into wide used recently without the necessity of their being connected to host computers represented by personal computers.  
           [0004]    Typically, such a stand-alone printer reads data on printing objects from a memory card added to a card interface and prints out the data. Therefore, any user not owning a personal computer or the like can utilize the stand-alone printer for directly printing the pictorial data taken in by a digital camera and stored in a memory card without a personal computer.  
           [0005]    There is also a stand-alone printer for directly reading pictorial data from a digital camera so as to print the data after being connected to the digital camera via a communication interface such as a USB without attaching a memory card to the printer.  
           [0006]    Since the stand-alone printer need not be connected to the host computer, the printer body is provided with a control panel (user interface) for setting print instructions and various print conditions that have heretofore been set to specify, for example, types and sizes of printing paper, the number of printing copies, print quality, layouts and so forth over the host computer.  
           [0007]    Although the stand-alone printer above is designed so that various print conditions can be set by a user through the control panel, it has been only possible to set the print conditions within a range of contents that have been incorporated into a control device in the printer body. With respect to setting layouts, for example, only the layouts considered to be in general use including printing post cards, seals and indexes, have been defined and performing printing in accordance with a layout for specific use could not have been done.  
           [0008]    Consequently, there has been proposed a stand-alone printer so arranged that a print-condition file designating a layout for specific use is stored in a memory card beforehand whereby to read the print-condition file from the memory card in order to set the print conditions when printing is done in accordance with the layout without being incorporated into the control device of the printer body beforehand.  
           [0009]    However, the control panel of the stand-alone printer is provided with only necessary and sufficient functions to achieve the original display/selection objective of setting various print conditions but still has a problem in that it is not user-friendly when a desired print-condition file is selected from the memory card with a plurality of print-condition files stored therein so as to set the desired print conditions. Moreover, a highly functional control panel is difficult to provide in view of keeping the production cost lower.  
         SUMMARY OF THE INVENTION  
         [0010]    It is therefore an object of the invention to provide a method of readily selecting a desired print-condition file from a memory card with a plurality of print-condition files stored therein and a printer having a user interface arrangement for effecting the method.  
           [0011]    It is also an object of the invention to propose a method of readily selecting a desired print-condition file by using peripheral equipment connected via a communication interface and a printer for effecting the method.  
           [0012]    In order to achieve the above objects, according to the present invention, there is provided a printer, comprising:  
           [0013]    an interface, to which a recording medium storing at least one first setting information item is removably attached;  
           [0014]    a storage, which stores hardware specification data;  
           [0015]    a reader, which reads out the at least one first setting information item from the recording medium attached to the interface;  
           [0016]    a register, which judges whether the at least one read out first setting information item matches with the hardware specification data, and registers the first setting information item which matches with the hardware specification data as at least one second setting information item; and  
           [0017]    a selector, which selects one of the at least one second setting information item as a print condition.  
           [0018]    In this configuration, when the relevant script is read in from an external storage medium (e.g., memory card) stored with scripts (setting information item) for setting a plurality of print conditions, the scripts designating print parameters (e.g., paper size) supported by the printer are registered in an internal memory. Only the script conforming to the print parameters set in a user interface is indicated.  
           [0019]    Accordingly, a desired print-condition script can readily be selected from the memory card stored with a plurality of print-condition scripts in the user interface of the printer.  
           [0020]    Preferably, the storage stores at least one third setting information item in advance. The selector selects the print condition from the third setting information item when no second setting information item is registered.  
           [0021]    Preferably, each of the first setting information item includes a first value indicating a size of a print medium on which printing is performed. The hardware specification data includes at least one second value indicating a size of a print medium on which the printer can perform printing. The register registers the first setting information item as the second setting information item when the first value matches with the second value.  
           [0022]    Preferably, the selector selects the print condition upon receipt of an instruction from a user, and displays the selected print condition to the user.  
           [0023]    Here, it is preferable that the print condition includes a size of a print medium on which printing is performed.  
           [0024]    Preferably, the register assigns an identifier to each of the at least one second setting information item. The selector sequentially displays the identifier upon receipt of an instruction from a user.  
           [0025]    According to the present invention, there is also provided a method of setting a print condition of a printer provided with an interface to which a recording medium is removably attached, comprising the steps of:  
           [0026]    reading out at least one first setting information item stored in the attached recording medium;  
           [0027]    judging whether the at least one first setting information item matches with hardware specification data stored in the printer;  
           [0028]    registering the at least one first setting information item which matches with the hardware specification data as at least one second setting information item; and  
           [0029]    selecting one of the at least one second setting information item as the print condition.  
           [0030]    According to the present invention, there is also provided a printer, to which a peripheral device provided with a recording medium which stores at least one first setting information item is connected via an interface, the printer comprising:  
           [0031]    a storage, which stores hardware specification data;  
           [0032]    a transmitter, which transmits the hardware specification data to the peripheral device via the interface; and  
           [0033]    a receiver, which receives print job data including a print condition which has been selected in the peripheral device, via the interface.  
           [0034]    According to the present invention, there is also provided a method of printing performed in a printer, to which a peripheral device provided with a recording medium which stores at least one first setting information item is connected via an interface, the method comprising the steps of:  
           [0035]    storing hardware specification data in the printer;  
           [0036]    transmitting the hardware specification data to the peripheral device via the interface; and  
           [0037]    selecting one of the at least one first setting information item as a print condition, based on the transmitted hardware specification data;  
           [0038]    transmitting print job data including the print condition to the printer via the interface; and  
           [0039]    performing printing at the printer based on the transmitted print job data.  
           [0040]    According to the present invention, there is also provided a print system, comprising:  
           [0041]    a printer;  
           [0042]    a peripheral device;  
           [0043]    an interface, which connects the printer and the peripheral device;  
           [0044]    a storage provided in the printer to store hardware specification data;  
           [0045]    a recording medium, provided in the peripheral device to store at least one first setting information item;  
           [0046]    a first transmitter, provided in the printer to transmit the hardware specification data to the peripheral device via the interface;  
           [0047]    a display, provided in the peripheral device to display the first setting information item which matches with the hardware specification data as at least one second setting information item;  
           [0048]    a selector, provided in the peripheral device to select one of the at least one second setting information item as a print condition, upon receipt of an instruction from a user;  
           [0049]    a data generator, provided in the peripheral device to generate print job data including the print condition;  
           [0050]    a second transmitter, provided in the peripheral device to transmit the print job data to the printer via the interface; and  
           [0051]    a receiver, provided in the printer to receive the print job data to perform printing.  
           [0052]    According to the present invention, there is also provided a peripheral device connected to a printer via an interface, comprising:  
           [0053]    a recording medium, which stores at least one first setting information item;  
           [0054]    a receiver, which receives hardware specification data of the printer which is transmitted from the printer via the interface;  
           [0055]    a display, which displays the first setting information item which matches with the hardware specification data as at least one second setting information item;  
           [0056]    a selector, which selects one of the at least one second setting information item as a print condition, upon receipt of an instruction from a user;  
           [0057]    a data generator, which generates print job data including the print condition; and  
           [0058]    a transmitter, which transmits the print job data to the printer via the interface.  
           [0059]    In this configuration, since only the print-condition setting information is indicated, a desired print-condition file can readily be selected from the memory card stored with a plurality of print-condition files, in the interface of the peripheral device such as a digital camera connected to the printer.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0060]    The above objects and advantages of the present invention will become more apparent by describing in detail preferred exemplary embodiments thereof with reference to the accompanying drawings, wherein:  
         [0061]    [0061]FIG. 1 is a diagram showing the external appearance of a printer according to a first embodiment of the invention;  
         [0062]    [0062]FIG. 2 is a block diagram of a hardware configuration of the printer shown in FIG. 1;  
         [0063]    [0063]FIG. 3 is a diagram illustrating a data structure in a memory card shown in FIG. 1;  
         [0064]    [0064]FIG. 4 is a diagram illustrating an example of contents of a print-condition setting script stored in the memory card;  
         [0065]    [0065]FIG. 5 is a diagram illustrating an example of a user interface of the printer;  
         [0066]    [0066]FIG. 6 is a flowchart explanatory of processing performed when the memory card is attached to the printer;  
         [0067]    [0067]FIG. 7 is a diagram illustrating an example of the user interface;  
         [0068]    [0068]FIG. 8 is a flowchart explanatory of the display/selection processing performed in the user interface;  
         [0069]    [0069]FIG. 9 is a flowchart explanatory of processing when a layout selection is performed;  
         [0070]    [0070]FIG. 10 is a diagram illustrating an example of the user interface;  
         [0071]    [0071]FIGS. 11A to  11 D are diagrams explanatory of the operation of the printer;  
         [0072]    [0072]FIG. 12 is a block diagram explanatory of the overall arrangement of a printer system according to a second embodiment of the invention;  
         [0073]    [0073]FIG. 13 is a diagram illustrating a user interface of a digital camera;  
         [0074]    [0074]FIG. 14 is a sequence diagram explanatory of the processing of setting print conditions in the print system shown in FIG. 12; and  
         [0075]    [0075]FIG. 15 is a diagram illustrating an example of a print-setting screen in the digital camera. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0076]    Preferred embodiments of the invention will now be described by reference to the accompanying drawings. However, the invention is not limited to these embodiments but intended to describe the invention by way of example. Moreover, the invention can be implemented in various modes without departing from the substance thereof.  
         [0077]    As shown in FIG. 1, a liquid crystal panel  11  and a plurality of buttons  12  are provided on the top face of a body of a printer  1  to form a user interface. In other words, a predetermined guidance message and so forth are displayed on the liquid crystal panel  11 , so that a user is allowed to supply to the printer  1  print conditions and print instructions to be set interactively by pushing the buttons  12  in a manner corresponding to the contents displayed. Further a card slot  13  as an external interface is provided in the front body of the printer  1 . The card slot  13  is in conformity with the PCMCIA standard and so arranged as to make replaceable a memory card  2  conforming to the standard.  
         [0078]    Such a printer  1  is known as a stand-alone printer that need not be connected to a host computer. More specifically, the printer  1  displays a message on the liquid crystal panel  11  and awaits print instructions, the message urging the user to provide instructions about carrying out printing when the printer  1  detects the attachment of, for example, the memory card  2  into the card slot  13 . Incidentally, the user is able to set the print conditions and provide the print instructions by pushing the buttons as occasion demands. Upon acceptance of the user&#39;s print instructions, the printer  1  reads image data stored in the memory card  2  and prints the data on printing paper. Thus, the user is able to utilize the printer  1  in such a manner as to directly print pictorial data deriving from a digital camera without the aid of the host computer.  
         [0079]    However, such a stand-alone printer may be provided with any one of the interfaces including a parallel interface, a USB interface, a network interface or the like.  
         [0080]    The memory card  2  incorporates a nonvolatile rewritable memory and is attached or detached with respect to the printer  1  and a digital camera. The user takes image data in the memory card  2  by taking photographs with the digital camera with the memory card  2  installed therein, and then takes out the memory card  2  from the digital camera and attaches the memory card  2  to the printer  1  for printing purposes. The image data thus taken in is stored in the memory card  2  in the form of files. Further, scripts for setting predetermined print conditions to the printer  1  (hereinafter, referred as “print-condition setting scripts”) have been stored in the memory card  2  beforehand.  
         [0081]    In a case where the memory card  2  attached to the digital camera is a Compact Flash™ memory, for example, the memory is to be fitted into the card slot  13  of the printer  1  based on the PCMCIA standard via a PC card adaptor; however, this arrangement means to include the use of such a PC card adaptor in a broad meaning.  
         [0082]    As shown in FIG. 2, a processor  21  executes various control programs stored in a ROM  22  while using a RAM  23  serving as a main storage and also performs integral control over the printer  1 . In other words, the processor  21  allows the programs to be executed so that the printer  1  can performs the predetermined functions in cooperation with the hardware. According to this embodiment, the printer  1  implements at least the following functions including user interface, print-condition setting, script interpreting/executing, image generating and print-control. Further, the ROM  22  stores specification information that it supports, for example, monochromatic/color printing, paper sizes and so forth.  
         [0083]    A user interface circuit  24  is a circuit for controlling the user interface attained via the liquid crystal panel  11  and the various buttons  12 . An external interface circuit  25  allows the processor  21  to access the memory card  2  put into the card slot  13 . When the memory card  2  is put into the card slot  13 , the external interface circuit  25  requests the processor  21  for an interruption. On detecting the interruption, the processor  21  awaits an input of print-condition setting from the user. With the print-condition setting, the user is able to select print conditions prepared on the printer side via the user interface and also to select a desired print-condition setting file out of a plurality of print-condition setting files stored in the memory card  2 . After the print-condition setting file is selected by the user via the user interface circuit  24 , the processor  21  accepts the print instructions, interprets the selected print conditions (including the selection of print-condition setting script) and generates image data based on the pictorial data.  
         [0084]    An image memory  26  is a memory for temporarily storing the image data thus generated. An engine controller  27  reads the image data stored in the image memory  26  while controlling the operation of a print engine  28  and supplies the image data to the print engine  28 . The engine controller  27  is activated by the print command sent from the processor  21  as a trigger when print image data for a predetermined printing width is obtained in the image memory  26 . The print engine  28  is constituted of, for example, a paper feed mechanism and a print head to perform printing on a printing medium such as paper. In this case, a specific kind of printer such as a laser or serial printer may be employed, if necessary, as the print engine  28 .  
         [0085]    A communication interface circuit  29  is for use in communicating with the host computer represented by a personal computer and various interfaces such as a parallel interface, a USB interface and a network interface is applicable thereto. Moreover, the communication interface circuit  29  is not limited to a personal computer but preferably able to communicate with any other peripheral equipment such as a digital camera provided with the data to be printed. There is a USB communication interface as such a communication interface.  
         [0086]    As shown in FIG. 3, the memory card  2  stores an image data file and the print-condition setting file. Each file may be managed hierarchically. Print-condition setting script is typically and separately prepared/edited by the personal computer and stored in the memory card  2 . Preferably, a plurality of print-condition setting scripts defining various print conditions are stored; however, there may be cases where only one print-condition setting script is stored and where no print-condition setting script is stored.  
         [0087]    In FIG. 4, line numbers are added for the sake of convenience. As shown in this figure, the exemplary print-condition setting script essentially consists of header sections (lines  1  to  14 ) and page sections (lines  15  to  16 ). A command for designating a paper size of “3.5×5 inches” (so-called L size) is described on the 13th line of the header section.  
         [0088]    As shown in FIG. 5, the user interface essentially consists of the liquid crystal panel  11  and the various buttons  12 . The liquid crystal panel  11  provides sub-items  52  in each item  51 , including ‘print method,’‘kind of paper,’ ‘paper size’ and so forth. Although all sub-times  52  are shown in this figure, only the selected sub-items  52  are displayed during the operation. Various print conditions can be set to the printer  1  among the sub-items  52 . In this case, though six kinds of sub-items are prepared for a ‘layout’ item beforehand, which are called ‘standard layouts,’ those which can be provided and utilized by the print-condition setting script are called ‘extended layouts.’ 
         [0089]    The item  51  subjected to the selection is indicated by a cursor pointer  53  (hatched one), the item  51  and the sub-item  52  being selected by pushing one of the left, right, up and down cursor buttons  12   a.  More specifically, the display of the cursor pointer  53  is moved in the corresponding direction when the user pushes the up or down cursor button, so that the user is informed of the item  51  subjected to the selection. While one of the items  51  is selected, the display of the sub-item  52  is moved in the corresponding direction when the user pushes the left or right cursor button, so that the user is informed of the sub-item  52  subjected to the selection. Through the above operation performed by the user, the values of print-condition parameters in conformity with the sub-items thus selected are set and reflected on the actual print conditions.  
         [0090]    When the memory card is attached to the printer  1 , the processing shown in FIG. 6 is performed by a memory card management program (module) and executed by the printer  1  in operation.  
         [0091]    As shown in FIG. 6, the memory card management program is executed to monitor any interruption from the external interface circuit  25  (STEP  601 ). The interruption occurs when the memory card is attached to the card slot  13 . On detecting the interruption, the memory card management program gains access to the memory card  2  and checks whether the print-condition setting file exists therein (STEP  602 ). Then the memory card management program checks the number of image data files stored in the memory card  2  and controls the external interface circuit  25  so that the set value of the present print-condition parameter is displayed on the liquid crystal panel  11 . FIG. 7 shows an example of the user interface immediately after the memory card  2  is attached to the card slot  13 . In the ‘layout’ item, ‘the whole page printing’ prepared as the standard layout has been selected in this example.  
         [0092]    In a case where print-condition setting files are stored in the memory card  2 , the memory card management program selects and reads one print-condition setting file via the external interface circuit  25  (STEP  603 ). The memory card management program subsequently analyzes the script representing the contents of the print-condition setting file (STEP  604 ) and checks whether the paper size designated by the setting file is the paper size that is supported by the printer (STEP  605 ). More specifically, the memory card management program refers to the value of “HdPhysicalPaperSize” described in the header section of the print-condition setting script. When the memory card management program decides that the script is consequently a supported script, the memory card management program registers the print-condition setting script in a predetermined area of the RAM  23  (STEP  606 ). In a case where the script designates “A3” size and where the printer does not support printing using the paper, for example, the script is not registered. When the script is registered, the memory card management program assigns an identification number to the print-condition setting script. The identification number is used to make the user identify the number over the user interface. The memory card management program performs the processing above with respect to all the print-condition setting files stored in the memory card  2  (STEPs  602 - 606 ). When the memory card management program finishes performing the processing above, the memory card management program remains to stand by until the memory card  2  is removed (STEP  607 ). When the memory card  2  is removed, the memory card management program returns to STEP  601  and monitors the entry of the memory card  2 .  
         [0093]    When the display/selection processing is performed in the user interface, processing shown in FIG. 8 is performed by, for example, a user interface program (module), and the printer  1  in operation executes this program.  
         [0094]    As described above, the user interface program displays the contents of the present status of the selected print-condition parameter when the memory card  2  is attached to the card slot  13  (STEP  801 ; e.g., FIG. 7). The user is allowed to set print conditions by pushing the up, down, left and right cursor buttons  12   a  in this condition. When the user operates the left or right cursor button (Yes at STEP  802 ), the user interface program changes the display of the sub-item  52  in the item  51  sequentially (STEP  803 ). When a layout is selected, the processing of selecting the standard layout or an extended layout is performed as will be described later.  
         [0095]    When user operates the up or down cursor button (Yes of STEP  804 ), on the other hand, the user interface program moves the cursor  53  among the items  51  (STEP  805 ).  
         [0096]    When the user pushes the left or right cursor button at the time the ‘layout’ item is selected, the processing shown in FIG. 9 is performed. The user interface program checks whether the user&#39;s operation is intended to set the standard layout or an extended layout (STEP  901 ). When the setting of the standard layout is requested, the user interface program causes the highlighted display to move to the sub-items  52  of the layout item, so that one parameter is to be selected (STEP  902 ).  
         [0097]    When the setting of the standard layout is not requested, that is, when any sub-item other than the sub-items  52  at both ends is selected, on the other hand, the user interface program checks whether any script has been registered in a predetermined area in the RAM  23  (STEP  903 ). When the user interface program decides that no script has been registered, STEP  902  is followed because only the standard layout can be displayed/selected. In this case, the sub-item  52  on the opposite side is displayed such that it looks as if it returns to the first place. When the user interface program decides that there exists a script, on the other hand, the user interface program performs the following processing including displaying/selecting the extended layout.  
         [0098]    In other words, the user interface program selects one registered script (STEP  904 ). Then the user interface program compares the paper size designated by the selected script with the paper size selected over the user interface and checks whether both the paper sizes conform to each other (STEP  905 ).  
         [0099]    In a case where both the paper sizes do not conform to each other, the user interface program returns to STEP  904  and selects the next one script and does checking likewise. As only the paper size that the user interface program supports previously has been registered, the user interface program is able to finally select the conformed script by checking the paper sizes sequentially. When the paper size is decided to be in conformity with what is intended at STEP  904 , the identification number attached to the script is displayed on the user interface (STEP  908 ). In a case where A4 size is selected over the user interface, for example, only a script designating a layout for A4 size out of those stored in the memory card  2  are sequentially displayed.  
         [0100]    [0100]FIG. 10 shows an example of the user interface at this time. As shown in this figure, the display areas of ‘photo #’ (used for photo selection) and ‘sheet’ (used for designating printed number of sheet) of the items  51  are utilized respectively as display areas  101   a  and  101   b  for extended layouts. In other words, the diagram indicates a state in which “UL” as an extended layout display and a script with an assigned identification number “001” have been selected. When the user pushes the left (or right) cursor button in this state, the user interface program selects the script and displays its identification number at the same time.  
         [0101]    In a case where the user pushes the up (or down) cursor button to move the cursor pointer  53  to ‘paper size’ of the item  51  first and selects an extended layout in ‘layout’ of the item  51  again after pushing the left (or right) button so as to select ‘post card’ of the sub-item  52 , the user interface program performs the processing shown in FIG. 9 similarly. Then a script designating a layout for postcard size is displayed and the script for a postcard is displayed each time the left (or right) cursor button is pushed.  
         [0102]    The operation of the printer  1  according to this embodiment of the invention will now be described by with reference to FIGS. 11A to  11 D. As shown in FIG. 11A, there are nine print-condition setting files (scripts) to be stored in the memory card  2 : namely, “B4TATE.USD” and “B4YOKO.USD” as scripts for defining layouts for B4 size; “B5TATE.USD” and “B5YOKO.USD” as scripts for defining layouts for B5 size; and “NENG.USD,” “HIKKOSHI.USD” and “KEKKON.USD” as scripts for defining layouts for postcard size. In this case, the printer  1  is considered to support sizes of ‘roll paper,”A4’ and ‘postcard.’ 
         [0103]    When the user fits the memory card  2  into the card slot  13 , the printer  1  reads in and interprets these print-condition setting files. Further, the printer  1  assigns identification numbers to the respective scripts for paper sizes that the printer  1  supports for the purpose of registration as shown in FIG. 11B. When the user selects not only the A4 paper size over the user interface but also the corresponding layout in this state, for example, switching of displays is made as shown in FIG. 11C, whereas when the user selects not only the postcard size but also the corresponding layout switching of displays is made as shown in FIG. 11D.  
         [0104]    The processing order may be changed in order or otherwise may be arranged in parallel order unless any inconsistency occurs in the operation.  
         [0105]    According to this embodiment, paper sizes designated by print-condition setting files stored in a memory card is first checked, so that only scripts designating paper sizes supported by a printer is read out; and only scripts associated with paper sizes selected on a user interface are subsequently displayed as alternatives. Therefore, the user can easily select a desired script.  
         [0106]    Further, as print-condition files designating extended layouts are stored in a memory card beforehand whereby to allow a printer to set print conditions accordingly, so that it is possible to provide a printer which is full of expandability and flexibility in view of setting print conditions.  
         [0107]    Still further, extended layouts can be displayed/selected sequentially in the user interface provided with only necessary and sufficient functions to make the printer achieve the original display/selection objective of setting various print conditions.  
         [0108]    In this embodiment, only script included in a print-condition setting file which designates a paper size supported by a printer is read out and registered. However, even though a paper size designated by a print-condition setting file is not exactly the same as a paper size supported by a printer, a script included in the print-condition setting file may be read out and registered if aspect ratios of these paper sizes are not so different.  
         [0109]    Namely, when a printer supports a paper size of A4 size (JIS definition), a script included in a print-condition setting file which designates a paper size other than the A4 size may be read out if the paper size designated by the print-condition setting file is included in A-series or B-series in the JIS definition whose aspect rate is not so different from an aspect rate of A4 size.  
         [0110]    [0110]FIG. 12 shows a printer system according to a second embodiment of the invention. a printer  1  and a digital camera  3  are connected via a USB communication interface cable to form the print system. Of the printer and the digital camera connected together via the USB communication interface, for example, the printer is defined as a ‘USB host’ or a master in communication processing, whereas the digital camera is defined as a ‘USB device’ or a slave therein.  
         [0111]    Therefore, the digital camera  3  is not allowed to send commands to the printer  1  independently. Consequently, the printer  1  periodically issues and transmits an inquiry command to the digital camera  3 , whereas the digital camera  3  transmits a reply command to the printer  1  whereby to make a desired request.  
         [0112]    As shown in FIG. 12, the digital camera  3  comprises a camera controller  121  for totally controlling its own operation, a camera device  122  for taking photographs via a finder (not shown) to obtain image data, a memory card  2  for storing the image data obtained by the camera device  122 , and a USB device controller  123  for communicating with the printer  1  serves as the USB host.  
         [0113]    The camera controller  121  controls a user interface having various control buttons and a color liquid crystal panel, as shown in FIG. 13. The user interface of the digital camera  3  includes a power supply button  131  for switching on/off of a power supply, a dial switch  132  for setting modes such as photographing, replaying and direct print modes, a shutter button  133  for inputting a shutter command, a scene setting button  134  for setting the scene in the photographing mode, a zoom button  135  for setting zoom magnifications, a next selection key  136 , a previous selection key  137 , an enter key  138  and a color liquid crystal panel  139  for displaying image data on the photograph taken.  
         [0114]    The camera controller  121  drives the camera unit  122  in response to the shutter operation, performs photographic processing, stores image data thus obtained to the memory card  2 , and reads out the image data from the memory card  2  in response to a predetermined image-reference operation so as to control the display of the image data on the color liquid crystal panel  139 . Further, the camera controller  121  displays a print-condition setting screen on the color liquid crystal panel  139  in response to the print setting operation so as to control over the provision of interactive operating environment.  
         [0115]    The USB device controller  123  serves as a storage class device which communicates with a USB host controller  124  in conformity to the USB standard. Consequently, the printer  1  as the USB host gains access to the memory card  2  as the device in the USB storage class and is allowed to read and write the image data (e.g., JPEG file) stored therein.  
         [0116]    The processing of setting print conditions in this embodiment will be described with reference to FIG. 14.  
         [0117]    The user give print-setting instructions to the printer  1  by operating the user interface of the digital camera  3  ((1) in FIG. 14). Upon receipt of the instructions, the printer  1  reads its own hardware specification data stored in the ROM  22  and sends the data as print-setting requests to the digital camera  3  via the USB communication interface.  
         [0118]    On receiving the print-setting request from the printer  1 , the digital camera  3  reads and interprets the print-condition setting files stored in the memory card  2  sequentially, extracts print-condition setting files conforming to the hardware specification of the printer  1  and provides the color liquid crystal panel  139  with the contents of each file as shown in FIG. 15. On receiving the contents of the files, the user pushes various operating buttons provided on the back of the digital camera  3  so as to select a desired print-condition setting file ((2) of FIG. 14). When the user selects the desired print condition setting file and operates the enter key  138 , the selected print-condition setting file is effected ((3) of FIG. 14). The operation of the decision key  138  in this case is equivalent to an instruction concerning the execution of printing under the print conditions shown by the settled print-condition setting file.  
         [0119]    When the decision key  138  is operated with the print-condition setting file thus settled, the digital camera  3  generates a print job file (print job data) and stores the file to the digital camera  3  ((4) in FIG. 14). The print job file is a file in which the contents of the print job are described in a predetermined format, for example, in a text mode. In the print job file, information indicative of relevancy to an image file in the form of JPEG corresponding to image data as printing objects and print conditions (e.g., the kind of paper, paper size, the number of printing copies, an image correcting method and so forth) together with information concerning relevancy to a layout defining file defining the page layout should preferably be described at least.  
         [0120]    When the instruction concerning the execution of printing is given to printer  1  from the digital camera  3 , the printer  1  reads the print job file independently from the memory card  2  attached to the digital camera  3  as the device in the USB storage class (( 5 ) in FIG. 14).  
         [0121]    The printer  1  is provided with an image processing section and a color conversion/binarizing section and on receiving the print job file from the digital camera  3 , the printer  1  interprets the file reads the JPEG image file that is the image data as a printing object by path information indicating the place of the image data as the printing object from the memory card  2  of the digital camera  3 . The printer  1  processes the JPEG image file thus read in into 8-bit RGB data per color in the image processing section and converts the data to image data for printing in the color conversion/binarizing section. Then the printer  1  does printing while controlling the print engine according to the image data ((6) in FIG.  14 ).  
         [0122]    According to this embodiment, the user interface of a peripheral device such as the digital camera  3  connected to the printer  1  via a communication interface such as a USB is employed so that the print-condition setting file of the printer  1  can be selected. In this case, the printer  1  gains access to a memory card  2  attached to the digital camera  3  instead of a memory card  2  to be attached to a card slot  13  and operates to perform the printing operation directly by selecting the print-condition setting file stored in the memory card of the digital camera  3 .  
         [0123]    Thus, the user interface of the digital camera  3  can be utilized for selecting the desired print-condition setting file stored in the memory card  2  even if the user interface of the printer  1  is provided with only necessary and sufficient functions to make the printer achieve the original display/selection objective of setting various print conditions.  
         [0124]    Further, printing can be done directly without the aid of a personal computer by generating the print job file in accordance with the print-condition setting file selected in the digital camera  3  and sending the file to the printer  1 . Particularly, since the digital camera  3  transmits a reply to the printer  1  in response to an inquiry command from the printer  1 , direct printing is achievable even in a case where the digital camera  3  is defined as a slave device of the printer  1  at the time communication processing is performed.  
         [0125]    Incidentally, this embodiment of the invention can be modified as follows: the image processing section and the color conversion/binarizing section may be provided in the digital camera  3  instead of the printer  1 . Further, the digital camera  3  need not be necessarily defined as a USB device. The digital camera  3  may be so arranged as to issue commands independently.  
         [0126]    Further, though the digital camera  3  is employed as an example of peripheral equipment, mobile telephones, portable remote terminals and so on are also applicable. The JPEG has been cited as an example of the data format of the image file but any other data format in the form of PNG may also employed.  
         [0127]    In addition, though the digital camera  3  is made to send data to the printer in the form of print job files, it may be so arranged as to send print job data in the form of commands, for example.