JP2002044184A - Communication system for mobile devices - Google Patents

Abstract

(57) [Problem] To provide a communication system of a portable device which can simplify a preparation operation for performing data communication and can easily transfer data even when the portable device is connected to an unspecified personal computer. . The portable device includes a portable device, a personal computer, and an interface adapter that enables data communication between the portable device and the personal computer. The file system emulation unit 22 of the portable device 11 makes the personal computer 13 view the data stored in the storage unit 21 as if it were managed in a format applied to a disk that can be recognized by the personal computer 13. Then, the interface adapter 23 behaves as a disk-exchangeable external storage device, and the portable device 11 behaves as a disk of the external storage device.
The personal computer 13 accesses data in the storage unit 21 of the portable device 11 so as to read and write data in the external storage device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a communication system of a portable device for performing data communication between a portable device such as a portable information terminal and a portable telephone and a personal computer.

[0002]

2. Description of the Related Art Conventionally, as a communication system of a portable device, an RS communication between a portable device and a personal computer is performed.
Some systems use a serial communication line such as the 232C standard (American Electronic Industries Association) to transfer data mutually. In this portable device communication system, a communication cable is connected between the portable device and the personal computer, and data from the portable device is transmitted in accordance with communication software activated in the personal computer with the portable device set to the communication mode. Upload to a personal computer or download data from a personal computer to a portable device.

[0003]

However, in the communication system of the portable device, before performing data communication between the personal computer and the portable device, software for communicating with the portable device is previously installed on the personal computer. Must be activated
There is a problem that a preparation operation for performing data communication is very troublesome.

Further, in order to perform data communication between a personal computer and a portable device, software for communicating with the portable device must be installed on the personal computer. Therefore, when the user wants to transfer data to a personal computer while away from home, the data transfer is not possible because the corresponding software is not installed on the personal computer, or a function that can communicate with a public line such as a mobile phone is provided. There is a problem in that a troublesome operation of transferring data via electronic mail is forced in a certain portable device.

Therefore, an object of the present invention is to eliminate the need for installing software for performing data communication between a personal computer and a portable device on the personal computer, simplifying the preparation operation for performing the data communication, and improving the portability. An object of the present invention is to provide a communication system of a portable device that can easily transfer data even when the device is connected to an unspecified personal computer.

[0006]

In order to achieve the above object, a communication system of a portable device according to the present invention enables data communication between a portable device, a personal computer, and the portable device and the personal computer. In a communication system of a portable device provided with an interface adapter, the personal computer includes an interface unit (hereinafter, I / O) to which an external storage device can be connected.
The interface adapter includes a personal computer-side I / F unit that can be connected to the I / F unit of the personal computer, and a portable device-side I / F unit that can be connected to the portable device. The portable device has a portable device side I / O of the interface adapter.
An I / F unit connectable to the F unit, a storage unit storing data, and data stored in the storage unit managed in a format applied to a storage medium recognizable by the personal computer. And a file system emulation section that makes the personal computer appear as described above, and the interface adapter acts as the external storage device capable of exchanging a storage medium, and the portable device acts as a storage medium of the external storage device. Thus, the personal computer accesses data in the storage unit of the portable device so as to read and write data in the external storage device.

According to the communication system of the portable device having the above configuration, when the I / F section of the personal computer is connected to the I / F section on the personal computer side of the interface adapter, the interface adapter becomes one of the external storage devices of the personal computer. Will be recognized as
When the I / F unit of the mobile device is connected to the I / F unit of the interface adapter, the file system emulation unit of the mobile device refers to the data stored in the storage unit and performs conversion. Format information indicating a format applied to a storage medium (such as a floppy (registered trademark) disk) to be used. Then, based on the generated format information, commands and data are appropriately bridged so that data communication is performed between the personal computer and the portable device. Therefore, it is not necessary to install software for performing data communication between the personal computer and the portable device on the personal computer, thereby simplifying the preparation operation for performing data communication and connecting the portable device to an unspecified personal computer. However, data transfer can be easily performed.

In one embodiment of the present invention, in the communication system of a portable device, the file system emulation section of the portable device converts the format into a format applicable to a plurality of types of storage media. And a changeover switch for selecting a format type applied to the storage medium.

According to the communication system of the portable device of the embodiment, the portable device is applied to a storage medium which is converted by a file system emulation unit of the portable device based on a set state of a changeover switch. Determine the format type to use.

In one embodiment of the present invention, the communication system of the portable device is configured to detect whether or not the I / F unit of the portable device is connected to the portable device side I / F unit of the interface adapter. Upon detecting that the I / F section is connected to the portable device side I / F section of the interface adapter, the file system emulation section allows the personal computer to recognize the data stored in the storage section. It is characterized in that the personal computer looks as if it were managed in a format applied to the storage medium.

According to the communication system of the portable device of the above embodiment, when the portable device side I / F portion of the interface adapter is connected to the I / F portion of the portable device, the I / F portion of the portable device becomes the interface adapter. Since the connection to the portable device side I / F unit is detected and the file system emulation unit of the portable device is activated, it is not necessary to separately operate the portable device and the interface adapter after the connection, and the operability is improved. improves.

A communication system for a portable device according to the present invention is a communication system for a portable device comprising a portable device, a personal computer, and an interface adapter for enabling data communication between the portable device and the personal computer. In the system, the personal computer has an I / F unit to which an external storage device can be connected, and the portable device has an I / F unit connectable to a portable device-side I / F unit of the interface adapter; The interface adapter includes a personal computer side I / F unit connectable to the personal computer I / F unit, and a portable device side I / F connectable to the portable device. Reference is made to data stored in the storage unit of the portable device via the F unit and the I / F unit on the portable device side. A file system emulation section for causing the personal computer to present the data in a format applied to a storage medium recognizable by the personal computer, wherein the interface adapter exchanges the storage medium. By acting as the possible external storage device and the portable device acting as a storage medium of the external storage device, the data of the storage unit of the portable device can be read and written by the personal computer. It is characterized by accessing.

According to the communication system of the portable device of the above embodiment, when the personal computer side I / F of the interface adapter is connected to the personal computer I / F, it is recognized as one of the external storage devices of the personal computer. You. Further, when the interface unit of the portable device and the I / F unit of the portable device are connected, the file system emulation unit of the interface adapter transmits the data stored in the storage unit of the portable device. With reference to the format information, a format information representing a format applied to the storage medium (floppy disk or the like) to be converted is generated. Then, based on the generated format information, the interface adapter
Commands and data are appropriately bridged so that data communication is performed between the personal computer and the portable device. Therefore, it is not necessary to install software for performing data communication between the personal computer and the portable device on the personal computer, thereby simplifying the preparation operation for performing data communication and connecting the portable device to an unspecified personal computer. However, data transfer can be easily performed.

In one embodiment of the present invention, in the communication system for portable equipment, the file system emulation section of the interface adapter converts the format into a format applicable to a plurality of types of storage media. And a changeover switch for selecting a format type applied to the storage medium.

According to the communication system of the portable device of the embodiment, the interface adapter is configured to convert the format of the disk to be converted by the file emulation unit of the interface adapter based on the state of the set switch. Is determined.

In one embodiment, a communication system of a portable device includes a portable device side I / O of the interface adapter.
The F unit detects whether or not a connection has been made to the I / F unit of the portable device, and detects whether the interface adapter is connected to the portable device side I / F.
Upon detecting that the / F unit is connected to the I / F unit of the portable device, the file system emulation unit applies the data stored in the storage unit to a storage medium that can be recognized by the personal computer. It is characterized in that it is shown to the personal computer as if it were managed in the format format that is used.

According to the portable device communication system of the above embodiment, when the portable device side I / F portion of the interface adapter is connected to the I / F portion of the portable device, the portable device side I / F portion of the interface adapter is connected. Is detected to be connected to the I / F unit of the portable device, and the file system emulation unit of the interface adapter is activated. Therefore, it is not necessary to separately operate the portable device and the interface adapter after the connection. improves.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a communication system of a portable device according to the present invention.

(First Embodiment) FIG. 1 is a schematic configuration diagram of a communication system of a portable device according to a first embodiment of the present invention.
11 is a portable device, 12 is an interface adapter, 1
Reference numeral 3 denotes a personal computer, and FIG. 2 is a block diagram of a communication system of the portable device according to the first embodiment.

As shown in FIG. 2, the portable device 11 comprises:
A storage unit 21 which is a readable and writable static memory in which data is stored, and format information conforming to a format format applied to a disk (floppy disk, magneto-optical disk, etc.) as a storage medium are generated, and the interface adapter 12 generates A file system emulation unit 22 for interpreting a data read or write command to access the storage unit 21; an I / F unit 23 connected to the interface adapter 12 and having connection detection means; Upon receiving the connection detection notification from the F unit 23, the file system emulation unit 2
And a control unit 24 for controlling the operation of the control unit 2.

The interface adapter 12
Is connected to the portable device 11 and is connected to the portable device-side I / F unit 25 having connection detecting means and the personal computer 13, and is connected to the SCSI (Small Computer System Int.).
erface), IDE (IntelligentDrive Electronics), US
B (Unversal Serial Bus) and IEEE (Institute of
Electrical and Electronics Engineers) It is a personal computer side I / F section 26 which is a general-purpose interface such as 1394, and a controller of the portable device side I / F section 25 and the personal computer side I / F section 26. A control unit 27 for holding device information as an apparatus.

The personal computer 13
Has an I / F unit 28 connected to the personal computer side I / F unit 26 of the interface adapter 12.

In the mobile communication system having the above-described configuration, first, the interface adapter 12 is connected to the personal computer 13, and then device information inside the interface adapter 12 is sent to the personal computer 13. Is recognized as an external storage device.

Thereafter, the I / F unit 23 of the portable device 11 and the I / F unit 25 of the interface adapter 12 on the portable device side.
And connect. The I / F unit 23 of the portable device 11 and the portable device side I / F unit 25 of the interface adapter 12
Has a plurality of control lines, and two of the control lines are used for connection detection. One of the two is a control line from the portable device 11 to the interface adapter 12, and the other is a control line from the interface adapter 12 to the portable device 11.
To the control line. Normally, both the portable device 11 and the interface adapter 12 set the voltage of the control line to be output to a high level and the input control line to a low level. In this state, the portable device 11 and the interface adapter 12
Is connected, the input control line changes from a low level to a high level, and the control unit 24 and the control unit 27
Causes the portable device 11 and the interface adapter 12 to detect the connection.

In the control unit 24 of the portable device 11, when an interrupt indicating connection detection occurs, the file system emulation unit 22 starts.

FIG. 8 is a flowchart showing the operation of the activated file system emulation unit 22. The operation of the file system emulation unit 22 will be described below with reference to FIG.

First, the file system emulation unit 2
When 2 starts, the storage unit 21 is referred to in step S11.

At this time, the type (name), area (size), and the like of the data existing in the storage unit 21 are read, and the format is determined in steps S12 to S14, which will be described later, in accordance with the format applied to the disc that can be converted by the portable device 11. Generate information. At this time, one format format that can be converted by the portable device 11 is determined in advance, and the format information is generated by dividing the physical memory of the storage unit 21 into sectors and clusters, virtually assuming a physical disk.

That is, in step S12, a correspondence table of physical memory addresses and virtual sectors and clusters is generated. In step S13, a file allocation table is created. In step S14, root directory information is created. The file allocation table and the root directory information are stored.

Here, it is assumed that an address book, a schedule table, and image data are stored in the storage unit 21 as shown in Table 1, and the personal computer 13 is formatted with 4096 bytes per cluster. I will show you.

[0031]

[Table 1]

The correspondence table between the file allocation table and the physical memory address is as shown in Table 2.
It is only necessary to assign clusters in ascending order continuously from the one with the smallest physical memory address.

[0033]

[Table 2]

FIG. 6 shows the file allocation table.
As shown in (1), once the correspondence table between the file allocation table and the physical memory address is determined, it is inevitable.
The hexadecimal number FFF in FIG. 6 indicates the end of the file. The root directory information is as shown in FIG.
In the part storing the file name, a character string prepared in advance according to the type of stored data may be used, and the extension also uses a character string prepared in advance,
Or it may not be present (may be padded with zeros). Also, a fixed value may be prepared in advance for the attribute. For the update time and date, the update time and date of the corresponding data may be used, and if there is no attribute, a fixed value may be used. Further, the head cluster is uniquely determined by the file allocation table generated together, and the file size can be calculated from the stored physical memory address.

As described above, in the communication system of the portable device, it is not necessary to install software for performing data communication between the personal computer 13 and the portable device 11 in the personal computer 13, and a preparation operation for performing the data communication is performed. Can be simplified, and data can be easily transferred even when the portable device 11 is connected to an unspecified personal computer.

(Second Embodiment) FIG. 3 is a block diagram showing a communication system of a portable device according to a second embodiment of the present invention. The communication system of the mobile device has the same configuration as the communication system of the mobile device of the first embodiment except for a changeover switch, and the same components are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 3, the communication system of the portable device includes a portable device 111, an interface adapter 12, and a personal computer 13.

In the portable device communication system having the above-described configuration, the file system emulator 22 converts the data into a format applicable to a plurality of types of disks by the changeover switch 31 of the portable device 1.

FIG. 9 shows a flowchart relating to the file system emulator 22.

First, the file system emulation unit 2
When 2 is started, the control unit 24 reads the value of the changeover switch 31 in step S21, and determines the format format applied to the disc to be converted according to the value.

Next, the storage unit 21 is referred to in step S22.

At this time, the type (name), area (size), etc. of the data existing in the storage unit 21 are read, and the portable device 111 is read.
The format information is generated in steps S23 to S25 described later in accordance with the format format applied to the disc that can be converted. When generating this format information, the physical memory of the storage unit 21 is virtually divided into sectors and clusters by regarding the physical memory as a disk.

That is, in step S23, a correspondence table of physical memory addresses and virtual sectors and clusters is generated.
In step S24, a file allocation table is created, and in step S25, root directory information is created, and its correspondence table, file allocation table, and root directory information are held.

The portable device communication system of the second embodiment has the same effects as the first embodiment, and is used in the personal computer 13 by operating a changeover switch 31 for selecting a format type. It is possible to select the format format applied to the disc suitable for the operating system.

(Third Embodiment) FIG. 4 is a block diagram showing a communication system of a portable device according to a third embodiment of the present invention. As shown in FIG. 4, the communication system of the portable device includes a portable device 211 and an interface adapter 11.
2 and a personal computer 13.

As shown in FIG.
Is a storage unit 21 which is a readable and writable static memory for storing data, and an interface adapter 1
I / F unit 23 connected to connection 12 and having connection detection means
And the notification of the connection detection from the I / F unit 23,
A control unit 24 for controlling the operation of the file system emulation unit 22.

The interface adapter 112
Is a portable device-side I / F unit 25 that is connected to the portable device 211 and has a connection detecting unit;
3, SCSI, IDE, USB and IEEE
A personal computer-side I / F section 26, which is a general-purpose interface such as 1394,
A control unit 27 which is a controller of the F unit 25 and the personal computer side I / F unit 26 and holds device information as an external storage device; and a portable device side I / F unit 25
Data from the portable device 211, and generates format information conforming to the format applied to the disc to be converted.
3 has a file system emulation unit 22 that interprets a data read or write command and exchanges data, and a storage unit 41 that stores data downloaded from the portable device 211.

Then, the personal computer 13
It has an I / F section 28 connected to the personal computer side I / F section 26 of the interface adapter 112.

In the portable communication system having the above configuration, first, the interface adapter 112 is connected to the personal computer 13. After the connection, the device information inside the interface adapter 112 is sent to the personal computer 13, and the interface adapter 1
Reference numeral 12 is recognized by the personal computer 13 as an external storage device.

After that, the I / F unit 23 of the portable device 211 and the portable device-side I / F unit 25 of the interface adapter 112 are connected. I / F section 23 of portable device 211
And I / F of interface adapter 112 on mobile device side
The unit 25 has a plurality of control lines, and two of the control lines
Use the book for connection detection. One of the two is a portable device 2
11 as a control line for the interface adapter 112, and another one for the interface adapter 112.
2 to the control line for the portable device 211. Normally, both the portable device 211 and the interface adapter 112 set the voltage of the control line to be output to a high level and the input control line to a low level. When the portable device 211 and the interface adapter 112 are connected in this state, the input control line changes from a low level to a high level, and the change causes interrupts in the control unit 24 and the control unit 27, respectively. And the interface adapter 112 detect that they are connected to each other.

FIG. 10 shows a flowchart relating to the file system emulation section 22.

In the control unit 27 of the interface adapter 112, when an interrupt indicating connection detection occurs,
The file system emulation unit 22 is activated, and the portable device 2 is passed through the portable device side I / F unit 25 in step S31.
A data reading request is made to the storage unit 41, and the data is received and stored in the storage unit 41 in step S32.

Next, the data stored in the storage section 41 in step S33 is referred to.

At this time, the type (name), area (size), and the like of the data existing in the storage unit 41 are read, and the format is determined in steps S34 to S36 to be described later in accordance with the format applied to the disc that can be converted by the portable device 211. Generate information. The format that can be converted by the portable device 211 is previously determined to be one. When generating the format information, the physical memory of the storage unit 41 is virtually divided into sectors and clusters by treating the physical memory as a disk.

That is, in step S34, a correspondence table of physical memory addresses and virtual sectors and clusters is generated. In step S35, a file allocation table is created. In step S36, root directory information is created. The allocation table and the root directory information are stored.

Here, it is assumed that the address book, the schedule table, and the image data are stored in the storage unit 41 as shown in Table 1 above, and the personal computer 13 is formatted with 4096 bytes per cluster. I will show you. As shown in Table 2 above, the correspondence table between the file allocation table and the physical memory addresses may be such that clusters are assigned sequentially in ascending order from the smallest physical memory address.

As shown in FIG. 6, the file allocation table is inevitably determined when a correspondence table between the file allocation table and the physical memory address is determined. The hexadecimal number FFF in FIG. 6 indicates the end of the file. As the root directory information, as shown in FIG. 7, a character string prepared in advance according to the type of stored data may be used for a part for storing a file name, and an extension is similarly prepared in advance. The character string may or may not be used (may be padded with zeros). Also, a fixed value may be prepared in advance for the attribute. For the update time and date, the update time and date of the corresponding data may be used, and if there is no attribute, a fixed value may be used. Further, the head cluster is uniquely determined by the file allocation table generated together, and the file size can be calculated from the stored physical memory address.

When a data read command is received from the personal computer 13, the data to be read is specified by referring to the file allocation table in the format information, and the correspondence between the physical memory address of the storage unit 41, the virtual sector, and the cluster is specified. Read data based on table. Further, before disconnecting the portable device 211 and the interface adapter 112, the contents of the storage unit 41 are written back to the portable device 211.

As described above, in the communication system of the portable device, it is not necessary to install the software for performing the data communication between the personal computer 13 and the portable device 211 in the personal computer 13, and the preparation operation for the data communication is performed. Can be simplified, and data can be easily transferred even when the portable device 211 is connected to an unspecified personal computer.

(Fourth Embodiment) FIG. 5 is a block diagram showing a communication system of a portable device according to a fourth embodiment of the present invention. The communication system of the mobile device has the same configuration as the communication system of the mobile device of the third embodiment except for a changeover switch, and the same components are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 5, the mobile device communication system includes a mobile device 211, an interface adapter 212, and a personal computer 13.

In the communication system of the portable device having the above configuration, the file system emulation unit 22 of the interface adapter 212 converts the data into a format applicable to a plurality of storage media disks (floppy disk, magneto-optical disk, etc.). Control unit 2 with functions
7, the value of the changeover switch 43 is read, and the format format applied to the disc to be converted is determined according to the value.

FIG. 11 shows a flowchart relating to the file system emulation section 22. This file system emulation unit 22 determines in step S41
After reading the changeover switch 43, steps S31 to S36 in the flowchart shown in FIG. 10 of the third embodiment.
The same processing is performed.

The mobile communication system of the fourth embodiment has the same effects as the third embodiment, and is used in the personal computer 13 by operating the changeover switch 43 for selecting the format type. It is possible to select the format format applied to the disc suitable for the operating system.

In the above embodiment,

[0066]

As is clear from the above, according to the communication system for portable equipment of the present invention, the interface (SCSI, I / O) generally used in a personal computer is used.
DE, USB, IEEE 1394, etc.), and applied to a disk (storage medium) used in a personal computer based on data stored in a storage unit of the portable device by the file system emulation unit of the portable device. By generating the format information suitable for the format format to be used, the data of the portable device can be accessed from the personal computer in the same manner as the access to the external storage device. This eliminates the need for dedicated software that was previously required to perform data communication between a personal computer and a portable device. Further, since the personal computer accesses an external storage device in the same manner, the operating system needs You can access your mobile device with the included file manager, which you can use in a familiar way.

Further, according to the communication system of the portable device, the format format applied to the disc suitable for the operating system used in the personal computer is selected by operating the switch for selecting the format format. be able to.

Further, according to the communication system of the portable device, it is detected that the I / F unit of the portable device is connected to the portable device side I / F unit of the interface adapter.
By activating the file system emulation unit of the portable device, operability is improved.

Further, according to the communication system for portable equipment of the present invention, interfaces (SCSI, IDE, USB and I / O) generally used in personal computers are used.
EEE1394, etc.) and a file system emulation unit of the above interface adapter, based on data stored in the storage unit of the portable device, into a format applied to a disk (storage medium) used in a personal computer. By generating the appropriate format information, the data of the portable device can be accessed from the personal computer in the same manner as the access to the external storage device. This eliminates the need for dedicated software that was previously required to perform data communication between a personal computer and a portable device. Further, since the personal computer accesses an external storage device in the same manner, the operating system needs You can access your mobile device with the included file manager, which you can use in a familiar way. Further, when a format format applied to an unknown disk appears, there is an advantage that it can be dealt with only by exchanging only the interface adapter.

Further, according to the communication system of the portable device, by operating the changeover switch for selecting the format format, the format format applicable to the disc suitable for the operating system used in the personal computer can be selected. .

According to the communication system for the portable device, the portable device side I / F of the interface adapter is provided.
Section is connected to the I / F section of the portable device,
By activating the file system emulation section of the interface adapter, operability is improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a connection state between a portable device and a personal computer in a communication system for a portable device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a communication system of the portable device.

FIG. 3 is a block diagram showing a configuration of a communication system of a portable device according to a second embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a communication system of a portable device according to a third embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a communication system of a portable device according to a fourth embodiment of the present invention.

FIG. 6 is a diagram showing a file allocation table generated based on an example of data stored in a mobile device.

FIG. 7 is a diagram showing root directory information generated based on an example of data stored in a mobile device.

FIG. 8 is a flowchart showing the operation of the file system emulation unit of the first embodiment.

FIG. 9 is a flowchart showing the operation of the file system emulation unit of the second embodiment.

FIG. 10 is a flowchart showing the operation of the file system emulation unit of the third embodiment.

FIG. 11 is a flowchart showing the operation of the file system emulation unit of the fourth embodiment.

[Explanation of symbols]

 11, 111, 211: Portable device, 12, 112, 212: Interface adapter, 13: Personal computer, 21, 41: Storage unit, 22, 42: File system emulation unit, 23, 28: I / F unit, 24 27, a control unit; 25, a portable device-side I / F unit; 26, a personal computer-side I / F unit;

Claims (6)

[Claims] 1. A communication system for a portable device comprising: a portable device; a personal computer; and an interface adapter that enables data communication between the portable device and the personal computer. An interface unit connectable to a device, the interface adapter includes a personal computer-side interface unit connectable to the personal computer interface unit, and a portable device-side interface unit connectable to the portable device; The portable device includes an interface unit connectable to the portable device-side interface unit of the interface adapter, a storage unit storing data, and the personal computer recognizing the data stored in the storage unit. A file system emulation section for showing the personal computer as managed in a format applied to a readable storage medium, wherein the interface adapter acts as the external storage device capable of exchanging a storage medium. The portable device acts as a storage medium of the external storage device, so that the personal computer accesses data in the storage unit of the portable device so as to read and write data in the external storage device. Equipment communication system. 2. The communication system for a portable device according to claim 1, wherein the file system emulation unit of the portable device converts the format into a format applicable to a plurality of types of storage media, A communication system for a portable device, comprising: a changeover switch for selecting a format applied to a plurality of types of storage media. 3. The mobile device communication system according to claim 1, wherein the interface unit of the mobile device detects whether or not the interface unit is connected to a mobile device side interface unit of the interface adapter. When detecting that the interface unit of the interface adapter is connected to the portable device side interface unit of the interface adapter, the file system emulation unit stores the data stored in the storage unit in a storage medium that can be recognized by the personal computer. A communication system for a portable device, wherein the communication system is displayed on the personal computer as managed in an applicable format. 4. A communication system for a portable device comprising: a portable device; a personal computer; and an interface adapter that enables data communication between the portable device and the personal computer. The portable device has an interface unit connectable to a portable device-side interface unit of the interface adapter, and a storage unit for storing data; A personal computer-side interface unit connectable to the personal computer interface unit, a portable device-side interface unit connectable to the portable device, and the portable device-side interface unit via the portable device-side interface unit. A file system emulation unit that refers to the data stored in the storage unit and presents the data to the personal computer so that the data is managed in a format applied to a storage medium that can be recognized by the personal computer. The interface adapter acts as the external storage device capable of exchanging a storage medium, and the portable device acts as a storage medium of the external storage device, so that the personal computer reads and writes data in the external storage device. A mobile device communication system, wherein data in the storage unit of the mobile device is accessed. 5. The communication system for a portable device according to claim 4, wherein the file system emulation unit of the interface adapter converts the data into a format format applicable to a plurality of types of storage media. A communication system for a portable device, comprising: a changeover switch for selecting a format applied to a plurality of types of storage media. 6. The communication system for a portable device according to claim 4, wherein the interface unit on the portable device side of the interface adapter detects whether or not the interface unit is connected to the interface unit of the portable device. Upon detecting that the portable device side interface unit of the portable device is connected to the interface unit of the portable device, the file system emulation unit stores the data stored in the storage unit in a storage medium recognizable by the personal computer. A communication system for a portable device, wherein the communication system is displayed on the personal computer as managed in an applicable format.