JP2000222077A - Optical disk unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such an optical disk unit capable of surely using an interface power supply. SOLUTION: This optical disk drive is used by being connected to a PC (personal computer) 105 discriminating whether it is possible to feed power to the outside through an external interface, can receive power fed from plural different power supplies, has a drive deciding means which identifies a command representing use permission for the power supply of an external interface among commands received from the PC 105, waits for identification results of the drive deciding means and drives the unit when it receives power fed through the external interface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to switching of a power supply input for operation of a small electronic device such as a portable small optical disk device.

[0002]

2. Description of the Related Art A portable optical disk apparatus connected to a PC or the like is used as a power supply of an AC using a commercial power supply.
Two types of power supplies were used: an adapter and a battery. Recently, in addition to these, there is a type that uses a power supplied from an external interface connection portion with a PC. This is usually realized by a configuration including a PC, an external interface device (hereinafter, a PC card and a connection cable), and an optical disk device.

[0003]

However, there are many general-purpose PC cards used in a connection portion with a PC, and in a portable optical disk device, an incompatible P card is used.
There is also a C card, that is, a PC card in which power supplied from the external interface connection unit cannot be used. As a result, various connections can be made, and a situation may occur where the interface power supply cannot be used as the optical disk device but is used as it is.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is used by connecting to a personal computer which determines whether or not power can be supplied to the outside via an external interface. An optical disk device capable of receiving power supply from a power supply, comprising: a drive determination unit for identifying a command indicating permission to use a power supply of an external interface among commands received from a personal computer; The optical disk device is characterized in that, when supplied, the optical disk device waits for the identification result of the drive determining means to drive the device.

With the above configuration, an object of the present invention is to provide an optical disk device which prevents starting of the optical disk device due to connection with an incompatible PC card and which can reliably use an interface power supply.

[0006]

According to the present invention, a personal computer for determining whether or not power can be supplied to an external device through an external interface is used to supply power from a plurality of different power sources. An optical disc device capable of receiving the power from the personal computer, the drive determining means for identifying a command indicating permission to use the power supply of the external interface among the commands received from the personal computer. An optical disk apparatus characterized in that the apparatus is driven after waiting for the identification result of the drive determining means.

It is determined whether or not the interface device connected to the interface on the PC side is capable of supplying interface power for the small electronic device with the configuration of the PC, the PC card, the connection cable, and the small electronic device. Determine whether it is a small electronic device that can be supplied and can be operated with the interface power supply,
When operable, the use of the interface power supply is given by transmitting, to the small electronic device, identification indicating that power can be supplied together with the interface command from the PC side.

[0008] The small electronic device receives the command,
It does not operate until it is determined whether the interface power supply can be used. The small electronic device notifies the internal drive waiting means of drive determination that the interface power supply determined from the received data is usable or unusable. The drive judging means performs the operation of driving the device if the identification is possible, and the operation of turning off the power otherwise.

Further, when the AC adapter and the battery are not valid or when the user intentionally uses the interface power supply, an attempt is made to switch to the interface power supply. At this time, the external interface power supply is provided by the power supply presence / absence information holding means, and the interface power supply is enabled by the interface power supply usable information holding means, and the interface power supply is usable by the interface power supply use determination means by the interface power supply usable switch. In this case, the interface power supply is selected for the first time, and if it is not available, the power is turned off.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is used by connecting to a personal computer for judging whether or not power can be supplied to the outside through an external interface. An optical disk device capable of receiving power supply from a power supply, comprising: a drive determination unit for identifying a command indicating permission to use a power supply of an external interface among commands received from a personal computer; The optical disk device is characterized in that, when supplied, the optical disk device waits for the identification result of the drive determining means to drive the device.

[0011] With the above configuration, it is possible to provide an optical disk device that can prevent activation of the optical disk device due to connection with an incompatible PC card and can reliably use an interface power supply.

An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment) FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is a configuration diagram of an optical disk device of the present invention, FIG. 3 is a flowchart for driving the optical disk device of FIG. 2, and FIG. FIG. 5 is a flowchart for notifying whether interface power can be used, FIG. 5 is a flowchart for determining whether interface power can be supplied, and FIG. 6 is a flowchart for transmitting interface power use permission.

As shown in FIG. 1, an optical disk apparatus main body 1
01 includes an AC adapter 102 and its connection unit, a battery 103 and its connection unit, and a connection unit with the external interface device 104. As one system,
It comprises an optical disk device main body 101, an external interface device 104, and a PC 105. A possible configuration in this embodiment is that the interface
API (AT Attachment Packet Interface) and SCSI
(Small Computer System Interface).

As shown in FIG. 2, the optical disk apparatus main body 1
01 is the interface power supply input unit 201 and the CPU 2
02, the optical disk reading unit 203, and the optical disk 2
04, an interface power use setting switch 205 for setting on the user side whether or not the interface power supply can be used in the optical disk device, and whether the state of the interface power use setting switch 205 is set to usable or unusable. Interface power use setting determining means 206 for reading and determining whether
A command return means 2 for receiving an instruction transmitted from the C via a PC card, performing an operation corresponding to the instruction, and returning a response corresponding to the instruction via the PC card;
07 and a command return means 207 after receiving the result of checking by checking whether the PC card is a PC card that can use the interface power supply and whether an optical disk device that can use the interface power supply is connected. Interface power availability determination means 208 for determining the result, interface power availability information holding means 209 for storing the determination result as to whether or not the PC card and the optical disk device may use the interface power, and interface power availability. An interface power use availability notification unit 210 for notifying the result determined by the determination unit 208 to the interface power use permission waiting unit 211, and a result whether the interface power is available is waited for, and the result comes. In interface supply grant wait means waits without driving the optical disc device 21
1 and an optical disk device drive determining unit 2 that determines whether the optical disk device can be driven based on the result notified by the interface power supply availability notification unit 210.
12 and an optical disk device driving unit 213 originally provided as an optical disk device and instructing the optical disk reading unit 203 to drive the optical disk device.

Next, the operation of the optical disk apparatus and each means in FIG. 2 will be described in detail with reference to FIGS.
FIG. 3 shows an interface power supply use setting determining unit 206.
Interface power use permission waiting means 211;
FIG. 4 shows the flow of processing of the optical disk device drive determining unit 212 and the optical disk device drive unit 213, and FIG.
08 and the interface power supply available information holding means 2
09 and interface power supply availability notification means 210
Is described.

First, the CPU 202 operates with the power input from the interface power input unit. CPU2
In step 02, initialization processing is performed on the optical disk reading unit 203 based on the programmed contents, and the type of the connected power supply is determined. Connectable power supply is AC adapter 1
02, the battery 103, and the power supply from the PC card 104. The priority order is the AC adapter 1
02> battery 103> power supply from PC card 104.

The processes described in FIGS. 3 and 4 are separate tasks, and the interface power use permission waiting means 211 and the interface power use availability notification means 2
10, communication between tasks is performed.

Referring to FIG. 3, the flow of processing related to the use of the interface power supply will be described. In step S31, it is checked whether the interface power supply is currently being used. If it is being used, the process proceeds to a determination process as to whether or not it can be used as it is. AC adapter 10 if not in use
2 or the battery 103, the drive of the optical disk device may be started. Therefore S37
Proceed to. In S32, it is read whether the state of the interface power supply use setting switch 205 is set to be usable or unusable, and it is determined which one is used. Based on the result of the determination, it is determined whether or not to operate as it is with the interface power supply. If the setting can be used, the process proceeds to S33. If the setting is not a usable setting, no further operation can be performed, so the process proceeds to S38, and the power of the optical disk device is turned off. Here, an example of using the interface power supply use setting switch 205 will be described. For example, if SCSI is used for the current interface standard, a termination process is performed in a terminating device to stabilize a normal communication signal in the SCSI standard. This is provided as a switch (terminator switch) or connector on the user side.

In the embodiment shown in FIG. 1, if the communication signal is stable in the configuration of the optical disk device, the PC card, and the connection cable, the termination process can be eliminated. Therefore, this terminator switch can be used also as an interface power supply use setting switch. Turn off the terminator switch for the current configuration of the optical disk device, PC card and connection cable.
In addition, if the present optical disk device and other PC card and connection cable have the same configuration, by turning on the terminator switch, the interface power supply can be used only with the current optical disk device, the PC card and the connection cable. The terminator switch is turned ON because the optical disk device, other PC card, and the connection cable usually require a termination process. This is a setting that disables the interface power supply.

In step S33, the control waits for the use result of the interface power supply. Here, in addition to this, another judgment result, such as whether the door for removing the disk of the optical disk device was opened, whether the door after the disk was inserted was closed, whether the power switch was pressed, etc. I am able to judge. Therefore, in the next S34, it is determined whether or not the result is related to the use determination result of the interface power supply. If it is related to the interface power use determination result, the process proceeds to S36. If it does not relate to the determination result of the use of the interface power supply, the process proceeds to S35.

In step S35, a power source other than the current interface power source (AC adapter 102 or battery 103)
Is used. This is because even if the interface power supply is used at the start of the processing shown in FIG. 3, it is sufficiently considered that a power supply other than the interface power supply will be connected before S35 is reached. In this optical disk device, if a power supply other than the interface power supply is connected, it is determined to be used before the interface power supply, so if a power supply other than the interface power supply is used, the interface power supply is not used That is, the process proceeds to S37. If a power source other than the interface power source is not being used, the process waits for the result of determining whether to use the interface power source again.
Return to From these processes, an infinite loop is performed between S33 and S35, and the process does not proceed unless the use determination result of the interface power supply is obtained. In other words, a device that does not drive the optical disk device with the interface power supply is realized.

It is determined whether or not the optical disk device can be driven using the interface power supply based on the interface power supply use determination result obtained in S36. If the optical disk device can be driven, the process proceeds to S37, and the driving of the optical disk device, which is the original purpose, is started. After confirming that the interface power supply can be reliably used in the configuration of the optical disk device and the PC card, the optical disk device can be driven using the interface power supply. If the optical disk device should not be driven, the process proceeds to S38, and the power of the optical disk device is turned off.

Next, the processing flow of the command reply means 207, the interface power availability determination means 208, the interface power availability information holding means 209, and the interface power availability notification means 210 will be described with reference to FIG.

In step S401, a command transmitted from the PC via the interface is received and stored in a memory. In S402, it is checked whether the command is supported as an optical disk device. If the command is supported, the process proceeds to S403. If the command is not supported, the process proceeds to S408. In S403, it is determined whether the command is an interface power supply available notification command. The communication commands include commands whose functions are determined by communication standards and commands whose functions can be freely set and used by a device development user (hereinafter, vendor-unique commands). The interface power available notification command belongs to the vendor unique command. The vendor unique command is a means (hereinafter referred to as driver software) for instructing the optical disk device to read out from the disk or return the status of the device.
And received by the optical disk device. For that reason,
It is necessary to determine the content of the command between the driver software and the optical disk device, and the optical disk device performs processing according to the specifications. Alternatively, if it is a previously determined vendor unique command, the return data of the optical disk device is matched with the command transmitted from the driver software. If the command is the interface power supply available notification command, the process proceeds to S404; otherwise, the process proceeds to S405.

In step S404, a comparison is made as to whether the identification character string transmitted from the driver software by the interface power supply available notification command has predetermined contents. S
At 405, processing of commands other than the interface power supply enable notification command is performed. The result of the comparison in S406 is determined, and if it matches the identification character string, the process proceeds to S407, and if not, the process proceeds to S408. In step S407, the interface power supply usable information is stored. Thereafter, the determination as to whether the interface power supply may be used is made by referring to this information. In step S408, the received command is a command that is not supported by the optical disk device, and the command is not the content determined in advance by the interface power supply enable notification command. Notify the result. Here, the result for the command is an error,
Terminates command processing.

In step S409, it is determined whether the interface power supply is currently being used, that is, whether the interface power supply use determination result is waiting in step S33. If the interface power supply is in use, S41
Go to 0. If it is not in use, since the AC adapter 102 or the battery 103 is being used, it is not in a state of waiting for the use determination result of the interface power supply in S33. Therefore, there is no need to notify the result that the interface power supply may be used, and the command processing ends.

In step S410, a result indicating that the interface power supply may be used is notified to S33. At this point, the actual operation as the optical disk device using the interface power supply becomes possible for the first time, and the command processing ends. The optical disk device performs drive initialization, which is the subsequent processing, in which the drive is driven and its contents are checked.

Next, the flow of processing until the driver software on the PC side notifies the optical disk device of the identification that the interface power supply can be used will be described with reference to FIG.

FIG. 5 is a flowchart of a procedure for determining whether interface power can be supplied, and is a diagram showing a flow of processing until it is determined whether the PC card is a device that can supply interface power. FIG. 6 is a flowchart of an interface power supply use permission transmission. When the PC card is a device that can supply power to the optical disk device from the external interface connection unit, it is determined whether the optical disk device is a device that can use the interface power supply. FIG. 7 is a diagram showing a flow of processing until transmission of information indicating that an interface power supply may be used when the device is usable. In FIG. 5, S51
Read the ID of the PC card with. An ID is pre-written on the PC card so that the type of the card can be known. In S52, it is determined whether or not the ID of the PC card can supply the interface power. If the IDs are equal, the card can supply interface power, so the process proceeds to S53, and if not, the process ends. In S53, a flag is set to indicate that the card can supply interface power. Thereafter, when issuing a vendor unique command for transmitting that the interface power supply may be used to the optical disk device, it is an essential condition that this flag is set.

In FIG. 6, it is determined in step S54 whether a flag indicating that the card can supply interface power is set. If so, the process proceeds to S55, and if not, it is determined that another PC card is connected, and the process ends. In S55, SCSI INQUIRY which is a command for checking configuration information and attributes of a connected device, which is a condition for transmitting a vendor unique command for transmitting that an interface power supply may be used to the optical disk device as a command to be issued from now on, is used. Determine if it is a command. Since the driver software can obtain the product ID of the connected device by the INQUIRY command, it is possible to determine whether or not an optical disk device that can use the interface power supply is connected. S56 if INQUIRY command
Otherwise, the process ends because there is no need to issue a vendor unique command for transmitting that the interface power supply may be used for the optical disk device.

In S56, it is determined whether the INQUIRY command has been completed normally. This is because whether or not the command transmission / reception has been performed without any problem is determined by checking beforehand whether communication can be performed without any problem even if a vendor unique command for transmitting that the interface power supply can be used to the optical disk device is issued. Is what it is. If the processing has been completed normally, the process proceeds to step S57. If the processing has not been completed normally, the process ends.

In S57, it is determined whether or not the product ID of the optical disk device connected is an optical disk device that can use the interface power supply. When adding an optical disk device that can use an interface power supply supported by the driver software, the number of target devices can be increased by adding a product ID that is compared and determined here.
If they are equal, the process proceeds to S59, and if they are not equal, the process ends.

In step S58, a vendor unique command for transmitting that the interface power supply may be used is issued. This command usually transmits a character string (identification) that is assumed not to match the content used in other commands. The optical disk device receives this command, analyzes the command content, checks whether the command content is the intended content, and then drives the drive.

[0035]

As described above, according to the optical disk apparatus of the present invention, the P connected to the interface on the PC side is used.
It is determined whether the C card is a PC card capable of supplying interface power or an optical disk device operable with the interface power, and in that case, the PC transmits that the interface power may be used to the optical disk device. By transmitting the vendor unique command, use permission of the interface power supply is given to the optical disk device. The optical disk device receives the command, determines whether the interface power supply can be used, and drives the optical disk device only after determining that the interface power supply can be used. As a result, an incompatible PC card, that is, a connection between an optical disk device and a PC card that cannot use an interface power supply, for example, a connection between a desktop PC and the optical disk device or a connection between another PC card and the optical disk device in a notebook PC And can be operated only when the interface power supply can be used reliably.

[Brief description of the drawings]

FIG. 1 is a configuration diagram according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of an optical disk device of the present invention.

FIG. 3 is a flowchart for driving the optical disk device of FIG. 2;

FIG. 4 is a flowchart for notifying whether or not the interface power supply can be used;

FIG. 5 is a flowchart of a procedure for determining whether interface power can be supplied.

FIG. 6 is a flowchart of an interface power supply use permission transmission.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 Optical disk apparatus main body 102 AC adapter 103 Battery 104 PC card (external interface device) 105 PC (personal computer) 201 Interface power supply input unit 202 Control CPU 203 Optical disk readout unit 204 Optical disk 205 Interface power use setting switch 206 Interface power use setting determination means 207 Command return means 208 Interface power availability determination means 209 Interface power availability information holding means 210 Interface power availability availability notification means 211 Interface power usage permission waiting means 212 Optical disk drive drive determination means 213 Optical disk drive drive means

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hidehito Nakamura 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 5B011 DA02 DA06 DB22 DB26 EA02 EB03 EB06 MB11

Claims (1)

[Claims] An optical disk device which can be connected to a personal computer for determining whether or not power can be supplied to an external device via an external interface and which can receive power from a plurality of different power sources. And a drive judging means for identifying a command indicating permission to use the power supply of the external interface among the commands received from the personal computer, and when power is supplied via the external interface, the identification result of the drive judging means is provided. An optical disk device wherein the device is driven after waiting.