CN1214390C

CN1214390C - CD driver sharing switching device and method and its application system

Info

Publication number: CN1214390C
Application number: CN 02108209
Authority: CN
Inventors: 石威; 赖宗志
Original assignee: Via Technologies Inc
Current assignee: Via Technologies Inc
Priority date: 2002-03-27
Filing date: 2002-03-27
Publication date: 2005-08-10
Anticipated expiration: 2022-03-27
Also published as: CN1384502A

Abstract

The present invention relates to a CD driver sharing switching device and a method and an application system thereof. The optical drive sharing switching device is an information appliance integrated a personal computer and an optical disc player into a whole, wherein the personal computer and the optical disc player share an optical drive, and therefore, a user can optionally switch the optical drive and the online of the personal computer and the optical disk player according to will, and however, in the switching process, a heavy and complicated switching program is not needed, and the normal work status of the personal computer with or without the optical drive can be kept, but the personal computer dead halt can not occur.

Description

CD driver sharing switching device and method and application system thereof

Technical field

The invention relates to a kind of CD-ROM drive application system, and particularly relevant for a kind of CD driver sharing switching device and method and application system thereof.

Background technology

Because the prosperity of science and technology, make the information storage medium that progress fast also arranged, past, the magnetic-type Storage Media can say that use is the most extensive, now then reach the reason of preserving easily and use the disc storage medium in a large number, add the disc storage medium and also be accompanied by preferable visual and sound effects usually, so be equipped with the PC of CD-ROM drive for capacity is bigger, and use CD player to play high resolution image, be to become the indispensable product of information household appliances.

Yet, there is no integration PC and CD player now on the market in the product of one, more no-trump PC and CD player are integrated and are shared a CD drive (being commonly called as CD-ROM drive, hereinafter referred to as CD-ROM drive), to promote the information household appliances equipment of its ease of use.

Summary of the invention

The purpose of this invention is to provide a kind of CD driver sharing switching device and method and application system thereof, it can will for example be that PC and CD player are integrated in one, an and shared CD-ROM drive, and when PC loses CD-ROM drive, need not the overline switching on and shutting down, can keep the normal operating condition of PC in no CD drive.

For reaching above-mentioned and other purpose, the invention provides a kind of CD driver sharing switching device, in order to first to advance rank technology accessory packet interface (AdvancedTechnology Attachment with Packet Interface what for example be PC, hereinafter to be referred as the ATAPI interface) and the 2nd ATAPI interface of CD player between, switching is online with shared CD-ROM drive, and this device comprises: reset signal generation unit, look-at-me generation unit and switch control unit.Wherein, the reset signal generation unit meets the reset signal of ATAPI interface standard in order to generation; The look-at-me generation unit meets the continuous look-at-me of ATAPI interface standard in order to generation; And switch control unit couples reset signal generation unit and look-at-me generation unit, in order to when receiving switching command, switch the online of CD-ROM drive and an ATAPI interface and the 2nd ATAPI interface, and in handoff procedure, use above-mentioned reset signal, with the shared CD-ROM drive of resetting, wherein when switching to the 2nd ATAPI interface by an ATAPI interface, and need above-mentioned continuous look-at-me is inputed to an ATAPI interface, to keep the normal operating condition of PC in no CD drive.

This CD driver sharing switching device can be used in the CD-ROM drive shared system, this system comprises the PC that can use the CD-ROM drive reading of data in addition, and can use CD-ROM drive to play the CD player of videodisc sheet, at this moment, this CD driver sharing switching device more comprises a power control unit, in order to when the 2nd ATAPI interface by CD player switches to an ATAPI interface of PC, cut off the power supply of CD player, to reach the purpose of saving the energy and prolonging service life of equipment.CD-ROM drive wherein is a digital multi CD-ROM drive (Digital VersatilDisc), and the continuous look-at-me frequency of using is 230Hz.

The present invention provides a kind of CD-ROM drive to share changing method in addition, and in order between an ATAPI interface and the 2nd ATAPI interface, switching is online with CD-ROM drive, and the method comprises the following steps: at first to provide a reset signal that meets the ATAPI interface standard; Other provides a continuous look-at-me that meets the ATAPI interface standard; And when receiving switching command, switch the online of CD-ROM drive and an ATAPI interface and the 2nd ATAPI interface, and in handoff procedure, use above-mentioned reset signal, with the replacement CD-ROM drive, wherein when switching to the 2nd ATAPI interface, and need above-mentioned continuous look-at-me is inputed to an ATAPI interface by an ATAPI interface, with the equipment of keeping an ATAPI interface in the normal operating condition of no CD drive.

Wherein this CD-ROM drive is shared changing method, can more comprise when switching to an ATAPI interface by the 2nd ATAPI interface, cuts off the step of the power supply of the 2nd ATAPI interfacing equipment.

As shown in the above description, using a kind of CD driver sharing switching device provided by the invention in the information household appliances of sharing CD-ROM drive, can will for example be that PC and CD player are integrated in one then, and shares a CD-ROM drive.In addition, in handoff procedure, the utilization reset signal is with the replacement CD-ROM drive, make it can be PC after switching or CD player use, and when it switches to CD player when making that PC loses CD-ROM drive by PC, export continuous look-at-me to PC, make them need not the overline switching on and shutting down, can be maintained at the normal operating condition of no CD drive.

Description of drawings

Fig. 1 is a kind of CD driver sharing switching device and the application system figure thereof of the preferred embodiment according to the present invention;

Fig. 2 is a kind of CD-ROM drive shared system of the preferred embodiment according to the present invention, the synoptic diagram when CD-ROM drive is subordinate to PC;

Fig. 3 is a kind of CD-ROM drive shared system of the preferred embodiment according to the present invention, the synoptic diagram when CD-ROM drive switches to CD player by PC;

Fig. 4 is a kind of CD-ROM drive shared system of the preferred embodiment according to the present invention, the synoptic diagram when CD-ROM drive is subordinate to CD player;

Fig. 5 is a kind of CD-ROM drive shared system of the preferred embodiment according to the present invention, the synoptic diagram when CD-ROM drive switches to PC by CD player;

Fig. 6 is the look-at-me generation unit circuit diagram of the preferred embodiment according to the present invention;

Fig. 7 A is the reset signal generation unit circuit diagram of the preferred embodiment according to the present invention;

Fig. 7 B is the double-channel monostable edge-triggered device truth table of the preferred embodiment according to the present invention.

100: CD driver sharing switching device

110: switch control unit

120: the reset signal generation unit

130: the look-at-me generation unit

140: power control unit

150: CD player

160: CD-ROM drive

170: PC

Embodiment

As shown in Figure 1, it is a kind of CD driver sharing switching device and the application system figure thereof of the preferred embodiment according to the present invention.Show among the figure that this CD driver sharing switching device 100 comprises reset signal generation unit 120, look-at-me generation unit 130 and switch control unit 110, in addition, for reaching may command ATAPI interfacing equipment primary power, so that save the purpose of the energy, so the equipment that connects when the ATAPI interface is as the CD player 150 of present embodiment etc., in losing CD-ROM drive 160, during the equipment that promptly can't use, it also can more comprise a power control unit 140.Except that CD driver sharing switching device 100, also show the ATAPI interface CD-ROM drive of sharing 160 among the figure, and the PC 170 and CD player 150 of shared this CD-ROM drive 160, certainly, use this CD-ROM drive 160 in order to connect smoothly, this PC 170 also must be used the ATAPI interface with CD player 150, and when these equipment of integration, then can select this CD-ROM drive 160 and CD driver sharing switching device 100 are selected to be integrated in the CD player 150, or be integrated in the PC 170, become the information household appliances of integration.CD-ROM drive 160 herein for example is digital multi CD-ROM drive (Digital Versatile Disc, be called for short DVD), CD player 150 then is a DVD player (DVD Player), yet these are not in order to qualification the present invention, and those of ordinary skills are on can being applied to it other sharable ATAPI interfacing equipment and installing.

Please referring to Fig. 1, look-at-me generation unit 130 among the figure meets the continuous look-at-me Int of ATAPI interface standard in order to generation, present embodiment is with a clock pulse generator, for example similarly be that integrated circuit NE555 cooperates peripheral circuit to realize, it produces frequency and selects to use 230Hz, certainly, those of ordinary skills also can form by other circuit that can produce the above continuous impulse signal of wide 25 microseconds of ripple, this continuous look-at-me Int finishes when the PC start, after confirming to have CD-ROM drive 160, CD-ROM drive 160 is switched when another for example is the CD player 150 of present embodiment, be used for keeping the PC 170 virtual usefulness that have CD-ROM drive, so can keep PC 170 and need not start shooting the state that can run well by overline.The details of integrated circuit NE555 and peripheral circuit thereof sees through suitably selecting for use of R1, R2 and C1, C2 as shown in Figure 6, can obtain the frequency of operation of 230Hz and 50% work period (Duty Cycle).

And reset signal generation unit 120 meets the reset signal Rst of ATAPI interface standard in order to generation, and this reset signal Rst must continue greater than 25 microseconds; The pulse signal that present embodiment produces with above-mentioned integrated circuit NE555, again through a double-channel monostable edge-triggered device, for example similarly be that 74HC221 is converted to reset signal Rst and realizes that the interlock circuit of this reset signal generation unit 120 and truth table are asked for an interview Fig. 7 A and Fig. 7 B.Contrasted as can be known by Fig. 7 A and Fig. 7 B, (become 0 by 0 change 1 or by 1) when the SELECT from switch control unit 110 changes, reset signal generation unit 120 all can produce the Rst signal and be sent to CD-ROM drive 160.Certainly, those of ordinary skills also can form by other circuit that can produce reset signal Rst, and this reset signal Rst is in order in handoff procedure, and replacement CD-ROM drive 160 can be it and switches latter linked equipment use.

140 of power control units are used for control example CD player 150 primary powers such as interfacing equipment such as ATAPI such as grade of present embodiment in this way, and it can be made up of the equipment that for example is controllable power switches such as relay.

In addition, switch control unit 110 couples reset signal generation unit 120 and look-at-me generation unit 130, with as the control maincenter, when receive for example be change-over switch (not illustrating) transmit switching command the time, switch control unit 110 can send one and select signal SELECT to give reset signal generation unit 120, this moment, 120 meetings of reset signal generation unit produced reset signal Rst, this reset signal Rst can select directly to be connected to CD-ROM drive 160 or via the control of switch control unit 110, with replacement CD-ROM drive 160.In addition, in the present embodiment by a plurality of three channel two-way numerical control analog switches, for example similarly be that switch control unit 110 that CD4053 formed also will switch the 2nd ATAPI interface online of ATAPI interface of CD-ROM drive 160 and PC 170 and CD player 150 according to switching command, its switching mode please cooperate referring to Fig. 2 to Fig. 5.

At first, in Fig. 2, CD-ROM drive 160 is connected in PC 170, PC 170 starts this moment, and run on the state that has CD-ROM drive 160, not online because of CD player 150 with CD-ROM drive 160, can't operate separately, be to cut off its primary power, certainly, if do not cut off its primary power also can, just present embodiment is considered and is saved the energy and prolong service life of equipment, so primary power is cut off.

Fig. 3 is during to be CD-ROM drive 160 by PC 170 online, switch to the transient program online with CD player 150, this moment, CD-ROM drive 160 did not belong to arbitrary ATAPI interfacing equipment, and the switch control unit 110 of CD driver sharing switching device 100, the continuous look-at-me Int that look-at-me generation unit 130 is produced then, input to PC 170, to keep the PC 170 virtual CD-ROM drives 160 that have, make PC 170 continue the state that runs well, and the reset signal Rst that reset signal generation unit 120 is produced, deliver to CD-ROM drive 160, with this CD-ROM drive 160 of resetting, in addition, also the primary power of CD player 150 is opened, to prepare and CD-ROM drive 160 online runnings.

Fig. 4 has switched to the state online with CD player 150 for CD-ROM drive 160, at this moment, remove the continuous look-at-me Int that look-at-me generation unit 130 is produced, still continue to input to PC 170, to keep the PC 170 virtual CD-ROM drives 160 that have, it still can be run well, and the primary power of CD player 150 is kept outside the power supply, the atapi bus of CD-ROM drive 160 has switched to CD player 150 online, so CD-ROM drive 160 formally is under the jurisdiction of CD player 150, make it can play the state of film or music.

Fig. 5 is during to be CD-ROM drive 160 by CD player 150 online, switch to the transient program online with PC 170, this moment, CD-ROM drive 160 did not belong to arbitrary ATAPI interfacing equipment yet, and the switch control unit 110 of CD driver sharing switching device 100, the still lasting continuous look-at-me Int that look-at-me generation unit 130 is produced, input to PC 170, to keep the still virtual CD-ROM drive 160 that has of PC 170, and the state that can run well, and the reset signal Rst that reset signal generation unit 120 is produced, deliver to CD-ROM drive 160 once more with its replacement, in order to online for its use with PC 170, in addition, also the primary power with CD player 150 cuts off, to save the energy.

Finished when switching to PC 170 by CD player 150 when CD-ROM drive 160, then its online situation will be more as shown in Figure 2.So can be according to user's wish, arbitrarily switch the actual online of CD-ROM drive 160, and reach the equipment that has CD-ROM drive except unactual, can't actually use outside its CD-ROM drive, can't influence any other function, also unlikelyly cause any other complicated changeover program just can share the purpose of CD-ROM drive 160.

In above-mentioned explanation, can conclude a kind of CD-ROM drive and share changing method, in order between an ATAPI interface and the 2nd ATAPI interface, switching is online with CD-ROM drive, and the method comprises the following steps: at first to provide a reset signal Rst who meets the ATAPI interface standard; Other provides a continuous look-at-me Int who meets the ATAPI interface standard; And when receiving switching command, switch the online of CD-ROM drive and an ATAPI interface and the 2nd ATAPI interface, and in handoff procedure, use above-mentioned reset signal Rst, with the replacement CD-ROM drive, wherein when switching to the 2nd ATAPI interface, and need above-mentioned continuous look-at-me Int is inputed to an ATAPI interface by an ATAPI interface, with the equipment of keeping an ATAPI interface in the normal operating condition of no CD drive.

Therefore, use a kind of CD driver sharing switching device provided by the invention and method in the information household appliances of sharing CD-ROM drive, can will for example be that PC and CD player are integrated in one then, and share a CD-ROM drive, and in handoff procedure, changeover program that need not be complicated, can keep PC in having or the normal operating condition of no CD drive, and can be in case of necessity, cut off the primary power that does not have the equipment that CD-ROM drive promptly can't turn round, to reach the purpose of saving the energy and prolonging service life of equipment.

Claims

1, a kind of CD driver sharing switching device, in order between first interface and second interface, switching is online with a CD-ROM drive, it is characterized in that this device comprises:

One reset signal generation unit is in order to produce a reset signal;

One look-at-me generation unit is in order to produce a continuous look-at-me; And

One switch control unit, couple this reset signal generation unit and this look-at-me generation unit, in order to when receiving switching command, switch the online of CD-ROM drive and this first interface and this second interface, and in handoff procedure, use this reset signal, with this CD-ROM drive of resetting, wherein when switching to this second interface, and need and continuous look-at-me to input to this first interface by this first interface.

2, CD driver sharing switching device as claimed in claim 1 is characterized in that, more comprises a power control unit, and when switching to this first interface by this second interface, this unit cuts off the power supply of this second interfacing equipment.

3, CD driver sharing switching device as claimed in claim 1 is characterized in that, this look-at-me generation unit comprises a clock pulse generator.

4, CD driver sharing switching device as claimed in claim 1 is characterized in that, this first interfacing equipment is a PC, and this second interfacing equipment is a CD player.

5, CD driver sharing switching device as claimed in claim 1 is characterized in that, the frequency of this continuous look-at-me is 230Hz.

6, CD driver sharing switching device as claimed in claim 1 is characterized in that, this switch control unit comprises a plurality of three channel two-way numerical control analog switches.

7, CD driver sharing switching device as claimed in claim 1 is characterized in that, this reset signal generation unit comprises a clock pulse generator and a double-channel monostable edge-triggered device.

8, a kind of CD-ROM drive shared system is characterized in that, this system comprises:

One CD-ROM drive;

One PC can be used this CD-ROM drive;

One CD player can use this CD-ROM drive to play the videodisc sheet; And

One CD driver sharing switching device, this CD-ROM drive can be switched use between this PC and this CD player, and when this PC loses this CD-ROM drive, need not the overline switching on and shutting down, can keep this PC in the normal operating condition that does not have this CD-ROM drive, this CD driver sharing switching device comprises:

One reset signal generation unit is in order to produce a reset signal;

One switch control unit, couple this reset signal generation unit and this look-at-me generation unit, in order to when receiving switching command, switch the online of this CD-ROM drive and this PC and this CD player, and in handoff procedure, use this reset signal, with this CD-ROM drive of resetting, wherein when switching to this CD player, and need and continuous look-at-me to input to this PC by this PC.

9, a kind of CD-ROM drive is shared changing method, in order between first interface and second interface, switch and this CD-ROM drive online between following two states: state one is that state and the state two that this CD-ROM drive is controlled by the equipment of this first interface is states that this CD-ROM drive is controlled by the equipment of this second interface, and this method comprises at least one of following (A), (B) step:

(A) when switching to state two, comprise following steps by state one:

Provide a switching signal that switches to state two by state one to share commutation circuit to a CD-ROM drive;

This first interface, one continuous look-at-me is provided;

Provide this CD-ROM drive one reset signal with this CD-ROM drive of resetting; And

(B) when switching to state by state two for the moment, comprise following steps:

Provide a switching signal that switches to state one by state two to share commutation circuit to this CD-ROM drive; And

Provide this CD-ROM drive reset signal with this CD-ROM drive of resetting.

10, CD-ROM drive as claimed in claim 9 is shared changing method, it is characterized in that, more comprises when being switched to this state by this state two for the moment, cuts off the step of the power supply of this second interfacing equipment.