CN1437197A - CD playback controller combined with computer and its control method - Google Patents

Abstract

The CD playback controller combined with computer includes controller, playback command input device and power supply. The power supply is connected to the controller and the CD drive in the computer and supplies DC source. The playback command input device connected to the controller is used to produce via user's operation CD playback control command transferred to the controller. The controller connected to the CD driver is used to control the playback of the CD in the CD drive based on the command. The present invention makes it possible to playback audio CD without on the computer, and the user can watch relevant information in the display, select music, regulate volume and perform other CD controlling operation via the button panel in the system unit or remote controller.

Description

CD broadcast control device and control method with computer combined

Technical field

The present invention relates to a kind of and CD broadcast control device and control method computer combined, particularly a kind of can be when computing machine not be started shooting the control device and the control method of play CD CD.

Background technology

Current society is the society of a computing machine and high speed information development.Along with the develop rapidly of semiconductor technology and electronic technology, computing power is developed with surprising rapidity, yet how to make computing machine hommization and use a computer succinctly, easily and become focal issue of computer application field more.For example, present desk-top computer generally all disposes CD drive such as CD-ROM or DVD-ROM, and the user can come audio plays CD (CD video disc) with them, appreciates graceful music by external speaker or earphone.But the step more complicated, the user at first will open computer power supply, enters the application software of operating system and operation play CD video disc then, selects play list, operations such as adjustment volume, broadcast or time-out also all to need to be undertaken by playout software.This process is cumbersome to the user, and requires user's familiar with computers and playout software.On the other hand, in this process, main frame and display must be powered normally, and the power consumption of the contour power consumption equipment of central processing unit CPU wherein, display and hard disk is bigger, for the function that only realizes play CD, caused the bigger waste of the energy.

Summary of the invention

The object of the present invention is to provide a kind of can be when computing machine not be started shooting control device and the control method thereof of audio plays CD, utilize this control device and control method, the user can show that the information of CD video disc (comprising: total song by compact display apparatus, current song, reproduction time etc.), and can utilize key panel on the main frame or telepilot to control CD drive and carry out selected songs and volume adjusting etc., operate very simple, thereby greatly facilitate the user, can save unnecessary energy dissipation again, the present invention also makes the design hommization more of computing machine.

Another object of the present invention is to provide a kind of computer system, but the also audio plays CD when not opening the main frame power supply of this system, the user can observe by the display of special use and play relevant information, and can utilize key panel or telepilot controls playing process, it is simple to operation, has saved the energy.

According to an aspect of the present invention, provide a kind of and CD broadcast control device computer combined, comprise controller, play instruction input unit and power supply, wherein:

This power supply connects the CD drive in this controller and this computing machine respectively, is used to provide direct supply;

This play instruction input unit connects this controller, is used for producing the steering order that control corresponding CD plays by user's operation, and sends this controller to;

This controller connects this CD drive, is used for the instruction according to this play instruction input unit input, controls the broadcast of the CD CD in this CD drive.

In the present invention, this power supply can be arranged in this computer power supply, and the input end of this power supply is without the switch of this computer power supply and be directly connected in the input end of this computer power supply.When the switch of this computer power supply does not leave, provide direct supply to this controller and this CD drive by this power supply.

Also can comprise a display in the control device of the present invention, this display connects this power supply and this controller respectively, provides working power by this power supply to this display, and this display shows the broadcast information of relevant CD under the control of this controller.

In control device of the present invention, this play instruction input unit can comprise a button control panel, this button control panel links to each other with this controller by a keystroke interface, wherein, comprise the button that is used to send following Play Control instruction on this button control panel at least: play/suspend, enter a song, enter next song, stop broadcasts, CD-ROM drive carriage opened/closed, volume increase and volume minimizing.This key panel can be arranged on the host panel of this computing machine.

In control device of the present invention, this play instruction input unit comprises a wireless remote control input unit, is used for sending the Play Control instruction by the emission wireless signal to this controller; Described device also comprises a wireless signal receiver that links to each other with this controller, is used to receive the Play Control instruction that this wireless remote control input unit sends and is sent to this controller.

In an embodiment of the present invention, this wireless remote control input unit and wireless signal receiver can adopt Infrared remote controller and infrared remote receiver respectively; Or adopt RF remote-controlled input unit and radio frequency signal receiver; Or employing utilizes the input unit and the receiver of blue bud technology.This play instruction input unit also can adopt the telepilot of other type.

In control device of the present invention, this controller can adopt microprocessor chip, comprising the COM port that is used for communicating with this CD drive; This CD drive can comprise and is used for the COM port that communicates with this controller;

This controller also can adopt the transformation from serial to parallel process chip.

According to a further aspect in the invention, provide a kind of computer system, comprise mainboard, main frame power supply, CD drive, audio output device and CD broadcast control device, this CD broadcast control device comprises controller and play instruction input unit, wherein:

Comprise in this main frame power supply that input end is without this power switch and the direct sub-power supply of direct power supply that connects the input end of this power supply, this sub-power supply connects this controller and this CD drive respectively, is used for providing when computer power supply is not opened direct supply;

This play instruction input unit connects this controller, is used for producing the steering order that control corresponding CD plays by user's operation, and sends this controller to;

This controller connects this CD drive, is used for the instruction according to this play instruction input unit input, controls the broadcast of the CD CD in this CD drive;

This CD drive links to each other with audio output device by audio signal amplifier, is used under the control of the Play Control instruction that this controller sends, and will be sent to audio output device output after amplifying from the voice data that CD is read.

In system of the present invention, described CD broadcast control device also can comprise a display, is used to show the broadcast information of relevant CD, and it connects this power supply and this controller respectively.Preferably, this display adopts small-sized LCD.

This play instruction input media can comprise button control panel and/or Infrared remote controller, is used for sending the Play Control instruction to this controller, and it connects this controller by corresponding interface.

This controller can adopt microprocessor or transformation from serial to parallel chip.

According to another aspect of the invention, a kind of CD control method for playing back is provided, be used for control computer system play CD when this main frame power supply is not opened, this computer system comprises mainboard, main frame power supply, CD drive, audio output device and CD broadcast control device, this CD broadcast control device comprises controller and play instruction input unit, and this method may further comprise the steps:

(1) controller receives the Play Control instruction by the play instruction input unit;

(2) controller carries out encoding process and package according to communications protocol predetermined between it and this CD drive with this steering order information, sends to this CD drive by its COM port;

(3) this CD drive is according to should predetermined communications protocol receiving this data packet and carry out decoding processing, with the Play Control operation that realizes that the user is desired.

Also can may further comprise the steps in the method for the invention:

Read in this CD drive during the voice data of audio frequency cd, this controller just sends a request command package to CD drive according to predetermined communications protocol every certain time interval, is used to ask this CD drive to send current broadcast information;

This CD drive is according to predetermined communications protocol, broadcast information such as the total song on this audio frequency cd, current play list sequence number, current song reproduction time, current volume value are carried out encoding process and package, send to this controller by COM port;

This controller is according to predetermined communications protocol, and after these data packet decoding processing, driving display is to show this broadcast information.

In one embodiment of the invention, comprise in this main frame power supply that input end is without this power switch and the direct sub-power supply of direct power supply that connects the input end of this power supply, this sub-power supply connects this controller and this CD drive respectively, be used for when computer power supply is not opened, providing direct supply, wherein, method of the present invention also can may further comprise the steps:

When in the certain hour that this main frame power supply is not opened, this CD drive is in duty not and continuing during not from any control information input of play instruction input unit, this controller turn-offs the output of this sub-power supply to this CD drive by the control line SWCD control that connects this sub-power supply;

When any control information was imported, controller was controlled the output of this sub-power supply of this sub-power up to this CD drive by control line SWCD;

When this main frame power supply was opened, this host power supply made this CD drive not be subjected to the control of this controller to this CD drive power supply and with control line SWCD end shield.

In the method for the invention, described communications protocol can comprise:

(1) for this controller sends the control command that the order package defines, comprise the control command that following button sends when being pressed at least:

Broadcast/Pause key, enter a song key, enter next song key, stop play button, CD-ROM drive carriage opened/closed key, volume increases key and volume reduces key;

(2) for this controller sends the request command that the order package defines, comprise at least:

The request command of the state of CD drive is obtained in transmission;

The request command of total song of current C D CD is obtained in transmission;

The request command of the sequence number of current play list is obtained in transmission;

The request command of volume value is obtained in transmission;

(3) for this controller sends the acknowledgement command that the order package defines, comprise following replying at least:

Data Receiving is correct;

The Data Receiving mistake, request repeat;

(4) send the state code of the CD drive of order package definition for this CD drive, comprise the state code of corresponding following state at least:

This CD drive is in broadcast state at present;

This CD drive is in halted state at present;

This CD drive is in halted state at present;

This CD drive is in the non-closed condition of carriage at present;

There is not CD in this CD drive at present;

In this CD drive the non-audio CD is arranged at present;

(5) for this CD drive sends the data transmission order that the order package defines, comprise at least to issue orders:

Send the total song order of CD CD in the CD drive;

Send the current play list sequence number of CD CD order in the CD drive;

Send current song reproduction time message command;

Send the order of CD drive current volume value;

(6) for this CD drive sends the acknowledgement command that the order package defines, comprise following replying at least;

Order receives correct;

Order receives mistake, request repeat;

(7) event definition comprises:

When CD drive under a certain state, when receiving a certain control command from this controller, send and reply accordingly or state code and/or carry out corresponding operation;

When this controller under a certain state, send a certain control command or acknowledgement command to CD drive;

This controller timed sending request command is given CD drive, to obtain information needed.

The present invention combines the CD drive (as DVD-ROM or CD-ROM) of computing machine (as desk-top computer) with the CD broadcast control device, constitute a CD Player when computing machine is not started shooting exactly, the user can control by key panel or telepilot and appreciate graceful CD music; Behind computer booting, CD drive still can normally be used.Therefore, the present invention is equivalent to add on computers a CD Player, and has increased broadcast information Presentation Function and distant control function, greatly simplifies and made things convenient for user's operation, simple to operation, reliable when making its play CD video disc; Because main frame is not started shooting, the equipment of display, CPU, the contour power consumption of hard disk does not all have power supply, has saved the energy.Still all be significantly improved the development prospect optimism from functional perspective from economic angle.

Further specify embodiments of the invention below in conjunction with accompanying drawing.

The accompanying drawing summary

Fig. 1 is the structural representation of the embodiment of CD broadcast control device of the present invention;

Fig. 2 is the process flow diagram of the embodiment of CD control method for playing back of the present invention;

Fig. 3 is the synoptic diagram with the example of the combined main frame of CD broadcast control device according to the present invention;

Fig. 4 is the synoptic diagram that is used for when computer power supply is not opened to the example of the interface of controller and CD drive power supply;

Fig. 5 is the structural representation of another embodiment of CD broadcast control device of the present invention;

Fig. 6 is the profile synoptic diagram of the small-sized LCD in the broadcast control device of the present invention;

Fig. 7 is the synoptic diagram of the mode of small-sized liquid crystal display displays broadcast information;

Fig. 8 is the synoptic diagram of the mode of small-sized liquid crystal display displays CD broadcast sound volume;

Fig. 9 is the synoptic diagram of Infrared remote controller.

The specific embodiment mode

Fig. 1 has reflected a kind of exemplary embodiments of CD broadcast control device of the present invention, wherein, adopts key panel and Infrared remote controller as CD play instruction input unit; Can be arranged on the same printed circuit board as master control board by controller, keystroke interface, infrared remote receiver and other auxiliary circuit; Key panel can be arranged on the computing machine front panel.

Fig. 5 is the theory diagram of another specific embodiment of CD broadcast control device of the present invention.CD play instruction input unit wherein adopts 7 key and infrared remote control devices and 7 key control panels, display adopts a little LCD, CD drive in the main frame adopts DVD-ROM, controller adopts single-chip microcomputer, power supply can be arranged in the main frame power supply and be used for power supply when the power switch of main frame power supply not opened, it comprises+12V and+5V output, for the purpose of difference, be designated as+12V SB and+5V SB; This power supply can be designed to electric supply installation (being also referred to as direct electric supply installation) independently and place in this main frame power supply and constitute the host power supply of an integral body.Below each several part among the figure is described further.1. host power supply

When computing machine is not started shooting, provide power supply separately for DVD-ROM and master control board by wherein direct electric supply installation; And whether control DVD-ROM by the signal that the SWCD control line receives master control board; Behind computer booting, the control signal of shielding master control board.

The power supply that provides to DVD-ROM adopts the big 4PIN joint of standard; Power supply that provides to master control board and control plug adopt the 3PIN fan joint, are respectively+5VSB, GND and SWCD.2.DVD-ROM

DVD-ROM sends standard asynchronous serial communication data packet (comprising total song, current song sequence number, song reproduction time and volume) to the single-chip microcomputer in the master control board by the COM port that is arranged at wherein, also receive the control signal package that single-chip microcomputer sends simultaneously, to realize 7 button control function by this port; Computing machine does not have the CD video disc among start and the DVD-ROM, but when not having the play instruction input, DVD-ROM after reading CD video disc information, the stall of CD video disc.Only when play instruction was imported, DVD-ROM began to rotate video disc, and play CD when halt instruction is imported, stops play CD, the video disc stall; When computer booting and play CD video disc, DVD-ROM still can send data packet by COM port, and receives the control signal package.

The COM port of I/O customization 3PIN behind the DVD-ROM, i.e. RXD, TXD and GND are used to realize the communication with master control board.3. mainboard

Mainboard has carried out suitable circuit design at realization replaying CD without need of opening terminal function.

Mainboard requires to provide the circuit design of replaying CD without need of opening terminal, and the PIN1 of ide interface requires high level (5V/3.3V) to keep when computing machine is not started shooting; When computer booting, the PIN1 of ide interface was changed to low level earlier before mainboard powers on, and reset after waiting mainboard to power on again.

Referring to Fig. 3, show block diagram according to the main frame of one embodiment of the invention.This main frame includes host power supply 1, power switch 2, CD drive 3, mainboard 4, built-in speaker 5 etc., wherein also include a direct electric supply installation 6, link to each other with host power supply 1, CD drive 3 and built-in speaker 5 respectively, be used for to directly power supply and be not subjected to the control of host power switch 2 of CD drive 3 and built-in speaker 5; One drives multiplying arrangement 7, link to each other with the CDIN interface of mainboard 4, provide+the 5VSB power supply by host power supply 1, be used to drive the sound signal that the CDIN interface of CD drive 3 by mainboard 4 provides, amplify the sound signal that the power of sound signal and the audio interface by mainboard 4 will drive after the amplification and offer built-in speaker 5; One switch selecting device 8 is connected between the audio interface that drives multiplying arrangement 7 and mainboard 4, is used for the switch according to host power supply 1, comes switch drive multiplying arrangement 7; With a gauge tap device 9, be connected between the ide interface of the South Bridge chip of mainboard 4 and mainboard 4, be used for switch according to host power supply 1, whether control offers the ide interface of mainboard 4 from the IDERST# signal of CD drive 3.

As shown in Figure 3, also include a voltage bias device 10, be connected between the CDIN interface and driving multiplying arrangement 7 of mainboard 4, be used for the sound signal from the CDIN interface is carried out voltage bias.As shown in Figure 3, also comprise a mainboard protective device 11, be connected between the South Bridge chip of the ide interface of mainboard 4 and mainboard 4, be used to protect the South Bridge chip of mainboard 4 under off-mode, not disturbed by CD-ROM drive signal from ide interface.

As shown in Figure 4, this direct electric supply installation 6 is a 12VSB electric supply installation, and this 12VSB electric supply installation comprises 4 pins that are connected with CD drive (12VSB, GND, a GND and 5VSB) standard interface 6a and 2 pins that are connected with built-in speaker (5VSB and GND) standard interface 6b.Particularly, on the basis of original computer power supply 1, design 1 tunnel+12VSB feed circuit 6 in addition again, give CD drive 3 power supplies and give built-in speaker 5 power supplies by one 2 pins (5VSB and GND) standard interface 6b by one 4 pins (12VSB, GND, GND and 5VSB) standard interface 6a.Wherein+no matter whether 12VSB be defined as host power switch and open with+5VSB, all can stably provide+12V and+5V voltage.If main frame does not adopt built-in speaker 5, then this 2 pin (5VSB and GND) standard interface 6b can add.

With reference to Fig. 1 and Fig. 3, as power supply among Fig. 1 and CD drive, can constitute a embodiment according to computer system of the present invention by the direct electric supply installation among Fig. 3 and CD-ROM drive.4. little LCD

When the play CD video disc, little LCD shows total song, current song sequence number, song reproduction time and the volume etc. by the CD video disc of single-chip microcomputer decoding.

Little LCD+5V power supply and GND provide by master control board; Driving voltage: 5V; Drive way: 1/16DUTY; Display mode: FSTN (wide visual angle); Visual angle: 6 points; Polaroid type: semi-transparent; Working temperature :-10 ℃～+ 50 ℃; Storage temperature :-20 ℃～+ 60 ℃; Bind mode: zebra bar; LC packaged type: COD (nation is fixed); Chip for driving: KS0066; Mode backlight: LED+ light guide plate; LED lamp source: blueness; LCD background color: blueness; Working current: 3mA (MAX); Operating voltage: 5V.Its profile as shown in Figure 6.

The demonstration specification of this LCD is as follows:

When (1) non-CD video disc being arranged in not having video disc or DVD-ROM among the DVD-ROM, if the key information input is arranged, LED-backlit was opened 5 seconds, and little LCD shows " LEGEND SONIC ".

(2) when carriage opened/closed key information was imported, LED-backlit was opened 5 seconds, and little LCD shows " LEGEND SONIC ".

(3) in the play CD process, LED-backlit is opened all the time, and little LCD shows " total song+current song sequence number+song reproduction time+volume ", as shown in Figure 7; Postpone after 30 seconds, with the alternately roll screen appearance from right to left of Random Wave line, the roll screen time was respectively 30 seconds and 10 seconds.Be 16 LCD display units among Fig. 7, wherein, the 1st, 2 shows total number of tracks, and the 4th, 5 shows current song sequence number, the 7th, 8 and the 10th, 11 reproduction time that shows current song respectively minute and second, the 13-16 position shows volume.The mode that volume shows utilizes 4 LCD to represent that the volume of 0-15 level shows as shown in Figure 8 among the figure.

(4) when play CD finishes or stop key the information input, little LCD shows " total song+current song sequence number+song reproduction time+volume ", LED-backlit postpones to close after 5 seconds, if continue 3 minutes without any the key information input, then closes little LCD and shows.5.7 key control panel

The mainframe box front panel designs the 7 key control panels of DVD-ROM separately, and 7 keys are respectively broadcast/time-out, a last song, next song, stop, carriage opened/closed, volume increase, volume reduces.6. Infrared remote controller

Infrared remote controller has 7 buttons, and function is identical with 7 key control panels.In an embodiment, adopt a joint 3V button cell; At least can launch 7 kinds of different codes; Remote-controlled chip model: HT6221; Operating voltage: 1.8V～3.5V; Carrier wave: 3.8K Hz infrared ray; CODE pattern: PPM (Pulse Position Modulation); KEY number: 32; Encapsulation: 20DIP/SSOP; Working current (no load): 400uA (MAX); Working current (emission): 6mA (MAX); Standby current: 1uA (MAX); System frequency: 488K Hz; Annotate: just power consumption during emission, from the holding state to the button, press and enter mode of operation above 36ms; Can support two keys to press simultaneously.IR LED model: EL-1L2; Material: GaAs/GaAlAs; Voltage: 1.6V (MAX) forward; Forward current: 100mA (MAX); Revers voltage: 5V; Backward current: 10uA; Receiving angle: ± 30 °; Wavelength: 940nm.

Fig. 9 is a kind of panel designs of Infrared remote controller, wherein, "+,-,

Increasing-and-decreasing key, cradle key, Pause key, play button, last one bent key and next Qu Jian of expression volume.7. single-chip microcomputer

In an embodiment, single-chip microcomputer drives little LCD and shows after receiving the data packet of DVD-ROM and decoding total song of CD video disc, current song sequence number, song reproduction time and volume; Receive the key information of 7 key control panels, send to DVD-ROM behind the coding, to realize corresponding operation; Receive the key information that infrared remote receiver sends, send to DVD-ROM behind the coding, to realize corresponding operation; Send request command to DVD-ROM, to obtain the state of DVD-ROM; In play CD video disc process, sent 1 or 2 request command to DVD-ROM in per 1 second, to obtain total song, current song sequence number, song reproduction time and the volume value etc. of CD video disc among the DVD-ROM; When DVD-ROM is in halted state, and when import without any control signal in a period of time, sends and turn-off DVD-ROM power control signal and maintenance; When the control signal input is arranged again, send and open DVD-ROM power control signal and maintenance.

In an embodiment, can to adopt model be the 8 bit microprocessors of W78C52C to controller; Include 256B RAM and 8KB ROM; Frequency of operation: 12/24/33/40M Hz; Comprise: 64KB program working area, 64KB data working area, 3 groups of 16bit timer/counters, 4 groups of 8bit I/O mouths; Packaged type: DIP40, PLCC44, QFP44; Operating voltage: 5V; Working current: 30mA; Standby current: 6mA; Quiescent current: 50uA.8. infrared remote receiver

Infrared remote receiver receives the key information that Infrared remote controller sends, and sends it to single-chip microcomputer.The model of Cai Yonging is in an embodiment: M-SRE 001 D1-T5; Operating voltage: 5V; Working current: 30mA; Receiving angle: ± 30 °, 25m; Wavelength: 940nm.9. keyswitch

Master control board arranges that 7 keyswitches respond the different key information of 7 key control panels respectively.In an embodiment, its overall dimensions are 6 * 6 * 4.3 (mm); Lay respectively at below 7 buttons of 7 key control panels, and link to each other with 7 I/O ports of single-chip microcomputer P2 mouth.Power supply and control socket

Provide 3PIN2.54mm pitch fan socket to link to each other with host power supply, wherein: PIN1 for+5VSB, PIN2 are that GND, PIN3 are SWCD.11. other socket

Serial data communication 4PIN2.54mm pitch interface socket, wherein: PIN1 is that TxD, PIN2 are that RxD, PIN3 are that GND, PIN4 are the room; Little LCD data and power supply 17PIN2.54mmpitch interface socket, wherein:

PIN1 is DB2 for VSS PIN9

PIN2 is DB3 for VCC PIN10

PIN3 is DB4 for VEE PIN11

PIN4 is DB5 for RS PIN12

PIN5 is DB6 for R/W PIN13

PIN6 is DB7 for E PIN14

PIN7 is LED+ for DB0 PIN15

PIN8 is LED-for DB1 PIN16

PIN17 is the room.12. communications protocol

Following asynchronous communication agreement is adopted in single-chip microcomputer and DVD-ROM communication.

Asynchronous serial communication signal :+3.3V is " 1 ", and 0V is " 0 "

Asynchronous serial communication signal transfer rate: 9600bps

The asynchronous serial communication agreement:

(1) asynchronous serial communication frame format, 1 frame are 11: 1 start bit (for " 0 "), 8 bit data positions (low level is preceding), 1 digit pair check bit, 1 position of rest (being " 1 ")

(2) send form

1. send the order package (Command Packet) of regular length

2. master control board is sent as single byte command package (CP0), called after CONCMD

3. DVD-ROM be sent as 3 byte command packages (CP0, CP1, CP2), first byte called after DVDCMD, all the other are data byte DATA1 ... DATAn

(3) command word definition

1. master control board sends order package (CP0): CONCMD

Control command

CP0=00000000: broadcast/Pause key is pressed

CP0=00000001: a last song key is pressed

CP0=00000010: next song key is pressed

CP0=00000011: stop key is pressed

CP0=00000100: carriage opened/closed key is pressed

CP0=00000101: volume increases key and presses

CP0=00000110: volume reduces key and presses

Acknowledgement command

CP0=10000000: Data Receiving is correct

CP0=10000001: Data Receiving mistake, request repeat

Request command

CP0=10000010: send and obtain the DVD-ROM state request

CP0=10000011: send the total song request of current C D video disc of obtaining

CP0=10000100: send the current play list sequence number request of obtaining

CP0=10000101: send and obtain current song reproduction time information request

CP0=10000110: send the volume value request of obtaining

2. DVD-ROM send the order package (CP0, CP1, CP2): DVDCMD, DATA1, DATA2

State code (DVD-ROM state)

CP0=10000010, CP1=00000000: DVD-ROM is in broadcast state, CP2=0 at present

CP0=10000010, CP1=00000001: DVD-ROM is in halted state, CP2=0 at present

CP0=10000010, CP1=00000010: DVD-ROM is in halted state, CP2=0 at present

CP0=10000010, CP1=00000011: DVD-ROM is in the non-closed condition of carriage, CP2=0 at present

State code (video disc state)

CP0=10000010, CP1=00000100: do not have video disc, CP2=0 among the DVD-ROM at present

CP0=10000010, CP1=00000101: non-CD video disc is arranged, CP2=0 among the DVD-ROM at present

Acknowledgement command

CP0=10000000: order receives correct, CP1=0, CP2=0

CP0=10000001: order receives false request and retransmits, CP1=0, CP2=0

Data transmit

CP0=10000011: send the total song order of CD video disc among the DVD-ROM, CP1: be total total several Zhi Qu, CP2=0

CP0=10000100: send the current play list sequence number of CD video disc order among the DVD-ROM, CP1: be which song, CP2=0

CP0=10000101: send current song reproduction time message command, CP1: divide CP2: second

CP0=10000110: send the order of DVD-ROM current volume value, CP1: be volume value (0-15), CP2=0

(4) event definition

● receive the carriage opened/closed control command of master control board transmission as DVD-ROM after, send and receive correct acknowledgement command, and carry out corresponding the operation;

● when non-CD video disc is arranged in not having video disc or DVD-ROM among the DVD-ROM, receive other control command except that the carriage opened/closed that master control board sends after, send corresponding state code (video disc state);

● when DVD-ROM is in certain DVD-ROM state, receive the control command that master control board sends after, send and receive correct acknowledgement command, and carry out corresponding operation;

● when DVD-ROM is in other state except that playing and suspending, receive after volume that master control board sends increases or reduce control command, send the correct acknowledgement command of reception, but do not carry out any operation;

● when first of DVD-ROM play CD video disc is bent, receive master control board and send last one bent control command, or last of play CD video disc receives master control board when bent and sends next bent control command, send and receive correct acknowledgement command, but do not carry out any operation;

● when DVD-ROM is in halted state, receive after master control board sends last one bent or next bent control command, send and receive correct acknowledgement command, and jump to a song or next bent starting point but do not play still time-out;

● when DVD-ROM receive that master control board sends obtain the DVD-ROM status request after, send corresponding state code;

● receive other request commands of master control board transmission as DVD-ROM after, send corresponding data and transmit order;

● when DVD-ROM can not discern the order of master control board transmission, send the acceptance error order, order is retransmitted in the request master control board;

● when the order (do not comprise and receive correct order) that DVD-ROM sends,, then retransmit this order if do not replied;

● when DVD-ROM receives the reception bad command that master control board sends, then retransmit this order;

● master control board regularly sends 1 or 2 five kinds of request command to DVD-ROM per 1 second, to obtain information needed;

● when the key information input was arranged in the master control board, the master control board transmitting control commands was given DVD-ROM;

● after the key information that telepilot sends was received in master control board, the master control board transmitting control commands was given DVD-ROM;

● receive the state code or data transmission order of DVD-ROM transmission when master control board after, send and receive correct acknowledgement command;

● when master control board can not be discerned the order of DVD-ROM transmission, send the acceptance error order, request DVD-ROM retransmits order;

● when the order (do not comprise and receive correct order) that master control board sends,, then retransmit this order if do not replied;

● receive the reception bad command that DVD-ROM sends when master control board, then retransmit this order.

Fig. 2 has usually described a kind of exemplary embodiments of CD control method for playing back of the present invention.In specific embodiment, playing process comprises:

1. when the user presses a certain button of seven key control panels, seven key control panels send this control information to single-chip microcomputer, single-chip microcomputer according to communications protocol with this control information encoding process and package, send to DVD-ROM by COM port, DVD-ROM receives this data packet and decoding processing according to communications protocol, to realize the desired control operation of user.

2. when the user presses a certain button of telepilot, telepilot at first is encoded into this control information the infrared wavelength signal and sends to infrared remote receiver in the master control board by infrared transmitter, infrared remote receiver receives and changes into corresponding level signal behind this infrared wavelength signal and send single-chip microcomputer to, single-chip microcomputer according to communications protocol with this control information encoding process and package, send to DVD-ROM by COM port, DVD-ROM receives this data packet and decoding processing according to communications protocol, to realize the desired control operation of user.

3. as DVD-ROM during at the play CD video disc, single-chip microcomputer sent a request command package according to communications protocol in per 1 second and sends to DVD-ROM by COM port, DVD-ROM according to communications protocol with the total song of CD video disc, current play list sequence number, current song reproduction time, current volume value encoding process and package, send to single-chip microcomputer by COM port, single-chip microcomputer shows the little LCD of these data packet decoding processing rear drives according to communications protocol.

4. do not start shooting that DVD-ROM is in halted state and when continuing to import without any control information in 3 minutes when computing machine, single-chip microcomputer is put low level with the SWCD end, then host power supply turn-off to DVD-ROM+12VSB and+5VSB, and when any control information is imported, single-chip microcomputer is earlier put high level with the SWCD end, then host power supply recover to DVD-ROM+12VSB and+the 5VSB power supply; When computer booting, host power supply with the SWCD end shield then DVD-ROM all the time electric and be not subjected to the control of single-chip microcomputer.

When the main frame replaying CD without need of opening terminal, master control board is the control core of total system, partly form by a single-chip microcomputer, infrared remote receiver, seven keyswitches, several power supply and data-interfaces etc., it receives the related data of DVD-ROM transmission and drives little LCD by COM port and shows, simultaneously can interrupt response 7 key control panels or the key information of telepilot and send to DVD-ROM by COM port and go to carry out corresponding operation by it, this is one embodiment of the present invention.In addition, can adopt other chips such as transformation from serial to parallel that the serial signal of DVD-ROM is changed into parallel signal removes to drive little LCD and shows and replace single-chip microcomputer, perhaps adopt the remote control and the receiver of alternate manners such as blue bud technology, radio frequency to replace infrared, perhaps adopt other key mode, perhaps adopt other display mode to replace little LCD, perhaps master control board, 7 key control panels, little LCD being incorporated on one or the two boards, all is different embodiments more of the present invention.These different embodiments all are understandable for those skilled in the art, and simultaneously, according to the scope of spirit of the present invention and claims, those skilled in the art can make other modifications and variations to the present invention.

Claims (13)

1, a kind of CD broadcast control device of and computer combined comprises controller, play instruction input unit and power supply, wherein:

This power supply connects the CD drive in this controller and this computing machine respectively, is used to provide direct supply;

This play instruction input unit connects this controller, is used for producing the steering order that control corresponding CD plays by user's operation, and sends this controller to;

This controller connects this CD drive, is used for the instruction according to this play instruction input unit input, controls the broadcast of the CD CD in this CD drive.

2, device according to claim 1, wherein, this power supply is arranged in this computer power supply, and the input end of this power supply is without the switch of this computer power supply and be directly connected in the input end of this computer power supply.

3, device according to claim 1, wherein also comprise a display, this display connects this power supply and this controller respectively, provides working power by this power supply to this display, and this display shows the broadcast information of relevant CD under the control of this controller.

4, device according to claim 1, wherein, this play instruction input unit comprises a button control panel, this button control panel links to each other with this controller by a keystroke interface, wherein, comprise the button that is used to send following Play Control instruction on this button control panel at least: play/suspend, enter a song, enter next song, stop broadcasts, CD-ROM drive carriage opened/closed, volume increase and volume minimizing.

5, according to claim 1 or 4 described devices, wherein, this play instruction input unit comprises a wireless remote control input unit, is used for sending the Play Control instruction by the emission wireless signal to this controller; Described device also comprises a wireless signal receiver that links to each other with this controller, is used to receive the Play Control instruction that this wireless remote control input unit sends and is sent to this controller.

6, device according to claim 5, wherein, this wireless remote control input unit and wireless signal receiver are respectively Infrared remote controller and infrared remote receiver; Or RF remote-controlled input unit and radio frequency signal receiver; Or utilize the input unit and the receiver of blue bud technology.

7, device according to claim 1, wherein:

This controller is a microprocessor chip, comprising the COM port that is used for communicating with this CD drive; This CD drive comprises and is used for the COM port that communicates with this controller;

This controller or transformation from serial to parallel process chip.

8, a kind of computer system comprises mainboard, main frame power supply, CD drive, audio output device and CD broadcast control device, and this CD broadcast control device comprises controller and play instruction input unit, wherein:

Comprise in this main frame power supply that input end is without this power switch and the direct sub-power supply of direct power supply that connects the input end of this power supply, this sub-power supply connects this controller and this CD drive respectively, is used for providing when computer power supply is not opened direct supply;

This play instruction input unit connects this controller, is used for producing the steering order that control corresponding CD plays by user's operation, and sends this controller to;

This controller connects this CD drive, is used for the instruction according to this play instruction input unit input, controls the broadcast of the CD CD in this CD drive;

This CD drive links to each other with audio output device by audio signal amplifier, is used under the control of the Play Control instruction that this controller sends, and will be sent to audio output device output after amplifying from the voice data that CD is read.

9, system according to claim 8, wherein:

Described CD broadcast control device also comprises a display, is used to show the broadcast information of relevant CD, and it connects this power supply and this controller respectively;

This play instruction input media comprises button control panel and/or Infrared remote controller, is used for sending the Play Control instruction to this controller, and it connects this controller by corresponding interface;

This controller adopts microprocessor or transformation from serial to parallel chip.

10, a kind of CD control method for playing back, be used for control computer system play CD when this main frame power supply is not opened, this computer system comprises mainboard, main frame power supply, CD drive, audio output device and CD broadcast control device, this CD broadcast control device comprises controller and play instruction input unit, and this method may further comprise the steps:

(1) controller receives the Play Control instruction by the play instruction input unit;

(2) controller carries out encoding process and package according to communications protocol predetermined between it and this CD drive with this steering order information, sends to this CD drive by its COM port;

(3) this CD drive is according to should predetermined communications protocol receiving this data packet and carry out decoding processing, with the Play Control operation that realizes that the user is desired.

11, method according to claim 10, further comprising the steps of:

Read in this CD drive during the voice data of audio frequency cd, this controller just sends a request command package to CD drive according to predetermined communications protocol every certain time interval, is used to ask this CD drive to send current broadcast information;

This CD drive is according to predetermined communications protocol, broadcast information such as the total song on this audio frequency cd, current play list sequence number, current song reproduction time, current volume value are carried out encoding process and package, send to this controller by COM port;

This controller is according to predetermined communications protocol, and after these data packet decoding processing, driving display is to show this broadcast information.

12, according to claim 10 or 11 described methods, wherein, comprise in this main frame power supply that input end is without this power switch and the direct sub-power supply of direct power supply that connects the input end of this power supply, this sub-power supply connects this controller and this CD drive respectively, be used for direct supply is provided when computer power supply is not opened, described method is further comprising the steps of:

When in the certain hour that this main frame power supply is not opened, this CD drive is in duty not and continuing during not from any control information input of play instruction input unit, this controller turn-offs the output of this sub-power supply to this CD drive by the control line SWCD control that connects this sub-power supply;

When any control information was imported, controller was controlled the output of this sub-power supply of this sub-power up to this CD drive by control line SWCD;

When this main frame power supply was opened, this host power supply made this CD drive not be subjected to the control of this controller to this CD drive power supply and with control line SWCD end shield.

13, according to claim 10 or 11 described methods, described communications protocol comprises:

(1) for this controller sends the control command that the order package defines, comprise the control command that following button sends when being pressed at least:

Broadcast/Pause key, enter a song key, enter next song key, stop play button, CD-ROM drive carriage opened/closed key, volume increases key and volume reduces key;

(2) for this controller sends the request command that the order package defines, comprise at least:

The request command of the state of CD drive is obtained in transmission;

The request command of total song of current C D CD is obtained in transmission;

The request command of the sequence number of current play list is obtained in transmission;

The request command of volume value is obtained in transmission;

(3) for this controller sends the acknowledgement command that the order package defines, comprise following replying at least:

Data Receiving is correct;

The Data Receiving mistake, request repeat;

(4) for this CD drive sends the state code of the CD drive of ordering the package definition and the state code of CD, comprise the state code of corresponding following state at least:

This CD drive is in broadcast state at present;

This CD drive is in halted state at present;

This CD drive is in halted state at present;

This CD drive is in the non-closed condition of carriage at present;

There is not CD in this CD drive at present;

In this CD drive the non-audio CD is arranged at present;

(5) for this CD drive sends the data transmission order that the order package defines, comprise at least to issue orders:

Send the total song order of CD CD and total number of tracks in the CD drive;

Send the current play list sequence number order of CD CD and this song sequence number in the CD drive;

Send current song reproduction time message command and reproduction time;

Send CD drive current volume value order and volume value data;

(6) for this CD drive sends the acknowledgement command that the order package defines, comprise following replying at least;

Order receives correct;

Order receives mistake, request repeat;

(7) event definition comprises:

When CD drive under a certain state, when receiving a certain control command from this controller, send and reply accordingly or state code and/or carry out corresponding operation;

When this controller under a certain state, send a certain control command or acknowledgement command to CD drive;

This controller timed sending request command is given CD drive, to obtain information needed.

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