CN201965620U - Display control circuit of reproducer - Google Patents
Display control circuit of reproducer Download PDFInfo
- Publication number
- CN201965620U CN201965620U CN2010206444319U CN201020644431U CN201965620U CN 201965620 U CN201965620 U CN 201965620U CN 2010206444319 U CN2010206444319 U CN 2010206444319U CN 201020644431 U CN201020644431 U CN 201020644431U CN 201965620 U CN201965620 U CN 201965620U
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- copy
- mcu controller
- keyboard
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Abstract
The utility model discloses a display control circuit of a reproducer, which is characterized is that: the display control circuit of the reproducer is provided with an MCU (Micro Control Unit) controller; and an LCD (Liquid Crystal Display) display interface circuit, a keyboard interface circuit, an RS232 serial port circuit and a USB (Universal Serial Bus) interface circuit are connected to the MCU controller. The display control circuit of the reproducer has the remarkable effects of: retaining a function of mutual communication between an original copy audition card and a PC (Personal Computer) by means of the USB interface, providing an LCD display function and a keyboard input control function to the copy audition card through arranging the LCD display interface circuit and the keyboard interface circuit and inserting an LCD display and a keyboard, reducing the volume and the weight of a reproducer, reducing the power consumption of the data reproducing process and causing the use of the copy audition card to be more convenient and flexible.
Description
Technical field
The utility model relates to the control circuit of duplicator, specifically, is a kind of duplicator display control circuit.
Background technology
In recent years, along with the fast development and the widespread use of information network, at more and more with all kinds of illegal activities that utilize network implementation, computer crime is a kind of new science and technology crime, and it has characteristics such as intelligent, disguised, strange land property.
Hard disk is the important content of obtaining of computer forensics technology as the topmost information storage medium of computing machine, also is the main direction of present various computer forensics instruments.It is more to have at present the specialty products that disk copy, data obtain on the domestic and international market, but all be the development and production of U.S. manufacturer basically, domestic like product has just carried out necessary Chinesizing to external product, does not still grasp the core technology of electronic data evidence obtaining.
Current, electronic data acquisition usually utilizes floppy disk, hard disk, external hard drive, external medium collections such as USB memory device, the so-called duplicator of described external media harvester, it mainly comprises logic controller and CPU, logic controller is provided with cpu i/f and CPU carries out two-way steering order transmission, logic controller is provided with source tray data-interface and destination disk data-interface, the source tray data-interface is connected with source tray, the destination disk data-interface is connected with destination disk, CPU steering logic controller reads the data message in the source tray, and duplicate to destination disk, carry out the transmission of data message.
The applicant once applied for Chinese invention patent: a kind of copy auditing card, number of patent application is 200710092950.1, the disclosed technology of this patent document has solved in the data reproduction process problem that lacks supervision and audit, has prevented loss of data and distorts, and has guaranteed judicial fairness.
But still there are many deficiencies in prior art: though solved the problem that prevents in the data reproduction process that data from losing and distorting by patent 200710092950.1 disclosed a kind of copy auditing cards, but want the auditing result of copy auditing card in the reproduction process of Real Time Observation data, must copy auditing card be connected on the PC, display by PC just can be checked, applied environment is subjected to limiting greatly, and the dirigibility of equipment is relatively poor.
The utility model content
Copy auditing card does not have the independent displaying function and causes the limited defective of environment for use in the prior art in order to overcome, the utility model proposes a kind of duplicator display control circuit, for copy auditing card provides LCD Presentation Function and keyboard input control function, reduce duplicator volume and weight, make copy auditing card can be under the situation that does not rely on PC independent operating.
For achieving the above object, the technical scheme that the utility model adopted is:
A kind of duplicator display control circuit is provided with a MCU controller, is connected with LCD display interface circuit, keyboard interface circuit and RS232 serial port circuit on this MCU controller, wherein:
The LCD display interface circuit is used to connect LCD display;
Keyboard interface circuit is used to connect keyboard;
The RS232 serial port circuit is used to connect copy auditing card;
Described copy auditing card is used for the data of source tray storage are copied to destination disk, and exercises supervision and audit in the data reproduction process;
Described keyboard is used for input control information to described MCU controller, this MCU controller is controlled described copy auditing card work by described RS232 serial port circuit, and the duty of described copy auditing card and the auditing result in the data reproduction process be transferred on the described LCD display by described LCD display interface circuit show.
By copy auditing card, guaranteed that source tray carries out data when duplicating to destination disk, the data of duplicating can not go out active and distort, and as electronic evidence-collecting, have guaranteed judicial fairness.By described duplicator display control circuit is set, can control copy auditing card by keyboard and finish whole data reproduction process, comprise copying, auditing verification, the initialization of audit key and hard disk initialization or the like, keyboard can also be controlled LCD display and realize the upset of display page and the removing of video data, copy auditing card is sent to the Data Audit result in the data reproduction process in the MCU controller by the RS232 serial port circuit, finally is sent on the LCD display through the LCD display interface circuit through the processing of MCU controller to show.Copy auditing card has just had a LCD Presentation Function and keyboard input control function like this, bulky duplicator that copy auditing card need not rely on or PC be the energy operate as normal just, reduced the power consumption in the data reproduction process, thereby made the portability of copy auditing card stronger.
Also be connected with usb circuit on the described MCU controller, described usb circuit is used to connect PC, described MCU controller is controlled described copy auditing card work by described RS232 serial port circuit, and the duty of this copy auditing card and the auditing result in the data reproduction process be transferred on the described PC by described usb circuit show.
By usb circuit is set, guaranteed the linkage function of copy auditing card and PC, the auditing result of copy auditing card may be displayed on the display screen of PC, also can control copy auditing card by PC and finish whole data replication actions.
Described usb circuit is provided with the usb protocol conversion chip, two signal wires in the first communication port group of this usb protocol conversion chip are connected on the first serial port group of described MCU controller, and two signal wires of the second communication port set of this usb protocol conversion chip are connected with the positive and negative data terminal of USB interface respectively.
Finish the first serial port group of MCU controller and the conversion of the Data Transport Protocol between the USB interface by the usb protocol conversion chip, guaranteed reliable bidirectional data transfers between USB interface and the MCU controller.
Described RS232 serial port circuit is provided with the serial port protocol conversion chip, two signal wires of the first communication port group of this serial port protocol conversion chip are connected on the second serial port group of described MCU controller, and two signal wires of the second communication port set of described serial port protocol conversion chip are connected on the 1st data pin and the 2nd data pin of COM1 interface.
Finish the second serial port group of MCU controller and the conversion of the Data Transport Protocol between the COM1 interface by the serial port protocol conversion chip, mainly be that the high-low level of data is changed, be connected with the serial communication interface of copy auditing card by the COM1 interface, guaranteed reliable bidirectional data transfers between copy auditing card and the MCU controller.
Described LCD display interface circuit is 20 pin parallel interfaces, and described LCD display is 128 * 64 dot matrix lcds, and this LCD display is plugged on the described 20 pin parallel interfaces.
Described keyboard interface circuit is 7 pin parallel interfaces, and described keyboard is 4 * 3 switchboardses, and this 4X3 switchboards is plugged on the described 7 pin parallel interfaces.
Adopt 128 * 64 dot matrix lcds and 4X3 switchboards, reduced the volume and weight of equipment greatly, guaranteed the dirigibility of equipment.Also be connected with hummer on the MCU controller, hummer can be pointed out by sounding when keyboard was pressed, and designed hommization more.
Remarkable result of the present utility model is: a kind of duplicator display control circuit of proposition, both be provided with USB interface, kept the function that original copy auditing card and PC intercom mutually, be provided with simultaneously LCD display interface circuit and keyboard interface circuit again, by grafting LCD display and keyboard, for copy auditing card provides LCD Presentation Function and keyboard input control function, duplicator volume and weight have been reduced, reduced the power consumption of data reproduction processes, made that the use of copy auditing card is convenient flexibly.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present utility model;
Fig. 2 is the annexation figure between MCU controller 1 and LCD display interface circuit 2 and the keyboard interface circuit 3 among Fig. 1;
Fig. 3 is the circuit theory diagrams of RS232 serial port circuit 4 among Fig. 1;
Fig. 4 is the circuit theory diagrams of usb circuit 5 among Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
As Fig. 1, shown in 2: a kind of duplicator display control circuit, be provided with a MCU controller 1, its chip model is ATmega64L-8AC, be connected with LCD display interface circuit 2, keyboard interface circuit 3 and RS232 serial port circuit 4 and usb circuit 5 on this MCU controller 1, wherein:
LCD display interface circuit 2 is used to connect LCD display, this LCD display interface circuit 2 is 20 pin parallel interfaces, wherein the 1st pin is a grounding pin, the 2nd pin is a power pin, be connected on the 5V direct supply V5.0, the 4th pin to the 6 pins are respectively reads to enable pin RS, write and enable pin WR and sheet enables pin EN, respectively with the PE5 of MCU controller 1, PE6 and PE7 pin connect, the 7th pin on earth 14 pins as 8 channel parallel data input port DB0～DB7, be connected with the PB0～PB7 pin of MCU controller 1 respectively, LCD display is 128 * 64 dot matrix lcd FM12864M, and this LCD display is plugged on the described 20 pin parallel interfaces.
As shown in Figure 3, RS232 serial port circuit 4 is used to connect copy auditing card, this RS232 serial port circuit 4 is provided with serial port protocol conversion chip U4, its chip model is MAX221E, the 9th pin Rout of this serial port protocol conversion chip U4 and the 11st pin Tin respectively with the second serial port group RX1 of described MCU controller 1, TX1 connects, and the 8th pin Rin of this serial port protocol conversion chip MAX221E and the 13rd pin Tout are connected on the 1st data pin and the 2nd data pin of COM1 interface.Adopt the COM1 data-interface, be connected with the serial communication interface of copy auditing card with the 2nd data pin by the 1st data pin, RS232 interface with respect to the DB9 form, the COM1 data-interface had both guaranteed that communication data carried out safe and reliable transmission according to the RS232 agreement, dwindled the volume of equipment again, connected also very convenient.
As shown in Figure 4, described usb circuit 5 is used to connect PC, this usb circuit 5 is provided with usb protocol conversion chip U1, its chip model is PL2303HK, the 1st pin of described usb protocol conversion chip PL2303HK and the 5th pin respectively with the first serial port group RXD of described MCU controller 1, TXD connects, the 15th pin DP of described usb protocol conversion chip U1 is connected with the D+ end of USB interface through first current-limiting resistance (R4), and the 16th pin (DM) of described usb protocol conversion chip U1 is connected with the D-end of described USB interface through the second current-limiting resistance R3 respectively.
Also be connected with hummer Buzzer on the described MCU controller 1, the PF7 pin of MCU controller 1 is connected on the base stage of switching tube Q1, the grounded emitter of switching tube Q1, be connected in series hummer Buzzer between collector and the 5V direct supply V5.0, high-low level state by the 1 control PF7 pin output of MCU controller makes and switching tube Q1 conducting or disconnection impels hummer Buzzer operate as normal, when described keyboard has button to press, hummer Buzzer can send " too " sound.
Also be connected with power module on the described MCU controller 1, this power module provides direct supply for described MCU microcontroller 1 and other functional module.
Principle of work of the present utility model is: by copy auditing card, guaranteed that source tray carries out data when duplicating to destination disk, the data of duplicating can not go out active and distort, and as electronic evidence-collecting, have guaranteed judicial fairness.By described duplicator display control circuit is set, can control copy auditing card by keyboard and finish whole data reproduction process, comprise copying, auditing verification, the initialization of audit key and hard disk initialization or the like, keyboard can also be controlled LCD display and realize the upset of display page and the removing of video data, copy auditing card is sent to the Data Audit result in the data reproduction process in the MCU controller 1 by RS232 serial port circuit 4, finally is sent on the LCD display through LCD display interface circuit 2 through the processing of MCU controller 1 to show.Copy auditing card has just had a LCD Presentation Function and keyboard input control function like this, bulky duplicator that copy auditing card need not rely on or PC be the energy operate as normal just, reduced the power consumption in the data reproduction process, thereby made the portability of copy auditing card stronger.
Claims (7)
1. duplicator display control circuit is characterized in that: is provided with a MCU controller (1), is connected with LCD display interface circuit (2), keyboard interface circuit (3) and RS232 serial port circuit (4) on this MCU controller (1), wherein:
LCD display interface circuit (2) is used to connect LCD display;
Keyboard interface circuit (3) is used to connect keyboard;
RS232 serial port circuit (4) is used to connect copy auditing card;
Described keyboard is used for input control information to described MCU controller (1), this MCU controller (1) is by the described copy auditing card work of described RS232 serial port circuit (4) control, and the duty of described copy auditing card and the auditing result in the data reproduction process be transferred on the described LCD display by described LCD display interface circuit (2) show.
2. a kind of duplicator display control circuit according to claim 1, it is characterized in that: also be connected with usb circuit (5) on the described MCU controller (1), described usb circuit (5) is used to connect PC, described MCU controller (1) is by the described copy auditing card work of described RS232 serial port circuit (4) control, and the duty of this copy auditing card and the auditing result in the data reproduction process be transferred on the described PC by described usb circuit (5) show.
3. a kind of duplicator display control circuit according to claim 2, it is characterized in that: described usb circuit (5) is provided with usb protocol conversion chip (U1), two signal wire (TXD in the first communication port group of this usb protocol conversion chip (U1), RXD) be connected to the first serial port group (RXD of described MCU controller (1), TXD) on, two signal wire (DP of the second communication port set of this usb protocol conversion chip (U1), DM) (D+ D-) connects with the positive and negative data terminal of USB interface respectively.
4. a kind of duplicator display control circuit according to claim 1, it is characterized in that: described RS232 serial port circuit (4) is provided with serial port protocol conversion chip (U4), two signal wire (Rout of the first communication port group of this serial port protocol conversion chip (U4), Tin) be connected to the second serial port group (RX1 of described MCU controller (1), TX1) on, (Rin Tout) is connected on the 1st data pin and the 2nd data pin of COM1 interface two signal wires of the second communication port set of described serial port protocol conversion chip (U4).
5. a kind of duplicator display control circuit according to claim 1, it is characterized in that: described LCD display interface circuit (2) is 20 pin parallel interfaces, described LCD display is 128 * 64 dot matrix lcds, and this LCD display is plugged on the described 20 pin parallel interfaces.
6. a kind of duplicator display control circuit according to claim 1 is characterized in that: described keyboard interface circuit (3) is 7 pin parallel interfaces, and described keyboard is 4 * 3 switchboardses, and this 4X3 switchboards is plugged on the described 7 pin parallel interfaces.
7. a kind of duplicator display control circuit according to claim 1 is characterized in that: also be connected with hummer on the described MCU controller (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206444319U CN201965620U (en) | 2010-12-06 | 2010-12-06 | Display control circuit of reproducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206444319U CN201965620U (en) | 2010-12-06 | 2010-12-06 | Display control circuit of reproducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201965620U true CN201965620U (en) | 2011-09-07 |
Family
ID=44528168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206444319U Expired - Fee Related CN201965620U (en) | 2010-12-06 | 2010-12-06 | Display control circuit of reproducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201965620U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105528562A (en) * | 2014-10-22 | 2016-04-27 | 北京中电瑞铠科技有限公司 | A PS/2 mouse and keyboard operational audit and control method and device |
-
2010
- 2010-12-06 CN CN2010206444319U patent/CN201965620U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105528562A (en) * | 2014-10-22 | 2016-04-27 | 北京中电瑞铠科技有限公司 | A PS/2 mouse and keyboard operational audit and control method and device |
| CN105528562B (en) * | 2014-10-22 | 2019-11-12 | 北京中电瑞铠科技有限公司 | PS/2 mouse, keyboard operation audit and control method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20151206 |
|
| EXPY | Termination of patent right or utility model |