CN102655577A - Television with multiplexing of USB (Universal Serial Bus) interface and method for multiplexing USB interface - Google Patents
Television with multiplexing of USB (Universal Serial Bus) interface and method for multiplexing USB interface Download PDFInfo
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- CN102655577A CN102655577A CN201210084555XA CN201210084555A CN102655577A CN 102655577 A CN102655577 A CN 102655577A CN 201210084555X A CN201210084555X A CN 201210084555XA CN 201210084555 A CN201210084555 A CN 201210084555A CN 102655577 A CN102655577 A CN 102655577A
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Abstract
The invention discloses a television with multiplexing of a USB (Universal Serial Bus) interface and a method for multiplexing the USB interface. The television comprises the USB interface, a multimedia signal processing unit, a serial-port signal processing unit, a switching circuit, an I/O (Input/Output) control unit, an input unit and a central processor, wherein the USB interface is connected with the multimedia signal processing unit and is connected with the serial-port signal processing unit by the switching circuit; the output of the I/O control unit is connected to the control end of the switching circuit; the central processor is respectively connected with the multimedia signal processing unit, the serial-port signal processing unit and the I/O control unit; and the output of the input unit is connected to the central processor. The invention has the advantages that the switching circuit is connected between the USB interface and the serial-port signal processing unit, the connection between the serial-port signal processing unit and the USB interface is isolated by utilizing the switching circuit, and when the isolation needs to be realized, the switching circuit is controlled by the I/O control unit, so that the USB interface not only can be used as a multimedia input interface, but also can be multiplexed as a serial port to complete all the functions of the serial port.
Description
Technical field
The present invention relates to TV technology, particularly relate to multiplexing television set of a kind of USB interface and USB interface multiplexing method thereof.
Background technology
Along with further developing of TV tech, DTV especially, the development of Web TV, television function is also more and more, therefore, needs constantly upgrade the Control Software in the television set, could adapt to the continuous expansion of television set function.Present TV software upgrading all is to realize through USB interface or serial ports usually, like this, and in order to realize upgrading to television set inner control software; In existing television set, usually USB interface and serial ports will be set all is com interface, and it is fast that USB interface has transmission speed, patches conveniently; The characteristics that developability is good, the plug and play of USB interface support equipment and hot plug function are though the com interface transmission speed is slow; Patch inconvenience, but com interface has transmission range long, cost is low; Exploitation is simple, the characteristics that do not need driver to support.Because be provided with USB interface and com interface in the existing television set, this has just caused the interface of present television set various, has increased the area of television set pcb board virtually, cause the cost of television set complete machine to increase.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; Multiplexing television set of a kind of USB interface and USB interface multiplexing method thereof are provided; Be between USB interface and serial port function processing unit, to be connected in series a switching circuit, utilize switching circuit to come being connected between isolated serial port functional process unit and the USB interface, when needs are realized isolating; Through the I/O control unit switching circuit is controlled; Make this USB interface both can be used as the multimedia input interface, can also be multiplexed with serial ports, accomplish the various functions of serial ports.
The technical solution adopted for the present invention to solve the technical problems is: the television set that a kind of USB interface is multiplexing comprises: USB interface, multimedia signal dispose unit, rs 232 serial interface signal processing unit, switching circuit, I/O control unit, input unit and central processing unit; USB interface is connected with the multimedia signal dispose unit; USB interface is connected with the rs 232 serial interface signal processing unit through switching circuit; The output of I/O control unit is connected to the control end of switching circuit; Central processing unit is connected with multimedia signal dispose unit, rs 232 serial interface signal processing unit and I/O control unit respectively; The output of input unit is connected to central processing unit.
Further also comprise the software upgrading signal processing unit, the software upgrading signal processing unit is connected with USB interface, central processing unit respectively.
The multiplexing television set of a kind of USB interface of the present invention; Be that serial ports with television set is that com interface is removed; Realize the com interface function through the multiplexing mode of USB interface, what USB interface transmitted is high speed signal, can be used for connecting the upgrading of multimedia and realization software; Because the USB interface transmission is high speed signal, and impedance matching is had very high requirement; And com interface transmission is low speed signal, when USB interface being multiplexed with serial ports using, transmission this moment be low speed signal, for preventing to influence multimedia and software upgrading function, need to increase a switching circuit and do mutual isolation.And this switching circuit; Controlled by the I/O control unit, when needs were connected being connected of USB interface and rs 232 serial interface signal processing unit, the I/O control unit was to control signal of control end transmission of switching circuit; Make switching circuit connect; When needs broke off being connected of USB interface and rs 232 serial interface signal processing unit, the I/O control unit sent another control signal to the control end of switching circuit, made the switching circuit disconnection.The I/O control unit sends any control signal, and then central processing unit is controlled.
In the use, when needs were the com interface use with USB interface as serial ports, television set can show a menu interface that presets; Whether prompting selects serial port function; Operating personnel just can come to the menu interface input information such as corresponding key on remote controller or the television set through input unit, and then, the central processing unit of television set will read menu setting information; When operating personnel are when selecting serial port function; Then the central processing unit of television set will send a control signal to the control end of switching circuit through the I/O control unit, make switching circuit connect, and then the information that inserts of USB interface will be sent to the rs 232 serial interface signal processing unit and handles; When operating personnel are not when selecting serial port function; Then the central processing unit of television set will send another control signal to the control end of switching circuit through the I/O control unit; Make switching circuit break off; Form the mutual isolation between USB interface and the rs 232 serial interface signal processing unit, then the information of USB interface access will be sent to and go in multimedia signal dispose unit or the software upgrading signal processing unit to handle.
A kind of USB interface multiplexing method of television set; Be between USB interface and rs 232 serial interface signal processing unit, to increase a switching circuit; When needs use this USB interface as serial ports, connect this switching circuit, the signal that USB interface is inserted can be delivered in the rs 232 serial interface signal processing unit; When not needing this USB interface used as serial ports, break off this switching circuit, make USB interface and rs 232 serial interface signal processing unit be in isolation; And being switched on or switched off of this switching circuit is to be controlled by the I/O control unit.
A kind of USB interface multiplexing method of television set comprises the steps:
A. the central processing unit of television set reads menu setting information;
B. the central processing unit of television set judges whether the serial port function sign is 1, and judged result goes to step f for being, otherwise, continue next step;
C. the central processing unit of television set judges whether to exist upgrade software, and judged result continues next step for being, otherwise, go to step h;
D. the central processing unit of television set judges whether to deposit into capable upgrade software, and judged result continues next step for being, otherwise, go to step h;
E. the central processing unit software upgrade processing procedure of television set then goes to step h;
F. the central processing unit of television set is carried out the rs 232 serial interface signal processing procedure, then goes to step h;
G. the central processing unit of television set is carried out the multimedia signal dispose process;
H. finish.
The USB interface multiplexing method of a kind of television set of the present invention; The central processing unit of television set reads menu setting information, and when operating personnel selected serial port function, the serial port function sign was set to 1; When operating personnel did not select serial port function, then the serial port function sign was set to 0.Therefore; The central processing unit of television set is judged the serial port function sign; If serial port function is masked as 1, explain that USB interface will use as serial ports, then the central processing unit of television set is connected switching circuit through the I/O control unit; The signal that USB interface is inserted is connected to the serial port module of main system, carries out serial port function.If serial port function is masked as 0, explain that USB interface does not use as serial ports, the central processing unit of television set breaks off the connection of USB interface to serial port module through the I/O control unit; Make input signal can only be linked into multimedia and handle and the software upgrading module that then main system can judge whether to exist upgrade software, if there is upgrade software; Main system can be jumped out prompting frame; Whether the user can select upgrade software, when the user selects upgrade software, and the central processing unit software upgrade process of television set; When the user selected not upgrade software, this process finished.If there is not upgrade software, will carries out multimedia decoding to input signal and handle.
The invention has the beneficial effects as follows; Owing to adopted and between USB interface and rs 232 serial interface signal processing unit, increased a switching circuit; And being switched on or switched off of this switching circuit controlled with the I/O control unit; When needs use this USB interface as serial ports, connect this switching circuit, the signal that USB interface is inserted can be delivered in the rs 232 serial interface signal processing unit; When not needing this USB interface used as serial ports, break off this switching circuit, make USB interface and rs 232 serial interface signal processing unit be in isolation; The present invention utilizes switching circuit to come being connected between isolated serial port functional process unit and the USB interface; When needs are realized isolating; Through the I/O control unit switching circuit is controlled; Make this USB interface both can be used as the multimedia input interface, can also be multiplexed with serial ports, accomplish the various functions of serial ports.
Compared with prior art, have following beneficial effect:
1, the interface of television set is various at present, through the multiplexing interface of simplifying, reduces the PCB area simultaneously, can reduce the cost of complete machine;
2, the simple switching circuit of controlling through an I/O control unit is isolated the rs 232 serial interface signal and the multi-media signal at a high speed of low speed, and circuit structure is simple and easy to be realized.
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain; But television set and USB interface multiplexing method thereof that a kind of USB interface of the present invention is multiplexing are not limited to embodiment.
Description of drawings
Fig. 1 is the theory diagram of television set of the present invention;
Fig. 2 is the flow chart of method of the present invention.
Embodiment
Embodiment, referring to shown in Figure 1, the multiplexing television set of a kind of USB interface of the present invention comprises: usb 1, multimedia signal dispose unit 2, rs 232 serial interface signal processing unit 3, switching circuit 4, I/O control unit 5, input unit 6 and central processing unit 7; Usb 1 is connected with multimedia signal dispose unit 2; Usb 1 is connected with rs 232 serial interface signal processing unit 3 through switching circuit 4; The output of I/O control unit 5 is connected to the control end of switching circuit 4; Central processing unit 7 is connected with multimedia signal dispose unit 2, rs 232 serial interface signal processing unit 3 and I/O control unit 5 respectively; The output of input unit 6 is connected to central processing unit 7.
Further also comprise software upgrading signal processing unit 8, software upgrading signal processing unit 8 is connected with usb 1, central processing unit 7 respectively.
The multiplexing television set of a kind of USB interface of the present invention; Be that serial ports with television set is that com interface is removed; Realize the com interface function through the multiplexing mode of USB interface, what USB interface transmitted is high speed signal, can be used for connecting the upgrading of multimedia and realization software; Because the USB interface transmission is high speed signal, and impedance matching is had very high requirement; And com interface transmission is low speed signal, when USB interface being multiplexed with serial ports using, transmission this moment be low speed signal, for preventing to influence multimedia and software upgrading function, need to increase a switching circuit 4 and do mutual isolation.And this switching circuit 4; Controlled by I/O control unit 5, when needs were connected being connected of usb 1 and rs 232 serial interface signal processing unit 3, I/O control unit 5 was to control signal of control end transmission of switching circuit 4; Make switching circuit 4 connect; When needs broke off being connected of usb 1 and rs 232 serial interface signal processing unit 3, I/O control unit 5 sent another control signal to the control end of switching circuit 4, made switching circuit 4 disconnections.I/O control unit 5 sends any control signal, and then central processing unit 7 is controlled.
In the use; When needs are the com interface use with usb 1 as serial ports; Television set can show a menu interface that presets, and whether prompting selects serial port function, and operating personnel just can come to the menu interface input information such as corresponding key on remote controller or the television set through input unit; Then; The central processing unit 7 of television set will read menu setting information, and when operating personnel were the selection serial port function, then the central processing unit 7 of television set will send a control signal to the control end of switching circuit 4 through I/O control unit 5; Make switching circuit 4 connect, then the information that inserts of USB interface will be sent to rs 232 serial interface signal processing unit 3 and handles; When operating personnel are not when selecting serial port function; Then the central processing unit 7 of television set will send another control signal to the control end of switching circuit 4 through I/O control unit 5; Make switching circuit 4 break off; Form the mutual isolation between usb 1 and the rs 232 serial interface signal processing unit 3, then the information of usb 1 access will be sent to and go in multimedia signal dispose unit 2 or the software upgrading signal processing unit 8 to handle.
The USB interface multiplexing method of a kind of television set of the present invention; Be between usb 1 and rs 232 serial interface signal processing unit 3, to increase a switching circuit 4; When needs use this usb 1 as serial ports; Connect this switching circuit 4, the signal that usb 1 is inserted can be delivered in the rs 232 serial interface signal processing unit 3; When not needing this usb 1 used as serial ports, break off this switching circuit 4, make usb 1 and rs 232 serial interface signal processing unit 3 be in isolation; And being switched on or switched off of this switching circuit 4 is to be controlled by I/O control unit 5.
Referring to shown in Figure 2, the USB interface multiplexing method of a kind of television set of the present invention comprises the steps:
A. the central processing unit of television set reads menu setting information;
B. the central processing unit of television set judges whether the serial port function sign is 1, and judged result goes to step f for being, otherwise, continue next step;
C. the central processing unit of television set judges whether to exist upgrade software, and judged result continues next step for being, otherwise, go to step g;
D. the central processing unit of television set judges whether to deposit into capable upgrade software, and judged result continues next step for being, otherwise, go to step h;
E. the central processing unit software upgrade processing procedure of television set then goes to step h;
F. the central processing unit of television set is carried out the rs 232 serial interface signal processing procedure, then goes to step h;
G. the central processing unit of television set is carried out the multimedia signal dispose process;
H. finish.
The USB interface multiplexing method of a kind of television set of the present invention; The central processing unit 7 of television set reads menu setting information, and when operating personnel selected serial port function, the serial port function sign was set to 1; When operating personnel did not select serial port function, then the serial port function sign was set to 0.Therefore; 7 pairs of serial port function signs of the central processing unit of television set are judged; If serial port function is masked as 1, explain that usb 1 will use as serial ports, then the central processing unit 7 of television set is connected switching circuit 4 through I/O control unit 5; The signal that usb 1 is inserted is connected to the serial port module of main system, carries out serial port function.If serial port function is masked as 0, explain that usb 1 does not use as serial ports, the central processing unit 7 of television set breaks off the connection of usb 1 to serial port module through I/O control unit 5; Make input signal can only be linked into multimedia and handle and the software upgrading module that then main system can judge whether to exist upgrade software, if there is upgrade software; Main system can be jumped out prompting frame; Whether the user can select upgrade software, when the user selects upgrade software, and the central processing unit 7 software upgrade processes of television set; When the user selected not upgrade software, this process finished.If there is not upgrade software, will carries out multimedia decoding to input signal and handle.
The foregoing description only is used for further specifying multiplexing television set of a kind of USB interface of the present invention and USB interface multiplexing method thereof; But the present invention is not limited to embodiment; Every foundation technical spirit of the present invention all falls in the protection range of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (4)
1. the television set that USB interface is multiplexing is characterized in that: comprising: USB interface, multimedia signal dispose unit, rs 232 serial interface signal processing unit, switching circuit, I/O control unit, input unit and central processing unit; USB interface is connected with the multimedia signal dispose unit; USB interface is connected with the rs 232 serial interface signal processing unit through switching circuit; The output of I/O control unit is connected to the control end of switching circuit; Central processing unit is connected with multimedia signal dispose unit, rs 232 serial interface signal processing unit and I/O control unit respectively; The output of input unit is connected to central processing unit.
2. the multiplexing television set of USB interface according to claim 1 is characterized in that: further also comprise the software upgrading signal processing unit, the software upgrading signal processing unit is connected with USB interface, central processing unit respectively.
3. the USB interface multiplexing method of a television set; It is characterized in that: be between USB interface and rs 232 serial interface signal processing unit, to increase a switching circuit; When needs use this USB interface as serial ports; Connect this switching circuit, the signal that USB interface is inserted can be delivered in the rs 232 serial interface signal processing unit; When not needing this USB interface used as serial ports, break off this switching circuit, make USB interface and rs 232 serial interface signal processing unit be in isolation; And being switched on or switched off of this switching circuit is to be controlled by the I/O control unit.
4. the USB interface multiplexing method of a television set is characterized in that: comprise the steps:
A. the central processing unit of television set reads menu setting information;
B. the central processing unit of television set judges whether the serial port function sign is 1, and judged result goes to step f for being, otherwise, continue next step;
C. the central processing unit of television set judges whether to exist upgrade software, and judged result continues next step for being, otherwise, go to step h;
D. the central processing unit of television set judges whether to deposit into capable upgrade software, and judged result continues next step for being, otherwise, go to step h;
E. the central processing unit software upgrade processing procedure of television set then goes to step h;
F. the central processing unit of television set is carried out the rs 232 serial interface signal processing procedure, then goes to step h;
G. the central processing unit of television set is carried out the multimedia signal dispose process;
H. finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210084555XA CN102655577A (en) | 2012-03-27 | 2012-03-27 | Television with multiplexing of USB (Universal Serial Bus) interface and method for multiplexing USB interface |
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| CN201210084555XA CN102655577A (en) | 2012-03-27 | 2012-03-27 | Television with multiplexing of USB (Universal Serial Bus) interface and method for multiplexing USB interface |
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| CN105100884A (en) * | 2015-08-28 | 2015-11-25 | 青岛海信电器股份有限公司 | Method and device for identifying remote control equipment |
| CN112367248A (en) * | 2020-09-27 | 2021-02-12 | 济南浪潮高新科技投资发展有限公司 | Industrial gateway for realizing custom interface, control method thereof and storage medium |
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Application publication date: 20120905 |