CN105095132A - Electronic device capable of automatically switching Universal Serial Bus master-slave device modes and operating method of electronic device - Google Patents
Electronic device capable of automatically switching Universal Serial Bus master-slave device modes and operating method of electronic device Download PDFInfo
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Abstract
An electronic device capable of automatically switching Universal Serial Bus (USB) master-slave device modes comprises a microprocessor, a USB master-slave mode switching circuit and a USB concentrator. A plurality of external devices are coupled with the microprocessor or the USB concentrator through the USB master-slave mode switching circuit. When the microprocessor does not detect an external signal and the USB master-slave mode switching circuit enables the external devices to be coupled with the microprocessor, the external devices operate in a slave device mode. When the microprocessor detects an external signal and the USB master-slave mode switching circuit enables the external devices to be coupled with the USB concentrator, one external device operates in a master device mode, and the other external devices operate in a slave device mode.
Description
Technical field
The invention relates to a kind of electronic installation, relate to one especially and can to automatically switch the electronic installation of USB (universal serial bus) (UniversalSerialBus, USB) master-slave equipment pattern and method of operating thereof.
Background technology
Due to universal serial bus (UniversalSerialBus, USB) interface specification have plug and play, at most can contact 127 USB device, the electric power of 5V can be provided and only need take the advantages such as an IRQ, and the happiness being subject to numerous users is subject to.
At present, when many electronic installations are undertaken being connected to exchange data by USB interface and different external electronic device, need to be operated in main equipment pattern (HOST) according to the type selecting of accessed external electronic or from equipment mode (DEVICE) state.Like this, when electronic installation is connected by USB interface with external electronic, electronic installation just needs automatically to select to be in main equipment pattern according to connected external electronic or from equipment mode.But at present, the master-slave equipment mode switching circuit structure of existing USB is comparatively complicated, use electronic devices and components many, the consumption too much not only causing manufacturing cost increase but also increase electricity of electronic devices and components.
In view of this, be necessary the switching device shifter that a kind of USB master-slave equipment pattern that automatically switches is provided, can according to different external device types, electronic installation carries out the switching of master-slave equipment pattern automatically.
Summary of the invention
According to an aspect of the present invention, a kind of electronic installation of the USB of automatic switchover master-slave equipment pattern is provided to comprise a microprocessor, a USB master slave mode commutation circuit and a usb hub.Multiple external unit couples microprocessor or usb hub through USB master slave mode commutation circuit.When microprocessor does not detect an external signal, when USB master slave mode commutation circuit makes external unit couple microprocessor, external unit operates in from equipment mode.When microprocessor detects an external signal, USB master slave mode commutation circuit makes external unit couple usb hub, and wherein an external unit operates in main equipment pattern, and remaining external unit operates in from equipment mode.
In one embodiment, USB master slave mode commutation circuit more comprises multiple change-over switch, and each change-over switch is one or three end assemblies, comprises a first end, one second end and one the 3rd end.
In one embodiment, this multiple external unit couples with the 3rd end of change-over switch respectively.
In one embodiment, microprocessor more comprises multiple USB interface, and this multiple USB interface couples with the first end of change-over switch respectively.
In one embodiment, usb hub more comprises a upstream Interface and multiple downstream interface, and wherein upstream Interface and this multiple downstream interface couple with the second end of change-over switch respectively.
In one embodiment, the external unit operating in main equipment pattern couples with the 3rd end of the change-over switch coupling upstream Interface, operates in and couples with the 3rd end of the change-over switch coupling downstream interface respectively from all the other external units of equipment mode.
In one embodiment, external signal is a multi-media signal or a video detecting signal.
In one embodiment, electronic installation, more comprise one first power supply, a second source and at least one device power supply (DPS), wherein the USB power source that provides for microprocessor of the first power supply, the USB power source that second source provides for the external unit operated under main equipment pattern.
In one embodiment, when this multiple external unit operates in from equipment mode, microprocessor sends a power control signal, controls USB power source that the first power supply and at least one device power supply (DPS) provide microprocessor to provide to external unit.
In one embodiment, when this multiple external unit, one of them operates in main equipment pattern, when remaining external unit operates in from equipment mode, microprocessor sends a power control signal, controls second source and at least one device power supply (DPS) and provides for operation in USB power source that the external unit under main equipment pattern provides to operating in the external unit from equipment mode to all the other.
The present invention also provides a kind of method of operating of electronic installation of the USB master-slave equipment pattern that automatically switches.First the capable external signal detecting of Wei Chu Li Qi Jin.Secondly, when not detecting an external signal, the multiple external unit of USB master slave mode commutation circuit couples microprocessor, and wherein this little external unit operates in from equipment mode.And when detecting an external signal, USB master slave mode commutation circuit makes external unit couple a usb hub, and one of them external unit operates in main equipment pattern, and remaining external unit operates in from equipment mode.
Comprehensively above-mentionedly saying, through framework of the present invention, microprocessor according to an external signal control USB master slave mode commutation circuit, can use the external unit mode of operation changed and couple, main equipment pattern or from equipment mode, reaches the object of automatic switchover.
More easily feature & benefits of the present invention will be understood by reference to the following description with claim.Should understand, above description and the following detailed description are only illustrative examples and for further illustrating claim of the present invention, and are not used in limitation category of the present invention.
Accompanying drawing explanation
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, being described as follows of institute's accompanying drawings:
Fig. 1 illustrates and operates in from electronic installation skeleton diagram during equipment mode according to a preferred embodiment of the present invention.
Fig. 2 illustrates and operates in main equipment pattern according to one of them external unit of a preferred embodiment of the present invention, and remaining external unit operates in the electronic installation skeleton diagram from equipment mode.
Fig. 3 illustrates electronic installation skeleton diagram when operating in main equipment pattern according to another preferred embodiment of the present invention.
Fig. 4 illustrates and operates in main equipment pattern according to one of them external unit of another preferred embodiment of the present invention, and remaining external unit operates in from electronic installation skeleton diagram during equipment mode.
Fig. 5 illustrates the operational flowchart according to a preferred embodiment of the present invention automatic switchover USB master-slave equipment pattern.
Description of reference numerals
100 electronic installations
101 microprocessors
102USB master slave mode commutation circuit
103USB hub
105 external signals
106 control signals
107 first ends
108 second ends
109 the 3rd ends
110 first power supplys
111 second sources
112 device power supply (DPS)s
113 first power control signals
114 second source control signals
115 the 3rd power control signals
116 switch-over control signals
117 switches
118 the 4th power control signals
1011,1012 ..., 101nUSB interface
1021,1022 ..., 102nUSB change-over switch
1031 upstream Interfaces
1032,1033 ..., 103n downstream interface
1041,1042 ..., 104n external unit
501-503 step
Embodiment
Below described in detail with appended icon for preferred embodiment of the present invention, following explanation and icon use identical reference number to represent identical or similar assembly, and then give omission in repeated description during identical or similar assembly.
Fig. 1 illustrates the electronic installation skeleton diagram of USB (universal serial bus) (USB) the master-slave equipment pattern that can to automatically switch according to a preferred embodiment of the present invention.This electronic installation 100 comprises microprocessor 101, USB master slave mode commutation circuit 102 and a usb hub 103.Wherein microprocessor 101 comprises multiple usb 1 011,1012 ... 101n, in the present embodiment, each usb 1 011,1012 ... 101n can be the USB interface of MiniUSB interface or type A or type B.USB master slave mode commutation circuit 102 comprises multiple USB change-over switch 1021,1022 ..., 102n.This little usb 1 011,1012 ... 101n respectively through usb bus and corresponding USB change-over switch 1021,1022 ..., 102n couples.Usb hub 103 includes a upstream Interface 1031 and multiple downstream interface 1032,1033 ..., 103n.This little upstream Interface 1031 and downstream interface 1032,1033 ..., 103n also respectively through usb bus and corresponding USB change-over switch 1021,1022 ..., 102n couples.In the present embodiment, each USB change-over switch 1021,1022, ..., 102n is one or three end assemblies, and first end 107 wherein and the USB interface of corresponding microprocessor 101 couple, the corresponding upstream Interface 1031 of the second end 108 and corresponding usb hub 103 and lower shape interface 1032,1033 ..., 103n couples, the external unit 1041 of the 3rd 109, end and a correspondence, 1042 ..., 104n couples.According to this, when USB master slave mode commutation circuit 102 is connected with multiple external unit, can pass through the control signal 106 that microprocessor 101 sends according to an external signal 105, switch USB master slave mode commutation circuit 102, make external unit 1041,1042,104n and microprocessor 101 couple, or couple with usb hub 103, use this little external unit 1041 of conversion, 1042,, the mode of operation of 104n, main equipment pattern or from equipment mode.In the present embodiment, external signal 105 is a video detecting signal or a multi-media signal.
In one embodiment, the upstream Interface 1031 of usb hub 103 couples the second end 108 of USB change-over switch 1021.Now, when microprocessor 101 do not detect external signal 105 input time, microprocessor 101 sends control signal 106, USB master slave mode commutation circuit 102 according to this control signal 106, make external unit 1041,1042 ..., 104n is through the USB change-over switch 1021 of correspondence, 1022, ..., the usb 1 011,1012 of 102n and microprocessor 101 ... 101n couples.According to this, external unit 1041,1042 ..., 104n operates in from equipment mode, as microprocessor 101 from equipment.Wherein, in one embodiment, outer video signal comprises DP, simulation video signal and the digital video signals such as HDMI, VGA, DVI.On the other hand, as shown in Figure 2, when microprocessor 101 detected external signal 105 input time, microprocessor 101 sends control signal 106, USB master slave mode commutation circuit 102 according to this control signal 106, makes external unit 1041,1042 ..., 104n is through the USB change-over switch 1021 of correspondence, 1022, ..., 102n respectively with upstream Interface 1031 and multiple downstream interface 1032,1033 of usb hub 103,, 103n couples.According to this, because the upstream Interface 1031 of usb hub 103 couples with USB change-over switch 1021, remaining USB change-over switch 1022,1023 ..., 102n then couples the downstream interface 1032,1033 of hub 103 ..., 103n.Therefore, through hub 103, external unit 1041 operates in main equipment pattern, as a main equipment, and external unit 1042,1043 ..., 104n operates in from equipment mode, as external unit 1041 from equipment.
Fig. 3 illustrates the electronic installation skeleton diagram of the USB master-slave equipment pattern that can to automatically switch according to another preferred embodiment of the present invention.In this embodiment, electronic installation 100 more comprises one first power supply 110, second source 111, multiple device power supply (DPS) 112 and switch 117.The wherein USB power source that provides for microprocessor 101 of the first power supply 110.The USB power source of second source 111 for providing as the external unit of main equipment.Multiple device power supply (DPS) 112 couples switch 117, one switch-over control signal 116 gauge tap 117, the USB power source that selection microprocessor 101 provides is as multiple device power supply (DPS) 112, or select transmitted by usb hub, the USB power source provided by the external unit as main equipment is as multiple device power supply (DPS) 112.
According to this, when microprocessor 101 do not detect external signal 105 input time, please refer to Fig. 1 and Fig. 3, microprocessor 101 control USB master slave mode commutation circuit 102, makes external unit 1041,1042,, 104n operates in from equipment mode, as microprocessor 101 from equipment.Now microprocessor 101 sends the first power control signal 113, control the first power supply 110 to couple microprocessor 101 usb 1 011 provide USB power source from equipment 1041, a switch-over control signal 116 simultaneously, gauge tap 117, select to control the 3rd power control signal 115 that sends of microprocessor 101 with opertaing device power supply 112 to corresponding external unit 1042,, 104n.
On the other hand, when microprocessor 101 detected external signal 105 input time, please refer to Fig. 2 and Fig. 4, microprocessor 101 control USB master slave mode commutation circuit 102, makes the upstream Interface 1031 of external unit 1041 and usb hub 103 couple, external unit 1042,, the downstream interface 1032,1033 of 104n and usb hub 103,, 103n couples.Wherein, external unit 1041 operates in main equipment pattern, as a main equipment, and external unit 1042,1043 ..., 104n operates in from equipment mode, as external unit 1041 from equipment.Now microprocessor 101 sends second source control signal 114, using the USB power source that provides as the external unit 1041 of main equipment as second source 111, sends usb hub 103 to and produces one the 4th power control signal 118 according to this.Simultaneously switch-over control signal 116, gauge tap 117, the 4th power control signal 118 selecting usb hub 103 to send with opertaing device power supply 112 to corresponding external unit 1042 ..., 104n.
Fig. 5 illustrates the operational flowchart according to a preferred embodiment of the present invention automatic switchover USB master-slave equipment pattern.Please refer to the 1st, 2 figure and Fig. 5.First in step 501, microprocessor carries out an external signal detecting.In one embodiment, external signal 105 is a video detecting signal or a multi-media signal.Then step 502, when microprocessor does not detect an external signal, USB master slave mode commutation circuit makes multiple external unit couple microprocessor, and its peripheral equipment operates in from equipment mode.In one embodiment, when microprocessor 101 does not detect external signal 105, microprocessor 101 sends control signal 106 control USB master slave mode commutation circuit 102, makes external unit 1041,1042,104n through the USB change-over switch 1021,1022 of correspondence ..., the usb 1 011,1012 of 102n and microprocessor 101 ... 101n couples.According to this, external unit 1041,1042 ..., 104n operates in from equipment mode, as microprocessor 101 from equipment.
On the other hand, step 503, when microprocessor detects an external signal, USB master slave mode commutation circuit makes external unit couple a usb hub, and one of them external unit operates in main equipment pattern, and remaining external unit operates in from equipment mode.In one embodiment, when microprocessor 101 detected external signal 105 input time, microprocessor 101 sends control signal 106 control USB master slave mode commutation circuit 102, make external unit 1041,1042 ..., 104n is through the USB change-over switch 1021 of correspondence, 1022, ..., 102n respectively with upstream Interface 1031 and multiple downstream interface 1032,1033 of usb hub 103,, 103n couples.According to this, because the upstream Interface 1031 of usb hub 103 couples with USB change-over switch 1021, remaining USB change-over switch 1022,1023 ..., 102n then couples the downstream interface 1032,1033 of hub 103 ..., 103n.Therefore, through hub 103, external unit 1041 operates in main equipment pattern, as a main equipment, and external unit 1042,1043 ..., 104n operates in from equipment mode, as external unit 1041 from equipment.
Comprehensively above-mentionedly to say, through framework of the present invention, microprocessor according to the output control USB master slave mode commutation circuit of detecting one external signal, can use the external unit mode of operation changed and couple, main equipment pattern or from equipment mode, reaches the object of automatic switchover.
Although the present invention discloses as above with embodiment; so itself and be not used to limit the present invention, anyly have the knack of this those skilled in the art, without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations, therefore protection scope of the present invention is when being as the criterion depending on the accompanying claim person of defining.
Claims (10)
1. an electronic installation for the USB (universal serial bus) that can automatically switch (USB) master-slave equipment pattern, at least comprises:
One microprocessor;
One usb hub; And
One USB master slave mode commutation circuit ， Fen Do couples this microprocessor and this usb hub, in order to make multiple external unit couple this microprocessor or this usb hub through described USB master slave mode commutation circuit,
Wherein when described microprocessor does not detect an external signal, described USB master slave mode commutation circuit makes described multiple external unit couple described microprocessor, and described multiple external unit operates in from equipment mode, and
When described microprocessor detects an external signal, switching described USB master slave mode commutation circuit makes described multiple external unit couple described usb hub, described multiple external unit one of them operate in main equipment pattern, remaining external unit operates in from equipment mode.
2. the electronic installation of the USB master-slave equipment pattern that can automatically switch as claimed in claim 1, it is characterized in that, described USB master slave mode commutation circuit comprises multiple change-over switch, each change-over switch is one or three end assemblies, comprise a first end, one second end and one the 3rd end, wherein said multiple external unit couples with the 3rd end of described multiple change-over switch respectively.
3. the electronic installation of the USB master-slave equipment pattern that can automatically switch as claimed in claim 2, it is characterized in that, described microprocessor more comprises multiple USB interface, and wherein said multiple USB interface couples with the first end of described multiple change-over switch respectively.
4. the electronic installation of the USB master-slave equipment pattern that can automatically switch as claimed in claim 3, it is characterized in that, described usb hub comprises a upstream Interface and multiple downstream interface, and wherein said upstream Interface and described multiple downstream interface couple with the second end of described multiple change-over switch respectively.
5. the electronic installation of the USB master-slave equipment pattern that can automatically switch as claimed in claim 4, it is characterized in that, 3rd end of the described external unit operating in main equipment pattern and the described change-over switch coupling described upstream Interface couples, operate in from equipment mode all the other described in multiple external unit respectively and the 3rd end of the described multiple change-over switch coupling described multiple lower shape interface couple.
6. the electronic installation of the USB master-slave equipment pattern that can automatically switch as claimed in claim 1, is characterized in that, described external signal is a multi-media signal or a video detecting signal.
7. the electronic installation of the USB master-slave equipment pattern that can automatically switch as claimed in claim 1, it is characterized in that, more comprise one first power supply, a second source and at least one device power supply (DPS), the USB power source that wherein said first power supply provides for this microprocessor, the USB power source that described second source provides for the described external unit operated under main equipment pattern.
8. the electronic installation of the USB master-slave equipment pattern that can automatically switch as claimed in claim 7, it is characterized in that, when described multiple external unit operates in from equipment mode, described microprocessor sends a power control signal, controls USB power source that described first power supply and at least one device power supply (DPS) described provide described microprocessor to provide to described multiple external unit.
9. the electronic installation of the USB master-slave equipment pattern that can automatically switch as claimed in claim 7, it is characterized in that, when described multiple external unit, one of them operates in main equipment pattern, when described in remaining, multiple external unit operates in from equipment mode, described microprocessor sends a power control signal, controls described second source and at least one device power supply (DPS) described and provides for operation in the USB power source that the described external unit under main equipment pattern provides all the other operate in the described multiple external unit from equipment mode to this.
10. a method of operating for the electronic installation of claim 1, at least comprises:
Described microprocessor carries out described external signal detecting;
When not detecting described external signal, described USB master slave mode commutation circuit makes described multiple external unit couple described microprocessor, and described multiple external unit operates in from equipment mode; And
When detecting an external signal, described USB master slave mode commutation circuit makes described multiple external unit couple described usb hub, described multiple external unit one of them operate in main equipment pattern, remaining external unit operates in from equipment mode.
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| CN201410181039.8A CN105095132B (en) | 2014-04-30 | 2014-04-30 | The electronic installation and its operating method for the USB master-slave equipment pattern that can automatically switch |
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| CN201410181039.8A CN105095132B (en) | 2014-04-30 | 2014-04-30 | The electronic installation and its operating method for the USB master-slave equipment pattern that can automatically switch |
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| CN107318037A (en) * | 2016-04-26 | 2017-11-03 | 宏碁股份有限公司 | Electronic installation and image transmission control method |
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| CN108959141A (en) * | 2018-06-11 | 2018-12-07 | 广州视源电子科技股份有限公司 | USB interface system, method, apparatus, device and storage medium for allocating USB bandwidth |
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| WO2020237635A1 (en) * | 2019-05-31 | 2020-12-03 | 华为技术有限公司 | Interface assembly, chip, and electronic device |
| CN113656342A (en) * | 2021-08-24 | 2021-11-16 | 深圳市康冠商用科技有限公司 | USB interface switching control method and device, all-in-one machine equipment and storage medium |
| CN113688077A (en) * | 2020-05-19 | 2021-11-23 | 智原科技股份有限公司 | Switching device |
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