CN103237189B - Electronic equipment, MHL connector, MHL system and connector detection method - Google Patents
Electronic equipment, MHL connector, MHL system and connector detection method Download PDFInfo
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- CN103237189B CN103237189B CN201310100274.3A CN201310100274A CN103237189B CN 103237189 B CN103237189 B CN 103237189B CN 201310100274 A CN201310100274 A CN 201310100274A CN 103237189 B CN103237189 B CN 103237189B
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Abstract
The invention discloses a kind of electronic equipment, MHL connector, MHL system and connector detection method, belong to electronic technology field.Described electronic equipment also comprises: by the first switch of MHL chip controls and the second switch that controlled by described processor; One end and the processor of the first switch are electrical connected, and the detection terminal ID in the other end of the first switch and USB interface is electrical connected; One end and the processor of second switch are electrical connected, and the detection terminal ID in the other end of second switch and USB interface is electrical connected.The present invention obtains identification signal according to the first switch on electronic equipment and/or second switch from detection terminal ID, and then select allow or forbid with MHL mode output sound vision signal according to the identification signal got, solving electronic equipment at will uses MHL connector can cause the poor problem of video signal quality exported, reach only when predetermined MHL connector being detected ability output sound vision signal to ensure the effect of signal transmission quality.
Description
Technical field
The present invention relates to electronic technology field, particularly a kind of electronic equipment, MHL connector, MHL system and connector detection method.
Background technology
MHL (MobileHigh-DefinitionLink, mobile terminal high-definition audio and video standard interface) be a kind of audio-visual standard interface connecting portable consumer electronic device, MHL has only used existing MicroUSB interface, by HDMI, USB interface, charging inlet three mouthfuls unification, effectively reduce the interface number on equipment.
When using MHL, mobile phone can first be connected with MHL connector, and then MHL connector is connected with another electronic equipment of such as TV and so on again, and the signal on mobile phone can directly be outputted on another electronic equipment.But different MHL connectors is distinguishing, such as, some MHL connector needs electronic equipment to power when being connected with electronic equipment, some does not then need; And voltage required between the MHL connector needing electronic equipment to carry out powering also is not quite similar.Different electronic equipments is also different to the requirement of MHL connector, and some electronic equipment achieves over-voltage protecting function on MHL power supply circuits; Some does not then have, and needs to realize this function on MHL connector.
Realizing in process of the present invention, inventor finds that background technology at least exists following problem: because the requirement of different electronic equipments to MHL connector is different, if an electronic equipment does not use the MHL connector of genuine adaptation, and at will use other MHL connector, the problem such as audio-video signal is of poor quality of job insecurity, output may be there is.
Summary of the invention
In order to solve the ropy problem of audio-video signal of job insecurity that electronic equipment at will uses MHL connector to occur, output, embodiments provide a kind of electronic equipment, MHL connector, MHL system and connector detection method.Described technical scheme is as follows:
First aspect, provides a kind of electronic equipment, and comprise processor, mobile terminal high-definition audio and video standard interface MHL chip, general-purpose serial bus USB diverter switch, USB interface and power subsystem, described equipment, also comprises:
By the first switch of described MHL chip controls and the second switch that controlled by described processor;
One end and the described processor of described first switch are electrical connected, detection terminal ID in the other end of described first switch and described USB interface is electrical connected, described first switch is used for when described USB interface is connected with the miscellaneous equipment of non-MHL connector, makes described processor get identification signal on described detection terminal ID;
One end and the described processor of described second switch are electrical connected, detection terminal ID in the other end of described second switch and described USB interface is electrical connected, described second switch is used for when described USB interface is connected with MHL connector, described processor is got, and whether described detection terminal ID be the identification signal of predetermined MHL connector for characterizing, so that described processor is selected allow or forbid with MHL mode output sound vision signal according to described identification signal;
Wherein, be the described identification signal of predetermined MHL connector be the predetermined enciphered message exported by the encryption chip in described predetermined MHL connector for characterizing.
Further, described processor and described MHL chip are electrical connected, described processor is also electrical connected respectively by being in the first data terminal D+ in the described USB diverter switch of the first conducting state and described USB interface and the second data terminal D-, and described processor is also electrical connected with described power management chip;
The control end of described MHL chip and described USB diverter switch is electrical connected, and described MHL chip is also electrical connected respectively by being in the first data terminal D+ in the described USB diverter switch of the second conducting state and described USB interface and the second data terminal D-;
Power supply terminal VBUS in described power subsystem and described USB interface is electrical connected.
Second aspect, provides a kind of MHL connector, and comprise mobile terminal high-definition audio and video standard interface MHL chip and general-purpose serial bus USB interface, described connector, also comprises:
3rd switch, earth resistance and encryption chip;
Power supply terminal VBUS in the control end of described 3rd switch and described USB interface is electrical connected, detection terminal ID in one end of described 3rd switch and described USB interface is electrical connected, the other end of described 3rd switch when being in the first switching state and one end of described earth resistance be electrical connected; The other end of described 3rd switch when being in the second switching state and described encryption chip be electrical connected;
Power supply terminal VBUS in described encryption chip and described USB interface is electrical connected, described encryption chip is used for when described USB interface is connected with electronic equipment, export for characterizing the identification signal that described connector is predetermined MHL connector, so that the processor in described electronic equipment is selected allow or forbid with MHL mode output sound vision signal according to described identification signal;
The other end ground connection of described earth resistance.
Further, described connector also comprises pull-up resistor, and described encryption chip is also electrical connected by the power supply terminal VBUS in described pull-up resistor and described USB interface.
Further, when the power supply terminal VBUS in described USB interface is low level, described 3rd switch is in the first switching state; When the power supply terminal VBUS in described USB interface is high level, described 3rd switch is in the second switching state.
The third aspect, provide a kind of MHL system, described system comprises:
Electronic equipment and the MHL connector be electrical connected with described electronic equipment;
Described electronic equipment is the electronic equipment as above described in first aspect;
Described MHL connector is the MHL connector as above described in second aspect.
Fourth aspect, provides a kind of connector detection method, and in the electronic equipment described in first aspect, described method comprises:
Obtain the identification signal on described detection terminal ID by the on off state controlling described first switch and/or second switch, judge according to the described identification signal got whether the connector of the current connection of described USB interface is predetermined mobile terminal high-definition audio and video standard interface MHL connector;
If judged result is the connector of the current connection of described USB interface is predetermined MHL connector, then allow with MHL mode outputting video signal;
If judged result is the connector of the current connection of described USB interface is not predetermined MHL connector, then forbid with MHL mode outputting video signal;
Wherein, in the described identification signal got, be the identification signal of predetermined MHL connector be the predetermined enciphered message exported by the encryption chip in predetermined MHL connector for characterizing.
Further, whether the described connector judging the current connection of described USB interface is predetermined mobile terminal high-definition audio and video standard interface MHL connector, comprising:
Obtain the identification signal on described detection terminal ID by the on off state controlling described first switch and/or second switch, judge according to the described identification signal got whether the connector of the current connection of described USB interface is predetermined mobile terminal high-definition audio and video standard interface MHL connector.
Further, the described on off state by controlling described first switch and/or second switch obtains the identification signal on described detection terminal ID, whether the connector judging the current connection of described USB interface according to the described identification signal got is predetermined mobile terminal high-definition audio and video standard interface MHL connector, comprising:
Whether be the first predetermined voltage by the voltage on the detection terminal ID in USB interface described in described MHL chip detection;
If the testing result of described MHL chip is the voltage on the detection terminal ID in described USB interface is the first predetermined voltage, be then in cut-off state by the first switch described in described MHL chip controls; The second conducting state is in by USB diverter switch described in described MHL chip controls; Interrupt signal is sent to described processor by described MHL chip;
After described processor receives described interrupt signal, detected the state information of described MHL chip by described processor;
If the connector that the state information that the testing result of described processor is described MHL chip is current connection is MHL connector, then controls described second switch by described processor and be in conducting state; Control described power subsystem by described processor and export high level to described power supply terminal VBUS;
Identification signal is obtained from described detection terminal ID by described processor;
If described processor is predetermined enciphered message from the identification signal that described detection terminal ID gets, be then judged to be that the connector of the current connection of described USB interface is predetermined MHL connector;
If described processor is not predetermined enciphered message from the identification signal that described detection terminal ID gets, or described processor does not get identification signal from described detection terminal ID, be then judged to be that the connector of the current connection of described USB interface is not predetermined MHL connector.
Further, the described on off state by controlling described first switch and/or second switch obtains the identification signal on described detection terminal ID, whether the connector judging the current connection of described USB interface according to the described identification signal got is predetermined mobile terminal high-definition audio and video standard interface MHL connector, comprising:
Whether the voltage detected on described power supply terminal VBUS by described power subsystem is high level;
Whether the voltage detected on described detection terminal ID by described processor is dragged down is the second predetermined voltage;
If the testing result of described power subsystem is the voltage on described power supply terminal VBUS is high level, and the testing result of described processor is voltage on described detection terminal ID, and not dragged down be the second predetermined voltage; Then control described second switch by described processor and be in conducting state;
Identification signal is obtained from described detection terminal ID by described processor;
If described processor is predetermined enciphered message from the identification signal that described detection terminal ID gets, be then judged to be that the connector of the current connection of described USB interface is predetermined MHL connector;
If described processor is not predetermined enciphered message from the identification signal that described detection terminal ID gets, or described processor does not get identification signal from described detection terminal ID, be then judged to be that the connector of the current connection of described USB interface is not predetermined MHL connector.
Further, the described on off state by controlling described first switch and/or second switch obtains the identification signal on described detection terminal ID, whether the connector judging the current connection of described USB interface according to the described identification signal got is predetermined mobile terminal high-definition audio and video standard interface MHL connector, comprising:
Whether be the second predetermined voltage by the voltage on the detection terminal ID in USB interface described in described MHL chip detection;
If the testing result of described MHL chip is the voltage on the detection terminal ID in described USB interface is the second predetermined voltage, be then in the first conducting state by USB diverter switch described in described MHL chip controls; Be in conducting state by the first switch described in described MHL chip controls, make described processor get described second predetermined voltage as identification signal from described detection terminal ID; Control described power subsystem by described processor and export high level to described power supply terminal VBUS; And be judged to be that the connector of the current connection of described USB interface is not predetermined MHL connector.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
Identification signal is obtained from detection terminal ID according to the first switch on electronic equipment and/or second switch, and then select allow or forbid with MHL mode output sound vision signal according to the identification signal got, solve the ropy problem of audio-video signal of job insecurity that electronic equipment at will uses MHL connector to occur, output, reach electronic equipment only when the MHL connector current connection being detected is predetermined MHL connector just output sound vision signal to ensure the effect of good signal transmission quality.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of electronic apparatus system;
Fig. 2 is the structural representation of the electronic equipment that the embodiment of the present invention one provides;
Fig. 3 is the structural representation of the MHL connector that the embodiment of the present invention two provides;
Fig. 4 is the structural representation of the MHL system that the embodiment of the present invention three provides;
Fig. 5 is the method flow diagram of the connector detection method that the embodiment of the present invention four provides;
Fig. 6 is the method flow diagram of the connector detection method that the embodiment of the present invention five provides;
Fig. 7 is the implementation environment figure of the connector detection method that the embodiment of the present invention five provides;
Fig. 8 is the method flow diagram of the connector detection method that the embodiment of the present invention six provides;
Fig. 9 is the implementation environment figure of the connector detection method that the embodiment of the present invention six provides;
Figure 10 is the method flow diagram of the connector detection method that the embodiment of the present invention seven provides;
Figure 11 is the implementation environment figure of the connector detection method that the embodiment of the present invention seven provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Please refer to Fig. 1, it illustrates a kind of structural representation of electronic apparatus system.This electronic apparatus system comprises: electronic equipment 120, MHL connector 140 and playback equipment 160.
Electronic equipment 120, comprises processor 121, MHL chip 122, USB diverter switch 123, usb 1 24 and power subsystem 125.
Processor 121 and MHL chip 122 are electrical connected, processor is also electrical connected with the first data terminal D+ in usb 1 24 and the second data terminal D-respectively by the described USB diverter switch 123 being in the first conducting state, and processor 121 is also electrical connected with power subsystem 125; Processor 121 is for controlling and processing the signal in electronic equipment 120.
MHL chip 122 is electrical connected with the control end of USB diverter switch 123, and MHL chip 122 is also electrical connected with the first data terminal D+ in usb 1 24 and the second data terminal D-respectively by the USB diverter switch 123 being in the second conducting state; HDMI (the HighDefinitionMultimediaInterface of MHL chip 122 for processor 121 is exported, HDMI (High Definition Multimedia Interface)) signal is converted to MHL signal, then MHL signal exported to MHL connector 140 by usb 1 24.
USB diverter switch 123, when usb 1 24 is with OTG (On-The-Go) equipment connection, is in the first conducting state, usb 1 24 is used as common USB interface.USB diverter switch 123, when usb 1 24 is connected with MHL connector 140, is in the second conducting state, and usb 1 24 is used as MHL interface.Specifically, the detection terminal ID of OTG equipment is directly grounded, and the detection terminal ID of MHL connector 140 is the earth resistance R1 being 1K by resistance carrys out ground connection, what electronic equipment 120 can distinguish current connection according to the voltage on detection terminal ID is OTG equipment or MHL connector 140.
Usb 1 24 comprises power supply terminal VBUS, the first data terminal D+, the second data terminal D-, detection terminal ID and earth terminal GND.
Power subsystem 125 provides power supply for giving the power supply terminal VBUS in usb 1 24, to power to MHL connector 140, power subsystem 125 can be PMU (powermanagementunit, Power Management Unit) in an out-put supply, also can be independent DC-DC (DC-to-DC) power supply.
MHL connector 140, comprises MHL chip 141 and usb 1 42.
Usb 1 42 is for being connected with electronic equipment 120 by USB connecting line.Usb 1 42 also comprises power supply terminal VBUS, the first data terminal D+, the second data terminal D-, detection terminal ID and earth terminal GND.
MHL chip 141 is converted to HDMI signal for the MHL signal transmitted by electronic equipment 120.
Playback equipment 160 transmits for playing MHL connector 140 the HDMI signal of coming.
As one of the Focal point and difficult point of the embodiment of the present invention, the embodiment of the present invention is improved above-mentioned electronic apparatus system, have whether the MHL connector detecting current connection is the electronic equipment of the measuring ability of predetermined MHL connector and corresponding MHL connector by providing to include, realize only when the MHL connector current connection being detected is predetermined MHL just output sound vision signal to ensure the object of good signal transmission quality.
Embodiment one
Please refer to Fig. 2, it illustrates the structural representation of the electronic equipment that the embodiment of the present invention one provides.This electronic equipment, comprising:
Processor 201, MHL chip 202, USB diverter switch 203, USB interface 204, power subsystem 205, the first switch S 1 controlled by MHL chip 202 and the second switch S2 controlled by processor 201.
One end and the processor 201 of the first switch S 1 are electrical connected, detection terminal ID in the other end of the first switch S 1 and USB interface 204 is electrical connected, first switch S 1, for when USB interface 204 is connected with the miscellaneous equipment of non-MHL connector, makes processor 201 get identification signal on detection terminal ID;
One end and the processor 201 of second switch S2 are electrical connected, detection terminal ID in the other end of second switch S2 and USB interface 204 is electrical connected, second switch S2 is used for when USB interface 204 is connected with MHL connector, processor 201 is got, and whether detection terminal ID be the identification signal of predetermined MHL connector for characterizing, so that described processor is selected to allow or forbid with MHL mode output sound vision signal according to described identification signal.
In sum, the electronic equipment that the present embodiment provides, identification signal is obtained from detection terminal ID by the first switch and/or second switch, and then select allow or forbid with MHL mode output sound vision signal according to the identification signal got, solve the job insecurity that electronic equipment at will uses MHL connector to occur, the ropy problem of audio-video signal exported, reach electronic equipment only when the MHL connector current connection being detected is predetermined MHL connector just output sound vision signal to ensure the effect of good signal transmission quality.
Embodiment two
Please refer to Fig. 3, it illustrates the structural representation of the MHL connector that the embodiment of the present invention two provides.This MHL connector, comprising:
MHL chip 301, USB interface 302, the 3rd switch S 3, earth resistance R1 and encryption chip 303.
Power supply terminal VBUS in the control end of the 3rd switch S 3 and USB interface 302 is electrical connected, detection terminal ID in one end of 3rd switch S 3 and USB interface 302 is electrical connected, the other end of the 3rd switch S 3 when being in the first switching state and one end of earth resistance R1 be electrical connected; The other end of the 3rd switch S 3 when being in the second switching state and encryption chip 303 be electrical connected.The other end ground connection of earth resistance R1.
Encryption chip 303 is electrical connected with the power supply terminal VBUS in USB interface 302, encryption chip 303 is for when USB interface 302 is connected with electronic equipment, export for characterizing the identification signal that this connector is predetermined MHL connector, so that the processor in electronic equipment is selected to allow or forbid with MHL mode output sound vision signal according to this identification signal.
In sum, the MHL connector that the embodiment of the present invention provides adds encryption chip, this encryption chip is used for when USB interface is connected with electronic equipment, export for characterizing the identification signal that this connector is predetermined MHL connector, so that the processor in electronic equipment is selected allow or forbid with MHL mode output sound vision signal according to this identification signal, solve the job insecurity that electronic equipment at will uses MHL connector to occur, the ropy problem of audio-video signal exported, reach electronic equipment only when the MHL connector current connection being detected is predetermined MHL connector just output sound vision signal to ensure the effect of good signal transmission quality.
Embodiment three
Please refer to Fig. 4, it illustrates the structural representation of the MHL system that the embodiment of the present invention three provides.This MHL system, comprising: electronic equipment 420, MHL connector 440 and playback equipment 460.
Electronic equipment 420, comprising: processor 421, MHL chip 422, USB diverter switch 423, USB interface 424, power subsystem 425, the first switch S 1 controlled by MHL chip 422 and the second switch S2 controlled by processor 421.Wherein:
Processor 421 and MHL chip 422 are electrical connected, processor 421 is also electrical connected with the first data terminal D+ in USB interface 424 and the second data terminal D-respectively by the USB diverter switch 423 being in the first conducting state, and processor 421 is also electrical connected with power subsystem 425.
MHL chip 422 is electrical connected with the control end of USB diverter switch 423, and MHL chip 422 is also electrical connected with the first data terminal D+ in USB interface 424 and the second data terminal D-respectively by the USB diverter switch 423 being in the second conducting state.
One end and the processor 421 of the first switch S 1 are electrical connected, and the detection terminal ID in the other end of the first switch S 1 and USB interface 424 is electrical connected.First switch S 1 switches between conducting and cut-off state according to the control signal of MHL chip 222.First switch S 1, for when USB interface 424 is connected with the miscellaneous equipment of non-MHL connector, makes processor 421 get identification signal on detection terminal ID.
One end and the processor 421 of second switch S2 are electrical connected, and the detection terminal ID in the other end of second switch S2 and USB interface 424 is electrical connected.Second switch S2 switches between conducting and cut-off state according to the control signal of processor 421, second switch S2 is used for when USB interface 424 is connected with MHL connector, processor 421 is got, and whether detection terminal ID be the identification signal of predetermined MHL connector for characterizing, so that processor 421 is selected to allow or forbid with MHL mode output sound vision signal according to identification signal.
USB diverter switch 423, when USB interface 424 is with OTG (On-The-Go) equipment connection, is in the first conducting state, USB interface 424 is used as common USB interface.USB diverter switch 423, when USB interface 424 is connected with MHL connector 440, is in the second conducting state, and USB interface 424 is used as MHL interface.Specifically, the detection terminal ID of OTG equipment is directly grounded, and the detection terminal ID of MHL connector 440 is the earth resistance R1 being generally 1K by resistance carrys out ground connection, what electronic equipment 420 can distinguish current connection according to the voltage on detection terminal ID is OTG equipment or MHL connector 440.
USB interface 424 comprises power supply terminal VBUS, the first data terminal D+, the second data terminal D-, detection terminal ID and earth terminal GND.
Power subsystem 425 provides power supply for giving the power supply terminal VBUS in USB interface 424, to power to MHL connector 440, power subsystem 425 can be PMU (powermanagementunit, Power Management Unit) in an out-put supply, also can be independent DC-DC (DC-to-DC) power supply.
MHL connector 440, comprising: MHL chip 441, USB interface 442, the 3rd switch S 3, earth resistance R1, pull-up resistor R2 and encryption chip 443.
USB interface 442 also comprises power supply terminal VBUS, the first data terminal D+, the second data terminal D-, detection terminal ID and earth terminal GND.Wherein, the first data terminal D+ is connected with MHL chip 441 with the second data terminal D-.
Power supply terminal VBUS in the control end of the 3rd switch S 3 and USB interface 442 is electrical connected, detection terminal ID in one end of 3rd switch S 3 and USB interface 442 is electrical connected, the other end of the 3rd switch S 3 when being in the first switching state and one end of earth resistance R1 be electrical connected, the other end ground connection of earth resistance R1; The other end of the 3rd switch S 3 when being in the second switching state and encryption chip 443 be electrical connected.When the power supply terminal VBUS in USB interface 442 is low level, the 3rd switch S 3 is in the first switching state; When the power supply terminal VBUS in USB interface 442 is high level, the 3rd switch S 3 is in the second switching state.
Encryption chip 443 is electrical connected with the power supply terminal VBUS in USB interface 442.Because encryption chip 443 can be divided into inside to include the encryption chip of pull-up resistor and the inner encryption chip not including pull-up resistor.When encryption chip 443 be inner do not include the encryption chip of pull-up resistor time, also include pull-up resistor R2 in MHL connector 440, encryption chip 443 is also electrical connected by the power supply terminal VBUS in pull-up resistor R2 and USB interface.The resistance of pull-up resistor R2 can be 100K.Encryption chip 443 is for when USB interface 442 is connected with electronic equipment, export for characterizing the identification signal that connector is predetermined MHL connector, so that the processor in electronic equipment is selected to allow or forbid with MHL mode output sound vision signal according to identification signal.
It should be noted that, MHL connector 440 can be powered by electronic equipment 420, and MHL connector 440 also can be powered by external power supply.Divide with this, can be divided into: by the MHL connector of power electronic equipment and the MHL connector two kinds of being powered by external power supply.
When specific works, electronic equipment 420 can obtain the signal from MHL connector 420 on detection terminal ID by the on off state controlling the first switch S 1 and second switch S3, this signal can be the signal that encryption chip exports, and then according to the signal got, electronic equipment 420 judges whether the connector of current connection in USB interface 424 is predetermined mobile terminal high-definition audio and video standard interface MHL connector.If so, then output sound vision signal is allowed; If not, then output sound vision signal is forbidden.
Playback equipment 460 transmits for playing MHL connector 440 the HDMI signal of coming.
In sum, the MHL system that the embodiment of the present invention provides, electronic equipment obtains identification signal by the first switch and/or second switch from detection terminal ID, and then select allow or forbid with MHL mode output sound vision signal according to the identification signal got, and MHL connector is exported for characterizing the identification signal that connector is predetermined MHL connector by encryption chip; Solve the ropy problem of audio-video signal of job insecurity that electronic equipment at will uses MHL connector to occur, output, reach electronic equipment only when the MHL connector current connection being detected is predetermined MHL connector just output sound vision signal to ensure the effect of good signal transmission quality.
Embodiment four
Please refer to Fig. 5, it illustrates the method flow diagram of the connector detection method that the embodiment of the present invention four provides.The present embodiment is applied in the electronic equipment that embodiment one or embodiment three provide with this connector detection method, and illustrates using the MHL connector that embodiment two or embodiment three provide as predetermined MHL connector.This connector detection method, comprising:
Step 502, judges whether the connector of the current connection of USB interface is predetermined MHL connector;
Electronic equipment judges whether the connector of the current connection of USB interface is predetermined MHL connector.Owing to being provided with the first switch S 1 and second switch S2 that are connected with detection terminal ID in electronic equipment, electronic equipment can obtain the identification signal on detection terminal ID by the on off state controlling the first switch S 1 and second switch S2, this identification signal got can be the enciphered message that encryption chip exports, and then according to the identification signal got, electronic equipment judges whether the connector of the current connection of USB interface is predetermined mobile terminal high-definition audio and video standard interface MHL connector.
Step 504, if the connector that judged result is the current connection of USB interface is predetermined MHL connector, then allows with MHL mode outputting video signal;
If electronic equipment judged result is the connector of the current connection of USB interface is predetermined MHL connector, then allow with MHL mode outputting video signal.
Step 506, if the connector that judged result is the current connection of USB interface is not predetermined MHL connector, then forbids with MHL mode outputting video signal;
If electronic equipment judged result is the connector of the current connection of USB interface is not predetermined MHL connector, then forbid with MHL mode outputting video signal.
In sum, the connector detection method that the embodiment of the present invention provides, make electronic equipment can obtain identification signal by the first switch and/or second switch from detection terminal ID, and then select allow or forbid with MHL mode output sound vision signal according to the identification signal got, solve the job insecurity that electronic equipment at will uses MHL connector to occur, the ropy problem of audio-video signal exported, reach electronic equipment only when the MHL connector current connection being detected is predetermined MHL connector just output sound vision signal to ensure the effect of good signal transmission quality.
Embodiment five
Please refer to Fig. 6, it illustrates the method flow diagram of the connector detection method that the embodiment of the present invention five provides.As the more preferred embodiment provided based on embodiment four, the present embodiment is applied in the electronic equipment that embodiment one or embodiment three provide with this connector detection method, and what this electronic equipment connected is not predetermined MHL connector, but a common OTG connector illustrates.This connector detection method, comprising:
Whether step 601 is the second predetermined voltage by the voltage on the detection terminal ID in MHL chip detection USB interface;
Composition graphs 7 is known, when the USB interface 424 of electronic equipment 420 has aerial lug to access time, whether the voltage that electronic equipment 420 is detected by MHL chip 422 on the detection terminal ID in USB interface 424 is the second predetermined voltage, and the second predetermined voltage is the directly grounded earthed voltage of detection terminal ID.Whether namely detect external equipment is OTG connector 430.
Step 602, if the testing result of MHL chip is voltage on detection terminal ID in USB interface is the second predetermined voltage, is then in the first conducting state by MHL chip controls USB diverter switch;
If the testing result of MHL chip 422 is the voltage on the detection terminal ID in USB interface 424 is the second predetermined voltage, namely detect that the voltage on the detection terminal ID in USB interface 424 is the directly grounded earthed voltage of detection terminal ID, then illustrate that the connector of current connection is OTG connector 430, so electronic equipment 420 is in the first conducting state by MHL chip 424 control USB diverter switch 823, and processor 421 is electrical connected respectively by the first data terminal D+ in USB diverter switch 423 and USB interface 424 and the second data terminal D-.Thus USB interface 424 can be used as common USB interface, allow between electronic equipment 420 and OTG equipment 460 and communicate.
Step 603, is in conducting state by MHL chip controls first switch, makes processor get the second predetermined voltage as identification signal from detection terminal ID;
Electronic equipment 420 controls the first switch S 1 by MHL chip 422 and is in conducting state, the detection terminal ID of processor 421 and USB interface 424 is electrical connected, and gets the second predetermined voltage as identification signal from detection terminal ID.
Step 604, controls power subsystem by processor and exports high level to power supply terminal VBUS;
After the ID detection terminal of processor 421 and USB interface 424 is electrical connected, after receiving the ground signalling of ID detection terminal of USB interface 424, electronic equipment 420 controls power subsystem 425 by processor 421 and exports high level to power supply terminal VBUS.Namely after detecting that aerial lug is OTG connector 430, electronic equipment 420 controls power subsystem 425 and exports high level to power supply terminal VBUS, power to OTG connector 430.
Step 605, is judged to be that the connector of the current connection of USB interface is not predetermined MHL connector;
Electronic equipment 420 judges that the connector of the current connection of USB interface 424 is not predetermined MHL connector.
Step 606, forbids with MHL mode output sound vision signal.
Electronic equipment 420 is forbidden with MHL mode output sound vision signal.
In sum, the connector detection method that the embodiment of the present invention provides, the identification signal on detection terminal ID is obtained by the on off state controlling the first switch, and then whether be predetermined MHL connector according to the identification signal obtained if detecting connected MHL connector, to select whether allow or forbid with MHL mode output sound vision signal, solve the job insecurity that electronic equipment at will uses MHL connector to occur, the ropy problem of audio-video signal exported, reach the electronic equipment only just output sound vision signal when the MHL connector current connection being detected is predetermined MHL connector, to ensure the effect of good signal transmission quality.
Embodiment six
Please refer to Fig. 8, it illustrates the method flow diagram of the connector detection method that the embodiment of the present invention six provides.As the more preferred embodiment provided based on embodiment four, the present embodiment is applied in the electronic equipment that embodiment one or embodiment three provide with this connector detection method, and the embodiment two that this electronic equipment connects or the predetermined MHL connector that provides of embodiment three, and this predetermined MHL connector is the MHL connector of being powered by external power supply illustrates.This connector detection method, comprising:
Step 801, whether the voltage detected on power supply terminal VBUS by power subsystem is high level;
Composition graphs 9, for MHL connector 440, power owing to there is external power supply, then the voltage on power supply terminal VBUS is high level.When the USB interface 424 of electronic equipment 420 has aerial lug to access time, whether the voltage that electronic equipment 420 is detected in USB interface 424 on power supply terminal VBUS by power subsystem 425 is high level.If the testing result of power subsystem 425 is the voltage in USB interface 424 on power supply terminal VBUS is high level, then power subsystem 425 can send interrupt signal to processor 421.
Step 802, whether dragged down by the processor voltage detected on detection terminal ID is the second predetermined voltage;
Whether electronic equipment 420 voltage also detected by processor 421 on the detection terminal ID in USB interface 424 is dragged down is the second predetermined voltage.In the present embodiment, the second predetermined voltage is the directly grounded earthed voltage of detection terminal ID.
It should be noted that, step 820 can trigger when the testing result of step 801 be voltage on power supply terminal VBUS is high level and perform.
Step 803, if the testing result of power subsystem is voltage on power supply terminal VBUS is high level, and the testing result of processor is voltage on detection terminal ID, and not dragged down be the second predetermined voltage; Then control second switch by processor and be in conducting state;
If the testing result of power subsystem 425 is the voltage on voltage terminal VBUS is high level, and the testing result of processor 421 is voltage on detection terminal ID is not dragged down as earthed voltage, then illustrate that the external connector of current connection is by the MHL connector 440 of external power source.Electronic equipment 420 controls second switch S2 by processor 421 and is in conducting state, and the ID detection terminal in processor 421 and USB interface 424 is electrical connected.Meanwhile, electronic equipment 420 can also control power subsystem 425 by processor 421 and enable charged state.Electronic equipment 420 also needs to be in the second conducting state by MHL chip 422 control USB diverter switch
It should be noted that, if the testing result of processor 421 is voltage on detection terminal ID, to be dragged down be the second predetermined voltage, also i.e. earthed voltage, then represent that aerial lug is OTG connector, subsequent treatment mode is identical with a upper embodiment, repeats no more.
For MHL connector 440, power owing to there is external power supply, then the voltage on power supply terminal VBUS is high level, so the 3rd switch S 3 will be in the second switching state, the detection terminal ID in USB interface 442 is connected with encryption chip 443.
Step 804, obtains identification signal by processor from detection terminal ID;
Electronic equipment 420 obtains identification signal by processor 421 from detection terminal ID.This identification signal is the enciphered message sent by the encryption chip 443 in MHL connector 440.
Step 805, if processor is predetermined enciphered message from the identification signal that detection terminal ID gets, is then judged to be that the connector of the current connection of USB interface is predetermined MHL connector;
If processor 421 is predetermined enciphered message from the identification signal that detection terminal ID gets, then electronic equipment 420 is judged to be that the connector of the current connection of USB interface is predetermined MHL connector.
Step 806, allows with MHL mode output sound vision signal.
Judged result due to electronic equipment 420 is the connector of the current connection of USB interface is predetermined MHL connector, so electronic equipment 420 allows with MHL mode output sound vision signal, make playback equipment 460 can play the audio-video signal of electronic equipment 420 output.
Step 807, if processor is not predetermined enciphered message from the identification signal that detection terminal ID gets, or processor does not get identification signal from detection terminal ID, be then judged to be that the connector of the current connection of USB interface is not predetermined MHL connector;
If processor 421 is not predetermined enciphered message from the identification signal that detection terminal ID gets, or processor does not get the identification signal of expectation from detection terminal ID, then electronic equipment 420 is judged to be that the connector of the current connection of USB interface is not predetermined MHL connector.
Step 808, forbids with MHL mode output sound vision signal.
Judged result due to electronic equipment 420 is the connector of the current connection of USB interface is not predetermined MHL connector, so electronic equipment 420 is forbidden with MHL mode output sound vision signal.
In sum, the connector detection method that the embodiment of the present invention provides, the identification signal on detection terminal ID is obtained by the on off state controlling second switch, and then whether be predetermined MHL connector according to the signal obtained if detecting connected MHL connector, to select allow or forbid with MHL mode output sound vision signal, solve the job insecurity that electronic equipment at will uses MHL connector to occur, the ropy problem of audio-video signal exported, reach the electronic equipment only just output sound vision signal when the MHL connector current connection being detected is predetermined MHL connector, to ensure the effect of good signal transmission quality.
Embodiment seven
Please refer to Figure 10, it illustrates the method flow diagram of the connector detection method that the embodiment of the present invention seven provides.As the more preferred embodiment provided based on embodiment four, the present embodiment is applied in the electronic equipment that embodiment one or embodiment three provide with this connector detection method, and the embodiment two that this electronic equipment connects or the predetermined MHL connector that embodiment three provides, and this predetermined MHL connector is illustrated by the MHL connector of power electronic equipment.This connector detection method, comprising:
Whether step 1001 is the first predetermined voltage by the voltage on the detection terminal ID in MHL chip detection USB interface;
In conjunction with Figure 11, when the USB interface 424 of electronic equipment 420 has aerial lug to access time, whether the voltage that electronic equipment 420 is detected by MHL chip 422 on the detection terminal ID in USB interface 424 is the first predetermined voltage, first predetermined voltage is the earthed voltage of detection terminal ID by earth resistance R1 ground connection, and the resistance of this earth resistance R1 is generally 1K.
Step 1002, if the testing result of MHL chip is voltage on detection terminal ID in USB interface is the first predetermined voltage, is then in cut-off state by MHL chip controls first switch;
If the testing result of MHL chip 422 is the voltage on the detection terminal ID in USB interface 424 is the first predetermined voltage, then show that the connector of current connection is MHL connector, electronic equipment 420 controls the first switch S 1 by MHL chip 422 and is in conducting state, and processor 421 is connected with the detection terminal ID in USB interface 424.
Step 1003, is in the second conducting state by MHL chip controls USB diverter switch;
Electronic equipment 420 is also in the second conducting state by MHL chip 422 control USB diverter switch.USB interface 424 is used as MHL interface.
Step 1004, sends interrupt signal by MHL chip to processor;
Electronic equipment 420 also sends interrupt signal by MHL chip 422 to processor 421.Meanwhile, owing to can be previously provided with 1 register in MHL chip, for storaging state information, this state information can be divided into: current connection be MHL connector state; With, current connection be not MHL connector state.So electronic equipment 420 can also be by self state information of MHL chip amendment: current connection be MHL connector state.
Step 1005, after processor receives interrupt signal, detects the state information of MHL chip by processor;
After processor 421 receives interrupt signal, electronic equipment 420 detects the state information of MHL chip by processor 421.
Step 1006, if the connector that the state information that the testing result of processor is MHL chip is current connection is MHL connector, then controls second switch by processor and is in conducting state;
If the connector that the state information that the testing result of processor 421 is MHL chip is current connection is MHL connector, then electronic equipment 420 controls second switch S2 by processor 421 and is in conducting state;
Step 1007, controls power subsystem by processor and exports high level to power supply terminal VBUS;
Electronic equipment 420 also controls power subsystem 425 by processor 421 and exports high level, to power to MHL connector 440 to power supply terminal VBUS.MHL connector 440 is after power supply terminal VBUS becomes high level, and the 3rd switch S 3 can become the second switching state from the first initial switching state, and the detection terminal ID in USB interface 442 is connected with encryption chip 443.
Step 1008, obtains identification signal by processor from detection terminal ID;
Electronic equipment 420 obtains identification signal by processor 421 from detection terminal ID.This identification signal is the enciphered message sent by the encryption chip 443 in MHL connector 440.
Step 1009, if processor is predetermined enciphered message from the identification signal that detection terminal ID gets, is then judged to be that the connector of the current connection of USB interface is predetermined MHL connector;
If processor 421 is predetermined enciphered message from the identification signal that detection terminal ID gets, then electronic equipment 420 is judged to be that the connector of the current connection of USB interface is predetermined MHL connector.
Step 1000, allows with MHL mode output sound vision signal.
Judged result due to electronic equipment 420 is the connector of the current connection of USB interface is predetermined MHL connector, so electronic equipment 420 allows with MHL mode output sound vision signal, make playback equipment 460 can play the audio-video signal of electronic equipment 420 output.
Step 1011, if processor is not predetermined enciphered message from the identification signal that detection terminal ID gets, or processor does not get identification signal from detection terminal ID, be then judged to be that the connector of the current connection of USB interface is not predetermined MHL connector;
If it is not predetermined enciphered message that processor 421 gets identification signal from detection terminal ID, or, processor 421 does not get identification signal from detection terminal ID, then electronic equipment 420 is judged to be that the connector of the current connection of USB interface is not predetermined MHL connector.
Step 1012, forbids with MHL mode output sound vision signal.
Judged result due to electronic equipment 420 is the connector of the current connection of USB interface is not predetermined MHL connector, so electronic equipment 420 is forbidden with MHL mode output sound vision signal.
In sum, the connector detection method that the embodiment of the present invention provides, the identification signal on detection terminal ID is obtained by the on off state controlling second switch, and then whether be predetermined MHL connector according to the identification signal obtained if detecting connected MHL connector, to select allow or forbid with MHL mode output sound vision signal, solve the job insecurity that electronic equipment at will uses MHL connector to occur, the ropy problem of audio-video signal exported, reach the electronic equipment only just output sound vision signal when the MHL connector current connection being detected is predetermined MHL connector, to ensure the effect of good signal transmission quality.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an electronic equipment, comprise processor, mobile terminal high-definition audio and video standard interface MHL chip, general-purpose serial bus USB diverter switch, USB interface and power subsystem, it is characterized in that, described equipment, also comprises:
By the first switch of described MHL chip controls and the second switch that controlled by described processor;
One end and the described processor of described first switch are electrical connected, detection terminal ID in the other end of described first switch and described USB interface is electrical connected, described first switch is used for when described USB interface is connected with the miscellaneous equipment of non-MHL connector, makes described processor get identification signal on described detection terminal ID;
One end and the described processor of described second switch are electrical connected, detection terminal ID in the other end of described second switch and described USB interface is electrical connected, described second switch is used for when described USB interface is connected with MHL connector, described processor is got, and whether described detection terminal ID be the identification signal of predetermined MHL connector for characterizing, so that described processor is selected allow or forbid with MHL mode output sound vision signal according to described identification signal;
Wherein, be the described identification signal of predetermined MHL connector be the predetermined enciphered message exported by the encryption chip in described predetermined MHL connector for characterizing.
2. electronic equipment according to claim 1, is characterized in that:
Described processor and described MHL chip are electrical connected, described processor is also electrical connected respectively by being in the first data terminal D+ in the described USB diverter switch of the first conducting state and described USB interface and the second data terminal D-, and described processor is also electrical connected with described power subsystem;
The control end of described MHL chip and described USB diverter switch is electrical connected, and described MHL chip is also electrical connected respectively by being in the first data terminal D+ in the described USB diverter switch of the second conducting state and described USB interface and the second data terminal D-;
Power supply terminal VBUS in described power subsystem and described USB interface is electrical connected.
3. a MHL connector, comprise mobile terminal high-definition audio and video standard interface MHL chip and general-purpose serial bus USB interface, it is characterized in that, described connector, also comprises:
3rd switch, earth resistance and encryption chip;
Power supply terminal VBUS in the control end of described 3rd switch and described USB interface is electrical connected, detection terminal ID in one end of described 3rd switch and described USB interface is electrical connected, the other end of described 3rd switch when being in the first switching state and one end of described earth resistance be electrical connected; The other end of described 3rd switch when being in the second switching state and described encryption chip be electrical connected;
Power supply terminal VBUS in described encryption chip and described USB interface is electrical connected, described encryption chip is used for when described USB interface is connected with electronic equipment, export for characterizing the identification signal that described connector is predetermined MHL connector, so that the processor in described electronic equipment is selected allow or forbid with MHL mode output sound vision signal according to described identification signal;
The other end ground connection of described earth resistance.
4. MHL connector according to claim 3, is characterized in that, described connector also comprises pull-up resistor, and described encryption chip is also electrical connected by the power supply terminal VBUS in described pull-up resistor and described USB interface.
5. the MHL connector according to claim 3 or 4, is characterized in that, when the power supply terminal VBUS in described USB interface is low level, described 3rd switch is in the first switching state; When the power supply terminal VBUS in described USB interface is high level, described 3rd switch is in the second switching state.
6. a MHL system, is characterized in that, described system comprises:
Electronic equipment and the MHL connector be electrical connected with described electronic equipment;
Described electronic equipment is electronic equipment as claimed in claim 1 or 2;
Described MHL connector be as arbitrary in claim 3 to 5 as described in MHL connector.
7. a connector detection method, in electronic equipment according to claim 1, is characterized in that, described method comprises:
Obtain the identification signal on described detection terminal ID by the on off state controlling described first switch and/or second switch, judge according to the described identification signal got whether the connector of the current connection of described USB interface is predetermined mobile terminal high-definition audio and video standard interface MHL connector;
If judged result is the connector of the current connection of described USB interface is predetermined MHL connector, then allow with MHL mode outputting video signal;
If judged result is the connector of the current connection of described USB interface is not predetermined MHL connector, then forbid with MHL mode outputting video signal;
Wherein, in the described identification signal got, be the identification signal of predetermined MHL connector be the predetermined enciphered message exported by the encryption chip in predetermined MHL connector for characterizing.
8. method according to claim 7, it is characterized in that, the described on off state by controlling described first switch and/or second switch obtains the identification signal on described detection terminal ID, whether the connector judging the current connection of described USB interface according to the described identification signal got is predetermined mobile terminal high-definition audio and video standard interface MHL connector, comprising:
Whether be the first predetermined voltage by the voltage on the detection terminal ID in USB interface described in described MHL chip detection;
If the testing result of described MHL chip is the voltage on the detection terminal ID in described USB interface is the first predetermined voltage, be then in cut-off state by the first switch described in described MHL chip controls; The second conducting state is in by USB diverter switch described in described MHL chip controls; Interrupt signal is sent to described processor by described MHL chip;
After described processor receives described interrupt signal, detected the state information of described MHL chip by described processor;
If the connector that the state information that the testing result of described processor is described MHL chip is current connection is MHL connector, then controls described second switch by described processor and be in conducting state; Control described power subsystem by described processor and export high level to described power supply terminal VBUS;
Identification signal is obtained from described detection terminal ID by described processor;
If described processor is predetermined enciphered message from the identification signal that described detection terminal ID gets, be then judged to be that the connector of the current connection of described USB interface is predetermined MHL connector;
If described processor is not predetermined enciphered message from the identification signal that described detection terminal ID gets, or described processor does not get identification signal from described detection terminal ID, be then judged to be that the connector of the current connection of described USB interface is not predetermined MHL connector.
9. method according to claim 7, it is characterized in that, the described on off state by controlling described first switch and/or second switch obtains the identification signal on described detection terminal ID, whether the connector judging the current connection of described USB interface according to the described identification signal got is predetermined mobile terminal high-definition audio and video standard interface MHL connector, comprising:
Whether the voltage detected on power supply terminal VBUS by described power subsystem is high level;
Whether the voltage detected on described detection terminal ID by described processor is dragged down is the second predetermined voltage;
If the testing result of described power subsystem is the voltage on described power supply terminal VBUS is high level, and the testing result of described processor is voltage on described detection terminal ID, and not dragged down be the second predetermined voltage; Then control described second switch by described processor and be in conducting state;
Identification signal is obtained from described detection terminal ID by described processor;
If described processor is predetermined enciphered message from the identification signal that described detection terminal ID gets, be then judged to be that the connector of the current connection of described USB interface is predetermined MHL connector;
If described processor is not predetermined enciphered message from the identification signal that described detection terminal ID gets, or described processor does not get identification signal from described detection terminal ID, be then judged to be that the connector of the current connection of described USB interface is not predetermined MHL connector.
10. method according to claim 7, it is characterized in that, the described on off state by controlling described first switch and/or second switch obtains the identification signal on described detection terminal ID, whether the connector judging the current connection of described USB interface according to the described identification signal got is predetermined mobile terminal high-definition audio and video standard interface MHL connector, comprising:
Whether be the second predetermined voltage by the voltage on the detection terminal ID in USB interface described in described MHL chip detection;
If the testing result of described MHL chip is the voltage on the detection terminal ID in described USB interface is the second predetermined voltage, be then in the first conducting state by USB diverter switch described in described MHL chip controls; Be in conducting state by the first switch described in described MHL chip controls, make described processor get described second predetermined voltage as identification signal from described detection terminal ID; Control described power subsystem by described processor and export high level to described power supply terminal VBUS; And be judged to be that the connector of the current connection of described USB interface is not predetermined MHL connector.
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| CN104090855B (en) * | 2014-06-09 | 2017-08-04 | 青岛海信移动通信技术股份有限公司 | The USB mode of USB interface and the compatibility method and device of MHL patterns |
| CN104090860B (en) * | 2014-07-04 | 2017-06-16 | 苏州佳世达电通有限公司 | A kind of display device and its operating method |
| CN105791732A (en) * | 2014-12-23 | 2016-07-20 | 乐视移动智能信息技术（北京）有限公司 | Processing method and apparatus for MHL (Mobile High-Definition Link) driver |
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| CN104615569A (en) * | 2014-12-31 | 2015-05-13 | 小米科技有限责任公司 | Electronic equipment and data transmission system |
| CN105681781B (en) * | 2015-04-17 | 2018-01-12 | 深圳Tcl数字技术有限公司 | MHL mode detection methods and device |
| CN105718016A (en) * | 2015-06-04 | 2016-06-29 | 乐视移动智能信息技术（北京）有限公司 | Power supply method and device of adapter |
| CN105048199B (en) * | 2015-06-17 | 2018-03-30 | 广东欧珀移动通信有限公司 | A kind of detecting system and its detection method of connector break-make |
| CN105975414A (en) * | 2015-10-26 | 2016-09-28 | 乐视移动智能信息技术（北京）有限公司 | Method and device for controlling mobile terminal |
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