CN104066028A - Communication method based on headset jack and terminal device - Google Patents
Communication method based on headset jack and terminal device Download PDFInfo
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- CN104066028A CN104066028A CN201410275639.0A CN201410275639A CN104066028A CN 104066028 A CN104066028 A CN 104066028A CN 201410275639 A CN201410275639 A CN 201410275639A CN 104066028 A CN104066028 A CN 104066028A
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Abstract
The invention discloses a communication method based on a headset jack and a terminal device. The communication method includes the steps that when it is detected that an external device is inserted into the headset jack, whether the external device is a USB device is judged; if the answer is yes, a power source module is used for carrying out current exchange on the USB device through a pin of a microphone in the headset jack, and a USB communication module is used for communicating with the USB device through an audio pin in the headset jack; if the answer is no, an audio processing module is used for audio data transmission with the external device through the audio pin. Accordingly, the headset jack integrates an audio interface function and a USB interface function, can take the place of a USB interface, reduces the number of interfaces, and lowers cost.
Description
Technical field
The present invention relates to communication technical field, especially relate to a kind of communication means and terminal equipment based on earphone jack.
Background technology
Existing terminal equipment all has earphone jack and USB (Universal Serial Bus, USB) interface conventionally.Wherein, earphone jack is as audio interface, can peripheral earphone, the external equipment such as audio frequency apparatus, carry out the transmission of voice data; USB interface can external support usb protocol USB device, communicate with USB device, comprise and carry out transfer of data and exchanging electrical current, exchanging electrical current refers to that terminal equipment supplying power for outside or external equipment charge to terminal equipment.
Because earphone jack in prior art and USB interface can not share, if terminal equipment need to possess the function of the two, two kinds of interfaces just must be set simultaneously, improve cost of manufacture.Along with people are to portable demand, terminal equipment is miniaturization more and more, in the time that interface is more, can increase design difficulty, further improves cost of manufacture.Therefore, how the function of earphone jack and USB interface is united two into one, reduce costs, become urgent problem.
Summary of the invention
Main purpose of the present invention is to provide a kind of communication means and terminal equipment based on earphone jack, is intended to make earphone jack to have audio interface and two kinds of functions of USB interface concurrently, utilizes earphone jack to substitute USB interface, reduces interface quantity, reduces costs.
To achieve these objectives, the present invention proposes a kind of communication means based on earphone jack, comprises step:
When external equipment plugged earphone jack detected, judge whether described external equipment is USB device;
If, utilize power module, by the transmitter pin in described earphone jack, described USB device is carried out to exchanging electrical current, and utilize usb communication module to communicate by the audio frequency pin in described earphone jack and described USB device, described exchanging electrical current refers to that electric power source pair of module USB device is powered or USB device is charged to power module;
If not, utilize audio processing modules to carry out the transmission of voice data by described audio frequency pin and described external equipment.
Preferably, describedly judge whether external equipment is that USB device comprises:
Utilize described power module by a divider resistance to the transmitter pin output level in described earphone jack;
Detect point voltage level between transmitter pin and the grounding pin in described earphone jack, judge according to the size of described point of voltage level whether described external equipment is USB device.
Preferably, before the described step of utilizing audio processing modules carries out voice data transmission by described audio frequency pin and described external equipment, also comprise:
Be connected to described audio processing modules by giving tacit consent to described usb communication module the audio frequency pin switching being connected.
Preferably, describedly will give tacit consent to when the audio frequency pin that is connected switches the step that is connected to described audio processing modules and also comprise with described usb communication module:
Be connected to described audio processing modules by giving tacit consent to described power module the transmitter pin switching being connected.
Preferably, described method also comprises: detect that non-USB device extracts after described earphone jack, recover described audio frequency pin and be connected with the acquiescence of described usb communication module.
The present invention proposes a kind of terminal equipment simultaneously, and it has an earphone jack, comprises processing module, power module, audio processing modules and usb communication module, wherein:
Processing module, for detection of when the external equipment plugged earphone jack, judges whether described external equipment is USB device;
Power module, in the time that described external equipment is USB device, carries out exchanging electrical current by the transmitter pin in described earphone jack to described USB device;
Usb communication module, in the time that described external equipment is USB device, communicates by the audio frequency pin in described earphone jack and described USB device;
Audio processing modules, in the time that described external equipment is not USB device, carries out the transmission of voice data by described audio frequency pin and described external equipment.
Preferably, described power module is used for: the transmitter pin output level by a divider resistance to described earphone jack; Described processing module is used for: detect point voltage level between the transmitter pin of described earphone jack and grounding pin, judge according to the size of described point of voltage level whether described external equipment is USB device.
Preferably, also comprise a switch module, described processing module is used for: in the time judging that described external equipment is not USB device, send the first control signal to described switch module; Described switch module is used for: according to described the first control signal, be connected to described audio processing modules by giving tacit consent to described usb communication module the audio frequency pin switching being connected.
Preferably, described switch module also for: according to described the first control signal, switch and be connected to described audio processing modules giving tacit consent to described power module the transmitter pin that is connected.
Preferably, described processing module is used for: detect that non-USB device extracts after described earphone jack, send the second control signal to described switch module; Described switch module is used for: according to described the second control signal, recover described audio frequency pin and be connected with the acquiescence of described usb communication module.
A kind of communication means based on earphone jack provided by the present invention, by detecting the type of external equipment of plugged earphone jack, in the time that external equipment is USB device, utilize usb communication module to communicate by earphone jack and external equipment, in the time that external equipment is earphone or audio frequency apparatus, utilize audio processing modules and external equipment to carry out audio data transmission, make earphone jack have audio interface and two kinds of functions of USB interface concurrently, can substitute USB interface, reduce interface quantity, reduced cost.
Brief description of the drawings
Fig. 1 is the structured flowchart of terminal equipment the first embodiment of the present invention;
Fig. 2 is the flow chart that the present invention is based on communication means first embodiment of earphone jack;
Fig. 3 is the structured flowchart of terminal equipment the second embodiment of the present invention;
Fig. 4 is the flow chart that the present invention is based on communication means second embodiment of earphone jack;
Fig. 5 is the structured flowchart of terminal equipment of the present invention the 3rd embodiment;
Fig. 6 is the flow chart that the present invention is based on communication means the 3rd embodiment of earphone jack.
Realization, functional characteristics and the advantage of the object of the invention, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, terminal equipment the first embodiment of the present invention is proposed, described terminal equipment has an earphone jack, in earphone jack, be provided with audio frequency pin, transmitter pin (MIC) and grounding pin (GND), its sound intermediate frequency pin comprises L channel pin (L) and R channel pin (R).Terminal equipment comprises processing module, power module, audio processing modules and usb communication module.
Processing module: for detection of whether having inserted external equipment in earphone jack, if inserted external equipment, judge whether external equipment is USB device, and according to judged result, power module, audio processing modules and usb communication module are controlled.
In earphone jack, there is a detection pin (HS-DET), when after external equipment plugged earphone jack, detect pin and L channel pin short circuit, level between them reduces, in the time that processing module detects level and changes (reduction), recognize external equipment and inserted.In the time having external equipment to insert, processing module further detects point voltage level between transmitter pin and grounding pin, because different external equipments inserts time-division voltage level value difference, processing module judges according to the size of point voltage level whether the external equipment of current insertion is USB device.If judge it is not USB device, assert that external equipment is earphone or audio frequency apparatus (as audio amplifier).USB device refers to the equipment that can communicate by usb protocol, comprises mouse, keyboard, USB flash disk, apparatus such as computer.
Power module: in the time that external equipment is USB device, under the control of processing module, by the transmitter pin in earphone jack, USB device is carried out to exchanging electrical current, described exchanging electrical current refers to that electric power source pair of module external equipment is powered or external equipment charges to power module.
Usb communication module: in the time that external equipment is USB device, under the control of processing module, communicate by audio frequency pin and USB device in earphone jack.Now, earphone jack is equivalent to USB interface.
Audio processing modules: in the time that external equipment is not USB device, carry out the transmission of voice data by audio frequency pin and external equipment.
As shown in Figure 2, the flow process that aforementioned terminals equipment communicates based on earphone jack is as follows:
Step S101: processing module detects external equipment plugged earphone jack
Step S102: judge whether external equipment is USB device
Processing module is judged when the external equipment of current insertion is USB device, enters step S103; Judge while being not USB device, assert it is earphone or audio frequency apparatus, enter step S104.
Step S103: processing module control power module carries out exchanging electrical current by earphone jack to USB device, controls usb communication module and communicates by earphone jack and USB device
In the time that external equipment is USB device, processing module transmits control signal to power module, controls power module, by the transmitter pin of earphone jack, USB device is carried out to exchanging electrical current; Transmit control signal to usb communication module, control usb communication module and communicate with USB device by the audio frequency pin (L channel pin and R channel pin) of earphone jack simultaneously.Now, earphone jack is equivalent to USB interface.
Step S104: processing module control audio processing modules carries out the transmission of voice data by earphone jack and external equipment
When external equipment is not USB device, but when earphone or audio frequency apparatus, processing module transmits control signal to audio processing modules, controls the audio frequency pin of audio processing modules by earphone jack or/and transmitter pin carries out the transmission of voice data.
Thereby earphone jack both can be used as audio interface, can be used as again USB interface, expand the function of earphone jack, can omit the USB interface of terminal equipment, reduce cost.
Referring to Fig. 3; terminal equipment the second embodiment of the present invention is proposed; described terminal equipment comprises earphone jack 100, processing module (as CPU), switch module 200, usb communication module, power module, audio processing modules, overvoltage protection (OVP) circuit, analog-to-digital conversion (ADC) module and divider resistance 300; wherein earphone jack comprises grounding pin GND, audio frequency pin (L channel pin HPH-L and R channel pin HPH-R), transmitter pin MIC and detects pin HS-DET, and the concrete annexation of each unit module as shown in Figure 3.
The variation that processing module detects pin HS-DET level by detection has judged whether external equipment plugged earphone jack 100, after external equipment plugged earphone jack 100, detect pin HS-DET and L channel pin HPH-L short circuit, level between them can reduce, therefore in the time that processing module detects level and changes (reduction), recognized external equipment and inserted.
Power module is leaded up to divider resistance 300 and is connected with transmitter pin MIC with overvoltage crowbar; another road is directly connected and external equipment is carried out to exchanging electrical current with transmitter pin MIC by overvoltage crowbar, when overvoltage crowbar can prevent from by earphone jack 100, power module being charged, because voltage is excessive, it is caused to damage.In the time of external equipment plugged earphone jack 100, analog-to-digital conversion module can detect MIC pin level, if voltage is greater than 3.8V, is charger device, if voltage is below 0.8V, is the external equipment without power supply.Now because have certain resistance between transmitter pin MIC and grounding pin GND, power module is the level to transmitter pin output 2.7V by divider resistance 300 (preferably 2.2K), resistance between transmitter pin MIC and grounding pin GND carries out dividing potential drop with the divider resistance being connected in series 300, processing module is obtained point voltage level between two pins by analog-to-digital conversion module, analog-to-digital conversion module converts dividing potential drop level value to digital signal and sends processing module to, because different external equipments inserts time-division voltage level value difference, therefore processing module can judge whether the external equipment of current insertion is USB device according to the size of point voltage level.
Because the impedance between external equipment, transmitter pin MIC and grounding pin GND can be arranged, therefore can carry out following stepping to a point voltage level and carry out the identification of device type: in the time that dividing potential drop level numerical value is 1.0-0.3, be identified as three-section earphone; In the time that dividing potential drop level numerical value is 2.0.3-1.2, be identified as four-part form earphone; In the time that dividing potential drop level numerical value is 3.1.2-2.7, be identified as USB device.In addition, can also arrange to carry out by other identification of device type.
The L channel pin HPH-L of earphone jack 100 is connected with audio processing modules and usb communication module respectively by switch module 200 with R channel pin HPH-R.Under default situations, L channel pin HPH-L is connected with usb communication module with R channel pin HPH-R, now, earphone jack 100 is equivalent to USB interface, when the external equipment inserting is while being USB device, the L channel pin HPH-L of usb communication module by earphone jack 100 and R channel pin HPH-R and USB device communicate.
Judging the external equipment of current insertion when processing module is not USB device, but when earphone or audio frequency apparatus, send the first control signal to switch module 200, switch module 200 switches and is connected to audio processing modules giving tacit consent to the L channel pin HPH-L that is connected and R channel pin HPH-R with usb communication module according to the first control signal, and audio processing modules carries out the transmission of voice data by L channel pin HPH-L and R channel pin HPH-R and external equipment.In the time that processing module detects that the non-USB device such as earphone or audio frequency apparatus is extracted earphone jack, send the second control signal to switch module 200; Switch module 200, according to the second control signal, recovers L channel pin HPH-L and is connected with the acquiescence of usb communication module with R channel pin HPH-R.
As shown in Figure 4, the method that aforementioned terminals equipment communicates based on earphone jack comprises the following steps:
Step S201: processing module detects external equipment plugged earphone jack
Step S202: judge whether external equipment is USB device
If processing module judges that external equipment is USB device, enter step S203; If external equipment is not USB device, enter step S204.
Step S203: power module carries out exchanging electrical current by earphone jack to USB device, usb communication module communicates by earphone jack and USB device
Because the audio frequency pin acquiescence in earphone jack 100 is connected with usb communication module, now earphone jack 100 is equivalent to USB interface, therefore in the time that the external equipment inserting is USB device, usb communication module communicates by audio frequency pin and the USB device of earphone jack 100, simultaneously power module carries out exchanging electrical current by the transmitter pin of earphone jack 100 to USB device, as electric power source pair of module USB device is powered or USB device is charged to power module.
Step S204: processing module sends the first control signal to switch module
In the time judging the external equipment inserting as non-USB device, processing module sends the first control signal to switch module 200.
Step S205: switch module, according to the first control signal, is connected to audio processing modules by giving tacit consent to usb communication module the audio frequency pin switching being connected in earphone jack
Step S206: audio processing modules carries out the transmission of voice data by earphone jack and external equipment
Now earphone jack 100 is pure audio interface, and the audio frequency pin of audio processing modules by earphone jack 100 is or/and the external equipments such as transmitter pin MIC and earphone, audio frequency apparatus carry out the transmission of voice data.
In the time that processing module detects that the non-USB device such as earphone or audio frequency apparatus is extracted earphone jack 100, send the second control signal to switch module 200; Switch module 200, according to the second control signal, recovers audio frequency pin and is connected with the acquiescence of usb communication module.
In certain embodiments, audio frequency pin in earphone jack 100 also can be connected with audio processing modules acquiescence, in the time that external equipment is USB device, processing module control switch module 200 disconnects audio frequency pin and is connected with the acquiescence of audio processing modules, then audio frequency pin is connected to usb communication module.In the time that USB device is extracted earphone jack 100, then recover acquiescence connection.
Referring to Fig. 5, terminal equipment of the present invention the 3rd embodiment is proposed, the difference of the terminal equipment of described terminal equipment and the second embodiment is that switch module comprises the first switch element 210 and second switch unit 220, wherein the first switch element 210 is identical with the switch module in the second embodiment, and 220 of second switch unit are the elements that the present embodiment increases.
Power module is all connected with transmitter pin MIC by second switch unit 220 with audio processing modules.Under default situations, transmitter pin MIC is connected with power module, and now, earphone jack 100 is equivalent to USB interface, in the time that the external equipment inserting is USB device, power module carries out exchanging electrical current by the transmitter pin MIC of earphone jack 100 to USB device.Because audio processing modules has now disconnected and being connected with transmitter pin MIC, therefore can prevent that electric power source pair of module USB device from carrying out exchanging electrical current time, electric current pours in down a chimney to audio processing modules it is caused to damage.
Judging the external equipment of current insertion when processing module is not USB device, but when earphone or audio frequency apparatus, send the first control signal to second switch unit 220, second switch unit 220 is connected to audio processing modules according to the first control signal by giving tacit consent to power module the transmitter pin MIC switching being connected, and audio processing modules carries out the transmission of voice data by transmitter pin MIC and external equipment.In the time that processing module detects that the non-USB device such as earphone or audio frequency apparatus is extracted earphone jack 100, send the second control signal to the first switch element 210 and second switch unit 220; The first switch element 210, according to the second control signal, recovers L channel pin HPH-L and is connected with the acquiescence of usb communication module with R channel pin HPH-R; Second switch unit 220, according to the second control signal, recovers transmitter pin MIC and is connected with the acquiescence of power module.
As shown in Figure 6, the method that aforementioned terminals equipment communicates based on earphone jack comprises the following steps:
Step S301: processing module detects external equipment plugged earphone jack
Step S302: judge whether external equipment is USB device
If processing module judges that external equipment is USB device, enter step S303; If external equipment is not USB device, enter step S304.
Step S303: power module carries out exchanging electrical current by earphone jack to USB device, usb communication module communicates by earphone jack and USB device
Because the audio frequency pin acquiescence in earphone jack 100 is connected with usb communication module, now earphone jack 100 is equivalent to USB interface, therefore in the time that the external equipment inserting is USB device, usb communication module communicates by audio frequency pin and the USB device of earphone jack 100, simultaneously power module carries out exchanging electrical current by the transmitter pin of earphone jack 100 to USB device, as electric power source pair of module USB device is powered or USB device is charged to power module.Because audio processing modules has now disconnected and being connected with earphone jack 100, therefore can prevent that electric power source pair of module USB device from carrying out exchanging electrical current time, electric current pours in down a chimney to audio processing modules it is caused to damage.
Step S304: processing module sends the first control signal to switch module
In the time judging the external equipment inserting as non-USB device, processing module sends the first control signal to switch module, and switch module comprises the first switch element 210 and second switch unit 220.
Step S305: switch module is according to the first control signal, be connected to audio processing modules by giving tacit consent to usb communication module the audio frequency pin switching being connected in earphone jack, be connected to audio processing modules by giving tacit consent to power module the transmitter pin switching being connected in earphone jack
The first switch element 210 of switch module, according to the first control signal, is connected to audio processing modules by giving tacit consent to usb communication module the audio frequency pin switching being connected in earphone jack 100; Second switch unit 220, according to the first control signal, is connected to audio processing modules by giving tacit consent to power module the transmitter pin MIC switching being connected in earphone jack 100.
Step S306: audio processing modules carries out the transmission of voice data by earphone jack and external equipment
Now earphone jack 100 is pure audio interface, and the audio frequency pin of audio processing modules by earphone jack 100 is or/and the external equipments such as transmitter pin MIC and earphone, audio frequency apparatus carry out the transmission of voice data.
In the time that processing module detects that the non-USB device such as earphone or audio frequency apparatus is extracted earphone jack 100, send the second control signal to the first switch element 210 and second switch unit 220; The first switch element 210, according to the second control signal, recovers audio frequency pin and is connected with the acquiescence of usb communication module; Second switch unit 220, according to the second control signal, recovers transmitter pin MIC and is connected with the acquiescence of power module.
In certain embodiments, audio frequency pin in earphone jack 100 also can be connected with audio processing modules acquiescence with transmitter pin MIC, in the time that external equipment is USB device, processing module control the first switch element 210 disconnects audio frequency pin and is connected with the acquiescence of audio processing modules, then audio frequency pin is connected to usb communication module; Control second switch unit 220 disconnects transmitter pin MIC and is connected with the acquiescence of audio processing modules, then transmitter pin MIC is connected to power module.In the time that USB device is extracted earphone jack 100, then recover acquiescence connection.
With reference to the accompanying drawings of the preferred embodiments of the present invention, not thereby limit to interest field of the present invention above.Those skilled in the art do not depart from the scope and spirit of the present invention, and can have multiple flexible program to realize the present invention, such as can be used for another embodiment and obtain another embodiment as the feature of an embodiment.Allly using any amendment of doing within technical conceive of the present invention, be equal to and replace and improve, all should be within interest field of the present invention.
Claims (10)
1. the communication means based on earphone jack, is characterized in that, comprises step:
When external equipment plugged earphone jack detected, judge whether described external equipment is USB device;
If so, utilize power module, by the transmitter pin in described earphone jack, described USB device is carried out to exchanging electrical current, and utilize usb communication module to communicate by the audio frequency pin in described earphone jack and described USB device;
If not, utilize audio processing modules to carry out the transmission of voice data by described audio frequency pin and described external equipment.
2. the communication means based on earphone jack according to claim 1, is characterized in that, describedly judges whether external equipment is that USB device comprises:
Utilize described power module by a divider resistance to the transmitter pin output level in described earphone jack;
Detect point voltage level between transmitter pin and the grounding pin in described earphone jack, judge according to the size of described point of voltage level whether described external equipment is USB device.
3. the communication means based on earphone jack according to claim 1 and 2, is characterized in that, before the described step of utilizing audio processing modules carries out voice data transmission by described audio frequency pin and described external equipment, also comprises:
Be connected to described audio processing modules by giving tacit consent to described usb communication module the audio frequency pin switching being connected.
4. the communication means based on earphone jack according to claim 3, is characterized in that, describedly will give tacit consent to when the audio frequency pin that is connected switches the step that is connected to described audio processing modules and also comprise with described usb communication module:
Be connected to described audio processing modules by giving tacit consent to described power module the transmitter pin switching being connected.
5. the communication means based on earphone jack according to claim 3, is characterized in that, described method also comprises: detect that non-USB device extracts after described earphone jack, recover described audio frequency pin and be connected with the acquiescence of described usb communication module.
6. a terminal equipment, has an earphone jack, it is characterized in that, comprises processing module, power module, audio processing modules and usb communication module, wherein:
Processing module, for detection of when the external equipment plugged earphone jack, judges whether described external equipment is USB device;
Power module, in the time that described external equipment is USB device, carries out exchanging electrical current by the transmitter pin in described earphone jack to described USB device;
Usb communication module, in the time that described external equipment is USB device, communicates by the audio frequency pin in described earphone jack and described USB device;
Audio processing modules, in the time that described external equipment is not USB device, carries out the transmission of voice data by described audio frequency pin and described external equipment.
7. terminal equipment according to claim 6, is characterized in that, described power module is used for: the transmitter pin output level by a divider resistance to described earphone jack; Described processing module is used for: detect point voltage level between the transmitter pin of described earphone jack and grounding pin, judge according to the size of described point of voltage level whether described external equipment is USB device.
8. according to the terminal equipment described in claim 6 or 7, it is characterized in that, also comprise a switch module, described processing module is used for: in the time judging that described external equipment is not USB device, send the first control signal to described switch module; Described switch module is used for: according to described the first control signal, be connected to described audio processing modules by giving tacit consent to described usb communication module the audio frequency pin switching being connected.
9. terminal equipment according to claim 8, is characterized in that, described switch module also for: according to described the first control signal, switch and be connected to described audio processing modules giving tacit consent to described power module the transmitter pin that is connected.
10. terminal equipment according to claim 8, is characterized in that, described processing module is used for: detect that non-USB device extracts after described earphone jack, send the second control signal to described switch module; Described switch module is used for: according to described the second control signal, recover described audio frequency pin and be connected with the acquiescence of described usb communication module.
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| CN201410275639.0A CN104066028A (en) | 2014-06-19 | 2014-06-19 | Communication method based on headset jack and terminal device |
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| CN105611450B (en) * | 2016-01-29 | 2018-03-09 | 广东欧珀移动通信有限公司 | A kind of method, apparatus and mobile terminal for identifying self-shooting bar |
| CN105959854A (en) * | 2016-06-22 | 2016-09-21 | 惠州Tcl移动通信有限公司 | Method and system for realizing normal output of left sound and right sound based on headset |
| CN105959854B (en) * | 2016-06-22 | 2019-09-24 | 惠州Tcl移动通信有限公司 | A kind of method and system for realizing that left and right sound is normally exported based on earphone |
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