CN102281482A - Function extension method and device thereof for earphone jack of smart phone - Google Patents
Function extension method and device thereof for earphone jack of smart phone Download PDFInfo
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- CN102281482A CN102281482A CN201110192849XA CN201110192849A CN102281482A CN 102281482 A CN102281482 A CN 102281482A CN 201110192849X A CN201110192849X A CN 201110192849XA CN 201110192849 A CN201110192849 A CN 201110192849A CN 102281482 A CN102281482 A CN 102281482A
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Abstract
The invention discloses a function extension method and a device thereof for an earphone jack of a smart phone. The function extension method comprises the following steps that: step 1, after detecting that a peripheral unit is plugged into the earphone jack of the smart phone via an earphone plug, the smart phone connects a clock signal SCK (Serial Clock) of an I2C(Inter-Integrated Circuit) controller to a left channel pin of the earphone jack of the smart phone, and connects a data signal SDL(Simple DirectMedia Layer) of the I2C controller to a right channel pin of the earphone jack of the smart phone; step 2, the smart phone sends a query signal, if the smart phone receives an acknowledgement signal within a predetermined period of time, the smart phone executes I2C communication with the peripheral unit, otherwise, the smart phone connects a left channel analog signal to the left channel pin of the earphone jack of the smart phone, and connects a right channel analog signal to the right channel pin of the earphone jack of the smart phone. With the method and the device, the compatibility and the universality of the earphone jack are both enhanced, and production cost can be further reduced without modifying a physical structure of a standard jack.
Description
Technical field
The present invention relates to Mobile operating system, relate in particular to a kind of method for developing functions and device of smart mobile phone earphone jack.
Background technology
Carry out function expansion in the quick function expansion of portable set with support by receiver J-Horner because for a long time.What occur the earliest is exactly the line control machine of portable walkman, its principle be the earphone of standard take out mouthful and the basis of plug on increase by a circle contact and carry out extra data or electric current transmission, and, thereby realize that the receiver J-Horner and the plug of more correcting one's mistakes by physical structure carry out the transmission of control signal with the shared ground wire of audio frequency apparatus.The method of another kind of receiver J-Horner expansion is exactly by revising receiver J-Horner and plug, provide extra function on increase additional stitch in the next door of standard interface and joint is realized the output compatible basis of original earpiece audio, this application appears on the ipod equipment of early stage Apple.
More than the receiver J-Horner function expansion is all revised at the physical structure of receiver J-Horner, simultaneously the direction that transmits of data or signal all is unidirectional simple transmission and is the standard shortage versatility of manufacturer oneself.
Summary of the invention
At the above-mentioned problems in the prior art, the invention provides method and device that a kind of smart mobile phone earphone jack is carried out the function expansion.This method is under the prerequisite of the physical structure that does not change the standard earphone socket, in the circuit of smart mobile phone, increase the related circuit that input and signal switch, and operating system is carried out and a spot of modification is supported to carry out function expansion fast by the receiver J-Horner of mobile phone.
The invention provides a kind of method for developing functions of smart mobile phone earphone jack, comprising:
Step 1, after detecting ancillary equipment and inserting the smart mobile phone earphone jack by headset plug, smart mobile phone is with I
2The clock signal SCK of C controller is connected to the L channel pin of smart mobile phone earphone jack, with I
2The data-signal SDL of C controller is connected to the R channel pin of smart mobile phone earphone jack;
Step 2, smart mobile phone sends request signal, if receive answer signal in Preset Time, then smart mobile phone and ancillary equipment carry out I
2C communication, otherwise smart mobile phone is connected to the L channel pin of smart mobile phone earphone jack with the L channel analog signal, the R channel analog signal is connected to the R channel pin of smart mobile phone earphone jack.
In one example, smart mobile phone is a main equipment, and ancillary equipment is slave unit.
In one example, smart mobile phone is after receiving answer signal, and smart mobile phone carries out initialization to ancillary equipment.
The invention provides a kind of function expanding device of smart mobile phone earphone jack, comprise smart mobile phone and ancillary equipment;
Smart mobile phone has I/O control module, I
2C controller and earpiece audio output module;
Ancillary equipment has headset plug;
Smart mobile phone also has diverter switch;
The I/O control module is used for sending first control signal after smart mobile phone detects the headset plug insertion smart mobile phone earphone jack of ancillary equipment; Diverter switch is used for according to first control signal I
2The clock signal SCK of C controller and data-signal SDL are connected respectively to the L channel pin and the R channel pin of smart mobile phone earphone jack;
Smart mobile phone also is used in diverter switch according to first control signal I
2After the clock signal SCK of C controller and data-signal SDL were connected respectively to the L channel pin and R channel pin of smart mobile phone earphone jack, equipment sent request signal to the periphery; Receive answer signal in Preset Time after, smart mobile phone and ancillary equipment carry out I
2C communication, otherwise the I/O control module is sent second control signal, handover module is connected to the L channel pin of smart mobile phone earphone jack according to second control signal with the L channel analog signal of earpiece audio output module, the R channel analog signal of earpiece audio output module is connected to the R channel pin of smart mobile phone earphone jack.
In one example, smart mobile phone is a main equipment, and ancillary equipment is slave unit.
In one example, smart mobile phone also is used for after receiving answer signal ancillary equipment being carried out initialization.
The present invention detects by the resistance to equipment on the basis of the receiver J-Horner of standard, determines the type of equipment, and the stitch attribute of dynamic-configuration receiver J-Horner realization function expansion, and digital device is adopted the I of standard
2The C bus is carried out both-way communication, makes that compatibility and versatility are strengthened, and the physical structure of not revising standard socket simultaneously can further reduce production costs.
Description of drawings
Come the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Fig. 1 is a receiver J-Horner function expansion hardware logic structure;
Fig. 2 is equipment access, identification and handoff procedure;
Fig. 3 is I
2C signal and receiver J-Horner corresponding relation.
Embodiment
A kind of smart mobile phone earphone jack of the present invention is carried out the method for function expansion, whether can correctly respond I by the equipment that inserts in the examination criteria receiver J-Horner
2The type of determining equipment is inquired about in replying of C bus, automatically switch the then definition of holding wire of receiver J-Horner is supported corresponding equipment, and is sent specific signal to mobile phone operating system, notifying operation system initialization and this equipment of operation, thus the function that realizes receiver J-Horner is expanded.
A kind of smart mobile phone earphone jack of present embodiment is carried out the method for function expansion, comprises the following aspects:
1) measured receiver J-Horner carries out the function expansion
In order to carry out the function expansion of receiver J-Horner, need to increase the corresponding input and the circuit of switching, its logic interfacing as shown in Figure 1, its structure comprises signal shift switch, I
2C bus control unit and the intrinsic equipment of other mobile phones self.I
2Signal controlling and transmission when the C bus control unit is used for carrying out mobile phone and device talk when the equipment that detects insertion is digital device.The effect of signal shift switch is the stitch definition of receiver J-Horner to be changed i.e. standard audio output and I
2Carrying out physics between the C bus switches.
The access of equipment, the process that identification and signal switch as shown in Figure 2, when equipment access receiver J-Horner, equipment is configured to I earlier with receiver J-Horner
2The C mode bus, and equipment sent corresponding signal, and waiting facilities is replied, if equipment is not made in certain time interval T (1s) and being replied, mobile phone circuit switches to the analogue audio frequency output mode with the diverter switch of earphone signal pin automatically, i.e. the left and right acoustic channels of earphone output is connected to the original audio output circuit part of mobile phone.The content of answer signal and request signal can have multiple realization, and wherein a kind of scheme is that main process equipment, is represented to reply by correspondingly sending 0x0f to main equipment after equipment receives this signal to the signal 0xf0 of a byte of slave unit transmission.If when the mobile phone end was received answer signal in certain time interval T (1s), then there was an I in the notifying operation system
2The C bus apparatus is linked into equipment, and operating system just can carry out communication with this outside equipment.In order to support this characteristic, on operating system, increase the module of a monitoring, be used to monitor the signal that this digital device inserts, be used for initialization and control this equipment, wherein, the process that initialization sets comprises that the initialization function performance phase equipment according to the definition of device drives sends initialized order and data, the control procedure then function of the definition of the driver by equipment is finished, and provides concrete feature operation by the interface that device drives and operating system offer user program.Simultaneously, all comprised owing to present mobile phone embedded OS and hardware I
2The support of C bus and operation, like this, user program just can be operated the particular device of this access by operating system, thereby has realized function expansion.
Carry out the support that the function expansion needs software and hardware two aspects by receiver J-Horner, wherein the support of hardware as mentioned above.The software aspect, operating system provides the informing function of digital device access to user program and digital device is operated, and comprises the operating system API function of read-write and inquiry.Corresponding external equipment manufacturer will provide the external device that meets above standard and provide the software of corresponding mobile phone end to realize specific function.
2) based on I
2The device type that C replys detects
By being I earlier with the pin configuration of the left and right acoustic channels of standard headphone plug
2The C bus, send response signal by mobile phone end (main frame) to the equipment that inserts, and etc. the equipment that is inserted into reply, if in the regular hour, do not receive the answer signal of equipment, so just current earphone interface is configured to audio frequency output, the person is not configured to digital interface.At I
2In the definition of C equipment, transfer of data must have response, and therefore the Equipment Inspection by prior agreement responds whether judgment device is I
2C equipment.For the audio output apparatus of this class of earphone, itself be the input mode of passive and high impedance, I
2Whether it is impossible that the response of C detects, can checkout equipment be digital external equipment just by this means.Wherein, I
2The corresponding relation of C bus and receiver J-Horner as shown in Figure 3, I
2The L channel pin of the corresponding receiver J-Horner of the clock signal SCK of C bus, the R channel pin of the corresponding socket of data-signal SDL, the grounding pin of receiver J-Horner is at I
2The same down ground state that keeps of C configuration.
3) adopt I
2The C bus is carried out the transfer of data of digital device
When detecting access device and be digital device, be I with the pin configurations of the left and right acoustic channels of standard earphone socket
2The clock and the digital signal line of C bus correspondence utilize I
2The C bus standard carries out the communication of mobile phone and external device.For the relation between the clear and definite equipment, in this implementation, the mobile phone end is configured to I all the time
2The C bus master, and external digital device is configured to I all the time
2The slave unit of C bus, simultaneously, in order to carry out the type detection of equipment, define the answer signal of one group of master-slave equipment, the realization of answer signal coding can have multiple mode, send request signal 0xf0 such as: main frame to the slave unit of address 0x01, and the slave unit of 0x01 is replied expression with 0x0f and is existed.The corresponding I in the device address here
2Type identifier in the control byte of C bus is generally 1101 (binary systems) such as eeprom memory.I
2Also have three bit slice bit selectings in the control byte of C bus protocol, this use of three depends on equipment supplier's the definition and the design of driver and equipment, is provided by equipment and decides in its sole discretion.
For equipment is further classified, utilize I
2Type identifier in the C bus address is distinguished, and a kind of scheme of classification is as shown in the table.
| The device address | Device type | Can use operation |
| 0x01 | Read-only | Read inquiry response |
| 0x02 | Only write | Write inquiry response |
| 0x03 | Read-write | Read, write, inquiry response |
| Other | Other | Manufacturer is self-defined |
Because receiver J-Horner for once connects an equipment, therefore, be that same definite address class is divided equipment by address setting, and define its operation of a sort equipment.And the process of transfer of data is pressed I fully
2The standard of C bus is carried out.I
2The transfer of data of C bus need be expanded the function of operating system, to support I
2The C bus operation, and to the I based on receiver J-Horner
2The mobile phone end software that the notification service that the operation of C bus provides relative operation system to call to insert and detect with equipment provides for external equipment manufacturer is controlled external equipment and is received the data of external equipment.
Embodiment
An existing mobile phone through said method realization receiver J-Horner expanded function, its operating system provides the I to the earphone expansion
2The notification service and the query function of the equipment access of the api function of the operation of C bus.Realized the external equipment of an alcohol detection now on the basis on this equipment.The software that erection unit manufacturer provides on mobile phone, with the receiver J-Horner of this equipment insertion mobile phone, mobile phone at first is configured to I with receiver J-Horner then
2The C mode bus, mobile phone sends the signal of inquiry to this equipment, and waiting facilities is corresponding, through T after a while (＜1s) after, equipment is made corresponding, the mobile phone end detects corresponding signal, and keeps I
2The receiver J-Horner configuration of C bus, notifying operation system earphone socket has an I
2The C bus apparatus is ready can be operated.The user starts the application program on the mobile phone, and application program is called by operating system, and the default address of inquiry manufacturer is the equipment of Addr, if software and equipment are complementary, and the data of this software waiting facilities end so.Simultaneously, this software also can pass through I to equipment
2The C bus sends configuration information, and the content of transmission depends on the definition of equipment vendors oneself.When the user blows to alcohol detection equipment, equipment detects alcohol content automatically, and when finishing when detecting, equipment passes through I
2The C bus sends to operating system, and operating system is passed to the device software of wait with these data, and by voice, screen etc. show alcohol content to software, finish the one-time detection process at the mobile phone end then.
The above only is a preferred implementation of the present invention, but protection range of the present invention is not limited thereto.Any those skilled in the art all can carry out suitable change or variation to it in technical scope disclosed by the invention, and this change or variation all should be encompassed within protection scope of the present invention.
Claims (6)
1. the method for developing functions of a smart mobile phone earphone jack is characterized in that, comprising:
Step 1, after detecting ancillary equipment and inserting the smart mobile phone earphone jack by headset plug, smart mobile phone is with I
2The clock signal SCK of C controller is connected to the L channel pin of smart mobile phone earphone jack, with I
2The data-signal SDL of C controller is connected to the R channel pin of smart mobile phone earphone jack;
Step 2, smart mobile phone sends request signal, if receive answer signal in Preset Time, then smart mobile phone and ancillary equipment carry out I
2C communication, otherwise smart mobile phone is connected to the L channel pin of smart mobile phone earphone jack with the L channel analog signal, the R channel analog signal is connected to the R channel pin of smart mobile phone earphone jack.
2. method for developing functions as claimed in claim 1 is characterized in that, smart mobile phone is a main equipment, and ancillary equipment is slave unit.
3. method for developing functions as claimed in claim 1 or 2 is characterized in that, smart mobile phone is after receiving answer signal, and smart mobile phone carries out initialization to ancillary equipment.
4. the function expanding device of a smart mobile phone earphone jack is characterized in that, comprises smart mobile phone and ancillary equipment;
Smart mobile phone has I/O control module, I
2C controller and earpiece audio output module;
Ancillary equipment has headset plug;
Smart mobile phone also has diverter switch;
The I/O control module is used for sending first control signal after smart mobile phone detects the headset plug insertion smart mobile phone earphone jack of ancillary equipment; Diverter switch is used for according to first control signal I
2The clock signal SCK of C controller and data-signal SDL are connected respectively to the L channel pin and the R channel pin of smart mobile phone earphone jack;
Smart mobile phone also is used in diverter switch according to first control signal I
2After the clock signal SCK of C controller and data-signal SDL were connected respectively to the L channel pin and R channel pin of smart mobile phone earphone jack, equipment sent request signal to the periphery; Receive answer signal in Preset Time after, smart mobile phone and ancillary equipment carry out I
2C communication, otherwise the I/O control module is sent second control signal, handover module is connected to the L channel pin of smart mobile phone earphone jack according to second control signal with the L channel analog signal of earpiece audio output module, the R channel analog signal of earpiece audio output module is connected to the R channel pin of smart mobile phone earphone jack.
5. function expanding device as claimed in claim 1 is characterized in that, smart mobile phone is a main equipment, and ancillary equipment is slave unit.
6. as claim 4 or 5 described function expanding devices, it is characterized in that smart mobile phone also is used for after receiving answer signal ancillary equipment being carried out initialization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110192849XA CN102281482A (en) | 2011-07-11 | 2011-07-11 | Function extension method and device thereof for earphone jack of smart phone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110192849XA CN102281482A (en) | 2011-07-11 | 2011-07-11 | Function extension method and device thereof for earphone jack of smart phone |
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| CN201110192849XA Pending CN102281482A (en) | 2011-07-11 | 2011-07-11 | Function extension method and device thereof for earphone jack of smart phone |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102724367A (en) * | 2012-06-27 | 2012-10-10 | 喻应东 | Mobile phone extension system, signal transfer equipment and mobile phone |
| CN103051736A (en) * | 2012-09-25 | 2013-04-17 | 深圳芯邦科技股份有限公司 | Processing method of control information and I2C (Inter-Integrated Circuit) bus equipment |
| CN103473206A (en) * | 2013-09-17 | 2013-12-25 | 广东威创视讯科技股份有限公司 | Data transmission method and I2C (Inter-Integrated Circuit) interface extender |
| CN104316919A (en) * | 2014-10-20 | 2015-01-28 | 贝壳网际（北京）安全技术有限公司 | System and method for warning road condition, mobile terminal and radar detection apparatus |
| WO2015043188A1 (en) * | 2013-09-24 | 2015-04-02 | 小米科技有限责任公司 | Connection component for earphone plug, earphone jack and terminal |
| CN105528317A (en) * | 2014-09-30 | 2016-04-27 | 展讯通信（上海）有限公司 | Mobile terminal |
| US9467766B2 (en) | 2013-09-24 | 2016-10-11 | Xiaomi Inc. | Connection member for connecting headset plug, headset jack and electronic device |
| CN106648857A (en) * | 2016-11-29 | 2017-05-10 | 维沃移动通信有限公司 | Method for starting OTG function of mobile terminal and mobile terminal |
| CN104459376B (en) * | 2014-11-18 | 2018-03-23 | 青岛海信移动通信技术股份有限公司 | A kind of interface circuit and peripherals detecting method, outer sensor based on the circuit |
| CN109874097A (en) * | 2017-12-05 | 2019-06-11 | 炬芯（珠海）科技有限公司 | Active noise reduction earphone and its test macro |
| CN110096468A (en) * | 2019-05-08 | 2019-08-06 | 西北大学 | It is a kind of based on FPGA architecture mobile module and its with the connection method of mobile phone |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102724367B (en) * | 2012-06-27 | 2014-09-10 | 喻应东 | Mobile phone extension system, signal transfer equipment and mobile phone |
| CN102724367A (en) * | 2012-06-27 | 2012-10-10 | 喻应东 | Mobile phone extension system, signal transfer equipment and mobile phone |
| CN103051736A (en) * | 2012-09-25 | 2013-04-17 | 深圳芯邦科技股份有限公司 | Processing method of control information and I2C (Inter-Integrated Circuit) bus equipment |
| CN103051736B (en) * | 2012-09-25 | 2015-08-26 | 深圳芯邦科技股份有限公司 | A kind of processing method of control information and I2C bus apparatus |
| CN103473206B (en) * | 2013-09-17 | 2016-08-17 | 广东威创视讯科技股份有限公司 | A kind of data transmission method and I2C Interface Extender |
| CN103473206A (en) * | 2013-09-17 | 2013-12-25 | 广东威创视讯科技股份有限公司 | Data transmission method and I2C (Inter-Integrated Circuit) interface extender |
| WO2015043188A1 (en) * | 2013-09-24 | 2015-04-02 | 小米科技有限责任公司 | Connection component for earphone plug, earphone jack and terminal |
| US9467766B2 (en) | 2013-09-24 | 2016-10-11 | Xiaomi Inc. | Connection member for connecting headset plug, headset jack and electronic device |
| CN105528317B (en) * | 2014-09-30 | 2018-07-27 | 展讯通信（上海）有限公司 | Mobile terminal |
| CN105528317A (en) * | 2014-09-30 | 2016-04-27 | 展讯通信（上海）有限公司 | Mobile terminal |
| CN104316919A (en) * | 2014-10-20 | 2015-01-28 | 贝壳网际（北京）安全技术有限公司 | System and method for warning road condition, mobile terminal and radar detection apparatus |
| CN104459376B (en) * | 2014-11-18 | 2018-03-23 | 青岛海信移动通信技术股份有限公司 | A kind of interface circuit and peripherals detecting method, outer sensor based on the circuit |
| CN106648857A (en) * | 2016-11-29 | 2017-05-10 | 维沃移动通信有限公司 | Method for starting OTG function of mobile terminal and mobile terminal |
| CN106648857B (en) * | 2016-11-29 | 2019-11-01 | 维沃移动通信有限公司 | A kind of open method and mobile terminal of the OTG function of mobile terminal |
| CN109874097A (en) * | 2017-12-05 | 2019-06-11 | 炬芯（珠海）科技有限公司 | Active noise reduction earphone and its test macro |
| CN109874097B (en) * | 2017-12-05 | 2020-10-30 | 炬芯科技股份有限公司 | Active noise reduction earphone and test system thereof |
| CN110096468A (en) * | 2019-05-08 | 2019-08-06 | 西北大学 | It is a kind of based on FPGA architecture mobile module and its with the connection method of mobile phone |
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Application publication date: 20111214 |