CN101184284A - Control method for judging insertion type of earphone by mobile phone - Google Patents

Abstract

The invention relates to a control method for judging the inserting kind of earphones using the mobile phones. The invention comprises the following steps: in the IDLE state of the mobile phone, the simulate switch of the mobile phone is connected with the GPIO end; when the earphone is inserted and detected, the simulate switch is connected with the MicBisa; the ADC is opened and sampling is operated; the sample value is judged and the following states are entered: the microphone of the line control earphone is connected with the normal earphone MIC and the orders ''OX02'' and ''TVOUT line'' are sent out; ''the normal stereo earphone'' and ''higher than 2 volts is line control earphone or the TVOUT line without being inserted the television''; if the detection result is ''getting the returning value'', the state ''the line control earphone is entered and the Mic has already been tripped off'' is entered; if the detected value is ''without getting the returning value'', the state ''the normal earphone without linearity'' is entered; if the detection result is ''getting the returning value OX81'', the state ''line control earphone'' is entered and if the detection result is ''getting no returning value'', the state ''TVOUT line without being inserting the television'' is entered.

Description

The control method of judging insertion type of earphone by mobile phone

Technical field

The present invention relates to a kind of control method of judging insertion type of earphone by mobile phone.

Background technology

The earphone socket of the mobile phone of many in the market band line control machines all adopts the USB mode, the socket mode that it adopts and plug insert the differentiation control method of type, be not easy to the user earphone of common pin (Φ 2.5 OR Φ 3.5) is directly applied on this type of mobile phone.

At present with the mobile phone of general earphone socket (Φ 2.5 OR Φ 3.5), can not realize differentiation again by the mode that this jack interface detects automatically or manually detects simultaneously, as mobile phone line control machine plug, common headphones plug, band MIC headset plug, TVOUT plug, mobile phone games controller plug etc. to multiple insertion type of plug.

Summary of the invention

The objective of the invention is to overcome above-mentioned weak point of the prior art, provide a kind of common headphones socket (Φ 2.5 OR Φ 3.5) of using as handset port, make the very strong interface of versatility (Φ 2.5OR Φ 3.5) differentiate the insertion type of plug with software or hardware mode, compatible strong, and then realization mobile phone and common headphones, band MIC earphone, mobile phone line control machine, TV, the function of the unidirectional or two-way communication of modules such as game console, it judges that the control method of insertion type of earphone can be applied to the control method of the judging insertion type of earphone by mobile phone in the multiple Related product design again.

Purpose of the present invention can reach by following measure:

The control method of this judging insertion type of earphone by mobile phone, its special character is, comprises the following step:

(1.1) under the IDLE of mobile phone state, do not insert earphone, the analog switch on the mobile phone is received GPIO end (step 101);

(1.2) detect the insertion earphone, analog switch is received MicBisa and is opened ADC sampling (step 102);

(1.3) judge sampled value, enter " the line control earphone microphone has connected or the earphone (0.5～1.2 volt) of normal tape MIC " (step 103), " IVOUT line (0.15～0.5 volt) " (step 104), " normal stereo earphone (0 volt) " (step 105), " being higher than 2 volts is line control earphone or the TVOUT line that do not have plug-in to look " (step 106) respectively;

(1.4) step 103 enters next step 107;

(1.5) send order OX02 (step 107);

(1.6) if the testing result of step 107 is " obtaining return value ", then enter " line control earphone, and Mic disconnects " (step 109);

(1.7), then enter " being common " (step 108) not with the earphone of linearity if the testing result of step 107 be " not waiting until return value ";

(1.8) step 106 enters next step (110);

(1.9) if the testing result of step 110 for obtaining return value OX81, is then directly gone into " being line control earphone " (step 111);

(1.10) if the testing result of step 110 is " not obtaining return value ", then enter " the TVOUT line that does not have plug-in to look " (step 112).

The present invention has following advantage compared to existing technology:

1, the common headphones socket that adopts the discrimination technology that can discern multiple insertion plug (Φ 2.5 OR Φ 3.5) type not only for the user brings great convenience, also is a kind of universal design as handset port.

2, this differentiation control method, promptly differentiating agreement has two kinds of hardware detection and software detection, also this method can be applied to the design of multiple Related product.

Description of drawings

Fig. 1 is the flow chart of the control method of judging insertion type of earphone by mobile phone of the present invention.

Fig. 2 is the earphone interface circuit schematic diagram of mobile phone of the present invention.

Embodiment

The present invention is further detailed in conjunction with the accompanying drawings below:

See also shown in Figure 1ly, the control method of this judging insertion type of earphone by mobile phone comprises the following step:

(1.1) under the IDLE of mobile phone state, do not insert earphone, the analog switch on the mobile phone is received GPIO end (step 101);

(1.2) detect the insertion earphone, analog switch is received MicBisa and is opened ADC sampling (step 102);

(1.3) judge sampled value, enter " the line control earphone microphone has connected or the earphone (0.5～1.2 volt) of normal tape MIC " (step 103), " IVOUT line (0.15～0.5 volt) " (step 104), " normal stereo earphone (0 volt) " (step 105), " being higher than 2 volts is line control earphone or the TVOUT line that do not have plug-in to look " (step 106) respectively;

(1.4) step 103 enters next step 107;

(1.5) send order OX02 (step 107);

(1.6) if the testing result of step 107 is " obtaining return value ", then enter " line control earphone, and Mic disconnects " (step 109);

(1.7), then enter " being common " (step 108) not with the earphone of linearity if the testing result of step 107 be " not waiting until return value ";

(1.8) step 106 enters next step (110);

(1.9) if the testing result of step 110 for obtaining return value OX81, is then directly gone into " being line control earphone " (step 111);

(1.10) if the testing result of step 110 is " not obtaining return value ", then enter " the TVOUT line that does not have plug-in to look " (step 112).

The operation principle of earphone interface circuit:

Comprised head circuit and analog switching circuit among Fig. 2, HSMIC_LINECONTR is the output signal of head circuit, after it is selected by analog switch, imports base band again and handles.Its basic principle is: ADC5_HF_MIC detects the input signal of earphone, by the output of baseband chip processing back judgement earphone is MIC signal or line traffic control signal, control analog switch by control signal HS_LC_EN of base band output again, to realize separating of HS_MIC signal and LINE_CON_KEYPAD signal.

The above only is preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to the covering scope of claim of the present invention.

Claims (1)

1. the control method of a judging insertion type of earphone by mobile phone is characterized in that, comprises the following step:

(1.1) under the IDLE of mobile phone state, do not insert earphone, the analog switch on the mobile phone is received GPIO end (step 101);

(1.2) detect the insertion earphone, analog switch is received MicBisa and is opened ADC sampling (step 102);

(1.3) judge sampled value, enter " the line control earphone microphone has connected or the earphone (0.5～1.2 volt) of normal tape MIC " (step 103), " IVOUT line (0.15～0.5 volt) " (step 104), " normal stereo earphone (0 volt) " (step 105), " being higher than 2 volts is line control earphone or the TVOUT line that do not have plug-in to look " (step 106) respectively;

(1.4) step 103 enters next step 107;

(1.5) send order OX02 (step 107);

(1.6) if the testing result of step 107 is " obtaining return value ", then enter " line control earphone, and Mic disconnects " (step 109);

(1.7), then enter " being common " (step 108) not with the earphone of linearity if the testing result of step 107 be " not waiting until return value ";

(1.8) step 106 enters next step (110);

(1.9) if the testing result of step 11O for obtaining return value OX81, is then directly gone into " being line control earphone " (step 111);

(1.10) if the testing result of step 110 is " not obtaining return value ", then enter " the TVOUT line that does not have plug-in to look " (step 112).

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