CN104023294B - Interface duplex device and pinboard in terminal - Google Patents
Interface duplex device and pinboard in terminal Download PDFInfo
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- CN104023294B CN104023294B CN201410239361.1A CN201410239361A CN104023294B CN 104023294 B CN104023294 B CN 104023294B CN 201410239361 A CN201410239361 A CN 201410239361A CN 104023294 B CN104023294 B CN 104023294B
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Abstract
The embodiment of the present invention provides the interface duplex device and pinboard in a kind of terminal.The device includes：USB interface, handover module, detection control module, audio circuit module and USB circuit module；USB interface includes data wire pin and ID pins, and detection control module is connected with the output end and handover module of ID pins, and handover module is connected with the output end of data wire pin and ID pins, audio circuit module and USB circuit module.The device type that output electric signal identification of the detection control module by detecting ID pins is accessed；Handover module opens USB interface and the path of USB circuit module or audio circuit module according to device type；When the device type of access is earphone, MIC signals are transmitted by ID pins.This programme realizes the multiplexing of USB interface and earphone interface, while avoiding existing by the VBUS pins transmission MIC signals Negative pressure prevention brought and the interference problem that charges in USB interface.
Description
Technical Field
The embodiment of the invention relates to the technical field of electronic communication, in particular to an interface multiplexing device and a patch panel in a terminal.
Background
With The development of communication technology, mobile terminals have become indispensable and portable articles in people's life, so mobile terminals have more and more functions and applications, and more interfaces are needed for application on mobile terminals, taking mobile phones as examples, audio signal transmission and Universal Serial Bus (USB) data transmission are The most basic two applications, so that an earphone interface and a USB interface need to be arranged in The mobile phones, The transmission of audio signals is realized through The earphone interface, and The interaction with USB devices and otg (on The go) devices is realized through The USB interface.
Currently, a USB interface of a mobile terminal generally includes 5 pins, which are a power line (VBUS) pin, a negative data line (DM) pin, a positive data line (DP) pin, an ID pin, and a Ground (GND) pin. The earphone interface generally includes a left channel terminal, a right channel terminal, a ground terminal, and a Microphone (MIC) terminal.
Generally, the earphone interface and the USB interface of the mobile terminal are separately disposed on the mobile terminal, however, the earphone interface limits the ultra-thin design of the mobile terminal product, and therefore, the multiplexing technology of the USB interface is developed.
The existing multiplexing technology of the USB interface generally includes: multiplexing a left sound channel end and a DM pin, multiplexing a right sound channel end and a DP pin, and multiplexing an MIC end and a VBUS pin, namely respectively transmitting a left sound channel signal and a right sound channel signal by using the DM pin and the DP pin of a USB interface, and transmitting the MIC signal by using the VBUS pin, thereby realizing multiplexing of the USB interface and an earphone interface.
The above earphone interface and USB interface multiplexing technology has the following disadvantages: the multiplexing of the MIC end and the VBUS pin is realized through a single-pole double-throw switch, and the port is not subjected to negative pressure protection, so that the problem that a device connected with the VBUS pin is burnt possibly is caused; and, since both the MIC signal and the charging power source use the VBUS pin, there may be a problem of charging interference.
Disclosure of Invention
The embodiment of the invention provides an interface multiplexing device in a terminal, which is used for realizing a new USB interface multiplexing scheme so as to avoid the problems of negative pressure protection and charging interference in the prior art and identify the type of equipment accessed to a USB interface. The embodiment of the invention also provides a patch panel to realize the USB interface multiplexing scheme and avoid the problems of negative pressure protection and charging interference in the prior art.
In a first aspect, an embodiment of the present invention provides an interface multiplexing apparatus in a terminal, including:
the device comprises a Universal Serial Bus (USB) interface, a switching module, a detection control module, an audio circuit module and a USB circuit module; wherein,
the USB interface comprises a data line pin and an ID pin, the detection control module is connected with the output end of the ID pin and the switching module, and the switching module is connected with the output end of the data line pin, the output end of the ID pin, the audio circuit module and the USB circuit module;
the detection control module is used for: after the external equipment is connected with the USB interface, detecting the electric signal parameter value of the output end of the ID pin, determining the equipment type of the external equipment according to the detection result, and sending the indication information of the equipment type to the switching module; the device type comprises an earphone and a USB device, when the device type is the earphone, the input end of the ID pin is connected with the microphone MIC end of the earphone plug, and the input end of the data line pin is connected with the sound channel end of the earphone plug;
the switching module is configured to: after receiving the indication information, if the indication information indicates that the external equipment is USB equipment, opening a signal transmission path between the output end of the data line pin and the USB circuit module; and if the indication information indicates that the external equipment is an earphone, opening the output end of the data line pin or a signal transmission path between the output end of the data line pin and the output end of the ID pin and the audio circuit module.
In a second aspect, an embodiment of the present invention provides an interposer, including:
an earphone interface and a USB plug; the earphone interface comprises a sound channel end and an MIC end, and the USB plug comprises a data line pin and an ID pin;
the sound channel end of the earphone interface is connected with the data line pin of the USB plug, the MIC end of the earphone interface is connected with the ID pin of the USB plug, so that after the earphone plug is connected with the earphone interface and the USB plug is connected with the USB interface in the terminal, the MIC end of the earphone plug is connected with the input end of the ID pin of the USB interface in the terminal, and the sound channel end of the earphone plug is connected with the input end of the data line pin of the USB interface in the terminal.
In the interface multiplexing device in the terminal provided by the embodiment of the invention, the detection control module identifies the type of the accessed equipment by detecting the output electric signal of the ID pin, wherein the equipment type comprises an earphone and a USB (universal serial bus) device; the switching module opens a passage between the USB interface and the USB circuit module or the audio circuit module according to the type of the accessed equipment, so that the accessed external equipment and the terminal carry out signal transmission; and when the type of the accessed equipment is the earphone, the ID pin of the USB interface is connected with the MIC end of the earphone plug, so that the aim of transmitting MIC signals through the ID pin is fulfilled. Therefore, the multiplexing of the USB interface and the earphone interface is realized, and the problems of negative pressure protection and charging interference caused by transmitting MIC signals through the VBUS pin of the USB interface in the prior art are solved.
According to the adapter plate provided by the embodiment of the invention, the audio channel end of the earphone interface is connected with the data line pin of the USB plug, and the MIC end of the earphone interface is connected with the ID pin of the USB plug through the resistor, so that after the earphone plug is connected with the earphone interface on the adapter plate and the USB plug on the adapter plate is connected with the USB interface in the terminal, the MIC end of the earphone plug is connected with the ID pin of the USB interface in the terminal, and the audio channel end of the earphone plug is connected with the data line pin of the USB interface in the terminal, so that the connection between the earphone and the interface multiplexing device in the terminal is realized, and the multiplexing scheme of the USB interface in the terminal is further realized; and when the earphone is connected with the interface multiplexing device in the terminal through the adapter plate, the MIC end of the earphone plug is connected with the ID pin of the USB interface in the interface multiplexing device, so that the ID pin of the USB interface can be used for transmitting an MIC signal, and the problems of negative pressure protection and charging interference caused by the fact that the VBUS pin is used for transmitting the MIC signal in the prior art are solved.
Drawings
While the drawings that accompany the present invention can be briefly described as preferred for better clarity, it should be apparent that the drawings described below are illustrative of some embodiments of the invention and that other drawings can be derived by those skilled in the art without inventive faculty.
Fig. 1 is a schematic structural diagram of an interface multiplexing apparatus in a terminal according to an embodiment of the present invention;
fig. 2a is a schematic structural diagram of a three-section type earphone plug according to a second embodiment of the present invention;
fig. 2b is a schematic structural diagram of a four-segment type earphone plug according to a second embodiment of the present invention;
fig. 2c is a schematic structural diagram of an interposer according to a second embodiment of the present invention;
fig. 3 is a schematic flowchart of an interface multiplexing method according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be further described in detail with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and not restrictive thereof, and that all other embodiments obtained by those of ordinary skill in the art that do not create inventive faculty are intended to be included within the scope of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
The first embodiment is as follows:
fig. 1 is a schematic structural diagram of an interface multiplexing apparatus in a terminal according to an embodiment of the present invention. The terminal may be a tablet computer, a Personal Digital Assistant (PDA), a smart phone, and the like.
The interface multiplexing device includes: a Universal Serial Bus (USB) interface 11, a switching module 12, a detection control module 13, an audio circuit module 14, and a USB circuit module 15.
The USB interface 11 includes a data line pin and an ID pin 111, the detection control module 13 is connected to the output end of the ID pin 111 and the switching module 12, and the switching module 12 is connected to the output end of the data line pin, the output end of the ID pin 111, the audio circuit module 14, and the USB circuit module 15.
The detection control module 13 may be connected to the switching module 12 through an integrated circuit bus.
After the external device is connected to the USB interface 11, the detection control module 13 detects the electrical signal parameter value at the output end of the ID pin 111, determines the device type of the external device according to the detection result, and sends the indication information of the device type to the switching module 12. Wherein the device types may include a headset and a USB device.
Preferably, the detection control module 13 may determine the device type of the external device according to the following method: and determining the device type corresponding to the detected electric signal parameter value at the output end of the ID pin 111 according to the corresponding relation between the preset electric signal parameter value range and the device type, and taking the determined device type as the device type of the external device.
In other words, the preset value range of the electrical signal parameter at least includes two non-overlapping value ranges of the electrical signal parameter, such as a first value range of the electrical signal parameter and a second value range of the electrical signal parameter, where one of the two value ranges corresponds to the headset device and the other one corresponds to the USB device, that is, the corresponding relationship between the preset value range of the electrical signal parameter and the device type at least includes two corresponding relationships, one is used for identifying the headset device and the other is used for identifying the USB device.
The first electrical signal parameter range corresponds to the earphone device, and the second electrical signal parameter range corresponds to the USB device. The detection control module 13 detects an electrical signal parameter value at the output end of the ID pin 111, determines a preset electrical signal parameter value range to which the electrical signal parameter value at the output end of the ID pin 111 belongs, and determines that the accessed device type is an earphone according to a corresponding relationship between the preset electrical signal parameter value range and the device type if the determination result is that the electrical signal parameter value at the output end of the ID pin 111 is within the first electrical signal parameter range; and if the determination result is that the electric signal parameter value of the output end of the ID pin 111 is within the second electric signal parameter range, determining that the accessed device type is a USB device according to a preset corresponding relationship between the electric signal parameter value range and the device type.
After receiving the indication information sent by the detection control module 13, the switching module 12 may specifically complete one of the following three operations:
if the indication information indicates that the external device is a USB device, the switching module 12 opens a signal transmission path between the output end of the data line pin and the USB circuit module 15 to connect the USB circuit module 15 to the USB interface 11, and subsequent USB devices communicate with the USB circuit module 15 through the data line pin using a USB protocol.
If the indication information indicates that the external device is an earphone, the switching module 12 opens a signal transmission path between the output end of the data line pin and the audio circuit module 14, so that the audio circuit module 14 is connected to the USB interface 11 through the data line pin. The sound signal output by the subsequent audio circuit module 14 is transmitted to the earphone through the data line pin, so that the user can hear the sound.
If the indication information indicates that the external device is an earphone, the switching module 12 opens a signal transmission path between the output end of the data line pin and the output end of the ID pin 111 and the audio circuit module 14, so as to connect the audio circuit module 14 to the USB interface 11 through the data line pin and the ID pin 111. The sound channel signal output by the subsequent audio circuit module 14 is transmitted to the earphone through the data line pin, so that the user can hear the sound, and the MIC signal collected by the earphone is transmitted to the audio circuit module 14 through the ID pin for processing.
When the USB circuit module 15 is connected to the USB interface 11, the data line pin of the USB interface 11 is used; when the audio circuit module 14 is connected to the USB interface 11, there are two ways, the first using the data line pin, the second using the data line pin and the ID pin 111. Two different connection modes can realize the interaction between different types of earphones and the audio circuit module 14, specifically, the first connection mode can realize the interaction between a three-section type earphone and the audio circuit module 14, and the second connection mode can realize the interaction between a four-section type earphone and the audio circuit module 14.
When the device type is an earphone, the connection mode between the earphone plug and the USB interface 11 is as follows: the input end of the ID pin 111 is connected to a Microphone (MIC) end of the earphone plug, and the input end of the data line pin is connected to a sound channel end of the earphone plug.
It should be noted that, when the device type is an earphone, the connection mode between the earphone plug and the USB interface 11 is applicable to both a three-segment type earphone and a four-segment type earphone.
In the interface multiplexing device in the terminal provided by the embodiment of the invention, the detection control module identifies the type of the accessed equipment by detecting the output electric signal of the ID pin, wherein the equipment type comprises an earphone and a USB (universal serial bus) device; the switching module opens a passage between the USB interface and the USB circuit module or the audio circuit module according to the type of the accessed equipment, so that the accessed external equipment and the terminal carry out signal transmission; and when the type of the accessed equipment is the earphone, the ID pin of the USB interface is connected with the MIC end of the earphone plug, so that the aim of transmitting MIC signals through the ID pin is fulfilled. Therefore, the multiplexing of the USB interface and the earphone interface is realized, and the problems of negative pressure protection and charging interference caused by transmitting MIC signals through the VBUS pin of the USB interface in the prior art are solved.
Preferably, the device types may also include OTG devices; the switching module 12 may be further configured to: after receiving the indication information, if the indication information indicates that the external device is an OTG device, a signal transmission path between the output end of the data line pin and the USB circuit module 15 is opened, so that the OTG device and the USB circuit module 15 communicate by using an OTG protocol.
It should be noted that, the detection control module 13 preferably determines the device type of the external device according to the following method: and determining the device type corresponding to the detected electric signal parameter value at the output end of the ID pin 111 according to the corresponding relation between the preset electric signal parameter value range and the device type, and taking the determined device type as the device type of the external device. The preset electric signal parameter value range for identifying the three-section type earphone, the preset electric signal parameter value range for identifying the four-section type earphone, the preset electric signal parameter value range for identifying the USB device and the preset electric signal parameter value range for identifying the OTG device are different.
In the above solution, the audio circuit module 14 includes a sound channel circuit, an MIC circuit and an audio encoder on a main board of the terminal. The audio encoder encodes MIC signals transmitted by the MIC circuit and an ID pin of a USB interface;
wherein the switching module 12 is configured to: when the indication information indicates that the external equipment is a three-section type earphone, opening a channel between the output end of a data line pin of the USB interface and the sound channel circuit so that a sound signal output by the sound channel circuit is transmitted to the earphone through the data line pin, and a user hears sound; sending a trigger signal for enabling the MIC circuit to be in a working state, and sending the acquired MIC signal to the audio encoder for encoding after the MIC circuit is in the working state; when the external equipment is determined to be a four-section type earphone according to the indication information, a channel between the output end of the data line pin and the sound channel circuit is opened, and a channel between the output end of the ID pin 111 and the audio encoder is opened, so that a sound signal output by the sound channel circuit is transmitted to the earphone through the data line pin, a user hears sound, and an MIC signal collected by the earphone is transmitted to the audio encoder through the ID pin for encoding processing.
Example two:
in this embodiment, on the basis of the above embodiment, the connection mode between the headphone plug and the USB interface 11 is further optimized.
The data line pins of the USB interface 11 include a positive data line (DP) pin 112 (shown in fig. 1) and a negative data line (DM) pin 113 (shown in fig. 1).
Please refer to fig. 2 a-2 c. Fig. 2a and fig. 2b are schematic structural diagrams of a three-segment type earphone plug and a four-segment type earphone plug according to a second embodiment of the present invention. As shown in fig. 2a, the three-segment headphone jack includes a channel end and a MIC end 21, wherein the channel segment includes a right channel end 22 and a left channel end 23, and the MIC end 21 is grounded.
When an external device is connected to the USB interface 11 and the device type of the external device is a three-segment type earphone, the input terminal of the DM pin 113 of the USB interface 11 is connected to the left channel terminal 23 of the three-segment type earphone plug, and the input terminal of the DP pin 112 is connected to the right channel terminal 22 of the three-segment type earphone plug; the input of the ID pin 111 is connected to the MIC terminal 21 of the three-piece headphone jack.
As shown in fig. 2b, the four-segment headphone plug includes a channel end, a MIC end 31, and a GND end 34, wherein the channel segment includes a right channel end 32 and a left channel end 33.
When an external device is connected to the USB interface 11 and the device type of the external device is a four-segment earphone, the input terminal of the DM pin 113 of the USB interface 11 is connected to the left channel terminal 33 of the four-segment earphone plug, and the input terminal of the DP pin 112 is connected to the right channel terminal 32 of the four-segment earphone plug; the input end of the ID pin 111 is connected with an MIC end 21 of the four-section type earphone plug; the input 114 (shown in fig. 1) of the GND pin of the USB interface 11 is connected to the GND terminal 34 of the four-segment earphone plug.
It should be noted that the connection manner between the sound channel end of the three-section type earphone plug or the four-section type earphone plug and the data line pin of the USB interface in the interface multiplexing device is not limited to the connection manner in this embodiment, that is, the connection manner between the sound channel end of the three-section type earphone plug and the data line pin of the USB interface in the interface multiplexing device may further include: the input end of the DM pin of the USB interface is connected with the right sound channel end of the three-section type earphone plug, and the input end of the DP pin is connected with the left sound channel end of the three-section type earphone plug.
Similarly, the connection mode between the channel end of the four-segment type earphone plug and the data line pin of the USB interface in the interface multiplexing device may further include: the input end of the DM pin of the USB interface is connected with the right sound channel end of the four-section type earphone plug, and the input end of the DP pin is connected with the left sound channel end of the four-section type earphone plug.
Preferably, the connection mode of the three-segment earphone plug or the four-segment earphone plug and the USB interface 11 may include: and the three-section type earphone plug or the four-section type earphone plug is connected with the USB interface 11 through the adapter plate. As shown in fig. 2c, the interposer includes: an earphone interface 41 and a USB plug 42; the earphone plug is connected with the earphone interface 41 of the adapter plate, and the USB plug 42 of the adapter plate is connected with the USB interface 11.
Wherein, the connection of the earphone plug and the earphone interface 41 of the adapter plate specifically includes: the three-section type earphone plug or the four-section type earphone plug is connected with the earphone interface 41 of the adapter plate.
The earphone interface 41 comprises a channel end and an MIC end 411, and the USB plug 42 comprises a data line pin and an ID pin 421; the sound channel end of the earphone interface 41 is connected with the data line pin of the USB plug 42, the MIC end 411 of the earphone interface 41 is connected with the ID pin 421 of the USB plug 42, so that after the earphone plug is connected with the earphone interface 41 and the USB plug 42 is connected with the USB interface in the terminal, the MIC end of the earphone plug is connected with the input end of the ID pin of the USB interface in the terminal, and the sound channel end of the earphone plug is connected with the input end of the data line pin of the USB interface in the terminal.
Preferably, a resistor 43 is connected in series between the MIC terminal 411 of the earphone interface 41 and the ID pin 421 of the USB plug 42, and the resistor 43 has a relative impedance value. By connecting the resistor 43 in series between the MIC terminal 411 of the headset interface 41 and the ID pin 421 of the USB plug 42, it is possible to avoid the problem that the detection control module 13 cannot distinguish whether the connected headset or other device is a headset or other device when the absolute impedance of the headset is the same as the absolute impedance of other device, such as an OTG device. The resistance value of the resistor 43 may be determined according to the detection accuracy of the detection control module 13, such as 75 ohms.
Specifically, the data line pins of the USB plug 42 include a positive data line pin 422 and a negative data line pin 423. The channel ends of the headphone interface 41 comprise a right channel end 412 and a left channel end 413. The sound channel end of the earphone interface 41 is connected to the data line pin of the USB plug 42, and includes: the right channel end 412 of the earphone interface 41 is connected to the positive data line pin 422 of the USB plug 42, and the left channel end 413 of the earphone interface 41 is connected to the negative data line pin 423 of the USB plug 42.
Further, the earphone interface 41 may further include a ground terminal 414, and the USB plug 42 may further include a ground pin 424 and a floating VBUS pin 425; the ground terminal 414 of the earphone interface 41 is connected to the ground pin 424 of the USB plug 42.
The USB plug 42 of the adapter board is connected to the USB interface 11, and specifically includes: the output end of the ID pin 421 of the USB plug 42 of the adapter board is connected to the input end of the ID pin 111 of the USB interface 11; the output end of the positive data line pin 422 of the USB plug 42 of the adapter board is connected to the input end of the DP pin 112 of the USB interface 11; the output end of the negative data line pin 423 of the USB plug 42 of the adapter board is connected to the input end of the DM pin 113 of the USB interface 11; the output end of the ground pin 424 of the USB plug 42 of the adapter board is connected to the input end of the GND pin 114 of the USB interface 11; the output terminal of the VBUS pin 425 of the USB plug 42 of the interposer is connected to the input terminal of the VBUS pin 115 (shown in fig. 1) of the USB interface 11.
According to the technical scheme of the embodiment, the connection of the three-section type earphone or the four-section type earphone and the interface multiplexing device in the terminal is realized through the adapter plate.
It should be noted that, when the device type of the external device is a USB device or an OTG device, the USB device or the OTG device can be connected to the USB interface 11 of the interface multiplexing apparatus in the terminal without an adapter board, and therefore, the electrical signal parameter value of the output end of the ID pin 111 detected by the detection control module 13 is related to the USB device or the OTG device itself; when the type of the external device is a three-segment earphone or a four-segment earphone, an adapter board is required to connect the three-segment earphone or the four-segment earphone to the USB interface 11 of the interface multiplexing device in the terminal, specifically, the MIC terminal 411 of the earphone interface 41 is connected to the ID pin 421 of the USB plug 42 through the resistor 43, and the USB plug 42 of the adapter board is connected to the USB interface 11, so that the electrical signal parameter value of the output terminal of the ID pin 111 detected by the detection control module 13 is related to the three-segment earphone or the four-segment earphone itself and is related to the resistance value of the resistor.
It should be further noted that the electrical signal parameter value at the output end of the ID pin 111 may include impedance, current, voltage, or other parameters, which is not limited in this embodiment, as long as different access devices can be identified by different electrical signal parameter values.
Example three:
in this embodiment, on the basis of the above embodiment, the detection control module detects the electrical signal parameter value at the output end of the ID pin of the USB interface, and determines the device type of the external device according to the detection result, which is further optimized as follows: the detection control module determines the device type of the external device according to the following method: and determining the device type corresponding to the detected electric signal parameter value of the output end of the ID pin according to the corresponding relation between the preset electric signal parameter value range and the device type, and taking the determined device type as the device type of the external device.
Wherein the electrical signal parameter value is preferably an impedance value.
Specifically, when the parameter value of the electrical signal is an impedance value, the corresponding relationship between the value range of the electrical signal parameter and the type of the device includes:
the first impedance value corresponds to the OTG device; the first impedance value is an absolute impedance value of the OTG equipment;
the second impedance value corresponds to the USB device; the second impedance value is an absolute impedance value of the USB device;
the third impedance value corresponds to the three-section type earphone; the third impedance value is the sum of the absolute impedance value and the relative impedance value of the three-section earphone;
the fourth impedance value corresponds to a four-section type earphone; the fourth impedance value is the sum of the absolute impedance value and the relative impedance value of the four-section earphone.
The relative impedance value is the impedance value of the resistor 43 in the interposer.
Preferably, the detection control module is configured to: and detecting the electric signal parameter value of the output end of the ID pin by adopting an Analog-to-Digital Converter (ADC) detection method. The ADC detection method is to detect the impedance value of the output end of the ID pin 111 of the USB interface 11, perform sampling and quantization processing, and determine the type of the accessed device according to the quantized impedance value.
The following description will be made specifically by taking the correspondence relationship shown in table 1 as an example.
TABLE 1
When the device type of the external device is a USB device or an OTG device, the USB device or the OTG device can be connected to the USB interface 11 of the interface multiplexing apparatus in the terminal without an adapter board, and therefore, the impedance value of the output end of the ID pin 111 detected by the detection control module 13 is an absolute impedance value of the USB device or the OTG device itself. Specifically, if the impedance value of the output end of the ID pin 111 detected by the detection control module 13 is 0 Ω, that is, corresponds to the first impedance value, the device type of the accessed external device may be determined to be an OTG device according to a preset corresponding relationship between an impedance value range and the device type; if the impedance value of the output end of the ID pin 111 detected by the detection control module 13 is infinite (NC), that is, corresponds to the second impedance value, the device type of the accessed external device may be determined to be a USB device according to a preset correspondence between the impedance value range and the device type.
When the type of the external device is a three-segment earphone or a four-segment earphone, an adapter board is required to connect the three-segment earphone or the four-segment earphone to the USB interface 11 of the interface multiplexing device in the terminal, specifically, the MIC terminal 411 of the earphone interface 41 is connected to the ID pin 421 of the USB plug 42 through the resistor 43, and the USB plug 42 of the adapter board is connected to the USB interface 11, so that the impedance value of the output terminal of the ID pin 111 detected by the detection control module 13 is the sum of the absolute impedance value of the three-segment earphone and the relative impedance value of the resistor 43, or the sum of the absolute impedance value of the four-segment earphone and the relative impedance value of the resistor 43. For example, if the impedance value of the output end of the ID pin 111 detected by the detection control module 13 is 75 Ω, that is, corresponds to a third impedance value, according to the corresponding relationship between the preset impedance value range and the device type, it may be determined that the device type of the accessed external device is a three-segment type earphone; if the impedance value of the output end of the ID pin 111 detected by the detection control module 13 is 275 Ω, that is, corresponds to a fourth impedance value, the device type of the accessed external device may be determined to be a four-segment type earphone according to a preset correspondence between the impedance value range and the device type.
In the above solution, the audio circuit module 14 includes a sound channel circuit, an MIC circuit and an audio encoder on a main board of the terminal.
After receiving the indication information of the device type sent by the detection control module 13, the switching module 12 may complete one of the following four operations:
if the indication information indicates that the external device is a USB device, the switching module 12 opens a signal transmission path between the output end of the data line pin and the USB circuit module 15 to connect the USB circuit module 15 to the USB interface 11, and subsequent USB devices communicate with the USB circuit module 15 through the data line pin using a USB protocol.
If the indication information indicates that the external device is an OTG device, the switching module 12 opens a signal transmission path between the output end of the data line pin and the USB circuit module 15 to connect the USB circuit module 15 to the USB interface 11, so that the OTG device and the USB circuit module 15 communicate with each other by using an OTG protocol.
If the indication information indicates that the external device is a three-segment type earphone, the switching module 12 opens a signal transmission path between the output end of the data line pin and the audio circuit module 14 to enable the audio circuit module 14 to be connected to the USB interface 11 through the data line pin, that is, the switching module 12 opens a path between the data line pin of the USB interface 11 and the sound channel circuit of the audio circuit module 14 to transmit the sound channel signal of the three-segment type earphone, and sends a trigger signal for enabling the MIC circuit of the audio circuit module 14 to be in a working state, that is, the MIC signal of the three-segment type earphone is transmitted through the MIC circuit located on the main board. In other words, the ID pin 111 does not serve as a channel for the MIC signal of the three-piece headset.
If the indication information indicates that the external device is a four-segment type earphone, the switching module 12 opens a signal transmission path between the output end of the data line pin and the output end of the ID pin 111 and the audio circuit module 14 to connect the audio circuit module 14 to the USB interface 11 through the data line pin and the ID pin 111, that is, the switching module 12 opens a path between the data line pin of the USB interface 11 and the sound channel circuit of the audio circuit module 14 to transmit a sound channel signal of the four-segment type earphone; and opens a path between the output terminal of the ID pin 111 and the audio encoder of the audio circuit module 14 to transmit an MIC signal of the four-segment type earphone. In other words, the ID pin 111 serves as a channel for MIC signals of the four-segment type earphone.
Example four:
in this embodiment, an interface multiplexing method is provided based on the interface multiplexing apparatus in the first embodiment, and as shown in fig. 3, the interface multiplexing method includes the following steps:
step 40: after the external equipment is connected with the USB interface in the interface multiplexing device, the detection control module detects the electric signal parameter value of the output end of the ID pin of the USB interface, determines the equipment type of the external equipment according to the detection result, and sends the indication information of the equipment type to the switching module in the interface multiplexing device; the device types include headphones and USB devices;
step 41: after receiving the indication information, if the external equipment is indicated to be USB equipment by the indication information, the switching module opens a signal transmission path between the output end of the data line pin of the USB interface and the USB circuit module; and if the indication information indicates that the external equipment is an earphone, opening the output end of the data line pin or a signal transmission path between the output end of the data line pin and the output end of the ID pin and an audio circuit module.
Specifically, the method comprises the following steps: in step 40, the device type of the external device may be determined as follows:
and determining the device type corresponding to the detected electric signal parameter value of the output end of the ID pin according to the corresponding relation between the preset electric signal parameter value range and the device type, and taking the determined device type as the device type of the external device.
Preferably, the device types may also include OTG devices; correspondingly, step 41 further comprises: after the indication information is received, if the indication information indicates that the external device is an OTG device, a signal transmission path between the output end of the data line pin and the USB circuit module is opened, so that the OTG device and the USB circuit module communicate by using an OTG protocol.
Preferably, when the external device is an earphone, the earphone plug is connected with the USB interface through the adapter plate; the adapter plate comprises an earphone interface and a USB plug; the earphone plug is connected with the earphone interface of the adapter plate, and the USB plug of the adapter plate is connected with the USB interface; wherein,
the earphone interface comprises a sound channel end and an MIC end, and the USB plug comprises a data line pin and an ID pin; the sound channel end of the earphone interface is connected with the data line pin of the USB plug, the MIC end of the earphone interface is connected with the ID pin of the USB plug through a resistor, and the resistor has a relative impedance value.
Preferably, when the detected parameter value of the electrical signal is an impedance value, the corresponding relationship between the value range of the electrical signal parameter and the device type may include:
the first impedance value corresponds to the OTG device; the first impedance value is an absolute impedance value of the OTG equipment;
the second impedance value corresponds to the USB device; the second impedance value is an absolute impedance value of the USB device;
the third impedance value corresponds to the three-section type earphone; the third impedance value is the sum of the absolute impedance value and the relative impedance value of the three-section earphone;
the fourth impedance value corresponds to a four-section type earphone; the fourth impedance value is the sum of the absolute impedance value and the relative impedance value of the four-section earphone.
Specifically, the audio circuit module comprises a sound channel circuit, an MIC circuit and an audio encoder which are located on a main board of the terminal; in step 41, if the indication information indicates that the external device is an earphone, the output end of the data line pin is opened, or a signal transmission path between the output end of the data line pin and the output end of the ID pin and the audio circuit module is opened, which may be specifically implemented as follows:
when the indication information indicates that the external equipment is a three-section type earphone, opening a path between an output end of a data line pin of a USB interface and a sound channel circuit in the audio circuit module, and sending a trigger signal for enabling an MIC circuit in the audio circuit module to be in a working state;
and when the external equipment is determined to be a four-section type earphone according to the indication information, opening a path between the output end of the data line pin and the sound channel circuit, and opening a path between the output end of the ID pin and the audio encoder.
Specifically, the detection control module may detect the electrical signal parameter value at the output end of the ID pin by using an analog-to-digital conversion ADC detection method.
It should be noted that the USB interface in each of the above embodiments may be a Mini USB interface or a Micro USB interface, and the USB interface in fig. 1 takes a 5-pin USB interface as an example, and may also be a 7-pin USB interface, where the 7-pin USB interface is added with one VBUS pin and one GND pin compared with the 5-pin USB interface.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; the preferred embodiments are given by way of example and not limitation, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. An interface multiplexing apparatus in a terminal, the apparatus comprising:
the device comprises a Universal Serial Bus (USB) interface, a switching module, a detection control module, an audio circuit module and a USB circuit module; wherein,
the USB interface comprises a data line pin and an ID pin, the detection control module is connected with the output end of the ID pin and the switching module, and the switching module is connected with the output end of the data line pin, the output end of the ID pin, the audio circuit module and the USB circuit module;
the detection control module is used for: after the external equipment is connected with the USB interface, detecting the electric signal parameter value of the output end of the ID pin, determining the equipment type of the external equipment according to the detection result, and sending the indication information of the equipment type to the switching module; the device type comprises an earphone and a USB device, when the device type is the earphone, the input end of the ID pin is connected with the microphone MIC end of an earphone plug, the input end of the data line pin is connected with the sound channel end of the earphone plug, and the reference value of the electric signal is an impedance parameter;
the switching module is configured to: after receiving the indication information, if the indication information indicates that the external equipment is USB equipment, opening a signal transmission path between the output end of the data line pin and the USB circuit module; and if the indication information indicates that the external equipment is an earphone, opening the output end of the data line pin or a signal transmission path between the output end of the data line pin and the output end of the ID pin and the audio circuit module.
2. The apparatus of claim 1, wherein the detection control module is to: determining a device type of the external device as follows:
and determining the device type corresponding to the detected electric signal parameter value of the output end of the ID pin according to the corresponding relation between the preset electric signal parameter value range and the device type, and taking the determined device type as the device type of the external device.
3. The apparatus of claim 2, wherein the device types further comprise OTG devices;
the switching module is further configured to: after the indication information is received, if the indication information indicates that the external device is an OTG device, a signal transmission path between the output end of the data line pin and the USB circuit module is opened, so that the OTG device and the USB circuit module communicate by using an OTG protocol.
4. The apparatus of claim 3, wherein when the external device is a headset, a headset plug is connected to the USB interface through a patch panel; the adapter plate comprises an earphone interface and a USB plug; the earphone plug is connected with the earphone interface of the adapter plate, and the USB plug of the adapter plate is connected with the USB interface; wherein,
the earphone interface comprises a sound channel end and an MIC end, and the USB plug comprises a data line pin and an ID pin; the sound channel end of the earphone interface is connected with the data line pin of the USB plug, the MIC end of the earphone interface is connected with the ID pin of the USB plug through a resistor, and the resistor has a relative impedance value.
5. The apparatus of claim 4, wherein when the electrical signal parameter value is an impedance value, the correspondence between the electrical signal parameter value range and the device type comprises:
the first impedance value corresponds to the OTG device; the first impedance value is an absolute impedance value of the OTG equipment;
the second impedance value corresponds to the USB device; the second impedance value is an absolute impedance value of the USB device;
the third impedance value corresponds to the three-section type earphone; the third impedance value is the sum of the absolute impedance value and the relative impedance value of the three-section earphone;
the fourth impedance value corresponds to a four-section type earphone; the fourth impedance value is the sum of the absolute impedance value and the relative impedance value of the four-section earphone.
6. The apparatus of any one of claims 1-5, wherein the audio circuit module includes a channel circuit on a main board of the terminal, a MIC circuit, and an audio encoder connected to the MIC circuit;
the switching module is configured to: when the indication information indicates that the external equipment is a three-section type earphone, opening a path between an output end of a data line pin of the USB interface and the sound channel circuit, and sending a trigger signal for enabling the MIC circuit to be in a working state;
and when the external equipment is determined to be a four-section type earphone according to the indication information, opening a path between the output end of the data line pin and the sound channel circuit, and opening a path between the output end of the ID pin and the audio encoder.
7. The apparatus of any of claims 1-5, wherein the detection control module is to: and detecting the electric signal parameter value of the output end of the ID pin by adopting an analog-to-digital conversion (ADC) detection method.
8. The apparatus of any of claims 1-5, wherein the data line pins of the USB interface comprise a positive data line (DP) pin and a negative data line (DM) pin;
when an external device is connected with the USB interface and the device type of the external device is an earphone, the input end of the DM pin of the USB interface is connected with the left channel end of the earphone plug, and the input end of the DP pin is connected with the right channel end of the earphone plug.
9. An interposer, comprising:
an earphone interface and a USB plug; the earphone interface comprises a sound channel end and an MIC end, and the USB plug comprises a data line pin and an ID pin;
the audio channel end of the earphone interface is connected with the data line pin of the USB plug, the MIC end of the earphone interface is connected with the ID pin of the USB plug, so that after the earphone plug is connected with the earphone interface and the USB plug is connected with the USB interface in the terminal, the MIC end of the earphone plug is connected with the input end of the ID pin of the USB interface in the terminal, and the audio channel end of the earphone plug is connected with the input end of the data line pin of the USB interface in the terminal; and a resistor is connected in series between the MIC end of the earphone interface and the ID pin of the USB plug.
10. The patch panel of claim 9, wherein said headset interface further comprises a ground terminal, said USB plug further comprises a ground pin and a floating VBUS pin; and the grounding end of the earphone interface is connected with the grounding pin of the USB plug.
11. The patch panel according to claim 9 or 10, wherein the data line pins of the USB plug include a positive data line pin and a negative data line pin, and the audio channel ends of the headphone interface include a left audio channel end and a right audio channel end; wherein,
the positive data line pin is connected with the right sound channel end, and the negative data line pin is connected with the left sound channel end.
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Families Citing this family (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104461952A (en) * | 2014-11-28 | 2015-03-25 | 广东欧珀移动通信有限公司 | Interface sharing method and terminal |
| CN104572560A (en) * | 2015-01-26 | 2015-04-29 | 复旦大学无锡研究院 | USB (universal serial bus) and ADC (analog to digital converter) interface multiplex circuit and multiplex method |
| CN105281153B (en) * | 2015-03-02 | 2018-08-17 | 维沃移动通信有限公司 | A kind of interface, USB plug and mobile terminal |
| CN105071795A (en) * | 2015-08-17 | 2015-11-18 | 广东欧珀移动通信有限公司 | Multiplex circuit based on USB interface |
| CN110851387B (en) * | 2015-09-30 | 2022-08-19 | 联想(北京)有限公司 | Interface function configuration method and electronic equipment |
| CN105703185B (en) * | 2016-02-18 | 2018-03-16 | 北京小米移动软件有限公司 | Method for transmitting signals, device and adapter |
| CN105573946B (en) * | 2016-03-01 | 2019-03-01 | Oppo广东移动通信有限公司 | The method and device of Universal Serial Bus Interface multiplexing |
| CN105635885B (en) * | 2016-03-21 | 2019-05-07 | 青岛海信移动通信技术股份有限公司 | USB interface multiplex circuit, mobile terminal and earphone |
| CN105867874A (en) * | 2016-03-25 | 2016-08-17 | 乐视控股（北京）有限公司 | A user device |
| CN105740187B (en) * | 2016-04-01 | 2018-10-09 | 康泰医学系统（秦皇岛）股份有限公司 | A kind of USB multiplex interfaces circuit and the blood oxygen detection device for having the circuit |
| CN105868141B (en) * | 2016-04-18 | 2019-09-27 | 深圳市树源科技有限公司 | Digital interface adapter |
| CN106532383A (en) * | 2016-10-31 | 2017-03-22 | 深圳市金立通信设备有限公司 | Compatible design method and circuit |
| CN106412747A (en) * | 2016-11-04 | 2017-02-15 | 捷开通讯(深圳)有限公司 | Mobile terminal and earphone thereof |
| CN106856289B (en) * | 2016-11-30 | 2020-04-07 | 南昌黑鲨科技有限公司 | Electronic equipment and circuit thereof, switching equipment and circuit thereof and signal processing system |
| CN108271094B (en) * | 2016-12-30 | 2021-06-11 | 维沃移动通信有限公司 | Processing method of access equipment and mobile terminal |
| EP3553897B1 (en) | 2016-12-30 | 2020-11-11 | Huawei Technologies Co., Ltd. | Adaptor, device identifying method and device identifying apparatus |
| CN106802699A (en) * | 2017-03-27 | 2017-06-06 | 杭州联络互动信息科技股份有限公司 | The extended protection shell and Interface Expanding method of a kind of mobile terminal |
| CN108989535A (en) * | 2017-05-31 | 2018-12-11 | 维沃移动通信有限公司 | A kind of method and mobile terminal of data transmission |
| CN107203483A (en) * | 2017-06-26 | 2017-09-26 | 深圳天珑无线科技有限公司 | The interface circuit and electronic equipment of a kind of electronic equipment |
| CN107613126B (en) * | 2017-09-26 | 2020-03-10 | Oppo广东移动通信有限公司 | UART (Universal asynchronous receiver transmitter) and USB (Universal Serial bus) multiplexing circuit and mobile terminal |
| CN107635069B (en) * | 2017-09-27 | 2019-08-09 | Oppo广东移动通信有限公司 | UART and USB multiplex circuit and mobile terminal |
| CN108052467A (en) * | 2017-11-27 | 2018-05-18 | 努比亚技术有限公司 | A kind of interface self-adaption method, terminal and computer readable storage medium |
| CN108009116B (en) * | 2017-12-22 | 2021-01-05 | 努比亚技术有限公司 | MicroUSB interface circuit and mobile terminal thereof |
| CN108428454A (en) * | 2017-12-27 | 2018-08-21 | 广州音书科技有限公司 | A kind of tone frequency channel wire and system for Real-time speech recognition |
| CN108197060B (en) * | 2018-01-30 | 2022-06-28 | 深圳市启迈电子科技有限公司 | USB interface conversion device and method and mobile terminal |
| CN108595364A (en) * | 2018-04-28 | 2018-09-28 | 深圳市华星光电技术有限公司 | Data transmission system and data transmission method |
| CN109218880A (en) * | 2018-07-26 | 2019-01-15 | 上海与德通讯技术有限公司 | Earphone charging two-in-one circuit and control method, terminal |
| TWI702854B (en) * | 2018-08-27 | 2020-08-21 | 威盛電子股份有限公司 | Audio playing apparatus and audio transmission circuit |
| CN109284077A (en) * | 2018-10-11 | 2019-01-29 | 深圳市炬力北方微电子有限公司 | Interconnecting device and switching display methods |
| CN109446140A (en) * | 2018-12-29 | 2019-03-08 | 北京华力创通科技股份有限公司 | Micro USB interface comprehensive multiplexing circuit and electronic equipment |
| CN110855262B (en) * | 2019-11-13 | 2023-09-08 | 中电科思仪科技股份有限公司 | System and method for realizing multi-type audio output impedance |
| CN111324565A (en) * | 2020-03-19 | 2020-06-23 | 深圳源诚技术有限公司 | Multi-path USB interface switching system and method |
| CN112202949B (en) * | 2020-09-27 | 2022-06-24 | 厦门亿联网络技术股份有限公司 | USB peripheral, telephone equipment and telephone system |
| CN112468625B (en) * | 2020-11-30 | 2022-11-04 | 维沃移动通信有限公司 | Anti-distortion circuit, control method thereof and electronic equipment |
| CN112701509B (en) * | 2020-12-15 | 2022-09-09 | Oppo（重庆）智能科技有限公司 | Board-to-board connector socket, board-to-board connector and electronic equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179871A (en) * | 2006-11-10 | 2008-05-14 | 鸿富锦精密工业（深圳）有限公司 | Earphone and audio play device |
| CN201289641Y (en) * | 2008-11-19 | 2009-08-12 | 龙旗科技(上海)有限公司 | Mobile terminal with self-adapting minitype USB interface access equipment |
| CN101917497A (en) * | 2010-07-23 | 2010-12-15 | 惠州Tcl移动通信有限公司 | Method and device for earphone and USB to share micro-USB interface |
| CN101931674A (en) * | 2010-09-01 | 2010-12-29 | 惠州Tcl移动通信有限公司 | Method and device for sharing Micro-USB interface |
| CN102158575A (en) * | 2011-02-21 | 2011-08-17 | 深圳桑菲消费通信有限公司 | Method for expanding USB (Universal Serial Bus) interface of mobile terminal into earphone interface |
| CN203407007U (en) * | 2013-07-25 | 2014-01-22 | 北京握奇数据系统有限公司 | A data interface converting system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7450726B2 (en) * | 2004-03-11 | 2008-11-11 | Texas Instruments Incorporated | Headset detector in a device generating audio signals |
| JP2010251859A (en) * | 2009-04-10 | 2010-11-04 | Toshiba Corp | Mobile terminal |
-
2014
- 2014-05-30 CN CN201410239361.1A patent/CN104023294B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179871A (en) * | 2006-11-10 | 2008-05-14 | 鸿富锦精密工业（深圳）有限公司 | Earphone and audio play device |
| CN201289641Y (en) * | 2008-11-19 | 2009-08-12 | 龙旗科技(上海)有限公司 | Mobile terminal with self-adapting minitype USB interface access equipment |
| CN101917497A (en) * | 2010-07-23 | 2010-12-15 | 惠州Tcl移动通信有限公司 | Method and device for earphone and USB to share micro-USB interface |
| CN101931674A (en) * | 2010-09-01 | 2010-12-29 | 惠州Tcl移动通信有限公司 | Method and device for sharing Micro-USB interface |
| CN102158575A (en) * | 2011-02-21 | 2011-08-17 | 深圳桑菲消费通信有限公司 | Method for expanding USB (Universal Serial Bus) interface of mobile terminal into earphone interface |
| CN203407007U (en) * | 2013-07-25 | 2014-01-22 | 北京握奇数据系统有限公司 | A data interface converting system |
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