CN205883235U - Automatic intercom bluetooth adapter that discernment is connected - Google Patents

Abstract

The utility model provides an automatic intercom bluetooth adapter that discernment is connected includes pin port, treater, switch circuit, the pin port has general asynchronous receiving and dispatching transmission pin, state output pin and audio transmission pin, the treater has general asynchronous receiving and dispatching transmission end, state output and audio transmission end, and general asynchronous receiving and dispatching transmission end is connected with general asynchronous receiving and dispatching transmission pin, and the audio transmission end is connected with the audio transmission pin, switch circuit has signal connection end, switching element and a discernment end, and the signal connection end is connected with the signal input part of state output and switching element respectively, and discernment is held respectively and to be connected with the signal output part and the state output pin of switching element. Above -mentioned automatic intercom bluetooth adapter that discernment is connected has kept the technical problem of the function of telephoning basically of intercom host computer, can know that this process need not change original intercom host computer circuit software and hardware design, can adapt to the annex interface of the various forms of any model simultaneously.

Description

The interphone Bluetooth adapter that a kind of automatic identification connects

Technical field

This utility model relates to electronic circuit field, particularly relates to the transmitter receiver bluetooth adaptation that a kind of automatic identification connects Device.

Background technology

Traditional immersive simulation or digital handset are the most all withed a hook at the end and can be extended some external equipments such as headset, hand-held microphone Or the interface by its communication interface connection miscellaneous equipment, according to define on interface, main frame identifies that port level judges adnexa Connection status, this interface once recognizes the access of voice earphone adnexa, transmitter receiver main frame by close the machine inside loudspeaker and Internal Mike, switches to analog voice passage on the external equipment that just accessed.The accessory devices such as existing intercom headset hand-held microphone It is all to use wired connection, sometimes brings inconvenience emergency application onsite user.In order to break away from line, market occurs in that one in recent years A little and various transmitter receivers coordinate Bluetooth adapter, by attachment unit interface extend Bluetooth function, coordinate special Bluetooth headset or Hand-held microphone, allow tradition transmitter receiver quick change Bluetooth function, it is achieved short-range wireless speech or data communication function extension.

But, common Bluetooth adapter is all the recognition logic according to transmitter receiver HPI, adaptor interface pair That answers identifies that input port is arranged to the stationary state that the device type of host definition is corresponding, in order to make transmitter receiver main frame identification attached Part type.If bluetooth is because fortuitous event causes connecting aborted, bluetooth speech channel will disconnect automatically, now intercommunication owner The simulated voice passage of machine stills remain on the path connecting external equipment, internal Mike and loudspeaker all in closed mode, Meanwhile, in the short time transmitter receiver main frame cannot by bluetooth wireless initiate calling, also cannot receive calling speech, cause word or Broken words.

Utility model content

Based on this, it is necessary to for how solving when there is connecting aborted, keep the most logical of transmitter receiver main frame The technical problem of words function, it is provided that the interphone Bluetooth adapter that a kind of automatic identification connects.

The interphone Bluetooth adapter that a kind of automatic identification connects includes: pin port, processor, on-off circuit；Described Pin port has universal asynchronous receiving-transmitting transmission pin, State-output pin and audio transmission pin；Described processor has Universal asynchronous receiving-transmitting transmission ends, state output end and audio transmission end, described universal asynchronous receiving-transmitting transmission ends is gone here and there by UART Row data/address bus is connected with described universal asynchronous receiving-transmitting transmission pin, and described audio transmission end is by audio transmission line and described sound Keep pouring in defeated pin to connect；Described on-off circuit has signal connection end, switching device and identifies end, and described signal connection end divides Be not connected with the signal input part of described state output end and described switching device, described identification end respectively with described derailing switch The signal output part of part and described State-output pin connect.

Wherein in an embodiment, in the first operative state, described identification port is high level, wherein, and described One duty be described processor power on start state.

Wherein in an embodiment, in a second operative state, described identification port is low level, wherein, and described Two duties are that described processor is set up wireless connections with outside headset equipment and activates the state of speech.

Wherein in an embodiment, under the 3rd duty, described identification port is high level, wherein, and described Three duties are the state of outside headset equipment and described processor aborted.

Wherein in an embodiment, under the 4th duty, described identification port is low level, wherein, and described Four duties are laid equal stress on for outside headset equipment and described processor aborted and are connected successful state.

Wherein in an embodiment, described switching device includes triode.

Wherein in an embodiment, described triode is NPN type triode, and the base stage of described triode is described signal Input, the most described signal output part of current collection.

Wherein in an embodiment, described processor includes bluetooth master chip, and the base stage of described triode passes through resistance R Be connected and pass through resistance R2 ground connection with the State-output port of described bluetooth master chip, colelctor electrode is preset with described pin port Pin connects and connects supply voltage, grounded emitter by resistance R3.

The interphone Bluetooth adapter that above-mentioned automatic identification connects, processor is passed by UART serial data bus, audio frequency Defeated line and on-off circuit are connected with pin port, and pin port is connected with the attachment unit interface of transmitter receiver main frame, are processed as device root The output state of on-off circuit is controlled according to the connection with outside accessory device such as headset, so that outside attached The transmitter receiver main frame that part equipment is connected under different conditions with processor to ensure to be connected with the machine Bluetooth adapter of saying basic Call function, particularly solves when aborted occurs connecting in accessory device, maintains the basic call of transmitter receiver main frame The technical problem of function, understands this process simultaneously and need not change original transmitter receiver host circuit design of hardware and software, Ke Yishi Answer the various forms of attachment unit interface of any model.

Accompanying drawing explanation

Fig. 1 is the structural representation automatically identifying the interphone Bluetooth adapter connected in an embodiment；

Fig. 2 is the electrical block diagram automatically identifying the interphone Bluetooth adapter connected in an embodiment；

Fig. 3 is the structural representation of transmitter receiver；

Fig. 4 is the structural representation of traditional Bluetooth adapter；

Fig. 5 is the attachment structure signal automatically identifying interphone Bluetooth adapter and the transmitter receiver connected in an embodiment Figure；

Fig. 6 is at the identification control of the software firmware automatically identifying the interphone Bluetooth adapter connected in an embodiment Reason schematic flow sheet.

Detailed description of the invention

Understandable for enabling above-mentioned purpose of the present utility model, feature and advantage to become apparent from, below in conjunction with the accompanying drawings to this The detailed description of the invention of utility model is described in detail.Elaborate a lot of detail in the following description so that fully Understand this utility model.But this utility model can be implemented to be much different from alternate manner described here, this area Technical staff can do similar improvement in the case of this utility model intension, and therefore this utility model is not by following public affairs The restriction of the specific embodiment opened.

Referring to Fig. 1, it is the structural representation automatically identifying the interphone Bluetooth adapter 10 connected in an embodiment Figure, the interphone Bluetooth adapter 10 that a kind of automatic identification connects includes: processor 100, pin port 110 and on-off circuit 120。

Pin port 110 is used for connecting outside transmitter receiver.Pin port 110 have universal asynchronous receiving-transmitting transmission pin 111, State-output pin 112 and audio transmission pin 113.

Processor 100 has universal asynchronous receiving-transmitting transmission ends 101, state output end 102 and audio transmission end 103, logical It is connected with universal asynchronous receiving-transmitting transmission pin 111 by UART serial data bus 130 by asynchronous receiving-transmitting transmission ends 101, audio frequency Transmission ends 103 is connected with audio transmission pin 113 by audio transmission line 140.

On-off circuit 120 has signal connection end 121, switching device 122 and identifies end 123, signal connection end 121 points Be not connected with the signal input part 151 of state output end 102 and switching device 122, identify end 123 respectively with switching device Signal output part 152 and the State-output pin 112 of 122 connect.

The interphone Bluetooth adapter 10 that above-mentioned automatic identification connects, processor 100 is by UART serial data bus 130, audio transmission line 140 and on-off circuit 120 are connected with pin port 110, pin port 110 and the adnexa of transmitter receiver main frame Interface connects, and is processed as device 100 and controls on-off circuit 120 according to the connection with outside accessory device such as headset Output state, so that be connected under different conditions to ensure at outside accessory device and processor 100 and say that machine is blue The basic call function of the transmitter receiver main frame that tooth adapter 10 connects, particularly solves in connecting extremely occurs in accessory device Time disconnected, maintain the technical problem of the basic call function of transmitter receiver main frame, understand this process simultaneously and need not to change original Transmitter receiver host circuit design of hardware and software, is adapted to the various forms of attachment unit interface of any model.

For ease of understanding the operation principle automatically identifying the interphone Bluetooth adapter connected, Fig. 3 shows transmitter receiver Structural representation, the identification signal that this transmitter receiver host-processor is inputted by attachment unit interface judges, by CODEC two-way Mike The internal simulation switch switching of input and the internal simulation switch switching of two-way audio power amplifier passage, can select inside loudspeaker wheat Gram or external accessory loudspeaker Mike.

Traditional immersive simulation or digital handset are the most all withed a hook at the end attachment unit interface, by this Interface Expanding outside some Portion's equipment such as headset, hand-held microphone or by its communication interface connect miscellaneous equipment.The adnexa of tradition transmitter receiver is all passive discerning , the adnexa such as general headset or hand-held microphone is all the connection of analog voice and IO, and main frame is according to the identification end defined in attachment unit interface The connection status of mouth electrical level judging adnexa, this interface once recognizes the access of voice earphone adnexa, and transmitter receiver Host Shutdown is originally The inside loudspeaker of machine and internal Mike, switch to analog voice passage on adnexa external equipment.

The accessory devices such as traditional intercom headset hand-held microphone are all to use wired connection, sometimes emergency application onsite user Bring inconvenience.In order to break away from line, market occurs in that the Bluetooth adapter that some and various transmitter receivers coordinate in recent years, passes through adnexa Interface Expanding Bluetooth function, coordinates special Bluetooth headset or hand-held microphone, allow tradition transmitter receiver quick change Bluetooth function, it is achieved short The wireless speech of distance or data communication function extension.

Common Bluetooth adapter is all the recognition logic according to transmitter receiver main frame attachment unit interface, uses the side of passive discerning Corresponding for adaptor interface, method, identifies that input port is arranged to the stationary state that the device type of host definition is corresponding, in order to Allow transmitter receiver main frame identification type of attachment.

According to bluetooth general specification, usually bluetooth is set up to connect needs through inquiry, paging, scanning, and response etc. is several The interaction stage.

First main equipment according to inquiry (inquiry scan) to calculate from equipment physical address and comprise frequency hop sequences With the equipment access code (DAC) of claim frame, existed by page scan physical channel (page scan physical channel) Sending time slots initiates paging request；

From equipment with the fixing scan period (page scan iterval) at a regular time window (page Scan window) monitor the paging request of main equipment response with certain Hopping frequencies.

Main equipment receives and sends response after equipment response, calculates frequency hop sequences and clock according to the device address of oneself Phase information, receive the echo message of main equipment from equipment after, immediately accesses network (piconet) and enters connection status again Response is returned to main equipment.

Finally, by SDP, main equipment finds that service agreement inquiry is led to from the logic of equipment respective service in piconet nets Taoist monastic name, connects according to the secondary of this Path Setup application layer, connects including speech.Here it is the linker present principles of bluetooth.

If Bluetooth RF physical channel is blocked or headset causes from the unexpected power-off shutdown of equipment end or other reason When connecting unexpected aborted, the connecting link of Voice Applications layer is interrupted, and bluetooth speech channel disconnects automatically.But now intercommunication owner The simulated voice passage of machine stills remain on external path, and internal Mike and loudspeaker are all in closed mode, though transmitter receiver Calling initiated by main frame, also cannot send internal Mike's speech, and inside loudspeaker also cannot receive any calling speech, right in the short time Say that machine host cannot initiate calling by bluetooth is wireless, also cannot receive calling speech, cause word or short words.

General solution treating method is off drawing pin and saying the physical connection of machine host, main frame identification of adapter accessory Less than adnexa, then main frame could control switching, returns to inside loudspeaker and internal Mike；Or wait after reattempting to connection, The speech path of bluetooth accessory could be recovered.The process reconnected and time cannot be it is anticipated that connect whether success or failure is the most again Cannot determine, have a strong impact on Consumer's Experience, in emergency disposal is applied, possibly even delay important information.

Based on the above-mentioned principle to traditional transmitter receiver, Fig. 4 shows traditional Bluetooth adapter, adaptor interface attached Signal dead earth on part identification port.The knowledge of the corresponding ports that transmitter receiver host-processor MCU is inputted by attachment unit interface Level signal condition adjudgement, selects to switch interiorly or exteriorly speech channel.

Thus, in the present embodiment, it is proposed that the structure automatically identifying the interphone Bluetooth adapter connected as shown in Figure 1 Schematic diagram and combining the improvement being basically carried out at Bluetooth adapter traditional shown in Fig. 4 that Fig. 1 and Fig. 3 is drawn, As shown in Figure 5.Signal on the accessory identification port of adaptor interface is no longer fixed as ground state, but by increase One module, makes adapter processor can control output state.

In the present embodiment, pin port includes elastomeric joint.Adapter, from transmitter receiver main frame power taking source, uses simulated voice Interface, this programme is not related to concrete port and the power mode of its simulation input and output voice signal, and this part is not described in detail.

Describe for convenience, in this programme example use an adnexa pin port as accessory identification, actual can also It is other recognition method, the most multiple port combination, or different DC level Division identification.

Assuming that the port of certain model transmitter receiver type of attachment identification is Pin10, and define Pin10 high level for without adnexa Connect, Pin10 be low level be that adnexa connects effectively.Definition accessory identification port be Pin10 be an example, actual definition Any one port can be adjusted to as required, functional realiey is not affected.

When bluetooth connects accidental interruption, adapter obtains bluetooth wireless connection conditions in real time, it is assumed that be set as wireless connections Interrupt continuing to exceed certain time limit value set, or speech data LOF or error code exceed restriction threshold value and exceed certain and set Fixed time limit value, adapter actively changes connection status output, makes identification port status overturn, then transmitter receiver main frame is sentenced immediately Break to connect for adnexa and disconnect, speech path automatic switchback inside loudspeaker and internal Mike, keep the basic call function of main frame.

Bluetooth continues to attempt to reconnect, if reconnecting successfully, it is assumed that sets acquisition continuous speech Frame and exceedes certain time Or after error code drops within threshold value, speech switchback bluetooth again.

Referring to Fig. 2, it is automatically to identify in an embodiment that the circuit structure of the interphone Bluetooth adapter connected shows Being intended to, in the present embodiment, switching device includes triode Q1.Such as, triode is NPN type triode, and the base stage of triode is Signal input part, current collection extremely signal output part.Such as, processor includes bluetooth master chip BT, and the base stage of triode is by electricity Resistance R1 is connected and passes through the default pin of resistance R2 ground connection, colelctor electrode and pin port with the State-output port of bluetooth master chip Connect and connect supply voltage, grounded emitter by resistance R3.

In the present embodiment, as a example by the bluetooth main chip module circuit of CSR BC-05M, describe one and implement circuit, The PIO2 of bluetooth master chip BC-05M exports a switch-over control signal DISCNN, controls the on-off circuit in dotted line, makes output Identify the upset of port signal state.

In one embodiment, in the first operative state, identification port is high level, and wherein, the first duty is for processing Device 100 power on start state.

Concrete, after Bluetooth adapter connects the start that powers on, state output signal DISCNN makes identification port OPSEL2 shape State is defaulted as high level.

In one embodiment, in a second operative state, identification port is low level, and wherein, the second duty is for processing Device 100 is set up wireless connections with outside headset equipment and activates the state of speech.

Concrete, when transmitter receiver main frame attachment unit interface connects Bluetooth adapter, and recognize the foundation of Bluetooth headset adnexa even When connecing, the identification port status of adaptor interface is effective, the transmitter receiver host-processor identification port status by attachment unit interface, Controlling one group of variable connector and select Mike and the earphone horn of outside headset equipment, now to be just connected to transmitter receiver bluetooth attached for speech Part.

Such as, after Bluetooth adapter and headset equipment are set up wireless connections and activated speech, adapter changes connection shape State output DISCNN, making identification port OPSEL2 state is low level from high level upset.

In one embodiment, under the 3rd duty, identification port is high level, and wherein, the 3rd duty is outside Headset equipment and the state of processor 100 aborted.

Concrete, in the case of Bluetooth adapter and transmitter receiver main frame attachment unit interface keep physical connection, if bluetooth Wireless channel disconnecting, and suppose to be set as that wireless connections interrupt continuing to exceed certain time limit value set completely, or Person's speech data LOF or error code exceed and limit time of threshold value and exceed certain time limit value set, and adapter actively changes Identifying State-output, transmitter receiver main frame is judged as that adnexa connects and disconnects, speech path automatic switchback inside loudspeaker and internal wheat Gram.

Such as, when bluetooth connects accidental interruption, adapter processor monitors acquisition bluetooth wireless connection conditions in real time, it is assumed that It is set as that wireless connections interrupt limit value continuous time completely more than Toff=50ms, or speech data LOF or error code exceed When the time of restriction threshold value TH is more than Toff=50ms, adapter actively changes connection status output signal DISCNN, makes identification Port OPSEL2 state is high level from low level upset, then transmitter receiver main frame is judged as that adnexa connection has disconnected immediately, speech Path automatic switchback inside loudspeaker and internal Mike, keep the basic call function of main frame.

In one embodiment, under the 4th duty, identification port is low level, and wherein, the 4th duty is outside Headset equipment and processor 100 aborted are laid equal stress on and are connected successful state.

Concrete, adapter processor waits that bluetooth reconnects, if having recovered connection and speech reactivates successfully, it is assumed that Setting and obtain continuous speech Frame and drop to after within threshold value more than 100ms or error code, speech switchback Bluetooth control again speech leads to Road switches, and speech is reconnected in transmitter receiver bluetooth accessory, the Mike of Bluetooth headset equipment and earphone horn.

Such as, bluetooth continues to attempt to reconnect, if reconnecting successfully, it is assumed that set the time limit obtaining continuous speech Frame Value drops to after within threshold value TH more than Ton=300ms or error code, and adapter actively changes connection status output signal DISCNN, Making identification port OPSEL2 state is low level from high level upset, then transmitter receiver main frame is judged as Bluetooth adapter adnexa immediately Speech connection recovers, the Mike of the outside Bluetooth headset of speech switchback and earphone horn.

Referring to Fig. 3, after transmitter receiver main frame configuration Bluetooth adapter, there is several typical operation:

(1) normal mode

Not connecting adnexa, main frame IO1 and IO2 acquiescence MUXa and MUXb selects transmitting-receiving speech path AA1 and AA2, the most right Say the Mike MIC1 within machine host and loudspeaker SPK1 work.

(2) Conventional accessories pattern

When transmitter receiver main frame recognizes conventional earphone adnexa connection on adnexa, main frame is exported by IO1 and IO2, controls MUXa and MUXb selects transmitting-receiving speech path AB1 and AB2, and now, speech is just connected to transmitter receiver main frame attachment unit interface, outside normal Mike MIC2 and the external headphones loudspeaker SPK2 work of rule adnexa.

(3) Bluetooth adapter Attachment schema

After being mounted with Bluetooth adapter in transmitter receiver main frame attachment unit interface, power at Bluetooth adapter and start shooting and and bluetooth Before headset pairing successful connection, transmitter receiver main frame will not recognize any adnexa and connect, and now transmitter receiver main frame is still operated in Aforementioned normal mode (1).

Start shooting when the Bluetooth adapter installed in transmitter receiver main frame attachment unit interface powers on and connect with Bluetooth headset device pairing Being connected into merit, after voice-frequency channel activates automatically, transmitter receiver main frame can recognize the Bluetooth adapter in attachment unit interface, intercommunication at once Machine host processor is exported by IO1 and IO2, controls MUXa and MUXb and selects transmitting-receiving speech path AB1 and AB2, now, speech It is just connected to automatically identify the interphone Bluetooth adapter adnexa of connection, the Mike MIC3 of Bluetooth headset equipment and earphone horn SPK3 works.

When the Bluetooth adapter adnexa of connection transmitter receiver main frame is in opening, and set up pairing even with Bluetooth headset Connect and activate audio frequency, but by during because certain cause specific causes speech to interrupt time, transmitter receiver main frame recognizes Bluetooth adapter adnexa is in invalid " virtual connections " state, and transmitter receiver host-processor is exported by IO1 and IO2 immediately, control MUXa and MUXb processed selects transmitting-receiving speech path AA1 and AA2, now, the inside Mike of speech first switchback transmitter receiver main frame temporarily MIC1 and inside loudspeaker SPK1, keep the basic call function of transmitter receiver.

Successfully recover with speech if Bluetooth adapter and Bluetooth headset equipment reconnect, then transmitter receiver host-processor Being exported by IO1 and IO2, control MUXa and MUXb and select transmitting-receiving speech path AB1 and AB2, now, speech is reconnected in certainly The dynamic interphone Bluetooth adapter adnexa identifying connection, Mike MIC3 and the earphone horn SPK3 work of Bluetooth headset equipment.

For being further understood that the control flow automatically identifying the interphone Bluetooth adapter connected of the present embodiment, such as figure Shown in 6, it is the identification control process of the software firmware automatically identifying the interphone Bluetooth adapter connected in an embodiment Schematic flow sheet, automatically identifies that the state after the interphone Bluetooth adapter start connected is acquiescence identification state, now exports Signal DISCNN=0；Judge that pairing state is the most successful, enter when pairing time-out is the most unsuccessful, automatically identify the transmitter receiver connected Bluetooth adapter shuts down；When, after successful matching, bluetooth connects, activate audio frequency, actively change identification state, now output signal DISCNN=1；Disconnect if occurring connecting, then judge that connection break time, whether more than 50ms, actively changes when exceeding Identification state, now output signal DISCNN=0；Bluetooth attempts to reconnect, when bluetooth attempts to reconnect successfully and continues After 300ms, actively change identification state, now output signal DISCNN=1, otherwise, automatically identify the transmitter receiver bluetooth connected Adapter shuts down.

So, produce different output states by processor in Bluetooth adapter and control on-off circuit identification port State, under at conventional sense, processor is set up wireless connections with outside headset equipment and activates the state of speech, switch electricity Road keeps original low level, and when connecting aborted, in Bluetooth adapter, the state of processor output is by switch electricity originally The low level upset on road is high level, then transmitter receiver main frame is judged as that the external equipment connections such as headset hand-held microphone have disconnected immediately, words Sound path automatic switchback inside loudspeaker and internal Mike, when reconnecting successfully, the state of processor output is again by switch electricity originally Road reverts to low level, the Mike of the outside Bluetooth headset of speech switchback and earphone horn, so that call keeps the most unimpeded, and When there is aborted, main frame can keep basic call function.

The utility model has the advantage of: under conditions of not changing transmitter receiver host circuit design of hardware and software, use one Plant new circuit design of hardware and software, when external Bluetooth adapter adnexa physical connection, but also do not set with Bluetooth headset When wireless voice passage is set up in standby successful matching, or the wireless connections accidental interruption of Bluetooth adapter adnexa or when reconnecting, suitable Orchestration can actively change the identification Interface status output of self, allows transmitter receiver main frame can quickly recognize the different of adnexa connection Normal off is opened, and the switching speech path that makes an immediate response automatically returns to inside loudspeaker and internal Mike, keeps the most logical of transmitter receiver main frame Words function.This identifies and handoff procedure need not the order by any communication interfaces such as UART or SPI and state is mutual, no Need to change transmitter receiver host circuit design of hardware and software, be adapted to the various forms of attachment unit interface of any model.

Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, not to above-mentioned reality The all possible combination of each technical characteristic executed in example is all described, but, as long as the combination of these technical characteristics is not deposited In contradiction, all it is considered to be the scope that this specification is recorded.

Embodiment described above only have expressed several embodiments of the present utility model, and it describes more concrete and detailed, But therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that, for the common skill of this area For art personnel, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into Protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.

Claims (8)

1. the interphone Bluetooth adapter that an automatic identification connects, it is characterised in that including:

Pin port, described pin port is used for connecting outside transmitter receiver, and described pin port has universal asynchronous receiving-transmitting transmission Pin, State-output pin and audio transmission pin；

Processor, described processor has universal asynchronous receiving-transmitting transmission ends, state output end and audio transmission end, described general Asynchronous receiving-transmitting transmission ends is connected with described universal asynchronous receiving-transmitting transmission pin by UART serial data bus, described audio transmission End is connected with described audio transmission pin by audio transmission line；

On-off circuit, described on-off circuit has signal connection end, switching device and identifies end, and described signal connection end is respectively Be connected with the signal input part of described state output end and described switching device, described identification end respectively with described switching device Signal output part and described State-output pin connect.

The interphone Bluetooth adapter that automatic identification the most according to claim 1 connects, it is characterised in that in the first work Under state, described identification port is high level, wherein, described first duty be described processor power on start state.

The interphone Bluetooth adapter that automatic identification the most according to claim 1 connects, it is characterised in that in the second work Under state, described identification port is low level, and wherein, described second duty is that described processor is built with outside headset equipment Stand wireless connections and activate the state of speech.

The interphone Bluetooth adapter that automatic identification the most according to claim 1 connects, it is characterised in that in the 3rd work Under state, described identification port is high level, and wherein, described 3rd duty is that outside headset equipment is different with described processor The state often interrupted.

The interphone Bluetooth adapter that automatic identification the most according to claim 1 connects, it is characterised in that in the 4th work Under state, described identification port is low level, and wherein, described 4th duty is that outside headset equipment is different with described processor Often interrupt even successful state of laying equal stress on.

The interphone Bluetooth adapter that automatic identification the most according to claim 1 connects, it is characterised in that described derailing switch Part includes triode.

The interphone Bluetooth adapter that automatic identification the most according to claim 6 connects, it is characterised in that described triode For NPN type triode, the base stage of described triode is described signal input part, the most described signal output part of current collection.

The interphone Bluetooth adapter that automatic identification the most according to claim 7 connects, it is characterised in that described processor Including bluetooth master chip, the base stage of described triode is connected also with the State-output port of described bluetooth master chip by resistance R1 By resistance R2 ground connection, colelctor electrode is connected with the default pin of described pin port and connects supply voltage by resistance R3, sends out Emitter grounding.