CN110519672A - Communication system and method based on bluetooth headset and pedestal - Google Patents

Abstract

The communication system based on the bluetooth earphone and the base provided by the present invention, the base includes a processor and a base communication circuit electrically connected to each other, wherein the base communication circuit is provided with two base terminals; the bluetooth earphone includes a bluetooth chip and a bluetooth communication circuit electrically connected to each other circuit, wherein the bluetooth communication circuit is provided with two earphone terminals; when the bluetooth earphone is connected to the base, the two earphone terminals are respectively connected to the two base terminals; Charging or pulse communication with the Bluetooth headset; the Bluetooth communication circuit is used to communicate with the base communication circuit for charging or pulse communication with the base. The system adds a pulse communication function, which can directly communicate with the Bluetooth headset one-to-one. In terms of time, the pulse signal is less prone to overlap and confusion, and the communication is more reliable, which improves the communication reliability between the base and the Bluetooth headset, improves communication efficiency, and improves user experience.

Description

Communication system and method based on bluetooth headset and base

technical field

The invention belongs to the technical field of bluetooth earphones, and in particular relates to a communication system and method based on a bluetooth earphone and a base.

Background technique

Most of the mainstream Bluetooth headsets on the market today are true wireless TWS Bluetooth headsets. This type of Bluetooth headset often has a matching base. This base has the functions of storing Bluetooth headsets and charging Bluetooth headsets. As the technology of the Bluetooth headset industry matures, the functional design of the Bluetooth headset is also increasingly optimized, and the user's functional requirements for the base are not only satisfied with the charging and storage function, but hope that it will be more and more suitable for the Bluetooth headset function. The realization of the auxiliary function is more obvious. For example, it has functions such as sending pairing commands, resetting the headset, and obtaining headset information. However, the realization of this function requires the establishment of communication between the base and the Bluetooth headset for information exchange.

Some existing bases with communication functions on the market mainly exchange information through Bluetooth wireless broadcasting or establishing single-line communication with Bluetooth headsets. However, the information interaction method of Bluetooth wireless broadcasting has the defect of broadcast scanning conflict, which leads to the problem that the Bluetooth headset or base cannot obtain the other party's information in time or obtain information confusion. The single-wire communication method is an optimized scheme of the Bluetooth wireless broadcast communication method, which can directly realize one-to-one communication operation between the base and the Bluetooth headset. The base acts as the host, actively opens the communication after receiving an external operation, and switches the state to charge the headset after the communication times out or waves. However, the communication method of single-line communication is to rely on one signal line to complete two-way communication. The relationship between the master and the slave is stipulated in the communication mechanism, and the command code corresponding to the master and slave is determined, and the master initiates a communication request. Read slave communication data. Specifically, each communication is first sent by the host computer, and then receives the signal after a specified time. Although this kind of communication improves the reliability of the communication between the base and the Bluetooth headset, the communication speed is slow, because there is enough delay to wait for the master-slave port to switch between reading and writing, which is a waste of time and greatly affects the user experience. Therefore, how to realize reliable and efficient communication between the base and the Bluetooth headset and improve user experience is an urgent problem to be solved in the current Bluetooth headset technology.

Contents of the invention

Aiming at the defects in the prior art, the present invention provides a communication system and method based on a Bluetooth headset and a base, which improves the reliability and efficiency of communication and improves user experience.

In the first aspect, a communication system based on a Bluetooth headset and a base,

The base includes a processor and a base communication circuit electrically connected to each other, wherein the base communication circuit is provided with two base terminals; the Bluetooth headset includes a Bluetooth chip and a Bluetooth communication circuit electrically connected to each other, wherein the Bluetooth communication There are two earphone terminals on the circuit;

When the Bluetooth headset is connected to the base, the two earphone terminals are respectively connected to the two base terminals;

The base communication circuit is used to perform charging or pulse communication with the Bluetooth headset when receiving a switching instruction from the processor; the Bluetooth communication circuit is used to communicate with the base communication circuit to perform charging or pulse communication with the base .

Preferably, the base communication circuit includes a field effect transistor Q1, a triode Q2 and a triode Q3;

The 5V output signal of the processor is connected to the source of the field effect transistor Q1, the gate of the field effect transistor Q1 is connected to the source of the field effect transistor Q1 through the resistor R1, and the gate of the field effect transistor Q1 is also connected to the collector of the transistor Q3 , the emitter of transistor Q3 is grounded, the base of transistor Q3 is connected to the left ear control output terminal of the processor through resistor R7; the drain of field effect transistor Q1 is connected to the base of transistor Q2 through resistor R3, and the drain of field effect transistor Q1 The pole is also connected to the serial port receiving port of the processor by serially connecting resistors R8 and R9 in series, the intermediate node of the resistor R8 and the resistor R9 is also connected to the serial port sending port of the processor through the resistor R10, and the intermediate node of the resistor R8 and the resistor R3 is connected to the serial port of the processor through the capacitor C3 is connected to the middle node of resistor R8 and resistor R9;

The emitter of transistor Q2 is connected to the output port of the processor, the base of transistor Q2 is also connected to the emitter of transistor Q2 through resistor R4 and capacitor C2, and the collector of transistor Q2 is grounded through resistor R2; the collector of transistor Q2 is connected to to the input port of the processor;

The intermediate node between resistor R8 and capacitor C3 is output as a base terminal; the current detection output terminal of the processor outputs another base terminal through resistor R5, and the intermediate node between the current detection output terminal of the processor and resistor R5 is grounded through capacitor C1, and resistor R5 The intermediate node between the resistor R6 and the base terminal is grounded through the resistor R6, and the intermediate node between the resistor R6 and the base terminal is connected to the base output negative pole of the processor.

Preferably, the Bluetooth communication circuit includes a field effect transistor Q6 and a triode Q7;

The earphone terminal is grounded;

The other earphone terminal is connected to the source of the FET Q6, the earphone terminal is also connected to the power supply of the Bluetooth chip, the earphone terminal is also grounded through the resistor R11, and the earphone terminal is also connected to the charging control port of the Bluetooth chip through the resistor R12. Also connected to the input port of the Bluetooth chip through the resistor R16, the earphone terminal is also connected to the serial port sending port of the Bluetooth chip through the serial connection of the capacitor C11 and the resistor R13 in sequence, and the earphone terminal is also connected to the serial port receiving port of the Bluetooth chip through the serial connection of the resistor R15 and the resistor R14 in sequence , the middle node of the capacitor C11 and the resistor R13 is connected to the middle node of the resistor R15 and the resistor R14, the headphone terminal is also connected to the collector of the transistor Q7 through the resistor R17, the emitter of the transistor Q7 is grounded, and the gate of the field effect transistor Q6 is connected to the transistor Q7 The collector of the field effect transistor Q6 is connected to the charging terminal power supply of the Bluetooth chip, and the base of the triode Q7 is connected to the charging control port of the Bluetooth chip through the resistor R18.

In the second aspect, a communication method based on the Bluetooth earphone and the base, running on the processor of the base in the system described in the first aspect, includes the following steps:

When the charging command is received, the charging command is converted into a pulse signal and sent to the Bluetooth headset, and the Bluetooth headset electrically connected to the terminal of the headset and the terminal of the base is charged;

When the pulse communication start command is received, the pulse communication start command is converted into a pulse signal and sent to the Bluetooth headset;

When the communication data is received, the communication data is converted into a pulse signal and sent to the Bluetooth headset;

When receiving the pulse communication closing command, converting the pulse communication closing command into a pulse signal and sending it to the Bluetooth headset;

In the pulse signals corresponding to the charging command, the pulse communication start command and the pulse communication close command, the number and width of pulses are different.

Preferably, when the pulse communication start command is received, converting the pulse communication start command into a pulse signal and sending it to the Bluetooth headset specifically includes:

When it is detected that the state of the base is an idle state, waiting to receive the pulse communication start command, setting the state of the base as the sending state;

When it is detected that the state of the base is the sending state, the pulse communication start command is processed, the pulse communication start command is converted into a pulse signal and sent to the Bluetooth headset, and the state of the base is set as the receiving state.

Preferably, when the communication data is received, converting the communication data into a pulse signal and sending it to the Bluetooth headset specifically includes:

When it is detected that the state of the base is in the receiving state, waiting to receive the communication data, converting the received communication data into a pulse signal and sending it to the Bluetooth headset;

When it is detected that the communication data has been received or received overtime, the state of the base is set as the completed state;

When it is detected that the state of the base is completed, it waits to receive a new instruction.

Preferably, when the base is charging the Bluetooth headset, when a reset signal is received, the reset signal is converted into a pulse signal and sent to the Bluetooth headset to reset the Bluetooth headset.

Preferably, when the pulse signal is not received from the Bluetooth headset within a preset time after the pulse signal is sent to the Bluetooth headset, the pulse signal is resent.

In the third aspect, a communication method based on the Bluetooth headset and the base, running on the Bluetooth chip of the Bluetooth headset in the system described in the first aspect, includes the following steps:

When the pulse signal is received as a charging command, set the state of the Bluetooth headset to the charging state, and complete the charging with the base; during the charging process, when it is detected that the charge is full, set the state of the Bluetooth headset to the standby state;

When the pulse signal is received as a pulse communication start command, waiting to receive the communication data;

When the pulse signal is received as the command to close the pulse communication, set the state of the Bluetooth headset to the charging state, and complete the charging with the base;

When the communication data is received or received overtime, set the state of the Bluetooth headset to the charging state, and complete the charging with the base;

In the pulse signals corresponding to the charging command, the pulse communication start command and the pulse communication close command, the number and width of pulses are different.

Preferably, when a pulse signal from the base is received, a response signal is generated and sent to the base.

It can be seen from the above technical solution that the communication system and method based on the Bluetooth headset and the base provided by the present invention adds a pulse communication function, and can realize the one-to-one communication function between the base and the Bluetooth headset. In terms of time, the pulse signal is not easy to overlap and confusion, and the communication is more reliable. The base acts as the host, actively starts the communication after receiving external instructions, and sends different pulse signals to the Bluetooth headset for information interaction, which is short-term efficient and improves the base and Bluetooth headset. Communication reliability, improve communication efficiency, and enhance user experience.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the specific embodiments or the prior art. Throughout the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, elements or parts are not necessarily drawn in actual scale.

FIG. 1 is a block diagram of the communication system provided by the first embodiment.

FIG. 2 is a circuit diagram of the base communication circuit provided by the first embodiment.

FIG. 3 is a circuit diagram of the Bluetooth communication circuit provided by the first embodiment.

Detailed ways

Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only examples, rather than limiting the protection scope of the present invention. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and/or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and/or collections thereof.

It should also be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural referents unless the context clearly dictates otherwise.

As used in this specification and the appended claims, the term "if" may be construed as "when" or "once" or "in response to determining" or "in response to detecting" depending on the context . Similarly, the phrase "if determined" or "if [the described condition or event] is detected" may be construed, depending on the context, to mean "once determined" or "in response to the determination" or "once detected [the described condition or event] ]” or “in response to detection of [described condition or event]”.

Embodiment one:

A communication system based on a Bluetooth headset and a base, see Figure 1,

The base includes a processor and a base communication circuit electrically connected to each other, wherein the base communication circuit is provided with two base terminals; the Bluetooth headset includes a Bluetooth chip and a Bluetooth communication circuit electrically connected to each other, wherein the Bluetooth communication There are two earphone terminals on the circuit;

When the Bluetooth headset is connected to the base, the two earphone terminals are respectively connected to the two base terminals;

The base communication circuit is used to perform charging or pulse communication with the Bluetooth headset when receiving a switching instruction from the processor; the Bluetooth communication circuit is used to communicate with the base communication circuit to perform charging or pulse communication with the base .

Specifically, the communication system utilizes the charging pins of the base and the Bluetooth headset, and when the charging pins (that is, the base terminal and the earphone terminal) are not charging, the message is transmitted through pulse signals of different numbers and widths. Its communication mechanism can be set as follows: In the communication mode, the communication is always initiated by the base. After the base sends a command, the Bluetooth headset must send a response within 100ms. If the base does not receive a response signal within 100ms, it will resend. The number of resends is up to the user set up. The receiving timeout setting is: the duration of a single pulse signal transmission does not exceed 1s, and if it exceeds, the signal will be abnormal.

The communication system adds a pulse communication function, which can realize the one-to-one communication function between the base and the Bluetooth headset. In terms of time, the pulse signal is not easy to overlap and confusion, and the communication is more reliable. The base acts as the host, actively starts the communication after receiving external instructions, and sends different pulse signals to the Bluetooth headset for information interaction, which is short-term efficient and improves the base and Bluetooth headset. Communication reliability, improve communication efficiency, and enhance user experience.

Referring to FIG. 2, the base communication circuit includes a field effect transistor Q1, a triode Q2 and a triode Q3;

The 5V output signal of the processor (represented by 5V in the figure) is connected to the source of the field effect transistor Q1, the gate of the field effect transistor Q1 is connected to the source of the field effect transistor Q1 through the resistor R1, and the gate of the field effect transistor Q1 is connected to the source of the field effect transistor Q1. It is also connected to the collector of the transistor Q3, the emitter of the transistor Q3 is grounded, the base of the transistor Q3 is connected to the left ear control output terminal of the processor through the resistor R7 (indicated by CTRL_OUT_L in the figure); the drain of the field effect transistor Q1 is connected through the resistor R3 is connected to the base of the transistor Q2, and the drain of the field effect transistor Q1 is also connected to the serial port receiving port of the processor through series connection of resistors R8 and R9 in sequence (indicated by BASE_RX_L in the figure), and the intermediate node of the resistor R8 and the resistor R9 is also passed through Resistor R10 is connected to the serial port sending port of the processor (indicated by BASE_TX_L in the figure), and the intermediate node of resistor R8 and resistor R3 is connected to the intermediate node of resistor R8 and resistor R9 through capacitor C3;

The emitter of the transistor Q2 is connected to the output port of the processor (indicated by CTRL_DET_OUT in the figure), the base of the transistor Q2 is connected to the emitter of the transistor Q2 through the resistor R4 and the capacitor C2 respectively, and the collector of the transistor Q2 is grounded through the resistor R2 ; The collector of the triode Q2 is connected to the input port of the processor (indicated by DET_OUT_L in the figure);

The intermediate node between the resistor R8 and the capacitor C3 is output as a base terminal; the current detection output terminal of the processor (indicated by CUR_OUT in the figure) outputs another base terminal through the resistor R5, and the intermediate node between the current detection output terminal of the processor and the resistor R5 The capacitor C1 is grounded, the middle node between the resistor R5 and the base terminal is grounded through the resistor R6, and the middle node between the resistor R6 and the base terminal is connected to the base output negative pole of the processor (indicated by a in the figure).

Specifically, the field effect transistor Q1 is used to realize the switch between charging and pulse communication of the base. After the base is boosted, it will output 5V voltage through the 5V output port. R8 is used to limit the reverse flow current of the serial port. To speed up the level change, the transistor Q2 is used for load detection. When the base turns on the field effect transistor Q1, it turns on the boost to charge the Bluetooth headset, and then detects the charging current of the Bluetooth headset. If the current is low and lasts for 10s, the Bluetooth headset is considered fully charged. When the FET Q1 is turned on, the load detection will be invalid. At this time, the charging current of the Bluetooth headset is used to judge whether the Bluetooth headset is fully charged.

The base closes the field effect transistor Q1, CTRL_DET_OUT outputs a high level (that is, the pulse communication start command), and the pulse communication can be started. At this time, the load detection is valid. When a Bluetooth headset is connected, the DET_OUT_L port detects a high level, and there is no Bluetooth When the earphone is connected, the DET_OUT_L port is low level.

Referring to Fig. 3, the bluetooth communication circuit includes a field effect transistor Q6 and a triode Q7;

The earphone terminal is grounded;

The other earphone terminal is connected to the source of the FET Q6, the earphone terminal is also connected to the power supply of the Bluetooth chip (indicated by VBUS in the figure), the earphone terminal is also grounded through the resistor R11, and the earphone terminal is also connected to the Bluetooth chip through the resistor R12. The charging control port (indicated by CHARG_CTRL in the figure), the earphone terminal is also connected to the input port of the Bluetooth chip through the resistor R16 (indicated by DET in the figure), and the earphone terminal is also connected to the serial port of the Bluetooth chip through the series connection of capacitor C11 and resistor R13. port (represented by EAR_TX in the figure), the headphone terminal is also connected to the serial port receiving port of the Bluetooth chip (represented by EAR_RX in the figure) through serial connection of resistor R15 and resistor R14 in sequence, and the intermediate node between capacitor C11 and resistor R13 is connected to resistor R15 and resistor R14 The earphone terminal is also connected to the collector of the transistor Q7 through the resistor R17, the emitter of the transistor Q7 is grounded, the gate of the field effect transistor Q6 is connected to the collector of the transistor Q7, and the drain of the field effect transistor Q6 is connected to the bluetooth chip. The power supply of the charging terminal (indicated by VCHGER in the figure), the base of the transistor Q7 is connected to the charging control port of the Bluetooth chip through the resistor R18.

Specifically, the field effect transistor Q6 is used to realize the switching between charging and communication of the Bluetooth headset. In the charging state, the CHARG_CTRL port of the Bluetooth chip outputs a high level (forcibly turn on charging when the Bluetooth headset is turned on), and the input is suspended (when the Bluetooth headset is turned on). The charging is turned on by default in the shutdown state), and the output is low level (turn on the field effect transistor Q6, and the charging is forcibly turned off in the Bluetooth headset communication state, and the communication is turned on).

DET is the headphone reset signal detection pin. When the input is floating (pull-down through the resistor R16), it detects the rising edge of the charging pin of the Bluetooth headset. When two consecutive rising edges are measured, the time is 100ms (the detection accuracy is required to be 10%) When , the pulse is considered valid and the number of pulses is increased by 1. Assuming that the reset signal is 5 valid pulses, when the Bluetooth headset receives 5 valid pulses within 1s, it is confirmed that the received command is a reset signal, and the Bluetooth communication circuit outputs a 100ms high-level pulse to reset the Bluetooth headset. The Bluetooth headset does not receive the DET signal within 1s after reset, and can continue to receive the DET signal and perform the reset operation after 1s.

Embodiment two:

A communication method based on a Bluetooth headset and a base, running on the processor of the base in the system described in Embodiment 1, comprising the following steps:

S1: When a charging command is received, convert the charging command into a pulse signal and send it to the Bluetooth headset to charge the Bluetooth headset whose terminal is electrically connected to the terminal of the base;

S2: When the pulse communication start command is received, convert the pulse communication start command into a pulse signal and send it to the Bluetooth headset;

Specifically, the switch in the base to charge or pulse communication with the Bluetooth headset can be realized by changing the state of the switch cover of the base. For example, when it is detected that the base switch cover is opened, it is considered to have received a pulse communication start command, and at this time, the status query can be performed according to the command input by the user.

S3: When the communication data is received, convert the communication data into a pulse signal and send it to the Bluetooth headset;

S4: When receiving the pulse communication closing command, convert the pulse communication closing command into a pulse signal and send it to the Bluetooth headset;

Specifically, if the base detects that the cover is closed when the switch cover is open, that is, it receives the pulse communication closing command, it starts counting, and if it detects that the light switching cover is open again within 1s of receiving the pulse communication closing command, the timing is reset. , ignore the closing action of the previous switch cover, switch the base to the open state, and switch to the communication state. Otherwise, the base will switch to the closed cover state after 1 second, and the base will return to the charging state for charging the Bluetooth headset.

In the pulse signals corresponding to the charging command, the pulse communication start command and the pulse communication close command, the number and width of pulses are different.

The communication system adds a pulse communication function, which can directly communicate with the Bluetooth headset one-to-one. In terms of time, the pulse signal is not easy to overlap and confusion, and the communication is more reliable. The base acts as the host, actively starts the communication after receiving external instructions, and sends different pulse signals to the Bluetooth headset for information interaction, which is short-term efficient and improves the base and Bluetooth headset. Communication reliability, improve communication efficiency, and enhance user experience.

Preferably, when the pulse communication start command is received, converting the pulse communication start command into a pulse signal and sending it to the Bluetooth headset specifically includes:

When it is detected that the state of the base is an idle state, waiting to receive the pulse communication start command, setting the state of the base as the sending state;

When it is detected that the state of the base is the sending state, the pulse communication start command is processed, the pulse communication start command is converted into a pulse signal and sent to the Bluetooth headset, and the state of the base is set as the receiving state.

Preferably, when the communication data is received, converting the communication data into a pulse signal and sending it to the Bluetooth headset specifically includes:

When it is detected that the state of the base is in the receiving state, waiting to receive the communication data, converting the received communication data into a pulse signal and sending it to the Bluetooth headset;

When it is detected that the communication data has been received or received overtime, the state of the base is set as the completed state;

When it is detected that the state of the base is completed, it waits to receive a new instruction.

In terms of the communication method between the Bluetooth headset and the base, the communication method sets pulse signals of different numbers and widths to distinguish different external commands, formulates the above communication mechanism, and uses the charging pin of the base and the Bluetooth headset for pulse communication when not charging. , low power consumption, no need to make other changes in hardware, simple and easy to use.

In terms of transmission efficiency, the duration of a single pulse in pulse communication ranges from 0.2-100ms, which is very short. Therefore, compared with the existing single-wire communication, the communication speed is greatly improved and the transmission efficiency is high.

In terms of communication stability, there is no misjudgment between pulse signals, and pulse signals are less subject to external interference, less jitter, high isolation, long-term continuous and stable work, and more stable and reliable communication.

In terms of function switching, because the main function of the base is to charge the Bluetooth headset, the realization of the communication function must not affect the use of the charging function. Therefore, this method sets the switch between charging and communication of the base, and uses the base as the host. After receiving an external command, it actively sends a pulse signal to the Bluetooth headset to start communication, and continues to charge the Bluetooth headset after the communication times out or waves. The base switches the state through the state of the switch cover, and the Bluetooth headset also enters the corresponding state by entering and exiting the bin. The two cooperate to complete the charging and communication operations, and the probability of false triggering is greatly reduced.

The method is simple in operation and low in cost, can effectively complete predetermined functions, reduce unnecessary operations, greatly improve the use effect of the bluetooth earphone, and meet the application requirements.

Preferably, when the base is charging the Bluetooth headset, when a reset signal is received, the reset signal is converted into a pulse signal and sent to the Bluetooth headset to reset the Bluetooth headset.

Specifically, during the charging process of the Bluetooth headset, the base sends a pulse signal corresponding to the reset signal to the Bluetooth headset after charging for 10 seconds to reset the Bluetooth headset.

When resetting the Bluetooth headset, the base acts as the host. When receiving the reset signal, it converts to a pulse signal (5 square wave pulse signals of 100ms within 1s). If the Bluetooth headset receives 5 valid pulses within 1s, it is confirmed. The command corresponding to the received signal is a reset signal, and then the base outputs a 100ms high-level pulse to the Bluetooth headset to reset the Bluetooth headset. The Bluetooth headset does not receive the DET signal within 1s of reset, and continues to receive the DET signal after 1s.

Preferably, when the pulse signal is not received from the Bluetooth headset within a preset time after the pulse signal is sent to the Bluetooth headset, the pulse signal is resent.

Specifically, if the response times out, it means that the Bluetooth headset may not have received the pulse signal, or the response signal is interfered, etc. At this time, the base needs to resend the pulse signal to request the Bluetooth headset to process again.

The methods provided in the embodiments of the present invention are for brief description, and for the parts not mentioned in the embodiments, reference may be made to the corresponding content in the foregoing method embodiments.

Embodiment three:

A communication method based on a bluetooth earphone and a base, running on the bluetooth chip of the bluetooth earphone in the system described in the first embodiment, comprising the following steps:

S11: When the pulse signal is received as a charging command, set the state of the Bluetooth headset to the charging state, and complete the charging with the base; during the charging process, when it is detected that the charge is full, set the state of the Bluetooth headset to the standby state ;

S12: Waiting to receive the communication data when the pulse signal is received as a pulse communication start instruction;

S13: When the pulse signal is received as a command to close the pulse communication, set the state of the Bluetooth headset to the charging state, and complete the charging with the base;

S14: When the communication data is received or received overtime, set the state of the Bluetooth headset to the charging state, and complete the charging with the base;

In the pulse signals corresponding to the charging command, the pulse communication start command and the pulse communication close command, the number and width of pulses are different.

Specifically, when the following two situations exist, the Bluetooth headset switches to the communication state: 1. The Bluetooth headset is in the storage state (that is, when the Bluetooth headset is connected to the base) or charging, and when the pulse communication start command is detected, the pulse communication is turned on. Communication, waiting for the base signal. 2. When the Bluetooth headset is out of the warehouse (that is, when the Bluetooth headset is not connected to the base), it detects the action of entering the warehouse, turns off the charging MOS, turns on the pulse communication, and waits for the signal from the base. When the following three situations exist, the Bluetooth headset switches to the charging state: 1. The Bluetooth headset is in the communication state, receives the pulse communication shutdown command, turns on the charging MOS, and switches to the charging state. 2. The Bluetooth headset is in the communication state, and the serial port signal is not received for a long time (2s), it is considered that the communication has timed out, and the charging MOS is turned on to switch to the charging state. 3. When the Bluetooth headset is in any state, it detects the out-of-warehouse state, turns on the charging MOS and switches to the charging state.

During the pulse communication, the base acts as the host and actively starts the communication after receiving an external operation. The Bluetooth headset detects the pulse signal corresponding to the pulse communication start command on the charging pin and then starts the communication. The pulse signal corresponding to the pulse communication start command is a high frequency of 100Khz Pulse signal, the single transmission duration of this signal does not exceed 10ms, and the Bluetooth headset is charged after the communication timeout or the pulse signal corresponding to the pulse communication closing command is detected.

As shown in Figure 2, after the charging pin at the base end sends the pulse signal corresponding to the pulse communication start command, the pulse signal detection pin of the Bluetooth headset is DET, which detects the rising edge of the level on the charging pin of the Bluetooth headset, and detects the rising edge signal after the rising edge , when the detection pin detects a 100KHz high-frequency pulse signal, the pulse signal corresponding to the pulse communication start command starts the communication.

After the communication is turned on, the base and the Bluetooth headset rely on the formulated pulse signal to communicate. Set different numbers of pulses with different widths to distinguish external commands. Different pulse signals correspond to different functional requirements, which can be set according to product needs.

Preferably, when a pulse signal from the base is received, a response signal is generated and sent to the base.

The methods provided in the embodiments of the present invention are for brief description, and for the parts not mentioned in the embodiments, reference may be made to the corresponding content in the foregoing method embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. All of them should be covered by the scope of the claims and description of the present invention.

Claims (10)

1. a kind of communication system based on bluetooth headset and pedestal, which is characterized in that

The pedestal includes the processor being electrically connected to each other and pedestal telecommunication circuit, wherein the pedestal telecommunication circuit is equipped with two A pedestal terminal；The bluetooth headset includes the Bluetooth chip being electrically connected to each other and bluetooth communication circuit, wherein the bluetooth is logical Earphone terminal there are two being set on letter circuit；

When the bluetooth headset access pedestal, described two earphone terminals are connect with two pedestal terminals respectively；

When the pedestal telecommunication circuit is used to receive the switching command of processor, carries out charging or pulse with bluetooth headset and lead to Letter；The bluetooth communication circuit carries out the charging or pulse communication with pedestal for being communicated with the pedestal telecommunication circuit.

2. the communication system based on bluetooth headset and pedestal according to claim 1, which is characterized in that

The pedestal telecommunication circuit includes field-effect tube Q1, triode Q2 and triode Q3；

The 5V output signal of the processor connects the source electrode of field-effect tube Q1, and the grid of field-effect tube Q1 connects field effect by resistance R1 Should pipe Q1 source electrode, the grid of field-effect tube Q1 also connects the collector of triode Q3, the emitter ground connection of triode Q3, triode The base stage of Q3 is connected to the left ear control output end of processor by resistance R7；The drain electrode of field-effect tube Q1 connects three poles by resistance R3 The base stage of pipe Q2, the drain electrode of field-effect tube Q1 also by being sequentially connected in series resistance R8, resistance R9 be connected to the serial ports receiving port of processor, The intermediate node of resistance R8 and resistance R9, which also pass through resistance R10 and is connected to the serial ports of processor, sends mouth, resistance R8 and resistance R3's Intermediate node is connected to the intermediate node of resistance R8 and resistance R9 by capacitor C3；

The emitter of triode Q2 is connected to the delivery outlet of processor, and the base stage of triode Q2 also passes through resistance R4 and capacitor C2 respectively It is connected to the emitter of triode Q2, the collector of triode Q2 is grounded by resistance R2；The collector of triode Q2 is connected to place Manage the input port of device；

The intermediate node of resistance R8 and capacitor C3 are exported as a pedestal terminal；The current detecting output end of processor passes through resistance R5 exports another pedestal terminal, and the current detecting output end of processor and the intermediate node of resistance R5 are grounded by capacitor C1, electricity The intermediate node of resistance R5 and pedestal terminal is grounded by resistance R6, and the intermediate node of resistance R6 and pedestal terminal is connected to processor Pedestal output negative pole.

3. the communication system based on bluetooth headset and pedestal according to claim 2, which is characterized in that

The bluetooth communication circuit includes field-effect tube Q6 and triode Q7；

The one earphone terminal ground connection；

Another earphone terminal connects the source electrode of field-effect tube Q6, which also connects the power supply of Bluetooth chip, and the earphone terminal is also It is grounded by resistance R11, which also passes through the re-charge control port that resistance R12 connects Bluetooth chip, and the earphone terminal is also The input port of Bluetooth chip is connect by resistance R16, the earphone terminal also by being sequentially connected in series capacitor C11, resistance R13 connects bluetooth core The serial ports of piece sends mouth, the earphone terminal also by being sequentially connected in series resistance R15, resistance R14 connect the serial ports receiving port of Bluetooth chip, The intermediate node of the intermediate node connecting resistance R15 and resistance R14 of capacitor C11 and resistance R13, the earphone terminal also pass through resistance R17 connects the collector of triode Q7, the emitter ground connection of triode Q7, and the grid of field-effect tube Q6 connects the current collection of triode Q7 Pole, the drain electrode of field-effect tube Q6 connect the charging end power supply of Bluetooth chip, and the base stage of triode Q7 connects Bluetooth chip by resistance R18 Re-charge control port.

4. a kind of means of communication based on bluetooth headset and pedestal, which is characterized in that any system indsole in claim 1-3 It is run on the processor of seat, comprising the following steps:

When receiving charging instruction, the charging instruction is converted into pulse signal and is sent to bluetooth headset, gives earphone terminal The bluetooth headset being electrically connected with pedestal terminal charges；

When receiving pulse communication enabled instruction, the pulse communication enabled instruction is converted into pulse signal and is sent to bluetooth Earphone；

When receiving communication data, the communication data is converted into pulse signal and is sent to bluetooth headset；

When receiving pulse communication out code, the pulse communication out code is converted into pulse signal and is sent to bluetooth Earphone；

In the charging instruction, pulse communication enabled instruction and the corresponding pulse signal of pulse communication out code, number of pulses With it is of different size.

5. the means of communication based on bluetooth headset and pedestal according to claim 4, which is characterized in that

It is described to receive pulse communication enabled instruction, the pulse communication enabled instruction is converted into pulse signal and is sent to indigo plant Tooth earphone specifically includes:

When the state for detecting pedestal is idle state, the pulse communication enabled instruction to be received is waited, the shape of pedestal is set State is transmission state；

When the state for detecting the pedestal is transmission state, the pulse communication enabled instruction is handled, the pulse is led to Letter enabled instruction is converted to pulse signal and is sent to bluetooth headset, and the state that pedestal is arranged is reception state.

6. the means of communication based on bluetooth headset and pedestal according to claim 5, which is characterized in that

It is described when receiving communication data, the communication data be converted into pulse signal be sent to bluetooth headset and specifically wrap It includes:

When the state for detecting the pedestal is reception state, the communication data to be received is waited, it is described logical by what is received News data are converted to pulse signal and are sent to bluetooth headset；

After detecting that the communication data receives or receive time-out, the state that pedestal is arranged is completion status；

When the state for detecting the pedestal is completion status, new instruction to be received is waited.

7. the means of communication based on bluetooth headset and pedestal according to claim 4, which is characterized in that

It carries out when it receives the reset signal it, the reset signal being converted to arteries and veins in charging process to bluetooth headset in pedestal It rushes signal and is sent to bluetooth headset, bluetooth headset is resetted.

8. the means of communication based on bluetooth headset and pedestal according to claim 4, which is characterized in that

After sending pulse signal to bluetooth headset, the response letter from bluetooth headset is not received by within the preset time Number when, retransmit the pulse signal.

9. a kind of means of communication based on bluetooth headset and pedestal, which is characterized in that blue in any system in claim 1-3 It is run on the Bluetooth chip of tooth earphone, comprising the following steps:

When receiving pulse signal is charging instruction, the state that bluetooth headset is arranged is charged state, is completed between pedestal Charging；During the charging process, when detecting that charging has been expired, the state that bluetooth headset is arranged is standby mode；

When receiving pulse signal is pulse communication enabled instruction, the communication data to be received is waited；

When receive pulse signal be pulse communication out code when, be arranged bluetooth headset state be charged state, complete with Charging between pedestal；

After the communication data receives or receive time-out, the state that bluetooth headset is arranged is charged state, completion and bottom Charging between seat；

In the charging instruction, pulse communication enabled instruction and the corresponding pulse signal of pulse communication out code, number of pulses With it is of different size.

10. the means of communication based on bluetooth headset and pedestal according to claim 9, which is characterized in that

When receiving the pulse signal from pedestal, generates answer signal and be sent to pedestal.