Bluetooth communication frequency writing circuit and frequency writing line thereof

Abstract

The utility model relates to the technical field of interphone frequency writing, in particular to a Bluetooth communication frequency writing circuit and a frequency writing line thereof. A Bluetooth communication frequency writing circuit comprises a Bluetooth main control chip, a Bluetooth signal receiving and transmitting module and a power supply module, the RF end of the Bluetooth main control chip is connected with the Bluetooth signal receiving and transmitting module, the power supply end of the Bluetooth main control chip is connected with the power supply module, and the serial port end of the Bluetooth main control chip is connected with a UART (Universal Asynchronous Receiver / Transmitter) interface. According to the utility model, the Bluetooth master control chip and the Bluetooth signal transceiver module are arranged in the frequency writing chip box of the frequency writing line and are used for realizing a Bluetooth communication frequency writing function, meanwhile, the USB interface is arranged to be connected with a mobile phone end or a computer end, and power is directly taken from the USB interface end after connection, so that power is provided for the operation of the chip in the frequency writing chip box, and the frequency writing function is realized. Compared with a conventional mode that a battery is arranged in a frequency writing chip box for power supply, the frequency writing chip box optimizes the battery, and the overall size of the frequency writing line is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of walkie-talkie programming technology, and in particular to a Bluetooth communication programming circuit and its programming cable. Background Technology

[0002] A programming cable is a dedicated cable that connects a computer and a walkie-talkie to allow for frequency settings and modifications via the computer. It typically has a USB port and a UART port compatible with the walkie-talkie's headphone jack. When using a programming cable, corresponding programming software is required. Through the software, frequency data can be transferred from the computer to the walkie-talkie, enabling adjustments to the walkie-talkie's frequency and other settings.

[0003] In existing technologies, programming cables that connect USB and UART interfaces typically include a battery in the programming chip housing to provide continuous power for programming. However, this often results in a large overall size of the programming cable, making it inconvenient to carry. Meanwhile, Bluetooth communication technology is widely used in communication devices. To improve the communication transmission capabilities of programming cables, Bluetooth communication technology can be integrated into the programming cable. Utility Model Content

[0004] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures particularly pointed out in the description and other accompanying drawings.

[0005] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a Bluetooth communication programming circuit and its programming cable. By setting a Bluetooth master control chip and a Bluetooth signal transceiver module in the programming chip box of the programming cable, Bluetooth communication function is realized, enabling communication and programming with a walkie-talkie on a mobile phone or computer. At the same time, a USB interface is provided to connect to the mobile phone or computer. After connection, power is directly drawn from the USB interface to provide power for the operation of the chip in the programming chip box. Compared with the conventional method of setting a battery power supply in the programming chip box, this application optimizes the elimination of the battery, effectively reducing the overall size of the programming cable and making it easy to carry.

[0006] This utility model provides a Bluetooth communication frequency programming circuit, including a Bluetooth master control chip, a Bluetooth signal transceiver module and a power supply module. The RF terminal of the Bluetooth master control chip is connected to the Bluetooth signal transceiver module, the power supply terminal of the Bluetooth master control chip is connected to the power supply module, and the serial port terminal of the Bluetooth master control chip is connected to a UART interface.

[0007] The power supply module includes a USB interface, a power supply circuit, and a conversion chip. The TP1 port of the USB interface is connected to the power supply circuit. The TP2 port, DP port, and DM port of the USB interface are all grounded. The USB interface is connected to the input terminal of the conversion chip via the power supply circuit. The output terminal of the conversion chip is connected to the power supply terminal VBAT / VDDIO of the Bluetooth master control chip.

[0008] The Bluetooth master control chip receives wireless Bluetooth communication signals from mobile phones or computers through the Bluetooth signal transceiver module and transmits the signals to the walkie-talkie through the UART interface. The power supply module provides 3.3V voltage to the entire Bluetooth communication programming circuit to maintain operation. Compared with the conventional battery-powered method, this application sets up a power supply module with a USB interface. By plugging the USB interface into the mobile phone or computer, the TP1 port obtains a high level to achieve direct power supply, thus eliminating the need for a battery and effectively reducing the overall size of the programming line. It is understood that since only the TP1 port is used for power supply, the other pins in the USB interface are grounded.

[0009] The voltage obtained from the mobile phone or computer is different from the voltage required for chip operation. Therefore, a power supply circuit and a conversion chip are added to convert the 5V voltage obtained from the mobile phone or computer into a 3.3V voltage that can be used by the chip. The technical solution for converting 5V voltage to 3.3V voltage that can be used by the chip is well known to those skilled in the art, and will not be described in detail here. Refer to the prior art. In actual production, the power supply circuit is set differently depending on the model of the conversion chip. This application does not make specific limitations here.

[0010] In some embodiments, the UART interface further includes a first level conversion circuit and a second level conversion circuit. The UART interface includes a TX pin and an RX pin. The TX pin is connected to the serial port input terminal USB0_DP of the Bluetooth master control chip through the first level conversion circuit, and the serial port output terminal USB0_DM of the Bluetooth master control chip is connected to the RX pin through the second level conversion circuit. The UART interface, in the physical programming cable, is the interface for connecting to the walkie-talkie. It generally includes a TX pin and an RX pin, which perform input and output functions respectively, realizing bidirectional communication. The TX pin realizes communication input through the first level conversion circuit, while the serial port output terminal USB0_DM of the Bluetooth master control chip realizes communication output through the second level conversion circuit. It is understood that in this application, the UART interface can be any one of the following types that can be accepted by the walkie-talkie: K-type, M-type, Micro-USB, Type-C, and Linghting. The specific interface type can be adapted according to the actual application interface of the walkie-talkie, and the modified technical solution is existing technology, which will not be elaborated here.

[0011] In some embodiments, the first level conversion circuit includes two NPN transistors connected in sequence with resistance. The collector of NPN transistor Q2 is connected to the base of NPN transistor Q1. The base of NPN transistor Q2 is connected to the TX pin. The collector of NPN transistor Q1 is connected to the serial port input terminal USB0_DP of the Bluetooth main control chip. The emitters of both NPN transistors Q2 and Q1 are grounded. The collectors of both NPN transistors Q2 and Q1 are connected to the power supply module. The above-mentioned first level conversion circuit is designed to interface the voltage between the walkie-talkie and the Bluetooth main control chip. When TX is high, Q2 conducts and Q1 does not conduct, and the USB0_DP terminal is correspondingly high. That is, when the walkie-talkie has a normal voltage of 3V, the circuit conducts normally, realizing normal communication with the USB0_DP terminal. If the voltage of the walkie-talkie is abnormal, communication will not occur.

[0012] In some embodiments, the second level conversion circuit includes two NPN transistors connected in sequence with resistance. The collector of NPN transistor Q3 is connected to the base of NPN transistor Q4, the collector of NPN transistor Q4 is connected to the RX pin, the base of NPN transistor Q3 is connected to the serial port input terminal USB0_DM of the Bluetooth main control chip, the emitters of both NPN transistors Q3 and Q4 are grounded, and the collectors of both NPN transistors Q3 and Q4 are connected to the power supply module. Since the communication direction is opposite, the second level conversion circuit is the reverse of the first level conversion circuit, but the effect is the same: when the USB0_DM terminal is high, the RX terminal is also high, achieving connectivity. The NPN transistors Q1 to Q4 have the function of low voltage drop and high-efficiency conversion, realizing voltage conversion while improving the stability of the line.

[0013] In some embodiments, the conversion chip is further provided with an enable terminal EN, which is connected in parallel with the input terminal of the conversion chip after being connected in series with a resistor R3. EN is the enable terminal of the conversion chip. The entire module can only work normally when this pin is activated, for example, when it is set to a high level. Therefore, while the input terminal of the conversion chip receives power from the USB port, the parallel enable terminal EN is simultaneously powered on, activating the chip to perform the step of converting voltage and outputting it.

[0014] In some embodiments, the Bluetooth transceiver module includes a Bluetooth antenna E1 and an antenna matching circuit. One end of the antenna matching circuit is connected to the Bluetooth antenna E1, and the other end is connected to the RF terminal of the Bluetooth main control chip. After the Bluetooth main control chip is powered on and activated, the Bluetooth antenna E1 is turned on to receive Bluetooth wireless communication data from a mobile phone or computer, enabling the frequency programming function of the walkie-talkie. In practical applications, the power supply circuit varies depending on the antenna model from different manufacturers and is generally provided by the manufacturer. This is existing technology, and this application does not specifically limit the Bluetooth transceiver module.

[0015] In some embodiments, a crystal oscillator is also included. Port 1 of the crystal oscillator is electrically connected to the BTOSCI port of the Bluetooth master control chip, port 3 of the crystal oscillator is electrically connected to the BTOSCI port of the Bluetooth master control chip, and ports 2 and 4 of the crystal oscillator are grounded. The crystal oscillator provides a basic clock signal to the circuit, ensuring that each circuit module can operate according to the correct timing sequence. It is a necessary setting for the circuit and is used in this application to supplement circuit integrity. Specific methods for connecting the crystal oscillator can be found in existing technologies.

[0016] In some embodiments, an LED indicator circuit is also included. One end of the LED indicator circuit is connected to the output terminal of the power supply module, and the other end is connected to the PA9 pin of the Bluetooth master control chip. The LED indicator circuit is sequentially connected to a resistor R1 and an indicator light LED1. The LED indicator circuit is used to indicate whether the Bluetooth master control chip is started. When the power supply module is drawing power normally, the LED lights up, indicating that there is power. When the LED is off, it indicates that no power is being drawn or that the programming circuit has malfunctioned.

[0017] In some embodiments, the VSS terminal of the Bluetooth master control chip is grounded. Grounding the VSS terminal is a normal setting for the Bluetooth master control chip, allowing the chip to operate normally.

[0018] A Bluetooth communication programming cable includes a USB interface, a connecting cable, a UART interface, and a main control chip box. The main control chip box has the UART interface and is electrically connected to it. The main control chip box contains a Bluetooth communication programming circuit. The USB interface is electrically connected to the main control chip box via the connecting cable. The USB interface is a free end for connecting to a mobile phone or computer and has four pins, three of which are grounded. The TP1 end is electrically connected to the main control chip box via the connecting cable. The main control chip box contains a power supply circuit and a conversion chip to power the Bluetooth main control chip. After the Bluetooth main control chip is powered on, the Bluetooth signal transceiver module is activated, receiving Bluetooth programming communication information from the mobile phone or computer, and then transmitting it to a walkie-talkie via the UART interface, thus realizing the programming function.

[0019] By adopting the above technical solution, the beneficial effects of this utility model are:

[0020] This invention incorporates a Bluetooth master control chip and a Bluetooth signal transceiver module within the programming chip box of the programming cable to enable Bluetooth communication. This allows for programming communication with a walkie-talkie via a mobile phone or computer. A USB interface is also included for connection to the mobile phone or computer, providing power directly to the chip within the programming chip box. Compared to conventional battery-powered programming chip boxes, this invention eliminates the need for a battery, effectively reducing the overall size of the programming cable and making it more portable.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0022] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and illustrations.

[0023] To make the above and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0025] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0027] Figure 1 This is a schematic diagram showing the connection between the Bluetooth master control chip and the Bluetooth signal transceiver module in some embodiments of this utility model;

[0028] Figure 2 This is a schematic diagram of the specific structure of the power supply module in some embodiments of this utility model;

[0029] Figure 3The following are schematic diagrams showing the specific structures of the first level conversion circuit and the second level conversion circuit in some embodiments of this utility model;

[0030] Figure 4 This is a schematic diagram of the overall structure of the writing line in some embodiments of this utility model.

[0031] Explanation of key figure labels:

[0032] 1. Bluetooth signal transceiver module; 2. Power supply module; 3. First level conversion circuit; 4. Second level conversion circuit; 5. LED indicator circuit; 6. USB interface terminal; 7. Connecting cable; 8. UART interface terminal; 9. Main control chip box. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0034] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected through a transitional structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0036] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] Reference Figures 1-2 , Figure 1 This is a schematic diagram showing the connection between the Bluetooth master control chip and the Bluetooth signal transceiver module in some embodiments of this utility model; Figure 2 This is a schematic diagram of the specific structure of the power supply module in some embodiments of this utility model.

[0038] According to some embodiments of the present invention, the present invention provides a Bluetooth communication programming circuit, including a Bluetooth master control chip U2, a Bluetooth signal transceiver module 1 and a power supply module 2. The RF terminal of the Bluetooth master control chip U2 is connected to the Bluetooth signal transceiver module 1, the power supply terminal of the Bluetooth master control chip U2 is connected to the power supply module 2, and the serial port terminal of the Bluetooth master control chip U2 is connected to a UART interface.

[0039] The power supply module 2 includes a USB interface, a power supply circuit, and a conversion chip U1. The TP1 port of the USB interface is connected to the power supply circuit. The TP2 port, DP port, and DM port of the USB interface are all grounded. The USB interface is connected to the input terminal of the conversion chip U1 through the power supply circuit. The output terminal of the conversion chip U1 is connected to the power supply terminal VBAT / VDDIO of the Bluetooth master control chip U2.

[0040] The Bluetooth master control chip U2 receives wireless Bluetooth communication signals from mobile phones or computers through the Bluetooth signal transceiver module 1 and transmits the signals to the walkie-talkie through the UART interface. The power supply module 2 provides a 3.3V voltage to the entire Bluetooth communication programming circuit to keep it running. Compared with the conventional battery-powered method, this application sets up a power supply module 2 with a USB interface. By plugging the USB interface into the mobile phone or computer, the TP1 port obtains a high level to achieve direct power supply, thus eliminating the need for a battery and effectively reducing the overall size of the programming line. It can be understood that since only the TP1 port is used for power supply, the other pins in the USB interface are grounded.

[0041] The voltage obtained from the mobile phone or computer is different from the voltage required for the chip to operate. Therefore, a power supply circuit and a conversion chip U1 are added to convert the 5V voltage obtained from the mobile phone or computer into a 3.3V voltage that can be used by the chip. The technical solution for converting 5V voltage to 3.3V voltage that can be used by the chip is well known to those skilled in the art, and will not be described in detail here. Refer to the prior art. In actual production, the power supply circuit is set differently depending on the model of the conversion chip U1. This application does not make specific limitations here.

[0042] The converter chip U1 also has an enable pin EN, which is connected in parallel with the input pin of the converter chip U1 after being connected in series with resistor R3. EN is the enable pin of the converter chip U1. Only when this pin is activated, for example, when it is set to a high level, can the entire module work normally. Therefore, while the input pin of the converter chip U1 receives power from the USB port, the parallel enable pin EN is simultaneously powered on, activating the chip to perform the voltage conversion and output steps.

[0043] The Bluetooth transceiver module 1 includes a Bluetooth antenna E1 and an antenna matching circuit. One end of the antenna matching circuit is connected to the Bluetooth antenna E1, and the other end is connected to the RF terminal of the Bluetooth main control chip U2. After the Bluetooth main control chip U2 is powered on and activated, the Bluetooth antenna E1 is turned on to receive Bluetooth wireless communication data from a mobile phone or computer, enabling the frequency programming function of the walkie-talkie. In actual use, the power supply circuit is different depending on the antenna model from the manufacturer, and is generally provided by the manufacturer. This is existing technology, and this application does not make specific limitations on the Bluetooth transceiver module 1.

[0044] The programming circuit also includes a crystal oscillator Y1. Port 1 of crystal oscillator Y1 is electrically connected to the BTOSCI port of the Bluetooth master control chip U2, and port 3 of crystal oscillator Y1 is electrically connected to the BTOSCI port of the Bluetooth master control chip U2. Ports 2 and 4 of crystal oscillator Y1 are grounded. The crystal oscillator provides a basic clock signal to the circuit, ensuring that each circuit module can operate according to the correct time sequence. It is a necessary setting for the circuit and is used in this application to supplement the circuit integrity. Specific methods for connecting the crystal oscillator can be found in existing technologies.

[0045] The programming circuit also includes an LED indicator circuit 5. One end of the LED indicator circuit 5 is connected to the output terminal of the power supply module 2, and the other end is connected to the PA9 pin of the Bluetooth master control chip U2. The LED indicator circuit 5 is sequentially connected to a resistor R1 and an indicator light LED1. The LED indicator circuit 5 is used to indicate whether the Bluetooth master control chip U2 is started. When the power supply module 2 is receiving power normally, the LED lights up, indicating that there is power. When the LED is off, it indicates that no power is being received or that the programming circuit has malfunctioned.

[0046] The VSS terminal of the Bluetooth master control chip U2 is grounded. Grounding the VSS terminal is a normal setting for the Bluetooth master control chip U2, allowing the chip to operate normally.

[0047] Reference Figure 3 , Figure 3 The diagram shows the specific structure of the first level conversion circuit and the second level conversion circuit in some embodiments of this utility model.

[0048] According to some embodiments of this utility model, optionally, the programming circuit further includes a first level conversion circuit 3 and a second level conversion circuit 4. The UART interface includes a TX pin and an RX pin. The TX pin is connected to the serial port input terminal USB0_DP of the Bluetooth master control chip U2 through the first level conversion circuit 3, and the serial port output terminal USB0_DM of the Bluetooth master control chip U2 is connected to the RX pin through the second level conversion circuit 4. The UART interface in the physical programming cable is the interface for connecting to the walkie-talkie, generally including a TX pin and an RX pin, which perform input and output functions respectively to realize bidirectional communication. The TX pin realizes communication input through the first level conversion circuit 3, while the serial port output terminal USB0_DM of the Bluetooth master control chip U2 realizes communication output through the second level conversion circuit 4. It can be understood that in this application, the UART interface is any one of the following that can be accepted by the walkie-talkie: K-type, M-type, Micro-USB, Type-C, and Linghting. The specific interface type can be adapted to the actual application interface of the walkie-talkie, and the modified technical solution is the prior art, which will not be elaborated here.

[0049] The first level conversion circuit 3 includes two NPN transistors connected in sequence with resistance. The collector of NPN transistor Q2 is connected to the base of NPN transistor Q1. The base of NPN transistor Q2 is connected to the TX pin. The collector of NPN transistor Q1 is connected to the serial port input terminal USB0_DP of the Bluetooth main control chip U2. The emitters of both NPN transistors Q2 and Q1 are grounded. The collectors of both NPN transistors Q2 and Q1 are connected to the power supply module 2. The first level conversion circuit 3 is designed to interface the voltage between the walkie-talkie and the Bluetooth main control chip U2. When TX is high, Q2 conducts and Q1 does not conduct, and the USB0_DP terminal is correspondingly high. That is, when the walkie-talkie has a normal voltage of 3V, the circuit conducts normally, realizing normal communication with the USB0_DP terminal. If the voltage of the walkie-talkie is abnormal, communication will not occur.

[0050] The second level conversion circuit 4 includes two NPN transistors connected in sequence with resistance. The collector of NPN transistor Q3 is connected to the base of NPN transistor Q4, and the collector of NPN transistor Q4 is connected to the RX pin. The base of NPN transistor Q3 is connected to the serial port input terminal USB0_DM of the Bluetooth main control chip U2. The emitters of both NPN transistors Q3 and Q4 are grounded, and the collectors of both NPN transistors Q3 and Q4 are connected to the power supply module 2. Since the communication direction is opposite, the second level conversion circuit 4 is the reverse of the first level conversion circuit 3, but the effect is the same: when the USB0_DM terminal is high, the RX terminal is also high, achieving connectivity. The NPN transistors Q1 to Q4 have low voltage drop and high efficiency conversion capabilities, achieving voltage conversion while improving line stability.

[0051] Reference Figure 4 , Figure 4 This is a schematic diagram of the overall structure of the writing line in some embodiments of this utility model.

[0052] Optionally, according to some embodiments of this utility model, this utility model also provides a Bluetooth communication programming cable. The programming cable includes a USB interface 6, a connecting cable 7, a UART interface 8, and a main control chip box 9. The main control chip box 9 has the UART interface 8, which is electrically connected to the main control chip box 9. The main control chip box 9 contains a Bluetooth communication programming circuit. The USB interface 6 is electrically connected to the main control chip box 9 via the connecting cable 7. The USB interface 6 is a free end used for connecting to a mobile phone or computer, and has four pins, three of which are grounded. The TP1 end is electrically connected to the main control chip box 9 via the connecting cable 7. The main control chip box 9 contains a power supply circuit and a conversion chip U1 to power the Bluetooth main control chip U2. After the Bluetooth main control chip U2 is powered on, the Bluetooth signal transceiver module 1 is activated, receiving Bluetooth programming communication information from the mobile phone or computer, and then connecting to a walkie-talkie via the UART interface 8 to transmit the information, thus realizing the programming function.

[0053] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0054] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0055] Furthermore, the described features or characteristics may be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented without the aforementioned one or more specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A Bluetooth communication programming circuit, characterized in that, It includes a Bluetooth master control chip, a Bluetooth signal transceiver module, and a power supply module. The RF terminal of the Bluetooth master control chip is connected to the Bluetooth signal transceiver module, the power supply terminal of the Bluetooth master control chip is connected to the power supply module, and the serial port terminal of the Bluetooth master control chip is connected to a UART interface. The power supply module includes a USB interface, a power supply circuit, and a conversion chip. The TP1 port of the USB interface is connected to the power supply circuit. The TP2 port, DP port, and DM port of the USB interface are all grounded. The USB interface is connected to the input terminal of the conversion chip via the power supply circuit. The output terminal of the conversion chip is connected to the power supply terminal VBAT / VDDIO of the Bluetooth master control chip.

2. The Bluetooth communication programming circuit according to claim 1, characterized in that, It also includes a first level conversion circuit and a second level conversion circuit. The UART interface includes a TX pin and an RX pin. The TX pin is connected to the serial port input terminal USB0_DP of the Bluetooth master control chip through the first level conversion circuit. The serial port output terminal USB0_DM of the Bluetooth master control chip is connected to the RX pin through the second level conversion circuit.

3. The Bluetooth communication programming circuit according to claim 2, characterized in that, The first level conversion circuit includes two NPN transistors connected in sequence with resistance. The collector of the NPN transistor Q2 is connected to the base of the NPN transistor Q1. The base of the NPN transistor Q2 is connected to the TX pin. The collector of the NPN transistor Q1 is connected to the serial port input terminal USB0_DP of the Bluetooth master control chip. The emitters of both the NPN transistor Q2 and the NPN transistor Q1 are grounded. The collectors of both the NPN transistor Q2 and the NPN transistor Q1 are connected to the power supply module.

4. The Bluetooth communication programming circuit according to claim 2, characterized in that, The second level conversion circuit includes two NPN transistors connected in sequence with resistance. The collector of the NPN transistor Q3 is connected to the base of the NPN transistor Q4. The collector of the NPN transistor Q4 is connected to the RX pin. The base of the NPN transistor Q3 is connected to the serial port input terminal USB0_DM of the Bluetooth master control chip. The emitters of both the NPN transistor Q3 and the NPN transistor Q4 are grounded. The collectors of both the NPN transistor Q3 and the NPN transistor Q4 are connected to the power supply module.

5. The Bluetooth communication programming circuit according to claim 1, characterized in that, The conversion chip also has an enable terminal EN, which is connected in series with resistor R3 and then in parallel with the input terminal of the conversion chip.

6. The Bluetooth communication programming circuit according to claim 1, characterized in that, The Bluetooth signal transceiver module includes a Bluetooth antenna E1 and an antenna matching circuit. One end of the antenna matching circuit is connected to the Bluetooth antenna E1, and the other end of the antenna matching circuit is connected to the RF terminal of the Bluetooth main control chip.

7. The Bluetooth communication programming circuit according to claim 1, characterized in that, It also includes a crystal oscillator, whose port 1 is electrically connected to the BTOSCI port of the Bluetooth master control chip, whose port 3 is electrically connected to the BTOSCI port of the Bluetooth master control chip, and whose ports 2 and 4 are grounded.

8. The Bluetooth communication programming circuit according to claim 1, characterized in that, It also includes an LED indicator circuit, one end of which is connected to the output terminal of the power supply module, and the other end of which is connected to the PA9 pin of the Bluetooth main control chip. The LED indicator circuit is sequentially connected to a resistor R1 and an indicator LED1.

9. The Bluetooth communication programming circuit according to claim 1, characterized in that, The VSS terminal of the Bluetooth master control chip is grounded.

10. A Bluetooth communication programming cable, characterized in that, The Bluetooth communication programming circuit according to any one of claims 1-9 is described in the following: the programming cable includes a USB interface end, a connecting cable, a UART interface end, and a main control chip box. The main control chip box is provided with the UART interface end, which is electrically connected to the main control chip box. The Bluetooth communication programming circuit is provided inside the main control chip box, and the USB interface end is electrically connected to the main control chip box through the connecting cable.

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