Interface expansion device

Abstract

The utility model discloses an interface expansion device, and aims to solve the technical problems that the number of DB interfaces of an existing development board is small, and connectors used by the DB interfaces of the development board are inconsistent with general connectors in the market. The socket comprises a data interface socket unit, a pin socket unit, a first expansion socket, a second expansion socket and a power supply unit. According to the interface expansion device, random expansion of switching one path of input to four paths of output of the DB interface of the development board is realized, the first expansion slot and the second expansion slot are provided with connection interfaces of peripheral circuits of WiFi, Bluetooth and voice modules, and connection slots of corresponding modules are reserved, so that a user can add the interface by himself / herself conveniently. Through application of the interface expansion device, original module component resources of the embedded computer development platform and universal module resources in the market can be fully utilized, and users of the embedded computer development platform can be effectively expanded to perform comprehensive, autonomous and innovative creation.

Description

Technical Field

[0001] The utility model relates to the field of computers, in particular to an interface expansion device. Background Art

[0002] Embedded computer development platform is an important equipment for experimental training and certificate assessment. The embedded computer development platform needs to be configured with an external development board, but most development boards on the market currently have only one DB interface. One experimental training connects to one module component, which not only wastes module component resources, but also cannot combine and apply multiple module components according to the needs of experimental training. At the same time, since the pin spacing of the connector used in the development board DB interface is inconsistent with the pin spacing of the common sensor modules and communication modules on the market, it is very inconvenient for the embedded computer development platform to use module component resources from other manufacturers, and it also limits users from using the development platform for comprehensive and autonomous creation. Although technologies such as Wi-Fi, Bluetooth, and intelligent voice are widely used in daily production and life, there are no related module components in the existing embedded computer development platform. Therefore, in order to enhance the scalability of the embedded computer development platform, it is a technical problem to be solved to configure an interface expansion device for the development board DB interface. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to solve the above problem, the utility model provides an interface expansion device.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] An interface expansion device comprises: a data interface socket unit, a pin socket unit, a first expansion socket, a second expansion socket, and a power supply unit. The DB interface of an external development board is connected to the data interface socket unit, the data interface socket unit is connected to the pin socket unit and the power supply unit, the power supply unit is connected to the pin socket unit, the first expansion socket, and the second expansion socket, and the first expansion socket and the second expansion socket are respectively connected to the pin socket unit.

[0006] Furthermore, the data interface socket unit includes a first data interface socket, a second data interface socket, a third data interface socket, a fourth data interface socket, and a fifth data interface socket. The external development board DB interface is connected to the first data interface socket, and the first data interface socket, the second data interface socket, the third data interface socket, the fourth data interface socket, and the fifth data interface socket are connected in sequence. The fifth data interface socket is connected to the pin socket unit.

[0007] Furthermore, the power supply unit includes a power supply circuit, an external Type-C interface is connected to a first power input interface of the power supply circuit, a data interface socket unit is connected to a second power input interface of the power supply circuit, an output interface of the power supply circuit is provided with a DC-DC circuit, and the power supply circuit has two sets of output power supplies of 3.3V / 5V.

[0008] Furthermore, the power supply unit also includes a CH340C chip and a sixth slot, the D+ and D- data lines of the USB signal in the external Type-C interface are connected to the CH340C chip, and the UART data interface of the CH340C chip is connected to the sixth slot.

[0009] Furthermore, the pin socket unit includes a first pin socket, a second pin socket, a third pin socket, a fourth pin socket, and a fifth pin socket; the first pin socket includes a first power selection circuit, a first level conversion circuit, and a first slot, the output power end of the power circuit is sequentially connected to the first power selection circuit and the first slot, the first slot is connected to the first level conversion circuit, and the first level conversion circuit is connected to the I2C sub-interface of the data interface socket unit; the second pin socket includes a second power selection circuit, a second level conversion circuit, and a second slot, the output power end of the power circuit is sequentially connected to the second power selection circuit and the second slot, the second slot is connected to the second level conversion circuit, and the second level conversion circuit is connected to the UART0 sub-interface of the data interface socket unit; the third pin socket includes a third power selection circuit, a third level conversion circuit, and a The output power end of the power circuit is connected to the third power selection circuit and the third slot in sequence, the third slot is connected to the third level conversion circuit, and the third level conversion circuit is connected to the UART1 sub-interface of the data interface socket unit; the fourth pin socket includes a fourth power selection circuit, a fourth level conversion circuit and a fourth slot, the output power end of the power circuit is connected to the fourth power selection circuit and the fourth slot in sequence, the fourth slot is connected to the fourth level conversion circuit, and the fourth level conversion circuit is connected to the GPIO sub-interface of the data interface socket unit; the fifth pin socket includes a fifth power selection circuit, an ESD protection circuit and a fifth slot, the output power end of the power circuit is connected to the fifth power selection circuit and the fifth slot in sequence, the fifth slot is connected to the ESD protection circuit, and the ESD protection circuit is connected to the ADC sub-interface of the data interface socket unit.

[0010] Furthermore, the first slot is an I2C socket, the second slot is a UART0 socket, the third slot is a UART1 socket, the fourth slot is a GPIO socket, and the fifth slot is an ADC socket.

[0011] Furthermore, the first expansion socket includes a first UART selection circuit and a first expansion slot, and the UART0 socket, the UART1 socket, and the sixth slot are respectively connected to one end of the first UART selection circuit; one end of the first expansion slot is connected to two ends of the first UART selection circuit, and two ends of the first expansion slot are connected to the 3.3V output power end of the power supply circuit.

[0012] Furthermore, the second expansion socket includes a second UART selection circuit and a second expansion slot, the UART0 socket, the UART1 socket, and the sixth slot are respectively connected to one end of the second UART selection circuit, two ends of the second UART selection circuit are connected to one end of the second expansion slot, the 5V output power end of the power supply circuit is connected to two ends of the second expansion slot, and the third end of the second expansion slot is connected to the external voice signal input and output end.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The interface expansion device realizes the arbitrary expansion of 1-way input to 4-way output of the development board DB interface, and at the same time, the ADC, GPIO, UART, and I2C sub-interfaces in the DB interface are individually connected to their respective 2.54mm pin sockets, and the power supply voltage and signal level value of the sub-interface can be freely set; the connection interface of the WiFi, Bluetooth, and voice module peripheral circuits is equipped through the first expansion slot and the second expansion slot, and the connection slot of the corresponding module is reserved for users to add it by themselves.

[0015] Through the application of this interface expansion device, the original module component resources of the embedded computer development platform and the general module resources on the market can be fully utilized, effectively expanding the users of the embedded computer development platform to carry out comprehensive, autonomous and innovative creation.

[0016] The interface expansion device has the characteristics of simple structure, strong practicality, good expansibility, convenient use and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the interface expansion device of the utility model.

[0018] Figure numerals: 1 - data interface socket unit; 2 - pin socket unit; 3 - first extension socket; 4 - second extension socket; 5 - power supply unit. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore they cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; of course, it can also be a mechanical connection or an electrical connection; in addition, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Example 1

[0023] An interface expansion device includes a data interface socket unit 1, a pin socket unit 2, a first extension socket 3, a second extension socket 4, and a power supply unit 5. The external development board DB interface is connected to the data interface socket unit 1, the data interface socket unit 1 is connected to the pin socket unit 2 and the power supply unit 5, the power supply unit 5 is connected to the pin socket unit 2, the first extension socket 3, and the second extension socket 4, and the first extension socket 3 and the second extension socket 4 are respectively connected to the pin socket unit 2. In this embodiment, the development board DB interface 1-way signal input data interface socket unit 1, based on the data interface socket unit 1 can lead out a plurality of data interface sockets. In this embodiment, a plurality of sub-interfaces in the development board DB interface are individually led to their respective pin sockets, the pin sockets can adopt 2.54mm pin sockets, and the power supply voltage and signal level value of the sub-interfaces can be freely set; in this embodiment, the first extension socket 3 and the second extension socket 4 are also equipped with connection interfaces of the peripheral circuits of WiFi, Bluetooth, and voice modules, and the connection slots of the corresponding modules are reserved, so that users can add them by themselves.

[0024] Example 2

[0025] The data interface socket unit 1 includes a first data interface socket, a second data interface socket, a third data interface socket, a fourth data interface socket, and a fifth data interface socket. The external development board DB interface is connected to the first data interface socket, and the first data interface socket, the second data interface socket, the third data interface socket, the fourth data interface socket, and the fifth data interface socket are connected in sequence. The fifth data interface socket is connected to the pin socket unit 2. In this embodiment, the first data interface socket, the second data interface socket, the third data interface socket, the fourth data interface socket, and the fifth data interface socket are electrically connected to 5 IDC2.00-2-13P simple bull horn pin sockets to realize the transfer of any 1 input to the other 4 outputs.

[0026] Example 3

[0027] The power supply unit 5 includes a power supply circuit, an external Type-C interface is connected to a first power input interface of the power supply circuit, and a data interface socket unit 1 is connected to a second power input interface of the power supply circuit. The power supply circuit preferentially selects a 5V power supply input from an external Type-C interface as a circuit working power supply, and realizes 5V to 3.3V conversion through a DC-DC circuit, and simultaneously leads out two sets of 3.3V / 5V power supplies to the power supply circuit output interface, providing stable and reliable two sets of 3.3V / 5V power supplies for other unit circuits.

[0028] The power supply unit 5 also includes a CH340C chip and a sixth slot. The D+ and D- data lines of the USB signal in the external Type-C interface are connected to the CH340C chip, and the UART data interface of the CH340C chip is connected to the sixth slot. In this embodiment, the CH340C chip constitutes a USB to TTL serial port circuit, which leads the TTL serial port signal to the sixth slot output and provides a USB to TTL serial port to the outside.

[0029] Example 4

[0030] Furthermore, the pin socket unit 2 includes a first pin socket, a second pin socket, a third pin socket, a fourth pin socket, and a fifth pin socket; the first pin socket includes a first power selection circuit, a first level conversion circuit, and a first slot, the output power end of the power circuit is sequentially connected to the first power selection circuit and the first slot, the first slot is connected to the first level conversion circuit, and the first level conversion circuit is connected to the I2C sub-interface of the data interface socket unit 1; the second pin socket includes a second power selection circuit, a second level conversion circuit, and a second slot, the output power end of the power circuit is sequentially connected to the second power selection circuit and the second slot, the second slot is connected to the second level conversion circuit, and the second level conversion circuit is connected to the UART0 sub-interface of the data interface socket unit 1; the third pin socket includes a third power selection circuit, a third level conversion circuit, and a The output power end of the power circuit is connected to the third power selection circuit and the third slot in sequence, the third slot is connected to the third level conversion circuit, and the third level conversion circuit is connected to the UART1 sub-interface of the data interface socket unit 1; the fourth pin socket includes a fourth power selection circuit, a fourth level conversion circuit and a fourth slot, the output power end of the power circuit is connected to the fourth power selection circuit and the fourth slot in sequence, the fourth slot is connected to the fourth level conversion circuit, and the fourth level conversion circuit is connected to the GPIO sub-interface of the data interface socket unit 1; the fifth pin socket includes a fifth power selection circuit, an ESD protection circuit and a fifth slot, the output power end of the power circuit is connected to the fifth power selection circuit and the fifth slot in sequence, the fifth slot is connected to the ESD protection circuit, and the ESD protection circuit is connected to the ADC sub-interface of the data interface socket unit 1. In this embodiment, the pin socket unit 2 classifies and leads out the ADC, GPIO, UART, and I2C sub-interfaces in the data interface socket unit 1 using a pin socket with a spacing of 2.54mm to solve the problem that the current pin spacing is inconsistent with the pin spacing of the sensor module and the communication module commonly used on the market.

[0031] In this embodiment, the power selection circuit uses a PZ2.54-2-2P double-row pin header to connect the output power end of the power circuit, and uses a jumper cap to select the output power voltage 3.3V or 5V connected to the sub-interface slot; the level conversion circuit converts the 3.3V level signal of the data interface socket unit 1 into the 3.3V or 5V level signal required by the peripheral device; the ESD protection circuit uses an ESD3.3V electrostatic discharge protection device and a 1K+1nF RC low-pass filter combination to achieve ESD protection and acquisition voltage overvoltage limitation.

[0032] The first slot is an I2C socket, the second slot is a UART0 socket, the third slot is a UART1 socket, the fourth slot is a GPIO socket, and the fifth slot is an ADC socket.

[0033] Example 5

[0034] The first extension socket 3 includes a first UART selection circuit and a first extension slot, and the UART0 socket, the UART1 socket, and the sixth slot are respectively connected to one end of the first UART selection circuit; one end of the first extension slot is connected to two ends of the first UART selection circuit, and two ends of the first extension slot are connected to the 3.3V output power supply end of the power supply circuit. In this embodiment, the first extension slot is powered by 3.3V, and the circuit reserves connection slots for WiFi modules and Bluetooth modules. The first UART selection circuit is connected to three UART interfaces of UART0, UART1, and the sixth slot through double-row pin headers, and one of them is selected to be connected to the reserved connection slot through a jumper cap.

[0035] Example 6

[0036] The second extension socket 4 includes a second UART selection circuit and a second extension slot, the UART0 socket, the UART1 socket, and the sixth slot are respectively connected to one end of the second UART selection circuit, the second UART selection circuit is connected to one end of the second extension slot at two ends, the 5V output power end of the power supply circuit is connected to the second extension slot at two ends, and the second extension slot is connected to the external voice signal input and output end at three ends; in this embodiment, the second extension slot is powered by 5V, and a connection slot for a voice module is reserved on the circuit. The second UART selection circuit is connected to the three UART interfaces of UART0, UART1, and the sixth slot through a double row of pins, and one of them is selected by a jumper cap to connect to the reserved connection slot.

[0037] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention to illustrate the technical solution of the present invention, rather than limiting it, and certainly not limiting the patent scope of the present invention; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention; that is to say, any changes or embellishments made to the main design concept and spirit of the present invention that have no substantive significance, and the technical problems they solve are still consistent with the present invention, should be included in the protection scope of the present invention; in addition, the direct or indirect application of the technical solution of the present invention in other related technical fields is also included in the patent protection scope of the present invention.

Claims

1. An interface expansion device, characterized in that: include: The data interface socket unit, the pin socket unit, the first extension socket, the second extension socket, and the power supply unit, the DB interface of the external development board is connected to the data interface socket unit, the data interface socket unit is connected to the pin socket unit and the power supply unit, the power supply unit is connected to the pin socket unit, the first extension socket, and the second extension socket, and the first extension socket and the second extension socket are respectively connected to the pin socket unit.

2. The interface expansion device according to claim 1, characterized in that: The data interface socket unit includes a first data interface socket, a second data interface socket, a third data interface socket, a fourth data interface socket, and a fifth data interface socket. The external development board DB interface is connected to the first data interface socket, and the first data interface socket, the second data interface socket, the third data interface socket, the fourth data interface socket, and the fifth data interface socket are connected in sequence. The fifth data interface socket is connected to the pin socket unit.

3. The interface expansion device according to claim 1, characterized in that: The power supply unit includes a power supply circuit, an external Type-C interface is connected to a first power input interface of the power supply circuit, a data interface socket unit is connected to a second power input interface of the power supply circuit, an output interface of the power supply circuit is provided with a DC-DC circuit, and the power supply circuit has two sets of output power supplies of 3.3V / 5V.

4. The interface expansion device according to claim 3, characterized in that: The power supply unit also includes a CH340C chip and a sixth slot. The D+ and D- data lines of the USB signal in the external Type-C interface are connected to the CH340C chip, and the UART data interface of the CH340C chip is connected to the sixth slot.

5. The interface expansion device according to claim 4, characterized in that: The pin socket unit includes a first pin socket, a second pin socket, a third pin socket, a fourth pin socket, and a fifth pin socket; the first pin socket includes a first power selection circuit, a first level conversion circuit, and a first slot, the output power end of the power circuit is sequentially connected to the first power selection circuit and the first slot, the first slot is connected to the first level conversion circuit, and the first level conversion circuit is connected to the I2C sub-interface of the data interface socket unit; the second pin socket includes a second power selection circuit, a second level conversion circuit, and a second slot, the output power end of the power circuit is sequentially connected to the second power selection circuit and the second slot, the second slot is connected to the second level conversion circuit, and the second level conversion circuit is connected to the UART0 sub-interface of the data interface socket unit; the third pin socket includes a third power selection circuit, a third level conversion circuit, and The third slot, the output power end of the power supply circuit is connected to the third power selection circuit and the third slot in sequence, the third slot is connected to the third level conversion circuit, and the third level conversion circuit is connected to the UART1 sub-interface of the data interface socket unit; the fourth pin socket includes a fourth power selection circuit, a fourth level conversion circuit and a fourth slot, the output power end of the power supply circuit is connected to the fourth power selection circuit and the fourth slot in sequence, the fourth slot is connected to the fourth level conversion circuit, and the fourth level conversion circuit is connected to the GPIO sub-interface of the data interface socket unit; the fifth pin socket includes a fifth power selection circuit, an ESD protection circuit and a fifth slot, the output power end of the power supply circuit is connected to the fifth power selection circuit and the fifth slot in sequence, the fifth slot is connected to the ESD protection circuit, and the ESD protection circuit is connected to the ADC sub-interface of the data interface socket unit.

6. The interface expansion device according to claim 5, characterized in that: The first slot is an I2C socket, the second slot is a UART0 socket, the third slot is a UART1 socket, the fourth slot is a GPIO socket, and the fifth slot is an ADC socket.

7. The interface expansion device according to claim 6, characterized in that: The first extension socket includes a first UART selection circuit and a first extension slot. The UART0 socket, the UART1 socket, and the sixth slot are respectively connected to one end of the first UART selection circuit; one end of the first extension slot is connected to two ends of the first UART selection circuit, and two ends of the first extension slot are connected to the 3.3V output power end of the power supply circuit.

8. The interface expansion device according to claim 6, characterized in that: The second extension socket includes a second UART selection circuit and a second extension slot, the UART0 socket, the UART1 socket, and the sixth slot are respectively connected to one end of the second UART selection circuit, two ends of the second UART selection circuit are connected to one end of the second extension slot, the 5V output power end of the power supply circuit is connected to two ends of the second extension slot, and the third end of the second extension slot is connected to an external voice signal input and output end.

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