Serial port connection board and cloud computer test system

Abstract

The embodiment of the utility model provides a serial port connection board and a cloud computer test system. The serial port connection board comprises a substrate, and a serial port conversion circuit, a first TypeC interface, a MicroUSB interface, a TypeA interface and a serial port interface which are arranged on the substrate; the serial port conversion circuit is connected with the first TypeC interface through a first connecting line and is connected with the MicroUSB interface through a second connecting line; the first TypeC interface is connected with the TypeA interface through a third connecting line, and the first TypeC interface is connected with the serial port interface through a fourth connecting line. In the process that the electronic equipment is tested by the test equipment, the test equipment and the tested electronic equipment can carry out reliable and high-compatibility communication under the condition that the appearance of the electronic equipment is not damaged through the serial port connecting plate.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of communication, and particularly relate to a serial port connection board and a cloud computer testing system. BACKGROUND

[0002] In the process of testing electronic devices, it is usually necessary to perform serial port communication between the electronic devices to be tested and testing devices. In the prior art, in order to realize the serial port communication between the electronic devices to be tested and the testing devices, it is usually necessary to disassemble the electronic devices to be tested, weld serial port pins at corresponding serial port endpoints of the electronic devices, connect the serial port pins and the testing devices through the mode of flying wires, and then realize the serial port communication. This serial port communication mode not only destroys the appearance of the electronic devices to be tested, changes the electronic devices to be tested into defective products, and has a large material loss, but also has a complex operation. If the serial port pins cannot be welded inside the electronic devices to be tested, the TXD, RXD and GND serial ports of the electronic devices to be tested can only be led out in the form of test points, and the reliability is low. Moreover, since the electronic devices to be tested need to be connected to multiple testing devices, the interfaces of the electronic devices to be tested are less, and cannot be compatible with the interfaces of the multiple testing devices, the interface compatibility is low, and the testing efficiency is reduced. In summary, the prior art cannot realize reliable and high-compatibility communication of the electronic devices to be tested without destroying the electronic devices to be tested. Therefore, in the process of testing electronic devices, how to ensure reliable and high-compatibility communication of the electronic devices to be tested without damaging the appearance of the electronic devices is a technical problem to be solved at present. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the present application provide a serial port connection board and a cloud computer testing system, and aim to solve the technical problem of how to ensure reliable and high-compatibility communication of the electronic devices to be tested without damaging the appearance of the electronic devices.

[0004] A serial port connection board comprises a substrate, a serial port conversion circuit, a first TypeC interface, a MicroUSB interface, a TypeA interface and a serial port interface which are arranged on the substrate;

[0005] The serial port conversion circuit is connected with the first TypeC interface through a first connecting line, and connected with the MicroUSB interface through a second connecting line;

[0006] The first TypeC interface is connected with the TypeA interface through a third connecting line, and connected with the serial port interface through a fourth connecting line.

[0007] Preferably, the serial port conversion circuit comprises a serial port chip, a USB signal transmission unit and an oscillation unit.

[0008] The TXD pin of the serial port chip is connected with the SBU1 pin of the first TypeC interface, and the RXD pin of the serial port chip is connected with the SBU2 pin of the first TypeC interface;

[0009] One end of the USB signal transmission unit is connected with the serial port chip, and the other end of the USB signal transmission unit is connected with the MicroUSB interface;

[0010] The first end of the oscillation unit is connected with the XI pin of the serial port chip, and the second end of the oscillation unit is connected with the XO pin of the serial port chip.

[0011] Preferably, the USB signal transmission unit comprises a first resistor and a second resistor, one end of the first resistor is connected with the UD+ pin of the serial port chip, the other end of the first resistor is connected with the D+ pin of the MicroUSB interface, one end of the second resistor is connected with the UD- pin of the serial port chip, and the other end of the second resistor is connected with the D- pin of the MicroUSB interface.

[0012] Preferably, the oscillation unit comprises a crystal oscillator, a first capacitor and a second capacitor;

[0013] The XTAL1 end of the crystal oscillator is connected with the XI pin of the serial port chip and grounded through the first capacitor;

[0014] The XTAL2 end of the crystal oscillator is connected with the XO pin of the serial port chip and grounded through the second capacitor.

[0015] Preferably, the serial port conversion circuit further comprises a third resistor and a fourth resistor;

[0016] One end of the third resistor is connected with the TXD pin of the serial port chip, and the other end of the third resistor is connected with a chip power supply end;

[0017] One end of the fourth resistor is connected with the RXD pin of the serial port chip, and the other end of the fourth resistor is connected with the chip power supply end;

[0018] The chip power supply end is used for supplying power for the serial port chip.

[0019] Preferably, the serial port conversion circuit comprises a chip power supply unit;

[0020] The chip power supply unit comprises a voltage stabilizer, a third capacitor and a fourth capacitor;

[0021] The input end of the voltage stabilizer is connected with a connection plate power supply end;

[0022] One end of the third capacitor and the output end of the voltage stabilizer are connected, and the other end of the third capacitor is grounded;

[0023] One end of the fourth capacitor is connected to the output end of the voltage stabilizer, and the other end of the fourth capacitor is grounded;

[0024] The output end of the voltage stabilizer forms a chip power supply end for supplying power to the serial port chip.

[0025] Preferably, the serial port conversion circuit further comprises a chip working indication unit;

[0026] The chip working indication unit comprises a fifth resistor and a light-emitting diode, one end of the fifth resistor is connected to the chip power supply end, the other end of the fifth resistor is connected to the anode of the light-emitting diode, and the cathode of the light-emitting diode is grounded.

[0027] Preferably, the serial port connection board further comprises a second TypeC interface; the second TypeC interface comprises a sixth resistor and a seventh resistor;

[0028] The CC1 pin of the second TypeC interface is connected to one end of the sixth resistor, and the other end of the sixth resistor is grounded;

[0029] The CC2 pin of the second TypeC interface is connected to one end of the seventh resistor, and the other end of the seventh resistor is grounded;

[0030] The VBUS1 pin, the VBUS2 pin, the VBUS3 pin and the VBUS4 pin of the second TypeC interface form a connection board power supply end;

[0031] The VBUS1 pin, the VBUS2 pin, the VBUS3 pin and the VBUS4 pin of the second TypeC interface are respectively connected to the VBUS1 pin, the VBUS2 pin, the VBUS3 pin and the VBUS4 pin of the first TypeC interface.

[0032] Preferably, the TXD pin of the first TypeC interface is connected to the TXD pin of the serial port interface, and the RXD pin of the first TypeC interface is connected to the RXD pin of the serial port interface;

[0033] The DP1 pin and the DP2 pin of the first TypeC interface are respectively connected to the D+ pin of the TypeA interface, and the DN1 pin and the DN2 pin of the first TypeC interface are respectively connected to the D- pin of the TypeA interface.

[0034] The cloud computer test system comprises the serial port connecting board, the cloud computer and the test equipment, the first TypeC interface of the serial port connecting board is used for connecting the cloud computer, and the MicroUSB interface, the TypeA interface and the serial port interface of the serial port connecting board are used for being connected with the test equipment.

[0035] The serial port connecting board and the cloud computer test system provided by the utility model set the serial port conversion circuit, the first TypeC interface, the MicroUSB interface, the TypeA interface and the serial port interface in the same serial port connecting board, and the first TypeC interface is connected with the serial port conversion circuit, and the serial port conversion circuit is connected with the MicroUSB interface, so that the serial port communication between the electronic equipment to be tested and the test equipment is realized. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be briefly introduced the drawings needed to be used in the description of the utility model embodiment, obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained according to these drawings without the creative labor.

[0037] Figure 1 It is the connection schematic diagram of each component in the serial port connecting board in an embodiment of the utility model;

[0038] Figure 2 It is the circuit diagram of the serial port conversion circuit in an embodiment of the utility model;

[0039] Figure 3 It is the circuit diagram of the first TypeC interface in an embodiment of the utility model;

[0040] Figure 4 It is the circuit diagram of the MicroUSB interface in an embodiment of the utility model;

[0041] Figure 5 It is the circuit diagram of the chip power supply unit in an embodiment of the utility model;

[0042] Figure 6 is a circuit diagram of the chip working indication unit in an embodiment of the utility model;

[0043] Figure 7 is a circuit diagram of the second TypeC interface in an embodiment of the utility model;

[0044] Figure 8 is a circuit diagram of the serial port interface in an embodiment of the utility model;

[0045] Figure 9 is a circuit diagram of the TypeA interface in an embodiment of the utility model;

[0046] In the figure, U1, serial port chip;101, USB signal transmission unit;102, oscillation unit;103, chip power supply unit;104, chip working indication unit;XT01, crystal oscillator;R1, first resistor;R2, second resistor;R3, third resistor;R4, fourth resistor;R5, fifth resistor;R6, sixth resistor;R7, seventh resistor;R8, eighth resistor;C1, first capacitor;C2, second capacitor;C3, third capacitor;C4, fourth capacitor;C5, fifth capacitor;C6, sixth capacitor;C7, seventh capacitor;C8, eighth capacitor;C9, ninth capacitor;C10, tenth capacitor;C11, eleventh capacitor;LED, light emitting diode;U2, voltage stabilizer;USB 5V, connecting plate power supply end;VCC 3V3, chip power supply end. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0048] It should be understood that the utility model can be implemented in different forms, and should not be interpreted as being limited to the embodiments presented here. On the contrary, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. In the drawings, the size and relative size of layers and regions may be exaggerated for clarity throughout the same reference numerals represent the same elements.

[0049] It will be understood that when an element or layer is referred to as being "on", "adjacent", "connected to", or "coupled to" another element or layer, it can be directly on, adjacent, connected or coupled to the other element or layer, or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly adjacent", "directly connected to", or "directly coupled to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

[0050] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0051] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0052] For a thorough understanding of the present application, reference should be made to the following detailed description, in conjunction with the accompanying drawings, in which:

[0053] In an embodiment, a serial port connection board is provided, comprising a substrate, a serial port conversion circuit, a first Type-C interface, a Micro-USB interface, a Type-A interface and a serial port interface arranged on the substrate;

[0054] The serial port conversion circuit is connected to the first Type-C interface through a first connecting line and connected to the Micro-USB interface through a second connecting line;

[0055] The first Type-C interface is connected to the Type-A interface through a third connecting line and connected to the serial port interface through a fourth connecting line.

[0056] As an example, as shown in FIG. 1, a schematic diagram of the connection of each component in the serial port connection board is shown. As can be seen from FIG. 1, the serial port conversion circuit, the first Type-C interface, the Micro-USB interface, the Type-A interface and the serial port interface are arranged on the substrate of the serial port connection board. The serial port conversion circuit is connected to the first Type-C interface through a first connecting line and connected to the Micro-USB interface through a second connecting line. The first Type-C interface is connected to the Type-A interface through a third connecting line and connected to the serial port interface through a fourth connecting line. Figure 1 Figure 1 In this example, the first Type-C interface is connected to the serial port conversion circuit, which is used to transmit the received serial port signal to the serial port conversion circuit, so that the serial port conversion circuit converts the serial port signal into a USB signal, or transmits the serial port signal output by the serial port conversion circuit. The Micro-USB interface is connected to the serial port conversion circuit, which is used to transmit the converted USB signal, or transmit the received USB signal to the serial port conversion circuit, so that the serial port conversion circuit converts the USB signal into a serial port signal output.

[0057] During the testing of the electronic device, when it is necessary to transmit the serial port signal output by the tested electronic device to the testing device, the Type-C interface arranged on the tested electronic device is connected to the first Type-C interface on the serial port connection board, and the USB interface arranged on the testing device is connected to the Micro-USB interface. After the serial port signal of the tested electronic device is transmitted to the first Type-C interface on the serial port connection board through the Type-C interface on the electronic device, the first Type-C interface transmits the received serial port signal to the serial port conversion circuit. The serial port conversion circuit converts the received serial port signal into a USB signal and transmits the converted USB signal to the Micro-USB interface. The Micro-USB interface transmits the received USB signal to the testing device, so that the tool on the testing device converts the USB signal into a serial port signal and analyzes and tests the converted serial port signal.

[0058] During the testing of the electronic device, when it is necessary to transmit the serial port signal output by the tested electronic device to the testing device, the Type-C interface arranged on the tested electronic device is connected to the first Type-C interface on the serial port connection board, and the USB interface arranged on the testing device is connected to the Micro-USB interface. After the serial port signal of the tested electronic device is transmitted to the first Type-C interface on the serial port connection board through the Type-C interface on the electronic device, the first Type-C interface transmits the received serial port signal to the serial port conversion circuit. The serial port conversion circuit converts the received serial port signal into a USB signal and transmits the converted USB signal to the Micro-USB interface. The Micro-USB interface transmits the received USB signal to the testing device, so that the tool on the testing device converts the USB signal into a serial port signal and analyzes and tests the converted serial port signal. ​

[0059] When the test device needs to send a test command or other USB signal to the electronic device under test, the test device transmits the USB signal to the serial port conversion circuit through the MicroUSB interface. The serial port conversion circuit converts the USB signal into a serial port signal and outputs the converted serial port signal to the first TypeC interface. The first TypeC interface transmits the received serial port signal to the electronic device under test through the TypeC interface provided on the electronic device under test.

[0060] In this example, the electronic device under test includes a cloud computer or other electronic product. The test device is typically a PC device, such as a computer device, a U disk, or the like. The TypeC interface provided on the electronic device under test is a 24-pin TypeC interface that includes a DP1 pin, a DN1 pin, a DP2 pin, and a DN2 pin for transmitting a USB signal. The TypeC interface also includes an SBU1 pin for sending a serial port signal and an SBU2 pin for receiving a serial port signal.

[0061] In this example, the TypeA interface is connected to the first TypeC interface. During testing of the electronic device, when it is determined that the USB signal output by the electronic device under test needs to be transmitted to the test device (e.g., a U disk), the TypeC interface on the electronic device transmits the USB signal to the first TypeC interface. The first TypeC interface directly transmits the received USB signal to the TypeA interface, so that the TypeA interface transmits the USB signal output by the electronic device under test to the test device. Alternatively, during testing of the electronic device, when it is necessary to transmit the USB signal in the test device (e.g., a U disk) to the electronic device under test, the test device transmits the USB signal to the TypeA interface in the serial port connection board. The TypeA interface transmits the received USB signal to the first TypeC interface, and the first TypeC interface transmits the received USB signal to the TypeC interface of the electronic device under test, thereby completing direct transmission of the USB signal.

[0062] In the example, the serial port interface is connected with the first Type C interface. In the process of testing the electronic device, when it is determined that the serial port signal output by the electronic device under test needs to be directly transmitted to the test device, the Type C interface on the electronic device transmits the serial port signal to the first Type C interface, and the first Type C interface directly transmits the received serial port signal to the serial port interface, so that the serial port interface directly transmits the serial port signal output by the electronic device under test to the test device. Alternatively, in the process of testing the electronic device, when it is required to transmit the serial port signal in the test device to the electronic device under test, the test device transmits the serial port signal to the serial port interface in the serial port connection board, the serial port interface transmits the received serial port signal to the first Type C interface, and the first Type C interface transmits the received serial port signal to the Type C interface of the electronic device under test, thereby completing the direct transmission of the serial port signal.

[0063] In the embodiment, the serial port conversion circuit, the first Type C interface, the Micro USB interface, the Type A interface and the serial port interface are arranged in the same serial port connection board. The serial port conversion circuit is connected with the first Type C interface, and the serial port conversion circuit is connected with the Micro USB interface, so as to realize the serial port communication between the electronic device under test and the test device. The connection mode makes the serial port in the electronic device not need to be welded with a serial port pin, and also not need to be led out in the form of a test point. In the case of not damaging the appearance of the electronic device, the serial port communication between the electronic device under test and the test device is realized, and the reliability is high. In the same serial port connection board, the Micro USB interface, the Type A interface and the serial port interface are arranged, which are used to be connected with various test devices and transmit various forms of signals, so that the serial port connection board has strong compatibility. The serial port connection board in the embodiment can realize reliable and compatible communication of the electronic device under test without damaging the appearance of the electronic device in the process of testing the electronic device by the test device.

[0064] In an embodiment, as shown in Figure 2 and Figure 3 the serial port conversion circuit includes a serial port chip U1, a USB signal transmission unit 101 and an oscillation unit 102;

[0065] The TXD pin of the serial port chip U1 is connected with the SBU1 pin of the first Type C interface, and the RXD pin of the serial port chip U1 is connected with the SBU2 pin of the first Type C interface;

[0066] One end of the USB signal transmission unit 101 is connected with the serial port chip U1, and the other end of the USB signal transmission unit 101 is connected with the Micro USB interface;

[0067] The first end of the oscillation unit 102 is connected to the XI pin of the serial port chip U1, and the second end of the oscillation unit 102 is connected to the XO pin of the serial port chip U1.

[0068] As an example, such as Figure 2 The diagram shown is a circuit diagram of a serial port conversion circuit. Figure 3 The diagram shown is the circuit diagram of the first Type-C interface. Figure 2 and Figure 3 It is known that the RXD pin of the serial port chip U1 is connected to the SBU2 pin of the first Type-C interface. When the first Type-C interface receives a serial port signal from the electronic device under test, it transmits the serial port signal to the RXD pin of the serial port chip U1 via the SBU2 pin of the first Type-C interface. The serial port chip U1 then converts the serial port signal into a USB signal for transmission. One end of the USB signal transmission unit 101 is connected to the serial port chip U1, and the other end is connected to the MicroUSB interface. It transmits the USB signal generated by the serial port chip U1 to the MicroUSB interface, and then transmits the USB signal to the test device through the MicroUSB interface, thus realizing serial communication by converting serial port signals to USB signals. Figure 3 As can be seen, the SBU2 pin of the first Type-C interface is the RXD pin, which is used to receive the serial port signal output by the electronic device under test.

[0069] One end of the USB signal transmission unit 101 is connected to the serial port chip U1, and the other end is connected to the MicroUSB interface. When the MicroUSB interface receives a USB signal from the test device (PC), it transmits the USB signal to the USB signal transmission unit 101. The USB signal transmission unit 101 then transmits the USB signal to the serial port chip U1. The serial port chip U1 performs serial port signal conversion on the USB signal to obtain a converted serial port signal. The TXD pin of the serial port chip U1 is connected to the SBU1 pin of the first Type-C interface. After the serial port chip U1 performs serial port signal conversion on the received USB signal, it transmits the converted serial port signal to the first Type-C interface through the TXD pin of the serial port chip U1 and the SBU1 pin of the first Type-C interface. The first Type-C interface then transmits the serial port signal to the RXD pin of the Type-C interface on the electronic device under test through the SBU1 pin. This converts the USB signal from the test device into a serial port signal input to the electronic device under test, enabling serial communication between the test device and the electronic device under test. Figure 2 and Figure 3 As can be seen, the SBU1 pin of the first Type-C interface is the TXD pin, which is used to output the serial port signal converted by the serial port chip U1.

[0070] As an example, such as Figure 2 The first terminal XTAL1 of the oscillation unit 102 is connected to the XI pin of the serial port chip U1, and the second terminal XTAL2 of the oscillation unit 102 is connected to the XO pin of the serial port chip U1. The ground terminal of the oscillation unit 102 is grounded to provide a clock signal for the operation of the serial port chip U1.

[0071] In one embodiment, such as Figure 2 and Figure 4 As shown, the USB signal transmission unit 101 includes a first resistor R1 and a second resistor R2. One end of the first resistor R1 is connected to the UD+ pin of the serial port chip U1, and the other end of the first resistor R1 is connected to the D+ pin of the MicroUSB interface. One end of the second resistor R2 is connected to the UD- pin of the serial port chip U1, and the other end of the second resistor R2 is connected to the D- pin of the MicroUSB interface.

[0072] As an example, such as Figure 2 As shown, the USB signal transmission unit 101 includes a first resistor R1 and a second resistor R2. Figure 4 The diagram shows the circuit diagram of a MicroUSB interface. One end of the first resistor R1 is connected to the UD+ pin of the serial port chip U1, and the other end is connected to the D+ pin of the MicroUSB interface. One end of the second resistor R2 is connected to the UD- pin of the serial port chip U1, and the other end is connected to the D- pin of the MicroUSB interface. During the testing of electronic devices using testing equipment, the MicroUSB interface is often plugged and unplugged, which may generate static electricity. The first resistor R1 and the second resistor R2 are used to divide the voltage and reduce the impact of static electricity on the serial port chip U1, protecting the UD+ and UD- pins of the serial port chip U1. In this example, the first resistor R1 and the second resistor R2 can be 5.1KΩ.

[0073] like Figure 4As shown, the GND1 pin, the GND2 pin, the ID pin, the GND pin, the SHIELD1 pin, the SHIELD2 pin, the SHIELD3 pin and the SHIELD4 pin of the MicroUSB interface are all grounded. The VBUS pin of the MicroUSB interface is connected to the USB 5V power supply end of the connection board through the jumper box JP01-DM. The voltage of the USB 5V power supply end of the connection board is 5V. In this example, the USB 5V power supply end of the connection board can be connected to the power supply of the test equipment, or can be connected to a power adapter. The VBUS pin of the MicroUSB interface is grounded through the eighth capacitor C8 and the ninth capacitor C9, and the eighth capacitor C8 and the ninth capacitor C9 are connected in parallel, which is used to ensure that the voltage of the MicroUSB interface is stable at 5V, and ensure that the MicroUSB interface works normally. In this example, the eighth capacitor C8 can be 10uF, and the ninth capacitor C9 can be 100nF.

[0074] In this example, during the testing of the electronic device by the test equipment, if the serial port chip U1 converts the received serial port signal transmitted by the first TypeC interface, the UD- pin of the serial port chip U1 and the UD+ pin of the serial port chip U1 output the converted USB signal to the D- pin of the MicroUSB interface and the D+ pin of the MicroUSB interface, and transmit the USB signal to the MicroUSB interface. The MicroUSB interface transmits the received USB signal to the test equipment, realizing the serial port communication of converting the serial port signal into the USB signal. In addition, the UD+ pin of the serial port chip U1 is connected to the D+ pin of the MicroUSB interface, and the UD- pin of the serial port chip U1 is connected to the D- pin of the MicroUSB interface, which is also used to transmit the USB signal to the serial port chip U1 through the MicroUSB interface when the MicroUSB interface receives the USB signal transmitted by the test equipment. The USB signal is converted into a serial port signal by the serial port chip U1, and the converted serial port signal is transmitted to the TXD pin of the first TypeC interface through the TXD pin of the serial port chip U1. The serial port signal is transmitted to the RXD pin in the TypeC set in the electronic device under test through the TXD pin of the first TypeC interface, realizing the serial port communication of converting the USB signal into the serial port signal.

[0075] In an embodiment, as shown in Figure 2 The oscillation unit 102 includes a crystal oscillator XT01, a first capacitor C1 and a second capacitor C2.

[0076] The XTAL1 end of the crystal oscillator XT01 is connected to the XI pin of the serial port chip U1 and grounded through the first capacitor C1.

[0077] XTAL2 end of the crystal oscillator XT01 is connected with the XO pin of the serial port chip U1, and grounded through the second capacitor C2.

[0078] As an example, as shown in Figure 2 The oscillation unit 102 includes a crystal oscillator XT01, a first capacitor C1 and a second capacitor C2. One end of the first capacitor C1 is connected with the XTAL1 end of the crystal oscillator XT01, and the other end of the first capacitor C1 is grounded. One end of the second capacitor C2 is connected with the XTAL2 end of the crystal oscillator XT01, and the other end of the second capacitor C2 is grounded. The first capacitor C1 and the second capacitor C2 are used for voltage stabilization filtering processing of the oscillation unit 102, to guarantee the precision performance of the clock. In this example, the first capacitor C1 and the second capacitor C2 can be 20pF.

[0079] In an embodiment, as shown in Figure 2 The serial port conversion circuit further includes a third resistor R3 and a fourth resistor R4.

[0080] One end of the third resistor R3 is connected with the TXD pin of the serial port chip U1, and the other end of the third resistor R3 is connected with the chip power supply end VCC 3V3.

[0081] One end of the fourth resistor R4 is connected with the RXD pin of the serial port chip U1, and the other end of the fourth resistor R4 is connected with the chip power supply end VCC 3V3.

[0082] The chip power supply end VCC 3V3 is used for supplying power for the serial port chip U1.

[0083] As an example, as shown in Figure 2As shown, in the process of testing the electronic device by the test device, if the serial port chip U1 cannot provide sufficient voltage for the TXD pin, a pull-up resistor, i.e., the third resistor R3, is connected between the TXD pin of the serial port chip U1 and the chip power supply end VCC 3V3, for providing sufficient voltage for the TXD pin of the serial port chip U1. If the serial port chip U1 can provide sufficient voltage for the TXD pin, the third resistor R3 is disconnected, and the TXD pin of the serial port chip U1 does not need to be powered. If the serial port chip U1 cannot provide sufficient voltage for the RXD pin, a pull-up resistor, i.e., the fourth resistor R4, is connected between the RXD pin of the serial port chip U1 and the chip power supply end VCC 3V3, for providing sufficient voltage for the RXD pin of the serial port chip U1. If the serial port chip U1 can provide sufficient voltage for the RXD pin, the fourth resistor R4 is disconnected, and the RXD pin of the serial port chip U1 does not need to be powered. In the example, the voltage of the chip power supply end VCC 3V3 is 3.3V. Understandably, since the voltage required for stable operation of the serial port chip U1 is 3.3V, the chip power supply end VCC 3V3 is arranged to power the serial port chip U1, so as to ensure normal operation of the serial port chip U1. In the example, the third resistor R3 and the fourth resistor R4 can be 4.7KΩ, and the package size specification is 0.04 inch x 0.02 inch.

[0084] In the example, the VCC1 pin and the VCC2 pin of the serial port chip U1 are connected to the chip power supply end VCC 3V3, for obtaining a stable output of 3.3V voltage. Figure 2 As can be seen, one end of the eighth resistor R8 is connected to the V3 pin of the serial port chip U1, and the other end of the eighth resistor R8 is connected to the chip power supply end VCC 3V3, for ensuring that the V3 pin of the serial port chip U1 operates within a reasonable voltage range and ensures the safety performance of the serial port chip U1. In the example, the eighth resistor R8 is arranged between the chip power supply end VCC 3V3 and the V3 pin of the serial port chip U1, and the V3 pin of the serial port chip U1 is also grounded through the fifth capacitor C5, so as to ensure the voltage stability of the V3 pin of the serial port chip U1.

[0085] In the example, the VCC1 pin and the VCC2 pin of the serial port chip U1 are connected to the chip power supply end VCC 3V3, for obtaining a stable output of 3.3V voltage. Figure 2 As can be seen, the VCC1 pin and the VCC2 pin of the serial port chip U1 are connected to the chip power supply end VCC 3V3, for obtaining a stable output of 3.3V voltage. The VCC1 pin of the serial port chip U1 is grounded through the sixth capacitor C6, and the VCC2 pin is grounded through the seventh capacitor C7, so as to ensure the voltage stability of the VCC1 pin and the VCC2 pin of the serial port chip U1.

[0086] The TEN pin, the GND1 pin and the GND2 pin of the serial port chip U1 are all grounded, so as to ensure that the serial port chip U1 forms a loop and operates normally.

[0087] In an embodiment, as shown in Figure 5 the serial port conversion circuit includes a chip power supply unit 103;

[0088] The chip power supply unit 103 comprises a voltage stabilizer U2, a third capacitor C3 and a fourth capacitor C4;

[0089] The input end of the voltage stabilizer U2 is connected with the connection board power supply end USB 5V;

[0090] One end of the third capacitor C3 is connected with the output end of the voltage stabilizer U2, and the other end of the third capacitor C3 is grounded;

[0091] One end of the fourth capacitor C4 is connected with the output end of the voltage stabilizer U2, and the other end of the fourth capacitor C4 is grounded;

[0092] The output end of the voltage stabilizer U2 forms a chip power supply end VCC 3V3, which is used for supplying power for the serial port chip U1.

[0093] As an example, as shown in Figure 5 , a circuit diagram of the chip power supply unit 103. The chip power supply unit 103 comprises a voltage stabilizer U2, a first capacitor C1 and a second capacitor C2. The power supply input end VIN of the voltage stabilizer U2 is connected with the connection board power supply end USB 5V, wherein the connection board power supply end USB 5V can be set as a power adapter with a voltage of 5V. The ground end GND / ADJ of the voltage stabilizer U2 is grounded, the VOUT1 pin and the VOUT2 pin of the voltage stabilizer U2 are connected to form the output end of the voltage stabilizer U2, the output end of the voltage stabilizer U2 forms a chip power supply end VCC 3V3, which is used for supplying power for the serial port chip U1, at the same time, the output end of the voltage stabilizer U2 is grounded through the third capacitor C3 and the fourth capacitor C4, the third capacitor C3 and the fourth capacitor C4 are connected in parallel, which are used for stabilizing and filtering the voltage stabilizer U2, so as to make the voltage stabilizer U2 accurately reduce the 5V voltage output by the power adapter, so that the output end of the voltage stabilizer U2 forms a chip power supply end VCC 3V3 which stably outputs a voltage of 3.3V, and stably supplies power for the serial port chip U1, so as to ensure the stable work of the serial port chip U1.

[0094] In this embodiment, the chip power supply unit 103 reduces the high voltage of the connection board power supply end USB 5V, forms a chip power supply end VCC 3V3, which is used for outputting a voltage for ensuring the stable work of the serial port chip U1 in the serial port conversion circuit, and ensuring the normal and stable work of the serial port conversion circuit.

[0095] In an embodiment, as shown in Figure 6 , the serial port conversion circuit further comprises a chip working indication unit 104;

[0096] The chip working indication unit 104 includes a fifth resistor R5 and a light-emitting diode LED, one end of the fifth resistor R5 is connected with the chip power supply end VCC 3V3, the other end of the fifth resistor R5 is connected with the positive electrode of the light-emitting diode LED, and the negative electrode of the light-emitting diode LED is grounded.

[0097] As an example, as shown in Figure 6 , it is a circuit diagram of the chip working indication unit 104. The chip working indication unit 104 includes a fifth resistor R5 and a light-emitting diode LED, one end of the fifth resistor R5 is connected with the chip power supply end VCC 3V3, the other end of the fifth resistor R5 is connected with the positive electrode of the light-emitting diode LED, and the negative electrode of the light-emitting diode LED is grounded. When the chip power supply end VCC 3V3 of the chip power supply unit 103 stably outputs a voltage of 3.3V, the brightness of the light-emitting diode LED is within the normal brightness range, if the voltage output by the chip power supply end VCC 3V3 of the chip power supply unit 103 is higher than 3.3V, the brightness of the light-emitting diode LED is higher than the normal brightness range, if the voltage output by the chip power supply end VCC 3V3 of the chip power supply unit 103 is lower than 3.3V, the brightness of the light-emitting diode LED is lower than the normal brightness range, in this way, it is indicated whether the chip power supply end VCC 3V3 of the chip power supply unit 103 stably outputs a voltage of 3.3V, so as to timely adjust the voltage size output by the chip power supply end VCC 3V3 of the chip power supply unit 103, and guarantee the normal working of the serial port chip U1. In this example, the fifth resistor R5 can be 4.7KΩ, and the packaging size specification is 0.04 inch x 0.02 inch.

[0098] In an embodiment, as shown in Figure 3 and Figure 7 , the serial port connection board further includes a second TypeC interface; the second TypeC interface includes a sixth resistor R6 and a seventh resistor R7;

[0099] The CC1 pin of the second TypeC interface is connected with one end of the sixth resistor R6, and the other end of the sixth resistor R6 is grounded;

[0100] The CC2 pin of the second TypeC interface is connected with one end of the seventh resistor R7, and the other end of the seventh resistor R7 is grounded;

[0101] The VBUS1 pin, the VBUS2 pin, the VBUS3 pin and the VBUS4 pin of the second TypeC interface are connected with the connection board power supply end USB 5V;

[0102] The VBUS1 pin, the VBUS2 pin, the VBUS3 pin and the VBUS4 pin of the second TypeC interface are respectively connected with the VBUS1 pin, the VBUS2 pin, the VBUS3 pin and the VBUS4 pin of the first TypeC interface.

[0103] As an example, as shown in Figure 7 , it is a circuit diagram of the second Type-C interface. The VBUS1 pin, VBUS2 pin, VBUS3 pin and VBUS4 pin of the second Type-C interface form the connection board power supply end USB 5V for connecting an external power supply, and as shown in Figure 3 and Figure 7 , the VBUS1 pin, VBUS2 pin, VBUS3 pin and VBUS4 pin of the second Type-C interface are connected with the VBUS1 pin, VBUS2 pin, VBUS3 pin and VBUS4 pin of the first Type-C interface respectively, for powering the first Type-C interface. Understandably, since the first Type-C interface is used for signal transmission, it cannot provide a power supply interface, therefore, by setting the second Type-C interface to form the connection board power supply end USB 5V, an interface is provided for connecting an external power supply.

[0104] In this example, the CC1 pin of the second Type-C interface is connected with one end of the sixth resistor R6, the other end of the sixth resistor R6 is grounded, the CC2 pin of the second Type-C interface is connected with one end of the seventh resistor R7, the other end of the seventh resistor R7 is grounded, and the sixth resistor R6 and the seventh resistor R7 serve as pull-down resistors to ensure that the output voltage of the second Type-C interface is stable at a certain value. In this example, the sixth resistor R6 and the seventh resistor R7 are both 5.1KΩ, for ensuring that the output voltage of the second Type-C interface is stable at 5V, and ensuring that the serial port connection board works normally.

[0105] In an embodiment, as shown in Figure 3 , Figure 8 and Figure 9 , the TXD pin of the first Type-C interface is connected with the TXD pin of the serial port interface, and the RXD pin of the first Type-C interface is connected with the RXD pin of the serial port interface.

[0106] The DP1 pin and DP2 pin of the first Type-C interface are respectively connected with the D+ pin of the Type-A interface, and the DN1 pin and DN2 pin of the first Type-C interface are respectively connected with the D- pin of the Type-A interface.

[0107] As an example, as shown in Figure 8 , it is a circuit diagram of the serial port interface. When testing an electronic device, there are cases where the electronic device directly communicates with the test device through the serial port. In this case, the TXD pin of the first Type-C interface in Figure 3 is connected with the TXD pin of the serial port interface, for directly outputting the serial port signal output by the electronic device to the serial port interface, and outputting the serial port signal to the test device through the serial port interface. In this case, the RXD pin of the first Type-C interface in Figure 3The RXD pin of the first Type-C interface is connected to the RXD pin of the serial interface. It is used to receive the serial port signal of the test device through the serial port interface, transmit the serial port signal to the RXD pin of the first Type-C interface, and transmit the serial port signal to the electronic device under test through the RXD pin of the first Type-C interface, so as to realize serial communication.

[0108] As an example, such as Figure 9 The diagram shown is a circuit diagram of a Type-A interface. When testing electronic devices, there are situations where the electronic device and the test device communicate directly via USB. Figure 3 The DP1 and DP2 pins of the first Type-C interface are connected to the D+ pin of the Type-A interface, respectively, and the DN1 and DN2 pins of the first Type-C interface are connected to the D- pin of the Type-A interface, respectively. This is used to directly transmit USB signals from the first Type-C interface to the Type-A interface. The Type-A interface outputs the received USB signals directly to the test device. The Type-A interface can also transmit the received USB signals output by the test device to the first Type-C interface, and then transmit the USB signals to the electronic device under test through the first Type-C interface.

[0109] like Figure 9 As shown, the tenth capacitor C10 and the eleventh capacitor C11 are connected in parallel to form a parallel circuit. One end of the parallel circuit is connected to the VBUS pin of the Type A interface, and the other end is grounded to ensure voltage stability of the Type A interface. The GND pin, SHIELD1 pin, and SHIELD2 pin of the Type A interface are all grounded. In this example, the tenth capacitor C10 can be 10uF, and the eleventh capacitor C11 can be 100nF.

[0110] In this embodiment, serial communication is achieved by directly transmitting serial signals between the electronic device and the test device through a serial port interface connected to the first Type C interface, and by directly transmitting USB signals between the electronic device and the test device through a Type A interface connected to the first Type C interface, thus enhancing the compatibility of the serial port connection board.

[0111] In one embodiment, a cloud computer testing system is provided, including a serial port connection board, a cloud computer, and a testing device as described in the above embodiment. The first Type-C interface of the serial port connection board is used to connect to the cloud computer, and the MicroUSB interface, Type-A interface, and serial port interface of the serial port connection board are used to connect to the testing device.

[0112] When the electronic device under test is a cloud computer, the serial port connection board is used to connect the cloud computer and the test equipment. The cloud computer is tested through serial communication between the test equipment and the cloud computer.

[0113] In this embodiment, when the electronic device to be tested is a cloud computer, the cloud computer is provided with a 24-pin TypeC interface, which includes a DP1 pin, a DN1 pin, a DP2 pin and a DN2 pin, which are connected with the DP1 pin, the DN1 pin, the DP2 pin and the DN2 pin in the first TypeC interface of the serial port connection board respectively, for transmitting USB signals.

[0114] The 24-pin TypeC interface further includes an SBU1 pin and an SBU2 pin, the SBU1 pin in the 24-pin TypeC interface is connected with the SBU2 pin in the first TypeC interface of the serial port connection board, and the SBU2 pin in the 24-pin TypeC interface is connected with the SBU1 pin in the first TypeC interface of the serial port connection board, for transmitting serial port signals.

[0115] In this embodiment, the process of serial port communication from the cloud computer to the test device includes:

[0116] The cloud computer transmits serial port signals to the first TypeC interface through the SBU1 pin in the 24-pin TypeC interface and the SBU2 pin in the first TypeC interface, transmits the serial port signals to the RXD pin of the serial port chip U1 through the SBU2 pin in the first TypeC interface, converts the serial port signals to USB signals through the serial port chip U1, and transmits the converted USB signals to the MicroUSB interface through the UD+ pin and the UD- pin of the serial port chip U1 and the D+ pin and the D- pin of the MicroUSB interface, so that the MicroUSB interface transmits the USB signals to the test device, realizing serial port communication.

[0117] In this embodiment, the process of serial port communication from the test device to the cloud computer includes:

[0118] The test device is connected with the MicroUSB interface of the serial port connection board, transmits USB signals to the MicroUSB interface, transmits the USB signals to the serial port chip U1 through the D+ pin and the D- pin of the MicroUSB interface and the UD+ pin and the UD- pin of the serial port chip U1, converts the USB signals to serial port signals through the serial port chip U1, transmits the converted serial port signals to the first TypeC interface through the TXD pin of the serial port chip U1 and the SBU1 pin of the first TypeC interface, and the SBU1 pin of the first TypeC interface transmits the converted serial port signals to the cloud computer through the connection with the SBU2 pin in the 24-pin TypeC interface of the cloud computer, realizing serial port communication.

[0119] The cloud computer test system in the embodiment includes the serial port connecting plate in the above embodiment, the serial port conversion circuit, the first Type C interface, the Micro USB interface, the Type A interface and the serial port interface are arranged in the same serial port connecting plate, the serial port conversion circuit is connected with the first Type C interface, the serial port conversion circuit is connected with the Micro USB interface in a mode, serial port communication between the electronic device to be tested and the test equipment is realized. The connection mode makes the serial port in the electronic device not need to weld the serial port needle, and also not need to lead out in the form of test points, in the case of guaranteeing that the appearance of the electronic device is not damaged, the serial port communication between the electronic device to be tested and the test equipment is realized, and the reliability is higher. In the same serial port connecting plate, the Micro USB interface, the Type A interface and the serial port interface are arranged, which are used for being connected with various test equipment, transmitting various forms of signals, so that the serial port connecting plate has strong compatibility. The serial port connecting plate in the embodiment can guarantee that the electronic device to be tested is reliably and compatibly communicated without damaging the appearance of the electronic device in the process that the test equipment tests the electronic device.

[0120] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced by equivalents; the modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A serial connection board, characterized by, The serial port conversion circuit, the first Type-C interface, the Micro-USB interface, the Type-A interface and the serial port interface are arranged on the substrate; The serial port conversion circuit is connected with the first Type-C interface through a first connecting line and connected with the Micro-USB interface through a second connecting line; The first Type-C interface is connected with the Type-A interface through a third connecting line, and the first Type-C interface is connected with the serial port interface through a fourth connecting line.

2. The serial connection board of claim 1, wherein, The serial port conversion circuit comprises a serial port chip, a USB signal transmission unit and an oscillation unit; The TXD pin of the serial port chip is connected with the SBU1 pin of the first Type-C interface, and the RXD pin of the serial port chip is connected with the SBU2 pin of the first Type-C interface; One end of the USB signal transmission unit is connected with the serial port chip, and the other end of the USB signal transmission unit is connected with the Micro-USB interface; The first end of the oscillation unit is connected with the XI pin of the serial port chip, and the second end of the oscillation unit is connected with the XO pin of the serial port chip.

3. The serial connection board of claim 2, wherein, The USB signal transmission unit comprises a first resistor and a second resistor, one end of the first resistor is connected with the UD+ pin of the serial port chip, the other end of the first resistor is connected with the D+ pin of the Micro-USB interface, one end of the second resistor is connected with the UD- pin of the serial port chip, and the other end of the second resistor is connected with the D- pin of the Micro-USB interface.

4. The serial connection board of claim 2, wherein, The oscillation unit comprises a crystal oscillator, a first capacitor and a second capacitor; The XTAL1 end of the crystal oscillator is connected with the XI pin of the serial port chip and grounded through the first capacitor; The XTAL2 end of the crystal oscillator is connected with the XO pin of the serial port chip and grounded through the second capacitor.

5. The serial connection board of claim 2, wherein, The serial port conversion circuit further comprises a third resistor and a fourth resistor; One end of the third resistor is connected with the TXD pin of the serial port chip, and the other end of the third resistor is connected with a chip power supply end; One end of the fourth resistor is connected with the RXD pin of the serial port chip, and the other end of the fourth resistor is connected with the chip power supply end; The chip power supply end is used for supplying power for the serial port chip.

6. The serial connection board of claim 1, wherein, The serial port conversion circuit comprises a chip power supply unit; The chip power supply unit comprises a voltage stabilizer, a third capacitor and a fourth capacitor; The input end of the voltage stabilizer is connected with a connecting plate power supply end; One end of the third capacitor and the output end of the voltage stabilizer are connected, and the other end of the third capacitor is grounded; One end of the fourth capacitor and the output end of the voltage stabilizer are connected, and the other end of the fourth capacitor is grounded; The output end of the voltage stabilizer forms the chip power supply end and is used for supplying power for the serial port chip.

7. The serial connection board of claim 2, wherein, The serial port conversion circuit further comprises a chip working indication unit; The chip working indication unit comprises a fifth resistor and a light emitting diode, one end of the fifth resistor is connected with the chip power supply end, the other end of the fifth resistor is connected with the anode of the light emitting diode, and the cathode of the light emitting diode is grounded.

8. The serial connection board of claim 1, wherein, The serial port connecting board further comprises a second TypeC interface; the second TypeC interface comprises a sixth resistor and a seventh resistor; a CC1 pin of the second TypeC interface is connected with one end of the sixth resistor, and the other end of the sixth resistor is grounded; a CC2 pin of the second TypeC interface is connected with one end of the seventh resistor, and the other end of the seventh resistor is grounded; a VBUS1 pin, a VBUS2 pin, a VBUS3 pin and a VBUS4 pin of the second TypeC interface form a connecting board power supply end; the VBUS1 pin, the VBUS2 pin, the VBUS3 pin and the VBUS4 pin of the second TypeC interface are respectively connected with a VBUS1 pin, a VBUS2 pin, a VBUS3 pin and a VBUS4 pin of the first TypeC interface.

9. The serial connection board of claim 1, wherein, a TXD pin of the first TypeC interface is connected with a TXD pin of the serial port interface, and an RXD pin of the first TypeC interface is connected with an RXD pin of the serial port interface; a DP1 pin and a DP2 pin of the first TypeC interface are respectively connected with a D+ pin of the TypeA interface, and a DN1 pin and a DN2 pin of the first TypeC interface are respectively connected with a D- pin of the TypeA interface.

10. A cloud computer testing system, characterized by, The serial port connecting board, the cloud computer and the test equipment according to any one of claims 1 to 9, the first TypeC interface of the serial port connecting board is used for connecting the cloud computer, and the MicroUSB interface, the TypeA interface and the serial port interface of the serial port connecting board are used for being connected with the test equipment.

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