CN211979651U

CN211979651U - Mainboard debugging device

Info

Publication number: CN211979651U
Application number: CN202020515452.4U
Authority: CN
Inventors: 徐建平; 周文超; 叶继丰; 杨国军
Original assignee: Shenzhen Chuangzhicheng Technology Co ltd
Current assignee: Shenzhen Chuangzhicheng Technology Co ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-11-20
Anticipated expiration: 2030-04-09

Abstract

The utility model discloses a mainboard debugging device relates to mainboard debugging technical field. The device comprises a mainboard and a debugging jig; the mainboard comprises a UART module, a USB module, a control circuit and a first USB connector; the debugging jig comprises a second USB connector, a signal conversion module and a third USB connector. The utility model discloses a control circuit switches the UART module and the USB module of mainboard. When the debugging jig is connected, the control circuit is switched and connected to the UART module, the mainboard outputs UART signals and transmits the UART signals to the debugging jig through the first USB connector, the signal conversion module of the debugging jig converts the UART signals into USB signals and transmits the USB signals to the PC, and the PC is used for debugging the mainboard.

Description

Mainboard debugging device

Technical Field

The utility model belongs to the technical field of mainboard debugging technique and specifically relates to a mainboard debugging device is related to.

Background

Electronic products need to be debugged during design, and debugging interfaces comprise LPC, UART, I2C and the like. The UART is a common debugging interface, but due to product planning factors, many electronic products have no UART interface outside and cannot be debugged.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a mainboard debugging device can be debugged the mainboard of electronic product for the USB signal and then with the UART signal conversion.

An embodiment of the utility model provides a mainboard debugging device, including mainboard and debugging tool:

the mainboard comprises a UART module, a USB module, a control circuit and a first USB connector;

the UART module comprises a first RX receiving end and a first TX transmitting end;

the USB module comprises a D + signal end, a D-signal end and a VCC output end;

the first USB connector comprises a D + pin, a D-pin and a VCC input end;

the first RX receiving end and the D + signal end are connected with the D + pin through the control circuit, the first TX sending end and the D-signal end are connected with the D-pin through the control circuit, and the VCC output end is connected with the VCC input end through the control circuit;

the debugging jig comprises a second USB connector, a signal conversion module and a third USB connector;

the second USB connector comprises a second RX receiving end, a second TX transmitting end and an HS signal triggering end;

the second RX receiving end is connected with the D-pin, the second TX sending end is connected with the D-pin, and the HS signal triggering end is connected with the VCC input end;

the signal conversion module is used for converting the UART signal into a USB signal and then transmitting the USB signal to a PC through the third USB connector so as to debug the mainboard.

The utility model discloses mainboard debugging device has following beneficial effect at least:

and the UART module and the USB module of the mainboard are switched through the control circuit. When the debugging jig is connected, the control circuit is switched and connected to the UART module, the mainboard outputs UART signals and transmits the UART signals to the debugging jig through the first USB connector, the signal conversion module of the debugging jig converts the UART signals into USB signals and transmits the USB signals to the PC, and the PC is used for debugging the mainboard.

According to other embodiments of the present invention, the control circuit includes a first switching circuit and a second switching circuit;

the first TX transmitting terminal and the D-signal terminal are connected with the D-pin through the first switching circuit;

the first RX receiving end and the D + signal end are connected with the D + pin through the second switching circuit.

According to the utility model discloses a mainboard debugging device of other embodiments, the USB module still includes the GND output, first USB connector still includes the GND input, the GND output with the GND input is connected.

According to the utility model discloses a mainboard debugging device of other embodiments, first USB connector the second USB connector with the third USB connector is the USB2.0 interface.

Drawings

Fig. 1 is a schematic structural diagram of a motherboard debugging device in an embodiment of the present invention.

Detailed Description

The conception and the resulting technical effects of the present invention will be described clearly and completely with reference to the following embodiments, so that the objects, features and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.

In the description of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" to another feature, it can be directly disposed, secured, or connected to the other feature or indirectly disposed, secured, connected, or mounted to the other feature.

In the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.

The embodiment provides a mainboard debugging device, which comprises a mainboard and a debugging jig. Wherein:

the USB module comprises a D + signal end, a D-signal end and a VCC output end;

the first USB connector comprises a D + pin, a D-pin and a VCC input end;

the first RX receiving end and the D + signal end are connected with the D + pin through a control circuit, the first TX sending end and the D-signal end are connected with the D-pin through the control circuit, and the VCC output end is connected with the VCC input end through the control circuit;

the signal conversion module is used for converting the UART signal into a USB signal and then transmitting the USB signal to the PC through the third USB connector so as to debug the mainboard.

In some embodiments, the control circuit includes a first switching circuit and a second switching circuit;

the first TX transmitting end and the D-signal end are connected with the D-pin through a first switching circuit;

the first RX receiving end and the D + signal end are connected with the D + pin through a second switching circuit.

In some embodiments, the USB module further includes a GND output terminal, and the first USB connector further includes a GND input terminal connected to the GND output terminal.

Referring to fig. 1, a schematic structural diagram of a motherboard debugging apparatus in this embodiment is shown. As shown in fig. 1, the main board debugging device includes a main board and a debugging fixture.

The mainboard comprises a UART module, a USB module, a control circuit and a first USB connector. The UART module comprises an RX receiving end and a TX transmitting end, the USB module comprises a D + signal end, a D-signal end, a VCC output end and a GND output end, the control circuit comprises a first switching circuit and a second switching circuit, and the first USB connector comprises a D + pin, a D-pin, a VCC input end and a GND input end.

The debugging jig comprises a second USB connector, a signal conversion module and a third USB connector.

The module connection relationship of the motherboard, the module connection relationship of the debugging jig, and the connection relationship between the motherboard and the debugging jig are shown in fig. 1 in detail, and are not described herein.

The following explains the working principle of the motherboard debugging apparatus:

the main board debugging device in this embodiment adopts a multiplexing mode of USB signals and UART signals. Specifically, the method comprises the following steps:

when the mainboard normally works and the debugging jig is not connected, the D-signal end and the D + signal end of the USB module of the mainboard are connected to the D-pin and the D + pin of the first USB connector through the first switching circuit and the second switching circuit respectively, the VCC output end of the USB module of the mainboard is connected to the VCC input end of the first USB connector, the VCC input end is at a high level, and the USB module outputs a USB signal to the first USB connector. That is to say, when the motherboard normally works, the signal output by the first USB connector is not different from the normal USB signal.

When the mainboard needs to be debugged abnormally, the second USB connector of the debugging jig is connected with the first USB connector of the mainboard (the specific connection mode refers to the description), and the debugging jig can be accessed. At this moment, the HS signal trigger end of the debugging jig triggers the handshake signal, the VCC input end becomes low level, and then the trigger control circuit opens the connection between the UART module (RX receiving end and TX transmitting end) and the first USB connector (D + pin and D-pin), so that the UART module outputs the UART signal to the first USB connector. The first USB connector outputs the UART signal to a second USB connector of the debugging jig, the UART signal is converted into a USB signal through the signal conversion module, the USB signal is transmitted to the PC through the third USB connector, and the PC is used for debugging the mainboard.

In some embodiments, the first USB connector, the second USB connector, and the third USB connector are all USB2.0 interfaces.

In some embodiments, the motherboard is a motherboard of an electronic product.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. A mainboard debugging device is characterized by comprising a mainboard and a debugging jig;

the USB module comprises a D + signal end, a D-signal end and a VCC output end;

the first USB connector comprises a D + pin, a D-pin and a VCC input end;

2. The motherboard debugging device of claim 1, wherein the control circuit comprises a first switching circuit and a second switching circuit;

3. The motherboard debugging device of claim 2, wherein the USB module further comprises a GND output terminal, and the first USB connector further comprises a GND input terminal, and the GND output terminal is connected to the GND input terminal.

4. A motherboard debugging device according to any one of claims 1 to 3, wherein said first USB connector, said second USB connector and said third USB connector are USB2.0 interfaces.