CN215932613U

CN215932613U - Automatic switching circuit for debugging serial port of blade server

Info

Publication number: CN215932613U
Application number: CN202120148518.5U
Authority: CN
Inventors: 康万龙
Original assignee: Shenzhen Vclusters Information Technology Co ltd
Current assignee: Shenzhen Vclusters Information Technology Co ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2022-03-01
Anticipated expiration: 2031-01-19

Abstract

The utility model discloses an automatic switching circuit for a blade server debugging serial port, which comprises: the blade node board is provided with a UART alternative automatic switching circuit, a transceiver, a front panel adjusting serial connector and a backplane connector; the switching route of the UART alternative automatic switching circuit is 2, wherein one switching route is as follows: the UART alternative automatic switching circuit is electrically connected with the backplane connector and the external BMC control panel in sequence; the other switching route is as follows: the UART alternative automatic switching circuit is electrically connected with the transceiver and the front panel adjusting serial port connector in sequence, and the front panel adjusting serial port connector automatically switches control signals to the UART alternative automatic switching circuit. The utility model is suitable for a complete machine hardware system controlled and managed by multiple nodes or multiple board cards, so that technical service personnel can more conveniently and rapidly carry out product configuration, product maintenance and product fault location analysis on a client site, and the working efficiency is improved.

Description

Automatic switching circuit for debugging serial port of blade server

Technical Field

The utility model relates to the technical field of server debugging, in particular to an automatic switching circuit for a blade server debugging serial port.

Background

The existing blade server debugs the general solution of the serial port (refer to fig. 3): transmitting the debugging serial ports of the blade nodes to a BMC control board through a backboard; the BMC controller on the BMC control board can flexibly switch one path of the multi-path UART serial port to the BMC controller through the UART switcher (1-out-of-n switch chip); the BMC controller redirects one path of the gated serial port to an RS232 debugging serial port outside the case (used for local control and debugging) or an RJ45 management network port (used for remote control and debugging).

The disadvantages of such a design are: if the server fails, technical service personnel have to position the server on site, which is difficult, because the URT serial port can only be switched to one of the blade nodes at the same time, and the simultaneous monitoring cannot be realized; in addition, when a hardware fault occurs to cause that the serial port cannot communicate, the problem that the blade node is out of the blade node or the problem that the blade node is out of the backboard or the BMC control board cannot be quickly positioned.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides a blade server debugging serial port switching circuit which is suitable for a multi-node or multi-board card control management whole hardware system, so that technical service personnel can carry out on-site product configuration, product maintenance and product fault positioning analysis more conveniently, and the working efficiency is improved.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

the utility model provides a blade server debugging serial ports automatic switch-over circuit, includes: the blade node board is provided with a UART alternative automatic switching circuit, a transceiver, a front panel adjusting serial connector and a backplane connector; the switching route of the UART alternative automatic switching circuit is 2, wherein one switching route is as follows: the UART alternative automatic switching circuit is electrically connected with the backplane connector and the external BMC control panel in sequence; the other switching route is as follows: the UART alternative automatic switching circuit is electrically connected with the transceiver and the front panel adjusting serial port connector in sequence, and the front panel adjusting serial port connector automatically switches control signals to the UART alternative automatic switching circuit.

Preferably, the blade server debugging serial port automatic switching circuit further comprises a blade tangent point CPU, and the blade cutter CPU is electrically connected with a corresponding end of the UART alternative automatic switching circuit.

Preferably, the UART alternative automatic switching circuit includes a bus switch, and a corresponding end of the bus switch is connected to a debugging serial port of the blade tangent point CPU.

Preferably, the transceiver includes a transceiver circuit, which is configured as an RS232 interface chip and its peripheral circuits; and the RS232 interface chip is connected with an external power supply.

Preferably, the serial port connector comprises an RS232 serial port chip, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6 and a field-effect tube Q1; the RS232-TX serial port and the RS232-RX end of the RS232 serial port chip are correspondingly connected with the corresponding end of the RS232 interface chip through a resistor R1 and a resistor R2; the corresponding end of the RS232 serial port chip is respectively connected with one end of a resistor R6 and the grid electrode of a field effect transistor Q1 through a resistor R4; the drain electrode of the field effect transistor Q1 is respectively connected with one end of the resistor R3 and one end of the resistor R5, and the source electrode of the field effect transistor Q1 is grounded; the other ends of the resistor R3 and the resistor R6 are respectively connected with an external power supply; the other end of the resistor R5 is connected with the corresponding end of the bus switch.

Preferably, the RS232 serial port chip 5PIN is grounded, and when a serial port line is not inserted (in a normal working mode), the RS232 serial port chip automatically switches a control signal to pull up the 5PIN from a high level; when a serial port line is inserted (in-situ debugging mode), 5PIN is forcibly pulled to a low level by the serial port line; the bus switch gates the gating direction of the UART signal by detecting the high-low level of this control signal.

Preferably, the voltage of the external power supply is 3.3V.

By adopting the technical scheme of the utility model, the utility model has the following beneficial effects: the system is suitable for a whole hardware system controlled and managed by multiple nodes or multiple board cards, so that technical service personnel can carry out on-site product configuration, product maintenance and product fault positioning analysis of customers more conveniently, and the working efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the circuit of the present invention;

fig. 3 is a diagram of a prior art server debugging serial port module.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, a first feature "on" or "an over" a second feature unless expressly stated or limited otherwise

"under" may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact, but being in contact with each other through additional features between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 3, the present invention provides an automatic switching circuit for a blade server debugging serial port, including: the blade node board 1 is provided with a UART alternative automatic switching circuit 2, a transceiver 3, a front panel adjusting serial port connector 4 and a backplane connector 6 which are arranged on the blade node board 1; the switching route of the UART alternative automatic switching circuit 22 is 2, wherein one switching route is: the UART alternative automatic switching circuit is electrically connected with the backplane connector 6 and the external BMC control board in sequence; the other switching route is as follows: the UART alternative automatic switching circuit 2 is electrically connected with the transceiver 3 and the front panel adjusting serial port connector 4 in sequence, and the front panel adjusting serial port connector 4 automatically switches control signals to the UART alternative automatic switching circuit 2.

The automatic switching circuit for the blade server debugging serial port further comprises a blade point of contact CPU5, and the blade point of contact CPU5 is electrically connected with the corresponding end of the bus switcher.

The UART alternative automatic switching circuit 2 includes a bus switch, and the corresponding end of the bus switch is connected to the debugging serial port of the blade tangent point CPU 5.

The transceiver 3 includes a transceiver circuit, which is configured as an RS232 interface chip and its peripheral circuits.

The serial port connector 4 comprises an RS232 serial port chip, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6 and a field-effect tube Q1; the RS232-TX serial port and the RS232-RX end of the RS232 serial port chip are correspondingly connected with the corresponding end of the RS232 interface chip through a resistor R1 and a resistor R2; the corresponding end of the RS232 serial port chip is respectively connected with one end of a resistor R6 and the grid electrode of a field effect transistor Q1 through a resistor R4; the drain electrode of the field effect transistor Q1 is respectively connected with one end of the resistor R3 and one end of the resistor R5, and the source electrode of the field effect transistor Q1 is grounded; the other ends of the resistor R3 and the resistor R6 are respectively connected with an external power supply; the other end of the resistor R5 is connected with the corresponding end of the bus switch.

The voltage of the external power supply is 3.3V.

The RS232 serial port chip 5PIN is grounded, and when a serial port line is not inserted (in a normal working mode), the RS232 serial port chip automatically switches a control signal to pull up the 5PIN from a high level; when a serial port line is inserted (in-situ debugging mode), 5PIN is forcibly pulled to a low level by the serial port line; the bus switch gates the gating direction of the UART signal by detecting the high-low level of this control signal.

The working principle of the utility model is as follows:

under the condition that a serial port line is not inserted into the blade node front panel, the UART alternative automatic switching circuit 2 automatically switches to the backplane connector 6 and transmits the backplane connector to the BMC control panel; when the front panel of the blade node is inserted into a serial port line, the UART alternative automatic switching circuit 2 is automatically switched to a debugging serial port connector 4 of the front panel for transmission; the automatic switching control signal is realized by using a GND grounding signal of the serial port line, and when the serial port line is not inserted (in a normal working mode), the automatic switching control signal is pulled up from a high level; when a serial port line is inserted (in a field debugging mode), the automatic switching control signal is forcibly pulled to a low level by the serial port line; the UART alternative automatic switching circuit gates the gating direction of the UART signal by detecting the high and low levels of this control signal.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a blade server debugging serial ports automatic switch-over circuit which characterized in that includes: the blade node board is provided with a UART alternative automatic switching circuit, a transceiver, a front panel adjusting serial connector and a backplane connector; the switching route of the UART alternative automatic switching circuit is 2, wherein one switching route is as follows: the UART alternative automatic switching circuit is electrically connected with the backplane connector and the external BMC control panel in sequence; the other switching route is as follows: the UART alternative automatic switching circuit is electrically connected with the transceiver and the front panel adjusting serial port connector in sequence, and the front panel adjusting serial port connector automatically switches control signals to the UART alternative automatic switching circuit.

2. The automatic switching circuit for the debugging serial port of the blade server as claimed in claim 1, wherein the automatic switching circuit for the debugging serial port of the blade server further comprises a blade point-of-contact CPU, and the blade point-of-contact CPU is electrically connected with the corresponding end of the UART alternative automatic switching circuit.

3. The automatic switching circuit for the debugging serial port of the blade server as claimed in claim 2, wherein the UART alternative automatic switching circuit comprises a bus switch, and the corresponding end of the bus switch is connected with the debugging serial port of the blade tangent point CPU.

4. The automatic switching circuit for the debugging serial port of the blade server as claimed in claim 1, wherein the transceiver comprises a transceiver circuit, and the transceiver circuit is set as an RS232 interface chip and a peripheral circuit thereof; and the RS232 interface chip is connected with an external power supply.

5. The blade server debugging serial port automatic switching circuit of claim 4, wherein the serial port connector comprises an RS232 serial port chip, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6 and a field effect transistor Q1; the RS232-TX serial port and the RS232-RX end of the RS232 serial port chip are correspondingly connected with the corresponding end of the RS232 interface chip through a resistor R1 and a resistor R2; the corresponding end of the RS232 serial port chip is respectively connected with one end of a resistor R6 and the grid electrode of a field effect transistor Q1 through a resistor R4; the drain electrode of the field effect transistor Q1 is respectively connected with one end of the resistor R3 and one end of the resistor R5, and the source electrode of the field effect transistor Q1 is grounded; the other ends of the resistor R3 and the resistor R6 are respectively connected with an external power supply; the other end of the resistor R5 is connected with the corresponding end of the bus switch.

6. The automatic switching circuit for the debugging serial port of the blade server as claimed in claim 5, wherein the RS232 serial port chip is grounded with 5PIN, and when the serial port line is not inserted, the RS232 serial port chip automatically switches the control signal to pull up the 5PIN from high level; when the serial port line is inserted, the 5PIN is forcibly pulled to a low level by the serial port line; the bus switch gates the gating direction of the UART signal by detecting the high-low level of this control signal.

7. The automatic switching circuit for the debugging serial port of the blade server as claimed in claim 5, wherein the voltage of the external power supply is 3.3V.