WO2016101408A1 - 服务器串口切换装置及方法、服务器 - Google Patents

服务器串口切换装置及方法、服务器 Download PDF

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Publication number
WO2016101408A1
WO2016101408A1 PCT/CN2015/073250 CN2015073250W WO2016101408A1 WO 2016101408 A1 WO2016101408 A1 WO 2016101408A1 CN 2015073250 W CN2015073250 W CN 2015073250W WO 2016101408 A1 WO2016101408 A1 WO 2016101408A1
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Prior art keywords
signal
serial port
state
switch
interface
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PCT/CN2015/073250
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English (en)
French (fr)
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田海东
徐东
何志刚
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中兴通讯股份有限公司
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Publication of WO2016101408A1 publication Critical patent/WO2016101408A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus

Definitions

  • the present invention relates to the field of communication, in particular to a server serial port switching device and method, and a server.
  • a server usually consists of two parts: a system part responsible for business processing, and a BMC (Baseboard Management Controller) part.
  • the BMC as the management unit of the server, is responsible for managing and monitoring the system part of the server.
  • the serial port is the most basic information interaction interface. Both the system part and the BMC part need to use the serial port to output the underlying operating status information.
  • the serial port is also needed to input debugging commands to view detailed debugging information for convenience Troubleshooting, so both the system serial port and the BMC serial port are necessary. Considering the convenience of operation, it is best to transport the two serial ports to the panel so that they can be used directly without opening the cover.
  • the main method of realizing server serial port sharing is to use a single-pole double-throw switch, and then cooperate with the button to switch to select whether to connect the system serial port or the BMC serial port to the panel interface, and the received signal of the two serial ports does not participate in the switch.
  • the default system The receiving signal of the serial port is connected to the panel interface.
  • this method requires people to go to the site and press the switch button on the board to complete when switching the serial port. It is very troublesome to operate.
  • the receiving signal of the BMC serial port cannot be connected to the panel interface, the BMC serial port cannot support information interaction. , Only output information does not support input information.
  • the embodiment of the present invention provides a server serial port switching device and method, and a server to simplify the cumbersome operation of switching between the system serial port and the connection state of the BMC serial port and the panel interface by means of physical buttons, and can support the BMC serial port Obtain user input information through the panel interface.
  • a server serial port switching device including: a panel interface, a baseboard management controller (BMC) serial port, a system serial port, a conduction selection switch, and a switching control module, wherein the BMC
  • the serial port has a first signal sending end, and the system serial port has a second signal sending end;
  • the panel interface is set on the panel of the server and has a third signal sending end;
  • the first signal sending end and the second signal sending end are switched on through the selection switch Connected to the third signal sending end, where the first signal sending end is selected through conduction To
  • the select switch is connected to the third signal sending end and the signal is in the first state, the second signal sending end is connected to the third signal sending end through the conduction selector switch, and the signal is in the second state;
  • switching control The module located in the BMC, is set to control the conduction selector switch to switch between the first state and the second state according to the switching instruction.
  • the above-mentioned device further includes: an on switch; the BMC serial port has a first signal receiving end, the system serial port has a second signal receiving end, and the panel interface has a third signal receiving end; the first signal receiving end and the third signal receiving end Connected; the second signal receiving end is connected to the third signal receiving end through the conduction switch, the state of the signal disconnection is the third state, and the state of the signal conduction is the fourth state; the switching control module is set to control according to the switching instruction The conduction switch switches between the third state and the fourth state.
  • the default conduction state of the server is the first state and the third state; when the server needs to use the system serial port, the switching instruction is: switch from the first state to the second state, and switch from the third state to the second state Four states.
  • the switching control module is connected to the third signal receiving terminal through the first signal receiving terminal, and is further configured to monitor all characters input by the user to the third signal receiving terminal to obtain the switching instruction.
  • the above device further includes: a level conversion chip configured to perform level conversion on the signal transmitted between the BMC serial port/system serial port and the panel interface, so that the converted signal level conforms to the BMC serial port, system serial port, and panel interface The interface standard.
  • a level conversion chip configured to perform level conversion on the signal transmitted between the BMC serial port/system serial port and the panel interface, so that the converted signal level conforms to the BMC serial port, system serial port, and panel interface The interface standard.
  • the level conversion chip has a universal asynchronous receiver/transmitter (UART) interface and an RS232 interface;
  • the UART interface includes: a first UART interface set to transmit and send signals and a second UART interface set to transmit and receive signals, where the first A UART interface is connected to the first signal transmitting terminal and the second signal transmitting terminal through the conduction selection switch, the second UART interface is connected to the first signal receiving terminal and is connected to the second signal receiving terminal through the conduction switch;
  • the RS232 interface includes : A first RS232 interface set to transmit and receive signals and a second RS232 interface set to transmit and receive signals, wherein the first RS232 interface is connected to the third signal sending end, and the second RS232 interface is connected to the third signal receiving end.
  • the signal level amplitude range of the first UART interface and the second UART interface is (0V, 3.3V); the signal level amplitude range of the first RS232 interface and the second RS232 interface is (-15V-15V) ;
  • Conduction selection switches include: single-pole double-throw (SPDT) switches, where SPDT switches include: analog switch chips that comply with SPDT specifications; conduction switches include: single-pole single-throw (SPST) switches, where SPST switches include: SPST-compliant Specification of analog switch chip; panel interface is located on the front panel or back panel of the server; panel interface is RJ45 socket or DB9 socket.
  • SPDT single-pole double-throw
  • SPST single-pole single-throw
  • a server including: the above-mentioned server serial port switching device.
  • a server serial port switching method which is applied in a server where the connection state between the baseboard management controller (BMC) serial port and the system serial port and the panel interface needs to be switched
  • the server includes : The panel interface, BMC serial port, system serial port, conduction selection switch, and switch control module located on the BMC set on the server panel, where the BMC serial port has the first signal sending end, and the system serial port has the second signal
  • the transmitting terminal, the panel interface has a third signal transmitting terminal; the first signal transmitting terminal and the second signal transmitting terminal are connected to the third signal transmitting terminal through the conduction selection switch, and the first signal transmitting terminal is connected to the third signal transmitting terminal through the conduction selection switch.
  • the state where the three signal sending ends are connected and the signal is turned on is the first state, the second signal sending end is connected to the third signal sending end through the conduction selection switch and the state where the signal is turned on is the second state;
  • the server serial port switching method includes : The switching control module monitors all characters input by the user to the third signal receiving terminal through the first signal receiving terminal, and obtains the switching instruction; the switching control module controls the conduction selection switch between the first state and the second state according to the switching instruction To switch.
  • the server further includes: an on switch; the BMC serial port has a first signal receiving end, the system serial port has a second signal receiving end, and the panel interface has a third signal receiving end; the first signal receiving end is connected to the third signal receiving end The second signal receiving end is connected to the third signal receiving end through a conduction switch, the signal is disconnected in the third state, and the signal is in the fourth state; the server serial port switching method also includes: switching the control module according to The switching command controls the on-switch to switch between the third state and the fourth state.
  • the server serial port switching device and method, and the server of the present invention can directly use serial port commands to switch without manual on-site operation, easy to use, no need for the server to provide additional physical switching buttons, simple implementation, and BMC Both the serial port and the system can support information input.
  • Fig. 1 is a schematic structural diagram of a server serial port switching device according to an embodiment of the present invention
  • Fig. 2 is a schematic diagram of the structure of a server according to an embodiment of the present invention.
  • Fig. 3 is a structural block diagram of a server serial port switching device according to a preferred embodiment of the present invention.
  • Fig. 4 is a schematic diagram of a server serial port switching process according to a preferred embodiment of the present invention.
  • Fig. 1 is a schematic structural diagram of a server serial port switching device according to an embodiment of the present invention.
  • the device may include: a panel interface, a baseboard management controller (BMC) serial port, a system serial port, a conduction selection switch, and a switching control Module, where:
  • BMC baseboard management controller
  • the BMC serial port has a first signal sending end, and the system serial port has a second signal sending end;
  • the panel interface is set on the panel of the server and has a third signal sending end;
  • the first signal sending end and the second signal sending end are connected to the third signal sending end through the conduction selection switch, wherein the first signal sending end is connected to the third signal sending end through the conduction selection switch, and the signal is turned on.
  • the second signal sending end is connected to the third signal sending end through the conduction selection switch and the signal is in the second state;
  • the switching control module located in the BMC, is configured to control the conduction selection switch to switch between the first state and the second state according to the switching instruction.
  • the device shown in FIG. 1 can simplify the cumbersome operation of switching between the system serial port and the connection state of the BMC serial port and the panel interface by setting the switch button in the prior art, and avoid the waste of human resources caused by manual on-site operation.
  • the device shown in FIG. 1 may further include (not described here with reference to the accompanying drawings):
  • the BMC serial port has a first signal receiving end, the system serial port has a second signal receiving end, and the panel interface has a third signal receiving end;
  • the first signal receiving end is connected to the third signal receiving end;
  • the second signal receiving end is connected to the third signal receiving end through the conduction switch, the state of signal disconnection is the third state, and the state of signal conduction is the fourth state;
  • the switching control module is configured to control the conduction switch to switch between the third state and the fourth state according to the switching instruction.
  • the default conduction state of the server may be the first state and the third state; in the case that the server needs to use the system serial port, the switching instruction may be: switching from the first state to the second state Two states, and switch from the third state to the fourth state.
  • the signal sending end of the BMC serial port is connected to the signal sending end of the panel interface through the conduction selection switch, and the signal receiving end of the BMC serial port is directly connected to the signal receiving of the panel.
  • the signal receiving end of the system serial port is also connected to the panel interface through the conduction switch.
  • the conduction switch has two states of on and off, and the default state is that the conduction switch is in the off state, therefore, When you need to use the system serial port, use the conduction selector switch to disconnect the conduction state between the signal sending end of the BMC and the signal sending end of the panel interface, and open the signal sending end of the system serial port and the signal sending end of the panel interface.
  • the conduction selector switch is turned on, the signal receiving end of the system serial port and the signal receiving end of the panel interface are naturally turned on.
  • the switching control module may be connected to the third signal receiving terminal through the first signal receiving terminal, and may also be configured to monitor all characters input by the user to the third signal receiving terminal to obtain the switching instruction.
  • the switching control module can control the conduction state of the conduction selector switch or conduction switch to control the switching between the first, second, third, and fourth states.
  • the server serial port switching device may further include: a level conversion chip configured to perform level conversion on the signal transmitted between the BMC serial port/system serial port and the panel interface, so that the converted signal level conforms to the BMC The interface standard of serial port, system serial port and panel interface.
  • the level conversion chip has a universal asynchronous receiver transmitter (UART) interface and an RS232 interface;
  • the UART interface includes: a first UART interface set to transmit and send signals and a second UART interface set to transmit and receive signals, where the first A UART interface is connected to the first signal transmitting terminal and the second signal transmitting terminal through the conduction selection switch, the second UART interface is connected to the first signal receiving terminal and is connected to the second signal receiving terminal through the conduction switch;
  • the RS232 interface includes : A first RS232 interface set to transmit and receive signals and a second RS232 interface set to transmit and receive signals, wherein the first RS232 interface is connected to the third signal sending end, and the second RS232 interface is connected to the third signal receiving end.
  • the signal level amplitude range of the first UART interface and the second UART interface is (0V, 3.3V); the signal level amplitude range of the first RS232 interface and the second RS232 interface is (-15V-15V) ;
  • Conduction selection To Switches include: single-pole double-throw (SPDT) switches, where SPDT switches include: analog switch chips that meet SPDT specifications; turn-on switches include: single-pole single-throw (SPST) switches, where SPST switches include: analog switches that meet SPST specifications Chip;
  • SPDT single-pole double-throw
  • SPST single-throw
  • SPST switches include: analog switches that meet SPST specifications Chip;
  • the panel interface is located on the front panel or back panel of the server; the panel interface is RJ45 socket or DB9 socket.
  • FIG. 2 is a schematic structural diagram of a server according to an embodiment of the present invention.
  • the server includes the aforementioned server serial port switching device. Since the foregoing embodiment has described the server serial port switching device in detail, the structural parts of the server related to the server serial port switching device will not be repeated here.
  • the embodiment of the present invention also provides a server serial port switching method, which is applied to the server and requires a connection between the baseboard management controller (BMC) serial port and the system serial port and the panel interface.
  • BMC baseboard management controller
  • connection state is switched between the connection states
  • the server on which the method runs includes: a panel interface set on the panel of the server, a BMC serial port of a baseboard management controller, a system serial port, a conduction selection switch, and a switching control module located in the BMC, Among them, the BMC serial port has a first signal sending end, the system serial port has a second signal sending end, and the panel interface has a third signal sending end; the first signal sending end and the second signal sending end are connected with the third signal through the conduction selector switch.
  • the server serial port switching method includes:
  • the switching control module monitors all characters input by the user to the third signal receiving terminal through the first signal receiving terminal, and obtains the switching instruction; the switching control module controls the conduction selection switch to perform between the first state and the second state according to the switching instruction Switch.
  • the server may further include: an on switch; the BMC serial port has a first signal receiving end, the system serial port has a second signal receiving end, and the panel interface has a third signal receiving end; the first signal receiving end and the third signal receiving end Connected; the second signal receiving end is connected to the third signal receiving end through a conduction switch, the state of signal disconnection is the third state, and the state of signal conduction is the fourth state;
  • the server serial port switching method can also be include:
  • the switching control module controls the on-switch to switch between the third state and the fourth state according to the switching instruction.
  • the embodiment of the present invention realizes a simple and convenient method of serial port sharing, solves the problem that the server cannot output the panel interface for the system serial port and the BMC serial port at the same time, and especially overcomes the need to provide additional switching buttons, troublesome operation, and operation in the prior art.
  • the BMC serial port does not support input.
  • server serial port switching device provided by the foregoing embodiment in conjunction with FIG. 3 and FIG. 4 and a preferred embodiment.
  • the idea of solving the above-mentioned technical problems in this preferred embodiment is: (1) The signal sent from the panel interface is connected to the system serial port and the BMC serial port through a single-pole double-throw switch to realize the selection and switching of the two sending signals, and the input signal of the panel interface It is directly connected to the BMC serial port and also connected to the system serial port via a single-pole single-throw switch, so that both serial ports can support input. (2) When using the panel interface on the BMC serial port, you need to disconnect the system serial port through the single-pole single-throw switch to avoid inputting wrong commands to the system. During the entire use process, the BMC switching module always maintains the monitoring of the serial port input. When the serial port switching command is recognized, the BMC switching module automatically operates the single-pole double-throw switch and the selection end of the single-pole single-throw switch to switch the serial port.
  • this preferred embodiment mainly provides such a technical solution: the SPDT switch is initially switched to the BMC serial port transmitter by default, the SPDT switch is in the off state, and the BMC serial port uses the panel interface.
  • the SPDT switch is initially switched to the BMC serial port transmitter by default, the SPDT switch is in the off state, and the BMC serial port uses the panel interface.
  • the BMC switching module After the BMC switching module recognizes the command, it switches the signal sent from the panel interface to the system serial port by controlling the signal state of the single-pole double-throw switch selection terminal, and at the same time, the single-pole single Throw the switch to connect the receiving signal of the panel interface to the system serial port, and the system serial port uses the panel interface, but the BMC serial port always keeps monitoring the input signal of the panel interface; when the user needs to switch back to using the BMC serial port, use the BMC serial port again.
  • the BMC switching module After the BMC switching module recognizes the command, it controls the signal state of the single-pole double-throw switch selection terminal, switches the signal sent from the panel interface to the BMC serial port, and disconnects the system through the single-pole single-throw switch
  • the terminal serial port input signal is connected with the panel interface, so the panel interface is used by the BMC serial port, and the operation can be repeated in the following steps.
  • FIG. 3 is a structural block diagram of a server serial port switching device according to a preferred embodiment of the present invention.
  • the server serial port sharing device provided by the embodiment of the present invention mainly includes: a panel interface , Level conversion chip, single-pole double-throw switch, single-pole single-throw switch, BMC serial port, system serial port and BMC switching module, the specific instructions are as follows:
  • the panel interface located on the front panel or back panel of the server, is set to provide an external serial port connection interface, specifically to provide the external connection of serial TX (transmit) and RX (receive) signals. According to needs, you can use a small space RJ45 socket or Implementation of a more general DB9 socket.
  • Level conversion chip because the system serial port and BMC serial port conform to UART (Universal Asynchronous Receiver and Transmitter, Universal Asynchronous Receiver and Transmitter) interface standards (where the signal level amplitude is generally between 0V and 3.3V), the panel interface is external
  • the connected serial signal must conform to the RS232 interface standard (among which, the signal level amplitude is between -15V and 15V). These two interface standard signals are not directly compatible, so they need to be adopted.
  • To The level conversion chip is used to realize the signal conversion between the two interface standards.
  • the TX signal on the UART interface side of the chip is connected to pin 3 of the SPDT switch, and the RX signal on the UART interface side is directly connected to the RX signal of the BMC serial port, and at the same time connected to pin 2 of the SPDT switch.
  • TX and RX signals on the RS232 interface side of the chip are respectively connected to the TX and RX signals on the panel interface.
  • the level conversion chip can be ADM3202 of ADI, of course, a chip with similar functions can also be selected, as long as it can realize the signal conversion between the UART interface standard and the RS232 interface standard.
  • the single-pole double-throw switch can realize the switching selection of the serial port sending signal. It is set as the connection between the control panel interface sending signal and the system serial port and the BMC serial port sending signal. As shown in Figure 3, the 3-pin is connected to the UART interface side of the level conversion chip. For TX signal, pin 1 is connected to the TX signal of the system serial port, pin 2 is connected to the TX signal of the BMC serial port, and the S selection pin is connected to the SWT signal controlled by the BMC.
  • an analog switch chip with SPDT (single pole dual throw) specifications can be used for implementation.
  • the single-pole single-throw switch can realize the connection control of the system serial port receiving signal. It is set to disconnect the system serial port receiving signal from the panel interface when the BMC serial port uses the panel interface to avoid inputting wrong commands to the system during the use of the BMC serial port.
  • pin 2 is connected to the RX signal on the UART interface side of the level conversion chip
  • pin 1 is connected to the RX signal of the system serial port
  • the S selection pin is connected to the SWT signal controlled by the BMC. It can be implemented with SPST (single pole single throw) analog switch chip.
  • the BMC serial port that is, the UART interface provided by the BMC, is set to output the operating status information of the BMC, and at the same time supports user input to realize information interaction.
  • the system serial port that is, the UART interface provided by the system, is set to output the operating status information of the system, and at the same time supports user input to realize information interaction.
  • the BMC switch module is set to monitor the input characters of the BMC serial port. When the switch command is recognized, the serial port switch operation is automatically implemented. In practical applications, the BMC switch module can be implemented by software coding. The specific functions include input characters to the BMC serial port Carry out real-time monitoring. When the switching instruction is recognized, the state of the external switch is automatically controlled by flipping the SWT signal level, and the serial port switching operation is implemented.
  • Fig. 4 is a schematic diagram of a server serial port switching process according to a preferred embodiment of the present invention. As shown in Fig. 4, the process includes the following steps:
  • Step S401 By default, the SPDT switch is switched to the BMC serial port transmitting end, the SPDT switch is disconnected, and the BMC serial port uses the panel interface.
  • Step S402. When the user needs to use the system serial port, input the serial port switching command in the serial port. After the BMC switching module recognizes the command, it controls the signal state of the single-pole double-throw switch selection terminal through the SWT signal, and connects the sending signal of the panel interface to the system serial port , And synchronously turn on the single-pole single-throw switch by the SWT signal, connect the receiving signal of the panel interface to the system serial port, and use the panel interface by the system serial port.
  • Step S403 When the system serial port uses the panel interface, the panel interface RX signal continues to be connected to the BMC serial port, and the BMC switching module keeps monitoring the input characters of the panel interface.
  • Step S404 When the user needs to switch back to using the BMC serial port, enter the serial port switch command again in the serial port.
  • the BMC switch module After the BMC switch module recognizes the command, it controls the signal state of the single-pole double-throw selection terminal through the SWT signal, and connects the sending signal of the panel interface to BMC serial port, and synchronously disconnect the single-pole single-throw switch by the SWT signal, and restore the panel interface to be used by the BMC serial port.
  • the preferred embodiment can directly use the serial port command to switch without manual on-site operation, which is convenient to use, and does not require the server to additionally provide a switch button, which is simple to implement, and both serial ports can support input.
  • the shared serial port switching operation can be implemented by inputting the serial port command, which completely solves the defects of the prior art and provides the serial port of the server system.
  • the BMC serial port shares a panel interface to provide a simple and easy-to-use solution.
  • the invention provides an important basis for the design of the server.
  • serial port commands can be used to switch directly without manual on-site operation, easy to use, and no need for the server to provide additional physical switching buttons.
  • Simple, and the BMC serial port and the system can support information input.

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Abstract

本发明公开了一种服务器串口切换装置及方法、服务器。其中，该服务器串口切换装置包括：设置在服务器上具有第三信号发送端的面板接口、具有第一信号发送端的BMC串口、具有第二信号发送端的系统串口、导通选择开关以及位于BMC的切换控制模块，其中，第一信号发送端通过导通选择开关与第三信号发送端连接且信号导通的状态为第一状态，第二信号发送端通过导通选择开关与第三信号发送端连接且信号导通的状态为第二状态；切换控制模块，设置为根据切换指令，控制导通选择开关在第一状态和第二状态之间进行切换。通过本发明，解决了现有技术设置切换按钮进行BMC串口和系统串口带来的麻烦操作，以及BMC串口不支持信息输入的缺陷。

Description

服务器串口切换装置及方法、服务器 技术领域
本发明涉及通信领域，尤其是涉及一种服务器串口切换装置及方法、服务器。
背景技术
服务器通常由两个部分组成：负责业务处理的系统部分，以及BMC(Baseboard Management Controller，基板管理控制器)部分，其中，BMC作为服务器的管理单元，负责实现对服务器的系统部分进行管理和监控。串口是最基本的信息交互接口，系统部分和BMC部分都需要使用串口来输出底层的运行状态信息，同时在维护排查故障过程中，也需要借助串口来输入调试命令，查看详细的调试信息以方便故障排查，所以系统串口和BMC串口都有存在的必要。考虑到操作的方便性，两个串口最好都能输送到面板上，这样无需打开机盖即可直接使用，但在服务器组件高度集成、外出接口密集的今天，服务器面板的空间非常有限，无法同时为系统串口和BMC串口提供面板接口，此时就需要考虑让系统串口和BMC串口共用一个面板接口。
目前，实现服务器串口共用的方法主要是采用单刀双掷开关，然后配合按键来切换选择是将系统串口还是BMC串口的发送信号连接到面板接口，而两种串口的接收信号不参与切换，默认系统串口的接收信号连接到面板接口。但是，这种方法在切换串口时必须要人到现场按单板上的切换按钮才能完成，操作起来很麻烦，而且，因为BMC串口的接收信号无法连接到面板接口，导致BMC串口无法支持信息交互，只能输出信息不支持输入信息。
发明内容
本发明实施例提供了一种服务器串口切换装置及方法、服务器，以简化通过物理按键的方式在系统串口和BMC串口与面板接口的连接状态之间进行切换产生的繁琐操作，且能够支持BMC串口通过面板接口获得用户的输入信息。
为了达到上述目的，根据本发明的一个方面，提供了一种服务器串口切换装置，包括：面板接口、基板管理控制器(BMC)串口、系统串口、导通选择开关以及切换控制模块，其中，BMC串口具有第一信号发送端，系统串口具有第二信号发送端；面板接口，设置在服务器的面板上，具有第三信号发送端；第一信号发送端和第二信号发送端通过导通选择开关与第三信号发送端连接，其中，第一信号发送端通过导通选 择开关与第三信号发送端连接且信号导通的状态为第一状态，第二信号发送端通过导通选择开关与第三信号发送端连接且信号导通的状态为第二状态；切换控制模块，位于BMC，设置为根据切换指令，控制导通选择开关在第一状态和第二状态之间进行切换。
优选地，上述装置还包括：导通开关；BMC串口具有第一信号接收端，系统串口具有第二信号接收端，面板接口具有第三信号接收端；第一信号接收端与第三信号接收端连接；第二信号接收端通过导通开关与第三信号接收端连接，信号断开的状态为第三状态，信号导通的状态为第四状态；切换控制模块，设置为根据切换指令，控制导通开关在第三状态和第四状态之间进行切换。
优选地，服务器默认的导通状态为第一状态和第三状态；在服务器需要使用系统串口的情况下，切换指令为：从第一状态切换到第二状态，且从第三状态切换到第四状态。
优选地，切换控制模块，通过第一信号接收端与第三信号接收端连接，还设置为对用户输入到第三信号接收端的所有字符进行监测，获取切换指令。
优选地，上述装置还包括：电平转换芯片，设置为对BMC串口/系统串口与面板接口之间传输的信号进行电平转换，使得转换后的信号电平符合BMC串口、系统串口以及面板接口的接口标准。
优选地，电平转换芯片具有通用异步收发传输器(UART)接口和RS232接口；UART接口包括：设置为传输发送信号的第一UART接口和设置为传输接收信号的第二UART接口，其中，第一UART接口通过导通选择开关与第一信号发送端和第二信号发送端连接，第二UART接口与第一信号接收端连接且通过上述导通开关与第二信号接收端连接；RS232接口包括：设置为传输发送信号的第一RS232接口和设置为传输接收信号的第二RS232接口，其中，第一RS232接口与第三信号发送端连接，第二RS232接口与第三信号接收端连接。
优选地，第一UART接口和第二UART接口的信号电平幅值范围为(0V，3.3V)；第一RS232接口和第二RS232接口的信号电平幅值范围为(－15V-15V)；导通选择开关包括：单刀双掷(SPDT)开关，其中，SPDT开关包括：符合SPDT规格的模拟开关芯片；导通开关包括：单刀单掷(SPST)开关，其中，SPST开关包括：符合SPST规格的模拟开关芯片；面板接口位于服务器的前端面板或后端面板上；面板接口为RJ45插座或DB9插座。
根据本发明的另一个方面，还提供了一种服务器，包括：上述服务器串口切换装置。
根据本发明的又一个方面，还提供了一种服务器串口切换方法，应用于服务器中需要对基板管理控制器(BMC)串口和系统串口与面板接口之间的连接状态进行切换的场景，服务器包括：设置在服务器的面板上的面板接口、基板管理控制器BMC串口、系统串口、导通选择开关以及位于BMC的切换控制模块，其中，BMC串口具有第一信号发送端，系统串口具有第二信号发送端，面板接口具有第三信号发送端；第一信号发送端和第二信号发送端通过导通选择开关与第三信号发送端连接，其中，第一信号发送端通过导通选择开关与第三信号发送端连接且信号导通的状态为第一状态，第二信号发送端通过导通选择开关与第三信号发送端连接且信号导通的状态为第二状态；该服务器串口切换方法包括：切换控制模块通过第一信号接收端对用户输入到第三信号接收端的所有字符进行监测，获取切换指令；切换控制模块根据切换指令，控制导通选择开关在第一状态和第二状态之间进行切换。
优选地，服务器还包括：导通开关；BMC串口具有第一信号接收端，系统串口具有第二信号接收端，面板接口具有第三信号接收端；第一信号接收端与第三信号接收端连接；第二信号接收端通过导通开关与第三信号接收端连接，信号断开的状态为第三状态，信号导通的状态为第四状态；上述服务器串口切换方法还包括：切换控制模块根据切换指令，控制导通开关在第三状态和第四状态之间进行切换。
与现有技术相比，本发明所述的服务器串口切换装置及方法、服务器，可以直接使用串口命令进行切换，无需人工现场操作，使用方便，无需服务器另外提供物理切换按钮，实现简单，而且BMC串口和系统都可以支持信息输入。
附图说明
图1是根据本发明实施例的服务器串口切换装置的结构示意图；
图2是根据本发明实施例的服务器的结构示意图；
图3是根据本发明优选实施例的服务器串口切换装置的结构框图；以及
图4是根据本发明优选实施例的服务器串口切换流程示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域的普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例公开了一种服务器串口切换装置。图1是根据本发明实施例的服务器串口切换装置的结构示意图，如图1所示，该装置可以包括：面板接口、基板管理控制器(BMC)串口、系统串口、导通选择开关以及切换控制模块，其中：
BMC串口具有第一信号发送端，系统串口具有第二信号发送端；
面板接口，设置在服务器的面板上，具有第三信号发送端；
第一信号发送端和第二信号发送端通过导通选择开关与第三信号发送端连接，其中，第一信号发送端通过导通选择开关与第三信号发送端连接且信号导通的状态为第一状态，第二信号发送端通过导通选择开关与第三信号发送端连接且信号导通的状态为第二状态；
切换控制模块，位于BMC，设置为根据切换指令，控制导通选择开关在第一状态和第二状态之间进行切换。
通过图1所示的装置，可以简化现有技术通过设置切换按键在系统串口和BMC串口与面板接口的连接状态之间进行切换产生的繁琐操作，避免人工现场操作导致的人力资源浪费。
在本发明实施例的一个优选实施方式中，图1所示的装置还可以进一步包括(这里不再结合附图进行说明)：
导通开关；
BMC串口具有第一信号接收端，系统串口具有第二信号接收端，面板接口具有第三信号接收端；
第一信号接收端与第三信号接收端连接；第二信号接收端通过导通开关与第三信号接收端连接，信号断开的状态为第三状态，信号导通的状态为第四状态；
切换控制模块，设置为根据切换指令，控制导通开关在第三状态和第四状态之间进行切换。
通过该优选实施例方式的实现，能够支持BMC串口通过面板接口获得用户的输入信息。
在本发明实施例的一个优选实施方式中，服务器默认的导通状态可以为第一状态和第三状态；在服务器需要使用系统串口的情况下，切换指令可以为：从第一状态切换到第二状态，且从第三状态切换到第四状态。
也就是说，在系统默认的连接状态下，BMC串口的信号发送端通过导通选择开关与面板接口的信号发送端的连接状态是导通的，BMC串口的信号接收端是直接与面板的信号接收端连接的，同时系统串口的信号接收端也通过导通开关与面板接口进行连接，但由于导通开关具有开启和关闭两种状态，而默认的状态是导通开关处于关闭的状态，因此，需要使用系统串口时，使用导通选择开关断开BMC的信号发送端与面板接口的信号发送端之间的导通状态，而打开系统串口的信号发送端与面板接口的信号发送端之间的导通状态，同时使导通选择开关当导通开关处于开启状态，系统串口的信号接收端自然也与面板接口的信号接收端之间的电路也就导通了。
在本发明实施例中，切换控制模块可以通过第一信号接收端与第三信号接收端连接，还可以设置为对用户输入到第三信号接收端的所有字符进行监测，获取切换指令。
在实际应用中，切换控制模块一旦获取到切换指令时，就可以控制导通选择开关或导通开关的导通状态，以控制在第一、二、三、四状态之间进行切换。
在本发明实施例中，服务器串口切换装置还可以包括：电平转换芯片，设置为对BMC串口/系统串口与面板接口之间传输的信号进行电平转换，使得转换后的信号电平符合BMC串口、系统串口以及面板接口的接口标准。具体地，电平转换芯片具有通用异步收发传输器(UART)接口和RS232接口；UART接口包括：设置为传输发送信号的第一UART接口和设置为传输接收信号的第二UART接口，其中，第一UART接口通过导通选择开关与第一信号发送端和第二信号发送端连接，第二UART接口与第一信号接收端连接且通过上述导通开关与第二信号接收端连接；RS232接口包括：设置为传输发送信号的第一RS232接口和设置为传输接收信号的第二RS232接口，其中，第一RS232接口与第三信号发送端连接，第二RS232接口与第三信号接收端连接。
优选地，第一UART接口和第二UART接口的信号电平幅值范围为(0V，3.3V)；第一RS232接口和第二RS232接口的信号电平幅值范围为(－15V-15V)；导通选择 开关包括：单刀双掷(SPDT)开关，其中，SPDT开关包括：符合SPDT规格的模拟开关芯片；导通开关包括：单刀单掷(SPST)开关，其中，SPST开关包括：符合SPST规格的模拟开关芯片；面板接口位于服务器的前端面板或后端面板上；面板接口为RJ45插座或DB9插座。
本发明实施例还提供了一种服务器。请参考图2，图2是根据本发明实施例的服务器的结构示意图，如图2所示，该服务器包括上述服务器串口切换装置。由于上述实施例已经对服务器串口切换装置进行了详细描述，这里不再对该服务器中涉及到服务器串口切换装置的结构部分进行赘述。
对应于上述实施例提供的服务器串口切换装置和服务器，本发明实施例还还提供了一种服务器串口切换方法，应用于服务器中需要对基板管理控制器(BMC)串口和系统串口与面板接口之间的连接状态进行切换的场景，其中，该方法运行的服务器包括：设置在服务器的面板上的面板接口、基板管理控制器BMC串口、系统串口、导通选择开关以及位于BMC的切换控制模块，其中，BMC串口具有第一信号发送端，系统串口具有第二信号发送端，面板接口具有第三信号发送端；第一信号发送端和第二信号发送端通过导通选择开关与第三信号发送端连接，其中，第一信号发送端通过导通选择开关与第三信号发送端连接且信号导通的状态为第一状态，第二信号发送端通过导通选择开关与第三信号发送端连接且信号导通的状态为第二状态；基于该服务器，该服务器串口切换方法包括：
切换控制模块通过第一信号接收端对用户输入到第三信号接收端的所有字符进行监测，获取切换指令；切换控制模块根据切换指令，控制导通选择开关在第一状态和第二状态之间进行切换。
进一步地，服务器还可以包括：导通开关；BMC串口具有第一信号接收端，系统串口具有第二信号接收端，面板接口具有第三信号接收端；第一信号接收端与第三信号接收端连接；第二信号接收端通过导通开关与第三信号接收端连接，信号断开的状态为第三状态，信号导通的状态为第四状态；基于该服务器，该服务器串口切换方法还可以包括：
切换控制模块根据切换指令，控制导通开关在第三状态和第四状态之间进行切换。
本发明实施例，实现了一种简单方便的串口共用方法，解决了服务器无法同时为系统串口和BMC串口出面板接口的问题，特别克服了现有技术存在的需另外提供切换按钮、操作麻烦、BMC串口不支持输入的问题。
下面结合图3和图4以及优选实施例对上述实施例提供的服务器串口切换装置进行进一步的描述。
本优选实施例解决上述技术问题的思路在于：(1)面板接口的发送信号经过单刀双掷开关，分别连接到系统串口和BMC串口，实现两者发送信号的选择切换，而面板接口的输入信号直接连到BMC串口，同时经过一个单刀单掷开关也连接到系统串口，这样两个串口都可以支持输入。(2)在BMC串口使用面板接口时，需要通过单刀单掷开关断开与系统串口的连接，避免给系统输入错误指令，整个使用过程中，BMC切换模块始终保持着对串口输入的监测，当识别到串口切换命令时，BMC切换模块自动操作单刀双掷开关和单刀单掷开关的选择端切换串口。
基于该思路，本优选实施例主要提供这样的技术方案：将单刀双掷开关初始默认切到BMC串口发送端，单刀单掷开关处于断开状态，由BMC串口使用面板接口，当用户需要使用系统串口时，在BMC串口或通过面板接口输入串口切换命令，BMC切换模块识别到命令后，通过控制单刀双掷开关选择端的信号状态，将面板接口的发送信号切换到系统串口端，同时开启单刀单掷开关，将面板接口的接收信号连到系统串口端，改由系统串口使用面板接口，但BMC串口始终保持着对面板接口输入信号的监测；当用户需要换回使用BMC串口时，再次在BMC串口或通过面板接口输入串口切换命令，BMC切换模块识别到命令后，控制单刀双掷开关选择端的信号状态，将面板接口的发送信号切换到BMC串口端，同时通过单刀单掷开关，断开系统端串口输入信号与面板接口的连接，于是恢复成由BMC串口使用面板接口，后续如此循环操作即可。
为便于理解，以下结合图3进行说明，图3是根据本发明优选实施例的服务器串口切换装置的结构框图，如图3所示，本发明实施例提供的服务器串口共用装置主要包括：面板接口、电平转换芯片、单刀双掷开关、单刀单掷开关、BMC串口、系统串口和BMC切换模块，具体说明如下：
面板接口，位于服务器前端面板或后端面板上，设置为提供对外的串口连接接口，具体提供串口TX(发送)和RX(接收)信号的对外连接，根据需要可以采用占用空间小的RJ45插座或者更加通用的DB9插座实现。
电平转换芯片，由于系统串口和BMC串口都符合UART(Universal Asynchronous Receiver and Transmitter，通用异步收发传输器)接口标准(其中，信号电平幅值一般在0V至3.3V之间)，面板接口对外连接的串口信号需符合RS232接口标准(其中，信号电平幅值在-15V至15V之间)，这两种接口标准信号无法直接兼容，所以需要采 用电平转换芯片，实现两种接口标准间的信号转换。具体地，如图3所示，芯片的UART接口侧TX信号连接到单刀双掷开关的3脚，UART接口侧的RX信号直接连接BMC串口的RX信号，同时连接到单刀单掷开关的2脚，芯片RS232接口侧的TX和RX信号分别连接面板接口的TX和RX信号。在实际应用中，电平转换芯片可选用ADI公司的ADM3202，当然，也可选用类似功能的芯片，只要能够实现UART接口标准与RS232两种接口标准间的信号转换即可。
单刀双掷开关，可以实现串口发送信号的切换选择，设置为控制面板接口发送信号与系统串口和BMC串口发送信号间的连接，如图3所示，3脚连接电平转换芯片UART接口侧的TX信号，1脚连接系统串口的TX信号，2脚连接BMC串口的TX信号，S选择脚连接BMC控制的SWT信号。在实际应用中，可以选用SPDT(single pole dual throw，单刀双掷)规格的模拟开关芯片实现。
单刀单掷开关，可以实现系统串口接收信号的连接控制，设置为在BMC串口使用面板接口时，断开系统串口接收信号与面板接口的连接，避免在使用BMC串口过程中给系统输入错误指令，导致系统运行异常，如图3所示，2脚连接电平转换芯片UART接口侧的RX信号，1脚连接系统串口的RX信号，S选择脚连接BMC控制的SWT信号。可选用SPST(single pole single throw，单刀单掷)规格的模拟开关芯片实现。
BMC串口，即由BMC提供的UART接口，设置为输出BMC的运行状态信息，同时支持用户输入，实现信息交互。
系统串口，即由系统提供的UART接口，设置为输出系统的运行状态信息，同时支持用户输入，实现信息交互。
BMC切换模块，设置为实现对BMC串口输入字符的监测，当识别到切换指令后自动实施串口切换操作，在实际应用中，BMC切换模块可以由软件编码实现，具体功能包括对BMC串口的输入字符进行实时监测，当识别到切换指令后，自动通过翻转SWT信号电平来控制外部开关的状态，实施串口切换操作。
图4是根据本发明优选实施例的服务器串口切换流程示意图，如图4所示，该流程包括以下步骤：
步骤S401、初始默认将单刀双掷开关切到BMC串口发送端，单刀单掷开关断开，由BMC串口使用面板接口。
步骤S402、当用户需要使用系统串口时，在串口中输入串口切换命令，BMC切换模块识别到命令后，通过SWT信号控制单刀双掷开关选择端的信号状态，将面板接口的发送信号连接到系统串口，并同步由SWT信号开启单刀单掷开关，将面板接口的接收信号连到系统串口端，改由系统串口使用面板接口。
步骤S403、系统串口使用面板接口的过程中，面板接口RX信号继续连接到BMC串口，BMC切换模块保持对面板接口输入字符的监测。
步骤S404、当用户需要换回使用BMC串口时，再次在串口中输入串口切换命令，BMC切换模块识别到命令后，通过SWT信号控制单刀双掷选择端的信号状态，将面板接口的发送信号连接到BMC串口，并同步由SWT信号断开单刀单掷开关，恢复成由BMC串口使用面板接口。
由此可见，本优选实施例可以直接使用串口命令进行切换，无需人工现场操作，使用方便，而且，无需服务器另外提供切换按钮，实现简单，两个串口都可以支持输入。
综上所述，通过本发明实施例，无需人工现场操作，无需服务器另外提供按键，通过输入串口命令即可实施共用串口的切换操作，完全解决了现有技术存在的缺陷，为服务器系统串口和BMC串口共用一个面板接口提供了实现简单、使用方便的方案。本发明为服务器的设计提供了重要的依据。
以上所述是本发明的优选实施方式，应当指出，对于本领域的普通技术人员来说，在不脱离本发明所述原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为包含在本发明的保护范围之内。
工业实用性
如上所述，本发明实施例提供的一种服务器串口切换装置及方法、服务器具有以下有益效果：可以直接使用串口命令进行切换，无需人工现场操作，使用方便，无需服务器另外提供物理切换按钮，实现简单，而且BMC串口和系统都可以支持信息输入。

Claims (10)

  1. 一种服务器串口切换装置，包括：面板接口、基板管理控制器BMC串口、系统串口、导通选择开关以及切换控制模块，其中，
    所述BMC串口具有第一信号发送端，所述系统串口具有第二信号发送端；
    所述面板接口，设置在服务器的面板上，具有第三信号发送端；
    所述第一信号发送端和所述第二信号发送端通过所述导通选择开关与所述第三信号发送端连接，其中，所述第一信号发送端通过所述导通选择开关与所述第三信号发送端连接且信号导通的状态为第一状态，所述第二信号发送端通过所述导通选择开关与所述第三信号发送端连接且信号导通的状态为第二状态；
    所述切换控制模块，位于BMC，设置为根据切换指令，控制所述导通选择开关在所述第一状态和所述第二状态之间进行切换。
  2. 根据权利要求1所述的装置，其中，所述装置还包括：
    导通开关；
    所述BMC串口具有第一信号接收端，所述系统串口具有第二信号接收端，所述面板接口具有第三信号接收端；
    所述第一信号接收端与所述第三信号接收端连接；
    所述第二信号接收端通过所述导通开关与所述第三信号接收端连接，信号断开的状态为第三状态，信号导通的状态为第四状态；
    所述切换控制模块，设置为根据所述切换指令，控制所述导通开关在所述第三状态和所述第四状态之间进行切换。
  3. 根据权利要求2所述的装置，其中，
    服务器默认的导通状态为所述第一状态和所述第三状态；
    在服务器需要使用所述系统串口的情况下，所述切换指令为：从所述第一状态切换到所述第二状态，且从所述第三状态切换到所述第四状态。
  4. 根据权利要求2所述的装置，其中，
    所述切换控制模块，通过所述第一信号接收端与所述第三信号接收端连接，还设置为对用户输入到所述第三信号接收端的所有字符进行监测，获取所述切换指令。
  5. 根据权利要求1至4中任一项所述的装置，其中，所述装置还包括：
    电平转换芯片，设置为对所述BMC串口/所述系统串口与所述面板接口之间传输的信号进行电平转换，使得转换后的信号电平符合所述BMC串口、所述系统串口以及所述面板接口的接口标准。
  6. 根据权利要求5所述的装置，其中，
    所述电平转换芯片具有通用异步收发传输器UART接口和RS232接口；
    所述UART接口包括：设置为传输发送信号的第一UART接口和设置为传输接收信号的第二UART接口，其中，所述第一UART接口通过所述导通选择开关与所述第一信号发送端和所述第二信号发送端连接，所述第二UART接口与所述第一信号接收端连接且通过上述导通开关与所述第二信号接收端连接；
    所述RS232接口包括：设置为传输发送信号的第一RS232接口和设置为传输接收信号的第二RS232接口，其中，所述第一RS232接口与所述第三信号发送端连接，所述第二RS232接口与所述第三信号接收端连接。
  7. 根据权利要求6所述的装置，其中，
    所述第一UART接口和所述第二UART接口的信号电平幅值范围为(0V，3.3V)；
    所述第一RS232接口和所述第二RS232接口的信号电平幅值范围为(－15V-15V)；
    所述导通选择开关包括：单刀双掷SPDT开关，其中，所述SPDT开关包括：符合SPDT规格的模拟开关芯片；
    所述导通开关包括：单刀单掷SPST开关，其中，所述SPST开关包括：符合SPST规格的模拟开关芯片；
    所述面板接口位于所述服务器的前端面板或后端面板上；
    所述面板接口为RJ45插座或DB9插座。
  8. 一种服务器，包括：权利要求1至7中任一项所述的服务器串口切换装置。
  9. 一种服务器串口切换方法，应用于服务器中需要对基板管理控制器BMC串口和系统串口与面板接口之间的连接状态进行切换的场景，
    所述服务器包括：设置在服务器的面板上的面板接口、基板管理控制器BMC串口、系统串口、导通选择开关以及位于BMC的切换控制模块，其中，所述BMC串口具有第一信号发送端，所述系统串口具有第二信号发送端，所述面板接口具有第三信号发送端；
    所述第一信号发送端和所述第二信号发送端通过所述导通选择开关与所述第三信号发送端连接，其中，所述第一信号发送端通过所述导通选择开关与所述第三信号发送端连接且信号导通的状态为第一状态，所述第二信号发送端通过所述导通选择开关与所述第三信号发送端连接且信号导通的状态为第二状态；
    所述方法包括：
    所述切换控制模块通过所述第一信号接收端对用户输入到所述第三信号接收端的所有字符进行监测，获取所述切换指令；
    所述切换控制模块根据所述切换指令，控制所述导通选择开关在所述第一状态和所述第二状态之间进行切换。
  10. 根据权利要求9所述的方法，其中，
    所述服务器还包括：导通开关；
    所述BMC串口具有第一信号接收端，所述系统串口具有第二信号接收端，所述面板接口具有第三信号接收端；
    所述第一信号接收端与所述第三信号接收端连接；
    所述第二信号接收端通过所述导通开关与所述第三信号接收端连接，信号断开的状态为第三状态，信号导通的状态为第四状态；
    所述方法还包括：
    所述切换控制模块根据所述切换指令，控制所述导通开关在所述第三状态和所述第四状态之间进行切换。
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