CN112186892A - Power supply rack communication device, communication method and electronic equipment - Google Patents

Abstract

The invention provides a power supply rack communication device, a communication method and electronic equipment, belongs to the technical field of network equipment, and solves the technical problem that a specific fault slave machine is difficult to locate and diagnose when an I2C bus is locked in the prior art. The power supply frame communication device comprises a substrate management controller, a plurality of memories and a plurality of CAN buses; the first end of each CAN bus is connected with the baseboard management controller through a CAN controller, and the second end of each CAN bus is connected with the plurality of memories through the CAN controller respectively.

Description

Power supply rack communication device, communication method and electronic equipment

Technical Field

The invention relates to the technical field of network equipment, in particular to a communication device and method inside a power supply frame and electronic equipment.

Background

With the continuous development of network technology, the stability requirements of various network devices on the power supply system are gradually increased. The power supply frame communication device plays a very important role in the stability of a power supply system.

At present, an I2C bus (integrated circuit bus) is generally used inside a power supply rack (PowerShelf) to realize communication between a Baseboard Management Controller (BMC) and an eFuse Board (one-time programmable memory). If once the I2C bus is locked in the communication process, the BMC cannot distinguish which slave address specifically causes the I2C bus to be locked, and particularly, in the test process, each eFuse must be tested in sequence to find a specific failed eFuse Board, so that the problem is difficult to locate and diagnose in the test process, and a lot of difficulties are brought to the application links such as the test.

Therefore, in the power supply rack communication device in the prior art, when the I2C bus is locked, it is difficult to locate and diagnose a specific fault slave, and each eFuse Board needs to be tested in sequence, which brings inconvenience to the testing link, increases the difficulty of troubleshooting, and reduces the working efficiency of operation and maintenance work.

Disclosure of Invention

The invention aims to provide a power supply rack communication device, a power supply rack communication method and electronic equipment, and solves the technical problem that a specific fault slave is difficult to locate and diagnose when an I2C bus is locked in the prior art.

In a first aspect, the present invention provides a power rack communication device, including a baseboard management controller, a plurality of memories, and a plurality of CAN buses;

the first end of each CAN bus is connected with the baseboard management controller through a CAN controller, and the second end of each CAN bus is connected with the plurality of memories through the CAN controller respectively.

Further, the communication signal of the CAN bus is a differential mode signal.

Further, the frame structure in the CAN bus communication comprises a frame starting section, an arbitration section, a control section, a data section, a CRC section, an ACK section and a frame ending section;

the frame start includes a start signal;

sequentially sending data to the bus according to the sequence from small ID value to large ID value on the arbitration segment;

the control section displays the length of the data bytes contained in the data section by adopting binary coding;

comparing and verifying the check code on the CRC section with the check code calculated by the receiving end;

when the receiving node correctly receives the data, the ACK section is changed from recessive to dominant bit;

the end of frame segment includes a plurality of recessive bits indicating the end of data synchronization.

In a second aspect, the present invention further provides a communication method, including the power rack communication device of the first aspect, including:

the baseboard management controller sends a read data request to the ith memory through the CAN bus; i is more than or equal to 1 and less than or equal to n, and n is the total number of the memories;

if the communication is successful, the substrate management controller collects ID data from the ith memory and stores the ID data into a record; if the communication fails, generating alarm information aiming at the ith memory;

judging whether i is less than n;

if yes, the baseboard management controller returns an access index i +1 of the memory to the baseboard management controller, and sends a read data request to the ith memory through the CAN bus;

if not, resetting the access index i to 1, and returning to the step that the substrate management controller sends a read data request to the ith memory through the CAN bus.

Further, the CAN controller also comprises a cache;

the communication method further comprises the following steps:

when the CAN bus detects a sending error or a receiving error, accumulating and recording an error count value in a cache;

when the error count value reaches the set threshold value, the CAN bus switches the error state and is automatically closed.

In a third aspect, the present invention further provides an electronic device, including the power supply rack communication apparatus in the first aspect.

Further, the electronic device is a server.

The invention provides a power supply rack communication device which comprises a substrate management controller, a plurality of memories and a plurality of CAN buses. The first end of each CAN bus is connected with the substrate management controller through the CAN controller, and the second end of each CAN bus is respectively connected with the plurality of memories through the CAN controller, namely the substrate management controller is connected with the plurality of memories through the CAN buses. During communication, the baseboard management controller sends a data reading request to the ith memory through the CAN bus; i is more than or equal to 1 and less than or equal to n, n is the total number of the memories, the communication is successful, and the substrate management controller collects ID data from the ith memory and stores the ID data into a record; if the communication fails, generating alarm information aiming at the ith memory; judging whether i is less than n; if yes, the baseboard management controller returns an access index i +1 of the memory to the baseboard management controller, and sends a read data request to the ith memory through the CAN bus; if not, resetting the access index i to 1, and returning to the step that the substrate management controller sends a read data request to the ith memory through the CAN bus. Namely, the substrate management controller sends the request for reading data to the N memories in turn through the CAN bus. If the communication is successful, the ID data on the memory can be collected and stored into a record; if the communication fails, alarm information is generated aiming at the memory. Then the next memory is accessed in sequence until the Nth memory is accessed, and then the access is continued from the first memory instead, and the polling access is performed circularly. By adopting the power supply frame device for communication, the position of the fault memory can be specifically positioned by utilizing a mode that alarm information is generated aiming at the fault memory when the memory is accessed by polling, so that the technical problem that a specific fault slave is difficult to position and diagnose when an I2C bus is locked in the prior art is solved, convenience is provided for fault troubleshooting work, and the working efficiency of operation and maintenance work is improved.

Accordingly, the communication method and the electronic device provided by the embodiment of the invention also have the technical effects.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of a power rack communication device according to an embodiment of the invention;

FIG. 2 is a flow chart of data access of a baseboard management controller according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a frame structure of CAN bus communication according to an embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "comprising" and "having," and any variations thereof, as referred to in embodiments of the present invention, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

At present, I2C bus is usually adopted inside the power supply rack to realize the communication between the BMC Board and the eFuse Board. If once the I2C bus is locked in the communication process, the BMC cannot distinguish which slave address specifically causes the I2C bus to be locked, and particularly, in the test process, each eFuse must be tested in sequence to find a specific failed eFuse Board, so that the problem is difficult to locate and diagnose in the test process, and a lot of difficulties are brought to the application links such as the test.

Therefore, in the power supply rack communication device in the prior art, when the I2C bus is locked, it is difficult to locate and diagnose a specific fault slave, and each eFuse Board needs to be tested in sequence, which brings inconvenience to the testing link, increases the difficulty of troubleshooting, and reduces the working efficiency of operation and maintenance work.

To solve the above problems, an embodiment of the present invention provides a power rack communication device.

Example 1:

as shown in fig. 1 and 2, an embodiment of the invention provides a power rack communication device, which includes a baseboard management controller, a plurality of memories, and a plurality of CAN buses.

The first end of each CAN bus is connected with the substrate management controller through the CAN controller, and the second end of each CAN bus is connected with the plurality of memories through the CAN controller respectively. Namely, the substrate management controller and the plurality of memories are connected through a CAN bus.

The baseboard management controller sends a read data request to the ith memory through the CAN bus; i is more than or equal to 1 and less than or equal to n, n is the total number of the memories, the communication is successful, and the substrate management controller collects ID data from the ith memory and stores the ID data into a record; if the communication fails, generating alarm information aiming at the ith memory; judging whether i is less than n; if yes, the baseboard management controller returns an access index i +1 of the memory to the baseboard management controller, and sends a read data request to the ith memory through the CAN bus; if not, resetting the access index i to 1, and returning to the step that the substrate management controller sends a read data request to the ith memory through the CAN bus. Namely, the substrate management controller sends the request for reading data to the N memories in turn through the CAN bus. If the communication is successful, the ID data on the memory can be collected and stored into a record; if the communication fails, alarm information is generated aiming at the memory. Then the next memory is accessed in sequence until the Nth memory is accessed, and then the access is continued from the 1 st memory instead, and the polling access is performed circularly.

For example: the total number N of the memories is 16, the baseboard management controller starts to send a data reading request to the 1 memory through the CAN bus, and if the communication is successful, the ID data on the 1 st memory are collected and stored in a record; if the communication fails, alarm information is generated for the 1 st memory, then the 2 nd memory is continuously accessed until the 16 th memory is accessed, and then the 1 st memory is continuously accessed.

By adopting the power supply frame communication device provided by the embodiment of the invention, the position of the fault memory can be specifically positioned by utilizing a mode that the alarm information is generated aiming at the fault memory when the memory is accessed by polling, so that the technical problem that a specific fault slave is difficult to position and diagnose when an I2C bus is locked in the prior art is solved, convenience is provided for fault troubleshooting work, and the work efficiency of operation and maintenance work is improved.

In one possible embodiment, the communication signal of the CAN bus is a differential mode signal. The anti-interference performance of the differential mode signal is strong, and the method plays an important role in improving the quality of the communication signal.

In one possible embodiment, as shown in fig. 3, the frame structure in the CAN bus communication includes a start frame segment, an arbitration segment, a control segment, a data segment, a CRC segment, an ACK segment, and an end frame segment. All parts in the frame structure cooperate with each other to improve the accuracy and stability of data transmission in CAN bus communication.

The start of frame includes an enable signal to indicate that the bus is currently idle and that synchronization data can begin.

And sequentially sending data to the bus according to the sequence from small ID value to large ID value on the arbitration segment, and judging the priority when the data are transmitted by multiple nodes at the same time.

The control section displays the data byte length contained in the data section by adopting binary coding and is used for prompting the byte length of the data message on the data section.

And comparing the check code on the CRC section with the check code calculated by the receiving end for verification, calculating the value of the check code again by the receiving end, and refusing to receive if the check code calculated by the receiving end is different from the check code on the CRC section, so that the accuracy of data transmission is improved.

When the receiving node correctly receives the data, the ACK section is changed from recessive to dominant bit for distinguishing whether the data is correctly transmitted.

The end of frame segment includes a plurality of recessive bits that indicate the end of data synchronization to indicate that the transmission of information has been completed.

Example 2:

the embodiment of the invention also provides a communication method which is applied to the power supply rack communication device provided by the embodiment. As shown in fig. 2, the communication method includes the steps of:

the baseboard management controller sends a read data request to the ith memory through the CAN bus; i is more than or equal to 1 and less than or equal to n, and n is the total number of the memories;

the substrate management controller collects ID data from the ith memory and stores the ID data into a record when the communication is successful; if the communication fails, generating alarm information aiming at the ith memory;

judging whether i is less than n;

if yes, the baseboard management controller returns an access index i +1 of the memory to the baseboard management controller and sends a read data request to the ith memory through the CAN bus;

if not, resetting the access index i to 1, and returning to the step that the baseboard management controller sends a read data request to the ith memory through the CAN bus.

In the method, when each memory is polled and accessed, the alarm information is generated aiming at the fault memory, the position of the fault memory can be specifically positioned, convenience is provided for troubleshooting work, and the work efficiency of operation and maintenance work is improved.

In one possible embodiment, the CAN controller further comprises a cache;

the communication method further comprises the following steps:

when the CAN bus detects a sending error or a receiving error, the error count value is accumulated and recorded in the cache, and when the error count value reaches a set threshold value, the CAN bus switches the error state, automatically closes, and CAN be reactivated. The CAN bus has certain fault tolerance, CAN be automatically closed when a large number of transmission errors occur, avoids the problems of bus locking and the like, and improves the stability of bus communication to the maximum extent.

Example 3:

the embodiment of the invention also provides electronic equipment which is applied to the power supply rack communication device provided by the embodiment.

Based on this, the electronic device may be a server. By adopting the power supply frame communication device, the stability of the server can be increased, and the working efficiency of the operation and maintenance work of the server is improved.

The electronic device provided by the embodiment of the present invention has the same technical features as the power supply rack communication device provided by the above embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements 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. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, 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 in specific cases to those skilled in the art.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures, and moreover, the terms "first", "second", "third", etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; and the modifications, changes or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention. Are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (7)

1. A power supply frame communication device is characterized by comprising a substrate management controller, a plurality of memories and a plurality of CAN buses;

the first end of each CAN bus is connected with the baseboard management controller through a CAN controller, and the second end of each CAN bus is connected with the plurality of memories through the CAN controller respectively.

2. The communication device inside the power supply rack of claim 1, wherein the communication signal of the CAN bus is a differential mode signal.

3. The communication device inside the power supply rack according to claim 1, wherein the frame structure in the CAN bus communication comprises a frame start section, an arbitration section, a control section, a data section, a CRC section, an ACK section, and a frame end section;

the frame start includes a start signal;

sequentially sending data to the bus according to the sequence from small ID value to large ID value on the arbitration segment;

the control section displays the length of the data bytes contained in the data section by adopting binary coding;

comparing and verifying the check code on the CRC section with the check code calculated by the receiving end;

when the receiving node correctly receives the data, the ACK section is changed from recessive to dominant bit;

the end of frame segment includes a plurality of recessive bits indicating the end of data synchronization.

4. A communication method applied to the power supply rack communication device according to any one of claims 1 to 3, comprising:

the baseboard management controller sends a read data request to the ith memory through the CAN bus; i is more than or equal to 1 and less than or equal to n, and n is the total number of the memories;

if the communication is successful, the substrate management controller collects ID data from the ith memory and stores the ID data into a record; if the communication fails, generating alarm information aiming at the ith memory;

judging whether i is less than n;

if yes, the baseboard management controller returns an access index i +1 of the memory to the baseboard management controller, and sends a read data request to the ith memory through the CAN bus;

if not, resetting the access index i to 1, and returning to the step that the substrate management controller sends a read data request to the ith memory through the CAN bus.

5. The communication method according to claim 4, wherein the CAN controller further comprises a buffer;

the communication method further comprises the following steps:

when the CAN bus detects a sending error or a receiving error, accumulating and recording an error count value in a cache;

when the error count value reaches the set threshold value, the CAN bus switches the error state and is automatically closed.

6. An electronic device comprising the power rack communication device of any one of claims 1 to 3.

7. The electronic device of claim 6, wherein the electronic device is a server.

Images