CN106354685A

CN106354685A - Implementation method of PSU and ME communication I2C bus hang recovery

Info

Publication number: CN106354685A
Application number: CN201610689471.7A
Authority: CN
Inventors: 高鹏飞; 肖波; 滕学军; 李松磊
Original assignee: Inspur Electronic Information Industry Co Ltd
Current assignee: Inspur Electronic Information Industry Co Ltd
Priority date: 2016-08-19
Filing date: 2016-08-19
Publication date: 2017-01-25

Abstract

The invention discloses an implementation method of PSU and ME communication I2C bus hang recovery. The method comprises the steps that a power supply is communicated with the system through a PMBus, a communication signal between the power supply and the system is detected, and when it is judged that communication is abnormal, the power supply forces a bus to be reset, that is to say, a communication bus state is recovered through a self-recovery function of the power PMBus, wherein the bus is the I2C bus. Compared with the prior art, according to the implementation method of the PSU and ME communication I2C bus hang recovery, the bus hang problem is effectively solved, and improvement of reliability of communication between the power supply and a server is greatly promoted; by means of the mode that PSU sends a pulse signal to activate a communication bus, interrupted communication can be effectively recovered, and it is guaranteed that power supply information is read normally.

Description

A kind of psu and me communication i2c bus hangs the dead implementation method recovered

Technical field

The present invention relates to field of computer technology, specifically a kind of practical, psu and me communication i2c bus extension The dead implementation method recovered.

Background technology

With the fast development of internet economy, the status of server is obviously improved, and server power supply is as in server Vitals also increasingly paid attention to by everybody, the information for power supply reads also more and more frequent, and psu and me communication Bridge, i.e. i2c bus, its reliability become information reading pith, realize highly reliable communication link be service The important support point of device and power source communications.

Currently, the reading of power information mainly has both of which: one, bmc and psu direction communication, and this communication pattern can Higher by property, project plan comparison is ripe, directly by bmc process when communication failure, easily and effectively；2nd, me and psu leads to Letter, bmc reads power information from me, and this pattern is commercially also particularly common, scheme also comparative maturity, but communicates out When now abnormal, due to me cannot voluntarily process problem, can only be processed by way of bmc reset me, this mode mesh Front discovery has hiding risk and cannot solve in the short time, thus, it is desirable to go to recover the communication of i2c by way of new.

In order to solve the problems, such as that between psu and me, communication disruption or communication are bad, improve the reliability of communication, the present invention The implementation method that a kind of psu and me communicates the dead recovery of i2c bus extension is provided.

Content of the invention

The technical assignment of the present invention is for above weak point, provides a kind of practical, psu and me communication i2c total The dead implementation method recovered hung by line.

A kind of psu and me i2c bus that communicates hangs the dead implementation method recovered, and it is realized process and is: it is total that power supply passes through pmbus Line and system communication, detection power supply and system between communication signal, judge communication abnormality when, power supply to bus forced resetting, I.e. by using the self-recovering function of power supply pmbus bus, again recover communication bus state, bus here refers to that i2c is total Line.

Communication signal between power supply and system is clock signal scl data signal sdl, and two kinds of signals are high electricity Flat pulse signal, when data communication is abnormal, the clock signal of pmbus bus, data signal can be changed to low level, according to this Characteristic can determine that whether communication is normal.

Judge whether communication is just referring to the 35ms persistent period whether specifying when bus low level more than smbus, at that time When clock signal, data signal continue more than 3 times that the low level time is 35ms, to bus forced resetting.

The every 10ms of power supply detects i2c clock signal, a bus level for data signal, if low level continues 100ms, Then clock signal, data signal send activation signal activation bus；If low level continues less than 100ms, do not process continuation Cycle detection.

A kind of psu and me communication i2c bus of the present invention hangs the dead implementation method recovered, and has the advantage that

A kind of psu and me of the present invention i2c bus that communicates hangs the dead implementation method recovered, breach server be main frame, psu be The theory of slave, when psu and me communication bus hangs dead, psu is become main frame and sends pulse signal to activate bus, Thus recovering proper communication, after bus recovers proper communication, psu becomes slave mode again, it is to avoid produce impact to communication, improves logical The reliability of letter, solves the problems, such as between psu and me that communication disruption or communication are bad, practical it is easy to popularization.

Brief description

Accompanying drawing 1 recovers schematic block diagram for i2c bus.

Accompanying drawing 2 is forced to hang dead and recovery process waveform for mainboard scl.

Accompanying drawing 3 is forced to hang dead and recovery process waveform for mainboard sda.

Specific embodiment

Below in conjunction with the accompanying drawings and specific embodiment the invention will be further described.

Start the extensive application in the Internet and other markets with server, the communication reliability before psu with me becomes Capture power information for client and ensure the normal key run of machine room, it is extremely extensive that we predict that this psu and me communication i2c bus is hung Multiple method for designing, plays the role of good for the communication realizing server and power supply high reliability.

As shown in Figure 1, the present invention provides the implementation method that a kind of psu and me communicates the dead recovery of i2c bus extension, passes through The mode that psu sends pulse signal activates communication bus, that is, when psu and me communication bus hangs dead, psu is become main frame And send pulse signal to activate bus.Thus recovering proper communication.

It realizes process:

The mode of main frame will be become in the psu short time by slave, be forced to when communication disruption bus send sda or Sdl high level pulse signal is until bus recovers proper communication.Psu and me communication i2c bus hangs the dead detailed process recovered, such as Shown in Fig. 1.

When power supply pmbus is normal with system communication, clock signal (scl) data signal (sdl) is all high voltage signal, When data communication is abnormal, the clock of pmbus bus, data signal can be changed to low level, can determine that communication is according to this characteristic No normal.The detection to communication bus state for the power supply increase, the 35ms persistent period specifying more than smbus when bus low level, When clock signal, data signal continue more than 3 times that the low level time is 35ms, power supply is to bus forced resetting, again extensive Multiple communication bus state.

Plan-validation: clock signal (scl) will be communicated, data signal (sda) forces shorted to earth, respectively by using electricity The pmbus bus self-recovering function in source, checking can recover bus to normal condition, as shown in Figures 2 and 3.

By plan-validation, this scheme can hang dead problem with effectively solving bus, communicates for improving power supply server Reliability have very great help.

Therefore, psu and me communication i2c bus proposed by the invention is hung the dead method for designing recovered and is led in server power supply Can play an important role on letter and management function.

Using scheme of the present invention, i.e. the mode of psu transmission activating pulse signal communication bus, in can effectively recovering Disconnected communication, ensures that power information is normally read.

Above-mentioned specific embodiment is only the concrete case of the present invention, and the scope of patent protection of the present invention includes but is not limited to Above-mentioned specific embodiment, a kind of any psu and me communication i2c bus meeting the present invention hangs the power of the dead implementation method recovered The suitable change or replacement that sharp claim and any described technical field those of ordinary skill is done to it, all should fall into this The scope of patent protection of invention.

Claims

1. a kind of psu and me i2c bus that communicates hangs the dead implementation method recovered it is characterised in that it realizes process is: power supply leads to Cross pmbus bus and system communication, the communication signal between detection power supply and system, when judging communication abnormality, power supply is to bus Forced resetting, that is, by using the self-recovering function of power supply pmbus bus, recovers communication bus state, bus here again Refer to i2c bus.

2. a kind of psu and me according to claim 1 communicate i2c bus hang the dead implementation method recovered it is characterised in that Communication signal between power supply and system is clock signal scl data signal sdl, and two kinds of signals are high level pulse letter Number, when data communication is abnormal, the clock signal of pmbus bus, data signal can be changed to low level, can be sentenced according to this characteristic Whether fixed communication is normal.

3. a kind of psu and me according to claim 1 communicate i2c bus hang the dead implementation method recovered it is characterised in that Judge whether communication is just referring to the 35ms persistent period whether specifying when bus low level more than smbus, when clock signal, number It is believed that when number lasting low level time is more than 3 times of 35ms, to bus forced resetting.

4. a kind of psu and me according to claim 1 communicate i2c bus hang the dead implementation method recovered it is characterised in that The every 10ms of power supply detects i2c clock signal, a bus level for data signal, if low level continues 100ms, clock is believed Number, data signal send activation signal activation bus；If low level continues less than 100ms, do not process and continue cycling through inspection Survey.