CN114816020A - GD32 single-chip microcomputer-based PMBUS interface power board and BMC control method thereof - Google Patents
GD32 single-chip microcomputer-based PMBUS interface power board and BMC control method thereof Download PDFInfo
- Publication number
- CN114816020A CN114816020A CN202210374598.5A CN202210374598A CN114816020A CN 114816020 A CN114816020 A CN 114816020A CN 202210374598 A CN202210374598 A CN 202210374598A CN 114816020 A CN114816020 A CN 114816020A
- Authority
- CN
- China
- Prior art keywords
- chip microcomputer
- pmbus
- power supply
- bus
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3058—Monitoring arrangements for monitoring environmental properties or parameters of the computing system or of the computing system component, e.g. monitoring of power, currents, temperature, humidity, position, vibrations
Abstract
The invention relates to a PMBUS interface power board based on a GD32 single-chip microcomputer and a BMC control method thereof, and belongs to the field of power management. The invention provides a power board functional requirement and hardware design scheme, provides an overall design flow for realizing BMC function by GD32 single-chip microcomputer software, and provides a method for reading power module data of a PMBUS interface at GD32 and converting the data according to a PMBUS protocol to obtain power supply voltage, power supply current and working temperature data; aiming at the problem of unstable I2C communication, a targeted software fault-tolerant processing method is proposed in the aspects of error interruption, transmission timeout, error monitoring bit and the like. The invention improves the hardware integration level, reduces the software design complexity and improves the reliability of the monitoring data.
Description
Technical Field
The invention belongs to the field of power management, and particularly relates to a PMBUS interface power board based on a GD32 single-chip microcomputer and a BMC control method thereof.
Background
Industrial control equipment used in the fields of aerospace, national defense, military industry and the like has the characteristics of long service cycle, remote deployment site, high manual maintenance cost and the like, and the stable operation of the equipment has great benefits of national safety and the like, so that the reliability of the industrial control equipment is very high. The industrial control equipment generally comprises components such as a power supply board card, a calculation board card, a communication board card, a management board card and the like, wherein the power supply board card is used as a basic component of the industrial control equipment and plays a fundamental role in stable operation of the equipment.
In recent years, demand for information and intelligence in equipment maintenance has been increasing. More and more industrial control equipment is additionally provided with special BMC (baseboard management controller) management chips on each board card, a plurality of sensors are arranged for collecting data, I2C is used as a health management bus to be connected with each board card BMC chip, an IPMI (intelligent platform management interface) health management protocol is adopted for communication, and finally health management data of each module is collected on the management board card. The conventional power board card comprises an alternating current-direct current conversion circuit, a single chip microcomputer, a monitoring sensor circuit and the like. A plurality of voltage monitoring circuits, current monitoring circuits, thermistor temperature monitoring circuits and the like are arranged on the power supply board card. The single chip microcomputer collects data such as voltage, current, temperature and the like through a plurality of ADC pins and reports monitoring information to the management board card through an IPMI protocol. However, in the traditional design mode, the number of components is large, the integration level is low, the sampling precision of the ADC of the single chip microcomputer is not high, and special processing is carried out in modes of sampling averaging for multiple times, software error compensation and the like.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem of how to provide a PMBUS interface power board based on a GD32 single chip microcomputer and a BMC control method thereof, and aims to solve the problems that the existing power management components are large in number, low in integration level, low in ADC sampling precision of the single chip microcomputer, and special processing is carried out through modes of sampling averaging for multiple times, software compensation errors and the like.
(II) technical scheme
In order to solve the technical problem, the invention provides a power supply board card of a PMBUS interface based on a GD32 single chip microcomputer, the power supply board card comprises a power supply module of the PMBUS interface and a GD32 single chip microcomputer, the power supply module is responsible for alternating current-direct current conversion, the GD32 single chip microcomputer is provided with 2 paths of I2C communication interfaces, the 1 st path is connected with the power supply module of the PMBUS interface, the power supply voltage, the power supply current and the working temperature are read from the power supply module of the PMBUS interface by a PMBUS protocol, the 2 nd path of I2C is connected with an external management board card, and monitoring information is reported to the management board card by an IPMI protocol mode.
Furthermore, the power module inputs an alternating current 220V power supply and outputs a direct current 12V power supply.
The invention also provides a PMBUS interface BMC control method based on the GD32 single chip microcomputer, which comprises the following steps:
the method comprises the following steps that 2-path I2C controllers of an S11 single chip microcomputer and a GD32 single chip microcomputer are initialized, and communication baud rate parameters are configured;
the S12 and GD32 singlechips send enabling signals to the PMBUS interface power module;
s13, receiving IPMI request information from the management board card in a polling way;
s14, judging whether the IPMI request message checksum is correct, if so, switching to the step S15, and if not, resetting the I2C controller, and switching to the step S13;
s15, analyzing IPMI protocol request data in the IPMI request message, and obtaining commands in the request data, wherein the commands are 3 in total, namely obtaining power supply voltage, obtaining power supply current and obtaining working temperature;
s16, according to the command in the request data, the GD32 single chip microcomputer reads monitoring data information from the PMBUS interface power module;
s17, generating IPMI protocol response data according to the IPMI protocol specification;
s18, sending IPMI protocol response data to the management board card, if the IPMI protocol response data is successfully sent, ending the polling process, if the IPMI protocol response data is failed, resetting the I2C controller, and going to the step S13.
Further, I2C error interrupts of response missing, receiving overflowing, arbitration losing and bus errors of the GD32 single chip microcomputer I2C are counted, when the error counts are accumulated for 10 times, the I2C bus is judged to be abnormal, and the I2C controller is reset to operate.
Further, when the GD32 single-chip microcomputer sends I2C data, after the bus is judged to be in an idle state, a start signal is generated, and data sending operation is carried out, polling state flag bit judgment is carried out, if the flag bit is not normally set for more than 30ms, the I2C bus is judged to be abnormal, and I2C controller resetting operation is carried out.
Furthermore, the GD32 single-chip microcomputer is provided with an independent timer, the busy flag bit of the I2C controller is monitored at intervals of 1ms period, if the busy flag bit of the I2C is judged to be abnormal in 30 continuous periods, and the I2C controller is reset to operate.
The invention also provides a PMBUS interface BMC control method based on the GD32 single chip microcomputer, which comprises the following steps:
s201, judging that an I2C controller in the GD32 single chip microcomputer is in an idle state, if the controller is idle, turning to the step S202, if the controller is busy, resetting the I2C controller, and turning to the step S202;
s202, generating an I2C bus starting signal;
s203, sending a PMBUS module address on the I2C bus, judging whether an ACK response fed back by the PMBUS module is received or not, if the response is received, turning to the step S204, and if the response is not received, turning to the step S201;
s204, sending command word data to the PMBUS module on the I2C bus, wherein the command word is reading power supply voltage, reading power supply current or reading working temperature;
s205, regenerating an I2C bus starting signal;
s206, sending a PMBUS module address on the I2C bus, judging whether an ACK response fed back by the PMBUS module is received or not, if the response is received, turning to the step S207, and if the response is not received, returning to the step S201;
s207, receiving sensor monitoring data fed back by the PMBUS module;
s208, generating an I2C bus stop signal;
s209, judging whether the sensor monitoring data checksum received from the PMBUS module is correct, if so, turning to the step S210, and if not, discarding the data;
and S210, analyzing the monitoring data of the sensor to obtain the power supply voltage, the power supply current or the working temperature of the power supply module.
Furthermore, four I2C error interrupts including response missing, receiving overflowing, arbitration losing and bus error of the GD32 single chip microcomputer I2C are counted, when the error counts are accumulated for 10 times, the I2C bus is judged to be abnormal, and the I2C controller is reset to operate.
Further, when the GD32 single-chip microcomputer sends I2C data, after the bus is judged to be in an idle state, a start signal is generated, and data sending operation is carried out, polling state flag bit judgment is carried out, if the flag bit is not normally set for more than 30ms, the I2C bus is judged to be abnormal, and I2C controller resetting operation is carried out.
Furthermore, the GD32 single-chip microcomputer is provided with an independent timer, the busy flag bit of the I2C controller is monitored at intervals of 1ms period, if the busy flag bit of the I2C is judged to be abnormal in 30 continuous periods, and the I2C controller is reset to operate.
(III) advantageous effects
The invention provides a PMBUS interface power supply board card based on a GD32 single chip microcomputer and a BMC control method thereof, wherein a PMBUS interface power supply module has the functions of alternating current-direct current conversion and sensor monitoring, and a GD32 single chip microcomputer is used as a BMC to directly read monitoring information such as power supply voltage, power supply current, working temperature, fault alarm and the like from the PMBUS interface power supply module by a PMBUS protocol. The invention also designs a GD32 single-chip microcomputer software implementation power panel BMC overall design flow and a GD32 single-chip microcomputer power supply voltage, power supply current and working temperature data reading flow of the power module by a PMBUS protocol, and the flow is matched with the power panel card for use, so that the hardware integration level can be obviously improved, the software design complexity is reduced, and the reliability of monitoring data is improved.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a flow chart of the overall design of BMC software of the GD32 single chip microcomputer;
fig. 3 is a flow chart of the GD32 single chip microcomputer acquiring data through a PMBUS interface.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
The noun explains:
BMC: and the base board Management Controller is used for reading the sensor data and realizing the function of the IPMI protocol.
I2C: and the synchronous serial communication bus is used for IPMI protocol communication between BMC chips and communication between BMC and the PMBUS interface module.
IPMI: intelligent Platform Management Interface is a protocol capable of monitoring the running state of equipment.
PMBUS: and the Power Management Bus protocol is used for communication between the BMC chip and the Power module.
The invention provides a PMBUS interface power supply board card based on a GD32 single-chip microcomputer, and provides a perfect PMBUS module data reading mode and a BMC control method. Firstly, functional requirements of a power supply board card and a hardware design scheme are introduced. And secondly, introducing the whole design flow of realizing the BMC function by GD32 single-chip microcomputer software. And thirdly, reading the data of the power module of the PMBUS interface at GD32, and converting the data according to a protocol for realizing the PMBUS to obtain the data of the power supply voltage, the power supply current and the working temperature. And fourthly, aiming at the problem of unstable I2C communication, proposing a targeted software fault-tolerant processing method in the aspects of error interruption, transmission timeout, error monitoring bits and the like.
Firstly, functional requirements of a power supply board card and a hardware design scheme are introduced.
The power supply board card converts an input alternating current 220V power supply into a direct current 12V power supply to be output, and has an IPMI protocol management function. The power supply board card comprises a PMBUS interface power supply module, a GD32 single chip microcomputer, an auxiliary circuit and the like, the power supply module is responsible for alternating current-direct current conversion, an alternating current 220V power supply is input, a direct current 12V power supply is output, the GD32 single chip microcomputer is provided with 2 paths of I2C communication interfaces, the 1 st path is connected with the power supply module, information such as power supply voltage, power supply current and working temperature is read from the power supply module through a PMBUS protocol, the 2 nd path of I2C is connected with an external management board card, and monitoring information is reported to the management board card through an IPMI protocol.
And secondly, introducing GD32 single-chip microcomputer software to realize the overall design process of the power panel BMC. As shown in fig. 2.
2, initializing an S11 singlechip and a GD32 singlechip 2-path I2C controller, and configuring parameters such as communication baud rate and the like;
the S12 and GD32 singlechips send enabling signals to the PMBUS interface power module;
s13, receiving IPMI request information from the management board card in a polling way;
s14, judging whether the IPMI request message checksum is correct, if so, switching to the step S15, and if not, resetting the I2C controller, and switching to the step S13;
s15, analyzing IPMI protocol request data in the IPMI request message, and obtaining commands in the request data, wherein the commands are 3 in total, namely obtaining power supply voltage, obtaining power supply current and obtaining working temperature;
s16, according to the command in the request data, the single chip reads the monitoring data information from the PMBUS interface power module;
s17, generating IPMI protocol response data according to the IPMI protocol specification;
s18, sending IPMI protocol response data to the management board card, if the IPMI protocol response data is successfully sent, ending the polling process, if the IPMI protocol response data is failed, resetting the I2C controller, and going to the step S13.
And thirdly, introducing a method for reading the power supply voltage, the power supply current and the working temperature data of the power module by the GD32 singlechip through a PMBUS protocol. As shown in fig. 3.
S201, judging that an I2C controller in the GD32 single chip microcomputer is in an idle state, if the controller is idle, turning to the step S202, if the controller is busy, resetting the I2C controller, and turning to the step S202;
s202, generating an I2C bus starting signal;
s203, sending a PMBUS module address on the I2C bus, judging whether an ACK response fed back by the PMBUS module is received or not, if the response is received, turning to the step S204, and if the response is not received, turning to the step S201;
s204, sending command word data to the PMBUS module on the I2C bus, wherein the command word is reading power supply voltage, reading power supply current or reading working temperature;
s205, regenerating an I2C bus starting signal;
s206, sending a PMBUS module address on the I2C bus, judging whether an ACK response fed back by the PMBUS module is received or not, if the response is received, turning to the step S207, and if the response is not received, returning to the step S201;
s207, receiving sensor monitoring data fed back by the PMBUS module;
s208, generating an I2C bus stop signal;
s209, judging whether the sensor monitoring data checksum received from the PMBUS module is correct, if so, turning to the step S210, and if not, discarding the data;
and S210, analyzing the monitoring data of the sensor to obtain the power supply voltage, the power supply current or the working temperature of the power supply module.
And fourthly, aiming at the problem of unstable I2C bus communication, aiming at fault-tolerant processing methods of software in the aspects of error interruption, transmission overtime, error monitoring bits and the like.
1. Counting four I2C error interrupts of a GD32 single chip microcomputer I2C, such as response missing, receiving overflowing, arbitration losing and bus error, judging that an I2C bus is abnormal when the error counts are accumulated for 10 times, and resetting the I2C controller;
2. when the GD32 single-chip microcomputer sends I2C data, after the bus is judged to be in an idle state, a starting signal is generated, and data sending operation is carried out, polling state zone bit judgment is carried out, if the zone bit is not normally set for more than 30ms, the I2C bus is judged to be abnormal, and I2C controller resetting operation is carried out;
3. the GD32 singlechip is provided with an independent timer, monitors the busy flag bit of the I2C controller at 1ms periodic intervals, judges that the I2C bus is abnormal if the busy flag bit of the I2C controller is 1 in 30 continuous periods, and resets the I2C controller operation.
The design scheme of the novel power board card adopts a PMBUS interface power module. The PMBUS interface power module has the functions of alternating current-direct current conversion and sensor monitoring, the GD32 single-chip microcomputer serves as a BMC, and monitoring information such as power supply voltage, power supply current, working temperature and fault alarm is directly read from the PMBUS interface power module through a PMBUS protocol. According to the scheme, the hardware integration level is improved, the software design complexity is reduced, and the reliability of the monitoring data is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a PMBUS interface power integrated circuit board based on GD32 singlechip, a serial communication port, this power integrated circuit board includes PMBUS interface power module and GD32 singlechip, power module is responsible for alternating current-direct current conversion, the GD32 singlechip has 2 way I2C communication interfaces, the 1 st way is connected with PMBUS interface power module, read power supply voltage, supply current and operating temperature from PMBUS interface power module with the PMBUS agreement, the 2 nd way I2C is connected with outside management integrated circuit board, report monitoring information to the management integrated circuit board with IPMI agreement mode.
2. The PMBUS interface power supply board card based on the GD32 single-chip microcomputer of claim 1, wherein an input AC 220V power supply of the power supply module outputs a DC 12V power supply.
3. The power board card based PMBUS interface BMC control method based on the GD32 single chip microcomputer of claim 1 or 2, characterized by comprising the following steps:
the method comprises the following steps that 2-path I2C controllers of an S11 single chip microcomputer and a GD32 single chip microcomputer are initialized, and communication baud rate parameters are configured;
the S12 and GD32 singlechips send enabling signals to the PMBUS interface power module;
s13, receiving IPMI request information from the management board card in a polling way;
s14, judging whether the IPMI request message checksum is correct, if so, switching to the step S15, if not, resetting the I2C controller, and switching to the step S13;
s15, analyzing IPMI protocol request data in the IPMI request message, and obtaining commands in the request data, wherein the commands are 3 in total, namely obtaining power supply voltage, obtaining power supply current and obtaining working temperature;
s16, according to the command in the request data, the GD32 single chip microcomputer reads monitoring data information from the PMBUS interface power module;
s17, generating IPMI protocol response data according to the IPMI protocol specification;
s18, sending IPMI protocol response data to the management board card, if the IPMI protocol response data is successfully sent, ending the polling process, if the IPMI protocol response data is failed, resetting the I2C controller, and going to the step S13.
4. The PMBUS interface BMC control method based on the GD32 single chip microcomputer as claimed in claim 3, wherein four I2C error interrupts of response missing, reception overflowing, arbitration losing and bus error of the GD32 single chip microcomputer I2C are counted, when the error count is accumulated up to 10 times, it is determined that the I2C bus is abnormal, and the I2C controller is reset to operate.
5. The method as claimed in claim 3, wherein the GD32 single chip microcomputer based PMBUS interface BMC control method is characterized in that, when the GD32 single chip microcomputer sends I2C data, after the bus idle state is judged, the start signal is generated, and the data sending operation is performed, the polling state flag bit is judged, if the flag bit is not normally set for more than 30ms, the I2C bus is judged to be abnormal, and the I2C controller is reset to operate.
6. The method as claimed in claim 3, wherein the GD32 single chip microcomputer based PMBUS interface BMC control method is characterized in that the GD32 single chip microcomputer is provided with an independent timer, the I2C controller busy flag is monitored at 1ms cycle interval, if the I2C bus is determined to be abnormal by continuously monitoring 30 cycles busy flag position 1, the I2C controller is reset to operate.
7. The power board card based PMBUS interface BMC control method based on the GD32 single chip microcomputer of claim 1 or 2, characterized by comprising the following steps:
s201, judging that an I2C controller in the GD32 single chip microcomputer is in an idle state, if the controller is idle, turning to the step S202, if the controller is busy, resetting the I2C controller, and turning to the step S202;
s202, generating an I2C bus starting signal;
s203, sending a PMBUS module address on the I2C bus, judging whether an ACK response fed back by the PMBUS module is received or not, if the response is received, turning to the step S204, and if the response is not received, turning to the step S201;
s204, sending command word data to the PMBUS module on the I2C bus, wherein the command word is reading power supply voltage, reading power supply current or reading working temperature;
s205, regenerating an I2C bus starting signal;
s206, sending a PMBUS module address on the I2C bus, judging whether an ACK response fed back by the PMBUS module is received or not, if the response is received, turning to the step S207, and if the response is not received, returning to the step S201;
s207, receiving sensor monitoring data fed back by the PMBUS module;
s208, generating an I2C bus stop signal;
s209, judging whether the sensor monitoring data checksum received from the PMBUS module is correct, if so, turning to the step S210, and if not, discarding the data;
and S210, analyzing the monitoring data of the sensor to obtain the power supply voltage, the power supply current or the working temperature of the power supply module.
8. The method as claimed in claim 7, wherein the I2C fault interrupts of the GD32 single chip microcomputer I2C responding missing, receiving overflow, arbitration lost and bus error are counted, when the error count reaches 10 times, it is determined that the I2C bus is abnormal, and the I2C controller is reset.
9. The method as claimed in claim 7, wherein the GD32 single chip microcomputer based PMBUS interface BMC control method is characterized in that when the GD32 single chip microcomputer transmits I2C data, after the bus idle state is judged, a start signal is generated, and data transmission operation is performed, a polling state flag bit is judged, if the flag bit is not normally set for more than 30ms, it is judged that the I2C bus is abnormal, and the I2C controller is reset to operate.
10. The method as claimed in claim 7, wherein the GD32 single chip microcomputer based PMBUS interface BMC control method is characterized in that the GD32 single chip microcomputer is provided with an independent timer, the I2C controller busy flag is monitored at 1ms cycle interval, if the I2C bus is determined to be abnormal if the busy flag is continuously set at position 1 for 30 cycles, the I2C controller is reset to operate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210374598.5A CN114816020A (en) | 2022-04-11 | 2022-04-11 | GD32 single-chip microcomputer-based PMBUS interface power board and BMC control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210374598.5A CN114816020A (en) | 2022-04-11 | 2022-04-11 | GD32 single-chip microcomputer-based PMBUS interface power board and BMC control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114816020A true CN114816020A (en) | 2022-07-29 |
Family
ID=82535124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210374598.5A Pending CN114816020A (en) | 2022-04-11 | 2022-04-11 | GD32 single-chip microcomputer-based PMBUS interface power board and BMC control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114816020A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477403A (en) * | 2009-01-22 | 2009-07-08 | 浪潮电子信息产业股份有限公司 | Automatic control method for system power consumption |
| CN204229148U (en) * | 2014-09-14 | 2015-03-25 | 重庆电讯职业学院 | A kind of simple and easy digital control power-supply system |
| US20160011887A1 (en) * | 2014-07-09 | 2016-01-14 | International Business Machines Corporation | Firmware Update Method and Power System Thereof |
| CN112859711A (en) * | 2021-02-07 | 2021-05-28 | 航天科工空间工程发展有限公司 | Spacecraft CAN bus autonomous switching processing system and method |
| CN113254247A (en) * | 2021-05-14 | 2021-08-13 | 山东英信计算机技术有限公司 | Server BMC I2C exception recovery method and related device |
| CN113311754A (en) * | 2021-05-26 | 2021-08-27 | 华东计算技术研究所（中国电子科技集团公司第三十二研究所） | BMC management system of power module based on GD32 singlechip |
-
2022
- 2022-04-11 CN CN202210374598.5A patent/CN114816020A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477403A (en) * | 2009-01-22 | 2009-07-08 | 浪潮电子信息产业股份有限公司 | Automatic control method for system power consumption |
| US20160011887A1 (en) * | 2014-07-09 | 2016-01-14 | International Business Machines Corporation | Firmware Update Method and Power System Thereof |
| CN204229148U (en) * | 2014-09-14 | 2015-03-25 | 重庆电讯职业学院 | A kind of simple and easy digital control power-supply system |
| CN112859711A (en) * | 2021-02-07 | 2021-05-28 | 航天科工空间工程发展有限公司 | Spacecraft CAN bus autonomous switching processing system and method |
| CN113254247A (en) * | 2021-05-14 | 2021-08-13 | 山东英信计算机技术有限公司 | Server BMC I2C exception recovery method and related device |
| CN113311754A (en) * | 2021-05-26 | 2021-08-27 | 华东计算技术研究所（中国电子科技集团公司第三十二研究所） | BMC management system of power module based on GD32 singlechip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102521187B (en) | Method for solving communication deadlock of I2C (Inter-Integrated Circuit) bus | |
| CN102984059B (en) | Gigabit Ethernet redundancy network interface card and link switching condition criterion output control method thereof | |
| EP0520769A2 (en) | Computer system manager | |
| EP3957966A1 (en) | Daisy chain two-wire sensor measurement system and measurement method therefor | |
| CN208834293U (en) | One kind is mostly from control module automatic addressing device | |
| JP2012123537A (en) | Computer system | |
| US8271816B2 (en) | System and method for statistics recording of power devices | |
| CN112882901A (en) | Intelligent health state monitor of distributed processing system | |
| CN101354268A (en) | Intelligent transmitter and safety device based on monostable circuit | |
| CN114816020A (en) | GD32 single-chip microcomputer-based PMBUS interface power board and BMC control method thereof | |
| CN201594223U (en) | Network main board, computer and computer network system | |
| EP2693617B1 (en) | Power supply apparatus, processing apparatus, information processing system, and method for controlling power supply | |
| CN110719147B (en) | High-reliability dual-computer hot standby data acquisition method based on LoRa | |
| CN1835322A (en) | Power supply method of communicator and monitoring module | |
| CN102290864B (en) | Method and device for implementing virtual load management terminal | |
| CN111538626A (en) | Method for releasing from I2C equipment | |
| CN207318674U (en) | Battery harvester | |
| CN1841435A (en) | Smoke and temperature inductive combined fire detector | |
| CN116137603A (en) | Link fault detection method and device, storage medium and electronic device | |
| CN102025565A (en) | I2C bus communication detection method used among multiple devices | |
| CN203587997U (en) | Multipath digital value input/output unit | |
| CN210776663U (en) | Bus management module | |
| JP2011227786A (en) | Microcomputer control system, charging device using the same and photovoltaic power supply system | |
| CN201203801Y (en) | Self-diagnosis system for equipment operation failure | |
| CN216016521U (en) | Uninterrupted power supply circuit and visible doorbell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |