CN112015256A - Design method of chassis management module based on embedded processor - Google Patents
Design method of chassis management module based on embedded processor Download PDFInfo
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- G—PHYSICS
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The invention relates to a design method of a chassis management module based on an embedded processor, belonging to the technical field of computers. The invention relates to a chassis management module design method based on an embedded processor, which realizes the state acquisition of each processing blade, SRIO switching blade and power blade in a radar signal data processing system, the screen display control of a display module on a system chassis, the acquisition and control of various input and output signals, the fan control and the like, and solves the management requirement of the radar signal data processing system on the system chassis by adopting the embedded processor.
Description
Technical Field
The invention belongs to the technical field of computers, and particularly relates to a design method of a chassis management module based on an embedded processor.
Background
In a traditional radar processing system, a fan control signal is generated by depending on a BMC module on a functional blade, so that the control of a fan on a case is realized. However, since the BMC module is usually powered by 3.3V or 5V and the power supply is isolated from the power supply used by the fan for safety reasons, the fan control signal generated by the BMC module requires an additional isolation device and cannot control the three-wire fan. In addition, as the design of the system chassis is gradually complex, the functions are increased, and the BMC module with higher integration level cannot provide additional functional interfaces. Therefore, an independent chassis management module needs to be designed in the system for controlling the fan and various peripherals on the chassis.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to design an independent case management module in the system is used for realizing the control of a fan and various peripheral devices on the case.
(II) technical scheme
In order to solve the technical problem, the invention provides a design method of a chassis management module based on an embedded processor, wherein in the method, the chassis management module is designed to comprise a power supply conditioning circuit, a processor, an on-off control circuit and a fan control circuit, and control objects of the chassis management module comprise a BMC (baseboard management controller), a serial port screen, a self-defined key, a buzzer and a timer;
the power supply conditioning circuit is designed to be realized by adopting a power supply conversion chip;
the on-off control circuit is designed to be used for controlling the power-on and power-off of the buzzer and the timer;
the power supply of the case management module is 48V and is respectively converted into 12V, 5V and 3.3V through the power conditioning circuit, wherein the 12V is used by the fan control circuit, the buzzer and the timer, the 5V is used by the serial port screen and the user-defined key, and the 3.3V is used by the processor;
the processor is designed to realize data communication and signal exchange between the chassis management module and each functional blade and between other modules in the chassis management module, complete control of the chassis fan and realize the main logic of the chassis management module; the processor is communicated with the BMC on each functional blade in the radar signal data processing system through two I2C isolation channels to acquire information and working states of the whole machine and the blades and monitor faults; the processor is connected with the serial port screen through an RS232 serial port, and prints basic information of the whole machine and the blades, working states of all the board cards, inserting and pulling information of the board cards, abnormal state information of the board cards, voltage, current and temperature information of all the board cards, a fan rotating speed and a wind speed control mode and the like through the serial port screen; the processor is connected with 4 user-defined keys through 8 paths of IO ports, the control of the 4 paths of keys and the state collection of the four paths of keys are included, the operation corresponding to the user-defined keys is customized according to the requirements of users, and the user-defined keys are used as control buttons of the serial port screen by default; the buzzer and the timer are communicated through an on-off control circuit; the processor outputs through 3 paths of PWM, converts the PWM into a driving signal required by the 48V fan after being conditioned by the fan control circuit, and acquires a feedback signal of the fan; the processor captures a fan feedback signal through 3 paths of input, and the signal is used as an input capture source after being enhanced by driving and is used for measuring the rotating speed of the fan.
Preferably, in the method, the processor is designed to transfer data with the BMC on the functional blade through an I2C bus, when the BMC sends data to the processor, an I2C interrupt in the processor is triggered, an interrupt service function analyzes the received data according to a communication protocol, and the sent voltage, temperature, current and operating state information are stored in corresponding storage spaces;
the method comprises the steps that a timer in a processor is used for generating timer interruption for refreshing a serial port screen state and memory space data, meanwhile, the timer interruption is used for carrying out input capture, fan feedback signals are counted, and fan speed is calculated;
the program in the processor adopts an interrupt response type structure, and the initialization function is used for initializing the peripheral and opening the interrupt; the method comprises the steps that a user-defined key state and a received BMC message are used as external interrupt sources, and after an interrupt is generated, an interrupt service function is entered to realize each preset function;
the user-defined key interface is set as an external interrupt source, an interrupt is generated after a key is pressed, and the user jumps to a corresponding interrupt service function to realize a function customized according to the user requirement;
the I2C interface is set to realize data exchange by adopting an interrupt mode, the interrupt service function only receives and transmits data, receives a frame of data and provides the data to the data processing function, and after the data is distinguished according to command words, executes corresponding control instructions or sends the transmitted information to a serial port screen for printing;
the RS232 interface is connected with the serial port screen, and the information of the whole machine or the blade is printed and the alarm is assisted through a serial port printing function;
a timer pin of the processor is selected as a PWM output interface, 3 paths of PWM waves of TTL level are output, and the duty ratio of the PWM waves is adjusted according to a received BMC instruction or temperature information of each part of the chassis to realize the control of the speed of the fan;
the input capturing interface selects a timer pin of the processor and is connected to a fan feedback line, after the fan rotates, the number of captured rising edges is counted, and the current fan rotating speed is calculated according to the number of the rising edges received in unit time.
Preferably, the fan control circuit is designed to adopt a bootstrap circuit to realize the control of the fan.
Preferably, the processor generates a 3.3V-level PWM wave, and converts the PWM wave into a PWM wave with a level of 48V, a frequency and a duty ratio the same as those of the preceding stage through the bootstrap circuit, so as to drive the fan to rotate, and the processor controls the wind speed of the fan by adjusting the frequency of the PWM wave.
Preferably, the bootstrap circuit is designed to be provided with two charging loops, the newly added charging loop adopts the rear end voltage as a power supply, a voltage regulator tube, a reverse diode and a resistor are matched in the loop to provide a second charging loop for the charging capacitor, and when the level of the output end is smaller than that of the rear end voltage, the charging capacitor starts to charge, so that the condition that the voltage of the output end is always larger than the charging voltage is avoided.
Preferably, in the chassis management module, three modes are designed to control the wind speed.
Preferably, in the chassis management module, the wind speed is controlled in three modes:
1) manual mode: a user can modify the wind speed jump temperature threshold value or directly set the rotating speed of the fan through a user-defined key to control the rotating speed of the fan;
2) open loop automatic control mode: the chassis management module adjusts the fan speed of the corresponding position according to the temperature of each functional blade, and realizes the open-loop automatic control of the wind speed by taking the temperature value as an adjustment standard;
3) closed-loop automatic control mode: the processor obtains a control loop PID parameter by using the PID closed-loop control algorithm, taking the change rate of the temperature of each blade as a feedback signal and taking the target value of the temperature and the temperature change rate as a reference value, and adjusts the change trend of the speed of the fan to realize the steady-state control of the temperature in the case.
Preferably, the on-off control circuit is designed to realize on-off control of each channel by adopting a Darlington tube ULN 2803.
Preferably, the processor is implemented by using a GD32F450IKH6 chip which is easy to innovate.
The invention also provides a chassis management module designed by the method.
(III) advantageous effects
The invention relates to a chassis management module design method based on an embedded processor, which realizes the state acquisition of each processing blade, SRIO switching blade and power blade in a radar signal data processing system, the screen display control of a display module on the system chassis, the acquisition and control of various input and output signals, fan control and the like.
Drawings
Fig. 1 is a schematic diagram of a hardware component of a chassis management module according to the present invention;
FIG. 2 is a skip view of a serial port screen interface of a chassis management module according to the present invention;
FIG. 3 is a flow chart of the operation of the chassis management module of the present invention;
FIG. 4 is a schematic diagram of a fan control circuit according to the present invention;
FIG. 5 is a schematic diagram of a conventional bootstrap circuit;
FIG. 6 is a schematic diagram of an improved bootstrap circuit of the present invention.
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 radar signal data processing system is composed of various functional blades and a case, and display and indication devices such as a serial port screen, a key, an indicator light and a buzzer are arranged on the case. The invention designs a case management module based on an embedded processor, which adopts the embedded processor to collect the health information of a functional blade and control various peripheral devices on a case so as to realize the management function of the case of a radar signal data processing system.
As shown in fig. 1, the invention designs a chassis management module based on an embedded processor, which comprises a power supply conditioning circuit, a processor, an on-off control circuit and a fan control circuit, wherein the control objects of the chassis management module comprise a BMC, a serial port screen, a custom button, a buzzer and a timer;
the power supply conditioning circuit is realized by adopting a power supply conversion chip;
the on-off control circuit is used for controlling the power-on and power-off of the buzzer and the timer, and realizes the on-off control of each channel by adopting a Darlington tube ULN 2803;
the power supply of the case management module is 48V and is respectively converted into 12V, 5V and 3.3V through the power conditioning circuit, wherein the 12V is used by the fan control circuit, the buzzer and the timer, the 5V is used by the serial port screen and the user-defined key, and the 3.3V is used by the processor;
the processor selects a GD32F450IKH6 chip which is easy to innovate and is used for realizing data communication and signal exchange between the chassis management module and each functional blade and other modules in the chassis management module, and completing the control of the chassis fan to realize the main logic of the chassis management module; the processor is communicated with the BMC on each functional blade in the radar signal data processing system through two I2C isolation channels to acquire information and working states of the whole machine and the blades and monitor faults; the processor is connected with the serial port screen through an RS232 serial port, and prints basic information of the whole machine and the blades, working states of all the board cards, inserting and pulling information of the board cards, abnormal state information of the board cards, voltage, current and temperature information of all the board cards, a fan rotating speed and a wind speed control mode and the like through the serial port screen; the processor is connected with 4 user-defined keys through 8 paths of IO ports, the control of the 4 paths of keys and the state collection of the four paths of keys are included, the corresponding operation of the user-defined keys is customized according to the requirement of a user, and the user-defined keys are used as control buttons (up, down, confirmation and return) of the serial port screen by default; the buzzer and the timer are communicated through an on-off control circuit; the processor outputs through 3 paths of PWM, converts the PWM into a driving signal required by the 48V fan after being conditioned by the fan control circuit, and acquires a feedback signal of the fan; the processor captures a fan feedback signal through 3 paths of input, and the signal is used as an input capture source after being enhanced by driving and is used for measuring the rotating speed of the fan.
And the chassis management module prints basic information of the module through the serial port screen. The serial port screen adopts V0076-FA-002 of Wenxinuo corporation, and can adopt serial port commands to load word stock, pictures and functional plug-in design interfaces. The processor displays different interfaces on the serial port screen through serial port commands according to the external key state, the health information of each functional blade in the case, the fan state and the like.
And designing a serial port screen interface according to system requirements. The serial port screen interface is divided into a starting-up starting interface, a slot position state interface, a fan speed control interface, a temperature threshold value setting interface, a power supply blade interface, a computing blade interface, a switching blade interface, a case menu interface and the like. The user can control each option in the interface through the external keys, jump among the interfaces and realize the control of the functions of the case.
According to the characteristics of the interface, the method is divided into two types: a fixed interface and a real-time refresh interface.
The fixed interface comprises a starting-up starting interface, a temperature threshold setting interface and a case menu interface. After the interface is sent to the serial port screen for display, the displayed picture does not need to be refreshed before the next external trigger source for changing the interface display comes.
The instant refreshing interface comprises a slot position state interface, a fan speed control interface, a power supply blade interface, a calculating blade interface and an exchanging blade interface. After the interface is sent to a serial port screen for display, the interface needs to be refreshed according to a fixed time frequency before a next trigger source for changing the interface display comes.
The jump relationship between the interfaces is shown in fig. 2.
And data are transmitted between the case management module and the BMC on the functional blade through the IIC bus. The IIC interrupt within the processor is triggered when the BMC sends data to the chassis management module. The interrupt service function analyzes the received data according to a communication protocol, and stores the transmitted voltage, temperature, current and working state information in corresponding storage spaces.
In order to enable the chassis management module to realize various functions according to fixed time frequency, a timer in the processor is used for generating timer interruption for refreshing the state of the serial port screen, refreshing storage space data and the like. Meanwhile, the timer is interrupted to carry out input capture, and the fan feedback signals are counted for calculating the speed of the fan.
The chassis management module workflow diagram is shown in fig. 3.
The functions are divided into an initialization function and an interrupt service function. The program adopts an interrupt response type structure, and the initialization function is used for initializing the peripheral and opening the interrupt; the key state is customized, the BMC message is received and is used as an external interrupt source, and after an interrupt is generated, an interrupt service function is entered, so that each preset function is realized.
The user-defined key interface is set as an external interrupt source, an interrupt is generated after a key is pressed, and the user jumps to a corresponding interrupt service function to realize a function customized according to the user requirement;
the I2C interface is set to realize data exchange by adopting an interrupt mode, the interrupt service function only receives and transmits data, receives a frame of data and provides the data to the data processing function, and after the data is distinguished according to command words, executes corresponding control instructions or sends the transmitted information to a serial port screen for printing;
the RS232 interface is connected with the serial port screen, and the information of the whole machine or the blade is printed and the alarm is assisted through a serial port printing function;
a timer pin of GD32F450 is selected as a PWM output interface, 3 paths of PWM waves of TTL level are output, and the duty ratio of the PWM waves is adjusted according to a received BMC instruction or temperature information of each part of the chassis to realize the control of the speed of the fan;
and the input capturing interface selects a timer pin of GD32F450 and is connected to a fan feedback line, the number of captured rising edges is counted after the fan rotates, and the current fan rotating speed is calculated according to the number of the rising edges received in unit time.
A bootstrap circuit is adopted in the fan control circuit to realize the control of the fan. The processor generates a PWM wave with a 3.3V level, and the PWM wave is converted into the PWM wave with a level of 48V, a frequency and a duty ratio which are the same as those of a preceding stage through the bootstrap circuit and is used for driving the fan to rotate. The processor realizes the wind speed control of the fan by adjusting the frequency of the PWM wave.
The conventional bootstrap circuit is provided with only one charging loop. As shown in fig. 5, a bootstrap circuit with a front end voltage of 12V is built by using IRF2117, when a VS end voltage is less than 12V, a capacitor C1 starts to charge through a loop shown in fig. 6, and a capacitor discharge voltage and an output voltage are superimposed through a bootstrap boost capacitor to provide a required starting voltage for the MOS transistor.
In practical application, when the back end voltage is much higher than the front end voltage, the capacitor cannot be charged and the circuit cannot work normally. This is because the load of the circuit is often an inductive or capacitive load, and when the MOS transistor is turned off, the level of the output terminal of the bootstrap circuit cannot return to the low level immediately, even the voltage of the output terminal is always greater than the voltage of the front terminal. At the moment, the charging capacitor cannot be charged, so that the MOS tube cannot be conducted and the circuit fails.
In the invention, the circuit fault is avoided by adding a charging loop. As shown in fig. 6, the newly added charging circuit uses the back end voltage as the power supply, and a second charging circuit is provided for the charging capacitor by using the cooperation of the voltage regulator, the reverse diode and the resistor. At this time, when the level of the output end is smaller than the voltage of the back end, the charging capacitor starts to charge, and the condition that the voltage of the output end is always larger than the charging voltage is avoided. SI7850 in fig. 4 corresponds to the MOS transistor in fig. 6.
In the present invention, three modes are used to control the wind speed.
1) Manual mode. A user can modify the wind speed jump temperature threshold value or directly set the rotating speed of the fan through a user-defined key to control the rotating speed of the fan.
2) Open loop automatic control mode. The chassis management module adjusts the fan speed of the corresponding position according to the temperature of each functional blade, and realizes the open-loop automatic control of the wind speed by taking the temperature value as the adjustment standard.
3) Closed loop automatic control mode. The processor obtains a control loop PID parameter by using a PID closed-loop control algorithm, taking the change rate of the temperature of each blade as a feedback signal and taking the target value of the temperature plus the temperature change rate as a reference value, and adjusts the change trend of the speed of the fan to realize the steady-state control of the temperature in the case.
The invention has been applied to high-performance radar signal data processing computers. And (3) manufacturing the case management module meeting the requirements by adopting an embedded processor. The module can obtain the information of temperature, voltage, current, power, working state and the like of each functional board card in the computer through data communication; the user-defined key state on the chassis can be collected, and the key function can be customized according to the user requirement; output devices such as a buzzer, an indicator light and the like can be controlled, and functions of state indication, warning and the like are realized; the wind speed control of the fan can be realized by adopting various modes; health information, fan state and the like of the functional blades in the computer can be displayed through the serial port screen. The invention meets the requirement of realizing state management of the whole radar signal data processing computer in a working state.
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. A design method of a chassis management module based on an embedded processor is characterized in that in the method, the chassis management module is designed to comprise a power supply conditioning circuit, a processor, an on-off control circuit and a fan control circuit, and a control object of the chassis management module comprises a BMC (baseboard management controller), a serial port screen, a self-defined key, a buzzer and a timer;
the power supply conditioning circuit is designed to be realized by adopting a power supply conversion chip;
the on-off control circuit is designed to be used for controlling the power-on and power-off of the buzzer and the timer;
the power supply of the case management module is 48V and is respectively converted into 12V, 5V and 3.3V through the power conditioning circuit, wherein the 12V is used by the fan control circuit, the buzzer and the timer, the 5V is used by the serial port screen and the user-defined key, and the 3.3V is used by the processor;
the processor is designed to realize data communication and signal exchange between the chassis management module and each functional blade and between other modules in the chassis management module, complete control of the chassis fan and realize the main logic of the chassis management module; the processor is communicated with the BMC on each functional blade in the radar signal data processing system through two I2C isolation channels to acquire information and working states of the whole machine and the blades and monitor faults; the processor is connected with the serial port screen through an RS232 serial port, and prints basic information of the whole machine and the blades, working states of all the board cards, inserting and pulling information of the board cards, abnormal state information of the board cards, voltage, current and temperature information of all the board cards, a fan rotating speed and a wind speed control mode and the like through the serial port screen; the processor is connected with 4 user-defined keys through 8 paths of IO ports, the control of the 4 paths of keys and the state collection of the four paths of keys are included, the operation corresponding to the user-defined keys is customized according to the requirements of users, and the user-defined keys are used as control buttons of the serial port screen by default; the buzzer and the timer are communicated through an on-off control circuit; the processor outputs through 3 paths of PWM, converts the PWM into a driving signal required by the 48V fan after being conditioned by the fan control circuit, and acquires a feedback signal of the fan; the processor captures a fan feedback signal through 3 paths of input, and the signal is used as an input capture source after being enhanced by driving and is used for measuring the rotating speed of the fan.
2. The design method of claim 1, wherein the processor is designed to communicate data with the BMC of the functional blade through an I2C bus, when the BMC sends data to the processor, an I2C interrupt in the processor is triggered, the interrupt service function parses the received data according to a communication protocol, and stores the sent voltage, temperature, current, and operating state information in the corresponding storage space;
the method comprises the steps that a timer in a processor is used for generating timer interruption for refreshing a serial port screen state and memory space data, meanwhile, the timer interruption is used for carrying out input capture, fan feedback signals are counted, and fan speed is calculated;
the program in the processor adopts an interrupt response type structure, and the initialization function is used for initializing the peripheral and opening the interrupt; the method comprises the steps that a user-defined key state and a received BMC message are used as external interrupt sources, and after an interrupt is generated, an interrupt service function is entered to realize each preset function;
the user-defined key interface is set as an external interrupt source, an interrupt is generated after a key is pressed, and the user jumps to a corresponding interrupt service function to realize a function customized according to the user requirement;
the I2C interface is set to realize data exchange by adopting an interrupt mode, the interrupt service function only receives and transmits data, receives a frame of data and provides the data to the data processing function, and after the data is distinguished according to command words, executes corresponding control instructions or sends the transmitted information to a serial port screen for printing;
the RS232 interface is connected with the serial port screen, and the information of the whole machine or the blade is printed and the alarm is assisted through a serial port printing function;
a timer pin of the processor is selected as a PWM output interface, 3 paths of PWM waves of TTL level are output, and the duty ratio of the PWM waves is adjusted according to a received BMC instruction or temperature information of each part of the chassis to realize the control of the speed of the fan;
the input capturing interface selects a timer pin of the processor and is connected to a fan feedback line, after the fan rotates, the number of captured rising edges is counted, and the current fan rotating speed is calculated according to the number of the rising edges received in unit time.
3. The design method of claim 1, wherein the fan control circuit is designed to use a bootstrap circuit to achieve control of the fan.
4. The design method of claim 3, wherein the processor generates a PWM wave with a level of 3.3V, and converts the PWM wave into a PWM wave with a level of 48V, a frequency and a duty ratio the same as those of the previous stage through the bootstrap circuit, and the PWM wave is used for driving the fan to rotate, and the processor controls the wind speed of the fan by adjusting the frequency of the PWM wave.
5. The design method of claim 4, wherein the bootstrap circuit is designed to have two charging loops, the added charging loop uses the back end voltage as power supply, the loop uses the voltage regulator tube, the backward diode and the resistor to cooperate to provide a second charging loop for the charging capacitor, when the output end level is less than the back end voltage, the charging capacitor starts to charge, avoiding the condition that the output end voltage is always greater than the charging voltage.
6. The design method according to claim 1, wherein in the chassis management module, it is designed to control the wind speed in three modes.
7. The design method according to claim 6, wherein in the chassis management module, three modes are adopted to control the wind speed, specifically:
1) manual mode: a user can modify the wind speed jump temperature threshold value or directly set the rotating speed of the fan through a user-defined key to control the rotating speed of the fan;
2) open loop automatic control mode: the chassis management module adjusts the fan speed of the corresponding position according to the temperature of each functional blade, and realizes the open-loop automatic control of the wind speed by taking the temperature value as an adjustment standard;
3) closed-loop automatic control mode: the processor obtains a control loop PID parameter by using the PID closed-loop control algorithm, taking the change rate of the temperature of each blade as a feedback signal and taking the target value of the temperature and the temperature change rate as a reference value, and adjusts the change trend of the speed of the fan to realize the steady-state control of the temperature in the case.
8. The design method of claim 1, wherein the on-off control circuit is designed to use darlington ULN2803 to implement on-off control of each channel.
9. The design method as claimed in claim 1, wherein the processor is implemented using a GD32F450IKH6 chip.
10. A chassis management module designed using the method of any one of claims 1 to 9.
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| CN112925245B (en) * | 2021-01-27 | 2023-02-03 | 北京计算机技术及应用研究所 | VPX specification-based intelligent management interface module |
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| CN112015256B (en) | 2024-05-28 |
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