CN111140530A - Method for realizing SoC fan control under bootloader and SoC applying same - Google Patents
Method for realizing SoC fan control under bootloader and SoC applying same Download PDFInfo
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- CN111140530A CN111140530A CN201911421210.7A CN201911421210A CN111140530A CN 111140530 A CN111140530 A CN 111140530A CN 201911421210 A CN201911421210 A CN 201911421210A CN 111140530 A CN111140530 A CN 111140530A
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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
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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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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- 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
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides a method for realizing SoC fan control under a bootloader and a SoC applying the method, and solves the problems that extra fan controllers are needed for SoC fan control in the prior art, and the hardware and software cost development is high. The method for realizing SoC fan control under the bootloader comprises the following steps: the SoC executes the configuration of a fan rotating speed register in the bootloader to drive the fan; the SoC judges whether the current rotating speed of the fan reaches the set rotating speed in the fan rotating speed sampling register; if not, the SoC executes the configuration of the fan rotating speed register updated by the bootloader along the target direction; wherein the goal is to make the current rotational speed of the fan equal to the set rotational speed.
Description
Technical Field
The invention relates to the technical field of SOC fan control, in particular to a method for realizing SoC fan control under a bootloader and an SoC applying the same.
Background
The SoC fan is used for heat dissipation, namely, the heat on the SoC is conducted and blown to the air by the fan, so that the temperature of the SoC chip is reduced, and the heat dissipation effect of the SoC can be influenced by the configuration of the rotating speed of the fan and the actual rotating speed of the fan.
In the prior art, a fan is controlled by a fan controller outside the SoC to dissipate heat. The problem with this is that, on the one hand, additional fan controllers are required, making the overall hardware design complex and increasing the cost; on the other hand, since there are various types of external fan controllers, a software developer needs to refer to a data manual for specific development, which results in high development cost.
Therefore, in view of the above technical problems, it is necessary to provide a method for implementing SoC fan control under bootloader.
Disclosure of Invention
In view of the above, the present invention provides a method for implementing SoC fan control under a bootloader and an SoC applying the same.
In order to achieve the above object, an embodiment of the present invention provides the following technical solutions:
a method for realizing SoC fan control under a bootloader comprises the following steps:
the SoC executes the configuration of a fan rotating speed register in the bootloader to drive the fan;
the SoC judges whether the current rotating speed of the fan reaches a set rotating speed in a fan rotating speed sampling register; if not, the user can not select the specific application,
the SoC executes the configuration of the bootloader about the fan rotating speed register updated along the target direction; wherein the target is to make the current rotation speed of the fan equal to the set rotation speed.
In one embodiment, the configuration of the fan speed register includes:
a fan control enable signal configuration to be executed to allow the SoC to generate a fan speed control signal;
a signal period configuration for being executed to configure a period of the rotational speed control signal;
and the high-level configuration in the period is used for being executed to configure the period ratio of the high-level signal in the period of the rotating speed control signal.
In one embodiment, updating the configuration of the fan speed register by the bootloader along the target direction includes:
if the current rotating speed of the fan is less than the set rotating speed, the cycle ratio of the high-level signal in the period of the rotating speed control signal is increased; and/or the presence of a gas in the gas,
and if the current rotating speed of the fan is greater than the set rotating speed, reducing the cycle ratio of the high-level signal in the period of the rotating speed control signal.
In one embodiment, the fan control enable signal configures a corresponding register field;
the register field configuration corresponding to the signal period configuration is 1000;
the register field configuration corresponding to the high level configuration in the period is 500.
In one embodiment, the method further comprises:
the SOC detects a speed mark signal output by the fan, determines the current rotating speed of the fan according to the cycle ratio of a high-level signal in the speed mark signal cycle, and stores the current rotating speed in the fan rotating speed sampling register.
The application also provides an SOC based on bootloader realizes fan control, the SOC is used for:
executing the configuration of a fan rotating speed register in the bootloader to drive the fan;
judging whether the current rotating speed of the fan in the fan rotating speed sampling register reaches a set rotating speed or not; if not, the user can not select the specific application,
executing the configuration of the bootloader about the fan rotating speed register updated along the target direction; wherein the target is to make the current rotation speed of the fan equal to the set rotation speed.
In one embodiment, the configuration of the fan speed register includes:
a fan control enable signal configuration to be executed to allow the SoC to generate a fan speed control signal;
a signal period configuration for being executed to configure a period of the rotational speed control signal;
and the high-level configuration in the period is used for being executed to configure the period ratio of the high-level signal in the period of the rotating speed control signal.
In an embodiment, the SoC is specifically configured to:
if the current rotating speed of the fan is less than the set rotating speed, the cycle ratio of the high-level signal in the period of the rotating speed control signal is increased; and/or the presence of a gas in the gas,
and if the current rotating speed of the fan is greater than the set rotating speed, reducing the cycle ratio of the high-level signal in the period of the rotating speed control signal.
In one embodiment, the fan control enable signal configures a corresponding register field;
the register field configuration corresponding to the signal period configuration is 1000;
the register field configuration corresponding to the high level configuration in the period is 500.
In an embodiment, the SoC is further configured to detect a rate flag signal output by the fan, determine a current rotation speed of the fan according to a cycle ratio of a high level signal in a cycle of the rate flag signal, and store the current rotation speed in the fan rotation speed sampling register.
In the embodiment of the application, the SoC realizes the control function of the fan through the configuration of utilizing the bootloader code, and does not need to use an extra fan controller, so that the hardware cost and the software development cost are reduced, and the SoC can detect whether the current rotating speed of the fan reaches the expectation through sampling, so that the regulation and control of the rotating speed of the fan are realized, the control effect of the SoC fan is optimized, and the stable and reliable work of SoC hardware is ensured.
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, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart illustrating a method for implementing SoC fan control under a bootloader according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a fan speed control signal in a method for implementing SoC fan control under a bootloader according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of an SOC for implementing fan control based on bootloader according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. 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.
Referring to fig. 1, a specific embodiment of the method for implementing SoC fan control under bootloader according to the present application is described. In this embodiment, the method comprises:
s11, the SoC executes the configuration of the bootloader about the fan speed register to drive the fan.
The embedded SOC typically integrates a ROM on chip, and the ROM is solidified with a piece of boot Code, which is commonly referred to as ROM Code. After the CPU is reset, the ROM Code is executed first, and ROM Co de is responsible for loading the boot Code of the next stage from the external storage device, which is generally called bootloader.
In this embodiment, the configuration of the fan speed register includes a fan control enable signal configuration, a signal period configuration, and a high level in period configuration. The fan control enable signal is configured to be executed to allow the SoC to generate a speed control signal for the fan, the signal period is configured to be executed to configure a period of the speed control signal, and the high level in the period is configured to be executed to configure a period duty ratio of the high level signal in the speed control signal period.
Referring to fig. 2, in an actual configuration, the 3 configurations described above with respect to the fan speed register correspond to 3 fields in the fan speed register. The field 1 corresponds to the fan control enable signal, and only configured to allow the SoC to generate an output square wave signal when executing. The field 2 corresponds to the period of the rotation speed control signal, which is actually the period of the configuration square wave signal (period T part in fig. 2), specifically the number of reference clocks for performing fan control by configuring the SoC. The field 3 corresponds to the ratio of the period of the high-level signal in the period of the rotation speed control signal, and is actually the length of the high level in the configuration square wave signal (the portion of the high level t in fig. 2), and specifically the number of reference clocks for executing fan control by configuring the SoC.
In an exemplary embodiment, the SoC may perform the square wave signal generation by configuring the corresponding register field set by the fan control enable signal. The signal period configuration corresponds to a register field configuration of 1000, and the SoC can output a square wave signal with a period of 1000 reference clock periods for SoC fan control, that is, 1000 × (1/1Mhz) ═ 1 ms. The high level in the period is configured to be 500, and the length of the high level in the square wave signal that the SoC can output is 500 reference clock periods for SoC fan control, that is, 500 × 500us (1/1 Mhz).
S12, judging whether the current rotating speed of the fan in the fan rotating speed sampling register reaches the set rotating speed by the SoC; if not, go to S13.
The set rotation speed may refer to a set fan rotation speed interval, rather than a constant value. Specifically, the SOC detects a rate flag signal output by the fan, determines the current rotation speed of the fan according to the cycle ratio of the high-level signal in the period of the rate flag signal, and stores the current rotation speed in the fan rotation speed sampling register. The process of SoC fan speed sampling is essentially included here, and the SoC is connected to the pin of fan speed sampling on the hardware, so as to obtain the speed mark signal output by the fan.
In one embodiment, the fan output rate flag signal is also a periodic square wave signal.
S13, the SoC executes the configuration of the bootloader about the fan rotating speed register updated along the target direction; wherein the target is to make the current rotation speed of the fan equal to the set rotation speed.
Specifically, if the current rotating speed of the fan is less than the set rotating speed, the cycle ratio of the high-level signal in the period of the rotating speed control signal is increased; and if the current rotating speed of the fan is greater than the set rotating speed, the period ratio of the high-level signal in the period of the rotating speed control signal is reduced until the current rotating speed of the fan is equal to the set rotating speed. Of course, if it is detected in step S12 that the current rotation speed of the fan has reached the set rotation speed, it is not necessary to continue to perform step S13.
In a typical embodiment, the bootloader updates the configuration of the fan register in the target direction until the current speed of the fan reaches the set speed after the SoC executes. Of course, the number of updates regarding the fan register configuration may also be a limit value, so that, for example, when the fan is operating in an abnormal state, the configuration regarding the fan register of the bootloader that is performed multiple times sequentially due to the hardware failure of the fan can be avoided.
Referring to fig. 3, a specific embodiment of the SoC for implementing fan control based on bootloader according to the present application is described. It should be noted that, in the following embodiments, the solution of the present application is described in terms of SoC, and in terms of specific hardware design and software configuration, some or all of the functions performed by the following SoC may be implemented by, for example, a CPU in the SoC, or alternatively, a functional module for a specific purpose is integrated in the SoC, and these modified embodiments all fall within the protection scope of the present application.
In this embodiment, the SoC is configured to: executing the configuration of a fan rotating speed register in the bootloader to drive the fan; judging whether the current rotating speed of the fan in the fan rotating speed sampling register reaches a set rotating speed or not; if not, executing the configuration of the bootloader about the fan rotating speed register updated along the target direction; wherein the target is to make the current rotation speed of the fan equal to the set rotation speed.
In order to obtain the current rotating speed of the fan, the SoC determines the current rotating speed of the fan by detecting a rate flag signal output by the fan and according to the cycle ratio of a high-level signal in the period of the rate flag signal, and stores the current rotating speed in a fan rotating speed sampling register. When the SoC executes the configuration of a fan rotating speed register updated by the bootloader along the target direction, if the current rotating speed of the fan is less than the set rotating speed, the period ratio of a high-level signal in the period of the rotating speed control signal is increased; and if the current rotating speed of the fan is greater than the set rotating speed, reducing the cycle ratio of the high-level signal in the period of the rotating speed control signal.
The configuration of the fan speed register comprises: a fan control enable signal configuration to be executed to allow the SoC to generate a fan speed control signal; a signal period configuration for being executed to configure a period of the rotational speed control signal; and the high-level configuration in the period is used for being executed to configure the period ratio of the high-level signal in the period of the rotating speed control signal.
In specific configuration, the register field corresponding to the fan control enabling signal configuration is set up, and the SoC can execute generation of square wave signals; the register field corresponding to the signal period configuration is configured to be 1000, and the period of the square wave signal that the SoC can output is 1000 reference clock periods controlled by the SoC fan, that is, 1000 × (1/1Mhz) ═ 1 ms; the high level in the period is configured to be 500, and the length of the high level in the square wave signal that the SoC can output is 500 reference clock periods for SoC fan control, that is, 500 × 500us (1/1 Mhz).
In the embodiment of the application, the SoC realizes the control function of the fan through the configuration of utilizing the bootloader code, and does not need to use an extra fan controller, so that the hardware cost and the software development cost are reduced, and the SoC can detect whether the current rotating speed of the fan reaches the expectation through sampling, so that the regulation and control of the rotating speed of the fan are realized, the control effect of the SoC fan is optimized, and the stable and reliable work of SoC hardware is ensured.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions.
For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, the functionality of the modules may be implemented in the same one or more software and/or hardware implementations in implementing one or more embodiments of the present description.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of one or more embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, one or more embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, one or more embodiments of the present description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
One or more embodiments of the present description may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. One or more embodiments of the specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A method for realizing SoC fan control under a bootloader is characterized by comprising the following steps:
the SoC executes the configuration of a fan rotating speed register in the bootloader to drive the fan;
the SoC judges whether the current rotating speed of the fan reaches a set rotating speed in a fan rotating speed sampling register; if not, the user can not select the specific application,
the SoC executes the configuration of the bootloader about the fan rotating speed register updated along the target direction; wherein the target is to make the current rotation speed of the fan equal to the set rotation speed.
2. The method of claim 1, wherein the configuring of the fan speed register comprises:
a fan control enable signal configuration to be executed to allow the SoC to generate a fan speed control signal;
a signal period configuration for being executed to configure a period of the rotational speed control signal;
and the high-level configuration in the period is used for being executed to configure the period ratio of the high-level signal in the period of the rotating speed control signal.
3. The method of claim 2, wherein the bootloader updates the configuration of the fan speed register in the target direction, and specifically comprises:
if the current rotating speed of the fan is less than the set rotating speed, the cycle ratio of the high-level signal in the period of the rotating speed control signal is increased; and/or the presence of a gas in the gas,
and if the current rotating speed of the fan is greater than the set rotating speed, reducing the cycle ratio of the high-level signal in the period of the rotating speed control signal.
4. The method for realizing SoC fan control under bootloader according to claim 2,
the fan control enabling signal is configured to be set up by a corresponding register field;
the register field configuration corresponding to the signal period configuration is 1000;
the register field configuration corresponding to the high level configuration in the period is 500.
5. The method for implementing SoC fan control under bootloader of claim 1, further comprising:
the SOC detects a speed mark signal output by the fan, determines the current rotating speed of the fan according to the cycle ratio of a high-level signal in the speed mark signal cycle, and stores the current rotating speed in the fan rotating speed sampling register.
6. An SOC for implementing fan control based on bootloader, the SOC being configured to:
executing the configuration of a fan rotating speed register in the bootloader to drive the fan;
judging whether the current rotating speed of the fan in the fan rotating speed sampling register reaches a set rotating speed or not; if not, the user can not select the specific application,
executing the configuration of the bootloader about the fan rotating speed register updated along the target direction; wherein the target is to make the current rotation speed of the fan equal to the set rotation speed.
7. The bootloader based SOC of claim 6, wherein the configuration of the fan speed register comprises:
a fan control enable signal configuration to be executed to allow the SoC to generate a fan speed control signal;
a signal period configuration for being executed to configure a period of the rotational speed control signal;
and the high-level configuration in the period is used for being executed to configure the period ratio of the high-level signal in the period of the rotating speed control signal.
8. The bootloader-based SOC according to claim 7, wherein the SOC is specifically configured to:
if the current rotating speed of the fan is less than the set rotating speed, the cycle ratio of the high-level signal in the period of the rotating speed control signal is increased; and/or the presence of a gas in the gas,
and if the current rotating speed of the fan is greater than the set rotating speed, reducing the cycle ratio of the high-level signal in the period of the rotating speed control signal.
9. The bootloader based SOC of claim 7, wherein,
the fan control enabling signal is configured to be set up by a corresponding register field;
the register field configuration corresponding to the signal period configuration is 1000;
the register field configuration corresponding to the high level configuration in the period is 500.
10. The SOC of claim 6, wherein the SOC is further configured to detect a rate flag signal output by the fan, determine a current rotation speed of the fan according to a cycle ratio of a high-level signal in a cycle of the rate flag signal, and store the current rotation speed in the fan rotation speed sampling register.
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