CN113721751A - Low-power-consumption management method and system based on event and dormancy timer - Google Patents
Low-power-consumption management method and system based on event and dormancy timer Download PDFInfo
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- 238000007726 management method Methods 0.000 title claims abstract description 35
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- 238000000034 method Methods 0.000 claims abstract description 16
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- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
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- 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
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/3287—Power saving characterised by the action undertaken by switching off individual functional units in the computer system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
A low power consumption management method and system based on event and dormancy timer, said method comprises the following steps, establish the system dormancy timer, start said dormancy timer and begin timing; if the trigger event occurs, resetting the count value of the sleep timer and restarting counting; if the keep-alive event occurs, clearing the count value of the sleep timer and stopping counting, and restarting the sleep timer and counting after quitting the keep-alive event; if the count of the dormancy timer reaches a set value, closing the peripheral module and enabling the MCU to enter a low power consumption mode; when the system is in a sleep state, if the peripheral module triggers external interruption, the MCU is awakened to exit from a low power consumption mode, a system clock is reset, the peripheral module is initialized, the system is recovered to an operating state, and the sleep timer is restarted. The system comprises an MCU module and a peripheral module. The method and the system can effectively reduce the power consumption of the system on the premise of not reducing the performance of the system.
Description
Technical Field
The invention relates to the technical field of embedded systems, in particular to a low-power-consumption management method and system based on an event and dormancy timer.
Background
The energy consumption problem of the design of the embedded system is a difficult point and a hot point which are generally concerned in the design process of the embedded system, on one hand, along with the development of the Internet of things, the requirements of the movable embedded equipment on volume and performance are continuously improved, the contradiction between the small volume and high performance of the embedded equipment and the fact that the system power supply can only use a battery with limited energy is increasingly prominent, and the application and the development of the embedded system are severely restricted; on the other hand, for embedded devices operating in the commercial power environment, it is also required to reduce the power consumption of the devices to promote environmental protection and improve the energy utilization rate, and especially for metering and monitoring devices operating in the power grid, the operating power consumption directly affects the metering precision and the power supply loss. The low-power design of the embedded system is an effective means for solving the contradiction, and usually comprises two aspects of hardware low-power design and software low-power design. The aim of low-power management of the system is to reduce the energy consumption of the system as much as possible on the premise of meeting the performance requirements of application programs so as to prolong the standby time of the equipment. For large operating systems such as Android and Linux, a complete system low-power management mechanism is provided, and for a mainstream small real-time operating system (RTOS): some systems do not provide any low power management mechanism; one part of the system supports a tickless function, wherein tickless means that when the system enters an IDLE task, a system tick clock is stopped, part of peripheral equipment is closed, and a CPU enters a sleep mode to reduce the power consumption of the system; besides supporting the tickless function, a part of operating systems can adjust the system operating frequency according to the occupancy rate of the system CPU in the normal operating stage of the system so as to reduce the system power consumption.
For a system without a low-power-consumption management mechanism, the requirement of an embedded device for low power consumption is obviously not met, the performance of the system is affected by a mode of reducing the CPU frequency according to the CPU occupancy rate during the operation of the system, the power consumption cannot be reduced, a tickless mechanism is really useful for reducing the power consumption, but the following defects exist in the mode of using the tickless mode to manage the low power consumption of the system: (1) the system can not obtain the state of the application program processing event and needs to passively wait for the system to enter an IDLE task; (2) when the writing of the application program is defective, and the low power consumption effect is not good due to the fact that the system does not enter the IDLE, positioning analysis is difficult to perform by developers; (3) due to the lack of interaction with the application program in the tkless manner, in some application scenarios, frequent switching between the running mode and the sleep mode of the MCU and frequent initialization and de-initialization of the peripheral device may occur, which may result in increased power consumption (the power consumption for frequently turning on and off the low power consumption process may be more than the power saving amount of many low power consumption modes), and may even affect the normal operation of the system. Therefore, the existing RTOS low power management method has disadvantages, and needs to be improved and enhanced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an RTOS low-power-consumption management method and system which can ensure the normal operation of the system, do not reduce the performance of the system, effectively reduce the power consumption of the system and prolong the standby time of the system.
In order to solve the above technical problem, the present invention provides a low power consumption management method based on an event and dormancy timer, comprising the following steps:
step S1, the system is powered on, a system dormancy timer is established, the dormancy timer is started and timing is started;
step S2, in the process of the sleep timer, if a trigger event occurs, the count value of the sleep timer is cleared and the count is restarted; if the keep-alive event occurs, clearing the count value of the sleep timer and stopping counting, and restarting the sleep timer and counting after quitting the keep-alive event;
step S3, if the count of the dormancy timer reaches a set value, the peripheral module is closed, the MCU enters a low power consumption mode, and the system enters a dormancy state;
and step S4, when the system is in a sleep state, if the peripheral module triggers external interruption, the MCU is awakened to exit the low power consumption mode, the system clock is reset, the peripheral module is initialized, the system is restored to the running state, and the sleep timer is restarted and returns to the step S2.
Further, the sleep timer is a periodic timer.
Further, in the step S2, when a trigger-like or keep-alive-like event occurs, the corresponding event is written into the event control block, and the occurred event is read and processed in a blocking manner.
Further, step S3 includes turning off the peripheral module and enabling the MCU to enter a low power consumption mode if an active sleep request of the application is received, and enabling the system to enter a sleep state.
Further, in step S3, the step of enabling the MCU to enter the low power consumption mode is to operate the peripheral module to initialize and close the MCU I/O clock, so that the MCU enters the low power consumption mode.
The invention also provides a low-power-consumption management system based on the event and the dormancy timer, which comprises an MCU module and a peripheral module, wherein the peripheral module is connected with the MCU module.
Furthermore, the peripheral module comprises a communication module, a first sensor module and a second sensor module, the communication module, the first sensor module and the second sensor module are connected with the MCU module, the first sensor module is used for generating triggering events, and the second sensor module is used for generating keep-alive events.
Furthermore, the communication module is an NB-IOT module, a 4G communication module or a GPRS communication module.
Furthermore, the first sensor module is an infrared induction switch, a door magnetic switch or a photoelectric switch; the second sensor module is a camera module or an AD sampling module or a photoelectric sensor module.
Furthermore, the MCU module adopts STM32F103VET6 type MCU.
The invention also provides a low-power-consumption electronic device which comprises a door magnetic switch, an MCU, a sensor and a voice playing loudspeaker and is characterized in that the MCU has a low-power-consumption mode, and low-power-consumption management is carried out by adopting the low-power-consumption management method based on the event and dormancy timer.
The invention has the beneficial effects that:
the low-power-consumption management method based on the event and the dormancy timer divides the events occurring in the system into two types, wherein one type is transient events which occur temporarily, such as key-press, mouse click and the like, and the transient events are called trigger type events (trigger); the other is a persistent event that needs to be performed for a period of time, such as data acquisition, processing, transmission, etc., and is called a keep-alive event (alive). The counting value and the start-stop state of the sleep timer are influenced by the two events, so that the time for the system to enter the low power consumption mode is controlled. The low-power-consumption mode is regularly entered after the system is IDLE through the dormancy timer, meanwhile, the application program can actively request to enter the low-power-consumption mode without passively waiting for the system to enter an IDLE task, and a management mechanism of active dormancy of the system is provided. Meanwhile, when a trigger event or a keep-alive event occurs, the currently occurring keep-alive event is inquired and the number of times of the occurring trigger event is accumulated in the running process of the system by writing the corresponding event into the event control block and reading the occurring event in a blocking mode and processing the event. The problem that when the state of an application program processing event cannot be obtained in the existing tickless mechanism, a system needs to be passively waited for entering an IDLE task, and when the application program is written with defects, the system does not enter the IDLE task, so that the low power consumption effect is not good, and developers are difficult to perform positioning analysis is solved. Meanwhile, the problem that the normal operation of the system is affected even if the power consumption is increased (the power consumption in the process of frequently turning on and off the low power consumption is more than the electric quantity saved by a plurality of low power consumption modes) due to the fact that the existing tick less mechanism lacks interaction with an application program, the conditions that the MCU is frequently switched between the operation mode and the sleep mode and the peripheral is frequently initialized and de-initialized under certain application scenes are solved.
In a word, the power consumption management method and the system disclosed by the invention can efficiently and conveniently manage the sleeping and awakening states of the system, facilitate the analysis of system operation transactions by developers and effectively reduce the power consumption of the system.
Drawings
FIG. 1 is a flow chart of an embodiment of a low power management method based on event and sleep timers according to the present invention.
FIG. 2 is a block diagram of an embodiment of a low power system based on event and sleep timers in accordance with the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As shown in fig. 1, the present invention provides a device low power consumption management method based on event and dormancy timers, which is characterized by comprising the following steps:
s1, powering on the system, creating a low-power-consumption management thread, creating a software timer as a system dormancy timer by the low-power-consumption management thread, starting the dormancy timer and starting timing;
s2, in the timing process of the sleep timer, when a trigger event occurs, the count value of the sleep timer is cleared and counting is restarted, when a keep-alive event occurs, the sleep timer is stopped and the counting is cleared, and when the keep-alive event exits, the sleep timer is restarted and counted;
s3, the sleep timer counts the sleep time reaching the set sleep time, the peripheral module is closed, the MCU module enters a low power consumption mode, and the system enters a sleep state;
s4, the system is in a sleep state, an external interrupt is triggered by the peripheral module, the MCU module is awakened to exit a low power consumption mode, a system clock is reset, the peripheral module is initialized, the system is recovered to a running state, and the sleep timer is restarted.
As a preferred scheme, in this embodiment, the MCU module supports a low power mode, and can be awakened by a programmed external interrupt source after entering the low power mode.
Preferably, in this embodiment, the dormancy timer created in step S1 is a periodic timer, and the time for the device to automatically hibernate may be set by an application program. Specifically, the period unit of the sleep timer is in seconds.
As a preferable scheme, in this embodiment, in step S2, when a trigger-type or keep-alive-type event occurs in the device, the device writes a corresponding event into the event control block, and the low-power management thread reads and processes the event in a blocking manner, and supports querying the keep-alive event that currently occurs and accumulating the number of times of the trigger event that occurs during the running process. The triggering or keep-alive events can occur randomly.
As a preferable scheme, in this embodiment, in step S3, when the peripheral module is turned off, the MCU module operates the peripheral module to initialize and turn off the I/O port clock, the MCU module enters a low power consumption mode, and the system enters a sleep state.
As shown in fig. 2, the invention further provides a low-power management system based on an event and dormancy timer, which is used for detecting and shooting the intrusion of a power distribution room, uploading pictures to a server and giving an alarm, and the system comprises an MCU module 1, a camera/sensor module 2, an infrared induction/door magnetic switch 3 and an NB-IOT module 4. MCU module 1 has the low-power consumption mode, and camera/sensor module 2 passes through GPIO or I2C or SPI interface connection MCU module 1, and infrared induction door magnetic switch 3 passes through PA0 interface connection MCU module 1, and MCU module 1 is connected through the UART to NB-IOT module 4. When the infrared induction/door magnetic switch 3 acts, a trigger event is generated, the MCU module 1 is awakened and the camera/sensor 2 is initialized, the system is informed of entering a keep-alive event, the MCU module 1 reads data of the camera/sensor module 2, the read data is reported through the NB-IOT module 4, and the system exits the keep-alive event after the data reporting is completed. After the set sleep time is reached, the camera module/sensor 2, the infrared induction/door magnetic switch 3 and the NB-IOT module 4 are suspended, the I/O port clock of the MCU module 1 is forbidden, the MCU module 1 is set to enter a STANDBY mode, and the system state is set to be a sleep state. Before the MCU module 1 enters the low power consumption mode, an I/O port connected with the infrared induction/door magnetic switch 3 is set as an interrupt source capable of being awakened, after the MCU module 1 enters the low power consumption mode, the level change of an I/O port pin of the MCU module 1 is controlled by controlling the infrared induction switch 3, the awakening interrupt is triggered, and the MCU module 1 is awakened. And setting the system clock frequency of the MCU module 1, initializing the camera module 2 and the NB-IOT module 4, and setting the system to be in a running state.
Preferably, in this embodiment, the system voltage is 3.3V.
As a preferable scheme, in this embodiment, the MCU module 1 may adopt an STM32F103VET6 or other MCU with a low power consumption mode; the camera/sensor module 2 can also adopt an AD sampling module and a photoelectric sensor module; the infrared induction/door magnetic switch 3 can also adopt a photoelectric switch; the NB-IOT module 4 may also adopt other communication modules with network data transmission capability, such as a 4G communication module, a GPRS communication module, and the like. In the actual use process, the system RTOS needs to support the functions of threads, software timers and event reading and writing, and the RTOS kernel type is not limited.
The invention further provides low-power-consumption electronic equipment which is used for the intelligent garbage can equipment. The low-power-consumption electronic equipment comprises a door magnetic switch, an MCU (microprogrammed control unit), a sensor and a voice playing loudspeaker, wherein the MCU is in a low-power-consumption mode, and low-power-consumption management is performed by adopting the low-power-consumption management method based on the event and dormancy timer. This low-power consumption electronic equipment awakens up MCU through door magnetic switch, when intelligent garbage bin door was opened (someone lost rubbish), whether fill with through sensor detection garbage bin, in time remind the sanitationman to clear up through pronunciation broadcast loudspeaker, can also broadcast simultaneously and propagate the advertisement.
The embodiment of the invention can carry out sequence adjustment, combination and deletion according to actual needs.
The embodiments describe the present invention in detail, and the specific embodiments are applied to illustrate the principle and the implementation of the present invention, and the above embodiments are only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A low power consumption management method based on event and dormancy timers is characterized by comprising the following steps:
s1, powering on the system, creating a system dormancy timer, starting the dormancy timer and starting timing;
s2, in the process of timing the sleep timer, if a trigger event occurs, the count value of the sleep timer is cleared and the count is restarted; if the keep-alive event occurs, clearing the count value of the sleep timer and stopping counting, and restarting the sleep timer and counting after quitting the keep-alive event;
s3, if the count of the dormancy timer reaches a set value, the peripheral module is closed, the MCU enters a low power consumption mode, and the system enters a dormancy state;
s4, when the system is in the sleep state, if the external module triggers the external interrupt, the MCU is waken to exit the low power consumption mode, the system clock is reset, the initialization of the external module is carried out, the system is recovered to the running state, the sleep timer is restarted, and the step S2 is returned.
2. The method for event and sleep timer based low power management as claimed in claim 1, wherein the sleep timer is a periodic timer.
3. The method for managing low power consumption based on event and dormancy timer according to claim 1, wherein in step S2, when the trigger type or keep-alive type event occurs, writing the corresponding event to the event control block, and reading and processing the occurred event in a blocking manner.
4. The method for managing low power consumption based on event and dormancy timer according to claim 1, wherein the step S3 further comprises turning off the peripheral module and making the MCU enter a low power consumption mode if an application active dormancy request is received, and the system enters a dormant state.
5. The method for managing low power consumption based on event and sleep timer according to claim 1, wherein in the step S3, the step of enabling the MCU to enter the low power consumption mode is to enable the MCU to enter the low power consumption mode by the MCU operating the peripheral module to initialize and turn off the MCU I/O port clock.
6. A low-power management system based on event and dormancy timer, comprising MCU module and peripheral module, the said peripheral module is connected with said MCU module, characterized by, the said MCU module has low-power consumption modes, adopt any one of claim 1-5 the said low-power management method based on event and dormancy timer to carry on the low-power management.
7. The event and dormancy timer-based low power management system of claim 6 wherein the peripheral module comprises a communication module, a first sensor module and a second sensor module, the communication module, the first sensor module and the second sensor module are connected to the MCU module, the first sensor module is used for generating trigger type events, and the second sensor is used for generating keep alive type events.
8. The event and dormancy timer-based low power management system of claim 7 wherein the communication module is an NB-IOT module or a 4G communication module or a GPRS communication module.
9. The event and sleep timer based low power management system of claim 7, wherein the first sensor module is an infrared inductive switch or a door magnetic switch or a photoelectric switch; the second sensor module is a camera module or an AD sampling module or a photoelectric sensor module.
10. A low-power consumption electronic device, comprising a door magnetic switch, an MCU, a sensor and a voice playing loudspeaker, wherein the MCU has a low-power consumption mode, and the low-power consumption management method based on the event and dormancy timer of any one of claims 1-5 is adopted for low-power consumption management.
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| CN114698072B (en) * | 2022-03-21 | 2024-04-26 | 沈阳中科奥维科技股份有限公司 | Low-power-consumption circuit of WIA-PA wireless vibration transmitter and control method |
| CN115543450A (en) * | 2022-09-20 | 2022-12-30 | 国网江苏省电力有限公司信息通信分公司 | Server-free computing dynamic dormancy method for resource optimization in edge scene and application |
| CN115543450B (en) * | 2022-09-20 | 2024-02-23 | 国网江苏省电力有限公司信息通信分公司 | Method for dynamically dormancy of server-free calculation of resource optimization in edge scene and application |
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