CN107340847B - Low-power-consumption program control method for handheld fresh air controller - Google Patents
Low-power-consumption program control method for handheld fresh air controller Download PDFInfo
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- CN107340847B CN107340847B CN201710438610.3A CN201710438610A CN107340847B CN 107340847 B CN107340847 B CN 107340847B CN 201710438610 A CN201710438610 A CN 201710438610A CN 107340847 B CN107340847 B CN 107340847B
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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
- G06F1/3206—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
- G06F1/325—Power saving in peripheral device
- G06F1/3265—Power saving in display device
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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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- 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
- G06F1/3296—Power saving characterised by the action undertaken by lowering the supply or operating voltage
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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
- G06F1/24—Resetting means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0751—Error or fault detection not based on redundancy
- G06F11/0754—Error or fault detection not based on redundancy by exceeding limits
- G06F11/0757—Error or fault detection not based on redundancy by exceeding limits by exceeding a time limit, i.e. time-out, e.g. watchdogs
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Abstract
The invention discloses a low-power-consumption program control method for a handheld fresh air controller, which comprises the following steps of: after the MCU is initialized, the MCU reads and judges the startup zone bit of the flash, if the startup zone bit is in a shutdown state, the system enters a shutdown/startup program, then the system resets and returns to the initialization, if the MCU judges that the startup zone bit is in a startup state, the external interrupt enable is shut off, the watchdog is opened, and the normal operation monitoring or control function is carried out; the MCU checks whether the shutdown button is pressed, if the MCU judges that the shutdown button is not pressed, the MCU enters a standby program, and if the MCU judges that the time reaches a preset value and the automatic standby is needed, the MCU enters the standby program. The low-power-consumption program control method of the handheld fresh air controller can meet the requirement that the electric quantity loss can be minimum when the fresh air controller is in standby and shutdown, so that the fresh air controller keeps smooth operation in the operation process, and the effect of saving electricity is achieved.
Description
Technical Field
The invention relates to a low-power-consumption program control method for a handheld fresh air controller, and belongs to the technical field of fresh air systems.
Background
With the improvement of living standard of people, the air quality of people's life is worse and worse, and the use of the fresh air purifier becomes more and more common. The fresh air controller is a multifunctional home intelligent air quality and environment monitoring control product, can effectively monitor the real-time change conditions of indoor air quality and temperature and humidity in real time, and can regulate the indoor air quality and the environment temperature and humidity by an intelligent control fresh air system to keep the indoor air quality and the environment in the best state all the time. The fresh air controller plays an indispensable role as a control device of the fresh air controller. The existing handheld fresh air controller needs to be charged frequently due to large power consumption in function. According to a conventional charging mode, a battery charging IC needs to supply power to equipment while charging, so that the power consumption of the charging IC is increased, the heating is serious, the current for charging the battery is reduced due to the shunting of two paths, and the charging time of the battery is greatly prolonged; the other path of current for supplying power to the equipment can not meet the requirement of normal work of the equipment, and the electric quantity loss of the conventional handheld fresh air controller can not be lowest during standby and shutdown due to the limitation of the size and the function.
Therefore, the research on a low-power program control method for a handheld fresh air controller becomes a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a low-power-consumption program control method for a handheld fresh air controller.
The purpose of the invention is realized by the following technical scheme: the hand-held fresh air controller comprises an MCU (microprogrammed control Unit) for reading data in a flash mode, an LCD (liquid crystal display) backlight power supply, an LCD power supply, a wireless radio frequency module, an air quality sensor, a CO (carbon monoxide)2The MCU, the LCD backlight power supply, the LCD power supply, the wireless radio frequency module, the air quality sensor and the CO2The sensor, the 5V power supply, the keypad and the backlight power supply are electrically connected, and the low-power program control method comprises the following steps of
S1: after the MCU is initialized, the MCU reads and judges the startup zone bit of the flash, if the startup zone bit is in a shutdown state, the system enters a shutdown/startup program, then the system resets and returns to the initialization, if the MCU judges that the startup zone bit is in a startup state, the external interrupt enable is shut off, the watchdog is opened, the normal operation monitoring or control function is carried out, and then the MCU is stopped from sleeping and returns to a normal working state;
s2: the MCU checks whether a shutdown button is pressed, if the MCU judges that a shutdown key is pressed, the MCU enters a shutdown program, if the MCU judges that the shutdown key is not pressed, the MCU enters a standby program, and if the MCU judges that the time reaches a preset value, the MCU needs to automatically standby, and if the time reaches the preset value, the MCU enters the standby program; and if the program is still in the standby state and no key is triggered, continuing to standby.
Preferably, in step S1, the power-off/on program includes the following steps
S11: the method comprises the steps that a wireless radio frequency module sends shutdown state information of a controller local machine to a controller external device, the accessed external device can conveniently know that a fresh air controller is in a shutdown state at present, then a 5V power supply is turned off, an MCU sends a sleep instruction to a WIFI module, the WIFI module enters the sleep state, an LCD backlight power supply and the LCD power supply are turned off, a key board backlight power supply is turned off, external interruption enables to be turned on, the MCU enters the sleep state, the external interruption is waken up, and once a startup key is pressed, the external interruption is immediately triggered to wake up the MCU;
s12: and after the MCU is awakened, immediately closing the external interrupt, scanning the time of pressing the start key, judging whether the time of pressing the start key reaches a preset value, if the time of pressing the start key does not reach the preset value, enabling the external interrupt to be opened, and entering the dormancy again, if the time of pressing the start key reaches the preset value, opening a system clock, recovering the functions of the functional modules, and setting the start flag bit of the MCU for dormancy awakening to be in a start state.
Preferably, in the step S11, the 5V power supply is turned off to turn off the air quality sensor and the CO2A power supply for the sensor or the wireless radio frequency module.
Preferably, the air quality sensor is used for monitoring the PM 2.5 particulate matter concentration in the air.
Preferably, the radio frequency module is a 433MHz radio frequency module.
The technical scheme of the invention has the advantages that: the low-power-consumption program control method of the handheld fresh air controller can meet the requirement that the electric quantity loss can be minimum when the fresh air controller is in standby and shutdown, so that the fresh air controller keeps smooth operation in the operation process, and the effect of saving electricity is achieved.
Drawings
FIG. 1 is a power supply circuit diagram of the low power consumption of the hand-held fresh air controller of the present invention.
FIG. 2 is a flowchart of the low power consumption process of the handheld fresh air controller of the present invention.
FIG. 3 is a flow chart of a low power consumption power on/off procedure of the handheld fresh air controller according to the present invention.
Detailed Description
Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. The embodiments are merely exemplary for applying the technical solutions of the present invention, and any technical solution formed by replacing or converting the equivalent thereof falls within the scope of the present invention claimed.
The invention discloses a low-power-consumption program control method of a handheld fresh air controller, wherein the handheld fresh air controller comprises an MCU (microprogrammed control Unit) for reading data in a flash mode, an LCD (liquid crystal display) backlight power supply, an LCD power supply, a wireless radio frequency module, an air quality sensor, a CO (carbon monoxide)2The air quality sensor is used for monitoring the concentration of PM 2.5 particles in the air, and the wireless radio frequency module is a 433MHz wireless radio frequency module. The MCU, the LCD backlight power supply, the LCD power supply, the wireless radio frequency module, the air quality sensor and the CO2The sensor, the 5V power supply, the key board and the backlight power supply are electrically connected.
This hand-held type new trend controller low-power consumption supply circuit picture, as shown in fig. 1, this supply circuit includes total supply circuit, LDO boost circuit, first LDO step-down circuit and second LDO step-down circuit, total supply circuit respectively with LDO boost circuit, first LDO step-down circuit and second LDO step-down circuit electricity are connected, because total supply circuit adopts these two kinds of modes of 5V power adapter and lithium cell power supply, so 2.7V ~ 5V's change can appear in its voltage.
The LDO booster circuit is electrically connected with an air quality sensor, a CO2 sensor and a wireless radio frequency communication circuit, and the working voltage of the air quality sensor, the CO2 sensor and the wireless radio frequency communication circuit is 5V, so that the LDO booster circuit is required to boost the low voltage to 5V. First LDO step-down circuit electricity is connected with MCU, touch button circuit, temperature and humidity sensor circuit and WIFI module drive circuit, because MCU, touch button circuit, temperature and humidity sensor circuit and WIFI module drive circuit operating voltage are 3.3V, so need be with voltage drop to 3.3V.
The second LDO step-down circuit is electrically connected with a liquid crystal power supply control circuit and a liquid crystal backlight control circuit, and the liquid crystal power supply control circuit and the liquid crystal backlight control circuit are electrically connected with a liquid crystal driving circuit. Since the operating voltage of the liquid crystal driving circuit is 3.3V, the voltage is required to be reduced to 3.3V. In the using process, the standby is needed, the liquid crystal is darkened at the time, but if the power supply of the liquid crystal driving circuit is completely cut off, the liquid crystal needs to be initialized again when being restarted, and unnecessary time delay is caused during awakening, so that a liquid crystal backlight control circuit is added.
In order to ensure the smooth operation of the whole system, the MCU is added with a watchdog program. When the MCU enters a shutdown program, the MCU enters a dormant state, the system clock is closed at the moment, and the whole MCU keeps extremely low power consumption. However, since the watchdog runs independently, as long as the watchdog is already turned on, the watchdog cannot be turned off unless the whole system is restarted, which is in contradiction with the low power consumption of the MCU, because the watchdog is interrupted and reset by the watchdog, the feeding program cannot be executed as long as the MCU enters the sleep mode. Therefore, in the technical scheme, the function of 'system software reset' is added. And determining whether the main program is started or shut down after the system is reset by using the flag bit of the startup and shutdown stored in the flash.
As shown in fig. 2, the low-power program control method of the handheld fresh air controller includes the following steps:
s1: after the MCU is initialized, the MCU reads the startup zone bit of the flash and judges, if the startup zone bit is in a shutdown state, the system enters a shutdown/startup program, then the system resets and returns to the initialization, if the MCU judges that the startup zone bit is in a startup state, the external interrupt enable is turned off, the watchdog is opened to perform normal operation monitoring or control functions, at the moment, the MCU finishes dormancy, and restores to a normal working state, and all functions are not influenced by low power consumption; "off/on procedure" description: after entering a shutdown program, a series of power supplies of an external circuit are disconnected, and before the MCU enters a dormant state, the MCU opens an on/off key for external interruption, so that the MCU is convenient to wake up. After entering the starting program, the external interruption of the 'starting/closing key' is closed, and the key effective value is obtained by timing scanning, so that the 'standby function' is conveniently called.
S2: the MCU checks whether a shutdown button is pressed, if the MCU judges that a shutdown key is pressed, the MCU enters a shutdown program, if the MCU judges that the shutdown key is not pressed, the MCU enters a standby program, and if the MCU judges that the time reaches a preset value, the MCU needs to automatically standby, and if the time reaches the preset value, the MCU enters the standby program; and if the program is still in the standby state and no key is triggered, continuing to standby. "Standby procedure" states: entering a standby program in two ways, wherein one way is that any key is not detected to be pressed within a timing time; the other is that the "on/off key" is pressed briefly. After entering the standby program, the system turns off a series of power supplies of the LCD backlight, the key LED backlight and the external circuit. The MCU does not enter a dormant state, so that the power supply of an external circuit can be turned on at regular time to acquire sensor data or control equipment; therefore, the effect of saving electricity can still be achieved under the condition of not damaging the normal function.
As shown in fig. 3, the low-power consumption start-up/shut-down procedure of the handheld fresh air controller includes the following steps:
s11: the wireless radio frequency module sends the shutdown state information of the controller local machine to the controller external equipment, the external equipment which is conveniently accessed knows that the fresh air controller is in the shutdown state at present, and then the 5V power supply is turned off, namely the air quality sensor and the CO are turned off2A sensor and a wireless radio frequency module. MCU sends dormancy instruction to WIFI module, and WIFI module enters dormancy state, closes LCD backThe method comprises the following steps that a photoelectric power supply and an LCD power supply are turned off, a key board is turned off, a backlight power supply is turned on, an MCU enters a dormant state, external interruption is waken up, and once a start key is pressed, the external interruption is immediately triggered to waken up the MCU;
s12: and after the MCU is awakened, immediately closing the external interrupt, scanning the time of pressing the start key, judging whether the time of pressing the start key reaches a preset value, if the time of pressing the start key does not reach the preset value, enabling the external interrupt to be opened, and entering the dormancy again, if the time of pressing the start key reaches the preset value, opening a system clock, recovering the functions of the functional modules, and setting the start flag bit of the MCU for dormancy awakening to be in a start state.
The technical scheme of the invention is explained in detail above, and trial shows that the technical scheme of the invention not only ensures that the handheld fresh air controller keeps smooth in the operation process, but also can ensure that the electric quantity loss of the fresh air controller is minimum when the fresh air controller is in standby and shutdown, thereby achieving good power saving effect.
Claims (5)
1. The hand-held fresh air controller comprises an MCU (microprogrammed control Unit) for reading data in a flash mode, an LCD (liquid crystal display) backlight power supply, an LCD power supply, a wireless radio frequency module, an air quality sensor, a CO (carbon monoxide)2The MCU, the LCD backlight power supply, the LCD power supply, the wireless radio frequency module, the air quality sensor and the CO2Sensor, 5V power, keypad and backlight, its characterized in that: the low-power program control method comprises the steps of
S1: after the MCU is initialized, the MCU reads and judges the startup zone bit of the flash, if the startup zone bit is in a shutdown state, the system enters a shutdown/startup program, then the system resets and returns to the initialization, if the MCU judges that the startup zone bit is in a startup state, the external interrupt enable is shut off, the watchdog is opened, the normal operation monitoring or control function is carried out, and then the MCU is stopped from sleeping and returns to a normal working state;
s2: the MCU checks whether the power-off key is pressed down, if the MCU judges that the power-off key is pressed down, the MCU enters a power-off program, if the MCU judges that the power-off key is not pressed down, the MCU enters a standby program, if the MCU judges that the time reaches a preset value, the MCU needs to automatically standby, and if the time reaches the preset value, the MCU enters the standby program; and if the program is still in the standby state and no key is triggered, continuing to standby.
2. The low-power program control method for the handheld fresh air controller according to claim 1, characterized in that: in step S1, the power-off/on program includes the following steps
S11: the method comprises the steps that a wireless radio frequency module sends shutdown state information of a controller local machine to a controller external device, the accessed external device can conveniently know that a fresh air controller is in a shutdown state at present, then a 5V power supply is turned off, an MCU sends a sleep instruction to a WIFI module, the WIFI module enters the sleep state, an LCD backlight power supply and the LCD power supply are turned off, a key board backlight power supply is turned off, external interruption enables to be turned on, the MCU enters the sleep state, the external interruption is waken up, and once a startup key is pressed, the external interruption is immediately triggered to wake up the MCU;
s12: and after the MCU is awakened, immediately closing the external interrupt, scanning the time of pressing the start key, judging whether the time of pressing the start key reaches a preset value, if the time of pressing the start key does not reach the preset value, enabling the external interrupt to be opened, and entering the dormancy again, if the time of pressing the start key reaches the preset value, opening a system clock, recovering the functions of the functional modules, and setting the start flag bit of the MCU for dormancy awakening to be in a start state.
3. The low-power program control method of the handheld fresh air controller according to claim 2, characterized in that: in the step S11, the 5V power supply is turned off to turn off the air quality sensor and the CO2A power supply for the sensor or the wireless radio frequency module.
4. The low-power program control method for the handheld fresh air controller according to claim 1, characterized in that: the air quality sensor is used for monitoring the PM 2.5 particulate matter concentration in the air.
5. The low-power program control method for the handheld fresh air controller according to claim 1, characterized in that: the wireless radio frequency module is a 433MHz wireless radio frequency module.
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| CN109739342B (en) * | 2018-12-25 | 2022-04-26 | 华勤技术股份有限公司 | Electronic equipment |
| CN109832677A (en) * | 2019-03-26 | 2019-06-04 | 深圳市合元科技有限公司 | The control method and electronic cigarette of electronic cigarette |
| CN113517061A (en) * | 2021-07-07 | 2021-10-19 | 广州医软智能科技有限公司 | Sleep mode control method and electronic equipment |
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