CN109656351A - The system for reducing MCU control WiFi stand-by power consumption - Google Patents
The system for reducing MCU control WiFi stand-by power consumption Download PDFInfo
- Publication number
- CN109656351A CN109656351A CN201811570329.6A CN201811570329A CN109656351A CN 109656351 A CN109656351 A CN 109656351A CN 201811570329 A CN201811570329 A CN 201811570329A CN 109656351 A CN109656351 A CN 109656351A
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- China
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- wifi
- mcu
- chip
- wifi chip
- power consumption
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephone Function (AREA)
Abstract
The present invention relates to WiFi technology fields, disclose a kind of system of reduction MCU control WiFi stand-by power consumption, solve MCU cutting WiFi chip power supply and form it into load electric leakage, lead to the higher problem of system power dissipation.The present invention includes MCU and WiFi chip, and MCU and WiFi chip are normal power supply state, and the two is connected using I2C interface mode；When needing to obtain WiFi position data collecting, MCU is waken up WiFi chip by GPIO interface, and is initiated WiFi spy to WiFi chip by I2C and detectd order, is executed to visit and is detectd operation；After completing WiFi positioning, MCU notifies WiFi chip to make it into sleep state by I2C.The present invention is suitable for by low-power consumption MCU being master control, passes through the positioning terminal system of I2C and WiFi communication.
Description
Technical field
The present invention relates to WiFi technology fields, the in particular to system of reduction MCU control WiFi stand-by power consumption.
Background technique
At present using MCU as the positioning system of master control, in terms of the stand-by power consumption of control WiFi, what is generallyd use is to work as WiFi
It has executed after spy detects positioning function, WiFi chip for being electrically cut off, is realized that stand-by power consumption reduces by MCU.The method is actually using
In, after having ignored WiFi chip power-off, MCU and WiFi chip can have potential difference in I2C bus, and WiFi chip is made to form one
A load circuit leaks electricity.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of system of reduction MCU control WiFi stand-by power consumption, solve
MCU cutting WiFi chip power supply forms it into load electric leakage, leads to the higher problem of system power dissipation.
To solve the above problems, the technical solution adopted by the present invention is that: the system for reducing MCU control WiFi stand-by power consumption,
Including MCU and WiFi chip, MCU and WiFi chip are normal power supply state, and the two is connected using I2C interface mode；It is needing
When obtaining WiFi position data collecting, MCU is waken up WiFi chip by GPIO interface, and is initiated by I2C to WiFi chip
Order is detectd in WiFi spy, is executed to visit and is detectd operation；After completing WiFi positioning, MCU notifies WiFi chip to make it into sleep by I2C
State.
Further, in order to reduce power consumption, the sleep state is deep sleep state, and WiFi chip waits under deep sleep state
Electromechanics stream is less than 10uA.
Further, MCU and WiFi chip can cooperate low pressure difference linear voltage regulator to power by battery.
The beneficial effects of the present invention are: the present invention is passed through when needing to obtain WiFi position data collecting by main control MCU
GPIO interface wakes up WiFi chip, and executes spy and detect operation, after completing WiFi positioning, WiFi chip is made to be in deep sleep shape
State keeps low power operation, to avoid simply cutting off WiFi chip power supply and forming it into load leaking electricity, causes system power dissipation inclined
High problem.The present invention can be used for powering with battery, is master control by low-power consumption MCU, passes through the positioning terminal system of I2C and WiFi communication
System.
Detailed description of the invention
Fig. 1 is the functional block diagram of embodiment.
Specific embodiment
The present invention provides a kind of system of reduction MCU control WiFi stand-by power consumption, including MCU and WiFi chip, MCU and
WiFi chip is normal power supply state, and the two is connected using I2C interface mode.When needing to obtain WiFi position data collecting,
MCU is waken up WiFi chip by GPIO interface, and is initiated WiFi spy to WiFi chip by I2C and detectd order, is executed to visit and is detectd behaviour
Make；After completing WiFi positioning, MCU notifies WiFi chip to make it into sleep state by I2C, keeps low power operation.
Below by embodiment, the present invention will be further described.
Embodiment carries out a system design from hardware and software, realizes that stand-by power consumption reduces, promotes cruise duration.It is real
The specific embodiment for applying example is as follows:
A, hardware material type selecting: as shown in block diagram 1, MCU uses low-power consumption scheme (standby current consumption is in uA magnitude),
Support I2C interface, WiFi chip equally uses I2C interface, and (standby current is less than 10uA) under deep sleep, together for band deep sleep function
When have arousal function.
B, hardware circuit is implemented: as shown in block diagram 1, the system of embodiment is by lithium battery power supply, MCU and WiFi chip difference
It is powered using two LDO (low pressure difference linear voltage regulator), and is maintained normal power supply state.I2C interface is used between MCU and WiFi
It is communicated, the GPIO interface control WiFi of MCU wakes up interface；
C, software implementation process:
1, when needing WiFi location information, MCU initiates WiFi spy by I2C and detects order.
2, positioning operation is detectd in execution spy after WiFi chip receives order, obtains the equipment such as surrounding WiFi, hot spot in real time
The location informations such as MAC Address, signal strength, SSID, and MCU is transferred to by I2C by the location information data detectd are visited.
3, MCU, by specific data format, is made after the completion of location information data receiver by I2C notice WiFi chip
It enters deep sleep state, keeps low power operation.
4, when the next spy of execution is detectd, WiFi chip is waken up by MCU control GPIO level change, and as described above
WiFi spy is completed again detects positioning.
Claims (3)
1. the system for reducing MCU control WiFi stand-by power consumption, including MCU and WiFi chip, which is characterized in that MCU and WiFi core
Piece is normal power supply state, and the two is connected using I2C interface mode；When needing to obtain WiFi position data collecting, MCU passes through
GPIO interface wakes up WiFi chip, and initiates WiFi spy to WiFi chip by I2C and detect order, executes to visit and detects operation；Complete
After positioning at WiFi, MCU notifies WiFi chip to make it into sleep state by I2C.
2. reducing the system of MCU control WiFi stand-by power consumption as described in claim 1, which is characterized in that the sleep state
For deep sleep state, WiFi chip standby current is less than 10uA under deep sleep state.
3. reducing the system of MCU control WiFi stand-by power consumption as described in claim 1, which is characterized in that MCU and WiFi chip
Low pressure difference linear voltage regulator is cooperated to power by battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570329.6A CN109656351A (en) | 2018-12-21 | 2018-12-21 | The system for reducing MCU control WiFi stand-by power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570329.6A CN109656351A (en) | 2018-12-21 | 2018-12-21 | The system for reducing MCU control WiFi stand-by power consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109656351A true CN109656351A (en) | 2019-04-19 |
Family
ID=66116229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811570329.6A Pending CN109656351A (en) | 2018-12-21 | 2018-12-21 | The system for reducing MCU control WiFi stand-by power consumption |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103384157A (en) * | 2013-03-14 | 2013-11-06 | 上海汉枫电子科技有限公司 | Low-power-consumption embedded type WIFI module |
| CN104333891A (en) * | 2014-10-30 | 2015-02-04 | 国家电网公司 | Low-power WiFi communication chip based on passive awakening and method thereof |
| CN104469905A (en) * | 2014-11-14 | 2015-03-25 | 惠州Tcl移动通信有限公司 | Method and system for reducing idle power consumption of NFC chip |
| CN205249491U (en) * | 2015-10-13 | 2016-05-18 | 华南农业大学 | Device of transmission WIFI broadcasting frame of low -power consumption |
-
2018
- 2018-12-21 CN CN201811570329.6A patent/CN109656351A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103384157A (en) * | 2013-03-14 | 2013-11-06 | 上海汉枫电子科技有限公司 | Low-power-consumption embedded type WIFI module |
| CN104333891A (en) * | 2014-10-30 | 2015-02-04 | 国家电网公司 | Low-power WiFi communication chip based on passive awakening and method thereof |
| CN104469905A (en) * | 2014-11-14 | 2015-03-25 | 惠州Tcl移动通信有限公司 | Method and system for reducing idle power consumption of NFC chip |
| CN205249491U (en) * | 2015-10-13 | 2016-05-18 | 华南农业大学 | Device of transmission WIFI broadcasting frame of low -power consumption |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 621000 Sichuan Ailian Technology Co.,Ltd., Anzhou Industrial Park, Mianyang City, Sichuan Province Applicant after: Sichuan Ailian Technology Co.,Ltd. Address before: 621000 Mianyang city of Sichuan Province, Sichuan Industrial Park, love science and Technology Co. Applicant before: SICHUAN AI-LINK TECHNOLOGY Co.,Ltd. |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190419 |
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| RJ01 | Rejection of invention patent application after publication |