CN104469905B - Reduce the method and system of power consumption when NFC chip is left unused - Google Patents
Reduce the method and system of power consumption when NFC chip is left unused Download PDFInfo
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- CN104469905B CN104469905B CN201410644488.1A CN201410644488A CN104469905B CN 104469905 B CN104469905 B CN 104469905B CN 201410644488 A CN201410644488 A CN 201410644488A CN 104469905 B CN104469905 B CN 104469905B
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- 230000009467 reduction Effects 0.000 description 11
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Classifications
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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
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
The invention discloses the method and system for reducing power consumption when NFC chip is left unused, method includes：A, when the duration that I2C buses are in idle condition being more than the first predetermined amount of time, NFC chip is switched to power save mode；B, after baseband processor is to NFC chip transmission data, NFC chip activates and switches and is in working condition；C, baseband processor is again to NFC chip transmission data.The method and system provided by the invention for reducing power consumption when NFC chip is left unused, by making NFC chip enter power save mode when idle, mode into working condition is reactivated by baseband processor control NFC chip, effectively reduces power consumption of NFC chip when idle.Meanwhile the above method need not add additional hardware device or connection based on the connection of common I2C buses, and it is simple and practicable, it is versatile.
Description
Technical field
The present invention relates to mobile terminal Low-power Technology more particularly to a kind of methods reducing power consumption when NFC chip is left unused
And system.
Background technology
I2C buses are a kind of common buses for connecting microcontroller and its peripheral equipment.Because it is with interface line
It is few（A clock line and a data wire are only needed, altogether both threads）, control mode is simple, and device packing forms are small, traffic rate
The advantages that higher, so I2C buses are widely adopted in microelectronics communication control field.And in the terminal, many peripheries
Device is connected by I2C buses with baseband processor, such as NFC more popular currently on the market（Near Field
Communication, near-field communication）Chip.
In the prior art, after user opens NFC function by menu selection, NFC chip is at armed state waiting
Baseband processor is said the word by I2C buses.But in actual use, NFC function is at not in major part
Use state, such as after user's morning opens NFC function, only use at noon NFC function carried out in supermarket it is primary wirelessly
Payment, remaining time are unused NFC function.
Therefore, after user opens NFC function, the time for actually using NFC function is seldom, and NFC chip standby time is very
It is long, increase the ineffective power consumption of mobile terminal.
Invention content
Place in view of above-mentioned deficiencies of the prior art, when idle the purpose of the present invention is to provide a kind of reduction NFC chip
The method and system of power consumption, it is intended to which NFC chip standby time is long in the prior art for solution, increases asking for mobile terminal ineffective power consumption
Topic.
In order to achieve the above object, this invention takes following technical schemes：
A method of power consumption when NFC chip is left unused is reduced, NFC chip is connect by I2C buses with baseband processor,
Include the following steps：
A, when the duration that I2C buses are in idle condition being more than the first predetermined amount of time, NFC chip is switched to section
It can state；
B, after baseband processor is to NFC chip transmission data, NFC chip activates and switches and is in working condition；
C, baseband processor is again to NFC chip transmission data.
When the reduction NFC chip is idle in the method for power consumption, the step A is specifically included：
Whether A1, in running order NFC chip detection I2C buses are in idle condition；
A2, when the duration that I2C buses are in idle condition be more than the first predetermined amount of time when, NFC chip will with when
The GPIO port of clock line connection is configured to interrupt mode and is switched to power save mode.
When the reduction NFC chip is idle in the method for power consumption, the step B is specifically included：
B1, baseband processor are to NFC chip transmission data；
Level change occurs for B2, the GPIO port, generates interrupt signal, activates NFC chip；
B3, the NFC chip being activated are configured the GPIO port to by interrupt mode the clock ray mode of I2C, and
After the second predetermined amount of time, switching is in working condition.
When the reduction NFC chip is idle in the method for power consumption, the power save mode of the NFC chip is specially only to respond
The interrupt signal of GPIO port does not receive the data-signal in I2C buses；The working condition of the NFC chip is specially to receive
Data-signal in I2C buses.
When the reduction NFC chip is idle in the method for power consumption, the step C is specifically included：
C1, whether there is or not the data for receiving baseband processor transmission for baseband processor detection NFC chip；
C2, when NFC do not receive baseband processor transmission data and after third predetermined amount of time, again to NFC
Chip sends the data.
A kind of system reducing power consumption when NFC chip is left unused, baseband processor connects NFC chip by I2C buses, described
Baseband processor includes：
Data transmission blocks are used for NFC chip transmission data, and when NFC does not receive transmission data, send again
Data；
The NFC chip includes：
State handover module, for when the idle state of I2C buses is held time more than the first predetermined amount of time, inciting somebody to action
NFC chip is switched to power save mode；
Detection module, for detecting data transmission blocks to after NFC chip transmission data, state of a control handover module will
NFC chip is switched to working condition；
Data reception module, for when NFC chip is in running order, receiving the data in I2C buses.
When the reduction NFC chip is idle in the system of power consumption, the NFC chip further includes pin configuration module, is used
In when the idle state of I2C buses is held time more than the first predetermined amount of time, the GPIO port being connect with clock line is matched
It is set to interrupt mode.
When the reduction NFC chip is idle in the system of power consumption, the detection module is additionally operable to detect the ends GPIO
Mouth level change when generating interrupt signal, activates NFC chip；
The pin configuration module is additionally operable to, when NFC chip activates, configure the GPIO port to by interrupt mode
The clock ray mode of I2C；
The state handover module is additionally operable to be configured to the clock ray mode of I2C by interrupt mode when the GPIO port
And after the second predetermined amount of time, switching NFC chip is in working condition.
When the reduction NFC chip is idle in the system of power consumption,
The power save mode of the NFC chip is specially the interrupt signal for only responding GPIO port, is not received in I2C buses
Data-signal；The working condition of the NFC chip is specially the data-signal in data reception module reception I2C buses.
When the reduction NFC chip is idle in the system of power consumption, the baseband processor further includes：
Detection module is responded, whether there is or not the data for receiving baseband processor transmission for detecting NFC chip；
The data transmission blocks are additionally operable to detect that NFC chip does not receive baseband processor in response detection module
Data of transmission and after third predetermined amount of time, again to NFC chip transmission data.
Advantageous effect：The method and system provided by the invention for reducing power consumption when NFC chip is left unused, by making when idle
NFC chip enters power save mode, reactivates the mode into working condition by baseband processor control NFC chip, effectively
Reduce power consumption of NFC chip when idle.Meanwhile the above method need not add volume based on the connection of common I2C buses
Outer hardware device or connection, it is simple and practicable, it is versatile.
Description of the drawings
Fig. 1 is the method flow diagram that the method for power consumption when NFC chip is left unused is reduced in specific embodiments of the present invention.
Fig. 2 is the side that the baseband processor of the method for power consumption when NFC chip is left unused is reduced in specific embodiments of the present invention
Method flow chart.
Fig. 3 is that the NFC chip of the method for power consumption when reduction NFC chip is idle in specific embodiments of the present invention is in work
Method flow diagram when state.
Fig. 4 is that the NFC chip of the method for power consumption when NFC chip is left unused is reduced in specific embodiments of the present invention in energy saving
Method flow diagram when state.
Fig. 5 is the structure diagram that the system of power consumption when NFC chip is left unused is reduced in specific embodiments of the present invention.
Fig. 6 is the connection diagram that NFC chip of the present invention is connect with baseband processor by I2C buses.
Specific implementation mode
The present invention provides a kind of method and system reducing power consumption when NFC chip is left unused.To make the purpose of the present invention, technology
Scheme and effect are clearer, clear, and the present invention is described in more detail for the embodiment that develops simultaneously referring to the drawings.It should manage
Solution, described herein specific examples are only used to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, the present invention reduces the specific embodiment of the method for power consumption when NFC chip is left unused, specifically include as follows
Step：
S100, NFC chip are connect by I2C buses with baseband processor.
Whether the duration that S200, detection I2C buses are in idle condition is more than the first predetermined amount of time.When being,
Execute step S300；When no, step S400 is executed.
The first time period can be set according to actual use situation, preferably, the first predetermined amount of time is arranged
It is 10 seconds.According to I2C bus protocol standards, I2C bus frees refer to that data line SDA and clock line SCL is high level.
S300, NFC chip are switched to power save mode.After being switched to power save mode, NFC chip lower power consumption does not receive
Data in I2C buses.
S400, NFC chip keep working condition.
S500, baseband processor, to NFC chip transmission data, the NFC chip in power save mode are swashed by I2C buses
Living, switching is in working condition.
S600, baseband processor are again to NFC chip transmission data.
In the present embodiment, NFC chip has energy saving and work two states.When NFC chip is in running order, NFC
The mode that chip receives the data in I2C buses is the prior art, is repeated no more.
And NFC chip is when in power save mode, as described in step S500, baseband processor is to NFC chip transmission data
When, it will be able to NFC chip is activated, working condition is made it into.Therefore, baseband processor needs above-mentioned data retransmitting one
It is secondary, so that in running order NFC chip is received the data and carries out corresponding feature operation.
Specifically, as shown in fig. 6, the concrete mode that NFC chip is connect with baseband processor is：The clock line of I2C buses
It is connect respectively with the GPIO1 of NFC chip and GPIO2 with data line.Wherein, the ports SCL of baseband processor and NFC chip
The line of GPIO1 mouthfuls of connections is clock line, and the line that the ports SDA of baseband processor and the GPIO2 mouths of NFC chip connect is data
Line.
The step S200 is specifically included：First, whether in running order NFC chip detection I2C buses are in sky
Not busy state.Then, when the duration that I2C buses are in idle condition be more than the first predetermined amount of time when, NFC chip will with when
The ports GPIO1 of clock line connection are configured to interrupt mode and are switched to power save mode.
When NFC chip is in power save mode, the step S300 of NFC chip is activated to specifically include：First, baseband processor
To NFC chip transmission data.Then, level change occurs for the ports GPIO1 of the connection I2C bus clock lines, generates interruption
Signal, to activate NFC chip.Finally, the ports GPIO1 are configured to I2C's by the NFC chip being activated by interrupt mode
Clock ray mode.It completes aforesaid operations and after the second predetermined amount of time, NFC chip switching is in working condition.
Use the principle of above-mentioned active mode for：When baseband processor is to NFC chip transmission data, I2C bus clock lines
On will produce clock signal, the ports GPIO1 being attached thereto can generate rising edge or failing edge accordingly, and then generate and interrupt letter
Number, finally activation is in the NFC chip of power save mode.
Second predetermined amount of time can also be determined and be arranged according to actual conditions, preferably, the second pre- timing
Between section be set as 1 second.
More specifically, the step S600 includes：First, whether there is or not receive Base-Band Processing for baseband processor detection NFC chip
The data that device is sent.Then, when NFC does not receive the data of baseband processor transmission, baseband processor is pre- by third
After section of fixing time, the data are sent to NFC chip again.
As described above, when baseband processor detects that NFC chip has response, when receiving the data of transmission, illustrate NFC chip
It is in running order.When baseband processor detects that NFC chip does not respond to, and receives the data of transmission, illustrate at NFC chip
In the power save mode of low-power consumption.
The third predetermined amount of time can be determined according to time situation.It should be noted that institute according to the present invention
The flow for stating method, to avoid NFC chip that from can not normally switching into working condition, second predetermined amount of time should be shorter than
Third predetermined amount of time.
It is preferred that setting the second predetermined amount of time to 1 second, third predetermined amount of time is set as 2 seconds.
According to I2C bus protocol standards, baseband processor may be used as whether there is or not receive number under type detection NFC chip
According to：Host（It is baseband processor in the present invention, similarly hereinafter）To slave（It is NFC chip in the present invention, similarly hereinafter）Send one
When byte data, host need to generate 9 clock signals, wherein the clock signal of front 8 is for sending this byte data
（One byte is eight）, host draws high data line when the 9th clock signal, if slave receives the number of this byte
According to can then drag down data line, data line remains as height if slave does not receive.Host can pass through the 9th clock as a result,
Whether data are low to judge whether slave receives the data of this byte when signal.
Correspondingly, the power save mode of the NFC chip is the interrupt signal for only responding GPIO port, I2C buses are not received
On data-signal, be in lower power consumption levels.And the working condition of the NFC chip is that can receive in I2C buses
Data-signal is in normal working condition.
It is needed for NFC chip sends one group of data DATA [N] by baseband processor, a utilization drop of the present invention
The system of power consumption realizes the specific embodiment for reducing NFC chip power consumption when low NFC chip is idle.The baseband processor and NFC
Chip is as follows：
As shown in Fig. 2, the execution step of baseband processor is：
S1, setting variable K=1.
S2, baseband processor data transmission blocks pass through I2C bus transmission data DATA [K] to NFC chip.
S3, baseband processor response detection module detection NFC chip whether there is or not reception, if the response inspection of baseband processor
It surveys module and detects that NFC chip has reception, then follow the steps S4；If baseband processor response detection module detects NFC cores
Piece does not receive, and thens follow the steps S5.
S5, K=K+1 is enabled, then proceedes to execute step S3.
Until when K=N, indicate that this group of data have been sent.
S5, delay 2 seconds, then execute step S3.
Wherein, DATA [N] indicates that the data of N number of byte, DATA [1] indicate that first character section, DATA [2] indicate first
Byte, DATA [N] indicate nth byte；N is positive integer.
Correspondingly, the execution step of NFC chip is：
As shown in figure 3, when NFC chip is in working condition：
Whether S10, detection I2C buses are in idle condition, and step is executed if continuous 10 seconds detect I2C bus frees
Rapid S20.
S20, data reception module 210 are stopped, and GPIO1 is configured to interrupt function by pin configuration module.
S30, state handover module make NFC chip enter the power save mode of low-power consumption.
As shown in figure 4, when NFC chip is power save mode：
S40, interrupt whether generate interrupt signal in detection module detection GPIO pin, if so then execute step S50.
S50, state handover module make NFC chip enter state of activation.
GPIO mouthfuls are configured to the clock line of I2C buses by S60, pin configuration module by interrupt function.
S70, delay 1 second.
S80, data reception module are started to work, and NFC chip enters working condition, can receive the transmission of baseband processor
Data.
The specific embodiment provided by the invention for reducing the method for power consumption when NFC chip is left unused, passes through in baseband processor
It detects after NFC chip transmission data, judges whether NFC chip is in power save mode by the way that whether NFC chip has response.Such as
Fruit NFC chip is in power save mode, and baseband processor will retransmit the data after 2 seconds.
In NFC chip, if detect I2C bus-free times if being more than ten seconds automatically into power save mode, and will
GPIO1 is configured to interrupt mode, is activated automatically when detecting the interruption at GPIO1.Using the above method, NFC chip will be
Power save mode in low-power consumption when not using, and can swash automatically when receiving the data that baseband processor sends over
It lives to receive the data of baseband processor repeating transmission, thus greatly reduces power consumption of NFC chip when idle.
Based on above method embodiment, the present invention also provides a kind of systems of reduction NFC chip power consumption when idle, such as scheme
Shown in 5, the system comprises：Baseband processor and NFC chip.
The baseband processor 100 includes：Data transmission blocks 110 are used for NFC chip transmission data, and work as NFC
When not receiving transmission data, transmission data again.
The NFC chip 200 includes：State handover module 210, for when the idle state of I2C buses hold time it is super
When crossing the first predetermined amount of time, NFC chip is switched to power save mode.Detection module 220, for detecting data transmission blocks
To after NFC chip transmission data, NFC chip is switched to working condition by state of a control handover module 210.Data reception module
230, for when NFC chip is in running order, receiving the data in I2C buses.Specifically as described in above-described embodiment.
Specifically, the NFC chip further includes pin configuration module 240, for when the idle state of I2C buses maintains
Between more than the first predetermined amount of time when, configure the GPIO port being connect with clock line to interrupt mode.Specific such as above-mentioned implementation
Described in example.
As shown in figure 5, more specifically, the detection module 220 is additionally operable to, when detecting GPIO port level change, generate
When interrupt signal, NFC chip is activated.The pin configuration module 240 is additionally operable to when NFC chip activates, by the ends GPIO
Mouth is configured to the clock ray mode of I2C by interrupt mode.The state handover module 210 is additionally operable to when the GPIO port is in
Disconnected pattern configurations are the clock ray mode of I2C and after the second predetermined amount of time, and switching NFC chip is in working condition.
The baseband processor 100 further includes：Detection module 120 is responded, whether there is or not receive at base band for detecting NFC chip
Manage the data that device is sent.Data transmission blocks 110 are additionally operable to detect that NFC chip does not receive at base band in response detection module
Manage device send data and after third predetermined amount of time, again to NFC chip transmission data.
Correspondingly, the power save mode of the NFC chip is specially the interrupt signal for only responding GPIO port, I2C is not received
Data-signal in bus；The working condition of the NFC chip is specially that data reception module 230 works, and is received in I2C buses
Data-signal.
In conclusion the method and system provided by the invention for reducing power consumption when NFC chip is left unused, can open in user
NFC function but when unused NFC, makes NFC chip be in low-power consumption mode, reduces the power consumption of NFC chip.It sends out and orders when baseband processor
When enabling to NFC chip, NFC chip is set to be switched to state of activation automatically.It is effective to drop while not influencing NFC function use
Power consumption of low NFC chip when idle.Moreover, the above method based on the connection of common I2C buses, need not add additional
Hardware device or connection, it is simple and practicable, it is versatile.
It, can according to the technique and scheme of the present invention and this hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Protect range.
Claims (6)
1. a kind of method reducing power consumption when NFC chip is left unused, NFC chip is connect by I2C buses with baseband processor, special
Sign is, includes the following steps：
A, when the duration that I2C buses are in idle condition being more than the first predetermined amount of time, NFC chip is switched to energy saving shape
State；
B, after baseband processor is to NFC chip transmission data, NFC chip activates and switches and is in working condition；
C, baseband processor is again to NFC chip transmission data；
Wherein, the step A is specifically included：
Whether A1, in running order NFC chip detection I2C buses are in idle condition；
A2, when the duration that I2C buses are in idle condition be more than the first predetermined amount of time when, NFC chip will be with clock line
The GPIO port of connection is configured to interrupt mode and is switched to power save mode；
The step B is specifically included：
B1, baseband processor are to NFC chip transmission data；
Level change occurs for B2, the GPIO port, generates interrupt signal, activates NFC chip；
B3, the NFC chip being activated are configured the GPIO port to by interrupt mode the clock ray mode of I2C, and are being passed through
After second predetermined amount of time, switching is in working condition.
2. the method according to claim 1 for reducing power consumption when NFC chip is left unused, which is characterized in that the NFC chip
Power save mode is specially the interrupt signal for only responding GPIO port, does not receive the data-signal in I2C buses；The NFC chip
Working condition be specially receive I2C buses on data-signal.
3. the method according to claim 1 for reducing power consumption when NFC chip is left unused, which is characterized in that the step C is specific
Including：
C1, whether there is or not the data for receiving baseband processor transmission for baseband processor detection NFC chip；
C2, when NFC do not receive baseband processor transmission data and after third predetermined amount of time, again to NFC chip
Send the data.
4. a kind of system reducing power consumption when NFC chip is left unused, baseband processor pass through I2C buses and connect NFC chip, feature
It is, the baseband processor includes：
Data transmission blocks are used for NFC chip transmission data, and when NFC does not receive transmission data, send number again
According to；
The NFC chip includes：
State handover module, for when the idle state of I2C buses is held time more than the first predetermined amount of time, by NFC cores
Piece is switched to power save mode；
Detection module, for detecting data transmission blocks to after NFC chip transmission data, state of a control handover module is by NFC
Chip is switched to working condition；
Data reception module, for when NFC chip is in running order, receiving the data in I2C buses；
The NFC chip further includes pin configuration module, is made a reservation for more than first for holding time when the idle state of I2C buses
When the period, it configures the GPIO port being connect with clock line to interrupt mode；
The detection module is additionally operable to, when detecting GPIO port level change, when generating interrupt signal, activate NFC chip；
The pin configuration module is additionally operable to, when NFC chip activates, configure the GPIO port to I2C by interrupt mode
Clock ray mode；
The state handover module is additionally operable to be configured to the clock ray mode of I2C when the GPIO port by interrupt mode and passed through
After crossing the second predetermined amount of time, switching NFC chip is in working condition.
5. the system according to claim 4 for reducing power consumption when NFC chip is left unused, which is characterized in that
The power save mode of the NFC chip is specially the interrupt signal for only responding GPIO port, does not receive the data in I2C buses
Signal；The working condition of the NFC chip is specially the data-signal in data reception module reception I2C buses.
6. the system according to claim 4 for reducing power consumption when NFC chip is left unused, which is characterized in that the Base-Band Processing
Device further includes：
Detection module is responded, whether there is or not the data for receiving baseband processor transmission for detecting NFC chip；
The data transmission blocks are additionally operable to detect that NFC chip does not receive baseband processor and sends in response detection module
Data and after third predetermined amount of time, again to NFC chip transmission data.
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| EP3214768B1 (en) * | 2016-03-03 | 2019-08-28 | Nxp B.V. | Nfc power management device and method |
| CN105786674B (en) * | 2016-03-24 | 2018-11-16 | 华为技术有限公司 | A kind of dispatching method and electronic equipment |
| CN106102139A (en) * | 2016-05-26 | 2016-11-09 | 宁波大学 | A kind of method for realizing low power consumption of NFC pre-payment instrument |
| CN106598199A (en) * | 2016-11-30 | 2017-04-26 | 惠州Tcl移动通信有限公司 | Mobile terminal, and power-saving control method and system for proximity sensor of mobile terminal |
| CN107105390A (en) * | 2017-04-12 | 2017-08-29 | 惠州Tcl移动通信有限公司 | A kind of NFC chip control method and system based on mobile terminal |
| CN109656351A (en) * | 2018-12-21 | 2019-04-19 | 四川爱联科技有限公司 | The system for reducing MCU control WiFi stand-by power consumption |
| CN110989822A (en) * | 2019-11-27 | 2020-04-10 | Tcl移动通信科技（宁波）有限公司 | Sensor control method, sensor control device, storage medium and electronic equipment |
| CN112434773A (en) * | 2020-10-29 | 2021-03-02 | 北京中电华大电子设计有限责任公司 | Design method of multi-interface chip low power consumption mode |
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| CN102572119A (en) * | 2011-10-31 | 2012-07-11 | 中兴通讯股份有限公司 | Mobile terminal and power-saving method thereof |
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