CN108259044A - Touch key scanning method and device, computer readable storage medium - Google Patents
Touch key scanning method and device, computer readable storage medium Download PDFInfo
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- CN108259044A CN108259044A CN201810162623.7A CN201810162623A CN108259044A CN 108259044 A CN108259044 A CN 108259044A CN 201810162623 A CN201810162623 A CN 201810162623A CN 108259044 A CN108259044 A CN 108259044A
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- touch key
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- switching circuit
- charging duration
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
- H03M11/20—Dynamic coding, i.e. by key scanning
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
- H03K17/9622—Capacitive touch switches using a plurality of detectors, e.g. keyboard
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0036—Means reducing energy consumption
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Abstract
A kind of touch key scanning method and device, computer readable storage medium, the method includes：Low power consumpting state is currently at detecting, and when current time is in low power consumpting state corresponding wake-up period, the corresponding switching circuit of all touch key-press is controlled to be closed；The first charging duration of reference capacitance is acquired, and trigger event is judged whether according to the described first charging duration, the summation of the first charging duration inductance capacitance corresponding to all touch key-press is related；Touch key-press, switching circuit and inductance capacitance correspond.Said program can reduce the scanning duration of touch key-press under sleep pattern, reduce touch key-press control chip power-consumption.
Description
Technical field
The present invention relates to touch key-press control field more particularly to a kind of touch key scanning methods and device, computer
Readable storage medium storing program for executing.
Background technology
At present, common touch key-press is mostly based on whether capacitive sensing method has touch operation triggering, capacitance to sense
Touch of the basic principle of inducing method based on finger can change the capacitance of inductance capacitance Cp.In the prior art, capacitive sensing
Method generally uses charge migration method.For charge migration method, there are a reference capacitance Cx, by measuring Cp to Cx's
The variation in charging time detects the variable quantity of the capacitance on capacitance Cp, and then judges whether to generate key-press event namely judge
Whether button is triggered.
It is existing that button is generally carried out using channel polling method using the touch key-press control chip of charge migration method
Scanning judges whether to generate trigger event.Channel polling method refers in the same time, only control one touch channel open into
Row key scan, it is only in running order there are one comparator, it is worked at the same time without multiple comparators.
In practical applications, there are two kinds of operating modes for touch key-press control chip：Sleep pattern and operating mode.It is existing
In technology, in a sleep mode, whether when being triggered using channel polling method detection touch key-press, sweep time is longer, work(
Consumption is higher.
Invention content
What the embodiment of the present invention solved is how to reduce the scanning duration of touch key-press under sleep pattern, reduces touch key-press
Control chip power-consumption.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of touch key scanning method, including：It is detecting
It is currently at low power consumpting state, and when current time is in low power consumpting state corresponding wake-up period, controls all touch key-press
Corresponding switching circuit is closed；The first charging duration of reference capacitance is acquired, and is according to the described first charging duration judgement
It is no there are trigger event, the summation of the first charging duration inductance capacitance corresponding to all touch key-press is related；Touch is pressed
Key, switching circuit and inductance capacitance correspond.
Optionally, it is described that trigger event is judged whether according to the described first charging duration, including：It will default first base
Line duration subtracts each other with the described first charging duration, and obtained difference and preset first threshold are compared；It is obtained when described
Difference be more than the first threshold when, judgement there are trigger events；When the obtained difference is not more than the first threshold
When, there is no trigger events for judgement；It is a length of during first baseline：There is no during trigger event, all touch key-press pair
The inductance capacitance answered charges to duration needed for preset voltage value to the reference capacitance.
Optionally, the touch key scanning method further includes：When trigger event is not present in judgement, described first is filled
Electric duration is set as the corresponding first baseline duration of next wake-up period.
Optionally, it after judgement is there are trigger event, further includes：Control the corresponding switch electricity of all touch key-press
Lu Juncong closed states switch to off-state；The corresponding switching circuit of all touch key-press is controlled to be closed successively successively；
When one of switching circuit in the closure state, remaining switching circuit is in off-state；According to each switch
The second charging duration of the corresponding reference capacitance, determines the touch key-press there are trigger event during closing of circuit.
Optionally, the second charging duration of corresponding reference capacitance when being closed according to each switching circuit,
Determine the touch key-press there are trigger event, including：The corresponding switching circuit i of i-th of touch key-press is controlled to be closed, other touches
The corresponding switching circuit of button disconnects；Obtain the second charging duration Ti of the reference capacitance when switching circuit i is closed；
According to the described second charging duration Ti and preset second baseline duration, determine whether i-th of touch key-press is triggered；i
For positive integer and sum that i≤N, N are the touch key-press；It is a length of during second baseline：It is described there is no during trigger event
The corresponding inductance capacitance of i-th of touch key-press charges to duration needed for preset voltage value to the reference capacitance.
Optionally, it is described according to the described second charging duration Ti and preset second baseline duration, it determines to touch for described i-th
Touch whether button is triggered, including：The second baseline duration and the described second charging duration Ti are subtracted each other, the difference that will be obtained
It is compared with preset second threshold；When the obtained difference is more than the second threshold, judgement i-th of touch
Button is triggered；When the obtained difference is not more than the second threshold, judge that i-th of touch key-press is not touched
Hair.
Optionally, it is described to subtract each other the second baseline duration and the described second charging duration Ti, including：To described second
Charging duration Ti is filtered, and the second baseline duration and the filtered second charging duration Ti are subtracted each other, and will
To difference be compared with the second threshold.
Optionally, using following any filtering mode, the described second charging duration Ti is filtered：Average value
Filtering, medium filtering.
Optionally, the touch key scanning method further includes：Determining that i-th of touch key-press be not triggered it
Afterwards, the described second charging duration Ti is set as the corresponding second baseline duration of next wake-up period.
Optionally, the touch key scanning method further includes：After judgement is there are trigger event, by current state from
Low power consumpting state switching is in working condition.
Optionally, it will currently after low power consumpting state switching is in working condition, further include：When detecting the touch
When the duration that button is not triggered reaches preset duration, low power consumpting state is switched to from working condition.
The embodiment of the present invention additionally provides a kind of touch key-press scanning means, including：Control unit, for detect work as
It is preceding in low power consumpting state, and when current time is in low power consumpting state corresponding wake-up period, control all touch key-press pair
The switching circuit answered is closed；Collecting unit, for acquiring the first of reference capacitance the charging duration；Judging unit, for basis
The first charging duration judges whether trigger event, the first charging duration sensing corresponding with all touch key-press
The summation of capacitance is related；Touch key-press, switching circuit and inductance capacitance correspond.
Optionally, the judging unit, will for preset first baseline duration and the described first charging duration to be subtracted each other
Obtained difference is compared with preset first threshold；When the obtained difference is more than the first threshold, judgement is deposited
In trigger event；When the obtained difference is not more than the first threshold, there is no trigger events for judgement；First base
It is a length of during line：There is no during trigger event, the corresponding inductance capacitance of all touch key-press is charged to the reference capacitance
Duration needed for preset voltage value.
Optionally, the touch key-press scanning means further includes：First setting unit, for working as the judging unit judgement
There is no during trigger event, the described first charging duration is set as the corresponding first baseline duration of next wake-up period.
Optionally, the touch key-press scanning means further includes：Touch key-press determination unit, in the judging unit
After judgement is there are trigger event, the corresponding switching circuit of all touch key-press is controlled to switch to disconnection from closed state
State；The corresponding switching circuit of all touch key-press is controlled to be closed successively successively；It is closed when one of switching circuit is in
During conjunction state, remaining switching circuit is in off-state；Corresponding benchmark when being closed according to each switching circuit
Second charging duration of capacitance, determines the touch key-press there are trigger event.
Optionally, the touch key-press determination unit, for the corresponding switching circuit i of i-th of touch key-press to be controlled to be closed,
The corresponding switching circuit of other touch key-press disconnects；Obtain the reference capacitance when switching circuit i is closed second is filled
Electric duration Ti；According to the described second charging duration Ti and preset second baseline duration, whether i-th of touch key-press is determined
It is triggered；The sum that i is positive integer and i≤N, N are the touch key-press；It is a length of during second baseline：There is no triggering things
During part, the corresponding inductance capacitance of i-th of touch key-press charges to duration needed for preset voltage value to the reference capacitance.
Optionally, the touch key-press determination unit, for being filtered to the described second charging duration Ti, by institute
The second baseline duration is stated with the filtered second charging duration Ti to subtract each other, and obtained difference and the second threshold are compared
Compared with.
Optionally, the touch key-press determination unit, for being filtered to the described second charging duration Ti, by institute
It states the second baseline duration with the filtered second charging duration Ti to subtract each other, obtained difference and preset second threshold is compared
Compared with；When the obtained difference is more than the second threshold, judge that i-th of touch key-press is triggered.
Optionally, using following any filtering mode, the described second charging duration Ti is filtered：Average value
Filtering, medium filtering.
Optionally, the touch key-press scanning means further includes：Second setting unit, for determining to touch for described i-th
It touches after button is not triggered, when the described second charging duration Ti is set as next wake-up period corresponding second baseline
It is long.
Optionally, the touch key-press scanning means further includes：Status toggle unit, for there are trigger events in judgement
Later, current state is in working condition from low power consumpting state switching.
Optionally, the status toggle unit is additionally operable to detect that the duration that the touch key-press is not triggered reaches
During preset duration, low power consumpting state is switched to from working condition.
The embodiment of the present invention additionally provides a kind of computer readable storage medium, is stored thereon with computer instruction, described
The step of computer instruction performs the touch key scanning method described in any of the above-described kind when running.
The embodiment of the present invention additionally provides a kind of touch key-press scanning means, including memory and processor, the storage
Computer instruction is stored on device, the computer instruction performs the touch key scanning method described in any of the above-described kind when running
The step of.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantages that：
When the corresponding wake-up period of low power consumpting state is at current time, the corresponding switch electricity of all touch key-press is controlled
Road is closed, at this point, the corresponding inductance capacitance of all touch key-press can be equivalent into a bulky capacitor.By electric on the basis of bulky capacitor
Capacity charge judges whether trigger event, without each touch of poll according to the first of reference capacitance the charging duration
Whether button is triggered, therefore can effectively reduce scanning duration, and then reduces power consumption.
Further, when judging whether i-th of touch key-press is triggered, without being filtered place to the second charging duration
Reason, but the second baseline duration and the second charging duration are directly subjected to additive operation, therefore can further reduce work(
Consumption.
In addition, when in running order, if detecting, the duration that touch key-press is not triggered reaches preset duration, from
Working condition switches to low power consumpting state, so as to further reduce power consumption.
Description of the drawings
Fig. 1 is a kind of flow chart of touch key scanning method in the embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of existing finger touching touch key-press；
Fig. 3 is the working timing figure of touch key-press control chip under a kind of low-power consumption mode in the embodiment of the present invention；
Fig. 4 is the schematic diagram of inductance capacitance and reference capacitance in a kind of existing touch key-press control chip；
Fig. 5 is a kind of structure diagram of touch key-press scanning means in the embodiment of the present invention.
Specific embodiment
At present, in using the touch key-press of charge migration method control chip, touch key-press and benchmark electricity are provided with
Hold.For each touch key-press, there are corresponding inductance capacitance Cp for corresponding metal keyboard.It is set when on same chip
When there are multiple touch key-press, the corresponding switching circuit of touch key-press is closed by time-multiplexed mode successively, is touched with detecting
Touch whether button is triggered.
There is one-to-one switching circuit therewith in each touch key-press, be closed in switching circuit and touched without finger
During touch key-press, charged to reference capacitance Cx by inductance capacitance Cp, made a reservation for until the voltage on reference capacitance Cx reaches one
Value calculates the time of entire charging process.Capacitance Cfinger (hereinafter referred to as Cf) posting between human body and the earth on finger
Raw capacitance, when finger touches touch key-press, the capacitance on Cp becomes Cp+Cf.At this point, Cp charges to reference capacitance Cx
When, since the capacitance on Cp increases, the charging time shortens.In the prior art, pass through the variable quantity in charging time
To judge whether touch key-press is triggered.
With reference to Fig. 2, a kind of schematic diagram of existing finger touching touch key-press is given.Capacitance Cf on finger is human body
Relative to the parasitic capacitance of the earth, Cp is inductance capacitance, and Cs is electricity of the capacitance on finger relative to the corresponding ground of metal keyboard
Hold.Under normal conditions, Cs can be ignored.Therefore, when finger touches touch key-press, the capacitance on Cp becomes Cp+
Cf。
In practical applications, there are two kinds of operating modes for touch key-press control chip：Sleep pattern and operating mode.It is sleeping
Under sleep mode, touch key-press control chip is in low power consumpting state, to know whether touch key-press is triggered in time, may be used
Whether channel polling method detection touch key-press is triggered.However, in practical applications, it is understood that there may be following application scenarios：With
Touch key-press 1 is touched at family, and the corresponding touch key-press of touch channel of current poll is touch key-press 2.In these cases, exist
Next time during channel polling, it can just detect that user touches touch key-press, sweep time is longer, and power consumption is higher.
In embodiments of the present invention, when the corresponding wake-up period of low power consumpting state is at current time, all touch is controlled
It touches the corresponding switching circuit of button to be closed, at this point, the corresponding inductance capacitance of all touch key-press can be equivalent into a bulky capacitor.
By capacitor charging on the basis of bulky capacitor, trigger event is judged whether according to the first of reference capacitance the charging duration, so as to
Without poll, whether each touch key-press is triggered, therefore can effectively reduce scanning duration, and then reduces power consumption.
It is understandable for above-mentioned purpose, feature and advantageous effect of the invention is enable to become apparent, below in conjunction with the accompanying drawings to this
The specific embodiment of invention is described in detail.
An embodiment of the present invention provides a kind of touch key scanning methods, with reference to Fig. 1, are carried out below by way of specific steps detailed
It describes in detail bright.
Step S101 is currently at low power consumpting state detecting, and current time is in that low power consumpting state is corresponding to call out
During the awake period, the corresponding switching circuit of all touch key-press is controlled to be closed.
In specific implementation, can by touch key-press control chip touch key-press is scanned, can also by other with
The control device of touch key-press connection is scanned touch key-press.In practical applications, the state of touch key-press control chip
It can include working condition and low power consumpting state, touch key-press controls the power consumption of chip to be significantly larger than low-power consumption under working condition
The power consumption of touch key-press control chip under state.
Under low-power consumption mode, the corresponding wake-up period of touch key-press control chip and sleep cycle can be set.
Under low-power consumption mode, when touch key-press control chip is in wake-up period, touch key-press control chip, which is waken up and scans, is
It is no that there are touch key-press to be triggered；When touch key-press control chip is in sleep cycle, touch key-press control chip, which is in, sleeps
Dormancy state, will not go whether detection touch key-press is triggered.
That is, when touch key-press control chip is in wake-up period, touch key-press control chip is waken up, and
Scanning in duration is waken up to be triggered with the presence or absence of touch key-press.
In specific implementation, wake-up period can be preset and wakes up corresponding wake-up duration each time.Wake up week
Phase and wake-up duration can be set according to practical application scenarios.
In an embodiment of the present invention, set wake-up period as 1s, during wake-up a length of 0.25s namely：Touch key-press controls
Chip wakes up primary every 1s, and touch key-press control chip is often waken up once, the scan operation of a length of 0.25s during execution.
With reference to Fig. 3, the work of touch key-press control chip under a kind of low-power consumption mode in the embodiment of the present invention is given
Sequence diagram.At T1 moment~T2 moment, touch key-press control chip is in sleep cycle, at this point, at touch key-press control chip
In sleep state, the duration at T1 moment~T2 moment is sleep cycle.At T2~T3 moment, touch key-press control chip is in
Wake-up period, at this point, touch key-press control chip is waken up and scans and is triggered with the presence or absence of touch key-press, during T2 moment~T3
The duration at quarter is to wake up duration.At T3 moment~T4 moment, touch key-press control chip is in sleep cycle, at this point, touching
Key control chip is in sleep state, and the duration at T3 moment~T4 moment is sleep cycle.
From Fig. 3 also it can be seen that, when touch key-press control chip be in sleep cycle when, corresponding current power dissipation is small
Current power dissipation when touch key-press control chip is in wake-up period.
In specific implementation, when detect touch key-press control chip be currently at low power consumpting state, and at current time
When low power consumpting state corresponding wake-up period, judgement wakes up touch key-press control chip.Waking up touch key-press control chip
Later, the corresponding switching circuit of all touch key-press is controlled to be closed.
In practical applications, with reference to Fig. 4, inductance capacitance and benchmark in a kind of existing touch key-press control chip are given
The schematic diagram of capacitance.
It sets touch key-press control chip and includes N number of touch key-press, for each touch key-press, exist therewith one by one
Corresponding switching circuit and one-to-one inductance capacitance.As shown in figure 4,1 corresponding switching circuit of touch key-press for S11,
Corresponding inductance capacitance is Cp1；2 corresponding switching circuit of touch key-press is S12, corresponding inductance capacitance is Cp2；With such
It pushes away, the corresponding switching circuits of touch key-press N are S1N, and corresponding inductance capacitance is CpN.
When the corresponding switching circuit of some touch key-press is closed, by the corresponding inductance capacitance of the touch key-press to base
Pseudo-capacitance charges.
In embodiments of the present invention, low power consumpting state is currently at, and current time is in low power consumpting state detecting
During corresponding wake-up period, control the corresponding switching circuit of all touch key-press be closed namely control switching circuit S11~
S1N is closed.At this point, it is to the capacitance of inductance capacitance that reference capacitance charges：Cp_all=Cp1+Cp2+ ...+CpN namely
The sum of capacitance of the corresponding inductance capacitance of all touch key-press.
Step S102 acquires the first charging duration of reference capacitance, and judges whether to deposit according to the described first charging duration
In trigger event.
It in specific implementation, can be by preset first baseline after the first charging duration of reference capacitance is collected
Duration subtracts each other with the first charging duration, and obtained difference and preset first threshold are compared.When the first baseline duration with
When the difference of first charging duration is more than first threshold, then it can be determined that there are trigger event namely there is currently touch key-press quilts
Triggering；When the difference of the first baseline duration and the first charging duration is not more than first threshold, then it can be determined that there is no triggering things
It part namely is triggered currently without touch key-press.
In a particular application, following steps may be used and obtain the first baseline duration：When there is no during trigger event, by institute
After having switching circuit closure, acquire to reference capacitance charge to preset voltage value when required duration as the first baseline when
It is long.
In specific implementation, first threshold can be preset according to practical application scenarios.First baseline duration can be with
For fixed duration, or the duration of gradual change can be adjusted in due course.
In embodiments of the present invention, under current time, the first baseline duration can be：There is no triggering things for last time judgement
The first charging duration during part.That is, when judging that trigger event is not present in current time, the first of current time is filled
Electric duration is set as the first baseline duration of next wake-up period.
For example, a length of T1 when last judgement is charged there is no first during trigger event, then in current time, the first base
Line duration is preset as T1.
In embodiments of the present invention, it is corresponding according to all touch key-press when judging whether trigger event
The summation of inductance capacitance is determined.In wake-up period, the corresponding switching circuit of all touch key-press is closed, according to this
When get first charging duration can be determined whether that there are trigger events.And in the prior art, each is touched successively
It touches the corresponding switching circuit of button and is closed to carry out poll each touch key-press and whether be triggered.It can be seen that the embodiment of the present invention
It only needs to carry out once judging to know whether there are trigger event, therefore can effectively reduce scanning duration, and then reduce
Power consumption.
In specific implementation, when judgement is there is no during trigger event, touch key-press control chip can be in next wake-up
Period reawakes, and step S101~step S102 again, to judge to whether there is trigger event in next wake-up period.
Conversely, when judgement, there are during trigger event, it is meant that has at least one touch key-press to be triggered at this time.At this point, it touches
The touch key-press being triggered can be determined by touching key control chip.When judgement is there are during trigger event, core is controlled by touch key-press
The hardware components of piece perform discharge operation.
After judgement is there are trigger event, touch key-press control chip can control all switching circuits from closed state
Switch to off-state.After all switching circuits switch to off-state, touch key-press control all switches of chip controls
Circuit is closed successively；When a switching circuit is closed, remaining switching circuit is in off-state namely in synchronization
Only closed state is in there are one switching circuit.
For example, with reference to Fig. 4, after judgement is there are trigger event, touch key-press control chip first controls switching circuit S11
~S1N is disconnected, and switching circuit S11 is controlled to be closed later, and S12~S1N is controlled to disconnect；Complete sweeping for touch key-press 1
After retouching, control switching circuit S12 is closed, and control switching circuit S11, S13~S1N are disconnected, to be swept to touch key-press 2
It retouches.And so on, until switching circuit S1N is closed, other switching circuits disconnect, so as to fulfill sweeping for all touch key-press
It retouches.
It should be noted that in embodiments of the present invention, if without specified otherwise, the switching circuit is touch key-press
Corresponding switching circuit, and when switching circuit is connected, the corresponding inductance capacitance of touch key-press charges to reference capacitance.
After the corresponding switching circuit of each touch key-press is closed, on the basis of the corresponding inductance capacitance of the touch key-press
Capacitor charging, and then the second charging duration of capacitor charging on the basis of the corresponding inductance capacitance of the touch key-press can be collected.
According to the second charging duration, you can determine that the touch key-press whether there is trigger event.
In specific implementation, after judgement is there are trigger event, due to synchronization only there are one switching circuit be closed,
Therefore, the second charging duration of reference capacitance may not be waited with the first charging duration in step S102.For different touches
Button, when its corresponding switching circuit is closed, corresponding second charging duration may not also wait.Therefore, it can be directed to each
A touch key-press is respectively provided with one-to-one second charging duration.Due to the different corresponding second charging durations of touch key-press
Difference is smaller, or the second unified charging duration of all touch key-press settings.For example, one touch key-press pair of selection
The the second charging duration answered is as the corresponding second charging duration of all touch key-press.For another example, all touch key-press are calculated
The average value of corresponding second charging duration, as the corresponding second charging duration of all touch key-press.
Below for determining that i-th of button whether there is trigger event, to determining the touch key-press there are trigger event
It illustrates, i is positive integer and i≤N.
The corresponding switching circuit i of touch key-press control i-th of touch key-press of chip controls is closed, at this point, remaining is switched
Circuit is in off-state.Acquire the second charging duration Ti of reference capacitance when switching circuit i is closed.When charging according to second
Long Ti and preset second baseline duration, determine whether i-th of touch key-press is triggered.
For i-th of touch key-press, one-to-one second baseline duration therewith can be preset.At this point, during the second baseline
Length can be：When there is no during trigger event, the corresponding inductance capacitance of i-th of touch key-press charges to default electricity to reference capacitance
Duration needed for pressure value.
In addition it is also possible to for all touch key-press, the second unified baseline duration is preset.For example, it collects not
There are during trigger event, the corresponding inductance capacitance of each touch key-press charges to preset voltage value to reference capacitance and is taken
It is long, it is averaged, as the second unified baseline duration.
In specific implementation, directly the second baseline duration and the second charging duration Ti can be subtracted each other, the difference that will be obtained
It is compared with preset second threshold.When obtained difference is more than second threshold, i-th of touch key-press of judgement is triggered；
Conversely, when obtained difference is less than or equal to second threshold, i-th of touch key-press of judgement is not triggered namely is not present
Trigger event.
In specific implementation, it when determining whether i-th of touch key-press is triggered, can also first be filled to collected second
Electric duration Ti is filtered, and later subtracts each other the second baseline duration and the second charging duration Ti after filtering process, will
To difference be compared with second threshold.When obtained difference is more than second threshold, i-th of touch key-press of judgement is touched
Hair；Conversely, when obtained difference is less than or equal to second threshold, i-th of touch key-press of judgement is not triggered.
That is, in embodiments of the present invention, it, can be first split when judging whether i-th of touch key-press is triggered
The second charging duration Ti of collected reference capacitance is filtered when powered-down road i is closed, and is filled according to filtered second
Electric duration Ti determines whether to be triggered；It can also be filtered without the corresponding to i-th of touch key-press second charging duration Ti
Wave directly determines whether to be triggered according to the collected second charging duration Ti.
When directly according to the corresponding second charging duration Ti of i-th of touch key-press come when determining whether to be triggered, due to nothing
It need to be filtered, there is no need to open filtering process function, therefore can further reduce power consumption.
It in specific implementation, can be with when the duration Ti that charges to i-th of touch key-press corresponding second is filtered
It is filtered, can also be filtered using median filtering algorithm using average value filtering algorithm.It is appreciated that
It is that in practical applications, other filtering algorithms second charging duration Ti corresponding to i-th of touch key-press can also be used to carry out
Filtering process is not repeated herein.
It in specific implementation, can also be to i-th of touch key-press after determining that i-th of touch key-press is not triggered
Corresponding second baseline duration is adjusted, when the corresponding second baseline duration of i-th of touch key-press is adjusted to the second charging
Long Ti, also i.e. by the second baseline duration at current time be adjusted to it is last be not triggered when the second charging duration Ti.
In specific implementation, after judgement is there are trigger event, touch key-press controls chip to switch from low power consumpting state
To working condition, to respond the operation of user.If touch key-press control prolonged periods are in running order, and in preset duration
When interior touch key-press control chip does not detect the touching operation of user, to reduce power consumption, touch key-press can be controlled
The current state of chip switches to low power consumpting state from working condition.
In practical applications, can preset duration be set according to actual demand.In an embodiment of the present invention, setting is pre-
If when a length of 5s.In an alternative embodiment of the invention, preset duration is set as 20s.
For example, when touch key-press control chip is in running order, and do not detect that the touching of user operates in 5s
When, touch key-press control chip switches to low power consumpting state from working condition.
It is understood that the switching circuit in the embodiment of the present invention can be fully open or be closed, can also beat one by one
It opens or is closed, determine that setting means is more flexible to carry out the scanning of the touch key-press of different mode and judgement.And so on, also
It can judge whether touch key-press is triggered using modes such as dichotomies according to requirement of the system to power consumption and scanning duration, if
Open or close, the different charging duration of setting, baseline duration, filtering mode of different number switching circuit etc. is put, with into one
Step reduces power consumption and reduces scanning duration, and the specific arrange parameter embodiment of the present invention does not repeat.
With reference to Fig. 5, the embodiment of the present invention additionally provides a kind of touch key-press scanning means 50, including：Control unit 501,
Collecting unit 502 and judging unit 503, wherein：
Control unit 501, for being currently at low power consumpting state, and current time is in low power consumpting state pair detecting
During the wake-up period answered, the corresponding switching circuit of all touch key-press is controlled to be closed；
Collecting unit 502, for acquiring the first of reference capacitance the charging duration；
Judging unit 503, for judging whether trigger event, first charging according to the described first charging duration
The summation of duration inductance capacitance corresponding to all touch key-press is related；Touch key-press, switching circuit and inductance capacitance are one by one
It is corresponding.
In specific implementation, the judging unit 503 can be used for filling preset first baseline duration and described first
Electric duration subtracts each other, and obtained difference and preset first threshold are compared；When obtained difference is more than the first threshold
When, there are trigger events for judgement；When the obtained difference is not more than the first threshold, there is no trigger events for judgement；
It is a length of during first baseline：There is no during trigger event, the corresponding inductance capacitance of all touch key-press is to the benchmark
Duration needed for capacitor charging to preset voltage value.
In specific implementation, the touch key-press scanning means 50 can also include：First setting unit 506, for working as
Judging unit judgement is set as next wake-up period corresponding the there is no during trigger event, by the described first charging duration
One baseline duration.
In specific implementation, the touch key-press scanning means 50 can also include：Touch key-press determination unit 504 is used
After judging there are trigger event in the judging unit, the corresponding switching circuit of control all touch key-press is from closing
Conjunction state switches to off-state；The corresponding switching circuit of all touch key-press is controlled to be closed successively successively；When wherein one
In the closure state, remaining switching circuit is in off-state to a switching circuit；It is closed according to each switching circuit
When the corresponding reference capacitance second charging duration, determine the touch key-press there are trigger event.
In specific implementation, the touch key-press determination unit 504 can be used for controlling i-th of touch key-press corresponding
Switching circuit i is closed, and the corresponding switching circuit of other touch key-press disconnects；Obtain the base when switching circuit i is closed
Second charging duration Ti of pseudo-capacitance；According to the described second charging duration Ti and preset second baseline duration, described i-th is determined
Whether a touch key-press is triggered；The sum that i is positive integer and i≤N, N are the touch key-press；The second baseline duration
For：There is no during trigger event, the corresponding inductance capacitance of i-th of touch key-press charges to default electricity to the reference capacitance
Duration needed for pressure value.
In specific implementation, the touch key-press determination unit 504 can be used for the preset second baseline duration
Subtract each other with the described second charging duration Ti, obtained difference and preset second threshold are compared；When the obtained difference
When value is more than the preset second threshold, judge that i-th of touch key-press is triggered；When the obtained difference is not more than
During the second threshold, judge that i-th of touch key-press is not triggered.
In specific implementation, the touch key-press determination unit 504 can be used for carrying out the described second charging duration Ti
Filtering process, by the second baseline duration and filtered second charging duration Ti subtract each other, and by obtained difference with it is described
Second threshold is compared.
In specific implementation, following any filtering mode may be used, the described second charging duration Ti is filtered
Processing：Average value filtering, medium filtering.
In specific implementation, the touch key-press scanning means 50 can also include：Second setting unit 507, for
After determining that i-th of touch key-press is not triggered, the described second charging duration Ti is set as next wake-up period pair
The the second baseline duration answered.
In specific implementation, the touch key-press scanning means 50 can also include：Status toggle unit 505, Ke Yiyong
After in judgement there are trigger event, current state is in working condition from low power consumpting state switching.
In specific implementation, the status toggle unit 505 can be also used for detect that the touch key-press is not touched
When the duration of hair reaches preset duration, low power consumpting state is switched to from working condition.
The embodiment of the present invention additionally provides a kind of computer readable storage medium, is stored thereon with computer instruction, described
The step of touch key scanning method provided in any of the above-described embodiment of the present invention is provided when computer instruction is run, herein not
It repeats.
The embodiment of the present invention additionally provides another touch key-press scanning means, described to deposit including memory and processor
Computer instruction is stored on reservoir, what is provided in any of the above-described embodiment of the execution present invention when computer instruction is run touches
The step of touching key scanning method is not repeated herein.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
It is completed with indicating relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Any those skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (24)
1. a kind of touch key scanning method, which is characterized in that including：
Low power consumpting state is currently at detecting, and when current time is in low power consumpting state corresponding wake-up period, control
The corresponding switching circuit of all touch key-press is closed；
The first charging duration of reference capacitance is acquired, and trigger event is judged whether according to the described first charging duration, institute
The summation for stating the first charging duration inductance capacitance corresponding to all touch key-press is related；Touch key-press, switching circuit and sensing
Capacitance corresponds.
2. touch key scanning method as described in claim 1, which is characterized in that described to be sentenced according to the described first charging duration
It is disconnected to whether there is trigger event, including：
Preset first baseline duration and the described first charging duration are subtracted each other, by obtained difference and preset first threshold into
Row compares；
When the obtained difference is more than the first threshold, there are trigger events for judgement；When the obtained difference is little
When the first threshold, there is no trigger events for judgement；
It is a length of during first baseline：There is no during trigger event, the corresponding inductance capacitance of all touch key-press is to described
Reference capacitance charges to duration needed for preset voltage value.
3. touch key scanning method as claimed in claim 2, which is characterized in that further include：When judgement, there is no triggering things
During part, the described first charging duration is set as the corresponding first baseline duration of next wake-up period.
4. touch key scanning method as claimed in claim 2, which is characterized in that after judgement is there are trigger event, also
Including：
The corresponding switching circuit of all touch key-press is controlled to switch to off-state from closed state；
The corresponding switching circuit of all touch key-press is controlled to be closed successively successively；It is closed when one of switching circuit is in
During state, remaining switching circuit is in off-state；
The second charging duration of the corresponding reference capacitance, determines that there are trigger events when being closed according to each switching circuit
Touch key-press.
5. touch key scanning method as claimed in claim 4, which is characterized in that described to be closed according to each switching circuit
When the corresponding reference capacitance second charging duration, determine the touch key-press there are trigger event, including：
The corresponding switching circuit i of i-th of touch key-press is controlled to be closed, the corresponding switching circuit of other touch key-press disconnects；
Obtain the second charging duration Ti of the reference capacitance when switching circuit i is closed；
According to the described second charging duration Ti and preset second baseline duration, determine whether i-th of touch key-press is touched
Hair；The sum that i is positive integer and i≤N, N are the touch key-press；It is a length of during second baseline：There is no during trigger event,
The corresponding inductance capacitance of i-th of touch key-press charges to duration needed for preset voltage value to the reference capacitance.
6. touch key scanning method as claimed in claim 5, which is characterized in that described according to the described second charging duration Ti
With preset second baseline duration, determine whether i-th of touch key-press is triggered, including：
The second baseline duration and the described second charging duration Ti are subtracted each other, by obtained difference and preset second threshold into
Row compares；
When the obtained difference is more than the second threshold, judge that i-th of touch key-press is triggered；It is obtained when described
Difference when being not more than the second threshold, judge that i-th of touch key-press is not triggered.
7. touch key scanning method as claimed in claim 6, which is characterized in that described by the second baseline duration and institute
The second charging duration Ti is stated to subtract each other, including：
Described second charging duration Ti is filtered, by the second baseline duration and the filtered second charging duration
Ti subtracts each other, and obtained difference and the second threshold are compared.
8. touch key scanning method as claimed in claim 7, which is characterized in that right using following any filtering mode
The second charging duration Ti is filtered：Average value filtering, medium filtering.
9. touch key scanning method as claimed in claim 5, which is characterized in that further include：Determining i-th of touch
After button is not triggered, the described second charging duration Ti is set as the corresponding second baseline duration of next wake-up period.
10. touch key scanning method as described in claim 1, which is characterized in that further include：
After judgement is there are trigger event, current state is in working condition from low power consumpting state switching.
11. touch key scanning method as claimed in claim 10, which is characterized in that will currently switch from low power consumpting state
After being in working condition, further include：
When the duration for detecting that the touch key-press is not triggered reaches preset duration, low-power consumption shape is switched to from working condition
State.
12. a kind of touch key-press scanning means, which is characterized in that including：
Control unit, for being currently at low power consumpting state detecting, and current time is in that low power consumpting state is corresponding to call out
During the awake period, the corresponding switching circuit of all touch key-press is controlled to be closed；
Collecting unit, for acquiring the first of reference capacitance the charging duration；
Judging unit, for judging whether trigger event according to the described first charging duration, the first charging duration with
The summation of the corresponding inductance capacitance of all touch key-press is related；Touch key-press, switching circuit and inductance capacitance correspond.
13. touch key-press scanning means as claimed in claim 12, which is characterized in that the judging unit, for that will preset
The first baseline duration with described first charging duration subtract each other, obtained difference and preset first threshold are compared；When
When the obtained difference is more than the first threshold, there are trigger events for judgement；When the obtained difference is no more than described
During first threshold, there is no trigger events for judgement；It is a length of during first baseline：It is described all to touch there is no during trigger event
It touches the corresponding inductance capacitance of button and charges to duration needed for preset voltage value to the reference capacitance.
14. touch key-press scanning means as claimed in claim 13, which is characterized in that further include：First setting unit, is used for
When trigger event is not present in judging unit judgement, it is corresponding that the described first charging duration is set as next wake-up period
First baseline duration.
15. touch key-press scanning means as claimed in claim 13, which is characterized in that further include：Touch key-press determination unit,
After judging there are trigger event in the judging unit, the corresponding switching circuit of control all touch key-press from
Closed state switches to off-state；The corresponding switching circuit of all touch key-press is controlled to be closed successively successively；When wherein
In the closure state, remaining switching circuit is in off-state to one switching circuit；It is closed according to each switching circuit
The second charging duration of the corresponding reference capacitance, determines the touch key-press there are trigger event during conjunction.
16. touch key-press scanning means as claimed in claim 15, which is characterized in that the touch key-press determination unit is used
In the corresponding switching circuit i of i-th of touch key-press is controlled to be closed, the corresponding switching circuit of other touch key-press disconnects；It obtains
Second charging duration Ti of the reference capacitance when switching circuit i is closed；According to the described second charging duration Ti with presetting
The second baseline duration, determine whether i-th of touch key-press is triggered；I is positive integer and i≤N, N are pressed for the touch
The sum of key；It is a length of during second baseline：There is no during trigger event, the corresponding inductance capacitance of i-th of touch key-press
Duration needed for preset voltage value is charged to the reference capacitance.
17. touch key-press scanning means as claimed in claim 16, which is characterized in that the touch key-press determination unit is used
Subtract each other in by the second baseline duration and the described second charging duration Ti, obtained difference and preset second threshold are carried out
Compare；When the obtained difference is more than the second threshold, judge that i-th of touch key-press is triggered；It is obtained when described
When the difference arrived is not more than the second threshold, judge that i-th of touch key-press is not triggered.
18. touch key-press scanning means as claimed in claim 17, which is characterized in that the touch key-press determination unit is used
It is filtered in the described second charging duration Ti, by the second baseline duration and the filtered second charging duration Ti
Subtract each other, and obtained difference and the second threshold are compared.
19. touch key-press scanning means as claimed in claim 18, which is characterized in that following any filtering mode is used,
Described second charging duration Ti is filtered：Average value filtering, medium filtering.
20. touch key-press scanning means as claimed in claim 19, which is characterized in that further include：Second setting unit, is used for
After determining that i-th of touch key-press is not triggered, the described second charging duration Ti is set as next wake-up period
Corresponding second baseline duration.
21. touch key-press scanning means as claimed in claim 12, which is characterized in that further include：Status toggle unit is used for
After judgement is there are trigger event, current state is in working condition from low power consumpting state switching.
22. touch key-press scanning means as claimed in claim 21, which is characterized in that the status toggle unit is additionally operable to
When the duration for detecting that the touch key-press is not triggered reaches preset duration, low power consumpting state is switched to from working condition.
23. a kind of computer readable storage medium, is stored thereon with computer instruction, which is characterized in that the computer instruction
Perform claim requires the step of 1~11 any one of them touch key scanning method during operation.
24. a kind of touch key-press scanning means including memory and processor, is stored with computer-readable deposit on the memory
Storage media, which is characterized in that perform claim requires 1~11 any one of them touch key-press to sweep during the computer instruction operation
The step of retouching method.
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