CN105867927B - A kind of the Macintosh grasp shoot device and its method of mobile terminal - Google Patents
A kind of the Macintosh grasp shoot device and its method of mobile terminal Download PDFInfo
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- CN105867927B CN105867927B CN201610190193.0A CN201610190193A CN105867927B CN 105867927 B CN105867927 B CN 105867927B CN 201610190193 A CN201610190193 A CN 201610190193A CN 105867927 B CN105867927 B CN 105867927B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
- G06F9/4418—Suspend and resume; Hibernate and awake
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
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- Input From Keyboards Or The Like (AREA)
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Abstract
The invention discloses the Macintosh grasp shoot device and its method of a kind of mobile terminal, Macintosh grasp shoot device is connected between Macintosh and camera, including detection module, voltage comparator and central processing unit;Pass through the down state of detection module real-time detection Macintosh and exports corresponding detection voltage to voltage comparator;Voltage comparator judgement detection voltage wakes up central processing unit when being less than preset reference voltage;Central processing unit forbidden energy voltage comparator simultaneously starts camera, judges whether Macintosh is pressed and controls the operating status of camera according to judging result;Due to first starting camera, camera can be run when Macintosh is pressed, shortens the response time of camera, accelerates candid photograph speed, solve the problems, such as that the starting time effects of camera in existing mobile terminal capture speed.
Description
Technical field
The present invention relates to technical field of mobile terminals, in particular to the Macintosh grasp shoot device of a kind of mobile terminal and its side
Method.
Background technique
Currently, camera function has been prevalent in mobile terminal, and taking pictures is also one of daily most common function.It claps
According to when the scene that has it is often written in water, therefore there is an urgent need to a kind of candid photograph functions.Existing some mobile phones have been provided with candid photograph function
Can, such as currently a popular hammer mobile phone (smartisan t1), the mobile phone is under screen locking (blank screen) state, if detecting two
Key presses simultaneously, camera i.e. capable of fast starting and is captured.
By taking the effective Pen-down detection of low level as an example, as shown in Figure 1, being first when carrying out screen locking candid photograph in the prior art
Shake is had when key is pressed, and is a stable low level later.When holding, the stable low level reaches certain time
Key range is pressed.When two preset Macintosh are judged as pressing simultaneously, just wake up central processing unit and start camera.
Camera can be captured after completing starting.Mobile terminal is in the time captured under bright screen working condition and screen locking is captured
It is identical.It is pressed based on key, to detecting that once completely pressing process needs one section of retention time, camera itself also has one
The Duan Qidong time.It is only after waiting camera to start and captures the time.And the starting time of camera has obviously influenced the speed captured
Degree.
Therefore, it is necessary to be improved to the prior art.
Summary of the invention
Place in view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of Macintosh of mobile terminal to grab
Devices and methods therefor is clapped, the starting time effects of camera capture speed when solving the problem of that existing mobile terminal is captured.
In order to achieve the above object, this invention takes following technical schemes:
A kind of Macintosh grasp shoot device of mobile terminal, is connected between Macintosh and camera comprising detection module, electricity
Press comparator and central processing unit;
The down state of the detection module real-time detection Macintosh simultaneously exports corresponding detection voltage to voltage comparator;
Voltage comparator judgement detection voltage wakes up central processing unit when being less than preset reference voltage;Central processing unit forbidden energy voltage ratio
Compared with device and start camera, judges whether Macintosh is pressed and controls the operating status of camera according to judging result.
In the Macintosh grasp shoot device of the mobile terminal, the detection module include: first resistor, second resistance,
Comparator and selecting unit;The Macintosh includes the first key and the second key;
One end connection one end of the first key of the first resistor, the inverting input terminal of comparator, selecting unit the
The other end of the VKEY1 foot of one input terminal and central processing unit, first resistor connects power end;One end connection the of second resistance
One end of two keys, the non-inverting input terminal of comparator, the second input terminal of selecting unit and central processing unit VKEY2 foot,
The other end of two resistance connects power end;The other end of the other end of first key and the second key is grounded;The comparator
Output end connection selecting unit control terminal, selecting unit output end connection voltage comparator IN1 foot;
The output end of the IN1 foot connection selecting unit of voltage comparator, the IN2 foot input reference voltage of voltage comparator,
The GPIO1 foot of the OUT foot connection central processing unit of voltage comparator, the EN foot connection central processing unit of voltage comparator
GPIO2 foot.
In the Macintosh grasp shoot device of the mobile terminal, the resistance value of the first resistor and second resistance is equal.
In the Macintosh grasp shoot device of the mobile terminal, the selecting unit includes phase inverter, first switch and
Two switches;
The output end of the input terminal connection comparator of the phase inverter and the control terminal of first switch, the output end of phase inverter
The control terminal of second switch is connected, the input terminal of first switch is the first input end of selecting unit, the input terminal of second switch
For the second input terminal of selecting unit, the tie point of the output end of the output end and second switch of first switch is selecting unit
Output end.
A kind of Macintosh grasp shoot method of the Macintosh grasp shoot device using the mobile terminal comprising:
A, the down state of detection module real-time detection Macintosh and corresponding detection voltage is exported to voltage comparator;
B, central processing unit is waken up when voltage comparator judgement detection voltage is less than preset reference voltage;
C, central processing unit forbidden energy voltage comparator and start camera, judge whether Macintosh is pressed and according to sentencing
The operating status of disconnected result control camera.
In the Macintosh grasp shoot method, in the step C, judges whether Macintosh is pressed and specifically includes:
Judge whether the voltage on the VKEY1 foot and VKEY2 foot of central processing unit is low level and keeps preset time:
It is to judge that Macintosh is pressed, is otherwise judged as maloperation.
In the Macintosh grasp shoot method, in the step C, had according to the operating status that judging result controls camera
Body includes:
When judging that Macintosh is pressed, camera is switched to foreground by central processing unit;
When being judged as maloperation, central processing unit closes camera, enables voltage comparator.
Compared to the prior art, the Macintosh grasp shoot device and its method of mobile terminal provided by the invention, passes through detection
The down state of module real-time detection Macintosh simultaneously exports corresponding detection voltage to voltage comparator;Voltage comparator judgement inspection
It surveys when voltage is less than preset reference voltage and wakes up central processing unit;Central processing unit forbidden energy voltage comparator simultaneously starts camera,
Judge whether Macintosh is pressed and controls the operating status of camera according to judging result;Due to first starting camera, combining
Key can run camera when being pressed, and shorten the response time of camera, accelerate candid photograph speed, solve existing mobile whole
The starting time effects of camera capture the problem of speed in end.
Detailed description of the invention
Fig. 1 is the schematic diagram that the voltage status by key pressing of existing mobile terminal is run with corresponding camera.
Fig. 2 is the structural block diagram of the Macintosh grasp shoot device of mobile terminal provided by the invention.
Fig. 3 is that the voltage status by key pressing of Macintosh grasp shoot device provided by the invention is shown with what corresponding camera was run
It is intended to.
Fig. 4 is the schematic diagram that the voltage status that Macintosh provided by the invention is not fully pressed is run with corresponding camera.
Fig. 5 is Macintosh grasp shoot method flow chart provided by the invention.
Specific embodiment
The present invention provides the Macintosh grasp shoot device and its method of a kind of mobile terminal.By the way that a reference voltage is arranged
Vth is engraved in backstage starting camera when detecting the level of any one key in Macintosh lower than reference voltage Vth;Later
If detecting, Macintosh is pressed, and camera is switched to front stage operation, is greatly improved the sound that camera starting is captured in this way
Speed is answered, and simple and easy, progress camera starting more faster than the prior art.To make the purpose of the present invention, technical solution and effect
Fruit is clearer, clear, and the present invention is described in more detail as follows in conjunction with drawings and embodiments.It should be appreciated that this place
Specific examples are only used to explain the present invention for description, is not intended to limit the present invention.
Please refer to Fig. 2 and Fig. 3, the Macintosh grasp shoot device of mobile terminal provided by the invention be connected to Macintosh and
Between camera.What is be arranged in the Macintosh, that is, existing mobile terminal is used to start two keys for capturing function, such as volume key
And switch key.The Macintosh and camera are the prior art, are not described further herein.The candid photograph function of mobile terminal can be
It is carried out under screen locking (blank screen) state, can also be carried out under bright screen working condition, be the down state by detection combination key
To determine whether function is captured in starting.The present embodiment increased Macintosh grasp shoot device between Macintosh and camera is able to satisfy
The candid photograph of two kinds of situations is stated, and can quick start camera.
The Macintosh grasp shoot device includes detection module 100, voltage comparator 200 and central processing unit 300.The inspection
It surveys the down state of 100 real-time detection Macintosh of module and exports corresponding detection voltage to voltage comparator 200.Voltage compares
The judgement detection voltage of device 200 wakes up central processing unit 300 when being less than preset reference voltage Vth.Central processing unit 300 forbidden energy electricity
It presses comparator 200 and starts camera on backstage, judge whether Macintosh is pressed and controls the fortune of camera according to judging result
Row state.Operating status includes the camera that camera is switched to foreground and closes backstage.
Voltage is pulled low when being pressed based on two keys in Macintosh, and has sequencing (successively interval time
It is very short), which compares the key voltage of two keys, and the key voltage being lower at first is defeated as detection voltage
Out.If two keys are not pressed, corresponding key voltage is high level, and detection module 100 exports high level.This implementation
In example, the detection module 100 includes first resistor R1, second resistance R2, comparator U and selecting unit 110.First electricity
Hinder one end connection one end of the first key K1 of R1,1 and of first input end of the inverting input terminal of comparator U, selecting unit 110
The other end of the VKEY1 foot of central processing unit, first resistor R1 connects power end VDD;One end connection second of second resistance R2
One end of key K2, the non-inverting input terminal of comparator U, selecting unit 110 the second input terminal 2 and central processing unit VKEY2
The other end of foot, second resistance R2 connects power end VDD;The other end of the other end of first key K1 and the second key K2 connect
Ground;The control terminal 3 of the output end connection selecting unit 110 of the comparator U, the output end 4 of selecting unit 110 connect voltage ratio
Compared with the IN1 foot of device.
The output end 4 of the IN1 foot connection selecting unit 110 of the voltage comparator 200, the IN2 foot of voltage comparator 200
Input reference voltage Vth, the GPIO1 foot of the OUT foot connection central processing unit 300 of voltage comparator 200, voltage comparator 200
EN foot connection central processing unit 300 GPIO2 foot.When the voltage on the IN1 foot of voltage comparator 200 is more than or equal to IN2 foot
Voltage when, the OUT foot of voltage comparator 200 exports high level;When the voltage of voltage comparator IN1 foot is less than the electricity of IN2 foot
When pressure, the OUT foot of voltage comparator exports low level.Wherein, reference voltage Vth is the half of IN1 foot high level voltage.It is described
The model lm211 of voltage comparator 200, power supply foot are used as EN foot.
The VKEY1 foot and VKEY2 foot of central processing unit are for judging whether Macintosh is pressed.When Macintosh not by
When pressing, central processing unit detects that the voltage on VKEEY1 foot and VKEY2 foot is high level.When any key is pressed,
Corresponding VKEEY foot is low level.The GPIO1 foot of central processing unit 300 detects whether voltage is lower than reference voltage for judging
Vth is that then the input of GPIO1 foot wakes up central processing unit 300, does not otherwise operate.Centre is waken up if GPIO1 foot is low level
Manage device, be high level then central processing unit without response.Whether the GPIO2 foot of central processing unit is for controlling voltage comparator 200
Work, as enabled voltage comparator if central processing unit control GPIO2 foot output high level, GPIO2 foot exports low level then
Forbidden energy voltage comparator.The model msm8909 of central processing unit 300, connection type and existing mobile terminal with camera
Middle associative processor is identical with the connection type of camera, is the prior art, i.e., passes through several between camera and central processing unit
The connection such as power supply foot, several control feet, several the first communication feet, several the second communication foot, clock feet.When starting camera
When, central processing unit first enables foot of powering, and then exports certain timing by control foot again, then communicates foot to phase by first
Initialization sequence is written in machine, exports clock by clock foot, and last camera communicates during image data is sent to by foot by second
Central processor.
The selecting unit 110 includes phase inverter inv, first switch S1 and second switch S2.The phase inverter inv's is defeated
Enter the output end of end connection comparator U and the control terminal of first switch S1, the output end connection second switch S2's of phase inverter inv
Control terminal, the input terminal of first switch S1 are the first input end 1 of selecting unit 110, and the input terminal of second switch S2 is selection
Second input terminal 2 of unit 110, the tie point of the output end of the output end and second switch S2 of first switch S1 are selecting unit
110 output end 4.
Wherein, the resistance value of the first resistor R1 and second resistance R2 is equal.The control of first switch S1 and second switch S2
When end processed is high level, the input terminal of two switches is connect with output end, switch conduction;When control terminal is low level, two
The input terminal of switch is not connected to output end, and switch disconnects.Relay, control terminal can be used in first switch S1 and second switch S2
It obtains electric (for high level) to be attracted to be connected, power loss (for low level) disconnects.NMOS tube, control terminal, that is, NMOS tube can also be used
Grid, input terminal, that is, NMOS tube source electrode, the drain electrode of output end, that is, NMOS tube, grid are high level then NMOS transistor conduction, grid
For low level, then NMOS tube is ended.
Please continue to refer to Fig. 2 and Fig. 3, the working principle of the Macintosh grasp shoot device are as follows:
When Macintosh is not pressed, the key voltage of two keys is drawn high by power end VDD.Due to first resistor R1
Equal with the resistance value of second resistance R2, then two key voltages are equal.Comparator U at this time is equivalent to two input terminals and is connected in one
It rises, makees phase inverter use, the control terminal 3 of output low level to selecting unit 110, first switch S1 is disconnected, and low level is by anti-
Phase device inv reverse phase becomes high level, then the conducting of second switch S2 closure, and the key voltage of the high level of the second key K2 is as inspection
Voltage output is surveyed to voltage comparator 200.Voltage on IN1 foot is greater than IN2 foot reference voltage Vth, voltage comparator 200
OUT foot exports high level, and central processing unit is without response.
When Macintosh is pressed, it is assumed that the first key K1 first presses (herein press refer to not fully pressed), and first presses
The key voltage dithering of key K1 is lower, as shown in Figure 3.Second key K2 is still high level, and comparator U exports high level control at this time
First switch S1 conducting processed, meanwhile, it is disconnected which becomes low level, control second switch S2 after phase inverter inv is reversed
It opens.The key voltage output of first key K1 is compared into voltage comparator 200.When under the key voltage of the first key K1
When being brought down below reference voltage Vth, the OUT foot output low level of voltage comparator 200 wakes up central processing unit 300.Centre
It manages 300 forbidden energy voltage comparator 200 of device and starts camera on backstage.Whether key voltage, which changes, so is all no longer compared,
Subsequent processing will not be influenced key voltage dithering;Simultaneously also by the starting time advance of camera, camera can be shortened
Response time.
Then central processing unit 300 judges whether Macintosh is pressed, that is, judges on its VKEY1 foot and VKEY2 foot
Whether voltage is low level and keeps one section of preset time: being to judge that Macintosh is pressed completely, central processing unit 300 is by phase
Machine-cut to foreground can capture.If stable low level is not up to certain time key voltage and just rises and (may accidentally press),
As shown in Figure 4;Or the key voltage of another key remains high level, then Macintosh is not pressed, is judged as mistake
Operation, central processing unit 300 close the camera on backstage, and enabled voltage comparator compares again, detect mobile terminal again.
Macintosh grasp shoot device based on above-mentioned mobile terminal, the present invention also provides a kind of Macintosh of mobile terminal to grab
Shooting method, as shown in figure 5, the Macintosh grasp shoot method includes:
S100, detection module real-time detection Macintosh down state and export corresponding detection voltage and compare to voltage
Device.
S200, voltage comparator judgement detection voltage wake up central processing unit when being less than preset reference voltage.
S300, central processing unit forbidden energy voltage comparator simultaneously start camera, judge whether Macintosh is pressed and basis
The operating status of judging result control camera.
The present embodiment is mainly whether two keys in detection combination key are pressed, if having one be pressed and its
Key voltage is less than reference voltage, just wakes up central processing unit;Continue judge whether two keys are complete by central processing unit
It presses entirely.Judge Macintosh whether be pressed can the voltage on the VKEY1 foot and VKEY2 foot by judging central processing unit be
It is no to be low level and keep preset time: to be to judge that Macintosh is pressed, be otherwise judged as maloperation.When judgement is combined
When key is pressed, camera can be switched to foreground by central processing unit.When being judged as maloperation, central processing unit closes backstage
Camera enables voltage comparator.Specific steps can be found in the working principle of said combination key grasp shoot device.
In conclusion the Macintosh grasp shoot device and its method of mobile terminal provided by the invention, by detecting combination
When any key is pressed in key, and key voltage is less than reference voltage and is just engraved in backstage starting camera, then confirms two
The camera on backstage is switched to foreground again when key is really pressed, function is captured in starting.With need to confirm group in the prior art
Conjunction key just starts camera after being pressed and compares, and shortens the response time of camera, starts candid photograph function faster, enhances phase
The reaction sensitivity of machine.
It, can according to the technique and scheme of the present invention and its 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 all should belong to the guarantor of appended claims of the invention
Protect range.
Claims (6)
1. a kind of Macintosh grasp shoot device of mobile terminal, is connected between Macintosh and camera, which is characterized in that including detection
Module, voltage comparator and central processing unit;
The down state of the detection module real-time detection Macintosh simultaneously exports corresponding detection voltage to voltage comparator;Voltage
Comparator judgement detection voltage wakes up central processing unit when being less than preset reference voltage;Central processing unit forbidden energy voltage comparator
And start camera, judge whether Macintosh is pressed and controls the operating status of camera according to judging result;
The detection module includes: first resistor, second resistance, comparator and selecting unit;The Macintosh is pressed including first
Key and the second key;
One end connection one end of the first key of the first resistor, the inverting input terminal of comparator, selecting unit it is first defeated
Enter the VKEY1 foot of end and central processing unit, the other end of first resistor connects power end;One end connection second of second resistance is pressed
One end of key, the non-inverting input terminal of comparator, the second input terminal of selecting unit and central processing unit VKEY2 foot, second electricity
The other end of resistance connects power end;The other end of the other end of first key and the second key is grounded;The comparator it is defeated
Outlet connects the control terminal of selecting unit, the IN1 foot of the output end connection voltage comparator of selecting unit;
The output end of the IN1 foot connection selecting unit of voltage comparator, the IN2 foot input reference voltage of voltage comparator, voltage
The GPIO1 foot of the OUT foot connection central processing unit of comparator, the GPIO2 foot of the EN foot connection central processing unit of voltage comparator.
2. the Macintosh grasp shoot device of mobile terminal according to claim 1, which is characterized in that the first resistor and
The resistance value of two resistance is equal.
3. the Macintosh grasp shoot device of mobile terminal according to claim 1, which is characterized in that the selecting unit includes
Phase inverter, first switch and the second switch;
The output end of the input terminal connection comparator of the phase inverter and the control terminal of first switch, the output end connection of phase inverter
The control terminal of second switch, the input terminal of first switch are the first input end of selecting unit, and the input terminal of second switch is choosing
The second input terminal of unit is selected, the tie point of the output end of the output end and second switch of first switch is the output of selecting unit
End.
4. a kind of Macintosh grasp shoot method of the Macintosh grasp shoot device using mobile terminal described in claim 1, feature
It is, comprising:
A, the down state of detection module real-time detection Macintosh and corresponding detection voltage is exported to voltage comparator;
B, central processing unit is waken up when voltage comparator judgement detection voltage is less than preset reference voltage;
C, central processing unit forbidden energy voltage comparator and start camera, judge whether Macintosh is pressed and ties according to judgement
The operating status of fruit control camera.
5. Macintosh grasp shoot method according to claim 4, which is characterized in that in the step C, judge that Macintosh is
No be pressed specifically includes:
Judge whether the voltage on the VKEY1 foot and VKEY2 foot of central processing unit is low level and keeps preset time: being then
Judge that Macintosh is pressed, is otherwise judged as maloperation.
6. Macintosh grasp shoot method according to claim 5, which is characterized in that in the step C, according to judging result
The operating status of control camera specifically includes:
When judging that Macintosh is pressed, camera is switched to foreground by central processing unit;
When being judged as maloperation, central processing unit closes camera, enables voltage comparator.
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