CN109038709A - A kind of identification circuit of key, method and blender - Google Patents
A kind of identification circuit of key, method and blender Download PDFInfo
- Publication number
- CN109038709A CN109038709A CN201810764612.6A CN201810764612A CN109038709A CN 109038709 A CN109038709 A CN 109038709A CN 201810764612 A CN201810764612 A CN 201810764612A CN 109038709 A CN109038709 A CN 109038709A
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- China
- Prior art keywords
- key
- charging
- circuit
- time
- processing unit
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
The present invention is suitable for recognition by pressing keys technical field, provides the present invention and provides identification circuit, method and the blender of a kind of key, the circuit includes: the charging circuit being switched on when key to be identified is pressed；And when the key to be identified is pressed, the charging time of charging circuit charging complete switched on is recorded, the processing unit of recognition by pressing keys is completed.The port I/O of the present invention only through the processing unit can detect the multiple keys of identification, overcome the defect that existing scanning recognition method needs multiple ports I/O to carry out key range.
Description
Technical field
The invention belongs to recognition by pressing keys technical field more particularly to a kind of identification circuits of key, method and blender.
Background technique
Key detection in the prior art is carried out using scanning mode, and the I/O port of multiple MCU is needed to carry out key detection
Identification, and as number of keys to be detected increases, need more I/O port detection identifications；The electricity of such as blender etc
Control product is easy to appear that number of keys is too big and substrate size small the problem of being unable to satisfy key detection demand, it is therefore necessary to benefit
New departure of multiple recognition by pressing keys is carried out with less I/O port to avoid such case.
Summary of the invention
The present invention provides a kind of identification circuit of key, it is intended to solve that the number of keys of electric control product is too big and substrate size
Small the problem of being unable to satisfy recognition by pressing keys demand.
The invention is realized in this way a kind of identification circuit of key, the circuit include:
The charging circuit being switched on when key to be identified is pressed；And
When the key to be identified is pressed, the charging time that charging circuit switched on completes charging is recorded, is completed
The processing unit of recognition by pressing keys.
Further, the charging circuit uses RC circuit, specifically includes:
One end connects out-put supply, and the other end connects the first resistor of the processing unit；
The charging capacitor of concatenated different capacitances is distinguished from first resistor；
Described key one end to be identified is connected on the connecting line between the processing unit and the first resistor, described
One end of charging capacitor is grounded, and the other end is connected to the key other end to be identified.
Further, the circuit further includes for being phase inductive charging electricity after flicking in the key to be identified being pressed
The second resistance of discharge capacitor.
Further, the circuit further includes that the port I/O of the processing unit is made only to be in low level or high level
Trigger.
Further, the port I/O of the processing unit is the port external interrupt I/O.
Further, the processing unit includes:
Timing subelement, the charging time of the charging circuit charging complete for recording the key conducting to be identified；
Comparison subunit takes for the charging time and the standard comparison time in input system in advance to compare
With key corresponding to the immediate standard comparison time in charging time as the button value pressed.
Further, the processing unit further include:
Standard subelement, when being connected for successively recording the corresponding charging circuit of each key, when completing the charging of charging
Between, as the key standard comparison time.
The present invention also provides a kind of methods of above-mentioned recognition by pressing keys circuit key range, and the method includes walking as follows
It is rapid:
Key conducting charging circuit to be identified is pressed, charging circuit is started to charge；
Record the charging time that the charging circuit completes charging；
The charging time and the standard comparison time in input system in advance are compared, taken closest with the charging time
The key standard comparison time corresponding to key as the button value pressed.
Further, this method further includes following steps:
When successively recording the corresponding charging circuit of each key and connecting, the charging time of charging is completed, as key standard
Comparison time.
The present invention also provides a kind of blenders, including above-mentioned recognition by pressing keys circuit.
The present invention realizes recognition by pressing keys by charging circuit and processing unit, and charging circuit is led when key to be identified is pressed
It is logical, it is completed by processing unit record charging circuit switched on the charging time of charging, the time required to different charging circuit chargings
Difference, only a port I/O through the processing unit is the charging time timing for being able to achieve different charging circuits, by the charging time
It is compared with the key standard comparison time in input system in advance, can determine the key to be identified being pressed, complete key
Identification, the present invention overcomes existing scanning recognition methods, and multiple ports I/O to be needed to carry out the defect of key range.
Detailed description of the invention
Fig. 1 is a kind of identification circuit figure for key that the embodiment of the present invention one or embodiment two provide；
Fig. 2 is a kind of identification circuit figure for key that the embodiment of the present invention three provides；
Fig. 3 is a kind of identification circuit figure for key that the embodiment of the present invention four provides；
Fig. 4 is a kind of identification circuit figure for key that another embodiment of the present invention provides；
Fig. 5 is the frame structure schematic diagram of processing unit in one embodiment of the invention；
Fig. 6 is the frame structure schematic diagram of processing unit in another embodiment of the present invention；
Fig. 7 is a kind of recognition methods flow chart for key that the embodiment of the present invention 8 provides；
Fig. 8 is a kind of recognition methods flow chart for key that the embodiment of the present invention 9 provides.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Key detection in the prior art is carried out using scanning mode, and multiple I/O ports is needed to carry out key detection identification,
And as number of keys to be identified increases, more I/O port detection identifications are needed；The automatically controlled production of such as blender etc
Product are easy to appear that number of keys is too big and substrate size small the problem of being unable to satisfy key detection demand.The present invention is using to be identified
The charging circuit being switched on when key is pressed, and when the key to be identified is pressed, record charging electricity switched on
The charging time of road charging complete completes the processing unit of recognition by pressing keys, make a port I/O of processing unit can confirm that by
The key to be identified pressed, completes the identification of key.
Embodiment one
As shown in Figure 1, the embodiment of the invention provides a kind of identification circuits of key, comprising:
The charging circuit being switched on when key to be identified is pressed；And
When key to be identified is pressed, the charging time that charging circuit switched on completes charging is recorded, completes key
The processing unit MCU of identification.
In this embodiment, the function of processing unit is complete by MCU (Microcontroller Unit, micro-control unit)
At the preferred model 94F1102AMB of MCU.The present invention realizes recognition by pressing keys by charging circuit and processing unit MCU, to be identified
Charging circuit is connected when key is pressed, and the charging time of charging is completed by processing unit MCU record charging circuit switched on,
Different the time required to different charging circuit chargings, only a port I/O of MCU is able to achieve different charging electricity through the processing unit
Charging time and key standard comparison time in input system in advance are compared, can be determined by the charging time timing on road
The key to be identified being pressed, completes the identification of key, and the present invention overcomes existing scanning recognition methods to need multiple ports I/O
Carry out the defect of key range.
Embodiment two
As shown in Figure 1, the embodiment of the invention provides a kind of identification circuit of key, the key provided by embodiment one
Identification circuit on the basis of, charging circuit use RC circuit, specifically include:
One end connects out-put supply, and the other end connects the first resistor R ' of the processing unit MCU；
From charging capacitor C1~Cn of the concatenated different capacitances of first resistor R ' difference；
The one end key K1~Kn to be identified is connected on the connecting line between processing unit MCU and first resistor, charging electricity
Hold one end ground connection of C1~Cn, the other end is connected to key K1~Kn other end to be identified.
In the embodiment, by the way that first resistor R ' to be connected to a port I/O of processing unit MCU, realize that enhancing is defeated
Key K1~Kn is connected on the connecting line between processing unit MCU and first resistor R ', respectively presses by the driving capability of pin out
Also connect the different capacitor C1~Cn of a capacitance respectively on key, realizes when a certain key in key K1~Kn is pressed,
First resistor R ' and the concatenated capacitor of the key form one group of RC circuit.Capacitor C1~Cn is for charging, due to the capacitance of capacitor
Difference, then it is different the time required to different group RC circuit chargings, different groups of RC electricity are only able to achieve by the port I/O of a MCU
The charging time timing on road makes comparisons timing time with input system Plays comparison time in advance, can determine by by
Under key, complete key K1~Kn identification.
Embodiment three
As shown in Fig. 2, the embodiment of the invention provides a kind of identification circuit of key, the key provided by embodiment two
Identification circuit on the basis of, circuit further includes for being the second electricity of corresponding charging capacitor electric discharge after flicking in the key being pressed
Resistance.
In this embodiment, capacitor C1~Cn difference second resistance R1~Rn in parallel, for being flicked in the key being pressed
It discharges afterwards to corresponding capacitor.
Example IV
As shown in figure 3, the embodiment of the invention provides a kind of identification circuit of key, the key provided by embodiment one
Identification circuit on the basis of, the circuit further includes the touching for making the port I/O of processing unit MCU only be in low level or high level
Send out device.
In this embodiment, the port I/O of described trigger one end connection processing unit MCU, other end connection described the
One resistance R ', key one end are connected on the connecting line between the trigger and the first resistor R ', the trigger pair
Signal waveform carries out the port I/O of input processing unit MCU after shaping, and the port I/O of processing unit MCU is made only to be in low level
Or high level two states.
In addition, can be combined with the technical solution of embodiment three on the basis of example IV, shown in Fig. 4 one is formed
The identification circuit of kind key.
Embodiment five
The embodiment of the invention provides a kind of identification circuit of key, the identification circuits of the key provided by embodiment one
On the basis of, the port I/O of processing unit MCU is more preferably the port external interrupt I/O, can be improved recognition by pressing keys circuit
Real-time.
Embodiment six
As shown in figure 5, processing unit MCU includes:
Timing subelement 10, the charging time of the charging circuit charging complete for recording key conducting to be identified；
Comparison subunit 20, for charging time and the standard comparison time in input system in advance to be compared, take with
Key corresponding to the immediate standard comparison time in charging time is as the button value pressed.
Embodiment seven
As shown in fig. 6, processing unit further include:
Standard subelement 30 completes the charging of charging when connecting for successively recording the corresponding charging circuit of each key
Time, as the key standard comparison time.
Each key corresponding key standard comparison time is obtained by standard subelement 30, is mentioned for subsequent recognition by pressing keys
For accurate determinating reference.
The identification circuit working principle of key in the embodiment of the present invention:
It is no it is any press key pressing when, the port I/O of processing unit MCU is constantly in low level state；Work as key
A certain key is pressed in K1~Kn, and the I/O port level state overturning of processing unit MCU, triggering external interrupt enters interruption
Program, the key pressed corresponding RC circuit conducting, for the capacitor charging in the RC circuit, the trigger to signal waveform into
The timing subelement 10 of the port I/O of input processing unit MCU after row shaping, processing unit MCU starts timing, while at detection
Manage the I/O port level state of unit MCU；When the RC circuit charging complete corresponding to the key pressed, processing unit is detected
The I/O port level state of MCU is overturn again, and timing son Unit 10 stop timing, and record timing time；Comparison subunit 20
The timing time of record is made comparisons with the key standard comparison time in input system in advance, is taken immediate with timing time
Key corresponding to the standard comparison time determines which key is pressed key, completes key as the button value pressed
Identification；After key flicks, discharged by second resistance to corresponding capacitor, the port I/O of the processing unit MCU is restored at this time
Low level state.And the key standard comparison time is successively to press each key before detecting key, keeps each key corresponding
Charging circuit completes primary charging after connecting, successively record the corresponding charging circuit of each key by standard subelement 30 and complete
The charging time of charging, as the key standard comparison time.
Embodiment eight
As shown in fig. 7, the method includes walking as follows the embodiment of the invention also provides a kind of recognition methods of key
It is rapid:
S11, key conducting charging circuit to be identified is pressed, starts to charge charging circuit；
S12, record charging circuit complete the charging time of charging；
S13, charging time and the standard comparison time in input system in advance are compared, is taken closest with the charging time
The key standard comparison time corresponding to key as the button value pressed.
Specifically, when wherein moment to be identified by key pressing, the I/O port level state overturning of processing unit MCU,
Charging circuit corresponding to the key pressed starts to charge, and starts timing, while the I/O port level of detection processing unit MCU
State；When the charging circuit charging complete corresponding to the key to be identified pressed, the I/O port level state of processing unit MCU
It overturns again, stops timing, and record timing time.
In the embodiment, key conducting charging circuit to be identified is pressed, charging circuit is started to charge, records charging circuit
In the charging time for completing charging, charging time and the standard comparison time in input system in advance are compared, when taking with charging
Between key corresponding to the immediate key standard comparison time as the button value pressed, since each key is one corresponding
Charging circuit, and the capacitance of each capacitor is different, then the capacitor charging deadline is not also identical in each charging circuit, therefore only
The charging time for detecting the charging circuit of key conducting to be identified, that is, it can determine key to be identified, complete identification, and not
Charging time timing with charging circuit only needs a port I/O to be through the processing unit able to achieve, both through the processing unit
A port I/O complete the identification of key to be identified.
Embodiment nine
As shown in figure 8, the embodiment of the invention also provides a kind of recognition methods of key, the side provided by embodiment eight
On the basis of method, following steps are further comprised:
S10, when successively recording the corresponding charging circuit of each key and connecting, the charging time of charging is completed, as key
The standard comparison time.
In the embodiment, charged to corresponding charging circuit by pressing the realization of each key respectively and record each by
In the charging time of corresponding charging circuit, obtain each key corresponding key standard comparison time after key pressing, for below
Recognition by pressing keys accurate determinating reference is provided.
Embodiment ten
The embodiment of the present invention also provides a kind of blender, the identification circuit including key in any of the preceding embodiments.
In the embodiment, by using the identification circuit of key in any of the preceding embodiments as the key in blender
Identification circuit realizes that processing unit MCU controls the accurate identification of lower each key of blender, realizes the single end I/O processing unit MCU
Mouth realizes the identification of the more keys of blender.
In conclusion the identification circuit of key provided in an embodiment of the present invention, the capacitor in circuit is for charging, different electricity
Hold and feed back different timing times, convenient for identifying corresponding key.A port I/O of MCU can be completed through the processing unit
The recognition detection of multiple keys.It is discharged after the key being pressed flicks to corresponding capacitor by second resistance.By described
Trigger carries out the port I/O of input processing unit MCU after shaping to signal waveform, locates the port I/O of processing unit MCU only
In low level or high level two states.The port I/O of processing unit MCU uses the port external interrupt I/O, can be improved key
The real-time of identification circuit.The embodiment of the present invention also provides a kind of recognition methods of key, by being pressed in key to be identified
In the case where record charging circuit complete charging charging time, it is compared with the key standard comparison time, takes and fills
Key corresponding to the electric time immediate key standard comparison time is as recognition by pressing keys as a result, since each key is corresponding
One charging circuit, and the capacitance of each capacitor is different, then the capacitor charging deadline is not also identical in each charging circuit, because
If the timing subelement 10 of this processing unit MCU detects the charging time, then by comparison subunit 20 by the charging time with
The key standard comparison time compares, that is, can determine the key being pressed, and completes identification.Standard subelement 30 is by successively recording
When the corresponding charging circuit of each key is connected, the charging time for completing charging obtains each as the key standard comparison time
The key corresponding key standard comparison time, accurate determinating reference is provided for recognition by pressing keys.The embodiment of the present invention also provides one
Kind blender, by using the identification circuit of key described in aforementioned any embodiment as the identification of the key in blender electricity
Road realizes that processing unit MCU controls the accurate identification of lower each key of blender, realizes that the single port I/O processing unit MCU is real
The identification of the existing more keys of blender.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of recognition by pressing keys circuit, which is characterized in that the circuit includes:
The charging circuit being switched on when key to be identified is pressed；And
When the key to be identified is pressed, the charging time that charging circuit switched on completes charging is recorded, completes key
The processing unit of identification.
2. the identification circuit of key as described in claim 1, which is characterized in that the charging circuit uses RC circuit, specifically
Include:
One end connects out-put supply, and the other end connects the first resistor of the processing unit；
The charging capacitor of concatenated different capacitances is distinguished from first resistor；
Described key one end to be identified is connected on the connecting line between the processing unit and the first resistor, the charging
One end of capacitor is grounded, and the other end is connected to the key other end to be identified.
3. the identification circuit of key as claimed in claim 2, which is characterized in that the circuit further includes for being pressed
The key to be identified flick after be the electric discharge of corresponding charging capacitor second resistance.
4. the identification circuit of key as described in claim 1, which is characterized in that the circuit further includes making the processing unit
The port I/O be only in the trigger of low level or high level.
5. the identification circuit of key as claimed in claim 4, which is characterized in that the port I/O of the processing unit is outside
Interrupt the port I/O.
6. the identification circuit of key as described in any one in claim 1-5, which is characterized in that the processing unit includes:
Timing subelement, the charging time of the charging circuit charging complete for recording the key conducting to be identified；
Comparison subunit takes and fills for the charging time and the standard comparison time in input system in advance to compare
Key corresponding to the electric time immediate standard comparison time is as the button value pressed.
7. the identification circuit of key as claimed in claim 6, which is characterized in that the processing unit further include:
Standard subelement completes the charging time of charging when connecting for successively recording the corresponding charging circuit of each key, makees
For the key standard comparison time.
8. a kind of method using the described in any item recognition by pressing keys circuit key ranges of claim 1 to 7, which is characterized in that
Described method includes following steps:
Key conducting charging circuit to be identified is pressed, charging circuit is started to charge；
Record the charging time that the charging circuit completes charging；
The charging time and the standard comparison time in input system in advance are compared, take with the charging time it is immediate by
Key corresponding to the key standard comparison time is as the button value pressed.
9. the recognition methods of key as claimed in claim 8, which is characterized in that this method further includes following steps:
When successively recording the corresponding charging circuit of each key and connecting, the charging time of charging is completed, as key standard comparison
Time.
10. a kind of blender, which is characterized in that including recognition by pressing keys circuit as described in any one of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810764612.6A CN109038709B (en) | 2018-07-12 | 2018-07-12 | Key identification circuit and method and stirrer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810764612.6A CN109038709B (en) | 2018-07-12 | 2018-07-12 | Key identification circuit and method and stirrer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109038709A true CN109038709A (en) | 2018-12-18 |
| CN109038709B CN109038709B (en) | 2021-08-24 |
Family
ID=64642073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810764612.6A Active CN109038709B (en) | 2018-07-12 | 2018-07-12 | Key identification circuit and method and stirrer |
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| CN (1) | CN109038709B (en) |
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| CN109038709B (en) | 2021-08-24 |
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