CN106646212A - Multi-button detection device and detection method - Google Patents
Multi-button detection device and detection method Download PDFInfo
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- CN106646212A CN106646212A CN201611148192.6A CN201611148192A CN106646212A CN 106646212 A CN106646212 A CN 106646212A CN 201611148192 A CN201611148192 A CN 201611148192A CN 106646212 A CN106646212 A CN 106646212A
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- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 238000012360 testing method Methods 0.000 claims abstract description 71
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
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- General Physics & Mathematics (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
The invention relates to a multi-button detection device and a detection method; a controller uses each test port to respectively output high level to buttons of the corresponding line, controls each acquisition port to be grounded through a corresponding inner pull down resistor and in a pull down state, and detects column signals outputted by buttons of the corresponding column and received by the acquisition ports; the controller detects the column signals to be greater than 0 voltage, keeps the acquisition ports with column signal greater than 0 voltage to be in the pull down state, controls test ports to output high level line by line, respectively detects column signals outputted by the buttons of the corresponding column and received by the pull down acquisition ports again, and obtains a button detection result according to the repeatedly received column signals. The method and device can combine tests port with acquisition ports so as to scan the button module; the controller can control the corresponding acquisition ports to be in the pull down state when column signals are received, thus preventing conflictions formed by simultaneously triggering buttons of different columns from affecting the signal detection, preventing mal-trigger phenomenon, and reducing detection cost.
Description
Technical field
The present invention relates to button detection technique field, more particularly to a kind of many key detection devices and detection method.
Background technology
With making rapid progress for science and technology, push-button input device is widely used in electronic product.Common button detection
Mode has three kinds：Independent triggers button, scanning button and A/D buttons.Each button of Independent keys takes an I/O moneys
Source, the more application scenario of number of keys is too high to the I/O resource requirements of controller.Scanning button and A/D buttons using compared with
Few I/O Resource Designs go out the more application circuit of number of keys, however, all there is button conflict in both approaches, i.e., it is multiple
Button is pressed simultaneously when, it may appear that false triggering phenomenon.
In order to avoid false triggering phenomenon, traditional many key detecting methods are connected on each button of scanning button
One diode, using the unidirectional general character of diode many buttons triggering conflict of scanning button is solved.It is a large amount of due to needing
Using diode, traditional many key detecting methods have the shortcomings that testing cost is high.
The content of the invention
Based on this, it is necessary to for the problems referred to above, there is provided a kind of low many key detection devices of testing cost and detection side
Method.
A kind of many key detection devices, including controller and internal pull down resistor, the controller includes multiple test leads
Mouth and multiple collection ports, the test port of the controller is used to connect respectively with the button of a line in key-press module, described
The collection port interior part of controller is not provided with described in one internal pull down resistor, and for connecting the key-press module respectively in
The button of same row,
The controller exports respectively the button of high level to correspondence row by each test port, controls the collection
Port is in pull-down state by corresponding internal pull down resistor ground connection, and detects the respective column that the collection port receives
The column signal of button output；The controller keeps column signal adopting more than 0 volt when column signal is detected the presence of more than 0 volt
Collection port is in pull-down state, controls the test port and exports high level line by line, respectively collection of the detection in pull-down state
The column signal of the button output of the respective column that port receives again, and button detection knot is obtained according to the column signal for receiving again
Really.
A kind of many key detecting methods, comprise the following steps：
Controller exports respectively the button of high level to correspondence row by each test port, and control collection port is by right
The inside pull down resistor ground connection answered detects the row of the button output of the respective column that the collection port receives in pull-down state
Signal；
The controller keeps collection port of the column signal more than 0 volt to be in when column signal is detected the presence of more than 0 volt
Pull-down state；
The controller controls the test port and exports high level line by line, respectively collection terminal of the detection in pull-down state
The column signal of the button output of the respective column that mouth is received again, and button detection knot is obtained according to the column signal for receiving again
Really.
Above-mentioned many key detection devices and detection method, controller exports respectively high level to correspondence by each test port
Capable button, control collection port is in pull-down state by corresponding internal pull down resistor ground connection, and detects collection port
The column signal of the button output of the respective column of reception.Controller keeps column signal big when column signal is detected the presence of more than 0 volt
Pull-down state is in 0 volt of collection port, control test port exports line by line high level, and respectively detection is in pull-down state
The column signal of the button output of the respective column that collection port receives again, and button inspection is obtained according to the column signal for receiving again
Survey result.Binding test port and collection port are scanned to key-press module, controller control correspondence when column signal is received
Collection port be in pull-down state, it is to avoid the button of different lines clashes when triggering simultaneously and signal detection is interfered,
Avoid reducing testing cost while false triggering phenomenon.
Description of the drawings
Fig. 1 is the structure chart of many key detection devices in an embodiment；
Fig. 2 is the principle schematic that the row button of two row any to key-press module two is detected in an embodiment；
Fig. 3 is the equivalent schematic that the row button of two row any to key-press module two is detected in an embodiment；
Fig. 4 is the flow chart of many key detecting methods in an embodiment.
Specific embodiment
In one embodiment, a kind of many key detection devices, it is adaptable to the electronic product of the type such as electronic musical instrument.As schemed
Shown in 1, the device includes controller 110 and internal pull down resistor, and controller 110 includes multiple test ports and multiple collection terminals
Mouthful, the test port of controller 110 is used to connect respectively in key-press module 200 with the button of a line, the collection terminal of controller 110
It is mouthful internal to be respectively arranged with an inside pull down resistor, and for connecting key-press module 200 respectively in same row button.
Key-press module 200 is m rows × n row (m and n is positive integer) matrix-scanning button, wherein, button S (m, n) is button
The button of the row of m rows n-th in module 200, equal one end of each button connects corresponding test port, and other end connection is corresponding to adopt
Collection port.The particular type of test port and collection port is not unique, and in the present embodiment, test port is I/O (input/
Output, input/output) port, collection port is A/D (Analog to Digital, analog quantity to digital quantity is changed) end
Mouthful.I/O ports can export the high/low logic level of high/low (1/0) logic level and identification outside input, and A/D ports are used for
Collection and the analog voltage signal of identification outside input.The row signal of key-press module 200 is connected to the I/O ports of controller 110,
Column signal is connected to the A/D ports of controller 110, and inspection is scanned to key-press module 200 with reference to I/O ports by A/D ports
Survey.
Specifically, I/O ports include port I/O1, port I/O2 ..., port I/Om, A/D ports include port AD1, end
Mouthful AD2 ..., port ADn.Each I/O port connects respectively button of the correspondence with a line, and each A/D port connects respectively correspondence
The button of same row.For example, port I/O1 connection key-press module 200 in the 1st row button S (1,1), button S (1,2) ..., press
Key S (1, n), port AD1 connection key-press module 200 in the 1st row button S (1,1), button S (2,1) ..., button S (m, 1).
The reason for producing conflict to matrix keyboard is analyzed, and the row of two row two are arbitrarily selected from matrix press-key circuit.Lift
Example explanation, HA and HB is any two row signal, and Va and Vb is any two column signal, and button 1 and button 2 connect with row signal HA
Connect, button 3 and button 4 are connected with row signal HB, and key 1 and button 3 are connected with column signal Va, button 2 and button 4 and column signal Vb
Connection.When wherein any 3 buttons are pressed simultaneously, conflict can be caused.For example button 1, button 2, button 3 are concurrently depressed,
Now, row signal HB and column signal Vb signals are joined together by the conducting effect of button, and row signal HB and column signal
Vb signal short circuits are equivalent to 4 buttons and are pressed, therefore, button controller cannot correctly judge 4 state.
With continued reference to Fig. 1, controller 110 exports respectively the button of high level to correspondence row, control by each test port
Collection port is in pull-down state by corresponding internal pull down resistor ground connection, and detects the respective column that collection port receives
The column signal of button output.Controller 110 keeps collection of the column signal more than 0 volt when column signal is detected the presence of more than 0 volt
Port be in pull-down state, control test port export high level line by line, respectively detection in pull-down state collection port again
The column signal of the button output of the respective column of secondary reception, and button testing result is obtained according to the column signal for receiving again.
Controller 110 controls all test port output high level, and controls all collection ports in pull-down state, adopts
Collection button voltage.If detecting column signal that collection port receives when having the voltage more than 0 volt, column signal (row are illustrated
Or multiple row) to there is button to press.Collection port of the control column signal of controller 110 more than 0 volt keeps pull-down state, controls
Test port processed exports line by line high level and gathers button voltage again.High level is exported line by line accuses that row signal processed exports line by line height
Level 1, i.e., only have in order each time a line output high level 1, other row signal output low levels 0.Controller 110 is now examined
Survey the column signal that the collection port in pull-down state receives and whether be more than 0 volt, if so, then illustrate the corresponding button of the row row
It is pressed, until scanning through all of row, completes one-touch detection process, obtains button testing result.Controller 110 can root
Corresponding operation is performed according to button testing result.
In one embodiment, many key detection devices also include internal pull-up resistor, in the test port of controller 110
Portion is respectively arranged with an inside pull down resistor and an internal pull-up resistor, and test port is being connect by corresponding internal pull-up resistor
High level is exported when entering power supply, when being grounded by corresponding internal pull down resistor low level is exported.Controller 110 can be according to need
Change test port and internal pull down resistor and the annexation of internal pull-up resistor, export so as to control test port correspondence
High level and low level.
Specifically, in one embodiment, controller 110 includes control circuit, test port on-off circuit and collection terminal
Mouth on-off circuit, the quantity of test port on-off circuit is identical with the quantity of test port, gathers the quantity of port switching circuits
It is identical with the quantity of collection port.Control circuit connecting test port switching circuits and collection port switching circuits, test port
On-off circuit connects corresponding test port, and is grounded by corresponding internal pull down resistor, and by corresponding inside
Pull-up resistor connects power access end.Collection port switching circuits connect corresponding collection port, and drop-down by corresponding inside
Resistance eutral grounding.
Control circuit changes test port with internal pull down resistor and internal pull-up resistor by test port on-off circuit
Annexation, when test port on-off circuit is connected internal pull-up resistor with test port, the high electricity of test port output
Flat, when test port on-off circuit is connected internal pull down resistor with test port, test port output low level completes row
The output control of signal.When needing to gather column signal, control circuit is by gathering port switching circuits by internal pull down resistor
It is connected with collection port, it is to avoid the button of different lines is clashed when triggering simultaneously.
Additionally, the collection port interior part of controller 110 is not provided with an internal pull-up resistor, port switching circuits are gathered
Power access end is connected by corresponding internal pull-up resistor.When column signal need not be gathered, can be by gathering port switch
Circuit is connected internal pull-up resistor with collection port.
In one embodiment, many key detection devices also include current-limiting resistance, the quantity and key-press module of current-limiting resistance
Number of keys it is identical, each current-limiting resistance respectively with a corresponding button connect.
It is concrete as shown in figure 1, current-limiting resistance include resistance R (1,1), resistance R (1,2) ..., resistance R (m, n).With current limliting
As a example by resistance R (m, n), current-limiting resistance R (m, n) is connected with button S (m, n), current-limiting resistance R (m, n) other end connectivity port I/
Om, button S (m, n) other end connectivity port ADn.By a current-limiting resistance of connecting to each button in key-press module 200,
When a button is pressed, when correspondence row signal output is high level 1, by series resistance and corresponding column signal in controller 110
The inside pull down resistor of A/D ports form partial pressure, the A/D ports will collect the voltage more than 0 volt, it is determined that be pressed by
Key.
As shown in Fig. 2 the row button of two row two includes button S1, button S2, button S3 and button S4, difference series resistance
R1, resistance R2, resistance R3 and resistance R4, the corresponding test port of the row button of two row two includes port I/OA and port I/OB, adopts
Collection port includes port ADa and port ADb.Port Ada is provided with corresponding pull down resistor RΛda, port ADb is provided with corresponding
Pull down resistor RΛdb.When wherein any 3 buttons are pressed, such as button S1, button S2, button S3 are concurrently depressed, now
Equivalent circuit is as shown in figure 3, the state of detection button S4：The port I/OB output high level 1 of controller 110, remaining I/O (bag
Include I/OA) port output low level 0, the magnitude of voltage of port ADb is detected, if button S4 is not pressed, the sampling electricity of port ADb
Pressure is equal to 0 volt；If button S4 is pressed, sampled voltage is lied prostrate more than 0V, can correctly judge the state of button S4.Thus say
Bright, above-mentioned many key detection devices can effectively solve the problem that many buttons while collision problem when pressing.
In one embodiment, many key detection devices also include the electric supply installation of connection controller 110.Electric supply installation is used
In powering to controller 110.
Further, electric supply installation includes battery and mu balanced circuit, battery connection mu balanced circuit, mu balanced circuit connection control
Device 110.Mu balanced circuit carries out exporting after voltage stabilizing process to controller 110 to the voltage that battery is exported, and improves power supply reliability.
Above-mentioned many key detection devices, binding test port and collection port are scanned to key-press module, and controller exists
Corresponding collection port is controlled when receiving column signal in pull-down state, it is to avoid the button of different lines is clashed when triggering simultaneously
Signal detection is interfered, it is to avoid reduce testing cost while false triggering phenomenon.
In one embodiment, a kind of many key detecting methods, are realized, it is adaptable to electricity based on above-mentioned many key detection devices
The electronic product of the types such as sub- musical instrument.As shown in figure 4, the method is comprised the following steps：
Step S110：Controller exports respectively the button of high level to correspondence row by each test port, controls collection terminal
Mouth is in pull-down state by corresponding internal pull down resistor ground connection, and detects that the button of the respective column that collection port receives is defeated
The column signal for going out.
Controller controls all test ports and exports high level, and controls all collection ports in pull-down state, collection
Button voltage.
Step S120：Controller keeps collection terminal of the column signal more than 0 volt when column signal is detected the presence of more than 0 volt
Mouth is in pull-down state.
If detecting column signal that collection port receives when having the voltage more than 0 volt, column signal (row or many are illustrated
Row) to there is button to press.Collection port of the controller control column signal more than 0 volt keeps pull-down state.
Step S130：Controller control test port exports line by line high level, respectively collection of the detection in pull-down state
The column signal of the button output of the respective column that port receives again, and button detection knot is obtained according to the column signal for receiving again
Really.
Controller control test port exports line by line high level and gathers button voltage again.High level is exported line by line accuses system
Row signal exports line by line high level 1, i.e., there was only a line output high level 1, other row signal output low levels in order each time
0.Controller 110 now detects whether the column signal that the collection port in pull-down state receives is more than 0 volt, if so, then illustrates
The corresponding button of the row row is pressed.Until scanning through all of row, one-touch detection process is completed, obtain button detection
As a result.Controller can perform corresponding operation according to button testing result.
Above-mentioned many key detecting methods, binding test port and collection port are scanned to key-press module, and controller exists
Corresponding collection port is controlled when receiving column signal in pull-down state, it is to avoid the button of different lines is clashed when triggering simultaneously
Signal detection is interfered, it is to avoid reduce testing cost while false triggering phenomenon.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but and
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that for one of ordinary skill in the art comes
Say, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of many key detection devices, it is characterised in that including controller and internal pull down resistor, the controller includes many
Individual test port and multiple collection ports, the test port of the controller is used to connect pressing with a line in key-press module respectively
Key, the collection port interior part of the controller is not provided with internal pull down resistor described in, and for connecting described pressing respectively
The button of same row in key module,
The controller exports respectively the button of high level to correspondence row by each test port, controls the collection port
Pull-down state is in by corresponding internal pull down resistor ground connection, and detects the button of the respective column that the collection port receives
The column signal of output；The controller keeps collection terminal of the column signal more than 0 volt when column signal is detected the presence of more than 0 volt
Mouth is in pull-down state, controls the test port and exports high level line by line, respectively collection port of the detection in pull-down state
The column signal of the button output of the respective column for receiving again, and button testing result is obtained according to the column signal for receiving again.
2. many key detection devices according to claim 1, it is characterised in that also including internal pull-up resistor, the control
Internal pull-up resistor described in internal pull down resistor and described in, the test lead are respectively arranged with inside the test port of device processed
Mouth exports high level when power supply is accessed by corresponding internal pull-up resistor, when being grounded by corresponding internal pull down resistor
Output low level.
3. many key detection devices according to claim 2, it is characterised in that the controller includes control circuit, surveys
Examination port switching circuits and collection port switching circuits, the quantity of the test port on-off circuit and the number of the test port
Amount is identical, and the quantity of the collection port switching circuits is identical with the quantity of the collection port,
The control circuit connects the test port on-off circuit and the collection port switching circuits, and the test port is opened
Powered-down road connects corresponding test port, and is grounded by corresponding internal pull down resistor, and by corresponding internal pull-up
Resistance connects power access end；The collection port switching circuits connect corresponding collection port, and by corresponding interior subordinate
Pull-up resistor is grounded.
4. many key detection devices according to claim 3, it is characterised in that the collection port interior part of the controller
Internal pull-up resistor described in one is not provided with, the collection port switching circuits connect power supply by corresponding internal pull-up resistor
Incoming end.
5. many key detection devices according to claim 1, it is characterised in that also including current-limiting resistance, the current limliting electricity
The quantity of resistance is identical with the number of keys of the key-press module, and each current-limiting resistance is connected respectively with a corresponding button.
6. many key detection devices according to claim 1, it is characterised in that the test port is I/O ports.
7. many key detection devices according to claim 1, it is characterised in that the collection port is A/D ports.
8. many key detection devices according to claim 1, it is characterised in that also including the power supply for connecting the controller
Device.
9. many key detection devices according to claim 8, it is characterised in that the electric supply installation includes battery and voltage stabilizing
Circuit, the battery connects the mu balanced circuit, and the mu balanced circuit connects the controller.
10. a kind of many key detecting methods, it is characterised in that comprise the following steps：
Controller exports respectively the button of high level to correspondence row by each test port, and control collection port is by corresponding
Internal pull down resistor ground connection is in pull-down state, and detects the row letter of the button output of the respective column that the collection port receives
Number；
The controller keeps collection port of the column signal more than 0 volt in drop-down when column signal is detected the presence of more than 0 volt
State；
The controller controls the test port and exports high level line by line, and respectively collection port of the detection in pull-down state be again
The column signal of the button output of the respective column of secondary reception, and button testing result is obtained according to the column signal for receiving again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611148192.6A CN106646212A (en) | 2016-12-13 | 2016-12-13 | Multi-button detection device and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611148192.6A CN106646212A (en) | 2016-12-13 | 2016-12-13 | Multi-button detection device and detection method |
Publications (1)
| Publication Number | Publication Date |
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| CN106646212A true CN106646212A (en) | 2017-05-10 |
Family
ID=58825139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611148192.6A Pending CN106646212A (en) | 2016-12-13 | 2016-12-13 | Multi-button detection device and detection method |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110109788A (en) * | 2019-04-30 | 2019-08-09 | 惠州Tcl移动通信有限公司 | More key detecting methods, device, electronic equipment and storage medium |
| CN112666454A (en) * | 2020-11-27 | 2021-04-16 | 深圳市创荣发电子有限公司 | Remote controller test method, device and storage medium |
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| US5543786A (en) * | 1994-10-18 | 1996-08-06 | United Microelectronics Corp. | Keyboard scanning circuit |
| CN102088502A (en) * | 2011-01-26 | 2011-06-08 | 惠州Tcl移动通信有限公司 | Full-keyboard extended circuit for mobile phone and key scanning method of expanded circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110109788A (en) * | 2019-04-30 | 2019-08-09 | 惠州Tcl移动通信有限公司 | More key detecting methods, device, electronic equipment and storage medium |
| CN110109788B (en) * | 2019-04-30 | 2023-11-10 | 惠州Tcl移动通信有限公司 | Multi-key detection method and device, electronic equipment and storage medium |
| CN112666454A (en) * | 2020-11-27 | 2021-04-16 | 深圳市创荣发电子有限公司 | Remote controller test method, device and storage medium |
| CN112666454B (en) * | 2020-11-27 | 2024-02-20 | 深圳市创荣发电子有限公司 | Remote controller testing method, device and storage medium |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 519000 No. 333, Kexing Road, Xiangzhou District, Zhuhai City, Guangdong Province Applicant after: ZHUHAI JIELI TECHNOLOGY Co.,Ltd. Address before: Floor 1-107, building 904, ShiJiHua Road, Zhuhai City, Guangdong Province Applicant before: ZHUHAI JIELI TECHNOLOGY Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170510 |