CN109286400A - A kind of button processing method of the delay based on timer and application - Google Patents
A kind of button processing method of the delay based on timer and application Download PDFInfo
- Publication number
- CN109286400A CN109286400A CN201811077435.0A CN201811077435A CN109286400A CN 109286400 A CN109286400 A CN 109286400A CN 201811077435 A CN201811077435 A CN 201811077435A CN 109286400 A CN109286400 A CN 109286400A
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- China
- Prior art keywords
- timer
- key
- timing
- flag bit
- clocked
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
-
- 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
Abstract
The invention belongs to keystroke handling technical fields, more particularly to a kind of button processing method of the delay based on timer, simultaneously, the present invention also provides a kind of keystroke handling applications of delay based on timer, key inspection: whether inquiry button is touched juxtaposition reset key flag bit, timer poll: inquiry button flag bit juxtaposition resets timing markers position and forms timing time, debounce processing: judge determine whether key is effective by timing time, the present invention solves the prior art and is substantially with a delay function delay for realizing 10-20ms there are existing software for jitters elimination, so as to cause a perhaps 20ms program loop due to there is the presence of keyboard delay judgement, it will lead to whole system operation all slow the problem of getting off, with real-time height, it is fast to execute speed, flexibility is high, response is timely beneficial to skill Art effect.
Description
Technical field
The invention belongs to keystroke handling technical field more particularly to a kind of keystroke handling sides of the delay based on timer
Method, meanwhile, the present invention also provides a kind of keystroke handling applications of delay based on timer.
Background technique
Key switch used is that mechanical elasticity switchs, when mechanical contact disconnection, closure, since the elasticity of mechanical contact is made
With switch will not be stably switched on or be disconnected at once.Thus in the moment for being closed and disconnecting always with a series of shake.
There are mainly two types of the methods of key Key dithering, and one is hardware circuit Key ditherings；Another kind is exactly software delay Key dithering.And prolong
When be generally divided into two kinds again, one is for circulation wait, another kind be timer delay.In an operating system, due to efficiency
The reason of aspect, does not allow generally to wait using for circulation, can only use timer, there are existing softwares to disappear for the prior art
Tremble the delay for being substantially with a delay function and realizing 10-20ms, so as to cause a perhaps 20ms program loop due to
The presence for having keyboard delay to judge will lead to whole system operation all slow the problem of getting off.
Summary of the invention
The present invention provides button processing method and the application of a kind of delay based on timer, to solve above-mentioned background technique
In propose the prior art and be substantially with a delay function delay for realizing 10-20ms there are existing software for jitters elimination, from
And lead to a perhaps 20ms program loop due to the presence that there is keyboard delay to judge, will lead to whole system operation it is all slow under
The problem come.
Technical problem solved by the invention is realized using following technical scheme: a kind of delay based on timer is pressed
Key processing method, comprising:
Key inspection: whether inquiry button is touched juxtaposition reset key flag bit；
Timer poll: inquiry button flag bit juxtaposition resets timing markers position and forms timing time；
Debounce processing: judge determine whether key is effective by timing time.
Further, it includes judging whether key touches that whether the inquiry button, which is touched juxtaposition reset key flag bit,
If key touches, set key flag bit, otherwise, then reset key flag bit；
It includes setting poll timing that the inquiry button flag bit juxtaposition, which resets timing markers position and forms timing time,
Device and clocked timer judge whether key flag bit is set in poll timer interruption, if key flag bit is set,
Then triggering timing timer and the accumulative timing variable formation timing time in clocked timer interruption, if key flag bit is answered
Position, then lock clocked timer and set timing complement mark；
If described judge to determine whether key effectively includes that timing complement mark is set by timing time, if timing
Time is greater than decision threshold, then key is effective, and otherwise key is invalid.
Further, the decision threshold is 20ms.
Further, the timing time is timing variable multiplied by timing time piece.
Further, the triggering timing timer includes starting triggering timing timer and set timing markers position, described
Locking clocked timer includes closing triggering timing timer and resetting timing markers position.
Further, if adding up timing variable in clocked timer interruption includes clocked timer generation interruption, if
Variations per hour is then fallen into a trap from 1 timing time piece is increased, if timing mark in clocked timer interrupt service routine in timing markers position position
Will position resets, then stops timing variable from increasing and lock.
Further, the minimum timeslice of the poll timer is 10ms, and the timing time piece of the clocked timer is
10ms。
Further, described to judge whether key touches including whether checking key using external interrupt mode or scanning mode
It touches, the scanning mode inspection includes timer inspection or program scanning inspection.
Further, whether the inspection key touches including judging whether the corresponding I/O port of key is pulled low, if key
Corresponding I/O port is pulled low, it is determined that key touches.
Meanwhile the present invention also provides a kind of keystroke handling applications of delay based on timer, comprising: keystroke handling mould
Block；
The keystroke handling module is used for:
Judge whether key touches, if key touches, set key flag bit, otherwise, then reset key flag bit；
Poll timer and clocked timer are set, judge whether key flag bit is set in poll timer interruption
Position, if flag bit is set, triggering timing timer and clocked timer interruption in add up timing variable formed timing when
Between, if key flag bit is reset, lock clocked timer；
If timing time is greater than decision threshold, key is effective, and otherwise key is invalid.
Advantageous effects:
1, this patent uses key inspection: whether inquiry button is touched juxtaposition reset key flag bit；Timer poll:
Inquiry button flag bit juxtaposition resets timing markers position and forms timing time；Debounce processing: judged by timing time true
Whether effective determine key, it includes judging whether key touches that whether the inquiry button, which is touched juxtaposition reset key flag bit,
If key touches, set key flag bit, otherwise, then reset key flag bit；The inquiry button flag bit juxtaposition resets
Timing markers position and formation timing time include setting poll timer and clocked timer, are sentenced in poll timer interruption
Whether disconnected key flag bit is set, if key flag bit is set, triggering timing timer and clocked timer interrupt
In add up timing variable and form timing time, if key flag bit is reset, locks clocked timer and set timing and complete
Mark；If described judge to determine whether key effectively includes that timing complement mark is set by timing time, if when timing
Between be greater than decision threshold, then key is effective, and otherwise key is invalid, due in practical application with three threads a kind of processing side
Method, this method includes checking whether there is key using external interrupt mode (or scanning mode) to be pressed, if so, one is marked
Will position position, indicates key pressing, tentatively defining this flag bit is keyflag, is interrupted if entered, keyflag=
1；Article 2 line: system should provide the timer of a 10ms, as the timeslice of system, detect whether in Interruption
Keyflag==1, if the flag bit is 1, then it represents that had been detected by key pressing, then started timing, timing variable-definition
For keytimes.It can be entered after statistic mixed-state to key with code if (key.flag==1) { key.times++ }
The number that 10ms timing interrupts；Article 3 line: key scanning processing, main program then mainly judge whether there is key and are pressed, press
Whether timing variable is greater than some value after lower (value determines that you tremble the time by disappearing for scenario justice), it can be seen that for such
Three lines handle the mode of keyboard, for the program that the needs such as keyboard program processing or the processing for showing flashing are largely delayed, all may be used
To use such structure, since its treatment process largely uses timer interruption to complete, Interruption only only takes up one
Then the slight period returns to main program and continues to execute, processing in this way greatly improves the real-time of system.
Judge to determine whether key effectively includes that timing complement mark is set by timing time if 2, this patent is used,
If then timing time is greater than decision threshold, key is effective, and otherwise key is invalid, and the decision threshold is 20ms, due to shake
Due to being put into Interruption, this time can be used to do other tasks the process of delay, greatly improve system
Real-time performance.
If 3, this patent includes that clocked timer generates interruption using timing variable is added up in clocked timer interruption,
If then timing markers position position, variations per hour is fallen into a trap from 1 timing time piece is increased, if meter in clocked timer interrupt service routine
When flag bit reset, then stop timing variable from increasing and locking, the minimum timeslice of the poll timer is 10ms, the meter
When timer timing time piece be 10ms, due to using mutation counter repeatedly add up form timing, relative to biography
The big timer of system, it is short with timeslice, execute fireballing feature.
4, this patent using it is described judge key whether touch including use external interrupt mode or scanning mode inspection by
Whether key touches, and the scanning mode inspection includes timer inspection or program scanning inspection, since the poll of key is using hard
Part is combined with software or hardware interrupts or software timing period, and application can provide according to hardware condition, the software of system
Source is freely selected, and has the characteristics that flexibility is high.
5, whether this patent is touched using the inspection key including judging whether the corresponding I/O port of key is pulled low, if
The corresponding I/O port of key is pulled low, it is determined that key touches, due to being carried out using I/O port interrupt mode, due to using in hardware
It is disconnected, have the characteristics that speed fastly and responds timely.
6, this patent provides a kind of keystroke handling application of delay based on timer simultaneously, to improve system operation
Practicability and stability.
Detailed description of the invention
Fig. 1 is a kind of general flow chart of the button processing method of the delay based on timer of the present invention；
Fig. 2 is a kind of specific flow chart of the button processing method of the delay based on timer of the present invention；
Fig. 3 is based on adding up during a kind of clocked timer by the button processing method of the delay of timer of the present invention interrupts
When flow chart.
Specific embodiment
The present invention is described further below in conjunction with attached drawing:
In figure: S101- key inspection；
S102- timer poll；
S103- debounce processing；
S201- judges whether key touches；
S202- key touches；
S203- set key flag bit；
S204- reset key flag bit；
Poll timer and clocked timer is arranged in S205-；
S206- judges whether key flag bit is set in poll timer interruption；
S207- key flag bit is set；
S208- triggering timing timer and the accumulative timing variable formation timing time in clocked timer interruption；
S209- locks clocked timer and set timing complement mark；
If S210- timing complement mark is set；
If S211- timing time is greater than decision threshold；
S212- key is effective；
S213- key is invalid；
If S301- clocked timer generates interruption；
If S302- timing markers position position；
S303- clocked timer interrupt service routine fall into a trap variations per hour from increase 1 timing time piece；
S304- stops timing variable from increasing and locks；
Embodiment:
The present embodiment: as shown in Figure 1, 2, a kind of button processing method of the delay based on timer, comprising:
Key checks S101: whether inquiry button is touched juxtaposition reset key flag bit S204；
Timer poll S102: inquiry button flag bit juxtaposition resets timing markers position and forms timing time；
Debounce processing S103: judge determine whether key is effective by timing time.
It includes judging whether key touches S201 that whether the inquiry button, which is touched juxtaposition reset key flag bit S204,
If key touches S202, set key flag bit S203, otherwise, then reset key flag bit S204；
It includes setting poll timing that the inquiry button flag bit juxtaposition, which resets timing markers position and forms timing time,
Device and clocked timer S205 judge whether key flag bit is set S206 in poll timer interruption, if pressing key flag
Position is set S207, then triggering timing timer and the accumulative timing variable formation timing time in clocked timer interruption
S208 locks clocked timer and set timing complement mark S209 if key flag bit is reset；
If described judge to determine whether key is effectively set S210 including timing complement mark by timing time, if
Timing time is greater than decision threshold S211, then the effective S212 of key, otherwise the invalid S213 of key.
Due to using key inspection: whether inquiry button is touched juxtaposition reset key flag bit；Timer poll: inquiry
Key flag bit juxtaposition resets timing markers position and forms timing time；Debounce processing: it is pressed by timing time judgement determination
Whether key is effective, and it includes judging whether key touches that whether the inquiry button, which is touched juxtaposition reset key flag bit, if pressing
Key touches, then set key flag bit, otherwise, then reset key flag bit；The inquiry button flag bit juxtaposition resets timing
Flag bit and formation timing time include setting poll timer and clocked timer, judge to press in poll timer interruption
Whether key flag position is set, if key flag bit is set, triggering timing timer and clocked timer interruption in tire out
Meter timing variable forms timing time and locks clocked timer and set timing complement mark if key flag bit is reset；
If described judge to determine whether key effectively includes that timing complement mark is set by timing time, if timing time is greater than
Decision threshold, then key is effective, and otherwise key is invalid, due to, with a kind of processing method of three threads, being somebody's turn to do in practical application
Method includes checking whether there is key using external interrupt mode (or scanning mode) to be pressed, if so, by a flag bit
Set indicates key pressing, tentatively defining this flag bit is keyflag, is interrupted if entered, keyflag=1；The
Two-lines: system should provide the timer of a 10ms, as the timeslice of system, detect whether in Interruption
Keyflag==1, if the flag bit is 1, then it represents that had been detected by key pressing, then started timing, timing variable-definition
For keytimes.It can be entered after statistic mixed-state to key with code if (key.flag==1) { key.times++ }
The number that 10ms timing interrupts；Article 3 line: key scanning processing, main program then mainly judge whether there is key and are pressed, press
Whether timing variable is greater than some value after lower (value determines that you tremble the time by disappearing for scenario justice), it can be seen that for such
Three lines handle the mode of keyboard, for the program that the needs such as keyboard program processing or the processing for showing flashing are largely delayed, all may be used
To use such structure, since its treatment process largely uses timer interruption to complete, Interruption only only takes up one
Then the slight period returns to main program and continues to execute, processing in this way greatly improves the real-time of system.
The decision threshold is 20ms.
Due to judging if whether determining key is effectively set including timing complement mark using by timing time, if
Timing time is greater than decision threshold, then key is effective, and otherwise key is invalid, and the decision threshold is 20ms, due to jitter time delay
Process due to being put into Interruption, this time can be used to do other tasks, greatly improve the reality of system
Shi Xingneng.
The timing time is timing variable multiplied by timing time piece.
The triggering timing timer includes starting triggering timing timer and set timing markers position, the locking timing
Timer includes closing triggering timing timer and resetting timing markers position.
As shown in figure 3, adding up timing variable in clocked timer interruption includes if that clocked timer generates interruption
S301 falls into a trap variations per hour from when increasing 1 timing in clocked timer interrupt service routine if then timing markers position position S302
Between piece S303, if timing markers position reset, stop timing variable from increase and locking S304.
If including clocked timer generation interruption due to adding up timing variable in interrupting using the clocked timer, if
Variations per hour is then fallen into a trap from 1 timing time piece is increased, if timing mark in clocked timer interrupt service routine in timing markers position position
Will position resets, then stops timing variable from increasing and locking, the minimum timeslice of the poll timer is 10ms, and the timing is fixed
When device timing time piece be 10ms, due to using mutation counter repeatedly add up form timing, relative to traditional
Big timer, it is short with timeslice, execute fireballing feature.
The minimum timeslice of the poll timer is 10ms, and the timing time piece of the clocked timer is 10ms.
It is described to judge whether key touches S201 includes checking whether key is light using external interrupt mode or scanning mode
Touching, the scanning mode inspection includes timer inspection or program scanning inspection.
Whether the inspection key touches including judging whether the corresponding I/O port of key is pulled low, if the corresponding IO of key
Port is pulled low, it is determined that key touches S202.
Due to judging whether key touches including checking that key is using external interrupt mode or scanning mode using described
No to touch, the scanning mode inspection includes timer inspection or program scanning inspection, due to key poll using hardware with
Software combines or hardware interrupts or software timing period, application can hardware condition, software resource according to system, from
By being selected, have the characteristics that flexibility is high.
A kind of keystroke handling application of the delay based on timer, comprising: keystroke handling module；
The keystroke handling module is used for:
Judge whether key touches S201, if key touches S202, otherwise set key flag bit S203 then resets
Key flag bit S204；
Poll timer and clocked timer S205 are set, judge in poll timer interruption key flag bit whether by
Set S206, if flag bit is set, triggering timing timer and clocked timer interruption in add up timing variable formed
Timing time S208 locks clocked timer if key flag bit is reset；
If timing time is greater than decision threshold S211, the effective S212 of key, otherwise the invalid S213 of key.
Meanwhile a kind of keystroke handling application of delay based on timer being provided, to improve the practical of system operation
Property and stability.
Working principle:
This patent passes through key inspection: whether inquiry button is touched juxtaposition reset key flag bit；Timer poll: it looks into
Key flag bit juxtaposition is ask to reset timing markers position and form timing time；Debounce processing: judge to determine by timing time
Whether key is effective, and whether the inquiry button is touched juxtaposition reset key flag bit including judging whether key touches, if
Key touches, then set key flag bit, otherwise, then reset key flag bit；The inquiry button flag bit juxtaposition resets meter
When flag bit and to form timing time include setting poll timer and clocked timer, judge in poll timer interruption
Whether key flag bit is set, if key flag bit is set, triggering timing timer and clocked timer interruption in
Accumulative timing variable forms timing time, if key flag bit is reset, locks clocked timer and mark is completed in set timing
Will；If described judge to determine whether key effectively includes that timing complement mark is set by timing time, if timing time
Greater than decision threshold, then key is effective, and otherwise key is invalid, due to having a kind of processing side of three threads in practical application
Method, this method includes checking whether there is key using external interrupt mode (or scanning mode) to be pressed, if so, one is marked
Will position position, indicates key pressing, tentatively defining this flag bit is keyflag, is interrupted if entered, keyflag=
1；Article 2 line: system should provide the timer of a 10ms, as the timeslice of system, detect whether in Interruption
Keyflag==1, if the flag bit is 1, then it represents that had been detected by key pressing, then started timing, timing variable-definition
For keytimes.It can be entered after statistic mixed-state to key with code if (key.flag==1) { key.times++ }
The number that 10ms timing interrupts；Article 3 line: key scanning processing, main program then mainly judge whether there is key and are pressed, press
Whether timing variable is greater than some value after lower (value determines that you tremble the time by disappearing for scenario justice), it can be seen that for such
Three lines handle the mode of keyboard, for the program that the needs such as keyboard program processing or the processing for showing flashing are largely delayed, all may be used
To use such structure, since its treatment process largely uses timer interruption to complete, Interruption only only takes up one
Then the slight period returns to main program and continues to execute, the present invention solves the prior art there are existing software for jitters elimination substantially
It is the delay that 10-20ms is realized with a delay function, so as to cause a perhaps 20ms program loop due to there is keyboard to prolong
When the presence that judges, will lead to the problem of whole system operation is all slow to get off, have that real-time is high, it is fast to execute speed, flexibly
Property high, response timely advantageous effects.
Using technical solution of the present invention or those skilled in the art under the inspiration of technical solution of the present invention, design
Similar technical solution out, and reach above-mentioned technical effect, it is to fall into protection scope of the present invention.
Claims (10)
1. a kind of button processing method of the delay based on timer characterized by comprising
Key inspection: whether inquiry button is touched juxtaposition reset key flag bit；
Timer poll: inquiry button flag bit juxtaposition resets timing markers position and forms timing time；
Debounce processing: judge determine whether key is effective by timing time.
2. a kind of button processing method of delay based on timer according to claim 1, which is characterized in that described to look into
Asking key and whether being touched juxtaposition reset key flag bit includes judging whether key touches, if key touches, set key
Flag bit, otherwise, then reset key flag bit；
The inquiry button flag bit juxtaposition reset timing markers position and formed timing time include setting poll timer and
Clocked timer judges whether key flag bit is set in poll timer interruption, if key flag bit is set, touches
It sends out clocked timer and adds up timing variable in clocked timer interruption and form timing time, if key flag bit is reset,
Then lock clocked timer and set timing complement mark；
If described judge to determine whether key effectively includes that timing complement mark is set by timing time, if timing time
Greater than decision threshold, then key is effective, and otherwise key is invalid.
3. a kind of button processing method of delay based on timer according to claim 2, which is characterized in that described to sentence
Determining threshold value is 20ms.
4. a kind of button processing method of delay based on timer according to claim 2, which is characterized in that the meter
When the time be timing variable multiplied by timing time piece.
5. a kind of button processing method of delay based on timer according to claim 2, which is characterized in that the touching
Sending out clocked timer includes starting triggering timing timer and set timing markers position, and the locking clocked timer includes closing
Triggering timing timer and reset timing markers position.
6. a kind of button processing method of delay based on timer according to claim 2, which is characterized in that the meter
If when timer interruption in add up timing variable include clocked timer generate interruption, if timing markers position position, counting
When timer interrupt service program fall into a trap variations per hour from increase 1 timing time piece, if timing markers position reset, stop timing change
Amount is from increasing and locks.
7. a kind of button processing method of delay based on timer according to claim 2, which is characterized in that the wheel
The minimum timeslice for asking timer is 10ms, and the timing time piece of the clocked timer is 10ms.
8. a kind of button processing method of delay based on timer according to claim 2, which is characterized in that described to sentence
Whether disconnected key touches the scanning mode inspection including checking whether key touches using external interrupt mode or scanning mode
Including timer inspection or program scanning inspection.
9. a kind of button processing method of delay based on timer according to claim 2, which is characterized in that the inspection
Look into whether key touches including judging whether the corresponding I/O port of key is pulled low, if the corresponding I/O port of key is pulled low,
Determine that key touches.
10. a kind of keystroke handling application of the delay based on timer characterized by comprising keystroke handling module；
The keystroke handling module is used for:
Judge whether key touches, if key touches, set key flag bit, otherwise, then reset key flag bit；
Poll timer and clocked timer are set, judge whether key flag bit is set in poll timer interruption, if
Flag bit is set, then triggering timing timer and the accumulative timing variable formation timing time in clocked timer interruption, if
Key flag bit is reset, then locks clocked timer；
If timing time is greater than decision threshold, key is effective, and otherwise key is invalid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811077435.0A CN109286400A (en) | 2018-09-15 | 2018-09-15 | A kind of button processing method of the delay based on timer and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811077435.0A CN109286400A (en) | 2018-09-15 | 2018-09-15 | A kind of button processing method of the delay based on timer and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109286400A true CN109286400A (en) | 2019-01-29 |
Family
ID=65180785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811077435.0A Withdrawn CN109286400A (en) | 2018-09-15 | 2018-09-15 | A kind of button processing method of the delay based on timer and application |
Country Status (1)
| Country | Link |
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| CN (1) | CN109286400A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086457A (en) * | 2019-03-18 | 2019-08-02 | 南京御弟哥哥电气有限公司 | It is a kind of for mechanical key stabilization and the processing method of obstruction |
-
2018
- 2018-09-15 CN CN201811077435.0A patent/CN109286400A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086457A (en) * | 2019-03-18 | 2019-08-02 | 南京御弟哥哥电气有限公司 | It is a kind of for mechanical key stabilization and the processing method of obstruction |
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Application publication date: 20190129 |
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