CN101593049B

CN101593049B - Realizing method of scroll ball

Info

Publication number: CN101593049B
Application number: CN2008101001877A
Authority: CN
Inventors: 刘艳玲
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2008-05-28
Filing date: 2008-05-28
Publication date: 2012-02-29
Anticipated expiration: 2028-05-28
Also published as: CN101593049A

Abstract

The invention discloses a realizing method of a scroll ball, which comprises the following steps: obtaining the level change of GPIO after the XOR operation of the former-read GPIO value and current GPIO value of a universal input/output interface is executed; judging the current operation direction of the scroll ball according to the level change of GPIO. Being compatible with the structure of the prior hardware, the invention can avoid false triggering and overcome the adverse influence caused by the false triggering.

Description

A kind of implementation method of spin

Technical field

The present invention relates to the realization technology of spin, relate in particular to frequent and implementation method spin in the incident field that rule is few of a kind of built-in field and false triggering incident.

Background technology

Though spin is emerging product in embedded consumption electronic product, it is flexible and convenient to use fast, takes into account the two-fold advantage of mouse-keyboard, just more and more receives user's favor.Spin is made up of large ball games Ball and four bead Roller; In fact our spin of rolling at ordinary times is exactly at rolling Ball so; The Roller that when Ball rolls, drives on its direction rolls; And the rolling of Roller can trigger its corresponding Hall element generation pulse through general input/output interface GPIO, thereby in the register of relevant spin, can produce respective change.Here, the register of relevant spin, such as the GPIO register-bit in the spin controller.

Be connected synoptic diagram such as Fig. 1, shown in Figure 2 between existing spin, spin controller and the CPU.All comprise CPU1, spin controller 2 and spin 3 among Fig. 1, Fig. 2, the signal that spin passes to the spin controller all is that status signal is UP/DOWN/LEFT/RIGHT.The difference of Fig. 1 and Fig. 2 mainly is: the spin controller 2 of Fig. 1 is positioned at CPU1.That is to say that Fig. 1 is the situation that CPU supports the spin device, Fig. 2 is that CPU does not support the spin device, can only reach the situation that the spin device is supported through the outside expansion.With annexation shown in Figure 2 is example, and specifically, CPU1 provides clock signal to spin controller 2; CPU1 provides control signal to spin controller 2, is used to open the spin controller; Spin controller 2 provides look-at-me to CPU1, and after CPU1 receives this look-at-me, can call corresponding Interrupt Process function and remove to read the GPIO level that spin controller 2 transmits and change.Here, to change be to cause that the GPIO level that the Hall element induction produces changes because ball moves to the GPIO level that transmits of this spin controller 2.In addition, spin controller 2 is also to the input/output signal of CPU1 feedback user.Here, the status signal that only exists spin to roll between spin 3 and the spin controller 2 to be produced, this status signal are actually Hall element and produce pulse feedback and give spin controller 2.

Because spin in use; The pulse that triggers Hall element generation UP/DOWN/LEFT/RIGHT direction except meeting feeds back to the spin controller as status signal; Also often can unexpected touch the Hall element of other direction, thereby the waveform that triggers on other direction of spin forms false triggering.At present also can't be with the pulse elimination of false triggering from the angle of considering the improvement hardware configuration; Thereby can't solve the harmful effect that false triggering brings, such as the original spin of operation downwards, the result is because the false triggering waveform of other direction; Feasible generation left or to the right, even the pulse that makes progress.

Summary of the invention

In view of this, fundamental purpose of the present invention is to provide a kind of implementation method of spin, on the basis of compatible existing hardware structure, can avoid false triggering, overcomes the harmful effect that false triggering brings.

For achieving the above object, technical scheme of the present invention is achieved in that

A kind of implementation method of spin, this method comprises: after the last time general input/output interface GPIO value that will read was carried out xor operation with this GPIO value, the level that obtains GPIO changed; Level according to said GPIO changes the direction of operating of judging this spin; Wherein, said method further comprises any one in the following scheme:

Scheme one: the level of 5 GPIO of statistics changes the key assignments that sends spin, confirms that the key assignments of said spin is: the level that occurs GPIO during the level of said 5 GPIO changes changes the key assignments of the maximum direction of probability;

Scheme two: if meet level change frequency＞2 of GPIO and the pulse width＞reference point of said GPIO level during the level of said GPIO changes; And the level changing value of this GPIO is same GPIO value and the consistent condition of direction with the GPIO value of last time sending the spin direction, confirms that then the rotating direction of the rotating direction of this spin and spin last time is consistent;

Wherein, The said last time GPIO value that will read is carried out xor operation with this GPIO value and is specially: directly read and be connected the corresponding GPIO register of four Hall components and parts of spin; In said GPIO register, last time the value of the value of the GPIO register of record and this GPIO register was carried out xor operation.

Owing to spin false triggering when operating is frequent, and rule is not obvious, therefore at present also can't be with the pulse elimination of false triggering formation from the angle of considering the improvement hardware configuration.The present invention solves false triggering from the angle that software algorithm realizes.Specifically, after the last time general input/output interface GPIO value that the present invention will read was carried out xor operation with this GPIO value, the level that obtains GPIO changed; Level according to this GPIO changes the direction of operating of judging this spin.Adopt the present invention on the basis of compatible existing hardware structure, can avoid false triggering, overcome the harmful effect that false triggering brings.

And then the mode that adopts the rudimentary algorithm of realizing the spin function and the optimized Algorithm that solves the spin false triggering to mix is mutually avoided false triggering.Adopt the present invention on the basis of realizing spin function rudimentary algorithm, further optimize the realization of spin, avoid false triggering better.And the present invention also adopts the rudimentary algorithm of realizing the spin function, and solves the mode that the optimized Algorithm of spin sensitivity, accuracy and response speed is mixed mutually, improves sensitivity, accuracy and the response speed of spin.Employing the invention solves the response speed of spin and the contradiction of sensitivity and accuracy, can realize that spin responds fast, accurately and stably rolls.In addition; Adopt the rudimentary algorithm of realizing the spin function; Solve the optimized Algorithm of spin false triggering, and solve the mode that the optimized Algorithm of spin sensitivity, accuracy and response speed is mixed mutually, not only can avoid false triggering; But also can solve the response speed of spin and the contradiction of sensitivity and accuracy, realize that spin responds fast, accurately and stably rolls.

Description of drawings

Fig. 1 is connected synoptic diagram for one between existing spin, spin controller and the CPU;

Fig. 2 is connected synoptic diagram between existing spin, spin controller and the CPU another;

The schematic flow sheet that Fig. 3 realizes for the principle of the invention.

Embodiment

Core concept of the present invention is: after the last time general input/output interface GPIO value that the present invention will read was carried out xor operation with this GPIO value, the level that obtains GPIO changed; Level according to this GPIO changes the direction of operating of judging this spin.Adopt the present invention on the basis of compatible existing hardware and structure, can avoid false triggering, overcome the harmful effect that false triggering brings.

Below in conjunction with accompanying drawing the enforcement of technical scheme is done further to describe in detail.

As shown in Figure 3, a kind of implementation method of spin, this method may further comprise the steps:

After step 101, the last time GPIO value that will read and this GPIO value were carried out xor operation, the level that obtains GPIO changed.

Step 102, change the direction of operating of judging this spin according to the level of this GPIO.

Here,, further comprise in the above-mentioned steps 102: adopt from the counter register of spin and read out the direction and big or small mode that spin is rolled, revise the direction of operating of said spin in order to reach better effect.Make in this way and revise, can be so that the direction of operating of spin reduces the part mistake.

Wherein, In the above-mentioned steps 101; When hardware configuration adopts being connected between spin as shown in Figure 1, spin controller and the CPU; The said last time GPIO value that will read is carried out xor operation with this GPIO value and is specially: directly read and be connected the corresponding GPIO register of four Hall components and parts of spin, in said GPIO register, last time the value of the value of the GPIO register of record and this this GPIO register was carried out xor operation.Thereby the level that obtains GPIO according to this xor operation changes.Here, because the corresponding different UP/DOWN/LEFT/RIGHT operation of different GPIO can be judged among the GPIO according to the level variation of GPIO so, specifically which GPIO changes, thereby can judge the direction of operating of this spin.

Here, the implementation method that it is pointed out that spin described above all is to realize the rudimentary algorithm of spin function.Below the optimized Algorithm that realizes the spin function is set forth.

Optimized Algorithm one is: the optimized Algorithm that solves the spin false triggering.Because false triggering is frequent when operation, rule is not obvious for spin, also can't address this problem from the angle of considering hardware configuration, the present invention solves false triggering from the angle that software algorithm realizes, and statistical algorithms is adopted in the realization of software algorithm.Through checking; Adopt this optimized Algorithm; The level of promptly adding up 5 GPIO changes the key assignments that sends a spin, and the key assignments of definite spin of being sent is: during the level of said 5 GPIO changed, the level that GPIO occurs changed the key assignments of that maximum direction of probability.So, adopt the rudimentary algorithm of above-mentioned realization spin function, and solve the mode that the optimized Algorithm of spin false triggering is mixed mutually, on the basis of realizing spin function rudimentary algorithm, further optimize the realization of spin, avoid false triggering better.

Optimized Algorithm two is: the optimized Algorithm that solves spin sensitivity, accuracy and response speed.Adopt this optimized Algorithm, if promptly meet GPIO level change frequency＞2 and during the level of this GPIO changes the pulse width＞reference point of this GPIO level, such as 8ms; And the level of this this GPIO to change with that GPIO that last time sent the spin direction be same GPIO and the consistent condition of direction, then the rotating direction of the rotating direction of definite this spin and spin last time is consistent.Can let this moment receive the minimizing of spin rolling number of times, thereby increase the sensitivity and the speed of spin.That is to say, adopt to realize the rudimentary algorithm of spin function, and solve the mode that the optimized Algorithm of spin sensitivity, accuracy and response speed is mixed mutually, can improve sensitivity, accuracy and the response speed of spin.

Optimized Algorithm three is: also be the optimized Algorithm that solves spin sensitivity, accuracy and response speed.Adopt this optimized Algorithm, if promptly meet spin maximal value＞1; And the value of pulsewidth＞reference point and the previous transmission condition identical with this value, confirm that then the rotating direction of the rotating direction of this spin and spin last time is consistent.Can let this moment receive the minimizing of spin rolling number of times, thereby increase the sensitivity and the speed of spin.That is to say, adopt to realize the rudimentary algorithm of spin function, and solve the mode that the optimized Algorithm of spin sensitivity, accuracy and response speed is mixed mutually, can improve sensitivity, accuracy and the response speed of spin.

Optimized Algorithm four is: also be the optimized Algorithm that solves spin sensitivity, accuracy and response speed.Adopt this optimized Algorithm, if promptly meet level change frequency＞2 of GPIO; And preceding two transmissions is with value and the condition identical with this value, and the same value of what is called refers to that the key assignments of spin is identical here, confirms that then the rotating direction of the rotating direction of this spin and spin last time is consistent.Can let this moment receive the minimizing of spin rolling number of times, thereby increase the sensitivity and the speed of spin.That is to say, adopt to realize the rudimentary algorithm of spin function, and solve the mode that the optimized Algorithm of spin sensitivity, accuracy and response speed is mixed mutually, can improve sensitivity, accuracy and the response speed of spin.

Optimized Algorithm five is: also be the optimized Algorithm that solves spin sensitivity, accuracy and response speed.Adopt this optimized Algorithm, if i.e. 3s timer expiry, then confirm to receive finish after, jump out and receive circulation.Like this, can increase the speed of spin, on the transmission condition of spin, limit the accuracy that can guarantee spin simultaneously.That is to say, adopt to realize the rudimentary algorithm of spin function, and solve the mode that the optimized Algorithm of spin sensitivity, accuracy and response speed is mixed mutually, can improve sensitivity, accuracy and the response speed of spin.

Here; It is pointed out that the rudimentary algorithm that to realize the spin function, solve the optimized Algorithm of spin false triggering; And mix mutually with at least one algorithm in the optimized Algorithm of the sensitivity of above-mentioned solution spin, accuracy and response speed; Not only can avoid false triggering, but also can solve the response speed of spin and the contradiction of sensitivity and accuracy, realize that spin responds fast, accurately and stably rolls.For instance, can be with the rudimentary algorithm of realizing the spin function, optimized Algorithm one is mixed with the optimized Algorithm two-phase; With the rudimentary algorithm of realizing the spin function, optimized Algorithm one is mixed with the optimized Algorithm three-phase; With the rudimentary algorithm of realizing the spin function, optimized Algorithm one is mixed with optimized Algorithm four mutually; With the rudimentary algorithm of realizing the spin function, optimized Algorithm one is mixed with optimized Algorithm five mutually; With the rudimentary algorithm of realizing the spin function, optimized Algorithm one, optimized Algorithm two is mixed with the optimized Algorithm three-phase; With the rudimentary algorithm of realizing the spin function, optimized Algorithm one, optimized Algorithm two, optimized Algorithm three is mixed with optimized Algorithm four mutually; With the rudimentary algorithm of realizing the spin function, optimized Algorithm one, optimized Algorithm two, optimized Algorithm three, optimized Algorithm four is mixed with optimized Algorithm five mutually.

Method embodiment: do not changing on the existing hardware connection basis; Adopt the rudimentary algorithm of realization spin function and the mode that optimized Algorithm one, optimized Algorithm two, optimized Algorithm three, optimized Algorithm four and optimized Algorithm five are mixed mutually; Overcome the phenomenon that false triggering is frequent and rule is few, thereby realize quick, accurate, the stable rolling of spin.Above-mentioned optimized Algorithm is embodied in the spin reception and jumps out in the algorithm.Specifically, optimized Algorithm one corresponding spin receives and jumps out algorithm 1.; 2. optimized Algorithm two corresponding spin receive jumps out algorithm; 3. optimized Algorithm three corresponding spin receive jumps out algorithm; 4. optimized Algorithm four corresponding spin receive jumps out algorithm; 5. optimized Algorithm five corresponding spin receive jumps out algorithm.Below the concrete treatment scheme of present embodiment is set forth.

Here, to the initialization of spin, the initialization flow process of spin may further comprise the steps:

Step 201, define relevant GPIO of spin and the relevant control configuration that the spin controller is set in advance in advance; CPU is provided with the interruption of opening of spin GPIO.

Whether the spin interrupt function is registered in step 202, judgement successful, if success, then execution in step 203; Otherwise, finish the initialization flow process of current spin.

Step 203, give the spin allocation space, judge and distribute the whether success of spin event structure body space, if success, then execution in step 204; Otherwise, finish the initialization flow process of current spin.

(completion) incident is accomplished in step 204, establishment and initialization, synchronously the spin signal.

The kernel thread of step 205, establishment spin judges whether establishment spin kernel thread is successful, if success, then execution in step 206; Otherwise, finish the initialization flow process of current spin.

Step 206, wait completion synchronizing signal; Finish the initialization flow process of current spin.

Here; To the Interrupt Process of spin, the Interrupt Process flow process of spin comprises step: when look-at-me is come, check and judge whether to be the spin look-at-me; If; Signal then for the spin thread, carry out follow-up spin thread process flow process, otherwise do not carry out follow-up spin thread process flow process.

Here, to the spin thread process, the spin thread process comprises the thread initialization, the spin handling procedure that is made up of endless loop and the processing of withdrawing from thread.The spin thread process may further comprise the steps so:

Step 301, initialization timing device and semaphore.

Here, timer make spin can not long-play in endless loop, just jump out after the time arriving certain predetermined.With the 10ms timer is example, and spin is just jumped out after reaching 10ms.Semaphore is used to receive the signal of sending by interrupting.

The user's space of step 302, release spin thread makes this thread to run in the kernel spacing.

Step 303, reinitialize the thread space.

The signal mask lock of step 304, locking current task.

Signal (SIGKILL) unblock is killed in step 305, setting, recomputates the number of signals of suspension.

Two operations here all need the signal lock locking.

Step 306, wake the wait thread of spin up.

The spin handling procedure that step 307, entering are made up of endless loop.

Step 308, after receiving the SIGKILL signal, withdraw from the processing of thread.And, module discharges thread when withdrawing from the shared memory headroom of kernel.

Here, specifically, the processing of withdrawing from thread is: deletion 10ms timer, it is synchronous to withdraw from completion.Thereby finish the flow process of current spin thread process.

Here it is pointed out that the above-mentioned flow process that is made up of step 301～step 306 is the initialized flow process of thread.Above-mentioned steps 307 is the endless loop of spin and handles, and this is after thread starts initialization, the place that spin is handled.

Here, handle to the endless loop of spin, the endless loop treatment scheme of spin may further comprise the steps:

Step 401, enable spin and interrupt, to the 10ms regularly of initialized 10ms timer in the spin thread process module.

Step 402, wait for to receive the spin signal that the Interrupt Process function is sent, read in the signal of when receiving the spin signal, the arriving suspension formation, judge whether remain processing signals in the current task, if i.e. formation is not a sky, then execution in step 403; Otherwise,, then change execution in step 401 over to classifying sky as.

Step 403, shielding spin are interrupted, and 4ms is anti-shake in time-delay, through XOR last time the GPIO level change with this level that this GPIO level calculates each GPIO.

Step 404, timing 3s make spin after handling certain interruption number, can jump out endless loop, accelerate the speed of spin.

Step 405, time-delay 4ms, as in the step 403 through XOR last time GPIO level and this GPIO level this level of calculating each GPIO change, the level that recomputates each GPIO of spin changes, and each GPIO level of spin changes number and pulsewidth.

Step 406, change reference as the initial level of spin module with 5 statistical values; Obtain spin direction maximal value.

Step 407, the level of judging spin GPIO change and whether to satisfy spin and receive and jump out algorithm, if then execution in step 408; Otherwise, change execution in step 405 over to.

Here, be appreciated that also to: spin receives and jumps out algorithm according to whether meeting spin that deciding is to change the level that execution in step 405 continues to receive spin GPIO over to change, other that still continue down to carry out spin are handled operation.

Step 408, judge the level of spin GPIO changes whether to satisfy tilted direction rolling algorithm, if then preserve execution in step 409 behind the tilted direction of spin; Otherwise, direct execution in step 409.

Step 409, the level of judging spin GPIO change and whether to satisfy the spin key assignments and send the condition algorithm; If; Then preserve the transmission value direction that last time reached this spin; The key assignments of spin all directions is clear 0, change the key assignments that maximum directions is composed maximum direction, execution in step 410 for the level of spin GPIO; Otherwise, change execution in step 412 over to.

Step 410, judge whether spin time maximum direction exists, if, execution in step 411 after the assignment spin time maximum direction then; Otherwise, direct execution in step 411.

Step 411, send spin rolling key assignments and or the release key assignments of spin, the overtime sign of clear 0 timer 10ms.

Step 412, the current task state is set interrupts, dispatch execution in step 401 behind the overtime 30ms.

Below the algorithm that relates in the endless loop treatment scheme to above-mentioned spin set forth.

Receive to spin and to jump out algorithm, below each optimized Algorithm of being selected for use be relation arranged side by side.

1. this circulation is jumped out in the change frequency of the level of GPIO＞=5 o'clock, no longer receives each GPIO level of spin and changes, and changes other operation of carrying out spin into.This is the rudimentary algorithm that the reception of spin is jumped out, and other all are optimized Algorithm on this basis, to solve fast and the contradiction of accuracy, reach sensitive and accurate stable operating result.

2. when spin maximal value=1; And pulsewidth＞reference point; And preceding two transmissions is to be worth with value and with this can jump out this when identical and circulate other operation of execution spin.Spin maximal value=1st wherein in order to accelerate the speed of spin, if all adopt change frequency＞=5 o'clock of the level of GPIO at every turn, jumped out this round-robin condition and can be made that the spin reaction is slow after all.The condition of pulsewidth＞reference point is in order to guarantee the accuracy of spin.And preceding two transmissions is that same value and the condition identical with this value are accuracy and stability in order to guarantee spin.

3. when spin maximal value＞1; And the value of pulsewidth＞reference point and previous transmission is worth with this and can jumps out this circulation when identical, carries out other operation of spin.Spin maximal value＞1st wherein is in order to accelerate the speed of spin.And the value of pulsewidth＞reference point and previous transmission identical with this value be in order to guarantee the accuracy of spin.

4. level change frequency＞2 of GPIO; And preceding two transmissions is to be worth with value and with this can jump out this when identical and circulate other operation of execution spin.

5. can jump out this circulation when the 3s timer expiry, carry out other operation of spin.This condition is in order to accelerate the speed of spin.

Here, to tilted direction rolling algorithm, below each optimized Algorithm of being selected for use also be relation arranged side by side.

1. when spin maximal value＞2; And spin secondly maximal value and spin maximal value differ＜2 and level change frequency＞3 of GPIO o'clock think that the rolling of tilted direction has taken place spin.

2. when spin maximal value=5 and spin secondly maximal value and spin maximal value differ=think that also the rolling of tilted direction has taken place spin 2 the time.

Here, send the condition algorithm to the spin key assignments, below each optimized Algorithm of being selected for use also be relation arranged side by side.Be intended to increase accuracy, the stability of spin, and anti-shake when confirming by spin.

1. the change frequency of the level of GPIO＞=5 basic condition that still can send.

2. level change frequency＞2 of GPIO and surpass the regularly condition of 10ms, the 10ms timer in the corresponding spin handling procedure, i.e. step 308.

3. spin maximal value＞1; And the value of pulsewidth＞reference point and the previous transmission condition identical with this value, corresponding spin receives the 3rd step of jumping out algorithm, and promptly spin receives and jumps out algorithm 3..

4. spin maximal value=1; And pulsewidth＞reference point; And preceding two transmissions is with value and the condition identical with this value, and corresponding spin reception is jumped out the 2nd of algorithm and gone on foot, i.e. 2. spin reception jumps out algorithm.

The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.

Claims

1. the implementation method of a spin is characterized in that, this method comprises: after the last time general input/output interface GPIO value that will read was carried out xor operation with this GPIO value, the level that obtains GPIO changed; Level according to said GPIO changes the direction of operating of judging this spin; Wherein, said method further comprises any one in the following scheme:

Scheme one: the level of 5 GPIO of statistics changes, and sends the key assignments of a spin, confirms that the key assignments of said spin is: the level that occurs GPIO during the level of said 5 GPIO changes changes the key assignments of the maximum direction of probability;

Scheme two: if meet level change frequency＞2 of GPIO and the pulse width＞reference point of said GPIO level during the level of said GPIO changes; And the level changing value of this GPIO is same GPIO value and the consistent condition of direction with the GPIO value of last time sending the spin direction, confirms that then the rotating direction of the rotating direction of this spin and spin last time is consistent.

2. implementation method according to claim 1; It is characterized in that; The said last time GPIO value that will read is carried out xor operation with this GPIO value and is specially: directly read and be connected the corresponding GPIO register of four Hall components and parts of spin; In said GPIO register, last time the value of the value of the GPIO register of record and this GPIO register was carried out xor operation.