CN107290991B - Encoder knob control method and equipment based on Vehicle Controller - Google Patents
Encoder knob control method and equipment based on Vehicle Controller Download PDFInfo
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- CN107290991B CN107290991B CN201710387573.8A CN201710387573A CN107290991B CN 107290991 B CN107290991 B CN 107290991B CN 201710387573 A CN201710387573 A CN 201710387573A CN 107290991 B CN107290991 B CN 107290991B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- Automation & Control Theory (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
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Abstract
The present invention discloses a kind of encoder knob control method based on Vehicle Controller, comprising: initialization encoder port A, B, C are arranged the first Interruption and the second Interruption, configure an external interrupt for port A；It acquires the port level of port A and confirms that encoder knob rotates and closes external interrupt when port level state variable meets the external interrupt condition and open the first Interruption；It acquires each encoder port level and obtains port level state variable, the direction of rotation of encoder knob is confirmed when the port level state variable meets the second Interruption condition；The first Interruption and the second Interruption are closed, external interrupt is opened, by port level state variable clear 0.The present invention is combined by external interrupt and Interruption, and entire encoder rotation identification identification all in interrupt function guarantees the correctness of rotation identification, also evaded erroneous judgement problem when cyclic polling in task without being interrupted by other systems task.
Description
Technical field
The present invention relates to automotive electronics field of embedded technology more particularly to a kind of encoder rotations based on Vehicle Controller
Button control method and equipment.
Background technique
Automobile center console generally has multiple encoder knobs, facilitates driver and adjusts electronic equipment by rotating, such as
The volume adjustment of vehicle entertainment system, the frequency point of radio are adjusted, adjusted there are also the temperature of air-conditioner controller, air quantity etc..At present
Encoder knob control method is all by inquiring multiple port low and high level states, according to the sequencing of port low and high level
Rule judge that encoder is clockwise or counterclockwise.In order to prevent erroneous judgement or without response the problems such as, this requires place
Reason device fast cycle inquires the state of multiple port levels, and common way is that multiple ports are inquired in the timing of about 1 millisecond period
The state change of level.But this is for a busy system, as long as the other task maximums of system, which execute the period, is greater than 1 millisecond,
The system of will lead to cannot according to the state of the cyclic polling encoder port of regulation, cause erroneous judgement or without response the problems such as.And
And the inquiry of every millisecond of encoder port also increases the resource utilization of processor, influences the stability of the other functions of system.
Summary of the invention
It is an object of the present invention to propose a kind of erroneous judgement when can prevent encoder from rotating or the problems such as without response, energy
Enough reduce processor load resource utilization, the encoder knob controlling party based on Vehicle Controller that the present invention provides a kind of
Method combines the logical process to judge encoder knob by external interrupt and Interruption, greatly promotes system load money
Source utilization rate, reduce encoder rotation when erroneous judgement the problems such as.
To achieve the goals above, the technical scheme adopted by the invention is as follows:
A kind of encoder knob control method based on Vehicle Controller, includes the following steps:
The port level state variable for initializing encoder port A, encoder port B and encoder port C is 0, setting
First Interruption and the second Interruption configure an external interrupt for encoder port A；
It acquires the port level of encoder port A and judges whether collected port level variation meets in the outside
Disconnected condition confirms that encoder knob rotates and closes external interrupt and opens described the if meeting the external interrupt condition
One Interruption；The step is recycled if being unsatisfactory for external interrupt condition；
The port level of encoder port A, encoder port B and encoder port C are acquired, port level state is obtained and becomes
Amount, when the port level state variable meets the second Interruption condition, confirms the direction of rotation of encoder knob,
Complete rotation detection；
The first Interruption and the second Interruption are closed, external interrupt is opened, by port level state variable clear 0.
Wherein, the second Interruption condition includes variable clockwise and variable counterclockwise；When the port level shape
When state variable is equal to the variable clockwise, confirmation encoder knob is to rotate clockwise, when the port level state variable
When equal to the variable counterclockwise, confirmation encoder knob is rotation counterclockwise.
Wherein, if at least two port level is low or does not collect the second Interruption in setting duty cycle
Condition then closes the first Interruption and the second Interruption, external interrupt is opened, by port level state variable clear 0.
Wherein, the external interrupt of the encoder port A is the interruption of level failing edge.
Wherein, the timing cycle of first Interruption is 200us, and the timing cycle of the second Interruption is 2ms.
Invention additionally discloses a kind of, and the encoder knob based on Vehicle Controller controls equipment, comprising:
Processor is adapted for carrying out each instruction；And
Equipment is stored, is suitable for storing a plurality of instruction, described instruction is for being loaded and being executed by processor:
The port level state variable for initializing encoder port A, encoder port B and encoder port C is 0, setting
First Interruption and the second Interruption configure an external interrupt for encoder port A；
It acquires the port level of encoder port A and judges whether collected port level variation meets in the outside
Disconnected condition confirms that encoder knob rotates and closes external interrupt and opens described the if meeting the external interrupt condition
One Interruption；The step is recycled if being unsatisfactory for external interrupt condition；
The port level of encoder port A, encoder port B and encoder port C are acquired, port level state is obtained and becomes
Amount, when the port level state variable meets the second Interruption condition, confirms the direction of rotation of encoder knob,
Complete rotation detection；
The first Interruption and the second Interruption are closed, external interrupt is opened, by port level state variable clear 0.
Wherein, the second Interruption condition includes variable clockwise and variable counterclockwise；When the port level shape
When state variable is equal to the variable clockwise, confirmation encoder knob is to rotate clockwise, when the port level state variable
When equal to the variable counterclockwise, confirmation encoder knob is rotation counterclockwise.
Wherein, if at least two port level is low or does not collect the second Interruption in setting duty cycle
Condition then closes the first Interruption and the second Interruption, external interrupt is opened, by port level state variable clear 0.
Wherein, the external interrupt of the encoder port A is the interruption of level failing edge.
Wherein, the timing cycle of first Interruption is 200us, and the timing cycle of the second Interruption is 2ms.
The invention has the benefit that
One, the present invention by external break events trigger encoder key rotate judgement handle, when encoder knob without
There is no need to there is any operation when rotation process, periodic scanning port state is not needed, inquiry mode is efficiently solved and leads
The problem of causing processor low efficiency also reduces timing interference of the encoder identification operation to other tasks of system.
Two, it is combined by external interrupt and Interruption, so that entire encoder rotation identification is all in interrupt function
Identification, so that encoder identification is not interrupted by other systems task, ensure that rotation identification by configuring the priority of interruption
Correctness has also evaded erroneous judgement problem when cyclic polling in task.
Three, according to encoder port A, encoder port B and the changing rule of encoder port C level, by obtaining end
It is to operate clockwise or counterclockwise that mouth level state variable, which carries out judgement, simplifies encoder and knows method for distinguishing.
Four, the present invention in external interrupt due to having had identified that key rotation process, it is contemplated that the consistency of code
And robustness, rotation judgement is placed in Interruption and is handled.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the encoder knob control method based on Vehicle Controller of the present invention；
Fig. 2 is the port waveform diagram that inventive encoder knob rotates clockwise；
Fig. 3 is the port waveform diagram that inventive encoder knob rotates counterclockwise.
Specific embodiment
Below with reference to specific embodiment shown in the drawings, the present invention will be described in detail.But these embodiments are simultaneously
The present invention is not limited, structure that those skilled in the art are made according to these embodiments, method or functionally
Transformation is included within the scope of protection of the present invention.
A kind of encoder rotation based on Vehicle Controller is disclosed refering to fig. 1 shown in Fig. 3, in one embodiment of the present invention
Button control method, includes the following steps:
S100: the port level state variable of initialization encoder port A, encoder port B and encoder port C are 0,
First Interruption and the second Interruption are set, configure an external interrupt for encoder port A；
Coder module is initialized, the initialization includes by encoder port A, encoder port B and encoder-side
Mouth C is configured to input port, and the first Interruption and the second Interruption is arranged, and preferably setting timing cycle is
200us, but it is not turned on Interruption at this time.And an external interrupt is configured for encoder port, preferably it is set as level decline
Externally interrupt.Initializing rear port level interim state variable is 0, and port level state variable is 0.
S200: the port level of acquisition encoder port A and to judge whether the variation of collected port level meets described
The condition of external interrupt confirms that encoder knob rotates and closes external interrupt unlatching if meeting the external interrupt condition
First Interruption；The step is recycled if being unsatisfactory for external interrupt condition；
Encoder port A, encoder port B and encoder port C are defaulted as high level, if when rotary encoder, compiled
Code device port A level from high to low when, failing edge external interrupt can be generated.I.e. collected port level meets external interrupt item
Part can confirm that there are rotation process.Then first Interruption is opened, after the first Interruption to timing cycle
It performs the next step rapid.
S300: the port level of acquisition encoder port A, encoder port B and encoder port C obtain port level
State variable confirms the rotation of encoder knob when the port level state variable meets the second Interruption condition
Turn direction, completes rotation detection；
In this step, after waiting the first timing cycle to arrive, the port level of each port is acquired, in port transitory state
In variable, position 0 saves the level state of encoder port A, and position 1 saves the level state of encoder port B, and position 2 saves coding
The level state of device port C.If it is low level that encoder port A, encoder port B or encoder port C, which have a pin,
When encoder port B is low level, the second Interruption condition, port interim state variable=0X05 are triggered；Work as encoder
Port C also triggers the second Interruption condition, port interim state variable=0X03 when being low level.Port level state variable
=port interim state variable.System determines the direction of rotation of encoder knob according to the value of port level state variable, described
Second Interruption condition includes variable clockwise and variable counterclockwise, and variable clockwise is set in one embodiment of the present invention
For 0X03, variable counterclockwise is set as 0X05.When the port level state variable is equal to the variable clockwise, confirmation is compiled
Code device knob is to rotate clockwise, when the port level state variable is equal to the variable counterclockwise, confirmation encoder rotation
Button is rotation counterclockwise.I.e. when encoder port B is low level, the port level state variable is equal to the change clockwise
0X03 is measured, confirmation encoder knob is to rotate clockwise.When encoder port C is low level, the port level state becomes
Amount is equal to the variable 0X05 counterclockwise, and confirmation encoder knob is rotation counterclockwise.
S400: closing the first Interruption and the second Interruption, opens external interrupt, and port level state variable is clear
0.After completing primary rotation detection, each port level state variable clear 0, variable left four are restarted to revolve next time
Turn detection,
If at least two port level is low or does not collect second in setting duty cycle in step S300
Interruption condition then closes the first Interruption and the second Interruption, external interrupt is opened, by port level state variable
Clear 0.In a duty cycle, if the second Interruption is not triggered always, the i.e. second timing of the first Interruption will be closed
It interrupts, opens external interrupt, restart rotation detection.In the duty cycle, if there are two simultaneously with upper port electricity
It puts down to be low, then port level state variable clear 0, closes the first Interruption and the second Interruption, open external interrupt.Institute
Stating duty cycle can be set according to demand, such as be set to 10 milliseconds, 50 milliseconds or 80 milliseconds time cycles, in task week
Turn off the first Interruption, the second Interruption by force if not completing rotation detection in phase, opens external interrupt.
In above embodiment, the timing cycle of first Interruption may be set to 200us, the second Interruption
Timing cycle may be set to the value between 1-2 milliseconds.First Interruption, the second Interruption can carry out spirit according to demand
Configuration living.
A kind of encoder knob control equipment based on Vehicle Controller, packet are also disclosed in one embodiment of the present invention
It includes:
Processor is adapted for carrying out each instruction；And
Equipment is stored, is suitable for storing a plurality of instruction, described instruction is for being loaded and being executed by processor:
The port level state variable for initializing encoder port A, encoder port B and encoder port C is 0, setting
First Interruption and the second Interruption configure an external interrupt for encoder port A；
It acquires the port level of encoder port A and judges whether collected port level variation meets in the outside
Disconnected condition confirms that encoder knob rotates and closes external interrupt and opens described the if meeting the external interrupt condition
One Interruption and the second Interruption；The step is recycled if being unsatisfactory for external interrupt condition；
The port level of encoder port A, encoder port B and encoder port C are acquired, port level state is obtained and becomes
Amount, when the port level state variable meets the second Interruption condition, confirms the direction of rotation of encoder knob,
Complete rotation detection；
The first Interruption and the second Interruption are closed, external interrupt is opened, by port level state variable clear 0.
In one embodiment, the second Interruption condition includes variable clockwise and variable counterclockwise；When described
When port level state variable is equal to the variable clockwise, confirmation encoder knob is to rotate clockwise, when the port electricity
When flat-shaped state variable is equal to the variable counterclockwise, confirmation encoder knob is rotation counterclockwise.
In the another improvement embodiment of above embodiment, the timing cycle of first Interruption is 200us,
The timing cycle of second Interruption is 2ms.
In the another improvement embodiment of above embodiment, the external interrupt of the encoder port A is level decline
Along interruption.
In the another improvement embodiment of above embodiment, the timing cycle of first Interruption be may be set to
200us, the timing cycle of the second Interruption may be set to the value between 1-2 milliseconds.
In above embodiment, judgement processing is rotated by the key that external break events trigger encoder, works as encoder
There is no need to there is any operation when knob operates without spin, periodic scanning port state is not needed, inquiry is efficiently solved
Mode leads to the problem of processor low efficiency, also reduces timing interference of the encoder identification operation to other tasks of system.It is logical
It crosses external interrupt and Interruption combines, so that entire encoder rotation identification all identifies in interrupt function, pass through and configure
The priority of interruption ensure that the correctness of rotation identification, also evade so that encoder identification is not interrupted by other systems task
Erroneous judgement problem in task when cyclic polling.According to the change of encoder port A, encoder port B and encoder port C level
Law is to operate clockwise or counterclockwise by obtaining port level state variable to carry out judgement, simplifies encoder knowledge
Method for distinguishing.The present invention in external interrupt due to having had identified that key rotation process, it is contemplated that the consistency of code and
Rotation judgement is placed in Interruption and handles by robustness.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of encoder knob control method based on Vehicle Controller, it is characterised in that include the following steps:
The port level state variable for initializing encoder port A, encoder port B and encoder port C is 0, setting first
Interruption and the second Interruption configure an external interrupt for encoder port A；
It acquires the port level of encoder port A and judges whether collected port level variation meets the external interrupt
Condition confirms that encoder knob rotates and closes external interrupt unlatching described first and determines if meeting the external interrupt condition
When interrupt；The step is recycled if being unsatisfactory for external interrupt condition；
The port level of encoder port A, encoder port B and encoder port C are acquired, port level state variable is obtained,
When the port level state variable meets the second Interruption condition, the direction of rotation of encoder knob is confirmed, it is complete
It is detected at rotation；
The first Interruption and the second Interruption are closed, external interrupt is opened, by port level state variable clear 0；
The second Interruption condition includes variable clockwise and variable counterclockwise；When the port level state variable is equal to
When the variable clockwise, confirmation encoder knob is to rotate clockwise, when the port level state variable is equal to described inverse
When hour hands variable, confirmation encoder knob is rotation counterclockwise；
If at least two port level is low or does not collect the second Interruption condition in setting duty cycle, close
The first Interruption and the second Interruption are closed, external interrupt is opened, by port level state variable clear 0；
The external interrupt of the encoder port A is the interruption of level failing edge.
2. a kind of encoder knob control method based on Vehicle Controller according to claim 1, it is characterised in that: institute
The timing cycle for stating the first Interruption is 200us, and the timing cycle of the second Interruption is 2ms.
3. a kind of encoder knob based on Vehicle Controller controls equipment, characterized by comprising:
Processor is adapted for carrying out each instruction；And
Equipment is stored, is suitable for storing a plurality of instruction, described instruction is for being loaded and being executed by processor:
The port level state variable for initializing encoder port A, encoder port B and encoder port C is 0, setting first
Interruption and the second Interruption configure an external interrupt for encoder port A；
It acquires the port level of encoder port A and judges whether collected port level variation meets the external interrupt
Condition confirms that encoder knob rotates and closes external interrupt unlatching described first and determines if meeting the external interrupt condition
When interrupt；The step is recycled if being unsatisfactory for external interrupt condition；
The port level of encoder port A, encoder port B and encoder port C are acquired, port level state variable is obtained,
When the port level state variable meets the second Interruption condition, the direction of rotation of encoder knob is confirmed, it is complete
It is detected at rotation；
The first Interruption and the second Interruption are closed, external interrupt is opened, by port level state variable clear 0；
The second Interruption condition includes variable clockwise and variable counterclockwise；When the port level state variable is equal to
When the variable clockwise, confirmation encoder knob is to rotate clockwise, when the port level state variable is equal to described inverse
When hour hands variable, confirmation encoder knob is rotation counterclockwise；
If at least two port level is low or does not collect the second Interruption condition in setting duty cycle, close
The first Interruption and the second Interruption are closed, external interrupt is opened, by port level state variable clear 0；
The external interrupt of the encoder port A is the interruption of level failing edge.
4. encoder knob according to claim 3 based on Vehicle Controller controls equipment, it is characterised in that: described the
The timing cycle of one Interruption is 200us, and the timing cycle of the second Interruption is 2ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387573.8A CN107290991B (en) | 2017-05-27 | 2017-05-27 | Encoder knob control method and equipment based on Vehicle Controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387573.8A CN107290991B (en) | 2017-05-27 | 2017-05-27 | Encoder knob control method and equipment based on Vehicle Controller |
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| CN107290991A CN107290991A (en) | 2017-10-24 |
| CN107290991B true CN107290991B (en) | 2019-07-02 |
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| CN201710387573.8A Active CN107290991B (en) | 2017-05-27 | 2017-05-27 | Encoder knob control method and equipment based on Vehicle Controller |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112146686B (en) * | 2019-06-27 | 2022-07-15 | 西安诺瓦星云科技股份有限公司 | Rotation information acquisition method, device and system and computer readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8866643B2 (en) * | 2010-09-07 | 2014-10-21 | Alps Electric Co., Ltd. | Rotation input device |
| CN102866724B (en) * | 2011-07-08 | 2015-04-22 | 阿尔派株式会社 | Electronic equipment and adjustment method thereof |
| CN103207754B (en) * | 2012-01-13 | 2016-12-14 | 阿尔派株式会社 | E-machine and the method for controlling operation thereof of e-machine |
| CN104898763A (en) * | 2015-04-15 | 2015-09-09 | 广东好帮手电子科技股份有限公司 | Turn button control-adjustment method and system of vehicle-mounted encoder |
| CN106200548B (en) * | 2016-08-23 | 2019-06-04 | 惠州华阳通用电子有限公司 | A kind of control method and circuit of optoelectronic induction knob |
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Address after: No. 289, 291, Binhai Second Road, Wenzhou Economic and Technological Development Zone, Wenzhou City, Zhejiang Province, 325025 Patentee after: Zhejiang Changjiang Automobile Electronics Co.,Ltd. Address before: 325025 No. 289 Binhai Second Road, Wenzhou Economic and Technological Development Zone, Zhejiang Province Patentee before: WENZHOU CHANGJIANG AUTOMOBILE ELECTRONIC SYSTEM Co.,Ltd. |