CN108664302A - The implementation method of the type pointer virtual instrument of high performance-price ratio - Google Patents
The implementation method of the type pointer virtual instrument of high performance-price ratio Download PDFInfo
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- CN108664302A CN108664302A CN201810373008.0A CN201810373008A CN108664302A CN 108664302 A CN108664302 A CN 108664302A CN 201810373008 A CN201810373008 A CN 201810373008A CN 108664302 A CN108664302 A CN 108664302A
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/451—Execution arrangements for user interfaces
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Abstract
The present invention discloses a kind of implementation method of the type pointer virtual instrument of high performance-price ratio, includes step 1：Digital pointer-free instrument board base map and each one of digital pointer figure are made, and the two pictures data are stored in memory；Step 2：MCU reads the data of digital pointer-free instrument board base map from memory, and display on a display screen is used as background；Step 3：After MCU reads the data information of sensor Real-time Feedback for the first time, it is parsed into the pointer real-time instruction angle, θ to be indicated1；Pointer is in self-indication initial angle θ0Rotation indicates angle, θ to real-time1During, pointer is at interval of a single rotation angle θ2Place's display is primary；Adjacent to show that time slot is identical twice, pointer can form a coherent running orbit；Thereby, other than pointer-free instrument board base map, a pointer figure is only needed, drives virtual mouse to rotate to corresponding angle using track operation method, can effectively take into account properties of product and product cost, be suitable for popularization and application.
Description
Technical field
The present invention relates to type pointer virtual instrument field technologies, refer in particular to a kind of type pointer virtual instrument of high performance-price ratio
Implementation method.
Background technology
Conventional instrument is physical indicator, in order to realize that traditional pointer running orbit, TFT pass through a series of algorithm
The operation of analog display hand, therefore TFT instrument is also virtual instrument.
Currently, in automotive field, avionics system cockpit display field etc., embedded type virtual instrument is introduced already.In early days
Embedded type pointer virtual instrument, correspond to each pointer angle variation, be required for storage one frame image；If needing
The each degree of rotation of pointer, the how many degree of pointer traversal is wanted just to need to be previously stored how many Zhang Zhizhen different angles in memory
Picture, therefore, required memory capacity are huge, this by factors such as cost, volumes for being influenced and memory-limited
Embedded system for, a undoubtedly great challenge.
Later, in the patent of invention document application No. is 201210136036.3, it discloses a kind of embedded pointers
Formula virtual instrument implementation method includes at least following steps：It makes digital dial plate picture and meets the meter diagram of different angle
Piece；It will be in the pixel Value Data deposit memory of the digital dial plate picture of making；It is obtained using the instrument picture of different angle
Meet the pointer-digit structured data of different angle, and is deposited into memory；The pointer-free data read from memory
Dial plate picture, which is shown, is used as background；Dynamic instrument is shown since pointer current angle position；It obtains and needs pointer aobvious in real time
The power information shown；Corresponding pointer picture library pointer is determined according to the power information for needing pointer to indicate；System is read from memory
Fetching needle shows the corresponding pointer picture of pointer in the pointer structure volume data of corresponding position.Compared to the insertion of early stage
For formula type pointer virtual instrument, method disclosed in the patent of invention document application No. is 201210136036.3 has really
Larger progressive.But there is still a need for the valid data for storing a large amount of pointer pictures, i.e.,：It needs to store in its memory
Data when from data of the pointer in initial angle to throw of pointer to maximum angle, all angle-datas of pointer traversal；
Height is required to driving chip, needs to use expensive driving chip, causes its product cost and price high, one
As be only applicable on high-end automobile, it is difficult to be used widely.
And at present in the applicable cases of marine instrumentation：Since the algorithm of TFT instrument analog physical pointer running orbits consumes
Take a large amount of resources of chip, therefore marine instrumentation generally runs algorithm with the non-track of instantaneous lattice display at this stage, no continuity,
Picture seems stiff, and display effect less meets the visual perception of people, uses operating experience less effective.In fact, right
For the automobile of many low and middle-ends, there is also the above problems of marine instrumentation.
Therefore, in present patent application, applicant has studied intensively a kind of new technical solution, to solve above-mentioned ask
Topic.
Invention content
In view of this, in view of the deficiencies of the prior art, the present invention aims to provide a kind of high performance-price ratios
The implementation method of type pointer virtual instrument only needs a pointer figure, utilizes track other than pointer-free instrument board base map
Operation method drives virtual mouse to rotate to corresponding angle, can effectively take into account properties of product and product cost, is suitable for
It promotes and applies.
To achieve the above object, the present invention is using following technical solution：
A kind of implementation method of the type pointer virtual instrument of high performance-price ratio, includes the following steps：
Step 1：Digital pointer-free instrument board base map and each one of digital pointer figure are made, and the two pictures data are deposited
Enter in memory；Wherein, the instruction initial angle of pointer shown in digital pointer figure θ0；
Step 2：MCU reads the data of digital pointer-free instrument board base map from memory, is shown on a display screen as the back of the body
Scape, system need to only be called once, and background is always static, not need dynamic realtime refreshing；And MCU is read from memory
The data for taking digital pointer figure show that pointer, pointer indicate initial angle θ on a display screen0；
Step 3：After MCU reads the data information of sensor Real-time Feedback for the first time, it is parsed into the pointer real-time indicated angle to be indicated
Spend θ1；By θ1Subtract θ0 Obtain angle difference θ；
Pointer is in self-indication initial angle θ0Rotation indicates angle, θ to real-time1During, pointer is rotated at interval of a single
Angle, θ2Place's display is primary, that is, pointer is successively in θ0+ N times of θ2Angle value at gradually show, N is integer, θ2For positive number angle
Angle value, N times of θ2Equal to θ；Adjacent to show that time slot is identical twice, visually, pointer can form a coherent operation rail
Mark；
Only it is stored in the data of a digital pointer figure in memory, MCU is according to the data of digital pointer figure, and first operation is from finger
Needle indicates initial angle θ0To θ0+θ2Angle value at digital pointer figure data variation amount, show pointer on a display screen
Instruction is in θ0+θ2Angle value at；Operation indicates angle, θ from pointer again0+θ2To θ0+ 2 times of θ2Angle value at digital pointer figure
Data variation amount, show on a display screen pointer instruction in θ0+2θ2Angle value at；And so on, until in display screen
On show pointer instruction in θ1Angle value at stop；MCU can preserve the data variation amount of the current instruction angle of pointer.
As a preferred embodiment, MCU drives finger clockwise direction rotational display when the θ is positive number, when θ is negative
MCU drives pointer counter clockwise direction rotational display.
As a preferred embodiment, the single rotation angle θ2Less than or equal to 1 °.
As a preferred embodiment, it is described it is adjacent show twice time slot be less than or equal to 0.01 second.
As a preferred embodiment, type pointer virtual instrument is revolution counter or velocity of displacement table.
As a preferred embodiment, the data information of sensor feedback is stored in memory through CAN bus, and MCU is from memory
Read the data information of sensor Real-time Feedback.
As a preferred embodiment, MCU is after the data information of second of sensor Real-time Feedback read above, parsing
The real-time instruction angle, θ to be indicated at pointer3；MCU is according to θ3Subtract the instruction angle of last pointer；Rotational trajectory display fortune
The data variation amount of current instruction angle of the calculation method based on last pointer.
The present invention has clear advantage and advantageous effect compared with prior art, specifically, by above-mentioned technical proposal
It is found that it only needs a pointer figure, void is driven using track operation method mainly other than pointer-free instrument board base map
Quasi- pointer is rotated to corresponding angle, and the adjacent of pointer shows that time slot is identical twice, and visually, pointer can form one
At the uniform velocity coherent running orbit；Since it need to only store the data of two figures, compared to for traditional technology, number is considerably reduced
According to amount of storage, a large amount of Installed System Memory is saved, therefore, is no longer limited in the selection of driving chip, is conducive to control
Product cost, meanwhile, real-time display effect is good, and accuracy is high, and friendly interface is intuitive, thus, it is possible to effectively take into account product
Performance and product cost, it is cost-effective, it is fully compatible for promoting and applying, for example, being suitable for peculiar to vessel and automobile-used etc., can be changed with large area
Become " no continuity, picture seem stiff, and display effect is not good enough " phenomenon that peculiar to vessel, low and middle-end auto meter is presented, benefits
More multi-user gives the better visual experience of user.
More clearly to illustrate the structure feature and effect of the present invention, come below in conjunction with the accompanying drawings to this hair with specific embodiment
It is bright to be described in detail.
Description of the drawings
Fig. 1 is the structural principle block diagram of embodiments of the present invention；
Fig. 2 is the general diagram of the dial plate and pointer picture of embodiments of the present invention（Only need a digital pointer-free instrument
It tries to get to the heart of a matter figure, a digital pointer figure）；
Fig. 3 is the implementation process schematic diagram of the type pointer virtual instrument of embodiments of the present invention.
Description of drawing identification：
100, pointer-free instrument board base map 200, pointer figure
1, MCU 2, memory
3, CAN bus 4, sensor
5, display screen.
Specific implementation mode
It please refers to shown in Fig. 1 to Fig. 3, that show the concrete structure of embodiments of the present invention and principles；A kind of high property
Valence than type pointer virtual instrument implementation method, include the following steps：
Step 1：Digital pointer-free instrument board base map and each one of digital pointer figure are made, and the two pictures data are deposited
Enter in memory；Wherein, the instruction initial angle of pointer shown in digital pointer figure θ0；Digital pointer-free instrument board base map sum number
Word formula pointer figure is intended to embody corresponding figure, color, scale etc.；
Step 2（Original state）：MCU1 reads the data of digital pointer-free instrument board base map from memory 2, in display screen 5
Upper display pointer-free instrument board base map 100 is used as background, system that need to only call once, and background is always static, need not be moved
State refreshes in real time；And MCU1 reads the data of digital pointer figure from memory 2, and pointer figure is shown on display screen 5
200, pointer indicates initial angle θ0；
Step 3（Real-time track operation）：After MCU1 reads the data information of 4 Real-time Feedback of sensor for the first time, it is parsed into pointer and wants
The real-time instruction angle, θ indicated1；By θ1Subtract θ0Obtain angle difference θ.θ divided by θ2Gained integer, which is pointer, to be shown successively
The times N shown, whens N values, can be according to the principles that rounds up.Herein, the data information that sensor as aforementioned 4 is fed back is through CAN bus
3 deposit memories 2, MCU1 read the data information of 4 Real-time Feedback of sensor from memory 2；
Pointer is in self-indication initial angle θ0Rotation indicates angle, θ to real-time1During, pointer is rotated at interval of a single
Angle, θ2Place's display is primary, that is, pointer is successively in θ0+ N times of θ2Angle value at gradually show, N is integer, θ2For positive number angle
Angle value, N times of θ2Equal to θ；Adjacent to show that time slot is identical twice, visually, pointer can form a coherent operation rail
Mark；In general, in adjacent display location twice, it is overlapping that the display twice of pointer, which has more subregion, therefore, last
Through operation variable to showing next time after display, it is that display is blocked in instrument again that embodiment, which is a part of region, from display screen
Before background, a part of region is blanking to expose the background of instrument again, and a part is to maintain the state of last display, this
Sample becomes more simplified for calculation process.
The data of a digital pointer figure are only stored in memory, MCU is according to the data of digital pointer figure, first operation
From pointer instruction initial angle θ0To θ0+θ2Angle value at digital pointer figure data variation amount, show on a display screen
Pointer is indicated in θ0+θ2Angle value at；Operation indicates angle, θ from pointer again0+θ2To θ0+ 2 times of θ2Angle value at digital finger
The data variation amount of needle figure shows pointer instruction in θ on a display screen0+2θ2Angle value at；And so on, until aobvious
Show pointer instruction in θ in display screen1Angle value at stop；The data that MCU can only preserve the current instruction angle of pointer become
Change amount is indicated referred to herein as needle in θ1Angle value at when data variation amount, the data variation of different angle need not be stored
Amount.In the calculating process of track, operation and display can be carried out at the same time, and be conducive to protect the being swift in response property of gauge pointer
Card.
Step 4（Real-time track operation）：MCU is after the data information of second of sensor Real-time Feedback read above, solution
Analyse into the pointer real-time instruction angle, θ to be indicated3；MCU is according to θ3Subtract the instruction angle of last pointer；Rotational trajectory is shown
The data variation amount of current instruction angle of the operation method based on last pointer.Its track operation method and 3 institute of abovementioned steps
The method stated is identical, and only step 3 is with pointer instruction initial angle θ0When for last current instruction angle.
Typically, MCU drives finger clockwise direction rotational display when the θ is positive number, and MCU drives when θ is negative
Pointer counter clockwise direction rotational display.The single rotation angle θ2Less than or equal to 1 °.It is described adjacent to show twice between the time
Gap T is less than or equal to 0.01 second.
Next, a specific example is lifted to illustrate:
The maximum (top) speed 8000RPM of revolution counter, rotation angle are up to 270.MCU reads the data information of sensor:Rotating speed is
4000RPM is parsed into the pointer real-time instruction angle, θ to be indicated1=4000/8000*270 °=135 °, if just with pointer instruction
Beginning angle, θ0When for last current instruction angle, usually, pointer instruction initial angle θ0It it is 0 degree, by θ1Subtract θ0 It obtains
Angle difference θ=135 °.If the time slot of setting 0.01 second, with 1 ° for single rotation angle, rotates to 135 ° of positions and stops,
In this way, pointer gradually shows that pointer is schemed as independent one at 1 °, 2 °, 3 ° ... the angle values up to 135 ° successively
Sheet data runs algorithm based on track, gradually shows, visually, formation is at the uniform velocity rotated using one end position of pointer as the center of circle
Coherent running orbit.It is repeatedly experienced through actual test, experiment and several testing crews, pointer was rotated with display in 0.01 second
Under the premise of 1 ° of operation display parameters, display visual effect is smooth and not will produce image, while not interfering with hardware handles
Other things.Certainly, display time slot is less than 0.01 second and single rotation angle θ2In the case of 1 degree, theoretically and
Speech, visual effect more smooth, correspondingly, to requiring meeting more slightly higher in the selection of driving chip.
Preferably, type pointer virtual instrument be revolution counter or velocity of displacement table, certainly, it is not limited to both instrument,
Can be other arbitrary type pointer virtual instruments.
In fact, as the configuration of the internal electronic equipments such as yacht, automobile is more and more abundant, it can not be same using conventional instrument
When show that many information or datas, TFT instrument can show a large amount of information and data, interface display phase by screens switch
To also more aesthetically pleasing, therefore, it is common to use TFT instrument is the trend of the following instrument development, and TFT instrument will be pushed away on a large scale
Extensively, product cost and price are the key factors that must take into account, and in the present patent application, are exactly based on to pointer empty
The implementation method of quasi- instrument is innovated, to obtain the pointer-type that a kind of good product performance and product cost are greatly reduced
Virtual instrument.
In conclusion the design focal point of the present invention is, mainly other than pointer-free instrument board base map, only need
One pointer figure drives virtual mouse to rotate to corresponding angle using track operation method, when pointer adjacent shows twice
Between gap it is identical, visually, pointer can form an at the uniform velocity coherent running orbit；Since it need to only store the number of two figures
According to compared to for traditional technology, considerably reducing data storage capacity, save a large amount of Installed System Memory, therefore, driving
No longer limited in the selection of chip, is conducive to control product cost, meanwhile, real-time display effect is good, and accuracy is high, interface
It is friendly intuitive, thus, it is possible to properties of product and product cost are effectively taken into account, it is cost-effective, it is fully compatible for promoting and applying, example
Such as, it is suitable for peculiar to vessel and automobile-used etc., " no continuity, picture that peculiar to vessel, low and middle-end auto meter is presented can be changed with large area
Seem stiff, display effect is not good enough " phenomenon, more multi-user is benefited, the better visual experience of user is given.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention,
Therefore it is every according to the technical essence of the invention to any subtle modifications, equivalent variations and modifications made by above example, still
Belong in the range of technical solution of the present invention.
Claims (7)
1. a kind of implementation method of the type pointer virtual instrument of high performance-price ratio, it is characterised in that：Include the following steps：
Step 1：Digital pointer-free instrument board base map and each one of digital pointer figure are made, and the two pictures data are deposited
Enter in memory；Wherein, the instruction initial angle of pointer shown in digital pointer figure θ0；
Step 2：MCU reads the data of digital pointer-free instrument board base map from memory, is shown on a display screen as the back of the body
Scape, system need to only be called once, and background is always static, not need dynamic realtime refreshing；And MCU is read from memory
The data for taking digital pointer figure show that pointer, pointer indicate initial angle θ on a display screen0；
Step 3：After MCU reads the data information of sensor Real-time Feedback for the first time, it is parsed into the pointer real-time indicated angle to be indicated
Spend θ1；By θ1Subtract θ0 Obtain angle difference θ；
Pointer is in self-indication initial angle θ0Rotation indicates angle, θ to real-time1During, pointer is rotated at interval of a single
Angle, θ2Place's display is primary, that is, pointer is successively in θ0+ N times of θ2Angle value at gradually show, N is integer, θ2For positive number angle
Angle value, N times of θ2Equal to θ；Adjacent to show that time slot is identical twice, visually, pointer can form a coherent operation rail
Mark；
Only it is stored in the data of a digital pointer figure in memory, MCU is according to the data of digital pointer figure, and first operation is from finger
Needle indicates initial angle θ0To θ0+θ2Angle value at digital pointer figure data variation amount, show pointer on a display screen
Instruction is in θ0+θ2Angle value at；Operation indicates angle, θ from pointer again0+θ2To θ0+ 2 times of θ2Angle value at digital pointer figure
Data variation amount, show on a display screen pointer instruction in θ0+2θ2Angle value at；And so on, until in display screen
On show pointer instruction in θ1Angle value at stop；MCU can preserve the data variation amount of the current instruction angle of pointer.
2. the implementation method of the type pointer virtual instrument of high performance-price ratio according to claim 1, it is characterised in that：The θ
For positive number when MCU drive finger clockwise direction rotational display, MCU drives pointer counter clockwise direction rotational display when θ is negative.
3. the implementation method of the type pointer virtual instrument of high performance-price ratio according to claim 1, it is characterised in that：The list
Secondary rotation angle θ2Less than or equal to 1 °.
4. the implementation method of the type pointer virtual instrument of high performance-price ratio according to claim 1, it is characterised in that：The phase
Neighbour shows that time slot is less than or equal to 0.01 second twice.
5. the implementation method of the type pointer virtual instrument of high performance-price ratio according to claim 1, it is characterised in that：Pointer-type
Virtual instrument is revolution counter or velocity of displacement table.
6. the implementation method of the type pointer virtual instrument of high performance-price ratio according to claim 1, it is characterised in that：Sensor
The data information of feedback is stored in memory through CAN bus, and MCU reads the data information of sensor Real-time Feedback from memory.
7. the implementation method of the type pointer virtual instrument of high performance-price ratio according to claim 1, it is characterised in that：MCU exists
After the data information of second of sensor Real-time Feedback read above, it is parsed into the pointer real-time instruction angle, θ to be indicated3；MCU
According to θ3Subtract the instruction angle of last pointer；Rotational trajectory shows current indicated angle of the operation method based on last pointer
The data variation amount of degree.
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