CN110936908A - Quick response method and device of vehicle-mounted display system based on operating system - Google Patents
Quick response method and device of vehicle-mounted display system based on operating system Download PDFInfo
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- CN110936908A CN110936908A CN201911150918.3A CN201911150918A CN110936908A CN 110936908 A CN110936908 A CN 110936908A CN 201911150918 A CN201911150918 A CN 201911150918A CN 110936908 A CN110936908 A CN 110936908A
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- vehicle
- mounted display
- trigger signal
- display system
- liquid crystal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Arrangement of adaptations of instruments
Abstract
The invention relates to a quick response method and device of a vehicle-mounted display system based on an operating system. The vehicle-mounted display system comprises a liquid crystal instrument, and the method comprises the following steps: s1, receiving a first trigger signal, and pre-starting an operating system and switching on a power supply of the liquid crystal instrument by the vehicle-mounted display system, wherein the pre-starting operating system only comprises an operating system kernel and a loading file; and S2, receiving a second trigger signal, and controlling the liquid crystal instrument to display a corresponding graphic picture by the vehicle-mounted display system according to the second trigger signal. According to the invention, the operating system is pre-started in advance according to the first trigger signal, and the kernel is operated to prepare for rapidly displaying the driving information. When the second trigger signal is received, the liquid crystal instrument can obtain quick response and does not need to wait any more, so that the user satisfaction is greatly improved.
Description
Technical Field
The invention relates to the technical field of automobile electronic control, in particular to a quick response method and device of a vehicle-mounted display system based on an operating system.
Background
With the development of the car networking technology, the electric, intelligent and light automobiles tend to be more and more. The safety and individuation requirements of users on the vehicle-mounted display system are higher and higher, the vehicle-mounted display system is required to have a high-definition man-machine interaction interface with pictures and three-dimensional images, and the system response is required to be accurate in real time.
At present, the liquid crystal screen technology is more and more mature, the cost is also more and more low, and the vehicle-mounted display system makes full use of the liquid crystal screen and shows the driving information more vividly. Meanwhile, in order to improve the intellectualization and the individualization of the vehicle-mounted display system, devices such as an automobile instrument and a central control display screen are widely provided with an operating system, such as Linux and Android, and the like, so that a new problem is faced. When a user directly operates the vehicle each time the vehicle gets on without ignition, some information has a problem of significant lag due to the long start-up time of the operating system.
In the prior art, much effort is added to the hierarchical optimization and content simplification of an operating system, but the display delay problem still occurs, for example, when a user directly operates a vehicle under the condition of getting on the vehicle and not igniting every time, for example, a liquid crystal instrument is used as an example, the liquid crystal instrument collects a specific combination switch signal, and a main control chip turns on a power supply of a related circuit module and transmits a starting instruction to a display driving chip through a serial bus. The liquid crystal instrument starts to start the operating system, runs the kernel, loads the file, and displays the related application picture, and the specific flow is shown in fig. 1. Because the user directly operates the vehicle under the condition of no ignition every time when getting on the vehicle, the user needs to wait for the start of the operating system, the general start time is from several seconds to tens of seconds, corresponding operation cannot be indicated in time, the user experience of a corresponding product is poor, and even the user complains. In order to improve user experience without reducing display content and quality, a rapid response method is urgently needed to be developed for an operating system-based vehicle-mounted display system.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a quick response method and a quick response device of a vehicle-mounted display system based on an operating system, and the quick response method and the quick response device have the remarkable advantages of simplicity, low cost, high reliability and the like.
The technical scheme for solving the technical problems is as follows:
in a first aspect, the present invention provides a fast response method for an operating system-based vehicle-mounted display system, where the vehicle-mounted display system includes a liquid crystal instrument, and the method includes the following steps:
s1, receiving a first trigger signal, and pre-starting an operating system and switching on a power supply of the liquid crystal instrument by the vehicle-mounted display system, wherein the pre-starting operating system only comprises an operating system kernel and a loading file;
and S2, receiving a second trigger signal, and controlling the liquid crystal instrument to display a corresponding graphic picture by the vehicle-mounted display system according to the second trigger signal.
The invention has the beneficial effects that: and according to the first trigger signal, pre-starting the operating system in advance, and operating the kernel to prepare for quickly displaying the driving information. When the second trigger signal is received, the liquid crystal instrument can obtain quick response and does not need to wait any more, so that the user satisfaction is greatly improved.
Further, the steps S1 and S2 further include:
and S11, timing by the vehicle-mounted display system timer, if the second trigger signal is not received within the preset time T after the first trigger signal is received and no ignition operation is performed, turning off the power supply of the liquid crystal instrument, and if the second trigger signal is received within the preset time T after the first trigger signal is received, jumping to the step S2.
Further, the step S2 specifically includes: after receiving the second trigger signal, the vehicle-mounted display system analyzes the second trigger signal to obtain a corresponding control instruction, and a controller of the vehicle-mounted display system sends the control instruction to the graphic processor through the quick response instruction transmission circuit to drive the liquid crystal instrument to display related contents.
Furthermore, the rapid response instruction transmission circuit comprises a voltage division filter circuit, an electronic switch and a resistance-capacitance filter circuit which are sequentially and electrically connected, wherein the input end of the voltage division filter circuit is connected with an I/O interface of the controller, the output end of the resistance-capacitance filter circuit is connected with the I/O interface of the graphic processor, and a pull-up resistor is connected to a connection node of the electronic switch and the resistance-capacitance filter circuit and is connected with a power supply of the graphic processor.
The signal interaction between the microcontroller and the micro-graphic processor is realized by using a simple and low-cost level conversion and transmission circuit, and the circuit is reliable and stable, has quick response and does not consume excessive software resources.
Further, the first trigger signal comprises a smart key unlocking signal, a vehicle door state signal, a mechanical key insertion signal and an emergency warning lamp signal.
Further, the second trigger signal includes toggling a combination switch.
The invention provides a control device of a vehicle-mounted display system, which is characterized by comprising a controller and a graphic processor, wherein the controller is used for signal acquisition, bus communication and instruction control of the vehicle-mounted display system, and the graphic processor is used for signal interaction, picture display and animation driving of the vehicle-mounted display system;
the controller is connected with the graphics processor through a quick response instruction transmission circuit;
the quick response instruction transmission circuit comprises a voltage division filter circuit, an electronic switch and a resistance-capacitance filter circuit which are sequentially and electrically connected, wherein the input end of the voltage division filter circuit is connected with an I/O interface of a controller, the output end of the resistance-capacitance filter circuit is connected with the I/O interface of a graphic processor, and a pull-up resistor is connected to a connection node of the electronic switch and the resistance-capacitance filter circuit and is used for supplying power to the graphic processor.
Drawings
FIG. 1 is a control flow chart of a prior art operating system-based vehicle display system;
FIG. 2 is a flow chart of the fast response control provided by the embodiment of the present invention;
FIG. 3 is a logic diagram of the fast response command transmitting circuit of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Examples
The liquid crystal instrument provided by the embodiment of the invention is provided with the embedded Linux system, can drive high-definition liquid crystal screens with various sizes, and displays high-quality pictures and animations. The liquid crystal instrument consists of a microcontroller chip (hereinafter referred to as MCU) and a micro graphic processor chip (hereinafter referred to as MPU), wherein the MCU is used for signal acquisition, bus communication, partial driving, instruction control and the like of a vehicle-mounted display system; the MPU is used for signal interaction, picture display, animation drive and the like of the vehicle-mounted display system. The two chips communicate with each other through a UART serial bus and are provided with a plurality of quick response instruction transmission circuits.
The liquid crystal instrument awakening condition provided by the embodiment of the invention is related to trigger signals such as an intelligent key unlocking signal, a vehicle door state signal, a mechanical key inserting signal and an emergency warning lamp signal of a user. The following describes the related art of the present invention with reference to the process control flow diagram of fig. 2 and taking the example of associating the wake-up condition with the key fob unlocking signal.
When a user uses the intelligent key to unlock the whole vehicle, the MCU captures an intelligent key unlocking trigger signal, and the trigger signal generally adopts a rising edge or falling edge capturing mode, so that the instantaneity of instrument acquisition is improved. After the liquid crystal instrument judges that the trigger signal is effective, the self-adaptive identification of a starting mode is firstly carried out, if the trigger signal is in an awakening mode, a microcontroller chip of the instrument firstly turns on a power supply of a display driving module, and a micro-graphic processor chip starts to work. At the moment, the liquid crystal instrument enters a pre-starting state, namely, an operating system is started in advance, a kernel is operated, and a file is loaded, but a backlight power supply of the liquid crystal screen is not turned on, and related application programs are not displayed temporarily. And meanwhile, a timer of the instrument starts to count N seconds, and whether the combination switch of the vehicle is operated or not when the user does not ignite is judged. There are two cases: when the user gets on the vehicle and does not ignite or toggle the combination switch, the liquid crystal instrument turns off the power supply and enters a low power consumption mode. The N seconds of timing is related to a specific strategy, and the aim is to accurately control the power consumption of the liquid crystal instrument when the liquid crystal instrument is started in advance; when a user gets on the vehicle and does not ignite, the liquid crystal instrument directly dials the combination switch, the liquid crystal instrument firstly collects the combination switch signal and judges the specific light type, the MCU sends the indication information to the display driving chip through the quick response instruction transmission circuit, and the driving chip displays the related application picture in real time. In the process, the communication is respectively carried out through one common input/output port of the MCU and one common input/output port of the MPU, the operating system does not run the kernel and does not load files, and therefore the starting time of the operating system is saved.
When a user directly operates the vehicle under the condition of no ignition in the vehicle, the vehicle-mounted display system provided by the embodiment can realize quick response, and the response time can be controlled within one second. The vehicle-mounted display system monitors the trigger signal of the user in real time, performs system pre-starting according to the trigger signal, bypasses the starting time of the operating system, and displays the corresponding indicator light and the prompt information in real time. The total response time does not exceed one second in the whole process of signal acquisition, processing and level conversion, and users hardly feel delay lag feeling and have good user experience.
The MCU and the MPU can realize signal interaction by using simple and low-cost level conversion and transmission circuits, and are reliable and stable and quick in response. In the hardware circuit scheme shown in fig. 3, taking as an example that the MCU sends a turn-on or turn-off command of the dipped headlight indicator to the MPU, the general input/output port of the MCU is connected to the electronic switch through resistance voltage division and capacitance filtering, then connected to the power supply of the MPU through a pull-up resistor, and connected to a general input/output port of the MPU through a resistance-capacitance filter circuit. Therefore, the high level (or low level) of the MCU becomes the low level (or high level) with the voltage level unified with the MPU after passing through the circuit, thereby reliably realizing level conversion and signal transmission without consuming excessive software resources.
The static power consumption of the vehicle-mounted display system is controlled to be at an extremely low level by adopting a dual-core platform of a microcontroller and a micro graphic processor. The microcontroller is mainly used for monitoring and collecting the wake-up signal of the vehicle-mounted display system, namely when the wake-up signal is not triggered, the power supplies of all external equipment of a microcontroller chip are turned off, so that a product enters a dormant state, and static current control is performed; meanwhile, if the wake-up signal is triggered, the vehicle-mounted electronic system wakes up immediately, and picture display, animation driving and the like are carried out through the micro-graphic processor.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A quick response method of an operating system-based vehicle-mounted display system, wherein the vehicle-mounted display system comprises a liquid crystal instrument, and is characterized by comprising the following steps:
s1, receiving a first trigger signal, and pre-starting an operating system and switching on a power supply of the liquid crystal instrument by the vehicle-mounted display system, wherein the pre-starting operating system only comprises an operating system kernel and a loading file;
and S2, receiving a second trigger signal, and controlling the liquid crystal instrument to display a corresponding graphic picture by the vehicle-mounted display system according to the second trigger signal.
2. The method of claim 1, further comprising, between steps S1 and S2:
and S11, timing by the vehicle-mounted display system timer, if the second trigger signal is not received within the preset time T after the first trigger signal is received and no ignition operation is performed, turning off the power supply of the liquid crystal instrument, and if the second trigger signal is received within the preset time T after the first trigger signal is received, jumping to the step S2.
3. The method according to claim 1, wherein the step S2 specifically includes: after receiving the second trigger signal, the vehicle-mounted display system analyzes the second trigger signal to obtain a corresponding control instruction, and a controller of the vehicle-mounted display system sends the control instruction to the graphic processor through the quick response instruction transmission circuit to drive the liquid crystal instrument to display related contents.
4. The method according to claim 3, wherein the quick response command transmission circuit comprises a voltage division filter circuit, an electronic switch and a resistance-capacitance filter circuit which are electrically connected in sequence, wherein an input end of the voltage division filter circuit is connected with an I/O interface of the controller, an output end of the resistance-capacitance filter circuit is connected with the I/O interface of the graphics processor, and a connection node of the electronic switch and the resistance-capacitance filter circuit is connected with a pull-up resistor to the graphics processor power supply.
5. The method of any of claims 1-3, wherein the first trigger signal comprises a fob unlock signal, a door status signal, a mechanical key insertion signal, an emergency warning light signal.
6. A method according to any of claims 1-3, wherein the second trigger signal comprises toggling a combination switch.
7. The control device of the vehicle-mounted display system is characterized by comprising a controller and a graphic processor, wherein the controller is used for signal acquisition, bus communication and instruction control of the vehicle-mounted display system, and the graphic processor is used for signal interaction, picture display and animation driving of the vehicle-mounted display system;
the controller is connected with the graphics processor through a quick response instruction transmission circuit;
the quick response instruction transmission circuit comprises a voltage division filter circuit, an electronic switch and a resistance-capacitance filter circuit which are sequentially and electrically connected, wherein the input end of the voltage division filter circuit is connected with an I/O interface of a controller, the output end of the resistance-capacitance filter circuit is connected with the I/O interface of a graphic processor, and a pull-up resistor is connected to a connection node of the electronic switch and the resistance-capacitance filter circuit and is used for supplying power to the graphic processor.
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| CN112078515A (en) * | 2020-08-05 | 2020-12-15 | 东风电驱动系统有限公司 | TFT screen alarm lamp detection method and system |
| CN112078520A (en) * | 2020-09-11 | 2020-12-15 | 广州小鹏汽车科技有限公司 | Vehicle control method and device |
| CN112116678A (en) * | 2020-08-09 | 2020-12-22 | 东风电驱动系统有限公司 | Irregular virtual pointer display method for liquid crystal instrument and liquid crystal instrument |
| CN115384430A (en) * | 2022-10-31 | 2022-11-25 | 深圳市掌锐电子有限公司 | Starting method and device of automobile instrument display system and storage medium |
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Application publication date: 20200331 |