CN111176854B - Method and system for synchronizing exit of Carplay - Google Patents
Method and system for synchronizing exit of Carplay Download PDFInfo
- Publication number
- CN111176854B CN111176854B CN201911151894.3A CN201911151894A CN111176854B CN 111176854 B CN111176854 B CN 111176854B CN 201911151894 A CN201911151894 A CN 201911151894A CN 111176854 B CN111176854 B CN 111176854B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 35
- 230000003111 delayed effect Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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
- G06F9/46—Multiprogramming arrangements
- G06F9/52—Program synchronisation; Mutual exclusion, e.g. by means of semaphores
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- Engineering & Computer Science (AREA)
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- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
- Telephone Function (AREA)
Abstract
The invention provides a method and a system for the synchronization of the escape of a Carplay, which are mainly improved based on the prior read-write. Therefore, the technical problems that the communication equipment is unreliable to pull out due to overtime judgment of read-write data and the requirement of exiting a Carplay session within 500ms cannot be met due to overlong overtime time of the read-write data are solved.
Description
Technical Field
The invention relates to a vehicle-mounted information entertainment system, in particular to a method and a system for synchronizing the exit of a Carplay.
Background
With the continuous development of vehicle-mounted entertainment systems, more and more applications related to vehicle-mounted usb interconnection are required, in the design flow of the vehicle-mounted usb connection, after the mobile phone is pulled out, the exit of the vehicle-mounted usb connection must be within 500ms, but when the mobile phone is pulled out, the vehicle Service does not know that only the read-write data is overtime, and then the exit of the vehicle is judged by the error of the read-write overtime, but in the using process of the vehicle, the vehicle is quite normal, so that the mobile phone is judged to be unreliable according to the read-write overtime, and a new reliable and stable method for judging the iPhone is required to be found.
Disclosure of Invention
The invention provides a method and a system for synchronizing the card play exit, aiming at solving the technical problems that the read-write data overtime judgment is unreliable in extracting an iPhone mobile phone and the read-write data overtime time is too long to cause that the requirement of exiting the card play session within 500ms cannot be met.
A method for synchronizing exit of a Carplay, comprising the steps of:
after the communication equipment is connected with the USB interface, the enumeration equipment is started.
And starting a USB state detection program, and enabling the USB of the vehicle to enter a suspend state after a preset time.
When the USB of the vehicle machine enters a Default state or an address state, detecting after reaching a time threshold, reading the USB state, judging whether the USB state is a delayed state, if so, sending a REMOVE event, and informing the card Service that the communication equipment is pulled out; otherwise, executing the step (d).
When the USB of the vehicle is in a Configured state, connection of the communication equipment and the Carplay is completed, a Carplay session is started, a USB data reading state is entered until the USB of the vehicle is detected to enter a suspend state, a REMOVE event is sent out, and the Carplay Service is notified that the communication equipment is pulled out.
Preferably, the time threshold is a preset time value, and the time value is 500ms.
Further, notification of the Carplay Service is through a driver UDEV event notification Service.
Preferably, the Service receives notification within 100 ms.
Further, the communication device also comprises a prompt notification information dialog box visually presented at the communication device end.
As another preferred embodiment, the present invention further provides a system for card play out synchronization, including:
and the initialization unit is used for starting to enumerate the equipment after the communication equipment is connected with the USB interface.
And a detection unit: the USB state detection program is used for starting the USB state detection program, and after a preset time, the USB of the vehicle enters a suspend state.
A state judgment unit: and the device is used for matching the working mode according to the detected current state, starting to detect when the USB of the vehicle enters a Default state or an address state, reading the USB state after reaching a time threshold, judging whether the USB state is a delayed state, if so, sending a REMOVE event, and notifying the card Service that the communication equipment is pulled out.
A data reading unit: when the USB of the vehicle is in the Configured state, the connection between the communication equipment and the Carplay is completed, the Carplay session is started, the USB data reading state is entered until the USB of the vehicle is detected to enter the suspend state, a REMOVE event is sent out, and the Carplay Service is notified that the communication equipment is pulled out.
Preferably, the time value is 500ms.
Further, notification of the Carplay Service is through a driver UDEV event notification Service.
Preferably, the Service receives notification within 100 ms.
Further, the communication device also comprises a prompt notification information dialog box visually presented at the communication device end.
The invention provides a method and a system for exiting synchronization of a Carplay, which are mainly based on the improvement of the prior read-write, the prior data connection is mainly based on the read-write timeout to judge whether the connection between a communication device and the Carplay is successful or not, in order to solve the technical problems that the judgment is inaccurate and the requirement of exiting the Carplay session within 500ms cannot be met. The method and the system of the invention are used for judging the data connection state between the communication equipment and the Carplay, and the preset time value of 500ms is used for high-precision control, thereby effectively ensuring the accuracy and the high efficiency of judging the connection state of the USB when mobile equipment such as a mobile phone and the like is connected with the vehicle-mounted entertainment system.
Drawings
FIG. 1 is a flowchart of a method for performing a card play out synchronization according to an embodiment.
FIG. 2 is a schematic diagram of a system for the synchronization of the card play exit in an embodiment.
Detailed Description
The method and system for the synchronization of the Carplay exit of the present invention will be described in further detail with reference to the following embodiments and the accompanying drawings.
In a preferred embodiment, as shown in fig. 1, the core of the present invention is to redesign the method according to the connection flow of the Carplay and the change of the USB state machine during the connection, and further use the UDEV method to determine that the iPhone has been pulled out from the driver layer, and then send a REMOVE event notification Service, and exit the Carplay session after receiving the notification. The method specifically comprises the following steps.
a. After the iPhone mobile enumerates the car, the USB state detection program is started, and the car can enter a suspend state for a period of time.
b. The USB of the vehicle is in a Default state, the detection is delayed for 500ms, the USB state is read, if the USB state is the suspend, a REMOVE event is sent out, and the card Service is notified, and the iPhone mobile phone is pulled out.
c. The USB of the vehicle is in an advanced state, the detection is delayed for 500ms, the USB state is read, if the USB state is in a delayed state, a REMOVE event is sent out, and the card Service is notified, and the iPhone mobile phone is pulled out.
d. The USB of the car machine enters a Configured state, which indicates that the car machine is successfully connected with the card, the USB state is directly read, if the car machine is in a suspend state, a REMOVE event is sent out, and the card Service is notified, and the iPhone mobile phone is pulled out.
e. And (3) pulling out the mobile phone, directly reading the USB state, and if the mobile phone is in a suspend state, sending a REMOVE event to inform the Carplay Service that the iPhone mobile phone is pulled out.
Preferably, the Service receives notification within 100 ms.
Further, the communication device also comprises a prompt notification information dialog box visually presented at the communication device end.
As another embodiment of the invention, the invention also provides a system for the synchronization of the card play exit, which comprises the following parts.
And the initialization unit is used for starting to enumerate the equipment after the communication equipment is connected with the USB interface.
And a detection unit: the USB state detection program is used for starting the USB state detection program, and after a preset time, the USB of the vehicle enters a suspend state.
A state judgment unit: and the device is used for matching the working mode according to the detected current state, starting to detect when the USB of the vehicle enters a Default state or an address state, reading the USB state after reaching a time threshold, judging whether the USB state is a delayed state, if so, sending a REMOVE event, and notifying the card Service that the communication equipment is pulled out.
A data reading unit: when the USB of the vehicle is in the Configured state, the connection between the communication equipment and the Carplay is completed, the Carplay session is started, the USB data reading state is entered until the USB of the vehicle is detected to enter the suspend state, a REMOVE event is sent out, and the Carplay Service is notified that the communication equipment is pulled out.
Preferably, the time value is 500ms.
Further, notification of the Carplay Service is through a driver UDEV event notification Service.
Preferably, the Service receives notification within 100 ms.
Further, the communication device also comprises a prompt notification information dialog box visually presented at the communication device end.
In the embodiment of the present invention, the communication device is preferably one or more mobile communication devices such as an iPhone phone and an ipad, but is not limited thereto.
In summary, the method and system for synchronizing the card play exit provided by the invention detect the USB of the vehicle in the Default state, the address state, and the Configured state respectively, and determine whether the USB is a suspend, and further send a REMOVE event by using a UDEV manner, notify the real-time connection condition of the card play Service and the iPhone phone, and feed back the request to the user through a message prompt dialog box. The invention can meet the requirement of exiting the Carplay session within 500ms, also solves the technical problem of unreliable judgment of the iPhone mobile phone extraction only by overtime of read-write data in the prior art, realizes accurate detection and judgment of the connection condition between the iPhone mobile phone and the Carplay, and greatly improves the technical effect of untimely feedback of the data read-write state.
While the invention has been described in conjunction with the specific embodiments above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, all such alternatives, modifications, and variations are included within the spirit and scope of the following claims.
Claims (9)
1. A method for synchronizing exit of a Carplay, comprising the steps of:
after the communication equipment is connected with the USB interface, starting to enumerate the equipment;
starting a USB state detection program, and enabling the USB of the vehicle to enter a suspend state after a preset time;
when the USB of the vehicle machine enters a Default state or an address state, detecting after reaching a time threshold, reading the USB state, judging whether the USB state is a delayed state, if yes, judging that the communication equipment is pulled out from a driving layer, sending a REMOVE event, and notifying the Carplay Service through driving the UDEV event, wherein the communication equipment is pulled out; otherwise, the USB of the vehicle machine enters a Configured state;
when the USB of the vehicle is in a Configured state, connection of the communication equipment and the Carplay is completed, a Carplay session is started, a USB data reading state is entered until the USB of the vehicle is detected to enter a suspend state, a REMOVE event is sent out, and the Carplay Service is notified that the communication equipment is pulled out.
2. The method of claim 1, wherein the time threshold is a preset time value, the time value being 500ms.
3. The method of claim 1, wherein the Service receives notification within 100 ms.
4. The method of claim 3, further comprising a prompt notification dialog visually presented at the communication device.
5. A system for card play out synchronization comprising the following:
the initialization unit is used for starting to enumerate equipment after the communication equipment is connected with the USB interface;
the detection unit is used for starting a USB state detection program, and after a preset time, the USB of the vehicle machine enters a suspend state;
the state judging unit is used for matching the working modes according to the detected current state, starting to detect when the USB of the vehicle enters a Default state or an address state, reading the USB state, judging whether the USB state is a suspend or not, if so, sending a REMOVE event, notifying the Carplay Service, and extracting the communication equipment;
and the data reading unit is used for starting a Carplay session when the USB of the vehicle is in a Configured state, completing the connection between the communication equipment and the Carplay, and entering a USB data reading state until the USB of the vehicle is detected to be in a suspend state, sending a REMOVE event to inform the Carplay Service that the communication equipment is pulled out.
6. The system of claim 5, wherein the time threshold is a preset time value, the time value being 500ms.
7. The system of claim 5, wherein notification of the carrlay Service is through a drive UDEV event notification Service.
8. The system of claim 7, wherein the Service receives notification within 100 ms.
9. The system of claim 8, further comprising a prompt notification dialog visually presented at the communication device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911151894.3A CN111176854B (en) | 2019-11-22 | 2019-11-22 | Method and system for synchronizing exit of Carplay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911151894.3A CN111176854B (en) | 2019-11-22 | 2019-11-22 | Method and system for synchronizing exit of Carplay |
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| Publication Number | Publication Date |
|---|---|
| CN111176854A CN111176854A (en) | 2020-05-19 |
| CN111176854B true CN111176854B (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911151894.3A Active CN111176854B (en) | 2019-11-22 | 2019-11-22 | Method and system for synchronizing exit of Carplay |
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| CN101261607A (en) * | 2008-01-24 | 2008-09-10 | 北京飞天诚信科技有限公司 | Overtime self-closing portable USB device and method |
| CN104734979A (en) * | 2015-04-07 | 2015-06-24 | 北京极科极客科技有限公司 | Control method for storage device externally connected with router |
| CN105573939A (en) * | 2014-10-10 | 2016-05-11 | 深圳市中兴微电子技术有限公司 | Method for carrying out data transmission on the basis of universal serial bus, and terminal |
| CN105760328A (en) * | 2016-02-03 | 2016-07-13 | 深圳多哚新技术有限责任公司 | USB master and slave switching method and system for VR device |
| CN110381027A (en) * | 2019-06-17 | 2019-10-25 | 深圳市点嘀互联网络有限公司 | Embedded device carries the device and method that carplay agreement connects vehicle device by USB |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4724187B2 (en) * | 2008-01-22 | 2011-07-13 | レノボ・シンガポール・プライベート・リミテッド | Method and computer for accessing externally connected external storage device |
-
2019
- 2019-11-22 CN CN201911151894.3A patent/CN111176854B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261607A (en) * | 2008-01-24 | 2008-09-10 | 北京飞天诚信科技有限公司 | Overtime self-closing portable USB device and method |
| CN105573939A (en) * | 2014-10-10 | 2016-05-11 | 深圳市中兴微电子技术有限公司 | Method for carrying out data transmission on the basis of universal serial bus, and terminal |
| CN104734979A (en) * | 2015-04-07 | 2015-06-24 | 北京极科极客科技有限公司 | Control method for storage device externally connected with router |
| CN105760328A (en) * | 2016-02-03 | 2016-07-13 | 深圳多哚新技术有限责任公司 | USB master and slave switching method and system for VR device |
| CN110381027A (en) * | 2019-06-17 | 2019-10-25 | 深圳市点嘀互联网络有限公司 | Embedded device carries the device and method that carplay agreement connects vehicle device by USB |
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| Publication number | Publication date |
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| CN111176854A (en) | 2020-05-19 |
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