CN104572564A - Method for realizing communication of Android mobile equipment and USB OTG (On-The-Go) host computer - Google Patents
Method for realizing communication of Android mobile equipment and USB OTG (On-The-Go) host computer Download PDFInfo
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- CN104572564A CN104572564A CN201510016220.8A CN201510016220A CN104572564A CN 104572564 A CN104572564 A CN 104572564A CN 201510016220 A CN201510016220 A CN 201510016220A CN 104572564 A CN104572564 A CN 104572564A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
- G06F13/4286—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus using a handshaking protocol, e.g. RS232C link
Abstract
The invention discloses a method for realizing communication of Android mobile equipment and an USB OTG (On-The-Go) host computer; with the combination of an Android Open Accessory Protocol and an Android Debug Bridge interface protocol, the OTG connecting manner supported by mobile phones is judged in a firmware program and the corresponding protocol is chosen to be connected according to the judging result. The scheme is capable of covering all Android mobile phones in the market, and the electrification requirement on external equipment is reduced.
Description
Technical field
The present invention relates to mobile device mechanics of communication, be specifically related to the technology of android mobile device and USB OTG host communication.
Background technology
Due to the rise of Mobile Market, present people are becoming more and more various to the usability of mobile phone and security requirement, the external unit of some specialties not only can utilize the portability of mobile phone to promote its usage space, more can meet the security needs of user, the market outlook of its mobile phone peripheral hardware are very wide.Along with the continuous upgrading of mobile phone is progressive, peripheral hardware and mobile phone can not need to be connected by pc, but directly can carry out wired and wireless connection, realize the object of communication.
Android mobile phone has had at present supports that the mobile phone as OTG main equipment occurs, but from evolution, former most of mobile phone is subject to the restriction of power supply, still can only support mobile phone as OTG from equipment,
After determining USB scheme, existing two kinds of the USB scheme of discovery Android of being not difficult:
One, by the Android Debug Bridge debugging interface of Android system, use the tcp forward function of its ADB daemon, the master-slave equipment communication based on tcp socket can be realized.
The benefit of ADB scheme has:
1, ADB damon program is primary with Android system, therefore in theory.As long as Android system, all there is ADB program, as long as user opens debugging interface, can start ADB daemon process, now namely peripheral hardware sets up communication with it by tcp socket.
2, ADB is also that communication is relatively simple by tcp communication between the app of upper strata.
But ADB scheme is relatively good for the support of comparing early version (less than 4.0), for more than 4.2.2 version, support that cannot be reliable and stable.Android is proposed secure adb and carries out RSA signature to main equipment for this reason, remarkable to the performance requirement of hardware owing to generating RSA secret key pair and carrying out rsa encryption, therefore not easily realizes for peripheral hardware.
Two, the Android Open Accessory Protocol agreement provided by android 3.1 version is connected.AOA agreement is the new peripheral hardware agreement that android introduces on 3.1 versions, and this agreement supported by the built-in jar bag of more than 3.1 version, for 2.3.6-3.0 version, add-on lib can be provided to support.
The benefit of AOA scheme is used to have:
1, AOA primary support more than android3.1 version;
2, application api layer provides usb.accessory API external member, writes app and carrys out administrative standard peripheral hardware and become very easy;
3, xml-filter setting can be carried out to app, after Android system has detected the access of AOA peripheral hardware, the app that meeting automatic search has been installed, if the match is successful, automatically starting app; If do not find coupling, the URL that peripheral hardware is arranged can be opened, guide user to go to website to download corresponding app.
As from the foregoing, existing ADB scheme and AOA scheme are all merely able to the Android system mobile device of compatible respective version, cannot realize the support to all android mobile devices.
Summary of the invention
For the problem between existing android mobile device and USB OTG main frame existing for communication, the object of the present invention is to provide a kind of can the USB OTG host communication scheme of compatible all android mobile devices.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of method realizing android mobile device and USB OTG host communication, described method merges Android Open Accessory Protocol agreement and Android Debug Bridge interface protocol in firmware program, and the OTG connected mode that intelligent decision mobile phone is supported in firmware program, select corresponding agreement to connect according to judged result.
In the preferred version of this programme, in the connected mode of application program according to Android Open Accessory Protocol agreement and the built-in formation support of Android Debug Bridge interface protocol two kinds of connection protocols in described method.
Further, the process of described firmware program connection USB OTG main frame is as follows:
(1), after equipment access, firmware program is initiated USB and is connected, and enumerates USB descriptor;
(2) complete after USB enumerates, initiate AOA agreement and connect, attempt opening accessory mode pattern, if open failure, extend the reset time, and repeated attempt;
(3) attempt unsuccessfully all, reset equipment, then initiate ADB by ADB agreement and connect, instruct successful connection.
Further, the process of described application program connection USB OTG main frame is as follows:
(11), after application program launching, the accessory class list of AOA agreement is first obtained by usb.usbmanager, if mobile phone firmware program can support AOA agreement, then this List shows, i.e. accessory class list, in comprise effective device id, can directly be communicated by ID;
(12) if List table is for empty, then set up socket server and listening port, wait for that the socket of adbd connects.
This programme is by the judgement of firmware to equipment, intelligent selection two kinds of connected modes can carry out OTG and connect and to go forward side by side the news that work, the compatible to greatest extent diversity of android equipment, and because android4.2 equipment needs to carry out RSA authentication, need great computing requirement, therefore adopt AOA agreement to evade authentication operations, decrease the requirement of equipment to external world.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, setting forth the present invention further below.
The present invention is in order to realize support maximization to Android and connection reliability, AOA agreement and ADB interface protocol merge by the present invention in firmware program, and the OTG connected mode that intelligent decision mobile phone is supported in firmware program, select corresponding agreement to connect according to judged result.
Thus, this firmware program realizes mobile phone to connect the process of USB OTG equipment as follows:
A () equipment starts to carry out USB device enumeration process after inserting;
B () has enumerated after, first carry out the connection of AOA agreement;
If (c) connection failure, is set, restarting equipment the reset time, carries out maximum 3 times and attempt;
If (d) successful connection, start to communicate with AOA agreement; If unsuccessful, then continue;
E () starts ADB and connects, send host request;
If (f) successful connection, start communication with ADB agreement; If unsuccessful, then connection failure.
For general application program of mobile phone (APP), based on the scheme that above-mentioned AOA agreement and ADB interface protocol merge, the connected mode of built-in formation support two kinds of connection protocols in the application.
Accordingly, the process of application program connection USB OTG equipment is as follows:
A () is when the equipment insertion mobile phone meeting AOA agreement, the Android system run on mobile phone automatically will identify and starts corresponding application, initialization section in APP, first be connected with peripheral hardware by newly-built UsbAccessory object, if successful connection, then communicated by Usb Accessory object;
If b () connects unsuccessful, then attempt ADB and connect, by the forwarding capability of ADB, set up socket client end, port 4567, socket is initiated to server and connects; If successful connection, then ADB Path Setup, uses socket communication;
If c () socket sets up time-out (as more than 20 seconds), then agreement is not supported, returns connection failure.
Based on above-mentioned two schemes, Android mobile phone equipment all on the market can be covered, and also reduce the electrified requirement to peripheral hardware.
When specific implementation, in order to realize the full compatibility to Android series mobile phone, can choose MCU external equipment as OTG master, mobile phone is as the scheme from equipment.When connecting, comprising firmware program connection and being connected two kinds with application program.
Wherein, the process of firmware program connection USB OTG main frame is as follows:
(1) after equipment access, firmware program detects that equipment initiates USB connection after inserting signal immediately, enumerate USB descriptor, specifically comprise device descriptor, configuration descriptor, interface descriptor and endpoint descriptor, descriptor here refers to the information characteristics of equipment.
(2) complete after USB enumerates, initiate AOA agreement and connect, attempt opening accessory mode pattern, if open failure, extend the reset time, and repeated attempt.
The detailed process that this step carries out the connection of AOA agreement is as follows:
(21) first judge whether mobile phone is in accessory pattern: if then can directly communicate; If not, continue;
(22) send getProtocol instruction, obtain the version information of hardware supported;
(23) send getInfo instruction, obtain hardware equipment information, as: manufacturer name, model name, description, version, URI, serial number etc.;
(24) startup instruction is sent, the accessory pattern Activated Phone;
(25) after having activated, check whether mobile phone is in accessory pattern, and concrete mode can be: check whether mobile phone PID whether be 0x2D00 or 0x2D01, VID is googleID:0x18D1;
(26) attempt opening accessory mode pattern, if open failure, extend the reset time, this reset time refers to usb bus reset time, and repeated attempt, forward step a to.
(3) attempt unsuccessfully all, reset equipment, then initiate ADB by ADB agreement and connect, instruct successful connection.
This step realize ADB connect time, by firmware program set up a port be the socket server of 4567 to accept the connection request of client in APP, concrete steps are as follows:
A () MCU first sends host connect request to mobile phone, if mobile phone has returned connect device signal, then established ADB and connect;
B () then main frame opens the port of 4567, mobile phone terminal can return the signal of an OK;
C () successful connection, waits for that client holds connect request.
Based on such scheme, after completing firmware program connection USB OTG main frame, the process that the application program run in mobile phone connects USB OTG main frame is as follows:
(11) after application program launching, first obtained the accessory class list of AOA agreement by usb.usbmanager, if mobile phone firmware program can support AOA agreement, then this List comprises effective device id in showing, and can directly be communicated by ID.
In this step, when obtaining accessory class list, due to the peripheral hardware list being connected to the AOA agreement of mobile phone having interface to get in com.android.usb.usbmanager bag, this list contains all AOA equipment being currently connected to mobile phone, get this list, can by UsbAccessory object to operate.
In this step, mobile phone firmware program, by sending getProtocol order, gets the AOA version of current connection devices support according to the form of getProtocol order.
Here need to illustrate, List table is for the aforementioned accessory class list got by usbmanager, and it is expressed as a List list in app.Here device id is ProductID, is generally 0x2D00 or 0x2D01, namely represents that this equipment has entered accessory pattern; If the equipment entering accessory pattern can carry out the input and output of flow data by instream and the outstream member object in usbAccessory object.
(12) if List table is for empty, then set up socket server and listening port, wait for that the socket of adbd connects.
In this step, determine whether List table is empty by calling List.size () function, if be 0, represent empty, now illustrate do not have AOA equipment, the socker mode by ADB attempts connecting by next step.
Wherein, set up listening port and completed by APP code, set up the server of 4567 by socket standard A PI, and monitor the client request whether having and be connected to port 4567, this request is sent by adbd.
Here adbd is android debug bridge deamon, is that program is garrisoned in the built-in debugging of Android mobile phone, and namely its start starts and in memory-resident, be responsible for operating mobile phone.
Visible, this programme, by the judgement of firmware to equipment, intelligent selection two kinds of connected modes can carry out OTG and connects and to go forward side by side the news that work, to greatest extent the compatibility diversity of android equipment; Adopt AOA agreement to evade authentication operations simultaneously, decrease the requirement of equipment to external world.
More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (4)
1. one kind realizes the method for android mobile device and USB OTG host communication, it is characterized in that, described method merges Android Open Accessory Protocol agreement and AndroidDebug Bridge interface protocol in firmware program, and the OTG connected mode that intelligent decision mobile phone is supported in firmware program, select corresponding agreement to connect according to judged result.
2. a kind of method realizing android mobile device and USB OTG host communication according to claim 1, it is characterized in that, in the connected mode of application program according to Android Open AccessoryProtocol agreement and the built-in formation support of Android Debug Bridge interface protocol two kinds of connection protocols in described method.
3. a kind of method realizing android mobile device and USB OTG host communication according to claim 1, is characterized in that, the process that described firmware program connects USB OTG main frame is as follows:
(1), after equipment access, firmware program is initiated USB and is connected, and enumerates USB descriptor;
(2) complete after USB enumerates, initiate AOA agreement and connect, attempt opening accessory mode pattern, if open failure, extend the reset time, and repeated attempt;
(3) attempt unsuccessfully all, reset equipment, then initiate ADB by ADB agreement and connect, instruct successful connection.
4. a kind of method realizing android mobile device and USB OTG host communication according to claim 2, is characterized in that, the process that described application program connects USB OTG main frame is as follows:
(11), after application program launching, the accessory class list of AOA agreement is first obtained by usb.usbmanager, if mobile phone firmware program can support AOA agreement, then this List shows, i.e. accessory class list, in comprise effective device id, can directly be communicated by ID;
(12) if List table is for empty, then set up socket server and listening port, wait for that the socket of adbd connects.
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Cited By (12)
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| CN105182111A (en) * | 2015-08-17 | 2015-12-23 | 上海斐讯数据通信技术有限公司 | Mobile terminal performance test method and system |
| CN106357607A (en) * | 2016-07-20 | 2017-01-25 | 北京海誉动想科技股份有限公司 | Method and device for connection, security verification, communication, communication monitoring of electronic equipment |
| WO2017185694A1 (en) * | 2016-04-29 | 2017-11-02 | 乐视控股（北京）有限公司 | Electronic device, and method for providing data for another directly connected electronic device |
| CN107450947A (en) * | 2017-07-26 | 2017-12-08 | 北京疯景科技有限公司 | Start the method and device of application |
| CN107483696A (en) * | 2017-07-12 | 2017-12-15 | 武汉卡比特信息有限公司 | A kind of mobile phone and the communication means and system of computer equipment |
| CN107783930A (en) * | 2016-08-29 | 2018-03-09 | 现代自动车株式会社 | Usb communication control method for USB annexes |
| CN108259652A (en) * | 2016-12-28 | 2018-07-06 | 上海大唐移动通信设备有限公司 | A kind of terminal dials the method and device of voice and video test |
| CN108733607A (en) * | 2017-04-25 | 2018-11-02 | 中国移动通信集团公司 | A kind of connection communication method and apparatus |
| CN109150926A (en) * | 2018-11-19 | 2019-01-04 | 炬星科技（深圳）有限公司 | A kind of data communications method and man-machine interactive system |
| TWI677789B (en) * | 2018-07-06 | 2019-11-21 | 英研智能移動股份有限公司 | Peripheral hardware operating method and system |
| CN110688161A (en) * | 2018-07-06 | 2020-01-14 | 英研智能移动股份有限公司 | Peripheral hardware operation method and system |
| CN114936175A (en) * | 2022-07-21 | 2022-08-23 | 飞天诚信科技股份有限公司 | Method, device, terminal equipment and medium for realizing OTG communication without plugging |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105182111A (en) * | 2015-08-17 | 2015-12-23 | 上海斐讯数据通信技术有限公司 | Mobile terminal performance test method and system |
| WO2017185694A1 (en) * | 2016-04-29 | 2017-11-02 | 乐视控股（北京）有限公司 | Electronic device, and method for providing data for another directly connected electronic device |
| CN106357607A (en) * | 2016-07-20 | 2017-01-25 | 北京海誉动想科技股份有限公司 | Method and device for connection, security verification, communication, communication monitoring of electronic equipment |
| CN107783930B (en) * | 2016-08-29 | 2022-05-17 | 现代自动车株式会社 | USB communication control method for USB accessory |
| CN107783930A (en) * | 2016-08-29 | 2018-03-09 | 现代自动车株式会社 | Usb communication control method for USB annexes |
| CN108259652A (en) * | 2016-12-28 | 2018-07-06 | 上海大唐移动通信设备有限公司 | A kind of terminal dials the method and device of voice and video test |
| CN108733607B (en) * | 2017-04-25 | 2022-04-01 | 中国移动通信集团公司 | Connection communication method and device |
| CN108733607A (en) * | 2017-04-25 | 2018-11-02 | 中国移动通信集团公司 | A kind of connection communication method and apparatus |
| CN107483696A (en) * | 2017-07-12 | 2017-12-15 | 武汉卡比特信息有限公司 | A kind of mobile phone and the communication means and system of computer equipment |
| CN107483696B (en) * | 2017-07-12 | 2019-11-22 | 武汉卡比特信息有限公司 | A kind of communication means and system of mobile phone and computer equipment |
| CN107450947A (en) * | 2017-07-26 | 2017-12-08 | 北京疯景科技有限公司 | Start the method and device of application |
| TWI677789B (en) * | 2018-07-06 | 2019-11-21 | 英研智能移動股份有限公司 | Peripheral hardware operating method and system |
| CN110688161A (en) * | 2018-07-06 | 2020-01-14 | 英研智能移动股份有限公司 | Peripheral hardware operation method and system |
| CN109150926A (en) * | 2018-11-19 | 2019-01-04 | 炬星科技（深圳）有限公司 | A kind of data communications method and man-machine interactive system |
| CN114936175A (en) * | 2022-07-21 | 2022-08-23 | 飞天诚信科技股份有限公司 | Method, device, terminal equipment and medium for realizing OTG communication without plugging |
| CN114936175B (en) * | 2022-07-21 | 2022-10-04 | 飞天诚信科技股份有限公司 | Method, device, terminal equipment and medium for realizing OTG communication without plugging |
| WO2024016810A1 (en) * | 2022-07-21 | 2024-01-25 | 飞天诚信科技股份有限公司 | Method and apparatus for implementing otg communication without plugging, terminal device, and medium |
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