CN103108038B - Based on the data transmission method of SD equipment complex and system in car networking - Google Patents

Based on the data transmission method of SD equipment complex and system in car networking Download PDF

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Publication number
CN103108038B
CN103108038B CN201310029032.XA CN201310029032A CN103108038B CN 103108038 B CN103108038 B CN 103108038B CN 201310029032 A CN201310029032 A CN 201310029032A CN 103108038 B CN103108038 B CN 103108038B
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data
module
equipment complex
protocol conversion
peripheral hardware
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CN103108038A (en
Inventor
殷建红
周川
张小龙
李玉杰
陈竹明
曾瑞月
林义明
洪杰
王�忠
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Guangdong Ecar Telematics Service Co Ltd
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Guangdong Ecar Telematics Service Co Ltd
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Abstract

The invention discloses in car networking based on the data transmission method of SD equipment complex and system, it comprises in-vehicle navigation apparatus, SD equipment complex, peripheral hardware Miniature Terminal, the mobile phone having bluetooth module and information desk, described in-vehicle navigation apparatus connects SD equipment complex by SDIO interface, described SD equipment complex is connected by 2.4G network with between peripheral hardware Miniature Terminal, described peripheral hardware Miniature Terminal is connected with there being the mobile phone of bluetooth module by blueteeth network, described in have the mobile phone of bluetooth module by GSM network connectivity services platform.Adopt the present invention can get on, be transmitted between cell phone apparatus by GSM, realize easy data interaction between backstage and vehicle mounted guidance needing the modulates information of transmission to become dtmf code to be put into sound channel.

Description

Based on the data transmission method of SD equipment complex and system in car networking
Technical field
The present invention relates to vehicle electric field, based on the data transmission method of dual-tone multifrequency SD equipment complex and system in particular a kind of car networking.
Background technology
In the networking of traditional car.Information communication between backstage and vehicle mounted guidance (car machine) is GPRS passage based on cell phone network and short message channel.These two kinds of modes have two drawbacks, and one is the necessary built-in GSM/GPRS module of vehicle mounted guidance, and with joining a SIM cards of mobile phones, increases hardware cost so on the one hand, and the management of SIM cards of mobile phones also exists very burden on the other hand.Another drawback is, no matter is by GPRS or by short message channel, all can produces extra-pay.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
Based on the data transmission method of SD equipment complex and system in the object of the present invention is to provide a kind of car to network, be intended to solve cost between traditional backstage and vehicle mounted guidance high, manage troublesome problem.
Technical scheme of the present invention is as follows:
Based on the data transmission system of SD equipment complex in a kind of car networking, wherein, comprise in-vehicle navigation apparatus, SD equipment complex, peripheral hardware Miniature Terminal, the mobile phone having bluetooth module and information desk, described in-vehicle navigation apparatus connects SD equipment complex by SDIO interface, described SD equipment complex is connected by 2.4G network with between peripheral hardware Miniature Terminal, described peripheral hardware Miniature Terminal is connected with there being the mobile phone of bluetooth module by blueteeth network, described in have the mobile phone of bluetooth module by GSM network connectivity services platform.
Based on the data transmission system of SD equipment complex in described car networking, wherein, described in-vehicle navigation apparatus comprises the navigation module, middle control module and the SD driver module that are connected successively; Described SD equipment complex comprises SD protocol conversion chip, TF card and a 2.4G wireless chip, the middle control program having mapping module in described TF card and run for described middle control module, described TF card is connected by SDIO interface with SD protocol conversion chip, and described SD protocol conversion chip is connected by RS232 serial ports with a 2.4G wireless chip; Described peripheral hardware Miniature Terminal comprises the 2nd 2.4G wireless chip, MCU and the bluetooth module that are connected successively, and be provided with map software in described mapping module, described middle control program is WINCE.
Based on the data transmission system of SD equipment complex in described car networking, wherein, also be provided with independently PTT service application module, the icon of this application module is independently shown in all display interfaces foremost, when user click the icon of application module time, system first can judge whether map software opens, if do not open, then to spread out the map software, then dial backstage.
Based on the data transmission system of SD equipment complex in described car networking, wherein, the method foremost icon being independently shown in all display interfaces is: in WINDOWS by icon with the display of the form of dialog box Background on a display screen, and this dialog box is set to TOPMOST, and realize start self-starting by edit the registry.
Based on the data transmission system of SD equipment complex in described car networking, wherein, described SD equipment complex is packaged into the contour structures of common SD.
Based on a data transmission method for SD equipment complex in car networking, wherein, when information desk transmission data are to in-vehicle navigation apparatus, concrete steps are as follows:
Step S1: information desk gets on needing the modulates information of transmission to become dtmf code to be put into sound channel, sends to mobile phone by GSM network;
Step S2: mobile phone sends to dtmf code by bluetooth the peripheral hardware Miniature Terminal with bluetooth module;
Step S3: peripheral hardware Miniature Terminal obtains the data message that information desk transmits after making an explanation to dtmf code, and sends to SD equipment complex;
Step S4: in-vehicle navigation apparatus reads the data message that SD equipment complex obtains, and control program in running data message is loaded to mapping module;
Step S5: mapping module completes self-navigation function according to the data message of information desk.
Based on the data transmission method of SD equipment complex in described car networking, wherein, when information desk transmission data are to in-vehicle navigation apparatus, its step S3 idiographic flow is:
Step S31: data are passed to the SD protocol conversion module of SD equipment complex by the 2.4G wireless module of peripheral hardware Miniature Terminal by serial ports;
The state of oneself after receiving the data, can be set to state data memory by step S32:SD protocol conversion module;
Step S3: control the state that program wince reads SD protocol conversion module within a time period in running in middle control module, when central control program wince grabs in SD protocol conversion module and has storing data state, then enter to read the data of SD protocol conversion mould.
Based on the data transmission method of SD equipment complex in described car networking, wherein, when in-vehicle navigation apparatus case information desk sends data, the data transmission method of SD equipment complex is:
Step 1: control the SD protocol conversion module that data can be passed to SD equipment complex by program wince in running in middle control module;
The state of oneself after receiving the data, can be set to state data memory by step 2:SD protocol conversion module;
Step 3: the 2.4G wireless module of peripheral hardware Miniature Terminal reads the state of SD protocol conversion module within a time period, when getting in SD protocol conversion module the data having middle control program wince to give, then the digital independent be temporarily stored in SD protocol conversion module is just walked by 2.4G wireless module.
Based on the data transmission method of SD equipment complex in described car networking, wherein, the method that the SD protocol conversion chip of SD equipment complex realizes changing is: protocol conversion is done in the read-write of SD protocol conversion chip to specific two sectors of memory, a sector is data sector, is all transformed in corresponding I/O device to the data of data sector read-write; Another sector, for controlling sector, configures baud rate and the data format of I/O device by controlling sector.
Based on the data transmission method of SD equipment complex in described car networking, wherein, the concrete grammar that described mapping module completes self-navigation function according to the data message of information desk is: encapsulate the dynamic link library that one group of standard common interface function provides dynamic load, by arranging boot, while system is spread out the map, dynamic link library is loaded in in-vehicle navigation apparatus, concrete grammar is: first the EXENAME of the map software of former car is replaced to another one name, then the execute file name of boot is made into consistent with the filename of original place figure software executable, when client clicks the navigation button of UI program, car machine UI program first will open boot, then boot is spread out the map the executable file of software, and load dynamic link library corresponding to in-vehicle navigation apparatus.
Beneficial effect of the present invention: the present invention is by getting on, being transmitted by GSM between cell phone apparatus needing the modulates information of transmission to become dtmf code to be put into sound channel, realize easy data interaction between backstage and vehicle mounted guidance.
Accompanying drawing explanation
Fig. 1 is system block diagram provided by the invention.
Fig. 2 is method flow diagram provided by the invention.
Embodiment
For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.
See Fig. 1, system provided by the invention comprises in-vehicle navigation apparatus, SD equipment complex, peripheral hardware Miniature Terminal, the mobile phone having bluetooth module and information desk, described in-vehicle navigation apparatus connects SD equipment complex by SDIO interface, described SD equipment complex is connected by 2.4G network with between peripheral hardware Miniature Terminal, described peripheral hardware Miniature Terminal is connected with there being the mobile phone of bluetooth module by blueteeth network, described in have the mobile phone of bluetooth module by GSM network connectivity services platform.
Described in-vehicle navigation apparatus comprises the navigation module, middle control module and the SD driver module that are connected successively; Described SD equipment complex comprises SD protocol conversion chip, TF card and a 2.4G wireless chip, the middle control program having mapping module in described TF card and run for described middle control module, described TF card is connected by SDIO interface with SD protocol conversion chip, and described SD protocol conversion chip is connected by RS232 serial ports with a 2.4G wireless chip; Described peripheral hardware Miniature Terminal comprises the 2nd 2.4G wireless chip, MCU and the bluetooth module that are connected successively.
Described SD equipment complex is packaged into the contour structures of common SD, directly can insert the SD interface of in-vehicle navigation apparatus.
Described 2nd 2.4G wireless chip is connected by RS232 serial ports with between MCU, is connected between MCU with bluetooth module by voice-grade channel.Described Miniature Terminal can be set directly in in-vehicle navigation apparatus.Described middle control program is WINCE, but and in being limited to wince system, as long as the operating system of band SD card driving can use (as windows, linux, unix, android).In described mapping module, map software is installed.
The operating process that a 2.4G wireless chip in SD equipment complex and middle control program wince pass data is mutually as follows: the first step is: 2.4G wireless chip transfers data to middle control program wince, data were passed to SD protocol conversion chip by serial ports by this 2.4G wireless chip before this, now SD protocol conversion chip is accepting after data complete, the state of oneself to be set to state data memory; Second step is: middle control program wince reads the state of SD protocol conversion chip within a time period, when central control program wince grabs in SD protocol conversion chip and has storing data state, then enters to read these data;
In like manner, central control program wince to step during 2.4G wireless chip transmission data is: first, data can pass to SD protocol conversion chip by middle control program wince, and SD protocol conversion chip can give one state data memory; Then, 2.4G wireless chip scanning SD protocol conversion chip controls the data that program wince gives in obtaining.Thus control program wince in realizing to the object of 2.4G wireless chip transmission data.
The present invention is also provided with an independently PTT service application module on the basis of said system, the position that this application module one of resting on car machine screen with the form of an icon is suitable.When user's clickable icon time, first system can judge whether the map software in mapping module opens, if do not opened, then software of spreading out the map, then dials backstage.Be in the most top layer of screen after the start of this icon, user can click this icon at any time, just can dial PTT backstage navigate without the need to software of spreading out the map always, really realizes PTT and navigates.And this icon has suspension characteristic and mobility, also smaller.So the practicality on car machine is also higher.
Described icon is one and is with common bitmap, is presented on car machine display screen in WINDOWS with the form of dialog box Background.Only this dialog box need be set to TOPMOST in WINDOWS just can realize remaining on screen object foremost.And the function of start self-starting can be realized by writing registration table.
See Fig. 2, in the means of communication provided by the invention, the flow process being transmitted data from information desk toward in-vehicle navigation apparatus comprises the following steps:
Step S1: information desk gets on needing the modulates information of transmission to become dtmf code to be put into sound channel, sends to mobile phone by GSM network;
Step S2: mobile phone sends to dtmf code by bluetooth the peripheral hardware Miniature Terminal with bluetooth module;
Step S3: peripheral hardware Miniature Terminal obtains the data message that information desk transmits after making an explanation to dtmf code, and sends to SD equipment complex;
Step S4: in-vehicle navigation apparatus reads the data message that SD equipment complex obtains, and control program in running data message is loaded to mapping module;
Step S5: mapping module completes self-navigation function according to the data message of information desk.
Information desk is got on needing the modulates information of transmission to become dtmf code to be put into sound channel, is transmitted by GSM between cell phone apparatus.This mobile phone be client's mobile phone at ordinary times or zero time a mobile phone using, only need that there is phone functions and BT function.In the process of making a phone call, just data can be sent to the bluetooth equipment of a pairing like this from the bluetooth of user mobile phone at the mobile phone of client.After this bluetooth equipment parses audio frequency, output to the MCU of a band AD interface from a voice-grade channel.MCU obtains the data message that information desk transmits after the dtmf code inside sound is explained.The 2nd 2.4G wireless chip is sent to by RS232 after MCU obtains data message.2nd 2.4G wireless chip transmits a 2.4G wireless chip of SD equipment complex again by 2.4G network.One 2.4G wireless chip sends a SD protocol conversion chip to information again.This SD protocol conversion chip can receive the data from common I/O device, through protocol conversion.Middle control module above the vehicle mounted guidance middle control program run in TF card just can read the data message of this SD protocol conversion chip acquisition by SDIO interface.Just can send mapping module to after middle control program reads information, mapping module just can complete the such thing of similar automatic path planning according to these information.So just reach the object that information desk sends information to navigation software.
This flow process conversely just can the information anti-pass above car machine to information desk to reach two-way communication.In addition, mapping module is arranged in TF card, and owing to there being SD protocol conversion chip, described mapping module can share SDIO interface with common I/O device.The object simultaneously can being accessed map and I/O device by a SDIO interface can be reached like this.
The described object simultaneously can accessing map and I/O device by a SDIO interface is the function completing SD compound chip by SD specification 2.0 agreement of standard.SD compound chip comprises storage card and basic I/O device, the equipment of the I/O interface such as such as RS232, SPI, IIC, USB and ether net is all passable, because described SD protocol conversion chip is the chip with I/O interface such as RS232, SPI, IIC, USB or ether net.
This agreement only needs to utilize USB storage general on existing PC or WINCE equipment or SD card to drive, and just can visit the TF card of standard and the I/O device of a standard by SD interface simultaneously.Thus enormously simplify the design and use of SD equipment complex.The functional specification of SD equipment complex is: adopt standard SD specification 2.0 agreement; Its TF card is 4G to 32G; Read or write speed meets CLASS 6, and reading speed can reach 10M BYTE/second; I/O device can realize RS232, wherein one or several such as SPI, IIC, USB or ether net.
The method that SD protocol conversion chip realizes conversion is: SD protocol conversion chip needs to do protocol conversion to the read-write of specific two sectors.A sector is data sector.The data that this data sector is read and write all are transformed in corresponding I/O device.Another sector is for controlling sector.Sector can be controlled by this and configure I/O device, the baud rate of such as equipment, data format.
There is this protocol conversion, only needed application layer to initiate just can have access to corresponding peripheral hardware to the direct access of these two sectors on an operating system.Because respective drive has mutual exclusion function, do not affect file system and access external memory device simultaneously, so just can reach the arbitrary object simultaneously using I/O device and memory device.
The use of described SD protocol conversion chip is just as card reader.SD card common in the past can only be inserted into computer when a memory device use.But a memory device use can be worked as after the SD equipment complex arranging SD protocol conversion chip inserts, a serial equipment can be worked as again and use.This SD protocol conversion chip is a certain size addressing space before TF card internal memory to I/O device use, and addressing space below continues to use to storage card.Be equivalent to sacrifice a little memory headroom.
In order to the problem of the navigation panel and map software inter-compatibility that realize automatic navigator, the present invention proposes: adopt encapsulation one group of standard common interface function to provide the dynamic load DLL method of (Dynamic-link libraries, dynamic link library).Its principle: encapsulate the DLL required for different automatic navigator platform in this DLL storehouse, as the bridge of communication between map software and automatic navigator, to realize the communication between different map software from different automatic navigator.
The standard common interface function of described encapsulation is the inside being put into ground graph card, does a boot, while spreading out the map, DLL is loaded in system.Its specific practice is: first, the EXENAME of original map software replace, and the executable file of map software is made into another one name; Then, boot is made into map software can to compose a piece of writing with holding the original filename of part.First boot will be opened when car machine UI program starts.It is exactly the executable file of software of spreading out the map that boot completes two actions one, and another one is exactly load corresponding DLL.
Map software adopts the mode of inquiry to detect the DLL storehouse DLL corresponding with automatic navigator, and in map software the DLL of this correspondence of dynamic load, and then call the standard common interface function in DLL, realize the function of different automatic navigator.When such as map software needs to use vocal function, corresponding interface function request automatic navigator can be called and close the stopping sounding such as DVD, MP3.
Automatic navigator transmits windows messaging by DLL to map software, after map software receives message, controls AM/BAM and switches.Such as automatic navigator requires that map software realizes arranging navigation volume, and the functions such as navigation are closed in request.
Because versatility DLL adopts standard common interface function, and any automatic navigator company and map software company also can adopt the disclosure standard common interface function.As long as so automatic navigator company and navigation software have employed this standard interface function to realize DLL.User do not need consider automatic navigator use which map software and the navigation panel problem of automatic navigator.User arbitrarily buys any map software and any automatic navigator, can solve compatibility issue by loading DLL.Universal like this DLL can solve compatibling problem between different automatic navigator and map software, can ensure that Navigator normally runs on automatic navigator.
The present invention is by getting on, being transmitted by GSM between cell phone apparatus needing the modulates information of transmission to become dtmf code to be put into sound channel, realize easy data interaction between backstage and vehicle mounted guidance.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to claims of the present invention.

Claims (8)

1. in car networking based on the data transmission system of SD equipment complex, it is characterized in that, comprise in-vehicle navigation apparatus, SD equipment complex, peripheral hardware Miniature Terminal, the mobile phone having bluetooth module and information desk, described in-vehicle navigation apparatus connects SD equipment complex by SDIO interface, described SD equipment complex is connected by 2.4G network with between peripheral hardware Miniature Terminal, described peripheral hardware Miniature Terminal is connected with there being the mobile phone of bluetooth module by blueteeth network, described in have the mobile phone of bluetooth module by GSM network connectivity services platform; Described in-vehicle navigation apparatus comprises the navigation module, middle control module and the SD driver module that are connected successively; Described SD equipment complex comprises SD protocol conversion chip, TF card and a 2.4G wireless chip, the middle control program having mapping module in described TF card and run for described middle control module, described TF card is connected by SDIO interface with SD protocol conversion chip, and described SD protocol conversion chip is connected by RS232 serial ports with a 2.4G wireless chip; Described peripheral hardware Miniature Terminal comprises the 2nd 2.4G wireless chip, MCU and the bluetooth module that are connected successively, is provided with map software in described mapping module, and described middle control program is the operating system that band SD card drives.
2. in car according to claim 1 networking based on the data transmission system of SD equipment complex, it is characterized in that, also be provided with independently PTT service application module, the icon of this application module is independently shown in all display interfaces foremost, when user click the icon of application module time, system first can judge whether map software opens, if do not open, then to spread out the map software, then dial backstage.
3. in car according to claim 2 networking based on the data transmission system of SD equipment complex, it is characterized in that, the method foremost icon being independently shown in all display interfaces is: in WINDOWS by icon with the display of the form of dialog box Background on a display screen, and this dialog box is set to TOPMOST, and realize start self-starting by edit the registry.
4. in car according to claim 1 networking based on the data transmission system of SD equipment complex, it is characterized in that, described SD equipment complex is packaged into the contour structures of common SD.
5. in car networking based on the data transmission method of SD equipment complex, it is characterized in that, when information desk transmission data are to in-vehicle navigation apparatus, concrete steps are as follows:
Step S1: information desk gets on needing the modulates information of transmission to become dtmf code to be put into sound channel, sends to mobile phone by GSM network;
Step S2: mobile phone sends to dtmf code by bluetooth the peripheral hardware Miniature Terminal with bluetooth module;
Step S3: peripheral hardware Miniature Terminal obtains the data message that information desk transmits after making an explanation to dtmf code, and sends to SD equipment complex;
Step S4: in-vehicle navigation apparatus reads the data message that SD equipment complex obtains, and control program in running data message is loaded to mapping module;
Step S5: mapping module completes self-navigation function according to the data message of information desk;
Wherein, when information desk transmission data are to in-vehicle navigation apparatus, its step S3 idiographic flow is:
Step S31: data are passed to the SD protocol conversion module of SD equipment complex by the 2.4G wireless module of peripheral hardware Miniature Terminal by serial ports;
The state of oneself after receiving the data, can be set to state data memory by step S32:SD protocol conversion module;
Step S3: control the state that program wince reads SD protocol conversion module within a time period in running in middle control module, when central control program wince grabs in SD protocol conversion module and has storing data state, then enter to read the data of SD protocol conversion mould.
6. in car according to claim 5 networking based on the data transmission method of SD equipment complex, it is characterized in that, when in-vehicle navigation apparatus case information desk sends data, the data transmission method of SD equipment complex is:
Step 1: control the SD protocol conversion module that data can be passed to SD equipment complex by program wince in running in middle control module;
The state of oneself after receiving the data, can be set to state data memory by step 2:SD protocol conversion module;
Step 3: the 2.4G wireless module of peripheral hardware Miniature Terminal reads the state of SD protocol conversion module within a time period, when getting in SD protocol conversion module the data having middle control program wince to give, then the digital independent be temporarily stored in SD protocol conversion module is just walked by 2.4G wireless module.
7. based on the data transmission method of SD equipment complex in the car networking according to claim 5 or 6, it is characterized in that, the method that the SD protocol conversion chip of SD equipment complex realizes changing is: protocol conversion is done in the read-write of SD protocol conversion chip to specific two sectors of memory, a sector is data sector, is all transformed in corresponding I/O device to the data of data sector read-write; Another sector, for controlling sector, configures baud rate and the data format of I/O device by controlling sector.
8. in car according to claim 5 networking based on the data transmission method of SD equipment complex, it is characterized in that, the concrete grammar that described mapping module completes self-navigation function according to the data message of information desk is: encapsulate the dynamic link library that one group of standard common interface function provides dynamic load, by arranging boot, while system is spread out the map, dynamic link library is loaded in in-vehicle navigation apparatus, concrete grammar is: first the EXENAME of the map software of former car is replaced to another one name, then the execute file name of boot is made into consistent with the filename of original place figure software executable, when client clicks the navigation button of UI program, car machine UI program first will open boot, then boot is spread out the map the executable file of software, and load dynamic link library corresponding to in-vehicle navigation apparatus.
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