CN102722122A - System and method for displaying or controlling automobiles by CAN (controller area network) bus - Google Patents
System and method for displaying or controlling automobiles by CAN (controller area network) bus Download PDFInfo
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- CN102722122A CN102722122A CN2012102024162A CN201210202416A CN102722122A CN 102722122 A CN102722122 A CN 102722122A CN 2012102024162 A CN2012102024162 A CN 2012102024162A CN 201210202416 A CN201210202416 A CN 201210202416A CN 102722122 A CN102722122 A CN 102722122A
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Abstract
The invention discloses a system and a method for displaying or controlling automobiles by a CAN (controller area network) bus. The system comprises an automobile control system, a bus decoding module, a single chip microcomputer module, a system module and a bus application module which are sequentially connected through serial ports. The bus decoding module is used for receiving information sent by an automobile control system and then decoding and converting the information to a data package understandable by the bus application module to be forwarded to the bus application module for execution by the aid of the single chip microcomputer module and the system module; or the bus decoding module is used for receiving a data package sent by the bus application module by the aid of the system module and the single chip microcomputer module, then analyzing the received data package and forwarding the automobile control system for execution; and the single chip microcomputer module and the system module are only used for forwarding the received data package without any processing. Data analysis and processing of the automobile control system are changed to be performed by upper applications from a MUC (microprogrammed control unit), so that the problem of extremely large workload of the MUC can be well solved.
Description
Technical field
The present invention relates to the automobile control technology, relate in particular to and a kind ofly show or Control of Automobile through the CAN bus
System and method.
Background technology
Data interaction between existing automotive interior control system and each detection and topworks all is to send through the CAN bus to converge data to CAN BOX; CAN BOX sends to MCU through certain dissection process through serial ports with data again; MCU again with the data of receiving analyze, verification, processing, to produce some visual effects or to send number order and give the automotive interior control system.So after data transmission frequency and data volume acquire a certain degree,, in a large number, fast, in time handle the data that CAN sends again, cause the MCU workload to expand unusually because MCU also has other work to do.Therefore, how to alleviate the MCU work load
Just become a technical matters that needs to be resolved hurrily in the industry.
Summary of the invention
Order of the present invention ground is to solve the problem that exists in the above-mentioned prior art, proposes a kind of through the CAN bus
The system and method for demonstration or Control of Automobile.The present invention with the data analysis of automotive interior control system, handle and be transformed into upper layer application by MCU and handle, solved the problem that the MCU workload is expanded unusually well.
The technical scheme that the present invention adopts is; Design a kind of system through demonstration of CAN bus or Control of Automobile; Comprise: the automotive control system, bus encoding/decoding module, one-chip computer module, system module and the bus application module that connect through serial ports successively, described bus encoding/decoding module are used to receive the information that automotive control system sends, and decode then; Convert the packet that the bus application module can be understood to, be transmitted to the bus application module through one-chip computer module and system module again and carry out; Or receive the packet that the bus application module is sent out through system module and one-chip computer module, and then the packet that receives is resolved, be transmitted to automotive control system again and carry out; Described one-chip computer module and system module are not done any processing to the packet that receives, and only do intactly to transmit and handle.
The present invention also proposes a kind of method through demonstration of CAN bus or Control of Automobile, comprises the following steps:
Receive the information data of automotive control system transmission when the bus encoding/decoding module after, these data are decoded, convert the packet that the bus application module can be understood to, be transmitted to the bus application module through one-chip computer module and system module then and carry out;
When the bus encoding/decoding module receives the packet that the bus application module sends out through system module and one-chip computer module, the packet that receives is resolved, be transmitted to automotive control system then and carry out; Described one-chip computer module and system module are not done any processing to the packet that receives, and only do intactly to transmit and handle.
In one embodiment, described system module adopts the Android system framework.Described automotive control system comprises reversing detection module, brake detection module, radar module, audio-frequency module, Climate Control Module and/or driver module.Described bus application module comprises radio receiver module, video disc module, bluetooth module, ipad module, SD/USB module and/or reversing application module.
Compared with prior art, the present invention has following beneficial effect:
1, use the present invention handles the data of automotive interior control system, can alleviate the workload of MCU greatly, lets MCU can more efficiently more in time go to handle other data.
2, use the present invention to handle the data of automotive interior control system,, do not relate to system level because deal with data has been placed on application layer, can better maintaining and transplanting.
3, use the present invention to handle the data of automotive interior control system, the data on the flexible processing car are equivalent to the rich client technology more, can obtain better interactive experience.
Description of drawings
Below in conjunction with accompanying drawing the present invention is carried out detailed explanation, wherein:
Fig. 1 is the theory diagram of system of the present invention;
Fig. 2 is the process flow diagram that the present invention receives the data of automotive control system transmission;
Fig. 3 is the process flow diagram that the present invention receives the data of bus application module transmission.
Embodiment
The present invention relates to the data transmission and processing technology, the data interactive method between particularly a kind of automotive interior control system and each detection and topworks.
As shown in Figure 1; The system that passes through demonstration of CAN bus or Control of Automobile that the present invention proposes comprises: the automotive control system, bus encoding/decoding module, one-chip computer module, system module and the bus application module that connect through serial ports successively; Described bus encoding/decoding module is used to receive the information that automotive control system sends; Decode then, convert the packet that the bus application module can be understood to, be transmitted to the bus application module through one-chip computer module and system module again and carry out; Or receive the packet that the bus application module is sent out through system module and one-chip computer module, and then the packet that receives is resolved, be transmitted to automotive control system again and carry out; Described one-chip computer module and system module are not done any processing to the packet that receives, and only do intactly to transmit and handle.
The method of passing through demonstration of CAN bus or Control of Automobile that the present invention proposes comprises the following steps:
Receive the information data of automotive control system transmission when the bus encoding/decoding module after, these data are decoded, convert the packet that the bus application module can be understood to, be transmitted to the bus application module through one-chip computer module and system module then and carry out;
When the bus encoding/decoding module receives the packet that the bus application module sends out through system module and one-chip computer module, the packet that receives is resolved, be transmitted to automotive control system then and carry out; Described one-chip computer module and system module are not done any processing to the packet that receives, and only do intactly to transmit and handle.
Fig. 2 and Fig. 3 are the process flow diagrams of a specific embodiment.As shown in Figure 2, the data method that the present invention receives the automotive control system transmission comprises five parts, and flow process is following:
First part is an automotive control system.This part is the part of automobile self, and the automobile oneself state changes will send data, such as the speed of a motor vehicle, oil consumption, the various states of air-conditioning, door contact interrupter state etc.
Second part is bus encoding/decoding module (CAN BOX).The data that automotive control system sends can be received by this part, crack the information that automobile sends then, convert the packet that the part on this can be understood to, and send through serial ports.
Third part is one-chip computer module (MCU).MCU can not make any processing after receiving the data that CAN BOX sends over, and remains untouched and all is given to the 4th part.
The 4th part is a system module.This module adopts the Android system framework, and this module can not done any processing to data after receiving the data that MCU turns over yet, and just plays the effect of a forwarding, and the form through broadcasting sends to the 5th part.
The 5th part is the bus application module.This module receives after the broadcasting that system module sends, the data that the broadcasting the inside comprises are resolved, then according to agreement to the data that parse show, other handled such as response.
Such as when the car owner changes air conditioner wind speed, transmit through above-mentioned a series of conversion, finally arriving this part, applying portion just can be handled these data of wind speed so, lets show the picture of close friend's current wind speed as smart as a new pin on the interface.
As shown in Figure 3, the method that the bus application module sends data to automotive control system also can be divided into five parts, and flow process is following:
First is that the user directly can experience the part of controlling.When the user carried out some operation on the interface when, the bus application module will send the corresponding data bag in strict accordance with agreement and give system.When receiving, system can not do any processing after use passing the data of coming; Be given to MCU to data, this moment, MCU was a bridge also, was given to CAN BOX to data through serial ports from cover to cover; CAN BOX is as a demoder; Can resolve beginning most the data that application layer sends according to the agreement reserved, the data that parse can be discerned to automotive control system, and automotive control system will produce respective reaction then.
Among the present invention, MCU no longer as the level of deal with data, just plays the effect of a passage, and this will significantly reduce the fussy degree of MCU deal with data, optimize the function of MCU to a certain extent.And in the future maintenance with also convenient many easily above transplanting.The interface is handled than MCU in the application layer process interface also has very big advantage on user experience.
Claims (8)
1. one kind shows through the CAN bus or the system of Control of Automobile; It is characterized in that comprising: the automotive control system, bus encoding/decoding module, one-chip computer module, system module and the bus application module that connect through serial ports successively; Described bus encoding/decoding module is used to receive the information that automotive control system sends; Decode then, convert the packet that the bus application module can be understood to, be transmitted to the bus application module through one-chip computer module and system module again and carry out; Or receive the packet that the bus application module is sent out through system module and one-chip computer module, and then the packet that receives is resolved, be transmitted to automotive control system again and carry out; Described one-chip computer module and system module are not done any processing to the packet that receives, and only do intactly to transmit and handle.
2. system according to claim 1 is characterized in that: described system module adopts the Android system framework.
3. system according to claim 1 is characterized in that: described automotive control system comprises reversing detection module, brake detection module, radar module, audio-frequency module, Climate Control Module and/or driver module.
4. system according to claim 1 is characterized in that: described bus application module comprises radio receiver module, video disc module, bluetooth module, ipad module, SD/USB module and/or reversing application module.
5. the method through demonstration of CAN bus or Control of Automobile is characterized in that comprising the following steps:
Receive the information data of automotive control system transmission when the bus encoding/decoding module after, these data are decoded, convert the packet that the bus application module can be understood to, be transmitted to the bus application module through one-chip computer module and system module then and carry out; When the bus encoding/decoding module receives the packet that the bus application module sends out through system module and one-chip computer module, the packet that receives is resolved, be transmitted to automotive control system then and carry out; Described one-chip computer module and system module are not done any processing to the packet that receives, and only do intactly to transmit and handle.
6. method according to claim 5 is characterized in that: described system module adopts the Android system framework.
7. method according to claim 5 is characterized in that: described automotive control system comprises reversing detection module, brake detection module, radar module, audio-frequency module, Climate Control Module and/or driver module.
8. method according to claim 5 is characterized in that: described bus application module comprises radio receiver module, video disc module, bluetooth module, ipad module, SD/USB module and/or reversing application module.
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| CN2012102024162A CN102722122A (en) | 2012-06-19 | 2012-06-19 | System and method for displaying or controlling automobiles by CAN (controller area network) bus |
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| CN2012102024162A CN102722122A (en) | 2012-06-19 | 2012-06-19 | System and method for displaying or controlling automobiles by CAN (controller area network) bus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106200907A (en) * | 2016-06-29 | 2016-12-07 | 深圳市爱培科技术股份有限公司 | A kind of intelligent back vision mirror gestural control system and method |
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Application publication date: 20121010 |