CN107154948A - A kind of multi-protocol data exchange method applied to car launcher information control system - Google Patents
A kind of multi-protocol data exchange method applied to car launcher information control system Download PDFInfo
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- CN107154948A CN107154948A CN201710560333.3A CN201710560333A CN107154948A CN 107154948 A CN107154948 A CN 107154948A CN 201710560333 A CN201710560333 A CN 201710560333A CN 107154948 A CN107154948 A CN 107154948A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses a kind of multi-protocol data exchange method applied to car launcher information control system, this method comprises the following steps, step 1, the connection of each network segment and gateway unit is set up respectively；Step 2, monitor whether there are the data that each network segment is sended over by the gateway unit；If it is, performing step 3；If it is not, then re-executing step 2；Step 3, the data that each network segment is sended over are preserved；Step 4, identification data ID and data flow information, adjust the form of the data；Step 5, according to the ID of the data and data flow information, the data forwarding after Format adjusting is gone out；It is then back to step 2.Present invention, avoiding the confusion phenomena generation that multisegment data can only be placed on the same network segment, make that system architecture is clear, data are more preferable without cross jamming, real-time Transmission effect, distrbuted control and remote control multiple choices have been provided the user, the modernization level of car launcher information system is improved.
Description
Technical field
The present invention relates to car launcher information control technical field, more specifically, the present invention is applied to transmitting to be a kind of
The multi-protocol data exchange method of car information control system.
Background technology
At present, CAN is a kind of serial communication network for supporting distributed control mode, because its have high reliability,
Low transmission error rate, using many advantages, such as convenience and as one of current most widely used several fieldbus, in control
Field extensive application.
The main implementation of conventional car launcher information control system is often single CAN network pattern, but single
The one CAN only one of which network segment, only supports a kind of CAN agreement, so that it is same to cause multisegment data to be put in
The network segment and the data corruption problem produced, and then result in the poor real, very flexible, reliability of car launcher information control
Poor the problems such as, thus this pattern limits the development of the car launcher information control system of modernization.
Therefore, multisegment data are placed in the same network segment and produced in conventional scheme confusion phenomena and such as how is avoided
What improves real-time, flexibility and the reliability of car launcher information control, becomes those skilled in the art urgently to be resolved hurrily
Technical problem and the emphasis studied all the time.
The content of the invention
For solve multisegment data corruption, poor real, very flexible that existing car launcher information control method is present,
The problems such as poor reliability, the present invention innovatively proposes a kind of multi-protocol data applied to car launcher information control system and handed over
Mutual method, its gateway unit unified by setting carries out the reception and forwarding of data, so as to effectively solve according to different agreement
The interaction problems of the data of transmission, drastically increase real-time, flexibility and the reliability of car launcher information control.
To realize above-mentioned technical purpose, the invention discloses a kind of many associations applied to car launcher information control system
Data interactive method is discussed, the exchange method comprises the following steps,
Step 1, the connection of each network segment and gateway unit is set up respectively；Each network segment includes car launcher information control system
The control network segment, the car control network segment, distribution network section and the chassis network segment are sent out in survey in system, and the communications protocol and its for controlling the network segment are sent out in the survey
The communications protocol of his network segment is different；
Step 2, monitor whether there are the data that each network segment is sended over by the gateway unit；If it is, performing step
Rapid 3；If it is not, then re-executing step 2；
Step 3, the data that each network segment is sended over are preserved；
Step 4, identification data ID and data flow information, adjust the form of the data；
Step 5, according to the ID of the data and data flow information, the data forwarding after Format adjusting is gone out, so that
Interconnecting between four network segments of completion；It is then back to step 2.
The present invention innovatively realizes interconnecting between four network segments by gateway unit, so as to complete to survey hair control ether
Network data is respectively with car control CAN data, for distribution CAN data, the transmitted in both directions function of chassis CAN data, while realizing car
Control the alternating transmission function of CAN data between the network segment, distribution network section, the chassis network segment.
Further, in step 3, preserve step before, in addition to data carry out Effective judgement the step of；If number
According to effective, then data are preserved；If data invalid, give up the invalid data, return to step 2.
The present invention efficiently avoid invalid data to control system based on above-mentioned additional Effective judgement technical characteristic
The occupancy of resource and the execution of false command, improve the reliability that the present invention works.
Further, the hair control network segment of surveying uses Ethernet udp protocol, and the car control network segment uses CAN network
CANOpen agreements, the distribution network section also uses CAN network CANOpen agreements, and the chassis network segment uses CAN network SAE
J1939 agreements.
In the present invention, communication network of the hair control network segment structure using Internet as core is surveyed, realizes and is based on networking and letter
Integrative operation commander, intelligence test and the rapid fire control of breathization；The car control network segment uses Field Bus CAN control technology,
And the binary channels based on CANOpen agreements realizes the reliable communication of data with receipts with originating party formula, to complete transmitting car exhibition car, rise
It is perpendicular, return and the automatic flow such as embrace, return the vehicle to the garage and knock off and control；Distribution network section also uses Field Bus CAN control technology, and based on CANOpen
The binary channels of agreement supplies upper electricity, pressure regulation instruction and time order and the voltage x current of distribution management unit with receiving with originating party formula realization intelligence
The reliable communication of data；The chassis network segment uses Field Bus CAN control technology, the single channel extension based on SAE J1939 agreements
Frame, realizes detection, suspension automatic adjustment height, the auxiliary driving of the equipment states such as chassis electric system chassis engine and gearbox
Etc. function.
Further, it is described survey hair control the network segment, the car control network segment, distribution network section and the chassis network segment between carry out physics every
From.
In the large-scale information system that remote control and the control of multinode distrbuted are combined, the present invention is solved
The Ethernet of udp protocol is supported respectively with supporting CANOpen agreements, the CAN network data of J1939 agreements to communicate, while real
Show data communication between CANOpen agreements and J1939 agreement CAN networks, substantially increase car launcher information control system
Real-time, flexibility and reliability.
Further, in step 2, data are received by polling mode；In step 5, the mode of data forwarding is included immediately
Forwarding and timing are forwarded, and timing forwarding is by interrupt mode realization, according to the fixed cycle by data forwarding.
Further, in step 5, interruption is realized by way of timer is set.
Further, the gateway unit uses the framework that dsp controller is combined with FPGA controller, the DSP controls
Data are exchanged by dual port RAM between device and FPGA controller, the FPGA controller is used to receive, send CAN data
And Ethernet data, the dsp controller is for receiving, filtering and forwarding CAN data and Ethernet data.
Further, in step 2, by the FPGA controller of gateway unit monitor successively the car control network segment, distribution network section,
Whether the chassis network segment and the survey hair control network segment have data incoming.
Beneficial effects of the present invention are：Present invention, avoiding the confusion phenomena that multisegment data can only be placed on the same network segment
Occur, make that system architecture is clear, data without cross jamming, so as to improve real-time Transmission effect, provided the user live distribution
Formula is controlled and remote control multiple choices, improves the modernization level of car launcher information system.Therefore, the present invention greatly
Improve real-time, flexibility and the reliability of car launcher information control system.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of multi-protocol data exchange method applied to car launcher information control system.
Fig. 2 is the schematic diagram for implementing the control system of the present invention.
Fig. 3 is the schematic diagram of gateway unit hardware configuration.
Fig. 4 is the schematic diagram of the data interaction major cycle flow of each network segment.
Fig. 5 is the schematic diagram of car control network segment data receiver handling process.
Fig. 6 is the schematic diagram of timing forward process flow.
Embodiment
With reference to Figure of description to a kind of multi-protocol data applied to car launcher information control system of the invention
Exchange method carries out detailed explanation and illustration.
As shown in figures 1 to 6, in order to give full play to the networking control function of CAN, remote control is realized, the present invention is specific
A kind of multi-protocol data exchange method applied to car launcher information control system is disclosed, ethernet technology is total with CAN
Line technology is combined, for CAN, and Ethernet has higher traffic rate and farther transmission range, based on UDP
The ethernet technology of agreement uses international mainstream standard, and remote access can be achieved, thus the present invention is innovatively by Ethernet and CAN
Bus is conjointly employed in the data interaction of field control level, so as to extend control system.The exchange method is flat based on DSP
The CAN network of platform and the data interactive method of Ethernet multi-protocols, specifically include following steps.
Step 1, the connection of each network segment and gateway unit is set up respectively；In the present embodiment, according to the function of control system point
Analysis and independence demand, as shown in figure 1, the survey hair that each network segment is included in car launcher information control system controls the network segment, car control
The network segment, distribution network section and the chassis network segment, in order to improve the reliability and validity of data transfer, survey the hair control network segment, car control net
It is physically separated between section, distribution network section and the chassis network segment, it is necessary to could be realized between each network segment by gateway unit
Data filtering and forwarding, and survey hair control the network segment communications protocol it is different from the communications protocol of other network segments.In the present embodiment, survey
The hair control network segment uses Ethernet udp protocol, and the car control network segment uses CAN network CANOpen agreements, and distribution network section is also used
CAN network CANOpen agreements, the chassis network segment uses CAN network SAE J1939 agreements, and the present invention is corresponding according to above-mentioned agreement
The definition of norm-setting Ethernet data interface and the definition of CAN data-interface, specify that the ID of each frame data, length,
The contents such as data flow, transmission means, data implication, it is ensured that each network segment data can effectively be handed over according to system requirements
Mutually.
More specifically, gateway unit uses the framework that is combined with FPGA controller of dsp controller, dsp controller and
Data are exchanged by dual port RAM between FPGA controller, FPGA controller is used to receive, send CAN data and Ethernet
Data, and dsp controller is used to receiving, filter and forwarding CAN data and Ethernet data.In the present embodiment, such as Fig. 2 institutes
Show, the model TMS320F28335 of dsp controller, the signal of FPGA controller is LX60 series, wherein, FPGA controller point
Physical layer not with CAN and ethernet controller is connected, and it is responsible for the reception and transmission of data, UDP-CAN data
Interaction, CAN-CAN data interactions are carried out in dsp controller.
Step 2, as shown in figure 4, the present invention receives data by polling mode, specifically, being monitored by gateway unit is
The no data for thering is each network segment to send over；If it is, performing step 3；If it is not, then re-executing step 2；The present embodiment
In, the car control network segment, distribution network section, the chassis network segment are monitored by the FPGA controller in gateway unit successively and the hair control network segment is surveyed
Whether there are data incoming, if having inquired data receiver, perform step 3.
Step 3, the data that each network segment is sended over are preserved；In the present embodiment, before step is preserved, in addition to data are entered
The step of row Effective judgement；When having inquired data receiver, if data effectively, preserve data；If data invalid,
Then give up the invalid data, return to step 2.
Step 4, for effective data, the present invention adjusts the lattice of data by identification data ID and data flow information
Formula.
Step 5, according to the ID of data and data flow information, the data forwarding after Format adjusting is gone out, so as to complete
Interconnecting between four network segments；It is then back to step 2.More specifically, the mode of data forwarding include immediately forwarding and
Timing is forwarded, and timing is forwarded data forwarding by interrupt mode realization, according to the fixed cycle, specifically, by setting timing
The mode of device realizes interrupt function.
In the specific implementation process of the present invention, as shown in Fig. 3,4,5,6, the present invention inquires about whether each network segment receives successively
Data, if it find that there is new data, then judge the validity of data, for valid data according to the ID and content of data
Preserved, the respective handling such as data format adjustment and forwarding, data in CAN by CAN transceiver and CAN every
Entered from device inside FPGA controller, parallel data is converted serial data into by CAN IP, deposited after verification, filtering
Enter IP kernel and receive FIFO, and produce reception to interrupt, the internal data processing logic in FPGA controller checks whether CAN IP produce
Raw receive is interrupted, if then by CAN data from IP kernel receive FIFO in read deposit and receive FIFO, while to dsp controller
Send interrupt signal.Data to be sent are write transmitter register, the internal data processing logic of FPGA controller by dsp controller
Data to be sent are write to CAN IP transmitter register according to the desired forms of CAN IP, CAN IP verify data increase simultaneously
It is sent to after serialization by CAN isolators and CAN transceiver in CAN.In the present embodiment, data sending processing is divided into
Immediately forwarding and timing are forwarded：Immediately forwarding refers to define to receive according to each network segment interface that other network segments must be immediately transmitted to
Data, mainly including control instruction, instruct back make, warning message etc., and the corresponding module of the processing mode is at data receiver
It is called in reason, adjusts data format according to agreement and be sent to respective wire section；It is fixed according to each network segment interface that timing forwarding refers to
Justice at certain intervals the time by the data forwarding of a network segment to another network segment, the main sensing data including each network segment
And heartbeat data.Regularly forwarding requires that the transmission cycle per frame data is 1s, but all timings transmission data can not be with for the moment
Quarter is forwarded, it is to avoid bus load is instantaneously excessive to cause data frame losing, so the present invention has used one in dsp controller
40ms timers, as shown in fig. 6, timing one is arrived every time, only send the corresponding frame data of current offset, then will skew
Next frame data are pointed to, are sent when waiting Interruption next time, this processing mode causes all the 25 of needs timing forwarding
Frame data have reached the effect of cycle 1s and dispersed forwarding.Based on the reception and transmission of above-mentioned CAN data, Ethernet
It is similar that the reception and transmission of data receive sending function with CAN.
Based on such scheme, the present invention realizes udp protocol Ethernet and CANOpen agreement CAN network datas
Communication, realizes udp protocol Ethernet and J1939 agreement CAN network data communications, realizes CANOpen agreements CAN
Bus network and J1939 agreement CAN network data communications.
In addition, in the description of the invention, " multiple " are meant that at least two, such as two, three, unless otherwise
It is clearly specific to limit.In the description of this specification, reference term " the present embodiment ", " one embodiment ", " some implementations
The description of example ", " example ", " specific example " or " some examples " etc. means the specific spy for combining the embodiment or example description
Levy, structure, material or feature are contained at least one embodiment of the present invention or example.In this manual, to above-mentioned
The schematic representation of term is necessarily directed to identical embodiment or example.Moreover, the specific features of description, structure, material
Material or feature can in an appropriate manner be combined in any one or more embodiments or example.In addition, not conflicting
In the case of, those skilled in the art can be by the not be the same as Example or example and non-be the same as Example described in this specification
Or the feature of example is combined and combined.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Any modification, equivalent substitution and simple modifications for being made in content etc., should be included in the scope of the protection.
Claims (8)
1. a kind of multi-protocol data exchange method applied to car launcher information control system, it is characterised in that：The interaction side
Method comprises the following steps,
Step 1, the connection of each network segment and gateway unit is set up respectively；Each network segment is included in car launcher information control system
The survey hair control network segment, the car control network segment, distribution network section and the chassis network segment, and described communications protocol and other nets for surveying the hair control network segment
The communications protocol of section is different；
Step 2, monitor whether there are the data that each network segment is sended over by the gateway unit；If it is, performing step 3；
If it is not, then re-executing step 2；
Step 3, the data that each network segment is sended over are preserved；
Step 4, identification data ID and data flow information, adjust the form of the data；
Step 5, according to the ID of the data and data flow information, the data forwarding after Format adjusting is gone out, so as to complete
Interconnecting between four network segments；It is then back to step 2.
2. the multi-protocol data exchange method according to claim 1 applied to car launcher information control system, it is special
Levy and be：In step 3, preserve step before, in addition to data carry out Effective judgement the step of；If data are effectively,
Preserve data；If data invalid, give up the invalid data, return to step 2.
3. the multi-protocol data exchange method according to claim 1 or 2 applied to car launcher information control system, its
It is characterised by：The hair control network segment of surveying uses Ethernet udp protocol, and the car control network segment is assisted using CAN network CANOpen
View, the distribution network section also uses CAN network CANOpen agreements, and the chassis network segment is assisted using CAN network SAE J1939
View.
4. the multi-protocol data exchange method according to claim 3 applied to car launcher information control system, it is special
Levy and be：Described survey is physically separated between the hair control network segment, the car control network segment, distribution network section and the chassis network segment.
5. the multi-protocol data exchange method according to claim 4 applied to car launcher information control system, it is special
Levy and be：
In step 2, data are received by polling mode；
In step 5, the mode of data forwarding includes forwarding immediately and timing is forwarded, and the timing forwarding is real by interrupt mode
It is existing, according to the fixed cycle by data forwarding.
6. the multi-protocol data exchange method according to claim 5 applied to car launcher information control system, it is special
Levy and be：In step 5, interruption is realized by way of timer is set.
7. the multi-protocol data exchange method applied to car launcher information control system according to claim 4 or 6, its
It is characterised by：The gateway unit uses the framework that dsp controller is combined with FPGA controller, the dsp controller and FPGA
Data are exchanged by dual port RAM between controller, the FPGA controller is used to receive, send CAN data and Ethernet
Data, the dsp controller is used to receiving, filter and forwarding CAN data and Ethernet data.
8. the multi-protocol data exchange method according to claim 7 applied to car launcher information control system, it is special
Levy and be：In step 2, by the FPGA controller of gateway unit monitor successively the car control network segment, distribution network section, the chassis network segment and
Survey whether the hair control network segment there are data incoming.
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| CN108891227A (en) * | 2018-06-29 | 2018-11-27 | 深圳市汇川技术股份有限公司 | A kind of method, system and control panel that vehicle is communicated with air-conditioning |
| CN109117313A (en) * | 2018-08-28 | 2019-01-01 | 成都信息工程大学 | A kind of band isolation calamity for mechanism of control vehicle wisdom security gateway and management-control method |
| CN113325831A (en) * | 2021-06-24 | 2021-08-31 | 江铃汽车股份有限公司 | Gateway routing method for platform-based automobile flash diagnosis |
| CN114237195A (en) * | 2021-11-09 | 2022-03-25 | 岚图汽车科技有限公司 | OBD emission diagnosis method and related equipment |
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