CN102014139B - Protocol conversion device for vehicle FlexRay bus and Ethernet - Google Patents
Protocol conversion device for vehicle FlexRay bus and Ethernet Download PDFInfo
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- CN102014139B CN102014139B CN 201010593801 CN201010593801A CN102014139B CN 102014139 B CN102014139 B CN 102014139B CN 201010593801 CN201010593801 CN 201010593801 CN 201010593801 A CN201010593801 A CN 201010593801A CN 102014139 B CN102014139 B CN 102014139B
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Abstract
The invention relates to a protocol conversion device for a vehicle FlexRay bus and an Ethernet, belonging to the technical field of network communication. The device comprises a processor, a peripheral circuit of the processor, a data storage circuit, a FlexRay bus interface circuit with isolation, an Ethernet interface circuit with isolation, a serial interface circuit and a power supply circuit. The device provided by the invention is simple in structure and low in cost, is convenient to use, and can conveniently monitor the FelxRay bus in real time by adopting a portable computer in the vehicle; and complete air electrical isolation measures are adopted, and a bus protection circuit is additionally arranged at the external interface end of the FlexRay bus, thus the device can better play the role in resisting interference and protecting an inner circuit and an upper computer.
Description
Technical field
The present invention relates to the protocol conversion apparatus of a kind of automobile-used FlexRay bus and Ethernet, belong to network communications technology field.
Background technology
The FlexRay bus is by the common a kind of Novel Communication standard formulated of the companies such as BMW, DaimlerChrysler, Philips, Freescale, Bosch, mainly use (X-by-wire) towards vehicle-mounted line traffic control, adopt the time-based driving mechanism, have the characteristics such as high bandwidth, fault freedom be good, compare with automobile-used traditional C AN bus, have certain advantage aspect real-time, reliability and the flexibility.
The FlexRay bus has been made a large amount of research-and-development activitys abroad, and the application of succeeding in some high-end vehicles.For example, Germany's BMW (BMW) has adopted the FlexRay agreement in the Electronic Control shock absorber system of SUV X5 series vehicle, fail safe and agility when having realized better riding comfort and driving will impose in addition the load change of tire and the vibration on chassis and all reduce to minimum; The BMW X6 vehicle of being connected with X7 all continues to use FlexRay to connect the vibration absorber electronic control unit of standby wheel suspension on the basis of this system, controls the vibration absorber damping force according to transport condition, keeps better vehicle stabilization; Germany Audi also imports FlexRay in the drive assist system of trendy Audi A8 of 09 year beginning volume production, adopt the FlexRay transceiver at grace intelligence Pu.Along with the promotion of foreign study and application, domestic research to the FlexRay bus has also entered the period of a develop rapidly.
There are at present some protocol conversion apparatus for the FlexRay bus to be developed gradually, such as the communication gate of FlexRay-CAN, the communication gate of FlexRay-RS485, these mainly have two buses simultaneously towards the scene, need to carry out data communication between the two, such as having simultaneously FlexRay bus and CAN bus in the vehicle, the FlexRay-CAN gateway is as the part of vehicle-mounted actual motion parts at this moment.But for the operating FlexRay bus of real vehicle, in research process, often need by the data on computer (especially on-the-spot through the notebook computer commonly used) real time monitoring network, adopt Ethernet this moment is exactly a good scheme, because existing computer substantially all has been equipped with Ethernet interface.Therefore, existing protocol conversion apparatus for the FlexRay bus has following deficiency:
1. can not satisfy the FlexRay bus to the protocol conversion requirement of Ethernet;
2. directly monitor the FlexRay bus data for the field by using computer convenient not, although the part gateway with the RS232 interface, on present most of notebook computer at assembling RS232 interface;
3. and do not have effective electrical isolation measure between the FlexRay bus.
Summary of the invention
The objective of the invention is in order easily to the operating FlexRay bus of real vehicle implementing monitoring, to propose the protocol conversion apparatus of a kind of automobile-used FlexRay bus and Ethernet.
The objective of the invention is to be achieved through the following technical solutions.
The protocol conversion apparatus of a kind of FlexRay bus of the present invention and Ethernet, comprise the FlexRay bus interface circuit of processor and processor peripheral circuit, data storage circuit, band isolation, ethernet interface circuit, serial interface circuit and the power circuit of band isolation, its peripheral circuit is extraneous FlexRay network and host computer, and its annexation and signal flow to and be:
The FlexRay bus interface circuit of band isolation is by communication controler, buffer circuit, bus driver and bus protection circuit consist of, wherein communication controler passes through data/address bus, address bus links to each other with processor with control bus, buffer circuit is by the first optocoupler, the second optocoupler, the 3rd optocoupler and peripheral circuit thereof form, three road optocouplers connect respectively the transmitted signal of communication controler, receive the transmitted signal of signal and transmission enable signal and bus driver, receive signal and send enable signal, wherein the signal flow direction is from communication controler to bus driver for the direction of transmitted signal and transmission enable signal, the direction that receives signal is from bus driver to communication controler, and the network interface end of bus driver is through the extraneous FlexRay network of bus protection circuit access;
The ethernet interface circuit of band isolation is by ethernet controller, isolating transformer and Ethernet interface form, wherein ethernet controller passes through data/address bus, address bus links to each other with processor with control bus, ethernet controller and isolating transformer are by the data input just, the data input is negative, data output just links to each other with negative four holding wires of data input, wherein data inputs just and the data input connect the first resistance of 200 ohm between negative, data output just and data output connect the second resistance of 200 ohm between negative, isolating transformer by data receiver just, data receiver is negative, data just send and to send negative four holding wires with data and linking to each other and link to each other with Ethernet interface, Ethernet interface with by ethernet line with monitor host computer and link to each other;
Serial interface circuit links to each other with the serial ports of processor by two serial signal line, and the serial interface circuit external interface links to each other with host computer, in order to realize that host computer is to the parameter configuration of this protocol conversion apparatus;
The data storage circuit links to each other with processor with address bus by data/address bus;
The input of power circuit connects the externally fed power supply, output is divided into the two-way of mutual isolation: the one tunnel for the circuit between isolation optocoupler and the extraneous FlexRay bus in the FlexRay bus interface circuit of isolation provides power supply, and another road provides power supply for other partial circuits;
Above-mentioned host computer is with the desktop computer of Ethernet interface or notebook computer;
Memory in the above-mentioned data storage circuit is volatile memory.
The protocol conversion apparatus of a kind of FlexRay bus of the present invention and Ethernet, its course of work comprises:
1) processor receives the data of extraneous FlexRay bus by the FlexRay bus interface circuit of being with isolation and according to the FlexRay agreement data is resolved, data after resolving are packed according to the communication protocol of host computer Ethernet, and the ethernet interface circuit of the data communication device after the packing being crossed the band isolation sends to host computer; By being with the ethernet interface circuit of isolating to receive the data of host computer and according to the communication protocol of host computer Ethernet data being resolved, data after resolving are packed according to the FlexRay agreement, with after the packing this data communication device that receives of data FlexRay bus interface circuit of crossing band isolation send to extraneous FlexRay bus, thereby realize the protocol conversion of FlexRay bus and Ethernet;
2) processor is divided into two parts with the memory space of the memory in the data storage circuit, the data of the host computer that a part arrives in order to storing received, a part is in order to store the data of extraneous FlexRay bus, all adopt the mode of first-in first-out during data in the every part memory space of processor read memory, the effect that the data storage circuit is higher at network transmission speed, transmitted data amount can play buffer memory in larger;
3) processor can receive by serial interface circuit or Ethernet the parameter configuration of host computer, and configures the FlexRay bus interface circuit of band isolation according to parameter configuration, can satisfy the needs from extraneous different FlexRay net mates.
Beneficial effect
The present invention is simple in structure, cost is low, application is convenient; Can adopt easily portable computer to get on the bus the FlexRay bus is carried out Real Time Monitoring; Adopt completely electrical isolation measure, and added the bus protection circuit at FlexRay bus external interface end, can play better effect anti-interference and protective circuit and host computer.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Embodiment
The protocol conversion apparatus of a kind of FlexRay bus and Ethernet, comprise the FlexRay bus interface circuit of processor and processor peripheral circuit, data storage circuit, band isolation, ethernet interface circuit, serial interface circuit and the power circuit of band isolation, its peripheral circuit is extraneous FlexRay network and host computer, as shown in Figure 1, its annexation and signal flow to and are:
The FlexRay bus interface circuit of band isolation is by communication controler, buffer circuit, bus driver and bus protection circuit consist of, wherein communication controler passes through data/address bus, address bus links to each other with processor with control bus, buffer circuit is comprised of three road optocouplers and peripheral circuit thereof, three road optocouplers connect respectively the transmitted signal of communication controler, receive the transmitted signal of signal and transmission enable signal and bus driver, receive signal and send enable signal, wherein the signal flow direction is from communication controler to bus driver for the direction of transmitted signal and transmission enable signal, the direction that receives signal is from bus driver to communication controler, and the network interface end of bus driver is through the extraneous FlexRay network of bus protection circuit access;
The ethernet interface circuit of band isolation is by ethernet controller, isolating transformer and Ethernet interface form, wherein ethernet controller passes through data/address bus, address bus links to each other with processor with control bus, ethernet controller and isolating transformer are by the data input just, the data input is negative, data output just links to each other with negative four holding wires of data input, wherein data inputs just and the data input connect the first resistance of 200 ohm between negative, data output just and the data input connect the second resistance of 200 ohm between negative, isolating transformer by data receiver just, data receiver is negative, data just send and to send negative four holding wires with data and linking to each other and link to each other with Ethernet interface, Ethernet interface with by ethernet line with monitor host computer and link to each other;
Serial interface circuit links to each other with the serial ports of processor by two serial signal line, and the serial interface circuit external interface links to each other with host computer, in order to realize that host computer is to the parameter configuration of this protocol conversion apparatus;
The data storage circuit links to each other with processor with address bus by data/address bus;
The input of power circuit connects the externally fed power supply, output is divided into the two-way of mutual isolation: the one tunnel for the circuit between isolation optocoupler and the extraneous FlexRay bus in the FlexRay bus interface circuit of isolation provides power supply, and another road provides power supply for other partial circuits;
Above-mentioned host computer is with the desktop computer of Ethernet interface or notebook computer;
Above-mentioned processor is SST89E564RD, can realize by serial ports program burn writing and the debugging of processor, does not need other programming connecting circuit;
Communication controler in the FlexRay bus interface circuit of above-mentioned band isolation is MFR4200;
Bus driver in the FlexRay bus interface circuit of above-mentioned band isolation is TJA1080;
Three road optocouplers in the FlexRay bus interface circuit of above-mentioned band isolation are 6N137;
Memory in the above-mentioned data storage circuit is volatile memory;
The protocol conversion apparatus of a kind of FlexRay bus of the present invention and Ethernet, its course of work comprises:
1) processor receives the data of extraneous FlexRay bus by the FlexRay bus interface circuit of being with isolation and according to the FlexRay agreement data is resolved, data after resolving are packed according to the communication protocol of host computer Ethernet, and the ethernet interface circuit of the data communication device after the packing being crossed the band isolation sends to host computer; By being with the ethernet interface circuit of isolating to receive the data of host computer and according to the communication protocol of host computer Ethernet data being resolved, data after resolving are packed according to the FlexRay agreement, with after the packing this data communication device that receives of data FlexRay bus interface circuit of crossing band isolation send to extraneous FlexRay bus, thereby realize the protocol conversion of FlexRay bus and Ethernet;
2) processor is divided into two parts with the memory space of the memory in the data storage circuit, the data of the host computer that a part arrives in order to storing received, a part is in order to store the data of extraneous FlexRay bus, all adopt the mode of first-in first-out during data in the every part memory space of processor read memory, the effect that the data storage circuit is higher at network transmission speed, transmitted data amount can play buffer memory in larger;
3) processor can receive by serial interface circuit or Ethernet the parameter configuration of host computer, and configures the FlexRay bus interface circuit of band isolation according to parameter configuration, can satisfy the needs from extraneous different FlexRay net mates.
Claims (10)
1. the protocol conversion apparatus of a FlexRay bus and Ethernet, it is characterized in that: comprise the FlexRay bus interface circuit of processor and peripheral circuit thereof, data storage circuit, band isolation, ethernet interface circuit, serial interface circuit and the power circuit of band isolation, its peripheral circuit is extraneous FlexRay network and host computer, and its annexation and signal flow to and be:
The FlexRay bus interface circuit of band isolation is by communication controler, buffer circuit, bus driver and bus protection circuit consist of, wherein communication controler passes through data/address bus, address bus links to each other with processor with control bus, buffer circuit is by the first optocoupler, the second optocoupler, the 3rd optocoupler and peripheral circuit thereof form, three road optocouplers connect respectively the transmitted signal of communication controler, receive the transmitted signal of signal and transmission enable signal and bus driver, receive signal and send enable signal, wherein the signal flow direction is from communication controler to bus driver for the direction of transmitted signal and transmission enable signal, the direction that receives signal is from bus driver to communication controler, and the network interface end of bus driver is through the extraneous FlexRay network of bus protection circuit access;
The ethernet interface circuit of band isolation is by ethernet controller, isolating transformer and Ethernet interface form, wherein ethernet controller passes through data/address bus, address bus links to each other with processor with control bus, ethernet controller and isolating transformer are by the data input just, the data input is negative, data output just links to each other with negative four holding wires of data output, wherein data inputs just and the data input connect the first resistance of 200 ohm between negative, data output just and data output connect the second resistance of 200 ohm between negative, isolating transformer by data receiver just, data receiver is negative, data just send and to send negative four holding wires with data and linking to each other and link to each other with Ethernet interface, Ethernet interface with by ethernet line with monitor host computer and link to each other;
Serial interface circuit links to each other with the serial ports of processor by two serial signal line, and the serial interface circuit external interface links to each other with host computer, in order to realize that host computer is to the parameter configuration of this protocol conversion apparatus;
The data storage circuit links to each other with processor with address bus by data/address bus;
The input of power circuit connects the externally fed power supply, output is divided into the two-way of mutual isolation: the one tunnel for the circuit between isolation optocoupler and the extraneous FlexRay bus in the FlexRay bus interface circuit of isolation provides power supply, and another road provides power supply for other partial circuits;
Above-mentioned host computer is with the desktop computer of Ethernet interface or notebook computer.
2. the protocol conversion apparatus of a kind of FlexRay bus according to claim 1 and Ethernet, it is characterized in that: the memory in the described data storage circuit is volatile memory.
3. the protocol conversion apparatus of a kind of FlexRay bus according to claim 1 and Ethernet, it is characterized in that: described processor is SST89E564RD.
4. the protocol conversion apparatus of a kind of FlexRay bus according to claim 1 and Ethernet is characterized in that: the communication controler in the FlexRay bus interface circuit of described band isolation is MFR4200.
5. the protocol conversion apparatus of a kind of FlexRay bus according to claim 1 and Ethernet is characterized in that: the bus driver in the FlexRay bus interface circuit of described band isolation is TJA108.
6. the protocol conversion apparatus of a kind of FlexRay bus according to claim 1 and Ethernet is characterized in that: three road optocouplers in the FlexRay bus interface circuit of described band isolation are 6N137.
7. the protocol conversion apparatus of a kind of FlexRay bus according to claim 1 and Ethernet, it is characterized in that: its course of work comprises:
1) processor receives the data of extraneous FlexRay bus by the FlexRay bus interface circuit of being with isolation and according to the FlexRay agreement data is resolved, data after resolving are packed according to the communication protocol of host computer Ethernet, and the ethernet interface circuit of the data communication device after the packing being crossed the band isolation sends to host computer; By being with the ethernet interface circuit of isolating to receive the data of host computer and according to the communication protocol of host computer Ethernet data being resolved, data after resolving are packed according to the FlexRay agreement, the FlexRay bus interface circuit of data communication device after the packing being crossed the band isolation sends to extraneous FlexRay bus, thereby realizes the protocol conversion of FlexRay bus and Ethernet;
2) processor is divided into two parts with the memory space of the memory in the data storage circuit, the data of the host computer that a part arrives in order to storing received, and a part is in order to store the data of extraneous FlexRay bus.
8. the protocol conversion apparatus of a kind of FlexRay bus according to claim 7 and Ethernet is characterized in that: the mode that all adopts first-in first-out during data in the every part memory space of processor read memory.
9. the protocol conversion apparatus of a kind of FlexRay bus according to claim 7 and Ethernet, it is characterized in that: processor receives the parameter configuration of host computer by ethernet interface circuit, and configures the FlexRay bus interface circuit of band isolation according to parameter configuration.
10. the protocol conversion apparatus of a kind of FlexRay bus according to claim 7 and Ethernet, it is characterized in that: processor receives the parameter configuration of host computer by serial interface circuit, and configures the FlexRay bus interface circuit of band isolation according to parameter configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010593801 CN102014139B (en) | 2010-12-09 | 2010-12-09 | Protocol conversion device for vehicle FlexRay bus and Ethernet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010593801 CN102014139B (en) | 2010-12-09 | 2010-12-09 | Protocol conversion device for vehicle FlexRay bus and Ethernet |
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| CN102014139A CN102014139A (en) | 2011-04-13 |
| CN102014139B true CN102014139B (en) | 2013-02-27 |
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| CN 201010593801 Expired - Fee Related CN102014139B (en) | 2010-12-09 | 2010-12-09 | Protocol conversion device for vehicle FlexRay bus and Ethernet |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325128B (en) * | 2011-07-11 | 2014-04-02 | 北京交通大学 | Protocol conversion device and method for FlexRay bus and LIN bus |
| US9088514B2 (en) * | 2012-07-23 | 2015-07-21 | Broadcom Corporation | Flexray communications using ethernet |
| CN102756732B (en) * | 2012-07-27 | 2015-08-05 | 浙江吉利汽车研究院有限公司杭州分公司 | A kind of adaptive cruise control system of vehicle |
| CN102951159B (en) * | 2012-11-07 | 2016-06-15 | 浙江吉利汽车研究院有限公司杭州分公司 | Lane Departure Warning System |
| CN103179012A (en) * | 2013-03-05 | 2013-06-26 | 湖南开启时代电子信息技术有限公司 | FlexRay network node adopting iCoupler magnetic isolation protecting measures |
| FR3018650B1 (en) * | 2014-03-14 | 2017-08-25 | Aton Systemes | ETHERNET SWITCH, MOBILE MACHINE AND PASSENGER TRANSPORT BUS COMPRISING SAID ETHERNET SWITCH |
| CN107018151B (en) * | 2017-05-24 | 2021-02-09 | 宁波中车时代传感技术有限公司 | CAN-LonWorks protocol conversion method of programmable conversion logic |
| CN108173543A (en) * | 2017-12-26 | 2018-06-15 | 北京航天测控技术有限公司 | A kind of two-way isolation circuit of single-wire communication bus |
| CN109617921B (en) * | 2019-01-23 | 2020-07-07 | 北京交通大学 | Conversion device and method for FlexRay protocol and 802.11p protocol |
| CN110708226B (en) * | 2019-08-20 | 2022-05-27 | 北京泰豪装备科技有限公司 | Vehicle-mounted bus communication system based on FlexRay |
| CN114422294B (en) * | 2022-02-24 | 2023-12-01 | 浙江中控研究院有限公司 | Device for data interaction between FlexRay bus and BLVDS bus |
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| CN101309193A (en) * | 2008-06-13 | 2008-11-19 | 中国科学院电工研究所 | USB-Flexray bus adapter based on micro-processor |
| CN101741765A (en) * | 2008-11-21 | 2010-06-16 | 联创汽车电子有限公司 | vehicle-mounted gateway |
| EP2223472A1 (en) * | 2007-12-21 | 2010-09-01 | Bayerische Motoren Werke Aktiengesellschaft | Communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102006055514A1 (en) * | 2006-05-24 | 2007-11-29 | Robert Bosch Gmbh | Gateway for data transfer between serial buses |
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| EP2223472A1 (en) * | 2007-12-21 | 2010-09-01 | Bayerische Motoren Werke Aktiengesellschaft | Communication system |
| CN101309193A (en) * | 2008-06-13 | 2008-11-19 | 中国科学院电工研究所 | USB-Flexray bus adapter based on micro-processor |
| CN101741765A (en) * | 2008-11-21 | 2010-06-16 | 联创汽车电子有限公司 | vehicle-mounted gateway |
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