CN201601689U - Master station device for controller area network application layer protocol - Google Patents
Master station device for controller area network application layer protocol Download PDFInfo
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- CN201601689U CN201601689U CN2009202724500U CN200920272450U CN201601689U CN 201601689 U CN201601689 U CN 201601689U CN 2009202724500 U CN2009202724500 U CN 2009202724500U CN 200920272450 U CN200920272450 U CN 200920272450U CN 201601689 U CN201601689 U CN 201601689U
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Abstract
The utility model provides a master station device for CAN (controller area network) application layer protocol. The master station device comprises a central processing module and a bus interface device, wherein a VxWorks system is mounted inside the central processing module, and the bus interface device is connected with the central processing module and an outer CAN bus and is used for protocol conversion between the central processing module and the CAN bus. By inserting the VxWorks system into the central processing module, the master station can process the data transmitted from the bus interface device and transmit the control information generated by the central processing module to the CAN bus through the bus interface device, so as to control equipment monitored by a CANopen master station device, ensure the requirement for real-time performance of the CANopen master station device, and improve the reliability of the CANopen master station device.
Description
Technical field
The utility model embodiment relates to the network equipment, relates in particular to a kind of controller area network application layer protocol master station device.
Background technology
The CANopen agreement be controller area network (Controller Area Network, hereinafter to be referred as: CAN) a kind of in the application layer protocol is widely used in the public transportation system.Controller area network application layer protocol master station device (hereinafter to be referred as the CANopen master station device) based on the CANopen agreement, it is a real-time monitoring equipment that is used to monitor train operation, CANopen master station device energy real-time response external event, train operating conditions is carried out continuous monitoring, guarantee not leak adopt, not omission so that provide real time information source accurately for train monitoring of working condition and failure diagnosis.
CANopen master station device of the prior art is realized usually in the following way: the embedded system that is used for deal with data and the operation of control train apparatus by standard C language development and Design one cover, realize non-preemptive type multi-task scheduling mechanism, thereby satisfy of the requirement of CANopen master station device real-time; Simultaneously, adopt single-chip microcomputer to move above-mentioned embedded system, and carry out transfer of data, each equipment in the train is monitored in real time to realize the CANopen master station device by single-chip microcomputer is connected with the CAN bus.
As mentioned above, the embedded system that prior art CANopen master station device uses adopts non-preemptive type multi-task scheduling mechanism, and be not suitable for all CANopen communication types, for example, when the CANopen master station device transmits by Service Data Object interface (Service Data Obiect) segment transmissions or piece, can cause the higher communication data of priority to wait for, thereby make that the real-time of CANopen master station device is relatively poor; Simultaneously, single-chip microcomputer can't provide the two-forty computing, and the speed of CANopen master station device deal with data is slow excessively.Therefore, the reliability of CANopen master station device of the prior art is relatively poor relatively.
The utility model content
Technical problem to be solved in the utility model is: a kind of controller area network application layer protocol master station device is provided, solves the relatively poor defective of CANopen master station device reliability in the prior art, realize improving the reliability of CANopen master station device.
The technical scheme that the utility model provides is that a kind of controller area network application layer protocol master station device comprises: central processing module is equipped with the VxWorks system;
Bus interface devices is connected with the CAN bus of described central processing module with the outside, is used for carrying out protocol conversion between described central processing module and described CAN bus.
The utility model embodiment controller area network application layer protocol master station device, by in central processing module, embedding the VxWorks system, make central processing module on basis based on the VxWorks system, data to the bus interface devices transmission are handled, and by bus interface devices the control information that central processing module generates is transferred to the CAN bus, the equipment of being monitored with control CANopen master station device.The VxWorks system is existing embedded system, has good flexibility, expandability and portability, can effectively satisfy the requirement of CANopen master station device to real-time; And the employing central processing module makes the CANopen master station device have data operation speed at a high speed, guarantees the requirement of CANopen master station device to real-time, thereby has improved the reliability of CANopen master station device.
Aforesaid controller area network application layer protocol master station device, described central processing module adopts Eurotech CPU-1452.
Aforesaid controller area network application layer protocol master station device, described bus interface devices is the CAN interface card, described CAN interface card is connected with described CAN bus communication with described central processing module respectively; Described CAN interface card is decoded the data of described CAN bus transfer, is transferred to described central processing module and uses; Described CAN interface card is also given described CAN bus with the transfer of data that described central processing module coding generates.
Aforesaid controller area network application layer protocol master station device, central processing module and described bus interface devices are communicated to connect for convenience, be provided with the PC/104 bus between described central processing module and the described bus interface devices, described central processing module and described bus interface devices communicated to connect by the PC/104 bus.
Aforesaid controller area network application layer protocol master station device in described VxWorks system, is provided with the control command sending module, is used for after described central processing module generates control command described control command being sent to described bus interface devices.
Aforesaid controller area network application layer protocol master station device, in described VxWorks system, also be provided with communication object and distribute distribution module, be used for being connected the process data object distributing independent communication object address of the monitored device on the described CAN bus.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the utility model controller area network application layer protocol master station device;
Fig. 2 is the structural representation of the central processing module in the utility model controller area network application layer protocol master station device.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the structural representation of the utility model controller area network application layer protocol master station device.As shown in Figure 1, present embodiment controller area network application layer protocol master station device (hereinafter to be referred as: the CANopen master station device), comprising: central processing module 1 and bus interface devices 2.
Particularly, present embodiment CANopen master station device adopts 1 pair of data of central processing module to carry out calculation process, thereby can effectively improve the processing speed of CANopen master station device, for the CANopen master station device provides the two-forty computing, make monitoring that the CANopen master station device can be real-time.Wherein, the central processing module in the present embodiment 1 can adopt Eurotech CPU-1452.Fig. 2 is the structural representation of the central processing module in the utility model controller area network application layer protocol master station device, as shown in Figure 2, the Eurotech CPU-1452 in the present embodiment mainly is made up of the loading plate of an intermediate layer CPU module and a PC/104-Plus structure.The CPU module can adopt
The 815E chipset uses
The 400MHz processor can integrated 256MB SDRAM on the plate.Wherein, all right integrated LCD demonstration of Eurotech CPU-1452,1 10/100Mbps network interface (Ethernet), an ide interface, two serial ports (UART), USB2.0 interface, WatchDog Timer and a PS/2 keyboard and a mouse interface etc.
In addition, the embedded system of central processing module 1 installation is the VxWorks system.Wherein, the VxWorks system is the real time operating system that U.S. Wind River System company releases.The VxWorks system can carry out its function in the time of determining, and the computer operating system that the asynchronous event of outside is responded.The VxWorks system provides between multiprocessor and the socket of semaphore, message queue, pipeline, network readezvous point efficiently between task.In addition, another key characteristic of VxWorks system is a hardware Interrupt Process, and in order to obtain the most rapid and reliable interrupt response, the interrupt service routine ISR of VxWorks system has the context of oneself.The VxWorks real time operating system is made up of more than 400 object modules relatively independent, short and small refining, and the user can select suitable module to come cutting and configuration-system as required, and this has guaranteed the fail safe and the reliability of system effectively.Vxworks operating system possesses real-time kernel efficiently, the VxWorks real-time kernel mainly comprise task scheduling, tasks synchronization based on priority and communicate by letter, Interrupt Process, timer and memory management.The VxWorks system comes the utilance of logger task to CPU by the run timing device, thereby adjusts effectively, rationally arranges the operation of task, given suitable task attribute.
Particularly, bus interface devices 2 in the present embodiment is used for carrying out protocol conversion transmission data between central processing module 1 and CAN bus, central processing module 1 is connected with the CAN bus communication, thereby the CANopen master station device can be monitored the equipment that will monitor on the train by the CAN bus.Bus interface devices 2 in the present embodiment can be the CAN interface card.The CAN interface card is connected with the CAN bus communication with central processing module 1 respectively; The CAN interface card is decoded the data of CAN bus transfer, is transferred to central processing module 1 and uses; The CAN interface card is also given the CAN bus with the transfer of data that central processing module 1 coding generates.Concrete, the CAN interface card with on the CANopen bus various data decode, deposit in the internal RAM, call for central processing module 1; Simultaneously, the CAN interface card can also read the data that are used to monitor that central processing module 1 coding generates, and these data are sent to the CANopen bus with the equipment on the monitoring train.
The utility model Embodiment C ANopen master station device, by in central processing module, embedding the VxWorks system, make central processing module on basis based on the VxWorks system, data to the bus interface devices transmission are handled, and by bus interface devices the control information that central processing module generates is transferred to the CAN bus, the equipment of being monitored with control CANopen master station device.VxWorks has good flexibility, expandability and portability, can effectively satisfy the requirement of CANopen master station device to real-time; And the employing central processing module makes the CANopen master station device have data operation speed at a high speed, guarantees the requirement of CANopen master station device to real-time, thereby has improved the reliability of CANopen master station device.
Based on technique scheme, optionally, central processing module 1 and bus interface devices 2 are communicated to connect for convenience, be provided with the PC/104 bus between central processing module 1 in the present embodiment CANopen master station device and the bus interface devices 2, central processing module 1 and bus interface devices 2 communicated to connect by the PC/104 bus.
Particularly, PC/104 is a kind of specification of the more employing of industrial embedded integrated circuit board.Present embodiment CANopen master station device adopts the PC/104 bus that central processing module 1 and bus interface devices 2 are communicated to connect, and makes the user can easily realize programming and expanding the ancillary equipment of standard.The ancillary equipment of these standards comprises video interface, memory device, keyboard, network interface, serial ports, parallel port, data acquisition module and some other special installations.In addition, central processing module 1 and bus interface devices 2 are linked together, make the structure of CANopen master station device more firm, thereby the CANopen master station device be may be used in the abominable applied environments such as strong vibration and strong bump by the PC/104 bus.
Based on technique scheme, optionally, in the VxWorks system, be provided with control command sending module (not shown), be used for after central processing module 1 generates control command, control command being sent to bus interface devices 2.Concrete, after central processing module 1 generated control command, the control command sending module by in the VxWorks system sent to bus interface devices 2 with control command, and by bus interface devices 2 control command is sent to the CAN bus.
Further, in the VxWorks system, can also be provided with communication object and distribute distribution module (not shown), be used for being connected the process data object distributing independent communication object address of the monitored device on the CAN bus.
The utility model CANopen master station device, by central processing module based on the VxWorks system, control command is sent to the CAN bus by bus interface devices, via the CAN bus control command is sent to controlled device, realize that the CANopen master station device carries out real-time monitoring to the equipment of required monitoring in the train.The CANopen master station device is responsible for process data object (PDO) the distributing independent communication object ID (COB-ID) of each monitor node, plays the effect of the monitor network in the configuration management train.The CANopen master station device also has the function of supervision slave station, thereby the CANopen master station device provides powerful disposal ability and computing capability, possesses good real time performance.Operate in the CANopen master station device that has on the Vxworks operating system Eurotech CPU-1452 platform, can finish CANopen master station device task, and software flexibility is strong, has good expandability and portability real-time stabilization.The CANopen master station device provides interface relatively flexibly, and effectively reduces use cost.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model has been carried out explanation in detail approximately with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (6)
1. a controller area network application layer protocol master station device is characterized in that, comprising:
Central processing module is equipped with the VxWorks system;
Bus interface devices is connected with the CAN bus of described central processing module with the outside, is used for carrying out protocol conversion between described central processing module and described CAN bus.
2. controller area network application layer protocol master station device according to claim 1 is characterized in that described central processing module is Eurotech CPU-1452.
3. controller area network application layer protocol master station device according to claim 1 is characterized in that described bus interface devices is the CAN interface card, and described CAN interface card is connected with described CAN bus communication with described central processing module respectively; Described CAN interface card is decoded the data of described CAN bus transfer, is transferred to described central processing module and uses; Described CAN interface card is also given described CAN bus with the transfer of data that described central processing module coding generates.
4. according to the arbitrary described controller area network application layer protocol master station device of claim 1-3, it is characterized in that, be provided with the PC/104 bus between described central processing module and the described bus interface devices, described central processing module and described bus interface devices communicated to connect by the PC/104 bus.
5. controller area network application layer protocol master station device according to claim 4, it is characterized in that, in described VxWorks system, be provided with the control command sending module, be used for after described central processing module generates control command, described control command being sent to described bus interface devices.
6. controller area network application layer protocol master station device according to claim 4, it is characterized in that, in described VxWorks system, also be provided with the communication object address assignment module, be used for being connected the process data object distributing independent communication object address of the monitored device on the described CAN bus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009202724500U CN201601689U (en) | 2009-11-24 | 2009-11-24 | Master station device for controller area network application layer protocol |
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| CN2009202724500U CN201601689U (en) | 2009-11-24 | 2009-11-24 | Master station device for controller area network application layer protocol |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429836A (en) * | 2015-12-15 | 2016-03-23 | 中国电子信息产业集团有限公司第六研究所 | Real-time EtherCAT master station system |
-
2009
- 2009-11-24 CN CN2009202724500U patent/CN201601689U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429836A (en) * | 2015-12-15 | 2016-03-23 | 中国电子信息产业集团有限公司第六研究所 | Real-time EtherCAT master station system |
| CN105429836B (en) * | 2015-12-15 | 2019-06-14 | 中国电子信息产业集团有限公司第六研究所 | A kind of real-time ethernet EtherCAT main station system |
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Granted publication date: 20101006 Termination date: 20111124 |