CN202077061U - Multi-port and multi-network protocol converter - Google Patents
Multi-port and multi-network protocol converter Download PDFInfo
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- CN202077061U CN202077061U CN 201120080646 CN201120080646U CN202077061U CN 202077061 U CN202077061 U CN 202077061U CN 201120080646 CN201120080646 CN 201120080646 CN 201120080646 U CN201120080646 U CN 201120080646U CN 202077061 U CN202077061 U CN 202077061U
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Abstract
The utility model discloses a multi-port and multi-network protocol converter, which comprises a main controller, an auxiliary controller, a random-access memory (RAM), a peripheral circuit and at least two protocol ports, wherein the main controller is connected with the auxiliary controller and is used for monitoring a system, realizing network protocol conversion and providing protocols and port configuration signals to the auxiliary controller; the auxiliary controller is connected with the main controller and is used for realizing a data link layer function, completing the establishment and the demolishing of a data link and realizing data error detection and correction functions; and the RAM is used for providing a space for data exchange. Conversion among multiple protocols is realized by adopting a processing method of combining a hardware circuit and a software program. The entire conversion process is completed at the physical layer and the data link layer of the network protocols. The multi-port and multi-network protocol converter supports simultaneous online conversion among multiple protocols. A source network protocol, a target network type and the number of source network protocol ports and target network protocol ports are dynamically configured according to application requirements to complete the conversion from the source network protocol to the target network protocol and to realize the seamless connection of communication among different protocols.
Description
Technical field
The utility model relates to industrial control field, is specifically related to the multiport multiple network protocol transducer that a kind of industry spot is used.
Background technology
In industrial production and automatic technology, the application of field bus communication system is increasingly extensive.Fieldbus is the communication network between factory's underlying device.The on-the-spot execution subscriber equipment that is provided with, interconnected as numerical control device, servo-driver, I/O module, transducer etc. by fieldbus, form the automatic control system that networking, digitlization, a standard-sized sheet are put, distributed entirely.
2007, International Electrotechnical Commission issued the 4th edition IEC61158 standard for Fieldbus, had adopted 20 kinds of buses as international standard.Different fieldbus have different applications, do not have a kind of standard for Fieldbus that is suitable for all control fields.Not exclusively compatible between each field bus protocol, cause the subscriber equipment on the different field bus protocols can not direct communication.Common method is to adopt industrial computer to add the field-bus interface card to realize bus communication.This scheme cost height, the construction cycle is long.
Chinese patent literature CN101741819.A has proposed the gateway apparatus of a kind of industrial control network and Ethernet conversion: this invention has proposed a kind of method that realizes the different agreement conversion in application layer.By a protocol conversion module, industrial control network is converted to IPv6, perhaps the Ethernet data bag is converted to industrial control network protocol data bag.By at application layer structure difference in functionality assembly, reach the protocol conversion purpose.In some field of industrial automation, as the numerical control device, servo-driver, these equipment require high to real-time property, and transmitted data amount is big.Realize that by software protocol conversion speed is slow, can't satisfy hard real time, high-speed requirement.
Chinese patent literature CN201174706.Y has proposed the device that a kind of FPGA of utilization realizes the conversion of Ethernet serial ports: this equipment is changed the serial ports fieldbus RS232/422/485 data-interface standard and the standard ethernet of extensive use in the industrial equipment mutually based on the FPGA technology.Utilize 32 soft nucleus CPUs and the related peripheral circuit of FPGA inside, finish the automatic conversion of Ethernet and serial ports.This protocol converter that utilizes the software and hardware resources design have higher real-time, but its function is simpler, has only realized the conversion of single Ethernet and serial ports, does not support the various protocols conversion.
Bus field at the scene at present, the bus of extensive use has CAN, EtherCAT, PROFINET, DeviceNet, SERCOS III.Different fieldbus transmission mediums is different, and as EtherCAT, PROFINET, NCUC-BUS transmission medium are twisted-pair feeder or optical fiber, and standard ethernet is supported twisted-pair feeder.The corresponding different hardware interface circuit of different transmission mediums.For realizing protocol conversion, need increase cost for the different hardware interface circuit of different bus designs.
Summary of the invention
A kind of multiport multiple network protocol transducer that the utility model provides, it can realize that common protocol changes mutually, possesses the general hardware interface circuit, has high-speed, hard real-time communication characteristics.
For achieving the above object, a kind of multiport multiple network protocol transducer that the utility model provides is characterized in that it comprises master controller, assistant controller, external RAM, peripheral circuit and at least two protocol ports;
Master controller links to each other with assistant controller, is used for system monitoring, realizes the procotol conversion, and provides agreement and port arrangement signal to assistant controller;
Assistant controller links to each other with master controller, is used to realize data link layer functions, finishes foundation, the dismounting of data link, realizes the EDC error detection and correction function of data;
External RAM is a chip external memory, links to each other with assistant controller with described master controller, is used to agreement to distribute the fixing memory block that data sent and received buffer memory that is used for, for the protocol data exchange provides the space;
Peripheral circuit is the system supplymentary circuit, is used to controller and network service chip that work clock is provided, and for controller provides debugging interface, and is the whole system power supply;
One end of each protocol port all links to each other with described assistant controller, and the other end all is used for linking to each other with subscriber equipment; Require protocol port to be defined as source protocol port and target protocol port according to protocol conversion.
Finish initial work after transducer powers on, enter running status then, realize protocol conversion process according to following process:
1. the source protocol port receives customer equipment data, and the assistant controller deal with data is removed data frame head and control information, and the source protocol valid data are put into the inner corresponding Data Receiving buffering area of assistant controller;
2. after Data Receiving was finished, master controller read the source protocol valid data of the Data Receiving buffering area of the inner correspondence of assistant controller successively according to the priority preset order, and puts into the pre-assigned Data Receiving buffering area of external RAM;
3. according to the priority orders of setting, master controller reads the Data Receiving buffer data of external RAM, successively the data of the frame head data of target protocol and external RAM Data Receiving buffering area is put into the transmission buffering area of the target protocol port that external RAM distributes; According to target protocol port logic address, search routing table, produce and send enable information to assistant controller;
4. assistant controller receives the transmission enable information, and the data that read external RAM send buffer data, and data are sent to the target protocol port, finish protocol conversion process one time.
The utility model can realize that various protocols changes mutually, and whole transfer process is finished in the physical layer and the data link layer of procotol.The utility model is supported various protocols online mutual conversion simultaneously.According to application requirements dynamic-configuration source network agreement and objective network type, source network protocol port and objective network protocol port quantity are finished the conversion of source network agreement to the objective network agreement, realize the seamless link of communicating by letter between the different agreement.Particularly, the utlity model has following beneficial effect:
1) the utility model has been realized the transition of communications between the different network protocol, has solved the interconnect problem of different classes of network;
2) for the intercommunication mutually between the various protocols provides a kind of efficient real-time processing method, realized the versatility of multiprotocol conversion;
3) the utility model has improved message transmission rate, has reduced communication delay.
Description of drawings
Fig. 1 is a multiport multiple network protocol transducer connection diagram;
Fig. 2 is a multiport multiple network protocol transducer hardware block diagram;
Fig. 3 is a multiport multiple network protocol transducer protocol conversion component group schematic diagram;
Fig. 4 is a multiport multiple network protocol transducer software module schematic diagram;
Fig. 5 is a multiport multiple network protocol transducer embodiment connection diagram;
Fig. 6 is a NCUC-BUS protocol data message form;
Fig. 7 is a multiport multiple network protocol transducer embodiment hardware structure diagram;
Fig. 8 is a multiport multiple network protocol transducer embodiment workflow diagram.
Specific implementation
Below in conjunction with instantiation and accompanying drawing, the utility model is elaborated.
Fig. 1 is the utility model multiport multiple network protocol converter structure schematic diagram.Subscriber equipment is outside input-output equipment, as industrial computer, and numerical control device, servo-driver, fieldbus instrument etc.When different subscriber equipmenies used different procotols to communicate, multiport multiprotocol conversion device was the agreement of output equipment with the protocol conversion of input equipment, and the communication between the assurance equipment is transparent.For this reason, the definition source protocol is promptly imported agreement for needing the procotol of conversion; The procotol of target protocol for obtaining, i.e. output protocol.
Fig. 2 is a hardware block diagram of the present utility model.The multiport multiple network protocol transducer that the utility model provides comprises master controller 1, assistant controller 2, external RAM 3, peripheral circuit 4 and protocol port 51,52,53 ... 5n, n are the positive integer more than or equal to 2.
The software module of master controller 1 comprises system initialization module 11 as shown in Figure 4, protocol conversion module 12, routing selecting module 13, system management module 14 and network management module 15.
The protocol port logical address is the address number that is used to distinguish the different port regulation of multiport multiple network protocol transducer, and the protocol conversion group represents that a source protocol is converted to the grouping set of a target protocol.
Routing selecting module 13 receives the data of protocol conversion module, and according to the target protocol port logic address that routing table selects data to send, sends data.The routing table of routing selecting module has been stored the logical address of each port, and the data of managing each protocol conversion group simultaneously send and receive buffering.
System management module 14 is used for port is configured and manages, and monitors the operating state of each port, comprises the port connection status, port shutdown and enabling, and port logic address assignment.
Network management module 15 is used to realize that the management frames of procotol handles, as arp reply in the ICP/IP protocol, and ping test, the three-way handshake of TCP connects etc.
Link layer interface module 21 receives the general message of each port, and valid data is put into the reception buffering area of port correspondence.According to sending control information of master controller 1, the link layer interface module sends target protocol port data message, and finishes the reception data and send data check.
Address ram administration module 22 is used to the Data Receiving buffering area of assistant controller 2 internal RAM modules 24 to produce control and address signal; Be external RAM 3 Data Receiving buffering areas and generation control of transmission buffering area and address signal.
Register module 23 is used for storage protocol conversion related register set point, and register comprises the network protocol type register, operating state register, input register and output register.
Internal RAM module 24 is used to finish the Data Receiving buffering in the assistant controller.There is embedded RAM assistant controller 2 inside, according to functional requirement, are the Data Receiving buffering area corresponding with protocol port with the internal RAM Module Division.
Network interface, an end links to each other with described network service chip, and the other end links to each other with described subscriber equipment, is used for data and sends and Data Receiving.Network interface requires configuration corresponding hardware interfaces circuit according to protocol transmission media type and The field separately.Transmission medium has types such as twisted-pair feeder, optical fiber, coaxial cable, the corresponding RJ45 of difference, multimode fiber module, coaxial fitting.
The network service chip, an end links to each other with described assistant controller 2, is the physical layer communication chip, is used for signal encoding and decoding, has the effect of coding, decoding input and output.
The hardware configuration of multiport multiple network protocol transducer has been described in the front, introduces concrete implementation method below:
The first step: initialization.Finish initial work after transducer powers on, comprise the initialization of register of described two controllers, memory, network service chip initiation.Source of configuration agreement and target protocol type, source protocol port and target protocol port number.
Second step: enter running status, realize protocol conversion process.Specifically comprise:
1) the source protocol port receives customer equipment data, and the assistant controller deal with data is removed data frame head and control information, and the source protocol valid data are put into the inner corresponding Data Receiving buffering area of assistant controller.Assistant controller is a kind of device that utilizes the made of hardware circuits which process data, supports parallel processing, so it can realize the various protocols conversion simultaneously.
2) after Data Receiving was finished, master controller read the source protocol valid data of the Data Receiving buffering area of the inner correspondence of assistant controller successively according to the priority preset order, and puts into the pre-assigned Data Receiving buffering area of external RAM.The purpose of setting priority is to avoid reading simultaneously multiple source protocol port data to cause access conflict.
3) according to the priority orders of setting, master controller reads the Data Receiving buffer data of external RAM, successively the data of the frame head data of target protocol and external RAM Data Receiving buffering area is put into the transmission buffering area of the target protocol port that external RAM distributes.According to target protocol port logic address, search routing table, produce and send enable information to assistant controller.
4) assistant controller receives the transmission enable information, reads the transmission buffer data, and data are sent to the target protocol port.Finish protocol conversion process one time.
Below in conjunction with instantiation, the ICP/IP protocol of using with NCUC-BUS field bus protocol and Ethernet is converted to example mutually, and with reference to the accompanying drawings, the utility model is elaborated.
The NCUC-BUS fieldbus is operated in master slave mode, and connection diagram as shown in Figure 5.This exemplary configuration NCUC-BUS protocol port is five, and the ICP/IP protocol port is that ethernet port is 1.The control unit of transfer of data is called main website on the leading bus of definition, as the numerical control device; The control unit of passive execution transfer of data is called slave station, and what they only allowed the confirmation request of passive response main website receives signal or direct forward signal, as the servo-driver in the numerical control system.
NCUC-BUS protocol data message form as shown in Figure 6, every frame data comprise 8 byte frames circle, mac source address, 6 byte source (MAC of main website), 6 byte MAC destination addresses (slave station MAC), 2 byte data length, 2 byte frame type identifications, the cycle main website frame transmission and the time of reception are poor on 2 bytes, 2 byte main website frame delivery times, configurable n byte slave station data, the check digit of 4 bytes.
Fig. 7 is the schematic diagram of this example.The utility model hardware component comprises master controller 1, assistant controller 2, and external RAM 3, peripheral circuit 4 and six protocol ports 5.
The network service chip is a physical chip, links to each other with described assistant controller 2, finishes input/output signal coding, decoding, has the effect of coding, decoding input and output.Network interface is a subscriber equipment physical connection interface, and an end links to each other with subscriber equipment, constitutes the protocol communication physical connection, is used for sending and receiving network signal.
51 1 ends link to each other with described subscriber equipment main website in five fiber ports, and 52,53,54,55 link to each other with described subscriber equipment slave station.The network interface of main website and slave station is the multimode fiber module.Transmission medium is an optical fiber, and communication speed is 100M.
The multimode fiber module adopts 1 * 9 multimode receiver-transmitter integrated module, and each optic module has transmission and receives two-way multimode fiber transmission path, adopts optical fiber as information transmission medium, and light signal is as the message transmission carrier.
Also comprise in the example:
Control bus, master controller 1, assistant controller 2 and external RAM 3 link to each other by a control bus; Master controller 1 links to each other by another control bus with assistant controller 2.
Address bus, master controller 1, assistant controller 2 and external RAM 3 link to each other by shared address bus.
Data/address bus, master controller 1, assistant controller 2 and external RAM 3 link to each other by the data shared bus.
In this example, the agreement of conversion is NCUC-BUS field bus protocol and ICP/IP protocol mutually, promptly realizes the mutual conversion of NCUC-BUS protocol data message and ICP/IP protocol data message, and its realization flow as shown in Figure 8.
The first step: system initialization.
After system powers on, finish initial work.Specify two kinds of protocol conversion groups according to configuration requirement, first group is configured to the NCUC-BUS agreement with source protocol, and target protocol is configured to ICP/IP protocol, and source of configuration protocol port number is 5, and the port logic address is 1,2,3,4,5.Configuration target protocol port number is 1, and the port logic address is 6.Second group is configured to ICP/IP protocol with source protocol, and target protocol is configured to the NCUC-BUS agreement, and the source protocol port number is 1, and the port logic address is 6.The target protocol port number is 5, and the port logic address is 1,2,3,4,5.Multiport multiprotocol conversion device has only one group of agreement to need conversion simultaneously, so, do not need to set conversion priority.Conversion group is the 3rd group and the tenth group among Fig. 3.
Second step: enter running status, realize protocol conversion process.Idiographic flow is as follows:
(1) the source protocol port receives data.According to interrupting information the data that receive are judged,, then carried out (two) if NCUC-BUS interrupts; If TCP/IP interrupts, then carry out (three).
(2) receive the NCUC-BUS protocol data, call link layer interface module.The NCUC-BUS protocol data frame is a kind of lump frame, and promptly the frame data that send of main website comprise all slave station data.Main website sends frame data to all slave stations, and the slave station return data is formed new frame data according to original data format and sent to main website.The data that each frame main website of FPGA link layer interface modules handle sends and the data of reception are removed data frame head and control information, call the Data Receiving buffering area that the address ram administration module is put into the slave station data FPGA internal RAM correspondence.
1) after Data Receiving was finished, FPGA produced a high level and interrupts to DSP.DSP detects interrupting information, reads the register of FPGA presentation protocol type, then the data of internal RAM Data Receiving buffering area, puts into the pre-assigned Data Receiving buffering area of external RAM.
2) finish the transfer of data from the FPGA internal RAM to external RAM after, the NCUC-BUS valid data that the DSP protocol conversion module receives buffering area with the frame head data of TCP/IP and external RAM are put into the pre-assigned TCP/IP of external RAM and are sent buffering area.Routing selecting module is TCP/IP port logic address 6 according to predefined target protocol port, searches routing table, produces transmission information to FPGA, writes the port logic address to output register, and data length sends and data such as enables.
3) FPGA receives transmission information, reads output register, and the ICP/IP protocol data are sent from No. 6 ports.
4) finish the conversion of NCUC-BUS agreement and ICP/IP protocol, wait for next frame NCUC-BUS data.
(3) receive the ICP/IP protocol data, call link layer interface module.FPGA link layer interface module is removed frame head information, utilizes the address ram administration module valid data to be put into the Data Receiving buffering area of FPGA internal RAM correspondence.
1) after Data Receiving was finished, FPGA produced a high level and interrupts to DSP.DSP detects interrupting information, reads the register of FPGA presentation protocol type, then the data of internal RAM Data Receiving buffering area, puts into the pre-assigned Data Receiving buffering area of external RAM.
2) in the DSP reading of data process, judge that the TCP/IP Frame is management frames or Frame.If management frames is then called network management module.To the ARP request, ping test, management information such as TCP connection request are replied processing.If Frame, the invocation protocol modular converter is put into the pre-assigned NCUC-BUS transmission of external RAM buffering area with the frame head data of NCUC-BUS and the TCP/IP valid data of external RAM reception buffering area.Routing selecting module is searched routing table according to predefined target protocol port, produces transmission information to FPGA, writes the port logic address to output register, and data length sends and data such as enables.
3) FPGA receives transmission information, reads output register, and the NCUC-BUS protocol data is sent to the intended target protocol port.
4) finish the conversion of NCUC-BUS agreement and ICP/IP protocol, wait for next frame TCP/IP data.
The utility model not only is confined to above-mentioned embodiment, and persons skilled in the art can adopt other multiple concrete execution modes according to embodiment and accompanying drawing disclosure.Therefore, every employing project organization of the present utility model and thinking are done some simple designs that change or change, and all fall into the scope of the utility model protection.
Claims (2)
1. a multiport multiple network protocol transducer is characterized in that, it comprises master controller (1), assistant controller (2), external RAM (3), peripheral circuit (4) and at least two protocol ports (5);
Master controller (1) links to each other with assistant controller (2), is used for system monitoring, realizes the procotol conversion, and provides agreement and port arrangement signal to assistant controller (2);
Assistant controller (2) links to each other with master controller (1), is used to realize data link layer functions, finishes foundation, the dismounting of data link, realizes the EDC error detection and correction function of data;
External RAM (3) is a chip external memory, links to each other with assistant controller (2) with described master controller (1), is used to agreement to distribute the fixing memory block that data sent and received buffering that is used for, for the protocol data exchange provides the space;
Peripheral circuit (4) is the system supplymentary circuit, is used to controller and network service chip that work clock is provided, and for controller provides debugging interface, and is the whole system power supply;
One end of each protocol port (5) all links to each other with described assistant controller (2), and the other end all is used for linking to each other with subscriber equipment; Require protocol port (5) to be defined as source protocol port and target protocol port according to protocol conversion.
2. multiport multiple network protocol transducer according to claim 1 is characterized in that protocol port (5) is made up of network interface and network service chip;
Network interface one end links to each other with an end of described network service chip, and the other end links to each other with described subscriber equipment, is used for data and sends and Data Receiving; Network interface requires configuration corresponding hardware interfaces circuit according to protocol transmission media type and The field separately;
The network service chip other end links to each other with described assistant controller (2), is used for signal encoding and decoding, has the effect of coding, decoding input and output.
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| CN 201120080646 CN202077061U (en) | 2011-03-24 | 2011-03-24 | Multi-port and multi-network protocol converter |
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| CN 201120080646 CN202077061U (en) | 2011-03-24 | 2011-03-24 | Multi-port and multi-network protocol converter |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170430A (en) * | 2011-03-24 | 2011-08-31 | 华中科技大学 | Multi-port multi-network protocol converter |
| CN103440219A (en) * | 2013-08-23 | 2013-12-11 | 上海航天测控通信研究所 | Novel general bus transforming bridge IP core |
| CN106657115A (en) * | 2016-12-30 | 2017-05-10 | 深圳市英威腾电气股份有限公司 | Frequency converter control system and protocol conversion card thereof |
| CN108809949A (en) * | 2018-05-21 | 2018-11-13 | 辽宁大学 | The method converted and dispatched between profinet, FF H1, CAN and profibus agreements |
| CN110347622A (en) * | 2019-06-05 | 2019-10-18 | 芜湖职业技术学院 | A kind of multiplex roles agreement bi-directional conversion device and implementation method |
| CN110545270A (en) * | 2019-08-21 | 2019-12-06 | 北京配天技术有限公司 | protocol conversion device, protocol conversion apparatus and method |
| CN113665248A (en) * | 2021-07-23 | 2021-11-19 | 广州众诺电子技术有限公司 | Consumable chip, consumable box and method for controlling communication of consumable chip |
| CN114003536A (en) * | 2021-10-19 | 2022-02-01 | 武汉华中数控股份有限公司 | Device and system for converting NCUC field bus into Anchuan M3 bus protocol |
-
2011
- 2011-03-24 CN CN 201120080646 patent/CN202077061U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170430A (en) * | 2011-03-24 | 2011-08-31 | 华中科技大学 | Multi-port multi-network protocol converter |
| CN103440219A (en) * | 2013-08-23 | 2013-12-11 | 上海航天测控通信研究所 | Novel general bus transforming bridge IP core |
| CN103440219B (en) * | 2013-08-23 | 2016-06-08 | 上海航天测控通信研究所 | A kind of versabus Bridge IP kernel |
| CN106657115A (en) * | 2016-12-30 | 2017-05-10 | 深圳市英威腾电气股份有限公司 | Frequency converter control system and protocol conversion card thereof |
| CN108809949A (en) * | 2018-05-21 | 2018-11-13 | 辽宁大学 | The method converted and dispatched between profinet, FF H1, CAN and profibus agreements |
| CN110347622A (en) * | 2019-06-05 | 2019-10-18 | 芜湖职业技术学院 | A kind of multiplex roles agreement bi-directional conversion device and implementation method |
| CN110545270A (en) * | 2019-08-21 | 2019-12-06 | 北京配天技术有限公司 | protocol conversion device, protocol conversion apparatus and method |
| CN113665248A (en) * | 2021-07-23 | 2021-11-19 | 广州众诺电子技术有限公司 | Consumable chip, consumable box and method for controlling communication of consumable chip |
| CN114003536A (en) * | 2021-10-19 | 2022-02-01 | 武汉华中数控股份有限公司 | Device and system for converting NCUC field bus into Anchuan M3 bus protocol |
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