CN104901877A - Multi-interface self-adaptive wireless heterogeneous network protocol conversion method and communication device - Google Patents
Multi-interface self-adaptive wireless heterogeneous network protocol conversion method and communication device Download PDFInfo
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Abstract
Provided is a multi-interface self-adaptive wireless heterogeneous network protocol conversion method and a communication device. The communication device comprises a processor connected with a SPI communication module, a RS485/RS232 serial communication module, a CAN communication module, an Ethernet interface communication module, a SDRAM internal storage unit, a Nand Flash memory, a WIFI wireless radiofrequency transceiver module, and a ZigBee wireless radiofrequency transceiver module via a bus. The processor is used for storing a conversion mapping relation among the interfaces by means of a mode control word, autonomously analyzing and scheduling corresponding resources, achieving conversion between multiple protocols and IEEE802.11 and 802.15.4 standard protocol and wired/wireless data analysis and forwarding. The multi-interface self-adaptive wireless heterogeneous network protocol conversion method achieves data forwarding functions between different wired interfaces and different wireless interfaces so as to achieve multi-protocol multi-interface intercommunicated characteristics.
Description
Technical field
The present invention relates to built-in isomerization network communication field, particularly relate to a kind of self adaptation conversion Wireless Heterogeneous Networks communication means and the device with multiplex roles.
Background technology
In industry spot, the mode of wire communication is adopted to need default engineering wiring conduit, construction cost is high, affect larger by geographical environment, be unfavorable for maintenance and secondary upgrading, the advantages such as cost is lower, easy construction, easy to maintenance, adaptability is good that adopt the mode of radio communication then to have.In addition, the bus interface used in industrial field bus is had nothing in common with each other, and therefore needs a kind of heterogeneous network communication device of integrated various protocols interface.
In existing communication technology, wire and wireless network interworking technology is very general.Such as: Chinese Patent Application No. is: 201120572125.3, name is called the patent of " Wireless Serial Communication device ", the arrangement achieves serial data mutually to change with the wireless network data based on IEEE802.11 standard, and by wireless communication module with carry out data communication based on the wireless network of IEEE802.11 standard and carry out data communication by serial ports and user's serial equipment, thus realize user's serial equipment and carry out radio communication by serial ports and based on the Wireless Communication Equipment of IEEE802.11 standard.But this device service condition is single, does not consider the communication issue between different bus interface.For another, Chinese Patent Application No. is: 201110423393.3, name is called the patent of " a kind of Multi-protocol multi-interface wireless sensor network gateway ", this device solves the problem of Wireless/wired data fusion in existing wireless sensor network by design agreement conversion program, but this device can not meet in industry spot and adopts RS485/RS232 bus, CAN, intelligent wire/wireless data communication between spi bus equipment and radio network gateway.
Above-mentioned known, existing electronic communication device due to equipment and principle too simple, and can not communicate with other different interface devices by intelligent selection interface mode, be difficult to the requirement adapting to current electronic communication industry or industry spot, so need a kind of new electronic communication device badly to solve the problem.
Summary of the invention
The object of the invention be to provide a kind of can intelligent selection interface mode, the adaptive Wireless Heterogeneous Networks method for converting protocol of multiplex roles independently completing different agreement conversion and communicator.
For achieving the above object, following technical scheme is adopted:
The adaptive Wireless Heterogeneous Networks of multiplex roles of the present invention includes spider lines and wireless network, cable network is connected to form by bus by SPI communication module, RS485/RS232 serial communication modular, CAN, Ethernet interface communication module and flush bonding processor, wireless network is connected to form by bus by WIFI radio frequency transceiving module and ZigBee radio frequency transceiving module and flush bonding processor, and flush bonding processor is separately connected with sdram memory unit, Nand flash storage;
Procotol conversion method of the present invention is as follows:
Mode control word must be comprised in every frame data of each interface, wherein first data byte of valid data frame is mode control word, flush bonding processor deposits the conversion map relation represented between each interface by mode control word, independently complete the analysis to respective resources and scheduling, utilize corresponding protocol convertor to realize various protocols and based on the protocol conversion between IEEE802.11 and 802.15.4 standard agreement and wire/wireless Data Analysis and forwarding, protocol convertor adopts multiplex mode, as flush bonding processor upper level applications and exist, after system starts, total interface in network is monitored, by listening state control word, read and identify user's request instruction, the value of the packet received first detected state control word also selects the communication mode matched, realize virtual communication logic pipeline, the protocol data reconstruct that automatic process completes between wireline interface is resolved, and SPI protocol and standard wireless network agreement, Ethernet protocol and standard wireless network agreement, CAN protocol and standard wireless communication agreement, conversion between RS485/RS232 protocols and standards wireless communication protocol, thus realize with spi bus interface, Ethernet interface interface, seamless data communication between the equipment of CAN interface or RS485/RS232 bus interface and remote terminal.
Wherein, described mode control word takies the memory headroom of a byte, wherein low 5 is active domain, represent RS485/RS232 interface enable from low to high respectively, CAN interface enable, SPI interface enable, Ethernet interface are enable, wireless enabled, corresponding binary representation is 00011111, and wherein 1 represent significance bit, 0 represents invalid bit, wherein 1 represent enable the corresponding interface, 0 represents anergy the corresponding interface; The conversion map relation represented between each interface is deposited by mode control word.
Carry out in mutual process in different agreement data, adopt memory-mapped mode, share same section of pre-assigned linear address between the interface intercomed mutually interval, thus reach for different user's requests, realize the wire/wireless data communication between different agreement.
Described logical pipe refers to that the data between distinct interface carry out real-time dynamic analysis reconstruct by processor, thus realizes the seamless communication mode not relying on concrete physical interface.
Communicator of the present invention is made up of flush bonding processor external connection module; Described external connection module comprises SPI communication module, RS485/RS232 serial communication modular, CAN, Ethernet interface communication module, sdram memory unit, Nand flash storage, WIFI radio frequency transceiving module and ZigBee radio frequency transceiving module; External connection module and flush bonding processor adopt bus connecting mode to be connected, built-in protocol convertor, SPI communication module, RS485/RS232 serial communication modular, CAN, Ethernet interface communication module are connected with respective interface equipment respectively, complete the Data Format Transform between the radio communication function of different interface devices and long-range host computer and distinct interface by WIFI radio frequency transceiving module and ZigBee radio frequency transceiving module.
Compared with prior art, tool of the present invention has the following advantages:
1, procotol conversion method can utilize protocol convertor to realize RS485/RS232, CAN, SPI, TCP/IP etc. to exchange between multiple interfaces data and the wireless network data based on IEEE802.11 and 802.15.4 standard, the Data Format Transform between multi-bus interface can also be realized simultaneously, thus reach with RS485/RS232 interface, CAN interface, Ethernet interface or SPI interface subscriber equipment and remote terminal radio communication and reduce costs with the object of the mutual communication between distinct interface.
2, communicator has the advantages such as volume is little, easy to use, expansion capability is strong, provides convenient, communication mode fast to different wireline equipments and remote terminal.
Accompanying drawing explanation
Fig. 1 is the network simplified schematic diagram of apparatus of the present invention.
Fig. 2 is the signal wiring block diagram of apparatus of the present invention.
Fig. 3 is that the state of a control word address of the inventive method maps chart.
Fig. 4 is the program flow diagram of the inventive method.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
Communicator of the present invention is made up of flush bonding processor external connection module; Described external connection module comprises SPI communication module, RS485/RS232 serial communication modular, CAN, Ethernet interface communication module, sdram memory unit, Nand flash storage, WIFI radio frequency transceiving module and ZigBee radio frequency transceiving module; External connection module and flush bonding processor adopt bus connecting mode to be connected, built-in protocol convertor, SPI communication module, RS485/RS232 serial communication modular, CAN, Ethernet interface communication module are connected with respective interface equipment respectively, complete the Data Format Transform between the radio communication function of different interface devices and long-range host computer and distinct interface by WIFI radio frequency transceiving module and ZigBee radio frequency transceiving module.
The network simplified schematic diagram that what Fig. 1 was apparatus of the present invention apply.The Wireless Heterogeneous Networks applied comprises wireline equipment and wireless device two kinds.Wireline equipment supports the equipment of the multiple interfaces such as RS485/RS232, CAN, SPI, TCP/IP; The equipment based on IEEE802.11 and 802.15.4 standard supported by wireless device.Above-mentioned wired and wireless device accesses communicator of the present invention, realizes the data communication between wireline equipment and wireless device and between each interface.
Fig. 2 is the signal wiring block diagram of apparatus of the present invention, and described communicator is made up of flush bonding processor external connection module; External connection module comprises SPI communication module, RS485/RS232 serial communication modular, CAN, Ethernet interface communication module, sdram memory unit, Nand flash storage, WIFI radio frequency transceiving module and ZigBee radio frequency transceiving module; External connection module and flush bonding processor adopt bus connecting mode to be connected, built-in protocol convertor, SPI communication module, RS485/RS232 serial communication modular, CAN, Ethernet interface communication module are connected with respective interface equipment respectively, complete the Data Format Transform between the radio communication function of different interface devices and long-range host computer and distinct interface by WIFI radio frequency transceiving module and ZigBee radio frequency transceiving module.Flush bonding processor runs built-in Linux operating system, unification is read and write and sheet selected control system each control module, docking port data are carried out resolving and are distributed, utilize protocol convertor to realize various protocols and based on the protocol conversion between IEEE802.11 and 802.15.4 standard agreement and wire/wireless Data Analysis and forwarding, complete the effective transmission of data on address bus and data/address bus.Flush bonding processor selects the frequency range that radio noise is less to carry out work according to around radio frequency environment information automatically, and WIFI network and ZigBee-network separate when choosing working frequency range, to ensure to cause the Communication Jamming between equipment as far as possible simultaneously.
Flush bonding processor is the core of whole heterogeneous network communication device, and its major function controls external connection module collaborative work as required, realizes the Acquire and process to data.Flush bonding processor of the present invention adopt atmel corp based on ARM926EJ-S core A T91SAM9G25 chip, integrated hardware capability peripheral hardware comprises: 1 ITU-RBT, 1 high-speed CAN main frame and CAN main frame be special upper transceiver at full speed, 1 10/100Mbps ethernet mac controller, two high speed storing card main frames, two master/slave Serial Peripheral Interface (SPI)s, two triple channel 32 bit timing device/counters, 4 passage 16 PWM controller, four USART, 2 UART, 10 analog to digital converters of 1 12 passage, 1 soft modem, 1 three two-wire interface etc.To sum up, the performance of AT91SAM9G25 flush bonding processor and abundant external interface can meet the requirement of heterogeneous network communication device.
RS485/RS232 serial communication modular is divided into serial ports 1 and serial ports 2, wherein serial ports 1 is connected with peripheral RS232 equipment by MAX3232 chip, realize with the ancillary equipment of RS232 interface and the exchanges data of heterogeneous network communication device, this serial ports can also realize the function that communication interface chooses configuration simultaneously.In the present invention, serial ports 2 is connected with ancillary equipment by isolation 485 chip, isolate 485 chips and select ADM2483, this chip is the enhancement mode RS485 transceiver of a band isolation that ADI releases, be applicable to the bidirectional data communication of multi-point bus transmission line, realize the exchanges data of ancillary equipment with RS485 interface and heterogeneous network communication device.
The design sets the preset parameter of this device by configuration serial ports, and the ethernet ip address of such as this equipment, WIFI enters net operation, 802.15.4 networking operation, twireless radio-frequency communication Frequency Band Selection, the interface communication speed of bus, the information such as master slave mode.
CAN realizes adopting CAN to carry out exchanges data with ancillary equipment and the heterogeneous network communication device of CAN communication interface, support master slave mode.
SPI communication module realizes adopting SPI to carry out exchanges data with ancillary equipment and the heterogeneous network communication device of SPI communication interface, support master slave mode.SPI communication module input signal cable in the present invention selects SPI0_MISO, and output signal line selects SPI0_MOSI, clock control line selection SPI0_SPCK, chip selection signal line selection SPI0_NPCS0.Utilize protocol convertor can receive the control command of user terminal, heterogeneous network communication device is configured to SPI holotype or SPI from pattern.
In Ethernet interface communication module, Ethernet chip adopts DM9161AEP, provides 10/100Mb/s data rate, realizes with the exchanges data between the equipment of Ethernet interface and multi-protocols multiplex roles heterogeneous network communication device.
WIFI radio frequency transceiving module adopts the rt3070 chip of MediaTek company, and support IEEE802.11g/b/n standard communication protocol, operating frequency is at 2.4-2.4835GHz, and transmission rate reaches as high as 150M.WIFI radio frequency transceiving module is connected with ARM center processor by USB interface, heterogeneous network communication device is connected to WIFI network by WIFI radio frequency transceiving module, realizes with the exchanges data between the equipment of WIFI agreement and multi-protocols multiplex roles heterogeneous network communication device.
ZigBee radio frequency transceiving module adopts the RF231 chip of atmel corp, the Zigbee protocol of support standard 802.15.4 agreement and expansion, ZigBee radio frequency transceiving module is connected by SPI and ARM center processor, heterogeneous network communication device is connected to ZigBee-network by ZigBee radio frequency transceiving module, realize, with the exchanges data between the equipment of standard 802.15.4 agreement and Zigbee protocol and multi-protocols multiplex roles heterogeneous network communication device, supporting that main website and slave station are arranged.
Heterogeneous network of the present invention includes spider lines and wireless network, cable network is connected to form by bus by SPI communication module, RS485/RS232 serial communication modular, CAN, Ethernet interface communication module and flush bonding processor, wireless network is connected to form by bus by WIFI radio frequency transceiving module and ZigBee radio frequency transceiving module and flush bonding processor, and flush bonding processor is separately connected with sdram memory unit, Nand flash storage; Described procotol conversion method is as follows:
Mode control word must be comprised in every frame data of each interface, wherein first data byte of valid data frame is mode control word, flush bonding processor deposits the conversion map relation represented between each interface by mode control word, independently complete the analysis to respective resources and scheduling, utilize corresponding protocol convertor to realize various protocols and based on the protocol conversion between IEEE802.11 and 802.15.4 standard agreement and wire/wireless Data Analysis and forwarding, protocol convertor adopts multiplex mode, as flush bonding processor upper level applications and exist, after system starts, total interface in network is monitored, by listening state control word, read and identify user's request instruction, the value of the packet received first detected state control word also selects the communication mode matched, realize virtual communication logic pipeline, the protocol data reconstruct that automatic process completes between wireline interface is resolved, and SPI protocol and standard wireless network agreement, Ethernet protocol and standard wireless network agreement, CAN protocol and standard wireless communication agreement, conversion between RS485/RS232 protocols and standards wireless communication protocol, thus realize with spi bus interface, Ethernet interface interface, seamless data communication between the equipment of CAN interface or RS485/RS232 bus interface and remote terminal.
Described mode control word takies the memory headroom of a byte, wherein low 5 is active domain, represent RS485/RS232 interface enable from low to high respectively, CAN interface enable, SPI interface enable, Ethernet interface are enable, wireless enabled, corresponding binary representation is 00011111, wherein 1 represent significance bit, 0 represents invalid bit, and concrete corresponding relation as shown in Figure 3, wherein 1 represent enable the corresponding interface, 0 represents anergy the corresponding interface; The conversion map relation represented between each interface is deposited by mode control word.
Carry out in mutual process in different agreement data, adopt memory-mapped mode, share same section of pre-assigned linear address between the interface intercomed mutually interval, thus reach for different user's requests, realize the wire/wireless data communication between different agreement.
Described logical pipe refers to that the data between distinct interface carry out real-time dynamic analysis reconstruct by processor, thus realizes the seamless communication mode not relying on concrete physical interface.As: external equipment connects this equipment by RS485 interface, binary representation through this packet mode control word of parsing is 00010001b, then represent that this bag data need wave point to forward, system starts execution RS485 and turns wireless program, and the rest may be inferred for all the other situations.
Specific implementation is as follows, when certain wireline interface need by data retransmission give multiple terminal equipment time, the signal procedure in the present invention distributes corresponding thread to different connections, realizes respective virtual communication logic pipeline in different threads.Such as remote equipment connects this equipment by Ethernet interface, and its IP address is respectively IP1:192.168.1.2, IP2:192.168.1.3.Wherein IP1 is that Ethernet interface turns RS485 interface, and IP2 is that Ethernet interface turns CAN interface.If signal procedure is 1 to the thread that IP1 distributes, the thread distributed to IP2 is 2, whether be so 00010001b by the mode control word of judgment frame in thread 1, in thread 2, whether be 00010010b by the mode control word of judgment frame thus judge that the Ethernet that the Ethernet of IP1 turns RS485 and IP2 turns CAN program and performs respectively.
Fig. 4 is the program flow diagram of the inventive method.Device of the present invention adopts built-in Linux operating system, has the support of multiple hardwares platform, the advantages such as excellent performance and good network support.The management to hardware resource and software resource well can be realized by (SuSE) Linux OS, and the scheduling to multiple task.Protocol convertor as heterogeneous network communication device upper level applications and exist, adopt multiplex mode, by listening state control word, read and identify user's request instruction, performing that corresponding serial ports turns wireless, SPI turns wireless, CAN turns wireless, Ethernet interface turns radio communication and wireline interface transition of communications program.Carry out in mutual process in different agreement data, adopt memory-mapped mode, share the same section of linear address be assigned with between the interface intercomed mutually interval, thus reach for different user's requests, realize the wire/wireless data communication between different agreement.This program circuit is as follows:
(1) system initialization, the communication interface parameter such as configuration network, serial ports, SPI, CAN;
(2) set up service end, monitor interface connection request, set up virtual link with respective distal end equipment;
(3) for each connection request creates thread, storage allocation mapping area;
(4) monitor interface data frame state control word, read client user's command information;
(5) decision instruction communication mode, performs corresponding signal procedure;
(6) having judged whether to stop signal procedure program command, as not having, then having returned step (4), if any, then the shared internal memory of release, closes current connection, terminates current thread;
(7) having judged whether EP (end of program) instruction, as not having, then having returned step (3), if any, then close all connections, EP (end of program).
Communicator of the present invention adopts corresponding interface and external equipment to carry out data interaction, and data are sent to flush bonding processor by corresponding bus, by (SuSE) Linux OS on flush bonding processor, protocol convertor is utilized the data after process to be resolved to the data format of the corresponding interface by application scenarios:
(1) if the conversion between wireline interface, program is forwarded to corresponding wireline interface after being reconstructed by the Data Analysis of acquisition.
(2) if wiredly turn wireless application, then radio frequency transceiving module encapsulates data into according to mode control word enable bit and follows respective standard protocol format and be sent to remote terminal.
(3) otherwise, remote terminal also can by control or configuration data, send to corresponding equipment by rightabout.
Protocol convertor as operating system upper level applications and exist, combine with the hardware of heterogeneous network communication device.Protocol convertor by judging the destination of data message, carrying out correct parsing, process and forwarding, realizing the communication of remote terminal and different interface devices after obtaining the data message of remote terminal.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection range that claims of the present invention determines.
Claims (6)
1. the adaptive Wireless Heterogeneous Networks communicator of multiplex roles, is characterized in that: described communicator is made up of flush bonding processor external connection module; Described external connection module comprises SPI communication module, RS485/RS232 serial communication modular, CAN, Ethernet interface communication module, sdram memory unit, Nand flash storage, WIFI radio frequency transceiving module and ZigBee radio frequency transceiving module; External connection module and flush bonding processor adopt bus connecting mode to be connected, built-in protocol convertor, SPI communication module, RS485/RS232 serial communication modular, CAN, Ethernet interface communication module are connected with respective interface equipment respectively, complete the Data Format Transform between the radio communication function of different interface devices and long-range host computer and distinct interface by WIFI radio frequency transceiving module and ZigBee radio frequency transceiving module.
2. the adaptive Wireless Heterogeneous Networks communicator of multiplex roles according to claim 1, is characterized in that: described flush bonding processor runs built-in Linux operating system.
3. the adaptive Wireless Heterogeneous Networks method for converting protocol of multiplex roles, it is characterized in that, described network comprises cable network and wireless network, cable network is connected to form by bus by SPI communication module, RS485/RS232 serial communication modular, CAN, Ethernet interface communication module and flush bonding processor, wireless network is connected to form by bus by WIFI radio frequency transceiving module and ZigBee radio frequency transceiving module and flush bonding processor, and flush bonding processor is separately connected with sdram memory unit, Nand flash storage; Described procotol conversion method is as follows:
Mode control word must be comprised in every frame data of each interface, wherein first data byte of valid data frame is mode control word, flush bonding processor deposits the conversion map relation represented between each interface by mode control word, independently complete the analysis to respective resources and scheduling, utilize corresponding protocol convertor to realize various protocols and based on the protocol conversion between IEEE802.11 and 802.15.4 standard agreement and wire/wireless Data Analysis and forwarding, protocol convertor adopts multiplex mode, as flush bonding processor upper level applications and exist, after system starts, total interface in network is monitored, by listening state control word, read and identify user's request instruction, the value of the packet received first detected state control word also selects the communication mode matched, realize virtual communication logic pipeline, the protocol data reconstruct that automatic process completes between wireline interface is resolved, and SPI protocol and standard wireless network agreement, Ethernet protocol and standard wireless network agreement, CAN protocol and standard wireless communication agreement, conversion between RS485/RS232 protocols and standards wireless communication protocol, thus realize with spi bus interface, Ethernet interface interface, seamless data communication between the equipment of CAN interface or RS485/RS232 bus interface and remote terminal.
4. a kind of method according to claim 3, it is characterized in that: described mode control word takies the memory headroom of a byte, wherein low 5 is active domain, represent RS485/RS232 interface enable from low to high respectively, CAN interface enable, SPI interface enable, Ethernet interface are enable, wireless enabled, corresponding binary representation is 00011111, and wherein 1 represent significance bit, 0 represents invalid bit, wherein 1 represent enable the corresponding interface, 0 represents anergy the corresponding interface; The conversion map relation represented between each interface is deposited by mode control word.
5. a kind of method according to claim 3, it is characterized in that: carry out in mutual process in different agreement data, adopt memory-mapped mode, same section of pre-assigned linear address is shared interval between the interface intercomed mutually, thus reach for different user's requests, realize the wire/wireless data communication between different agreement.
6. a kind of method according to claim 3, is characterized in that: described logical pipe refers to that the data between distinct interface carry out real-time dynamic analysis reconstruct by processor, thus realizes the seamless communication mode not relying on concrete physical interface.
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