CN106131028A - A kind of data transmission method of Free-port communication gateway - Google Patents
A kind of data transmission method of Free-port communication gateway Download PDFInfo
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- CN106131028A CN106131028A CN201610569690.1A CN201610569690A CN106131028A CN 106131028 A CN106131028 A CN 106131028A CN 201610569690 A CN201610569690 A CN 201610569690A CN 106131028 A CN106131028 A CN 106131028A
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- serial ports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention provides the data transmission method of a kind of Free-port communication gateway, communication gate has multiple serial ports and at least one network interface, each serial ports has different serial ports number, it is characterized in that, comprise the following steps: each serial ports of communication gate is connected from different on-the-spot serial devices, by the network interface access industrial Ethernet system of communication gate；According to on-scene communication requirement, for the communication pattern required for the serial ports configuration that each and on-the-spot serial device is connected.After using the present invention, can realize 1 multiple, multiple serial device of gateway accessing to EPA, it is not necessary to consider concrete data sense, concrete communication protocol is defined by user oneself.And when communicating, serial data can be passed to far-end network exactly, far-end network can also monitor a certain serial device exactly.
Description
Technical field
The data transmission method of the present invention a kind of Free-port communication gateway, belongs to industrial communication technical field.
Background technology
Along with the rise of " Internet of Things " technology, most industry spot has covered complete network service, but still has deposited
At a lot of on-the-spot serial devices without network interface, it is impossible to carry out remote data communication by Ethernet, if these can be utilized
The data of serial device are carried out remote transmission by the existing network facilities, by the utilization rate of great extended serial equipment, and
Remotely monitored these field apparatus by Ethernet, also the development for " Internet of Things " provides a kind of passage.
At present, domestic many on-the-spot serial device, due to a variety of causes, does not use unified communication protocol to enter
Row data communication so that different serial device data cannot be processed by upper system, it is therefore desirable to a kind of Multi-serial port sets
Standby, energy access industrial Ethernet system, and solve communication protocol Diversification Problem.
Summary of the invention
It is an object of the invention to provide one have access to EPA system and solve communication protocol Diversification Problem
The data communications method of Multi-serial port equipment.
In order to achieve the above object, the technical scheme is that the data providing a kind of Free-port communication gateway are transmitted
Method, communication gate has multiple serial ports and at least one network interface, and each serial ports has different serial ports number, it is characterised in that
Comprise the following steps:
Step 1, each serial ports of communication gate is connected from different on-the-spot serial devices, the network interface of communication gate is accessed
EPA system；
Step 2, according to on-scene communication requirement, for the communication required for the serial ports configuration that each and on-the-spot serial device is connected
Pattern, the most on-the-spot serial device includes to the step of EPA system transfers data:
Being sent data by current live serial device to coupled current serial ports, the current serial ports of communication gate receives
After data, record the serial ports number of current serial ports, then configured according to current serial ports by the control unit within communication gate
The data received are converted to ethernet frame format data by the communication protocol that communication pattern is corresponding, and recycling network interface is by Ethernet
Frame format data are uploaded to EPA system；
The step that any ethernet device in EPA system sends data to the most on-the-spot serial device includes:
When communication gate receives after the ethernet frame format data of current ethernet device, inside communication gate
Control unit according to the communication gate communication protocol corresponding with the link information of current ethernet device by ethernet frame format
Data are converted to the free frame data that serial ports sends, and obtain serial ports number, recycling string according to the port information in free frame data
Slogan sends free frame data to the on-the-spot serial device being connected with corresponding serial ports.
Preferably, described communication pattern includes that TCP Server communication pattern, TCP Client communication pattern, UDP communicate
Pattern and real serial interface communication mode, if current serial ports is configured to TCP Server communication pattern, then corresponding by current serial ports
On-the-spot serial device include to the step of EPA system transfers data:
Communication gate, as the service end of TCP, monitors the visitor of all EPA systems by the local port configured
The connection of family end, and preserve the link address of all clients, after current serial ports receives the Frame that on-the-spot serial device sends,
Record receives the serial ports number of data, the Frame received is converted to the ethernet frame format data of Ethernet transmission, concurrently
Give all clients connected；
If current serial ports is configured to TCP Client communication pattern, then by on-the-spot serial device corresponding to current serial ports to
The step of EPA system transfers data includes:
Communication gate, as the client of TCP, is attempted connecting all mesh configured under this pattern in EPA system
The IP address service end corresponding with port, and preserve all link informations, current serial ports receives what on-the-spot serial device sent
After Frame, record receives the serial ports number of data, and the Frame received is converted to the ethernet frame format of Ethernet transmission
Data, and it is sent to all service ends connected；
If current serial ports is configured to UDP communication pattern, then by on-the-spot serial device corresponding to current serial ports to industry with
The too step of net system transfers data includes:
Communication gate binding local port, after current serial ports receives the Frame that on-the-spot serial device sends, record receives
The serial ports number of data, is converted to the Frame received the ethernet frame format data of Ethernet transmission, and is sent to this mould
The all long-range purpose IP address of the EPA system configured under formula and port；
If current serial ports is configured to real serial interface communication mode, then by on-the-spot serial device corresponding to current serial ports to industry
The step of Ethernet system transmission data includes:
EPA system is to provide the connection of client in the way of virtual serial port, and communication gate is as the clothes of TCP
Business end, by the connection of the client of fixing port snoop all EPAs system, and preserves the company of all clients
Ground connection location, after current serial ports receives the Frame that on-the-spot serial device sends, record receives the serial ports number of data, at CPU
Reason, is converted to the Frame received the ethernet frame format data of Ethernet transmission, and is sent to all visitors connected
Family end, after client receives ethernet frame data, according to the configuration of virtual serial port, maps the data into the virtual serial port of correspondence
End, thus realize the data communication of real serial ports.
After using the present invention, 1 multiple, multiple serial device of gateway accessing can be realized to EPA, it is not necessary to examine
Considering concrete data sense, concrete communication protocol is defined by user oneself.And when communicating, can be accurate by serial data
Really passing to far-end network, far-end network can also monitor a certain serial device exactly.
Accompanying drawing explanation
Fig. 1 is the hardware structure diagram of the communication gate used in the present invention；
Fig. 2 is communication construction figure；
Fig. 3 is mapping relations figure；
Fig. 4 is on-the-spot application drawing.
Detailed description of the invention
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
Fig. 1 is the hardware structure diagram of the communication gate used in the present invention, specifically includes: power module, processor
Module, ethernet module, serial interface module and other modules.Power module is inputted by external 24VDC, and internal conversion is
Required 5V, 3.3V drives power supply.CPU processor mainly realizes the configuration management of equipment, serial data communication and ether Netcom
Letter.Serial interface module includes the RS485 physical interface of 4 tunnel independences, for on-the-spot multichannel data parallel acquisition.Ethernet module
For configuring communication, serial link data communication and monitoring data communication；Other modules include display lamp, SR and buzzing
Device.
Functional configuration in Fig. 2 is the essential condition that this communication gate runs.Communication gate in the present invention supports 4 kinds of moulds
Formula: TCP Server communication pattern, TCP Client communication pattern, UDP communication pattern and real serial interface communication mode, Yong Huke
According to on-scene communication requirement, configure required communication mode.When, after selected a certain communication mode, user can be according to upper system
Communicating requirement and the transmission requirement of serial device, each independent serial ports is carried out parameter configuration and (includes the baud rate of serial ports
Purpose IP and the port that arrange, be transferred to far-end etc. parameter are arranged), can reach every road serial ports with different communication modes and far-end
Ethernet system carries out seamless data transmission.Configuration mode can use host computer configuration software, by the udp port of Ethernet,
Configuration message is sent to gateway device according to custom protocol, after gateway device receives configuration message and resolves, according to configuration
Parameter is operated.
In conjunction with Fig. 3, the data transmission method that the invention provides a kind of Free-port communication gateway comprises the following steps:
Step 1, each serial ports of communication gate is connected from different on-the-spot serial devices, the network interface of communication gate is accessed
EPA system；
Step 2, according to on-scene communication requirement, for the communication required for the serial ports configuration that each and on-the-spot serial device is connected
Pattern, (including that the parameter such as baud rate of serial ports arranges, is transferred to purpose IP of far-end and port is arranged), can reach every road serial ports
Seamless data transmission is carried out with different communication modes and far-end Ethernet system.Configuration mode can use host computer configuration soft
Part, by the udp port of Ethernet, is sent to gateway device by configuration message according to custom protocol, and gateway device receives joins
After putting message and resolving, it is operated according to configuration parameter.Configuration parameter is as shown in the table:
According to above-mentioned functions configuration and configuration parameter, form the mapping relations between serial device and Ethernet system.
As a example by serial ports 1, when the pattern configurations of serial ports 1 is TCP Server pattern, gateway as the service end of TCP,
Monitored the connection of all clients by the local port configured, and preserve the link address of all clients；When serial ports 1 end is received
After the Frame that RS485 equipment sends, record receives the serial ports number (such as serial ports 1) of data, by CPU process, is connect by serial ports
The free frame received is converted to the ethernet frame format of Ethernet transmission, and is sent to all Terminal Server Clients connected.
When the pattern configurations of serial ports 1 is TCP Client pattern, gateway, as the client of TCP, is attempted connecting this mould
The all purpose IP addresses configured under formula and port, and preserve all link informations；Send when serial ports 1 end receives RS485 equipment
Frame after, record receives the serial ports number (such as serial ports 1) of data, and by CPU process, the free frame received by serial ports is changed
The ethernet frame format transmitted for Ethernet, and it is sent to all remote service ends connected.
When the pattern configurations of serial ports 1 is UDP pattern, gateway binds local port；When serial ports 1 end receives RS485 equipment
After the Frame sent, record receives the serial ports number (such as serial ports 1) of data, by CPU process, the free frame received by serial ports
Be converted to the ethernet frame format of Ethernet transmission, and be sent under this pattern all long-range purpose IP address and the end of configuration
Mouthful.
When the pattern configurations of serial ports 1 is real serial ports pattern, ethernet side system is to provide visitor in the way of virtual serial port
The connection of family end, gateway is as the service end of TCP, by the connection of the fixing all clients of port snoop, and preserves all
The link address of client；When serial ports 1 end receive RS485 equipment send Frame after, record receive data serial ports number (as
Serial ports 1), by CPU process, the free frame received by serial ports is converted to the ethernet frame format of Ethernet transmission, and sends
To all Terminal Server Clients connected, after Terminal Server Client receives ethernet frame data, according to the configuration of virtual serial port, by number
According to being mapped to corresponding virtual serial port end, thus realize the data communication of real serial ports.
After ethernet side receives Ethernet data, according to link information and receiving port, system judges that serial ports number is believed
Breath, is converted to the free frame that serial ports sends simultaneously by the Frame of Ethernet protocol, and thus serial ports number is transmitted.
In above-mentioned steps, ethernet frame determination methods: judge that ethernet frame is the most just according to the ICP/IP protocol of standard
Really, and with this parse each layer data and process.
Free frame decision method: in order to ensure integrity and the correctness of Serial data receiving, gateway receives serial and sets
After the random length packet that preparation is sent, judge the knot of these bag data by the off time overtime 3～5ms of adjacent two bags
Bundle, specifically includes the transmission time of baud rate, the process time of CPU and the conversion time of hardware circuit.Wherein baud rate
The transmission time, calculating according to 9600bps, time transmit one byte needs is: 11bit/9600*1000=1.14ms.(its
Middle 11bit=start bit 1bit+ data bit 8bit+ stops position 1bit+ check bit 1bit).
Fig. 4 is on-the-spot application drawing, and by above method, 4 serial ports end datas can according to functional configuration and mapping relations table
Being sent to 4 kinds of different upper systems, upper system transmits data to specifically also dependent on functional configuration and mapping relations table
RS485 equipment on, thus realize the seamless communication of arbitrary data.
Claims (2)
1. a data transmission method for Free-port communication gateway, communication gate has multiple serial ports and at least one network interface, often
Individual serial ports has different serial ports number, it is characterised in that comprise the following steps:
Step 1, each serial ports of communication gate is connected from different on-the-spot serial devices, by the network interface access industrial of communication gate
Ethernet system；
Step 2, according to on-scene communication requirement, for the communication mould required for the serial ports configuration that each and on-the-spot serial device is connected
Formula, the most on-the-spot serial device includes to the step of EPA system transfers data:
Being sent data by current live serial device to coupled current serial ports, the current serial ports of communication gate receives number
According to rear, record the serial ports number of current serial ports, then the communication configured by the control unit within communication gate according to current serial ports
The data received are converted to ethernet frame format data by communication protocol corresponding to pattern, and recycling network interface is by ethernet frame lattice
Formula data are uploaded to EPA system；
The step that any ethernet device in EPA system sends data to the most on-the-spot serial device includes:
When communication gate receives after the ethernet frame format data of current ethernet device, by the control within communication gate
Unit processed according to the communication gate communication protocol corresponding with the link information of current ethernet device by ethernet frame format data
Be converted to the free frame data that serial ports sends, obtain serial ports number according to the port information in free frame data, recycle serial ports number
Free frame data are sent to the on-the-spot serial device being connected with corresponding serial ports.
The data transmission method of a kind of Free-port communication gateway the most as claimed in claim 1, it is characterised in that described communication mould
Formula includes TCP Server communication pattern, TCP Client communication pattern, UDP communication pattern and real serial interface communication mode, if
Current serial ports is configured to TCP Server communication pattern, then by on-the-spot serial device corresponding to current serial ports to EPA
The step of system transfers data includes:
Communication gate, as the service end of TCP, monitors the client of all EPA systems by the local port configured
Connection, and preserve the link address of all clients, after current serial ports receives the Frame that on-the-spot serial device sends, record
Receive the serial ports number of data, the Frame received is converted to the ethernet frame format data of Ethernet transmission, and is sent to
All clients connected；
If current serial ports is configured to TCP Client communication pattern, then by on-the-spot serial device corresponding to current serial ports to industry
The step of Ethernet system transmission data includes:
Communication gate, as the client of TCP, is attempted connecting all purposes IP configured under this pattern in EPA system
The service end that address is corresponding with port, and preserve all link informations, current serial ports receives the data that on-the-spot serial device sends
After frame, record receives the serial ports number of data, and the Frame received is converted to the ethernet frame format data of Ethernet transmission,
And it is sent to all service ends connected；
If current serial ports is configured to UDP communication pattern, then by on-the-spot serial device corresponding to current serial ports to EPA
The step of system transfers data includes:
Communication gate binding local port, after current serial ports receives the Frame that on-the-spot serial device sends, record receives data
Serial ports number, the Frame received is converted to the ethernet frame format data of Ethernet transmission, and is sent under this pattern
The all long-range purpose IP address of the EPA system of configuration and port；
If current serial ports is configured to real serial interface communication mode, then by on-the-spot serial device corresponding to current serial ports to industry ether
The step of net system transfers data includes:
EPA system is to provide the connection of client in the way of virtual serial port, communication gate as the service end of TCP,
By the connection of the client of fixing port snoop all EPAs system, and preserve the connection ground of all clients
Location, after current serial ports receives the Frame that on-the-spot serial device sends, record receives the serial ports number of data, by CPU process, will
The Frame received is converted to the ethernet frame format data of Ethernet transmission, and is sent to all clients connected,
After client receives ethernet frame data, according to the configuration of virtual serial port, map the data into the virtual serial port end of correspondence, thus
Realize the data communication of real serial ports.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610569690.1A CN106131028B (en) | 2016-07-19 | 2016-07-19 | A kind of data transmission method of Free-port communication gateway |
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| CN201610569690.1A CN106131028B (en) | 2016-07-19 | 2016-07-19 | A kind of data transmission method of Free-port communication gateway |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106814717A (en) * | 2017-01-25 | 2017-06-09 | 北京无线电测量研究所 | A kind of method and system for simplifying engineering control system communication based on EPA |
| CN108011813A (en) * | 2017-12-15 | 2018-05-08 | 江苏坤发信息科技有限公司 | One kind has programmable communication gate |
| CN109471826A (en) * | 2018-12-28 | 2019-03-15 | 安徽三人信息科技有限公司 | A kind of serial ports switching network transmitting device |
| CN112688844A (en) * | 2020-12-11 | 2021-04-20 | 北京天融信网络安全技术有限公司 | Communication control method, device, equipment and medium |
| CN114545906A (en) * | 2022-02-28 | 2022-05-27 | 奇瑞汽车股份有限公司 | Vehicle-mounted Ethernet gateway and vehicle |
| CN116647515A (en) * | 2023-04-14 | 2023-08-25 | 南京粒聚智能科技有限公司 | Edge computing gateway communication method with serial port communication forwarding function |
| CN118012808A (en) * | 2024-02-06 | 2024-05-10 | 东土科技(宜昌)有限公司 | Virtual serial port parameter configuration method and device, electronic equipment and storage medium |
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| CN101800652A (en) * | 2010-02-04 | 2010-08-11 | 深圳市金宏威实业发展有限公司 | Mode switching method and system of serial port and Ethernet and industrial Ethernet switch |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106814717A (en) * | 2017-01-25 | 2017-06-09 | 北京无线电测量研究所 | A kind of method and system for simplifying engineering control system communication based on EPA |
| CN106814717B (en) * | 2017-01-25 | 2019-05-17 | 北京无线电测量研究所 | A kind of method and system simplifying engineering control system communication based on Industrial Ethernet |
| CN108011813A (en) * | 2017-12-15 | 2018-05-08 | 江苏坤发信息科技有限公司 | One kind has programmable communication gate |
| CN109471826A (en) * | 2018-12-28 | 2019-03-15 | 安徽三人信息科技有限公司 | A kind of serial ports switching network transmitting device |
| CN112688844A (en) * | 2020-12-11 | 2021-04-20 | 北京天融信网络安全技术有限公司 | Communication control method, device, equipment and medium |
| CN114545906A (en) * | 2022-02-28 | 2022-05-27 | 奇瑞汽车股份有限公司 | Vehicle-mounted Ethernet gateway and vehicle |
| CN114545906B (en) * | 2022-02-28 | 2024-05-10 | 奇瑞汽车股份有限公司 | Vehicle-mounted Ethernet gateway and vehicle |
| CN116647515A (en) * | 2023-04-14 | 2023-08-25 | 南京粒聚智能科技有限公司 | Edge computing gateway communication method with serial port communication forwarding function |
| CN116647515B (en) * | 2023-04-14 | 2023-11-17 | 南京粒聚智能科技有限公司 | Edge computing gateway communication method with serial port communication forwarding function |
| CN118012808A (en) * | 2024-02-06 | 2024-05-10 | 东土科技(宜昌)有限公司 | Virtual serial port parameter configuration method and device, electronic equipment and storage medium |
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|---|---|
| CN106131028B (en) | 2019-07-05 |
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