CN202918326U - Intelligent multi-serial switch - Google Patents
Intelligent multi-serial switch Download PDFInfo
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- CN202918326U CN202918326U CN 201220581292 CN201220581292U CN202918326U CN 202918326 U CN202918326 U CN 202918326U CN 201220581292 CN201220581292 CN 201220581292 CN 201220581292 U CN201220581292 U CN 201220581292U CN 202918326 U CN202918326 U CN 202918326U
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Abstract
The utility model relates to an intelligent multi-serial switch. The switch comprises a bottom plate, a serial communication module, an optical-couple isolation module, a serial expansion module and an Ethernet card module which are arranged on the bottom plate, and a core plate, wherein the serial expansion module is connected with the core plate; the serial communication module is connected with the serial expansion module through the optical-couple isolation module; and the Ethernet card module is connected with the core plate. The intelligent multi-serial switch can realize data interaction between existing serial communication device and Ethernet. The switch is low in cost, and easy to use.
Description
Technical field
The utility model relates to the industrial control network field, particularly a kind of intellectual many serial ports switch.
Background technology
Along with evolution of computer networks, the rise of the Internet, increasing intelligent instrument access network has become a kind of trend.Can realize sharing and telemanagement of data behind the access network based on ethernet.But what at present most intelligent instrument used is that asynchronous serial communication interface is without network interface, so in the urgent need to a kind of protocol converter that asynchronous serial communication protocol can be converted to the Ethernet ICP/IP protocol.
In collecting and distributing type computer measurement and control field, many intelligent instruments will carry out combined network communication with host computer (being main frame), traditional solution is to add multi-serial-port card in computer, but the multi-serial-port card cost is high in the use procedure of reality, use is inconvenient, maintenance cost is also high, and serial communication is still having significant limitation aspect reliability, the transmission range.If realize communicating by letter even communicating with a plurality of main frames between numerous intelligent instrument and the remote host, multi-serial-port card is not competent, and can become very complicated based on the control network of RS-232C or RS-485 bus mode.
The utility model content
The purpose of this utility model is to provide a kind of intellectual many serial ports switch, can realize data interaction between existing 32 serial communication instruments and the Ethernet, and cost is low, and is easy to use.
To achieve the above object, the utility model provides a kind of intellectual many serial ports switch, comprises base plate, is arranged on serial communication module, light-coupled isolation module, serial ports expansion module and Ethernet card module on the described base plate, and core board; Described serial ports expansion module is connected with described core board; Described serial communication module is connected with described serial ports expansion module by described light-coupled isolation module; Described Ethernet card module is connected with described core board.
Above-mentioned intellectual many serial ports switch, wherein, described serial communication module is the serial communication interface that 32 road RS-422 differential currents drive, and comprises RS-422 bus driver AM26LS31 and RJ-45 socket; Described RJ-45 socket is connected with the external series communication Instrument, and described RS-422 bus driver AM26LS31 realizes conversion and the driving of the asynchronous communication logical AND RS-422 level of TTL/COMS level.
Above-mentioned intellectual many serial ports switch, wherein, described serial ports expansion module is comprised of 8 16C554A chips.
Above-mentioned intellectual many serial ports switch, wherein, described core board comprises processor, internal memory and flash memory; Described internal memory and flash memory all are connected with described processor; Described processor connects respectively described Ethernet card module and serial ports expansion module.
Above-mentioned intellectual many serial ports switch, wherein, the S3C2440A microprocessor that described processor 51 adopts take ARM920T as kernel, and operation (SuSE) Linux OS.
Above-mentioned intellectual many serial ports switch, wherein, described Ethernet card module comprises network interface card control unit interface chip DM9000AEP and with the HR911105A network interface seat of isolating transformer; Described HR911105A network interface seat with isolating transformer is connected with external host by Ethernet; Described network interface card control unit interface chip controls is described with the HR911105A network interface seat of isolating transformer and the transfer of data between the external host.
Above-mentioned intellectual many serial ports switch, wherein, described intellectual many serial ports switch also comprises USB and JIAG debugging module, described USB is connected with described core board with the JIAG debugging module.
Above-mentioned intellectual many serial ports switch, wherein, described intellectual many serial ports switch also comprises serially printing control desk module, described serially printing control desk module is connected with described core board.
Above-mentioned intellectual many serial ports switch, wherein, described intellectual many serial ports switch also comprises start-up mode selection module, described start-up mode selects module to be connected with described core board.
Use the intellectual many serial ports switch of the utility model, need not the conventional serial intelligent instrument is changed or upgraded, just many (for example 32) serial intelligent instrument access network based on ethernet can be carried out remote transmission and the processing of data by Ethernet, economical, quick.
Description of drawings
Intellectual many serial ports switch of the present utility model is provided by following embodiment and accompanying drawing.
Fig. 1 is the schematic diagram of intellectual many serial ports switch of the utility model embodiment.
Embodiment
Below with reference to Fig. 1 intellectual many serial ports switch of the present utility model is described in further detail.
Referring to Fig. 1, intellectual many serial ports switch of present embodiment comprises base plate 1, and serial communication module 2, light-coupled isolation module 3, serial ports expansion module 4, core board 5, USB and the JIAG debugging module 6, power module 7, the start-up mode that are arranged on the described base plate 1 are selected module 8, Ethernet card module 9 and serially printing control desk module 10;
Described serial ports expansion module 4 is connected with described core board 5, is used for expanding the serial communication interface of described core board 5;
Described serial communication module 2 is connected with described serial ports expansion module 4 by described light-coupled isolation module 3, and described serial communication module 2 is used for being connected with the external series communication Instrument, and described light-coupled isolation module 3 is used for the isolation of communication;
Described USB and JIAG debugging module 6, start-up mode are selected module 8, Ethernet card module 9 to be connected with serially printing control desk module all to be connected with described core board 5; Be implanted into program by described USB and JIAG debugging module 6 toward described core board 5; Described Ethernet card module 9 can be connected with external host by Ethernet; Described serially printing control desk module 10 is connected with outside host computer, can export described intellectual many serial ports switch modules running status to outside host computer;
Described power module 7 connects respectively described serial communication module 2, light-coupled isolation module 3, serial ports expansion module 4, core board 5, USB and JIAG debugging module 6, start-up mode is selected module 8, Ethernet card module 9 and serially printing control desk module 10, is used for the modules power supply to described intellectual many serial ports switch.
In the present embodiment, described serial communication module 2 is the serial communication interface that 32 road RS-422 differential currents drive, and comprises RS-422 bus driver AM26LS31 and RJ-45 socket; Described RJ-45 socket is used for being connected with the external series communication Instrument, and described RS-422 bus driver AM26LS31 is used for conversion and the driving of the asynchronous communication logical AND RS-422 level of realization TTL/COMS level.
In the present embodiment, described light-coupled isolation module 3 adopts the HCPL-2300 chip.
In the present embodiment, described serial ports expansion module 4 is comprised of 8 16C554A chips.
Continuation is referring to Fig. 1, and described core board 5 comprises processor 51, internal memory 52 and flash memory 53; Described internal memory 52 is connected with flash memory and all is connected with described processor 51; Described processor 51 connects respectively described serial ports expansion module 4, USB and JIAG debugging module 6, start-up mode is selected module 8, Ethernet card module 9 and serially printing control desk module 10.In the present embodiment, the S3C2440A microprocessor that described processor 51 adopts take ARM920T as kernel, and operation (SuSE) Linux OS; Described internal memory 52 adopts the HY57V561620FTP-H chip; Described flash memory 53 adopts the K9F2G08 chip.
In the present embodiment, described Ethernet card module 9 comprises network interface card control unit interface chip (DM9000AEP) and with the HR911105A network interface seat of isolating transformer; Described HR911105A network interface seat with isolating transformer can be connected with external host by Ethernet; Described DM9000AEP is used for controlling described HR911105A network interface seat with isolating transformer and the transfer of data between the external host.
Described core board 5, serial communication module 2, serial ports expansion module 4 and light-coupled isolation module 3 form serial data and process and the protocol conversion function module, finish from external series communication Instrument receive data, send data to outside serial communication instrument, data are processed and conversion work.
Described core board 5 and Ethernet card module 9 form network ICP/IP protocol conversion functional module, this part is mainly processed the data from network interface, carried out the reception of data and be transferred to microprocessor by network interface card control unit interface chip, microprocessor is finished parsing and the packing work of TCP/IP five layer protocols by being implanted in linux operating system above it.
When data mail to network interface from serial ports, processor 51 encapsulated and is transferred to the IP layer with the serial communication data bag that Ethernet sends in the buffering area (internal memory); When data mail to serial ports by network interface, processor 51 receives the data of Ethernets and begins analysis protocol, the work such as unpacks, isolate at last application layer data, then application layer data being consigned to serial data processes and the protocol conversion function module, data have so just been realized from the network interface to the serial ports, again the transmitted in both directions from the serial ports to the network interface.
The utility model software implemented is: programme so that external host and described intellectual many serial ports switch can carry out network service by socket, finish the conversion of Ethernet message and serial data form, become bridge mutual between Ethernet and the serial communication instrument.The task that described intellectual many serial ports switch is mainly finished: from the serial ports reading out data, by ICP/IP protocol, the serial data frame is converted to web socket (socket) form sends; Equally also can receive the data from networking client (external host), by transfer gateway web socket be become the serial data frame and send to serial ports.Described intellectual serial ports switch startup (SuSE) Linux OS also will move the program in the root file system automatically, for each serial ports is opened the two-way thread function, like this, when moving simultaneously, just opened 32 serial ports 64 tunnel thread function, and when network connection normally reaches client and do not disconnect, 64 tunnel thread function will can not finish.
The utility model has been developed a kind of many serial ports of embedded intelligence formula switch based on ARM9 and (SuSE) Linux OS, these intellectual many serial ports exchange functions are simultaneously with 32 serial intelligent instrument access network based on ethernet, and the Ethernet data bag that receives can accurately be unpacked, analyzes, the picking out data which serial intelligent instrument this mail to of intelligence, the data that also the serial intelligent instrument can be sent are simultaneously packed, and convert the Ethernet data bag to and send from Ethernet interface.
The S3C2440A microprocessor operation (SuSE) Linux OS of employing take ARM920T as kernel uses the 100MBase-T network effectively to carry out the transmission of data between serial device and remote host, adopted the design philosophy of layering.Adopt DM9000AEP ethernet controller chip commonly used in the embedded system as the network card chip of system in the design of hardware circuit, utilize the 16C554A chip of 8 TI companies to expand 32 road serial communication ports, consider in addition serial communication speed and the unmatched situation of ethernet communication speed, system has also expanded the SDRAM of 256M as the buffer memory of transfer of data.Adopt instantly newer linux kernel to carry out transplanting, the cutting of system at software, be directed to that intellectual serial ports private branch exchange system has been write the driving of 16C554A and the network card chip of DM9000AEP drives, be successfully completed the structure of embedded system.In order to realize the mutual transmission of 32 road serial port data and Ethernet data, and can allow the user feel just can directly to control any equipment in No. 32 serial devices by network.The design utilizes the powerful network support function of Linux, in conjunction with Linux multithreading and socket web socket programmed method, for each serial ports is opened the two-way thread function, one the tunnel is that the serial device data mail to Ethernet interface, and another road is the serial device that the Ethernet interface data mail to appointment.Just opened 64 tunnel thread function when system has 32 serial ports to move simultaneously like this, owing to be the up of each serial ports, independently thread function of two-way has all been opened in the transmission of downlink data separately, so the user can be at each local serial ports of long-range independently operation.
Intellectual many serial ports switch of the present utility model can increase network savvy for serial device, has high practical value, application prospect is boundless, can be applicable to the fields such as industrial automation, environment Real Time Monitoring, Smartway management, POS consume system, automatic building control system, intelligent domestic system, remote data acquisition and control.
Claims (9)
1. intellectual many serial ports switch is characterized in that, comprises base plate, is arranged on serial communication module, light-coupled isolation module, serial ports expansion module and Ethernet card module on the described base plate, and core board;
Described serial ports expansion module is connected with described core board;
Described serial communication module is connected with described serial ports expansion module by described light-coupled isolation module;
Described Ethernet card module is connected with described core board.
2. intellectual many serial ports switch as claimed in claim 1 is characterized in that, described serial communication module is the serial communication interface that 32 road RS-422 differential currents drive, and comprises RS-422 bus driver AM26LS31 and RJ-45 socket; Described RJ-45 socket is connected with the external series communication Instrument, and described RS-422 bus driver AM26LS31 realizes conversion and the driving of the asynchronous communication logical AND RS-422 level of TTL/COMS level.
3. intellectual many serial ports switch as claimed in claim 1 is characterized in that, described serial ports expansion module is comprised of 8 16C554A chips.
4. intellectual many serial ports switch as claimed in claim 1 is characterized in that described core board comprises processor, internal memory and flash memory; Described internal memory and flash memory all are connected with described processor; Described processor connects respectively described Ethernet card module and serial ports expansion module.
5. intellectual many serial ports switch as claimed in claim 4 is characterized in that, described processor (51) adopts the S3C2440A microprocessor take ARM920T as kernel, and the operation (SuSE) Linux OS.
6. intellectual many serial ports switch as claimed in claim 1 is characterized in that, described Ethernet card module comprises network interface card control unit interface chip DM9000AEP and with the HR911105A network interface seat of isolating transformer; Described HR911105A network interface seat with isolating transformer is connected with external host by Ethernet; Described network interface card control unit interface chip DM9000AEP control is described with the HR911105A network interface seat of isolating transformer and the transfer of data between the external host.
7. intellectual many serial ports switch as claimed in claim 1 is characterized in that, described intellectual many serial ports switch also comprises USB and JIAG debugging module, and described USB is connected with described core board with the JIAG debugging module.
8. intellectual many serial ports switch as claimed in claim 1 is characterized in that, described intellectual many serial ports switch also comprises serially printing control desk module, and described serially printing control desk module is connected with described core board.
9. intellectual many serial ports switch as claimed in claim 1 is characterized in that, described intellectual many serial ports switch also comprises start-up mode selection module, and described start-up mode selects module to be connected with described core board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220581292 CN202918326U (en) | 2012-11-07 | 2012-11-07 | Intelligent multi-serial switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220581292 CN202918326U (en) | 2012-11-07 | 2012-11-07 | Intelligent multi-serial switch |
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| CN202918326U true CN202918326U (en) | 2013-05-01 |
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| CN 201220581292 Expired - Fee Related CN202918326U (en) | 2012-11-07 | 2012-11-07 | Intelligent multi-serial switch |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616927A (en) * | 2013-11-08 | 2014-03-05 | 安徽康海时代科技有限公司 | Data communication server |
| CN104777850A (en) * | 2015-03-30 | 2015-07-15 | 中国电子科技集团公司第三十八研究所 | High-accuracy and splittable three-axis turntable control system |
| CN106406460A (en) * | 2016-08-31 | 2017-02-15 | 安徽康海时代科技股份有限公司 | Eight-serial port server with terminal |
-
2012
- 2012-11-07 CN CN 201220581292 patent/CN202918326U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616927A (en) * | 2013-11-08 | 2014-03-05 | 安徽康海时代科技有限公司 | Data communication server |
| CN103616927B (en) * | 2013-11-08 | 2017-07-07 | 安徽康海时代科技股份有限公司 | A kind of data communication server |
| CN104777850A (en) * | 2015-03-30 | 2015-07-15 | 中国电子科技集团公司第三十八研究所 | High-accuracy and splittable three-axis turntable control system |
| CN106406460A (en) * | 2016-08-31 | 2017-02-15 | 安徽康海时代科技股份有限公司 | Eight-serial port server with terminal |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20211107 |