CN109558362A - A kind of 422 interface baud rate self-adaptive serial communication plate of cpci bus - Google Patents
A kind of 422 interface baud rate self-adaptive serial communication plate of cpci bus Download PDFInfo
- Publication number
- CN109558362A CN109558362A CN201710888858.XA CN201710888858A CN109558362A CN 109558362 A CN109558362 A CN 109558362A CN 201710888858 A CN201710888858 A CN 201710888858A CN 109558362 A CN109558362 A CN 109558362A
- Authority
- CN
- China
- Prior art keywords
- serial communication
- communication plate
- cpci bus
- baud rate
- interface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/4013—Management of data rate on the bus
- H04L12/40136—Nodes adapting their rate to the physical link properties
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Quality & Reliability (AREA)
- Communication Control (AREA)
Abstract
The present invention relates to a kind of 422 interface baud rate self-adaptive serial communication plates of cpci bus, including sequentially connected fpga chip and photoelectric isolated chip, it further include 8 serial ports, the serial ports is RS422 interface, the serial communication plate connects computer motherboard by cpci bus, the computer motherboard connects CPU board, and the serial communication plate passes through the bridge connection communication socket on computer motherboard.Compared with prior art, the present invention connects the communications connector of computer by bridge, facilitates the enabling of redundancy serial ports, can be by changing bridge wiring, and confirmation is that failure has occurred in which serial ports, facilitates the serial communication board failure of positioning；In emergency circumstances, it can ensure that part-serial communication interface can work normally by changing bridge wiring, increase reliability of operation.
Description
Technical field
The present invention relates to ruggedized computer data communication fields, more particularly, to a kind of 422 interface baud rate of cpci bus
Self-adaptive serial communication plate.
Background technique
Now, general more mouthfuls of serial communication plates of 422 interface of cpci bus, size are mostly 6U, parameters be baud rate,
Data bit, stop position, check bit etc..General matched driving and software kit are also Linux editions.
The prior art has the following disadvantages:
If 1. 8 of serial communication data position not instead of standard, 7 of early stage ASCII coding, then serial logical
Letter plate can not just be handled；
2. if serial communication data is easy for that mistake occurs serial communication baud rate error is larger；
3. if some serial communication interface breaks down, not by computer outside other boards, then can not position therefore
Hinder interface number；
4. can only operate under (SuSE) Linux OS.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of cpci bus 422 to connect
Mouth baud rate self-adaptive serial communication plate.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of 422 interface baud rate self-adaptive serial communication plate of cpci bus, including sequentially connected fpga chip and light
It is electrically isolated chip, further includes 8 serial ports, the serial ports is RS422 interface.
Preferably, the serial communication plate connects computer motherboard by cpci bus, and the computer motherboard connects CPU
Plate.
Preferably, the serial communication plate passes through the bridge connection communication socket on computer motherboard.
Preferably, the communications connector is aviation socket, and quantity is 2.
Preferably, 4 connection aviation sockets in 8 serial ports, each communications connector are separately connected 2 serial ports.
Preferably, the fpga chip includes IP kernel.
Preferably, the quantity of the photoelectric isolated chip is 2.
Preferably, the size of the serial communication plate is 3U.
Compared with prior art, the invention has the following advantages that
1, the communications connector that computer is connected by bridge, facilitates the enabling of redundancy serial ports, can be bridged by change
Device wiring, confirmation are that failure has occurred in which serial ports, facilitate the serial communication board failure of positioning.
2, it in emergency circumstances, can ensure that part-serial communication interface can work normally by changing bridge wiring, increase
Reliability of operation is added.
It 3, can be by modifying the IP kernel internal program of serial communication plate, so that live can be modified simultaneously when technical documentation generation mistake
Row data bit width, increases fault-tolerant ability, it is convenient from the external equipment of the serial communication interface in all kinds of different each periods into
Row communication, increases the range for being applicable in external equipment.
Detailed description of the invention
Fig. 1 is apparatus of the present invention connection schematic diagram；
Fig. 2 is serial communication plate structural schematic diagram of the present invention；
Fig. 3 is invention software flow diagram.
It is marked in figure: 1, ruggedized computer, 2, serial communication plate, 3, bridge, 4, CPU board, 5, aviation socket, 21,
Fpga chip, 22, IP kernel, 23, photoelectric isolated chip.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment one
As shown in Fig. 2, a kind of 422 interface baud rate self-adaptive serial communication plate of cpci bus, including it is sequentially connected
Fpga chip 21 and photoelectric isolated chip 23, further include 8 serial ports, and serial ports is standard RS422 interface.Interface section uses photoelectricity
Isolating chip 23, to prevent excessive pressure damages board, in the present embodiment, the quantity of photoelectric isolated chip 23 is 2.Serial communication plate
2 size is 3U.
As shown in Figure 1, serial communication plate 2 connects computer motherboard by cpci bus, computer motherboard connects CPU board 4.
Serial communication plate 2 passes through the 3 connection communication socket of bridge on computer motherboard.
In the present embodiment, the motherboard of 2 reinforcement by connection computer 1 of serial communication plate, communications connector is aviation socket 5, number
Amount is 2.4 connection aviation sockets 5 in 8 serial ports, each communications connector are separately connected 2 serial ports.
Fpga chip 21 includes IP kernel 22, includes the program by digital signal modulated for sinusoidal signal in IP kernel 22.IP kernel
Baud rate used in program energy Auto-Sensing external equipment in 22 simultaneously carries out automatic adaptation.Serial communication plate has matched
Vxworks operating system driver, C Plus Plus form api interface function library, VxWorks application program call directly API letter
Number can be communicated with external equipment.When serial communication parameter is arranged in API Function, baud rate one need not be arranged,
Driver is voluntarily adapted to according to the information that IP kernel 22 in plate provides.
The present apparatus can change messaging parameter in IP kernel 22 and increase the range for being applicable in external equipment, can from it is all kinds of different each
The external equipment of the serial communication interface in period is communicated.Such as: the messaging parameter of some serial equipments is more special, some
The data bit of serial ports is 7, and some are 8；The ASCII coding of some equipment of serial communication slightly has with standard ASCII coding
Difference is bigger by 1 than standard ASCII coding 00001101 if the ASCII of the carriage return of some equipment is encoded to 00001110；Also
The high-order benefit of the ASCII coding of equipment component serial communication is 1, rather than 0, such as the ASCII coding of the carriage return of some equipment
It is 11111101, relative to standard ASCII coding 00001101, a high position is supplied with 1.
The working principle of the present apparatus are as follows:
1, external device data stimulus part:
After fpga chip 21 on serial communication plate 2 is to sampling of sinusoidal signal, then advanced row baud rate adaptation is demodulated into
Digital signal converts the signal to the signal of cpci bus protocol form by the program in IP kernel 22, is sent to CPU board 4；
The components such as CPU board 4 onboard CPU, GPU, memory, bus control unit, USB controller, lan controller, and be equipped with
Vxworks operating system；The vxworks operating system driver of serial communication plate 2 has received serial communication plate 2 and sends
Data, and data are saved to memory；Function reading in application call API function library reads data.
2, data-signal is output to external equipment:
Write-in function in application call API function library；The vxworks operating system of serial communication plate 2 drives journey
Sequence converts the data in memory to the signal of cpci bus protocol form, and digital signal modulated is sine by serial communication plate 2
Signal is sent to external equipment.
Claims (8)
1. a kind of 422 interface baud rate self-adaptive serial communication plate of cpci bus, which is characterized in that including sequentially connected FPGA
Chip and photoelectric isolated chip, further include 8 serial ports, and the serial ports is RS422 interface.
2. 422 interface baud rate self-adaptive serial communication plate of a kind of cpci bus according to claim 1, feature exist
In the serial communication plate connects computer motherboard by cpci bus, and the computer motherboard connects CPU board.
3. 422 interface baud rate self-adaptive serial communication plate of a kind of cpci bus according to claim 2, feature exist
In the serial communication plate passes through the bridge connection communication socket on computer motherboard.
4. 422 interface baud rate self-adaptive serial communication plate of a kind of cpci bus according to claim 3, feature exist
In the communications connector is aviation socket, and quantity is 2.
5. 422 interface baud rate self-adaptive serial communication plate of a kind of cpci bus according to claim 3, feature exist
In 4 connection communication sockets in 8 serial ports, each communications connector is separately connected 2 serial ports.
6. 422 interface baud rate self-adaptive serial communication plate of a kind of cpci bus according to claim 1, feature exist
In the fpga chip includes IP kernel.
7. 422 interface baud rate self-adaptive serial communication plate of a kind of cpci bus according to claim 1, feature exist
In the quantity of the photoelectric isolated chip is 2.
8. 422 interface baud rate self-adaptive serial communication plate of a kind of cpci bus according to claim 1, feature exist
In the size of the serial communication plate is 3U.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710888858.XA CN109558362A (en) | 2017-09-27 | 2017-09-27 | A kind of 422 interface baud rate self-adaptive serial communication plate of cpci bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710888858.XA CN109558362A (en) | 2017-09-27 | 2017-09-27 | A kind of 422 interface baud rate self-adaptive serial communication plate of cpci bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109558362A true CN109558362A (en) | 2019-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710888858.XA Pending CN109558362A (en) | 2017-09-27 | 2017-09-27 | A kind of 422 interface baud rate self-adaptive serial communication plate of cpci bus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111856522A (en) * | 2020-06-24 | 2020-10-30 | 深圳航天东方红海特卫星有限公司 | High-speed serial port power supply integrated tester for microsatellite |
-
2017
- 2017-09-27 CN CN201710888858.XA patent/CN109558362A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111856522A (en) * | 2020-06-24 | 2020-10-30 | 深圳航天东方红海特卫星有限公司 | High-speed serial port power supply integrated tester for microsatellite |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190402 |
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| WD01 | Invention patent application deemed withdrawn after publication |