CN110278032A - A kind of PCIe data transmitting device and method based on optical fiber - Google Patents
A kind of PCIe data transmitting device and method based on optical fiber Download PDFInfo
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- CN110278032A CN110278032A CN201910508379.XA CN201910508379A CN110278032A CN 110278032 A CN110278032 A CN 110278032A CN 201910508379 A CN201910508379 A CN 201910508379A CN 110278032 A CN110278032 A CN 110278032A
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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
- G06F13/4204—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus
- G06F13/4221—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being an input/output bus, e.g. ISA bus, EISA bus, PCI bus, SCSI bus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0026—PCI express
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Abstract
A kind of PCIe data transmitting device and method based on optical fiber, for the reset signal of mainboard and data-signal to be transmitted to one or more PCIe device by optical fiber, device includes PCIe golden finger, PCIe Switching Module, PCIe trunk module and SFP+ module, wherein: PCIe golden finger is used to be transmitted to SFP+ module by data signal transmission to PCIe Switching Module, and by reset signal；PCIe Switching Module is used to data-signal being distributed to PCIe trunk module；PCIe trunk module is used to carry out data-signal preemphasis processing and processing of postemphasising, and data-signal is sent to its SFP+ module connected by treated；SFP+ module is used for reset signal and treated data-signal is sent to its PCIe device for connecting through optical fiber.The data-signal and reset signal using optical fiber distance transmission PCIe are realized, and realizes more devices exchange functions, can be applied to the data-acquisition system of 10,000,000,000 transfer levels.
Description
Technical field
This disclosure relates to field of data transmission, and in particular, to a kind of PCIe data transmitting device and side based on optical fiber
Method.
Background technique
In fields such as high-energy physics, nuclear physics experiments, data-acquisition system need to acquire mass data in a short time, and will
The data of acquisition are transmitted to back-end server.With the rapid development of natural science, high-energy physics experiment and nuclear physics experiment exist
Collected data are more and more in same time, and data-acquisition system faces increasing data transmission pressure, compel to be essential
It will high speed, cheap, convenient reading method.Traditional reading method is to be transmitted to the data of front end electricity to be distributed in cabinet
Multiple data read plug-in unit, and by the core bus of cabinet by data summarization to crate controller, and will through the network switch
Data distribution is to server cluster.In traditional reading method, the network interface of case back plate bus and crate controller is limited
Message transmission rate, in face of the high speed data transfer demand of 10,000,000,000 ranks, traditional playback mode often uses multiple cabinets parallel
It reads, the cost of cost and complexity has been paid for reading speed.
PCI Express (PCIe) is the bus interface technology specification of a new generation, the transmission rate of single transmission channel
Up to 5GT/s, highest supports 16 transmission channels, however, PCIe is used for computer motherboard or case back plate, cannot achieve
Remote transmission.A kind of extension system of PCIe interface is disclosed in patent CN202889405U, is transmitted using coaxial cable
PCIe reset signal transmits PCIe data using optical fiber, realizes the extension of PCIe interface.But coaxial cable is unfavorable for growing
Distance applications, and its PCIe interface extends the connection for only supporting individual equipment, and it is logical with host simultaneously to cannot achieve multiple equipment
Letter.
Summary of the invention
(1) technical problems to be solved
Present disclose provides a kind of PCIe data transmitting device and method based on optical fiber, can satisfy 10,000,000,000 band above
Transmission demand, and long distance transmission may be implemented, additionally supports the connection of multiple equipment, and can be connected with flexible configuration
Connect the number of equipment and the link width of each connection equipment.
(2) technical solution
Present disclose provides a kind of PCIe data transmitting device based on optical fiber, for being believed the reset of mainboard by optical fiber
Number and data-signal be sent to one or more PCIe device, including PCIe golden finger, PCIe Switching Module, PCIe relay mould
Block and SFP+ module, in which: the PCIe golden finger is used for the data signal transmission to the PCIe Switching Module, and will
The reset signal is transmitted to the SFP+ module；The PCIe Switching Module is used to for the data-signal being distributed to described
PCIe trunk module；The PCIe trunk module is used to carry out preemphasis processing and processing of postemphasising to the data-signal, and
By the SFP+ module of treated data-signal is sent to its connection；The SFP+ module is used to pass through optical fiber for institute
State the PCIe device of reset signal and treated data-signal is sent to its connection.
Optionally, the PCIe Switching Module includes one or more first port and one or more second end
Mouthful, the first port is connected to the PCIe golden finger, and the second port is connected to the PCIe trunk module.
Optionally, the mainboard generation has the first clock signal, and the PCIe data transmitting device further includes clock jitter removing
Module and local clock module, the clock jitter removing module is for handling first clock signal and sending it to described the
Single port, the local clock module is for generating second clock signal and sending it to the second port.
Optionally, the first port is believed according to the data that first clock signal receives the PCIe golden finger transmission
Number, the second port receives the data-signal that the first port is distributed according to the second clock signal.
Optionally, the frequency of second clock signal is between 100MHz-300ppm~100MHz+300ppm.
Optionally, the PCIe data transmitting device further includes configuration file memory module, for storing the first end
The configuration information of mouth and second port, and the configuration information of storage first clock signal and second clock signal, so that
It obtains the PCIe Switching Module and the data-signal is distributed to by the PCIe relaying by the first port and second port
Module.
Optionally, the mainboard generation has first voltage, and the PCIe data transmitting device further includes power management module,
For the first voltage to be converted to one or more predeterminated voltage, and the predeterminated voltage is provided to the PCIe and is exchanged
Module.
Optionally, the SFP+ module includes RD+, RD-, TD+, TD- and TDIS pin, and the RD+ and RD-- are connected to
The reception differential signal line of the optical fiber, the TD+ and TD- are connected to the transmission differential signal line of the optical fiber, the TDIS
It is connected to the reseting signal line of the PCIe golden finger.
Optionally, the quantity of the PCIe trunk module is one or more, and each PCIe trunk module is connected with
One or more the SFP+ module.
The disclosure additionally provides a kind of data transmission method of above-mentioned PCIe data transmitting device based on optical fiber, for leading to
The PCIe device that reset signal and data-signal are transmitted to one or more by optical fiber is crossed, method includes: S1, obtains the reset
Signal and data-signal；The reset signal is transmitted to the SFP+ module of described device by S2；S3 passes the data-signal
The first port of the PCIe Switching Module of described device is transported to, the quantity of the first port is one or more；S4, described first
The data-signal is distributed to the second port of the PCIe Switching Module by port, the quantity of the second port be one and with
On；S5, second port PCIe trunk module connected to it into described device by the data signal transmission；S6, institute
It states PCIe trunk module and preemphasis processing and processing of postemphasising is carried out to the data-signal, and will described treated that data are believed
Number it is distributed to the SFP+ module；S7, the SFP+ module by optical fiber by the reset signal and it is described treated number
It is believed that number being sent to the PCIe device.
(3) beneficial effect
The PCIe data transmitting device and method based on optical fiber that the disclosure provides, at least have the advantages that
(1) it is based on PCIe high speed serialization agreement, is carried out data transmission using optical fiber, can satisfy the biography of 10,000,000,000 band above
Defeated demand, and distorted signal is repaired using PCIe trunk module, long distance transmission may be implemented；
(2) utilize PCIe Switching Module, can support the connection of multiple equipment, and can with flexible configuration number of devices and
The link width of each equipment；
(3) measured PCIe protocol, can compliant applications in the system of all PCIe, it is versatile；
(4) it only needs to cooperate PCIe data transmitting device and a common computer, 10,000,000,000 or more reading speed can be realized
Rate, cost is well below the reading cabinet with same transmission objective and reads plug-in unit.
Detailed description of the invention
Fig. 1 shows the application scenarios block diagram of the PCIe data transmitting device based on optical fiber of embodiment of the present disclosure offer.
Fig. 2 diagrammatically illustrates the structural frames of the PCIe data transmitting device based on optical fiber of embodiment of the present disclosure offer
Figure.
Fig. 3 shows the schematic diagram based on optical fiber transmission PCIe data and reset signal of embodiment of the present disclosure offer.
Fig. 4 diagrammatically illustrates the data link allocation plan figure of the PCIe Switching Module of embodiment of the present disclosure offer.
Fig. 5 diagrammatically illustrates the clock distribution approach figure of embodiment of the present disclosure offer.
The above-mentioned PCIe data transmitting device based on optical fiber that Fig. 6 diagrammatically illustrates embodiment of the present disclosure offer is counted
According to the flow chart of transmission.
Specific embodiment
For the purposes, technical schemes and advantages of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
The disclosure is further described in attached drawing.
First embodiment of the present disclosure provides a kind of PCIe data transmitting device (hereinafter referred to as PCIe number based on optical fiber
According to transmitting device), for the reset signal of mainboard and data-signal to be transmitted to one or more PCIe device by optical fiber.
Fig. 1 shows the application scenarios of PCIe data transmitting device in the disclosure.Computer motherboard refers to PCIe bus and corresponding
The business computer mainboard that slot and slot width are x16, further including the operation of the computers such as central processing unit and memory must
The part needed.PCIe data transmitting device is one piece of plug-in card with PCIe golden finger connector, has PCIe function of exchange,
PCIe can be extended by optical fiber.PCIe device refers to the equipment with PCIe optical fiber interface, is connected by optical fiber
To PCIe data transmitting device, in the disclosure, the quantity of PCIe device is one or more.PCIe data transmitting device passes through
PCIe golden finger is connected to computer motherboard, with receive the reset signal of computer motherboard, data-signal, the first clock signal with
And first voltage, and it is connected to by optical fiber one or more PCIe device, by optical fiber by reset signal and data-signal
It is distributed to each PCIe device.
Fig. 2 shows the structural block diagrams of PCIe data transmitting device in the disclosure, referring to Fig.2, in conjunction with Fig. 3 to Fig. 5, to this
PCIe data transmitting device is described in detail.
PCIe data transmitting device includes PCIe golden finger, PCIe Switching Module, PCIe trunk module, Small Form-Factor Pluggable
Transceiver (Small Form-factor Pluggable transceiver+, SFP+) module, power management module, clock are gone
Tremble module, local clock module and configuration file memory module.
PCIe golden finger is used to receive reset signal, data-signal, the first clock signal and first of computer motherboard
Reset signal after receiving above-mentioned signal, is transmitted to each SFP+ module by voltage, and data signal transmission to PCIe is handed over
Block is changed the mold, by the first clock signal transmission to clock jitter removing module, and by first voltage input power management module.
First voltage is converted to one or more predeterminated voltage by power management module, and the predeterminated voltage is provided to
PCIe Switching Module, one or more the predeterminated voltage are other power levels needed for PCIe Switching Module.
Clock jitter removing module handles the first clock signal received, to improve the quality of the first clock signal,
And by the first port of treated the first clock signal is sent to PCIe Switching Module.Local clock module is for generating second
Clock signal, and the second clock signal of generation is sent to the second port of PCIe Switching Module.
PCIe Switching Module is used to the data-signal received being distributed to PCIe trunk module, specifically, PCIe exchange
Module includes one or more first port (i.e. upstream port) and one or more second port (i.e. downstream port),
One or more the downstream port is connected to PCIe trunk module.Upstream port receives computer motherboard by PCIe golden finger
Data-signal, and receive and parse the data-signal that transmits of PCIe golden finger, upstream end according to the first clock signal
Mouth distributes data-signal to downstream port according to second clock signal, and downstream port is received and parsed according to second clock signal
The data-signal of upstream port distribution.
According to PCIe specification, signal necessary to PCIe is transmitted includes reset signal, data-signal and reference clock signal,
In the case where not using spread spectrum clock, reference clock signal need to only meet this condition of 100MHz ± 300ppm, PCIe transmission
Transmitting terminal and receiving end without using homologous clock, can need not consider between PCIe data transmitting device and PCIe device
Transmission reference clock signal is saved resource and is reduced costs.Therefore, in the present embodiment, the frequency of second clock signal is set
It is scheduled between 100MHz-300ppm~100MHz+300ppm.
In the present embodiment, using the PCIe exchange chip of Integrated Device Technology, Inc. model 89HPES24NT6AG2 as PCIe interchange mode
For block, illustrate the data link configuration of PCIe Switching Module, it is to be understood that Integrated Device Technology, Inc. or other public affairs can also be selected
Taking charge of has the PCIe exchange chip of similar functions as PCIe Switching Module.89HPES24NT6AG2 chip supports second generation PCIe
Specification provides the exchange capacity of 6 ports, 24 links and 192Gbps, meets the disclosure to the need of PCIe Switching Module
It asks.
Refering to Fig. 4,89HPES24NT6AG2 chip provides 6 ports, respectively port 0, port 2, port 4, port
6,4 lane are supported in port 8 and port 12, each port.In the present embodiment, port 0 and port 2 are bundled, are configured to
Upstream port is connected to PCIe golden finger, and therefore, upstream link width adds up to x8；In addition, by port 4, port 6, port 8
It is separately configured with port 12 as downstream port, altogether there are four downstream port, the link width of each downstream port is x4, this four
Downstream port is respectively connected to PCIe trunk module.In the present embodiment, such as select the DS80PCI402 conduct of PCIe repeater chip
PCIe trunk module, then each downstream port is connected to a corresponding DS80PCI402 chip, DS80PCI402 chip connection
To SFP+ module.
The above-mentioned lower PCIe data transmitting device run of data link configuration, four upstream devices of support while connection (and
PCIe device), each upstream device highest supports PCIe Gen2x4, wherein Gen2 refers to the slot using PCIe2.0 specification, x4
The data-bus width for referring to the slot is 4.In addition it is also possible to configuration data link otherwise, such as by port 4 and end
Mouth 6 merges into the downstream port of an x8 width, and port 8 and port 12 are merged into the downstream port etc. of an x8 width, this
When support to connect two upstream devices simultaneously, each upstream device highest support PCIe Gen2x8.Therefore, the PCIe of the disclosure
The link width flexibly configurable of data transmission device supported PCIe device number and each equipment, enhances PCIe in number
According to the expanded application in acquisition system.
89HPES24NT6AG2 chip needs to input two pairs of homologous differential clock signals of 0~0.7V as its overall situation reference
Clock, the present embodiment select the clock chip of the model ICS841484I of Integrated Device Technology, Inc. as local clock module,
Two pairs of differential clock signal output pins of ICS841484I chip need to be connected to two pairs of overall situations of 89HPES24NT6AG2 chip
Clock input pin.In addition, for example selecting the 9DB306 chip of Integrated Device Technology, Inc. as clock jitter removing module, can effectively be promoted
The input of 9DB306 chip is connected to PCIe golden finger by the quality of the first clock signal, to receive the first clock signal, and will
The output of 9DB306 chip is connected to the upstream port of 89HPES24NT6AG2 chip.
Refering to Fig. 5, the PCIe clock on computer motherboard be distributed to root complex (RootComplex, RC) and
PCIe slot, in order to be compatible with the spread spectrum clock that may be used, the upstream port of PCIe Switching Module, which uses, passes through PCIe golden finger
The PCIe reference clock of acquisition.Local clock chip IC S841484I on PCIe Switching Module provide two couples of 100MHz or
The configurable clock signal of 125MHz is connected to the global reference clock pin of PCIe exchange chip 89HPES24NT6AG2.?
89HPES24NT6AG2 chip interior, global reference clock are dispensed to each port, other than port 0 and port 2, institute
There is port to use PCIe reference clock of the global reference clock as port.Port 4, port 6, port 8 and port 12 are distinguished
Corresponding equipment 0, equipment 1, equipment 2 and equipment 3.The clock signal that 0~equipment of equipment 3 is all provided using equipment local clock chip
As PCIe reference clock.
89HPES24NT6AG2 chip also needs the power supply of tri- kinds of voltage of 1.0V, 2.5V, 3.3V, PCIe data transmitting device
Remaining electronic component be required to 3.3V power supply.By taking first voltage is 12V as an example, power management module uses two Switching Power Supplies
The 12V power supply that PCIe golden finger inputs is respectively converted into 1.0V and 3.3V by submodule, and power management module reuses a line
3.3V power supply is converted to 2.5V power supply by property power supply, thus provides complete power supply for PCIe data transmitting device.
The value of configuration register needed for configuration file memory module is used to provide its operation for PCIe Switching Module, so that
It obtains the PCIe Switching Module and data-signal is distributed to PCIe trunk module.
By taking PCIe Switching Module is 89HPES24NT6AG2 chip as an example, which can be read by SMBus bus matches
Confidence ceases, and selects the 24LC512 chip of MicroChip company as configuration file memory module, 24LC512 core in the present embodiment
The clock pins and data pins of piece are connected on the SMBus of 89HPES24NT6AG2 chip.It can be by 89HPES24NT6AG2
The link configuration information of chip is stored in 24LC512 chip, and after PCIe data transmitting device powers on, PCIe Switching Module is (i.e.
89HPES24NT6AG2 chip) these link configuration informations will be loaded automatically to work normally.In addition, each port uses the overall situation
The information of reference clock or externally input reference clock is also stored in configuration storage chip 24LC512.24LC512 core
The capacity of piece is 512K, can satisfy the configuration needs of 89HPES24NT6AG2 chip.
PCIe trunk module is used to carry out preemphasis processing and processing of postemphasising to data-signal, to realize conditioning PCIe
The purpose of data-signal guarantees that good form is presented in PCIe data signal after long-distance optical fiber transmits；PCIe relays mould
Also by treated, data-signal is sent to its SFP+ module connected to block.It should be noted that the quantity of PCIe trunk module
Be one or more, be connected to the downstream port of PCIe Switching Module, each PCIe trunk module be connected to one and with
On SFP+ module.
For PCIe data signal after long-distance optical fiber transmits, the signal of different frequency generates the decay of different amplitudes, leads
It causes signal distortion therefore to repair using PCIe trunk module to distorted signal in the disclosure, reaches the mesh of long distance transmission
, so that device has hundred meters or more of PCIe data transmittability.
In the present embodiment, such as select the DS80PCI402 chip of TI company as PCIe trunk module, for improving light
Optical fiber signaling.Data-signal from 89HPES24NT6AG2 chip passes through DS80PCI402 chip processing, is then transmitted to SFP
+ module.
SFP+ module is a kind of pluggable fiber optic transceiver module of compact package, is received by PCIe golden finger and resets letter
Number, and PCIe trunk module treated data-signal is received, and reset signal and data-signal are sent to its connection
PCIe device a, wherein PCIe device can connect to one or more SFP+ module, to extend its highway width.
It is deployed with SFP+ module on PCIe data transmitting device and PCIe device, PCIe data is transmitted by optical fiber and is filled
The SFP+ module of the SFP+ module and PCIe device set is attached.Refering to Fig. 3, the SFP+ module of PCIe data transmitting device is extremely
Less include RD+, RD-, TD+, TD- and TDIS pin, the SFP+ module of PCIe device include at least RD+, RD-, TD+, TD- and
This pair of of difference pin of LOS pin, RD+ and RD- is connected to the reception differential signal line of PCIe data link (i.e. optical fiber), TD+
This pair of of difference pin is connected to the transmission differential signal line of PCIe data link, the SFP of PCIe data transmitting device side with TD-
The TDIS pin of+module is connected to the reseting signal line of PCIe golden finger, the LOS pin connection of the SFP+ module of PCIe device side
To the reseting pin of PCIe device.
In the present embodiment, such as select the FTLF8528P3BxV module of FINISR company as SFP+ module, in order to improve
Integrated level, such as socket of the 1-2007637-5 connector of TE company as SFP+ is selected, which is double-layer structure, often
Layer can accommodate 2 SFP+.Reset signal on PCIe golden finger is connected to the DIS pin of SFP+ connector, is resetted with being fanned out to
Signal.
It is understood that the present embodiment is merely exemplary to propose some chips, each module, which also can be selected, has module institute
Need other chips of function.
Second embodiment of the present disclosure provides a kind of PCIe data transmitting device based in first embodiment and is counted
According to the method for transmission, for reset signal and data-signal to be transmitted to one or more PCIe device, the party by optical fiber
Method includes following operation:
S1 obtains reset signal and data-signal.
PCIe data transmitting device obtains reset signal and data-signal by its PCIe golden finger from computer motherboard,
In addition it is also necessary to obtain the first clock signal and first voltage.
Reset signal is transmitted to the SFP+ module of device by S2.
Reset signal is transmitted to SFP+ module by PCIe golden finger, in addition, PCIe golden finger also needs to input first voltage
Power management module, so that the first voltage is converted to one to power management module and the above PCIe data transmitting device works
Required voltage.
S3, by the first port of the PCIe Switching Module of data signal transmission to device, the quantity of the first port is one
It is a or more.
PCIe golden finger is by the first clock signal transmission to clock jitter removing module, and clock jitter removing module is to the first clock signal
After carrying out debounce processing, the first port of PCIe Switching Module is transmitted it to.
First port is the upstream port of PCIe Switching Module, and PCIe golden finger is by data signal transmission to PCIe interchange mode
The upstream port of block, according to treated, the first clock signal receives and parses the data-signal received to upstream port.
Data-signal is distributed to the second port of PCIe Switching Module by S4, first port, and the quantity of the second port is
One or more.
Local clock module generation in device has second clock signal, and the frequency of second clock signal is set in
When between 100MHz-300ppm~100MHz+300ppm, it may not be necessary to consider PCIe data transmitting device and PCIe device it
Between transmission reference clock signal, reduce costs.
Data-signal is distributed to the second port of PCIe Switching Module by first port, and second port is PCIe Switching Module
Downstream port, downstream port receives and parses the data-signal that receives according to second clock signal.
S5, second port PCIe trunk module connected to it into device by data signal transmission.
S6, PCIe trunk module carry out preemphasis processing and processing of postemphasising to data-signal, and general's treated data
Signal is distributed to SFP+ module.
PCIe trunk module carries out preemphasis processing and processing of postemphasising to data-signal, guarantee data-signal through it is too long away from
Good state is presented after transmitting from optical fiber.
S7, SFP+ module are by the way that optical fiber is by reset signal and treated that data-signal is sent to PCIe device.
In conclusion the PCIe data transmitting device and method based on optical fiber that the disclosure provides, realize the length of PCIe
It is transmitted apart from optical fiber, the specific PCIe high-speed transfer that can be achieved more than hundred meters is provided simultaneously with more devices exchange functions, and exchange side
Formula flexibly configurable can satisfy the high speed long range number of 10,000,000,000 or more the data-acquisition system of high-energy physics, nuclear physics experiment
According to transmission demand, and embodiments thereof are simple, and the implementation cost is low, are with a wide range of applications.
Particular embodiments described above has carried out further in detail the purpose of the disclosure, technical scheme and beneficial effects
Describe in detail it is bright, it is all it should be understood that be not limited to the disclosure the foregoing is merely the specific embodiment of the disclosure
Within the spirit and principle of the disclosure, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the disclosure
Within the scope of shield.
Claims (10)
1. a kind of PCIe data transmitting device based on optical fiber, for being passed the reset signal of mainboard and data-signal by optical fiber
One or more PCIe device, including PCIe golden finger, PCIe Switching Module, PCIe trunk module and SFP+ module are transported to,
Wherein:
The PCIe golden finger is used for the data signal transmission to the PCIe Switching Module, and the reset signal is passed
Transport to the SFP+ module；
The PCIe Switching Module is used to the data-signal being distributed to the PCIe trunk module；
The PCIe trunk module is used to carry out the data-signal preemphasis processing and processing of postemphasising, and by the processing
Data-signal afterwards is sent to the SFP+ module of its connection；
The SFP+ module is used for by the way that optical fiber is by the reset signal and described treated that data-signal is sent to its company
The PCIe device connect.
2. the PCIe data transmitting device according to claim 1 based on optical fiber, wherein the PCIe Switching Module includes
The second port of one or more first port and one or more, the first port are connected to the PCIe gold hand
Refer to, the second port is connected to the PCIe trunk module.
3. the PCIe data transmitting device according to claim 2 based on optical fiber, wherein when the mainboard generation has first
Clock signal, the PCIe data transmitting device further include clock jitter removing module and local clock module, the clock jitter removing module
For handling first clock signal and sending it to the first port, the local clock module is for generating second
Clock signal simultaneously sends it to the second port.
4. the PCIe data transmitting device according to claim 3 based on optical fiber, wherein the first port is according to
First clock signal receives the data-signal of the PCIe golden finger transmission, and the second port is according to the second clock signal
Receive the data-signal of the first port distribution.
5. the PCIe data transmitting device according to claim 3 based on optical fiber, wherein the frequency of the second clock signal
Rate is between 100MHz-300ppm~100MHz+300ppm.
6. the PCIe data transmitting device according to claim 3 based on optical fiber, wherein the PCIe data transmitting device
It further include configuration file memory module, for storing the configuration information of the first port and second port, and described in storage
The configuration information of first clock signal and second clock signal so that the PCIe Switching Module by the first port and
The data-signal is distributed to the PCIe trunk module by second port.
7. the PCIe data transmitting device according to claim 1 based on optical fiber, wherein the mainboard generation has the first electricity
Pressure, the PCIe data transmitting device further includes power management module, for the first voltage to be converted to one or more
Predeterminated voltage, and the predeterminated voltage is provided to the PCIe Switching Module.
8. the PCIe data transmitting device according to claim 1 based on optical fiber, wherein the SFP+ module include RD+,
RD-, TD+, TD- and TDIS pin, the RD+ and RD- are connected to the reception differential signal line of the optical fiber, the TD+ and TD-
It is connected to the transmission differential signal line of the optical fiber, the TDIS is connected to the reseting signal line of the PCIe golden finger.
9. the PCIe data transmitting device according to claim 1 based on optical fiber, wherein the number of the PCIe trunk module
Amount is one or more, and each PCIe trunk module is connected with one or more the SFP+ module.
10. a kind of transmission side data of the PCIe data transmitting device based on optical fiber as claimed in any one of claims 1-9 wherein
Method, for reset signal and data-signal to be transmitted to one or more PCIe device by optical fiber, method includes:
S1 obtains the reset signal and data-signal；
The reset signal is transmitted to the SFP+ module of described device by S2；
S3, by the first port of the PCIe Switching Module of the data signal transmission to described device, the quantity of the first port
It is one or more；
The data-signal is distributed to the second port of the PCIe Switching Module, the second port by S4, the first port
Quantity be one or more；
S5, second port PCIe trunk module connected to it into described device by the data signal transmission；
S6, the PCIe trunk module carry out preemphasis processing and processing of postemphasising to the data-signal, and by the processing
Data-signal afterwards is distributed to the SFP+ module；
S7, the SFP+ module is by the way that optical fiber is by the reset signal and described treated that data-signal is sent to is described
PCIe device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910508379.XA CN110278032B (en) | 2019-06-11 | 2019-06-11 | PCIe data transmission device and method based on optical fiber |
Applications Claiming Priority (1)
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