CN106290943B - A kind of flow cytometer bus control device and method - Google Patents
A kind of flow cytometer bus control device and method Download PDFInfo
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Abstract
The present invention provides a kind of flow cytometer bus control devices, it is characterised in that：Including sensor unit, data acquisition unit, PCI E interfaces unit, slave computer interface unit, main control unit and host computer data receipt unit.The optical signal received is converted to electric signal by the sensor unit according to certain correspondence, the data acquisition unit realizes conditioning to the electric signal that sensor unit exports, and convert analog signals into corresponding digital signal, finally the pulse parameter for characterizing cell characteristics is extracted, then by uplink data sending in the form of PCI E bus protocols, the PCI E interface units realize the topological structure of PCI E buses, the quantity of PCI E interfaces is extended, realizes that the PCI E buses between main control unit and data acquisition unit and slave computer interface unit connect.
Description
Technical field
The present invention relates to the bus marco fields of flow cytometer, it is proposed that number between a kind of flow cytometer systems module
According to interactive bus mastering mode.
Background technology
The principle of flow cytometer is that single cell suspension enters streaming exposure cell after specific fluorescence dye dyes, and is being flowed
The analysis site of formula exposure cell, laser irradiation to cell occur scattering and refraction, launch scattering light, the fluorescein entrained by cell
It is excited and launches fluorescence, forward scattering light (FSC) and side scattered light (SSC).By electrooptical device by fluorescence and
Scattering light is converted into electric signal, and forward scattering light is converted into electric signal by photodiode, and side scattered light passes through photoelectricity times
Increasing is converted into electric signal, and fluorescence is then collected by concentrator, and the fluorescence of different colours turns to different photoelectricity times by double-colored reflective mirror
Increase pipe detector, fluorescence signal is converted into electric signal, scattered light signal and fluorescence signal are after amplification, using digitization
Processing inputs computer and stores, analyzed according to the scattering light and fluorescence of cell.
The degree of modularity of flow cytometer is very high, have sensor unit, data acquisition unit, PCI-E interface unit, under
Position machine interface unit, main control unit, host computer data receipt unit, the respective self-contained module of each unit, at this stage fluidic cell
Instrument multi parameter analysis is fast-developing, and analysis classification speed is accelerated, and the data volume of data acquisition unit is increasing, to bus bandwidth
More stringent requirements are proposed, and conventional flow cytometer bus is using parallel bus such as VME, and bus bandwidth is limited, expansible board
Quantity is few, and signal wire is more, and wiring difficulty increases.
Therefore, it is necessary to a kind of flow cytometer bus mastering mode device and method that can effectively solve the above problems.
Invention content
According to an aspect of the invention, there is provided a kind of flow cytometer bus control device, which is characterized in that described
Bus control device includes multiple sensor units, the multiple data being correspondingly connected with the multiple sensor unit acquisition list
Member, PCI-E interface unit, slave computer interface unit, main control unit and host computer data receipt unit, wherein the sensor
The optical signal received is converted to electric signal by unit according to certain correspondence；The data acquisition unit is to sensor list
The electric signal of member output realizes conditioning, and converts analog signals into corresponding digital signal, finally to characterization cell characteristics
Pulse parameter extracts, then by uplink data sending in the form of PCI-E bus protocols；The PCI-E interface unit is real
The topological structure of existing PCI-E buses, extends the quantity of PCI-E interface, realizes main control unit and data acquisition unit and slave computer
PCI-E buses connection between interface unit；PCI-E Data Format Transforms are slave computer bus by the slave computer interface unit
Format realizes that the instruction to main control unit controls；The main control unit realize the control received and dispatched to PCI-E bus datas and according to
Certain agreement is communicated with host computer data receipt unit；The host computer data receipt unit is with main control unit according to one
Fixed agreement is communicated, and realizes the reception of data and the transmission of various control instructions.
Preferably, the sensor unit is used in flow cytometer detection process and cell or the relevant scattering of microballoon
Light and fluorescence signal carry out opto-electronic conversion, are detected using different sensors according to the feature of all kinds of optical signals and intensity.
Preferably, the data acquisition unit is used to improve the simulation electric impulse signal that sensor unit exports,
By the electric impulse signal conditioning of wide dynamic characteristic to can be used for the simulation electric impulse signal of subsequent processing analysis, data acquisition is single
Member carries out analog/digital conversion to the simulation electric impulse signal after conditioning, and the simulation electric impulse signal after conditioning is converted to digital arteries and veins
Signal is rushed, data acquisition unit carries out calculation processing to the digital pulse signal, realizes the pulse of characterization cell or microballoon feature
The extraction of parameter.
Preferably, the PCI-E interface unit by main control unit, data acquisition unit and slave computer interface unit according to master
Slave pattern connects into PCI-E bus topolopies.
Preferably, the data pulse parameter of each data acquisition unit is stored in data buffer unit according to certain format, presses
It is transferred in the memory of main control unit through PCI-E ascendings by the PCI-E interface of data acquisition unit according to the mode of DMA；Respectively
The control command of circuit-switched data collecting unit is passed through in such a way that memory is read, memory is write by the PCI-E interface of data acquisition unit
PCI-E interface unit is transferred to main control unit；The data of the slave computer interface unit by memory read, memory write in the way of by
PCI-E interface in lower computer unit is sent to main control unit through PCI-E interface unit.
Preferably, the main control unit master realizes that data acquisition unit and slave computer interface unit are straight in a manner of principal and subordinate
The data interaction connect.The main control unit is sent in such a way that memory is read, memory is write to data acquisition unit and slave computer interface
The scattering light and fluorescence parameter of each data acquisition unit are stored in one piece of company by control command, main control unit in a manner of DMA
Main control unit handles the data of this block memory in continuous memory, and extraction relevant parameter is transferred to host computer data by Ethernet and connects
Unit is received, during data acquisition unit and slave computer interface unit are proposed in a manner of message signal interrupt to the CPU of main control unit
It is disconnected, it obtains interrupt vector CPU and can transfer interrupt service routine to be the unit service that request is interrupted.
Preferably, the PCI-E protocol instructions of main control unit are converted to corresponding slave computer by the slave computer interface unit
Protocol instructions, the slave computer protocol instructions mode realize instruction and the numbers such as the control of each main control unit 104, sensor states monitoring
According to transmission.
According to another aspect of the present invention, it provides a kind of for the total of such as above-mentioned flow cytometer bus control device
Line control method includes the following steps：
Single sensor unit carries out photoelectric conversion to multipath light signal, and selects difference according to the intensity properties of optical signal
Detection device of the sensor of type or model as optical signal；
Sensor unit is corresponded with data acquisition unit, and individual data collecting unit may be implemented and sensor unit
The parameter extraction of the identical photo-signal channel number of middle number of sensors；
The pulse parameter for being stored in data buffer zone of data acquisition unit processing passes through PCI-E interface unit and master control list
Realize that data transmission realizes the transmission of control command in a manner of memory read-write in a manner of DMA between member；
PCI-E interface unit completes the bus topolopy of PCI-E buses in the form of interchanger；
Main control unit, by the way that control command is transmitted to PCIe slave computer interfaces, is then solved by way of memory read-write
Analysis.
Flow cytometer bus control device according to the present invention may be implemented to be based on three generations's IO bus standard PCIe buses
Control, it is with the obvious advantage in terms of bandwidth with scalability.
It should be appreciated that aforementioned description substantially and follow-up description in detail are exemplary illustration and explanation, it should not
As the limitation to the claimed content of the present invention.
Description of the drawings
With reference to the attached drawing of accompanying, the more purposes of the present invention, function and advantage are by the as follows of embodiment through the invention
Description is illustrated, wherein：
Fig. 1 is the structural schematic diagram according to the flow cytometer bus control device of the present invention；
Fig. 2 is two kinds of exemplary block diagrams according to the data acquisition unit of the present invention；
Fig. 3 is the data acquisition unit PCI-E bus interface schematic diagrames according to the present invention；
Fig. 4 is the data acquisition unit PCI-E bus marco schematic diagrames according to the present invention；
Fig. 5 is more capture card control flow charts according to the main control unit of the present invention.
Specific implementation mode
Hereinafter, the embodiment of the present invention will be described with reference to the drawings.In the accompanying drawings, identical reference numeral represents identical
Or similar component or same or like step.
By reference to exemplary embodiment, the purpose of the present invention and function and the side for realizing these purposes and function
Method will be illustrated.However, the present invention is not limited to exemplary embodiment as disclosed below；Can by different form come
It is realized.The essence of specification is only to aid in the detail of the various equivalent modifications Integrated Understanding present invention.
It is described in detail for combination schematic diagram of the present invention, when describing the embodiments of the present invention, for purposes of illustration only, indicating
The sectional view of device architecture can disobey general proportion and make partial enlargement, and the schematic diagram is example, should not be limited herein
The scope of protection of the invention processed.In addition, three-dimensional space that should be comprising length, width and depth in actual fabrication.
Fig. 1 is the structural schematic diagram of flow cytometer bus control device according to the present invention, streaming according to the present invention
Cell instrument bus control device 100 includes first sensor unit 101, second sensor unit 102,3rd sensor unit
103, by HDMI physical interfaces by the first data acquisition unit 105, the second data acquisition unit 106, third data acquire single
Member 107 is connected with first sensor unit 101, second sensor unit 102,3rd sensor unit 103 respectively.Master control list
First 104, first data acquisition unit 105, the second data acquisition unit 106, third data acquisition unit 107 and slave computer connect
Mouthful unit 108 is inserted into PCI-E interface unit 109 by PCI-E interface, and main control unit 104 passes through ethernet netting twine and upper
Machine data receipt unit 110 connects.
The control based on three generations's IO bus standard PCIe buses of the flow cytometer bus control device of the present invention, in band
It is wide with scalability in terms of it is with the obvious advantage.
To achieve the above objectives, specifically, first sensor unit 101, second sensor unit 102,3rd sensor
The optical signal received is converted to electric signal, the first data acquisition unit by unit 103 according to certain correspondence respectively
105, the second data acquisition unit 106, third data acquisition unit 107 are respectively to first sensor unit 101, second sensor
The electric signal that unit 102,3rd sensor unit 103 export realizes conditioning, and converts analog signals into corresponding number letter
Number, finally the pulse parameter for characterizing cell characteristics is extracted, then pulse parameter from each data acquisition unit
PCIe interface uplink.
First data acquisition unit 105, the second data acquisition unit 106,107 respective PCI- of third data acquisition unit
E interface realize between main control unit 104 and data acquisition unit and main control unit 104 and slave computer interface unit 108 data and
Instruct the transmission according to PCI-E bus protocols.
PCI-E Data Format Transforms are that slave computer bus format is realized to main control unit 104 by slave computer interface unit 108
Instruction control, and various feedback informations are converted into PCI-E data formats and are transmitted to main control unit 104.
PCI-E interface unit 109 realizes the topological structure that PCI-E interface is realized with interchanger (Switch), extends PCI-E
The quantity of interface realizes that the PCI-E buses between main control unit 104 and data acquisition unit and slave computer interface unit 108 connect
It connects.
Main control unit 104 realizes the control received and dispatched to PCI-E bus datas and according to certain agreement and host computer data
Receiving unit 110 is communicated.
Host computer data receipt unit 110 is communicated with main control unit 104 according to certain agreement, realizes connecing for data
The transmission of receipts and various control instructions.
PCI-E Data Format Transforms are that slave computer bus format is realized to master control list by the slave computer interface unit 108
The instruction control of member 104；
Preferably, data acquisition unit, will be wide for improving the simulation electric impulse signal that sensor unit exports
The electric impulse signal conditioning of dynamic characteristic is that can be used for the simulation electric impulse signal of subsequent processing analysis, the data acquisition unit pair
Simulation electric impulse signal after conditioning carries out analog/digital conversion, and the simulation electric impulse signal after conditioning is converted to digit pulse letter
Number, data acquisition unit carries out calculation processing to the digital pulse signal, realizes the pulse parameter of characterization cell or microballoon feature
Extraction.Pulse parameter is stored in data buffer storage unit and according to the control instruction of main control unit 104 by the data acquisition unit
Pulse parameter is transferred to 104 corresponding data storage areas of main control unit through the PCI-E interface on data acquisition unit.
Preferably, first data acquisition unit 105, the second data acquisition unit 106, third data acquisition unit
107 are used for carrying out opto-electronic conversion with the relevant scattering light of cell or microballoon and fluorescence signal in flow cytometer detection process,
It is detected using different sensors according to the feature of all kinds of optical signals and intensity.
It is detected in general, the sensors such as photodiode, avalanche diode relatively can be used by force in scattered light signal；It is glimmering
Optical signal is relatively weak to be detected using photomultiplier (PMT).According to the difference of flow cytomery performance, sensor
The possible more than one of unit, above three sensor unit and corresponding three data acquisition units are also only the one of the present invention
A embodiment.Include more than one sensor in each sensor unit, each sensor is detected optical signal all the way.It passes
Sensor cell is corresponded with subsequent data acquisition unit.
Preferably, PCI-E interface unit 109 is by main control unit 104, data acquisition unit and slave computer interface unit 108
PCI-E bus topolopies are connected into according to master slave mode.Main control unit 104 is the ends RC, and data acquisition unit and slave computer connect
Mouth unit 108 is the ends EP, which, which can be a part for main control unit 104, can also individually become one
Absolute construction.
Preferably, the data pulse parameter of each circuit-switched data collecting unit is stored in data buffer unit according to certain format,
It is transferred to the memory of main control unit 104 through PCI-E ascendings by the PCI-E interface of data acquisition unit in the way of DMA
In.The control command of each circuit-switched data collecting unit is in such a way that memory is read, memory is write by the PCI-E interface of data acquisition unit
It is transferred to main control unit 104 through PCI-E interface unit 109.The data of slave computer interface by memory read, memory write in the way of by
PCI-E interface in lower computer unit is sent to main control unit 104 through PCI-E interface unit 109.
Preferably, main control unit 104 mainly realizes data acquisition unit and slave computer interface unit in a manner of principal and subordinate
108 direct data interactions.The main control unit 104 is in such a way that memory is read, memory is write to data acquisition unit and slave computer
Interface sends control command, and main control unit 104 is deposited the scattering light and fluorescence parameter of each data acquisition unit in a manner of DMA
The data that main control unit 104 in one piece of continuous memory handles this block memory are put into, extraction relevant parameter is transmitted by Ethernet
To host computer data receipt unit 110.Data acquisition unit and slave computer interface unit 108 are in a manner of message signal interrupt
It proposes to interrupt to the CPU of main control unit 104, obtains interrupt vector CPU and can transfer interrupt service routine to be the list that request is interrupted
Meta-service.
Preferably, the PCI-E protocol instructions of main control unit 104 are converted to corresponding bottom by slave computer interface unit 108
Machine protocol instructions, common slave computer protocol mode have RS232,485, eCan etc., which mainly realizes pair
Instructions and the transmission of data such as control, the sensor states monitoring of main control unit 104.
According to another aspect of the present invention, a kind of flow cytometer bus control method is additionally provided, is included the following steps：
Single sensor unit carries out photoelectric conversion to multipath light signal, and selects difference according to the intensity properties of optical signal
Detection device of the sensor of type or model as optical signal；
Sensor unit is corresponded with data acquisition unit, and individual data collecting unit may be implemented and sensor unit
The parameter extraction of the identical photo-signal channel number of middle number of sensors；
The pulse parameter for being stored in data buffer zone of data acquisition unit processing passes through PCI-E interface unit 109 and master
Realize that data transmission realizes the transmission of control command in a manner of memory read-write in a manner of DMA between control unit 104；
PCI-E interface unit 109 completes the bus topolopy of PCI-E buses in the form of interchanger；
Main control unit 104 by way of memory read-write by the way that control command is transmitted to PCIe slave computer interfaces, then
Parsing.
Fig. 2 is two kinds of exemplary block diagrams of data acquisition unit according to the present invention.In wherein Fig. 2 (a), data acquisition
Unit is sequentially connected including analog/digital conversion module, simulates electric pulse conditioning unit, parameter extraction module and data buffer storage unit；
In Fig. 2 (b), data acquisition unit is sequentially connected including simulating electric pulse conditioning unit, analog-to-digital conversion module, parameter extraction mould
Block, data buffer storage unit.The optical signal received is converted to electric signal, data by sensor unit according to certain correspondence
Collecting unit realizes conditioning to the electric signal that sensor unit exports, and converts analog signals into corresponding digital signal, connects
It and the pulse parameter for characterizing cell characteristics is extracted, the parameter of extraction is stored in data buffer storage list according to certain format
Member, the PCI-E interface module of data acquisition unit is in the form of DMA the pulse parameter in buffer unit from the ends EP PCIe interface
Transmit upstream to control unit.
Fig. 3 is the PCI-E bus interface schematic diagrames of data acquisition unit according to the present invention.The PCI- of data acquisition unit
E interface designs in fpga chip, and by ram in slice, dma control logic sends component, the application layer modules such as receiving part, with
And transaction layer, link layer, physical layer are constituted, and form a complete PCI-E bus interface.
Fig. 4 is according to the PCI-E bus marco schematic diagrames of the data acquisition unit of the present invention, the PCI- of data acquisition unit
After E interface electrification reset, TLP packets are received, the type of TLP packets is judged according to packet header type, is write if it is memory, according to reception
Address, judgement are DMA write commands or the control command that is sent to data collecting card, and control life is then parsed if it is control command
The work for enabling Control card, if it is command dma, then according to the TLP packets received, with parsing destination address, the source of DMA
Location, data length, then according to dma information tissue, one or more memory writes TLP packets, by the pulse parameter in data buffer storage
Data are sent to control unit, and after all data are sent, the memory that message signal interrupt is sent to control module writes number
According to packet, it is then back to.If TLP, which is memory, reads data packet, it is organized into data after the data of appropriate address are taken out
It completes packet and is sent to main control unit 104, then directly terminate to return.
After 108 electrification reset of slave computer interface unit, TLP data packets are received, the class of TLP packets is judged according to packet header type
Type is write if it is memory, and according to the address of reception, control command is sent to data collecting card, and reading then basis if it is memory connects
The address received sends the data in 108 register of slave computer interface unit to main control unit 104, is then back to.
Fig. 5 is according to more capture card control flow charts of the main control unit 104 of the present invention, and system initializes polylith after starting
Then capture card unit waits for host computer unit message, then carry out PCI-E write orders if it is order or PCI-E reads life
It enables, at this moment if port does not have occupied direct execution write operation.If executing DMA readings, directly controls program and send phase
Command dma is closed, the completion of interrupt latency data acquisition unit dma operation is opened simultaneously.It is then directly sent out if it is port read command
Read command is sent, the completion data packet with data is then waited for.It is directly clear if receiving PCI-E and interrupting to interrupt, then handle phase
Interrupt service routine is closed, is returned after the completion.
Host computer data receipt unit 110 is communicated with main control unit 104 according to certain agreement, realizes connecing for data
The transmission of receipts and various control instructions.
Flow cytometer bus control device according to the present invention may be implemented to be based on three generations's IO bus standard PCIe buses
Control, it is with the obvious advantage in terms of bandwidth with scalability.
Explanation in conjunction with the present invention disclosed here and practice, the other embodiment of the present invention is for those skilled in the art
It all will be readily apparent and understand.Illustrate and embodiment is regarded only as being exemplary, true scope of the invention and purport are equal
It is defined in the claims.
Claims (8)
1. a kind of flow cytometer bus control device, which is characterized in that the bus control device includes multiple sensor lists
Member, multiple data acquisition units, PCI-E interface unit, the slave computer to connect one to one with the multiple sensor unit connect
Mouth unit, main control unit and host computer data receipt unit, wherein
The optical signal received is converted to electric signal by the sensor unit according to certain correspondence；
The data acquisition unit includes sequentially connected analog/digital conversion module, simulation electric pulse conditioning unit, parameter extraction mould
Block and data buffer storage unit, the data acquisition unit realizes conditioning to the electric signal that sensor unit exports, and simulation is believed
Number be converted to corresponding digital signal, finally the pulse parameter for characterizing cell characteristics extracted, by the parameter of extraction according to
Certain format is stored in data buffer unit, then by uplink data sending in the form of PCI-E bus protocols；
The PCI-E interface unit realizes the topological structure of PCI-E buses, extends the quantity of PCI-E interface, realizes main control unit
PCI-E buses between data acquisition unit and slave computer interface unit are connect；
PCI-E Data Format Transforms are instruction of the slave computer bus format realization to main control unit by the slave computer interface unit
Control, wherein after the PCI-E interface electrification reset of data acquisition unit, receive TLP packets, TLP packets are judged according to packet header type
Type；
It is write if it is memory, according to the address of reception, judgement is DMA write command or the control sent to data collecting card life
It enables, the work of control command Control card is then parsed if it is control command, if it is command dma, then according to the TLP received
Packet, parses destination address, source address, the data length of DMA, then one or more memory is write according to dma information tissue
TLP packets send the pulse parameter data in data buffer storage to control unit, after all data are sent, to control mould
Block sends the memory data packets of message signal interrupt, is then back to；
If TLP, which is memory, reads data packet, it is organized into the completion packet with data after the data of appropriate address are taken out and sends
To main control unit, then directly terminate to return；
After slave computer interface unit electrification reset, TLP data packets are received, the type of TLP packets is judged according to packet header type；
It is write if it is memory, according to the address of reception, control command is sent to data collecting card, reading then basis if it is memory connects
The address received sends the data in slave computer interface unit register to main control unit, is then back to；
The main control unit realizes the control received and dispatched to PCI-E bus datas and according to certain agreement and host computer data receiver
Unit is communicated；
The host computer data receipt unit is communicated with main control unit according to certain agreement, realizes the reception of data and each
The transmission of kind control instruction.
2. flow cytometer bus control device according to claim 1, it is characterised in that：The sensor unit is used for
Opto-electronic conversion is carried out with the relevant scattering light of cell or microballoon and fluorescence signal in flow cytometer detection process, according to all kinds of
The feature and intensity of optical signal are detected using different sensors.
3. flow cytometer bus control device according to claim 2, it is characterised in that：The data acquisition unit is used
It is improved in the simulation electric impulse signal exported to sensor unit, is available by the electric impulse signal conditioning of wide dynamic characteristic
In subsequent processing analysis simulation electric impulse signal, the data acquisition unit to after conditioning simulation electric impulse signal carry out mould/
Simulation electric impulse signal after conditioning is converted to digital pulse signal by number conversion, and data acquisition unit believes the digit pulse
Number carry out calculation processing, realize characterization cell or microballoon feature pulse parameter extraction.
4. flow cytometer bus control device according to claim 1, it is characterised in that：The PCI-E interface unit
Main control unit, data acquisition unit and slave computer interface unit are connected into PCI-E bus topolopies according to master slave mode.
5. flow cytometer bus control device according to claim 1, it is characterised in that：The number of each data acquisition unit
It is stored in data buffer unit according to certain format according to pulse parameter, is connect by the PCI-E of data acquisition unit in the way of DMA
Mouth is transferred to through PCI-E ascendings in the memory of main control unit；The control command of each circuit-switched data collecting unit according to memory read,
The mode that memory is write is transferred to main control unit by the PCI-E interface of data acquisition unit through PCI-E interface unit；The slave computer
The data of interface unit are in such a way that memory is read, memory is write by the PCI-E interface in lower computer unit through PCI-E interface unit
It is sent to main control unit.
6. flow cytometer bus control device according to claim 1, it is characterised in that：The main control unit master is with master
From mode realize data acquisition unit and the direct data interaction of slave computer interface unit, which is read with memory,
The mode that memory is write sends control command to data acquisition unit and slave computer interface, and main control unit will be each in a manner of DMA
The scattering light and fluorescence parameter of a data acquisition unit are stored in main control unit in one piece of continuous memory and handle this block memory
Data, extraction relevant parameter are transferred to host computer data receipt unit, data acquisition unit and slave computer interface by Ethernet
Unit proposes to interrupt in a manner of message signal interrupt to the CPU of main control unit, and interruption clothes can be transferred by obtaining interrupt vector CPU
Business program is the unit service that request is interrupted.
7. flow cytometer bus control device according to claim 1, it is characterised in that：The slave computer interface unit
The PCI-E protocol instructions of main control unit are converted into corresponding slave computer protocol instructions, the slave computer protocol instructions mode is real
Instructions and the transmission of data such as the now control of each main control unit 104, sensor states monitoring.
8. a kind of bus control method for flow cytometer bus control device as described in claim 1, including it is following
Step：
Single sensor unit carries out photoelectric conversion to multipath light signal, and selects different type according to the intensity properties of optical signal
Or detection device of the sensor of model as optical signal；
Sensor unit is corresponded with data acquisition unit, and individual data collecting unit may be implemented to pass with sensor unit
The parameter extraction of the identical photo-signal channel number of sensor quantity；
Data acquisition unit processing be stored in the pulse parameter of data buffer zone by PCI-E interface unit and main control unit it
Between realize that data transmission realizes the transmission of control command in a manner of memory read-write in a manner of DMA；
PCI-E interface unit completes the bus topolopy of PCI-E buses in the form of interchanger；
Main control unit, by the way that control command is transmitted to PCIe slave computer interfaces, is then parsed by way of memory read-write；Under
PCI-E Data Format Transforms are that slave computer bus format realizes that the instruction to main control unit controls by position machine interface unit, wherein
After the PCI-E interface electrification reset of data acquisition unit, TLP packets are received, the type of TLP packets is judged according to packet header type；
It is write if it is memory, according to the address of reception, judgement is DMA write command or the control sent to data collecting card life
It enables, the work of control command Control card is then parsed if it is control command, if it is command dma, then according to the TLP received
Packet, parses destination address, source address, the data length of DMA, then one or more memory is write according to dma information tissue
TLP packets send the pulse parameter data in data buffer storage to control unit, after all data are sent, to control mould
Block sends the memory data packets of message signal interrupt, is then back to；
If TLP, which is memory, reads data packet, it is organized into the completion packet with data after the data of appropriate address are taken out and sends
To main control unit, then directly terminate to return；
After slave computer interface unit electrification reset, TLP data packets are received, the type of TLP packets is judged according to packet header type；
It is write if it is memory, according to the address of reception, control command is sent to data collecting card, reading then basis if it is memory connects
The address received sends the data in slave computer interface unit register to main control unit, is then back to.
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