CN108647175A - A kind of multi-protocol data acquisition Small-sized C PCI board card - Google Patents
A kind of multi-protocol data acquisition Small-sized C PCI board card Download PDFInfo
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- CN108647175A CN108647175A CN201810384139.9A CN201810384139A CN108647175A CN 108647175 A CN108647175 A CN 108647175A CN 201810384139 A CN201810384139 A CN 201810384139A CN 108647175 A CN108647175 A CN 108647175A
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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
Abstract
A kind of multi-protocol data acquisition Small-sized C PCI board card, including data processing module, bus switching module, CPCI interface modules, functional interface module, bi-directional drive module and difference block.The CPCI boards can realize EnDat agreements and SMBus protocol communication functions, according to EnDat agreements and SMBus agreements, it is connect respectively with the encoder sensor of Heidenhain company and Melexis companies infrared temperature induction chip, again by the acquisition of signal and processing, achieve the purpose that sensor information acquires in real time.On the other hand, in order to reduce space, cost is saved, using Miniaturization Design scheme.
Description
Technical field
The present invention relates to a kind of multi-protocol data acquisition Small-sized C PCI board cards, belong to flight control system emulation technology neck
Domain.
Background technology
EnDat agreements are digital, full duplex synchronous serial the data transmissions that Heidenhain company aims at encoder design
Agreement has many advantages, such as that transmission speed is fast, powerful, line is simple, strong antijamming capability, is encoder, grating scale data
The general-purpose interface of transmission.Encoder carves the physics on code-disc using natural binary, cycle binary system (Gray code) or PRC codes
Line carries out opto-electronic conversion, and the angle of rotation measurement of connecting shaft is converted into corresponding electrical pulse sequence and with digital output.Coding
Utensil has the advantages that small, precision is high, interface digitizes and absolute fix, is widely used in turntable, robot, numerical control machine
The numerous areas such as bed and high accuracy servo system.
SMBus agreements are the standard bus protocols between intelligent component, are developed on I2C bus foundations, are
A kind of bus with I2C bus highly compatibles.SMBus bus specifications define SMBus bus signals, electrical code, transmission lattice
Formula, verification mode, bus operation, address such as split at the contents.Constantly improve with specification and update, SMBus agreements are in intelligence
Instrument and industrial measurement and control field have obtained more and more applications.
Cpci bus has high opening, high reliability, hot-swappable property, is suitable for real time system control, real time data
The modularizations such as acquisition, military system and high-reliability, the application field that can be used for a long time.And CPCI is electrically advised based on PCI
The High performance industrial bus of model exploitation, the PCI of operating system, driving and application program and desktop used in cpci bus system
Bus system is compatible with, therefore builds the Measurement ＆control computer of cpci bus platform, meets each performance requirement, and with firmer, more
Reliably, many advantages, such as modularization, easy use, easy care.
The data collecting systems such as original servo mechanism pivot angle, position are using analog output sensor, gatherer process
Interference is big, directly affects servo pivot angle, position measurements so that servo mechanism frequency characteristic measurement value difference influences control system
Performance evaluation.Currently, lacking the real-time acquisition mode of temperature, measuring environment temperature and device temperature can not be acquired in real time, and emulation is real
It is not high to test the degree of automation.
Invention content
The technology of the present invention solves the problems, such as：It is small a kind of multi-protocol data acquisition has been overcome the deficiencies of the prior art and provide
Type CPCI boards, by realizing EnDat and SMBus protocol communication functions based on cpci bus interface, come automation collection and
Handle sensor information.
Technical solution of the invention is：
A kind of multi-protocol data acquisition Small-sized C PCI board card, including：Data processing module, bus switching module, CPCI connect
Mouth mold block, functional interface module, bi-directional drive module and difference block；
The triggering command that host computer is sent passes to data processing module by bus switching module, and data processing module connects
It after receiving triggering command, generates data acquisition instructions and is sent to bi-directional drive module, bi-directional drive module refers to data acquisition
It enables after carrying out drive amplification, differential signal is converted to by difference block, then export by functional interface module and acquired to data
The external difference signal of sensor, data sampling sensor acquisition is sent into difference block, difference block by functional interface module
It is sent into bi-directional drive module after the external difference signal of input is converted to common-mode signal, bi-directional drive module believes the common mode
It is supplied to data processing module after number carrying out level conversion, after data processing module will carry out level conversion according to corresponding agreement
Signal handled, handling result matches cpci bus and final output by bus switching module, to realize multi-protocols
Data acquire.
The data sampling sensor includes temperature sensor, linear position sensors and rotational position sensor.
When data processing module carries out data acquisition and processing (DAP) for linear position sensors or rotational position sensor, adopt
With EnDat agreements.
When data processing module carries out data acquisition and processing (DAP) for temperature sensor, using SMBus agreements.
Linear position sensors are grating scale, and rotational position sensor is photoelectric code disk, and temperature sensor is infrared temperature
Collector.
When the data of acquisition are linear position sensors or rotational position sensor exports, data processing module uses
EnDat agreements are acquired and handle, and steps are as follows：
(6.1) after data processing module receives triggering command, square-like clock signal CLOCK is generated, the signal is corresponding
Counter COUNT is initialized as 0；
(6.2) add 1 certainly in each rising edge clock counter COUNT of CLOCK；
(6.3) when it is 3 to detect the value of COUNT, linear position sensors or rotational position sensor have been illustrated
Positional value preservation is finished, 8 bit patterns is sent and instructs to linear position sensors or rotational position sensor；
(6.4) when it is 11 to detect the value of COUNT, start to detect linear position sensors or rotational position sensor pair
The rising edge for the data-signal answered illustrates to receive data start bit, later in the rising of each CLOCK signal when rising edge arrives
Level value is preserved successively along from low level to a high position, when detecting that the value of COUNT is 34, stops receiving data, by storage
All level values are converted to positional value and export.
When the data of acquisition are that temperature sensor exports, data processing module is acquired and is located using SMBus agreements
Reason, steps are as follows：
(7.1) it after data processing module receives triggering command, is first write on the data bus from address to temperature sensor
00H；
(7.2) temperature sensor write order 07H is given on the data bus；
(7.3) temperature sensor write-read order, temperature sensor to start to transmit temperature data on the data bus；
(7.4) data processing module reads temperature data low byte；
(7.5) data processing module reads temperature data high byte；
(7.6) data processing module reads temperature data error message code；
(7.7) temperature data low byte and high byte are spliced, form temperature value and exported.
The period of square-like clock signal CLOCK is 0.5 microsecond.
A kind of flight control system Semi-Physical Simulation Test System, the pilot system include flight control computer, servo
Structure, data collecting system and simulation computer, environmental parameter when simulation computer is for by aircraft live flying are uploaded to
Flight control computer, flight control computer work according to the environment parameter control servo-drive system, and data collecting system acquires servo
The execution state of structure, environment temperature, device temperature, are uploaded to simulation computer, in kind to complete flight control system half
L-G simulation test；The data collecting system uses the multi-protocol data acquisition CPCI boards such as to realize.
Compared with the prior art, the invention has the advantages that：
(1) by realizing the 3U size interfaces of EnDat agreements and SMBus protocol communication functions based on cpci bus interface
Board has high open, high reliability.Many advantages, such as with firmer, more reliable, modularization, easily use, easy care.
It is suitable for real time system control, real-time data acquisition system, and applies in control system Semi-Physical Simulation Test System.Board
Miniaturization Design saves space, reduces cost.Function Extension, sensor (code-disc or the temperature sensing of connector interface
Device) connection number extend to 8.
(2) present invention uses compact interface (CPCI) framework, can facilitate and is connected with each other with Measurement ＆control computer, anti-interference
Ability is strong, meets photoelectric code disk and infrared temperature induction chip data acquisition request.Miniaturization Design scheme, reduces sky
Between, cost is saved, is had important practical significance and application potential.
(3) due to using digital transducer and corresponding data processing in the present invention, with interfering, small, precision is high
The characteristics of.
Description of the drawings
Fig. 1 is the outline plate frame size figure of the present invention.
Fig. 2 is multi-protocol data acquisition Small-sized C PCI board card system principle diagram of the present invention.
Fig. 3 is board EnDat protocols FPGA program flow diagrams of the present invention.
Fig. 4 is board SMBus protocols FPGA program flow diagrams of the present invention.
Specific implementation mode
Specific implementation mode is further illustrated the present invention below in conjunction with the accompanying drawings.
Cpci bus be by pci bus and Europe rule card mechanical structure be combined development made of, it is electrical with pci bus
Specification is mutually compatible with, and is combined with the mechanical structure of Europe rule card, high performance connectors, has good, high availability of anti-seismic performance etc.
Advantage is very suitable for industry spot application.
Patent of the present invention has been designed to provide a kind of multi-protocol data acquisition Small-sized C PCI board card.On the one hand, should
CPCI boards can realize EnDat agreements and SMBus protocol communication functions, according to EnDat agreements and SMBus agreements, respectively with sea
The encoder sensor of Derham Trading Ltd. is connected with Melexis companies infrared temperature induction chips, then the acquisition for passing through signal
And processing, achieve the purpose that sensor information acquires in real time.On the other hand, in order to reduce space, cost is saved, using miniaturization
Design scheme.
As shown in Fig. 2, Small-sized C PCI board card proposed by the present invention includes data processing module (FPGA), bus switching module
(9030 bridge piece), CPCI interface modules (J1), functional interface module (J2), bi-directional drive module and difference block；
The triggering command that host computer is sent passes to data processing module by bus switching module, and data processing module connects
It after receiving triggering command, generates data acquisition instructions and is sent to bi-directional drive module, bi-directional drive module refers to data acquisition
It enables after carrying out drive amplification, differential signal is converted to by difference block, then export by functional interface module and acquired to data
The external difference signal of sensor, data sampling sensor acquisition is sent into difference block, difference block by functional interface module
It is sent into bi-directional drive module after the external difference signal of input is converted to common-mode signal, bi-directional drive module believes the common mode
It is supplied to data processing module after number carrying out level conversion, after data processing module will carry out level conversion according to corresponding agreement
Signal handled, handling result matches cpci bus and final output by bus switching module, to realize multi-protocols
Data acquire.
Servo mechanism pivot angle information in CPCI boards of the present invention acquisition in real time and processing control system Hardware-in-loop Simulation Experimentation
And temperature information.The interface board is designed to card insert type signal-processing board, has the PCI performances of 33MHz, supports 32 data
Transmission, the interface board card based on cpci bus interface by realizing EnDat and SMBus protocol communication functions, to acquire and locate
Manage sensor information.The interface board use 3U boards size (160mm*100mm), it is light it is small and exquisite, reduce space, save at
This.
Control logic of the present invention programs realization in FPGA.The CPCI protocol interface chips that Hardware Design uses
PCI9030, fpga chip EP3C40Q240C8N.Specific design is as follows：
Present invention design uses card insert type signal-processing board, signal-processing board to be connected with host by pci bus, board
Mechanical dimension is standard, is designed to 3U (160mm*100mm) standard-sized general signal processing module, realize application program and
Control instruction is transferred to from collecting computer on FPGA, then by being in communication with each other between collecting computer by cpci bus
FPGA collection results are transmitted to collecting computer by cpci bus.
The main feature that the present invention designs CPCI interfaces is as follows：Have the PCI performances of 33MHz, 32 data is supported to pass
Defeated, each total segment supports 8 CPCI slots, bus to be managed by system at 33MHz.
Cpci bus Interface design of the present invention is based on CPCI specifications, using the Typical design methods based on bridge piece：Bridge piece+
Local function peripheral hardware.The bus timing of PCI complexity is translated into relatively simple local bus by bridge piece special disposal bus interface
Sequential, local function circuit realize EnDat buses and SMBus buses using the local bus of bridge piece, respectively with cpci bus phase
The purpose of mutual communication.Signal on connector J1 realizes pci bus.Cpci bus interface circuit is divided into main equipment and from equipment.
Main equipment can drive address, data and control signal with controlling bus：It cannot start bus operation from equipment, rely only on
Main control device transmits data from wherein reading data or to it.
The present invention is using bridge piece as design basis.The signal of PLX bridge pieces is divided into three parts：Pci bus signal, E2PROM interfaces
Signal and local bus signal.Pci bus signal is directly interconnected with the bus signals on J1, need not do any specially treated.
E2PROM interfaces meet SPI interface specification.Local bus signal is for the interface with local function equipment (I/O controller), sequential
Simply, easily operated realization.
The bridge piece of PLX needs the initial configuration parameter of E2PROM storage bridge pieces.Configuration information includes mainly：
(1) configuration of PCI configuration registers, configuration content include：Manufacturer's ID number, device ID number, class decoding subsystem 1D
Number and subsystem manufacturer's ID number.
(2) be locally configured the configuration of register, configuration content be mainly home address space attribute and local address it is total
The attribute of line.
The design of EnDat and SMBus communication function card of the patent of the present invention based on CPCI is to choose general cpci bus
Communication controler chip realizes host by cpci bus to EnDat buses by programming the logic control circuit inside FPGA
With the control and access of SMBus buses, CPCI interfaces realize the interface connection of cpci bus using general PCI9030 chips.
Local function circuit part realizes the sensor of connector interface by the multiplexing of clock signal and the expansion of data-signal
(code-disc or temperature sensor) connection number extends to 8.
It is as follows that the present invention provides embodiment：
The present invention applies in flight control system Semi-Physical Simulation Test System, and servo mechanism pivot angle acquisition system is adopted
With Heidenhain company encoder sensor, temperature acquisition system uses Melexis companies infrared temperature induction chip.
Fig. 1 is 3U board outline dimensional drawings.Build bus interface processing circuit+EnDat and SMBus common functions circuits
Overall architecture.The research and development of whole system are based on cpci bus, and module PCI Bridge realizes that the data of collecting computer and FPGA are handed over
Mutually；FPGA is responsible for the realization of EnDat agreements and SMBus agreements, the storage of data.The encapsulating structure of CPCI plates is based on IEC
The European board shape that 60297-3, IEC 60297-4 and IEEE 1101.10 are defined.Define 3U sizes (160mm*
100mm)。
Fig. 2 is the miniaturization data collecting plate card system principle diagram based on EnDat Yu SMBus agreements, proposes a kind of base
In the hardware design implementation method of the EnDat and SMBus communication function modules of cpci bus, wherein control logic is compiled in FPGA
Cheng Shixian.The CPCI protocol interface chip PCI9030 and programmable logic device that Hardware Design implementation method uses
EP3C40Q240C8N.Give the hardware block diagram that PCI9030 and EP3C40Q240C8N chips realize interface.
Slave target devices of the PCI9030 as host, simultaneously for being main equipment for local bus.Local bus is
A data access is provided between pci bus and FPGA.And main equipments of the PCI9030 as local bus, can be intelligently
Complete the data transmission between local bus and internal register, inside FIFO.5 address spaces that PCI9030 is provided can lead to
It crosses and relative configuration register is set to determine the feature of local bus.After electrification reset, the reset signal of PCI will
The internal register of PCI9030 resets, and pci bus and local bus are also at reset or high-impedance state, and PCI9030 detections are serial
E2PROM, and its content is loaded into PCI9030.The internal register of PCI9030 includes mainly PCI configuration registers, office
Portion's configuration register, power management registers, hot plug register, VPD registers.Serial E2PROM selects NM93CS66L cores
Piece is configured.
FPGA (EP3C40Q240C8N) mainly completes the communication between PCI9030, and realizes that EnDat and SMBus is assisted
Communication module is discussed, real-time acquisition, storage and the upload of sensor information are responsible for.Bi-directional drive SN74ALVC164245DL is realized
Level conversion between 3.3V and 5V ensures the compatibility of communication signal.Difference chip SN75176BP realizes communication signal
Differential signal inputs the conversion with output.Interface J1 (J29A-37ZKWP4) together provides 6 road differential clocks and 8 tunnel difference numbers
According to this and 5V power supplys and earth signal can connect 1 wherein 2 road differential clock signals multiplexings provide 4 road differential clock signals per road
Encoder sensor or 1 infrared temperature induction chip are communicated.It can at most be passed simultaneously with 8 photoelectric code disks in this way
Sensor or 8 infrared temperature induction chips are communicated, also can any amount collocation.
Fig. 3 is board EnDat protocols FPGA program flow diagrams of the present invention.The exploitation of FPGA is retouched using VHDL hardware
Predicate is sayed.Local function module, EnDat protocol modules are broadly divided into inside FPGA.Local function module be responsible for FPGA with
Communication between PCI9030, is made of decoding circuit.EnDat protocol modules are responsible for acquisition and storage sensor information in real time.
EnDat protocol modules are divided into the parts such as Clock generation module, counter module, sending module, receiving module memory module.It is first
First, the square-wave signal that the period is 0.5 microsecond is generated by Clock generation module, is named as CLOCK, when this signal is synchronous as communication
Clock signal.In each rising edge clock counter COUNT of CLOCK from adding 1, the initial value of variable COUNT is 0.When detecting
When the value of COUNT is 3, illustrate that encoder finishes positional value preservation, sending module starts to send the instruction of 8 bit patterns.When
When detecting that the value of COUNT is 11, receiving module starts the rising edge of detection data input signal, the explanation once rising edge arrives
Data start bit S is received, later in the rising edge save location value of each clock signal, until detecting that the value of COUNT is 34
When, stop receiving data, the positional value to be preserved is written from receiving module to memory module, to terminate a FPGA and coding
The communication process of device waits for PCI9030 to read data, is uploaded to collecting computer.Finally, counter COUNT is reset, and is opened again
The communication of beginning a FPGA and encoder.
Fig. 4 is board SMBus protocols FPGA program flow diagrams of the present invention.
Program circuit is as follows：
(a) it after data processing module receives triggering command, is first write on the data bus from address to temperature sensor
00H；
(b) temperature sensor write order 07H is given on the data bus；
(c) temperature sensor write-read order, temperature sensor to start to transmit temperature data on the data bus；
(d) data processing module reads temperature data low byte；
(e) data processing module reads temperature data high byte；
(f) data processing module reads temperature data error message code；
(g) temperature data low byte and high byte are spliced, form temperature value and exports
A byte has been sent every time, has been judged as whether other side has response, if there is response just then sends next word
Section；The byte is repeatedly retransmitted if do not replied, until there is response, just then sends next byte, if after repeatedly retransmitting,
Still terminate without response.When receiving data, receiving a byte every time, (step-by-step receives, and it is exactly a word to receive 8 positions
Section), after sending an answer signal to other side, so that it may to continue to next byte.
The content that description in the present invention is not described in detail belongs to the known technology of those skilled in the art.
Claims (9)
1. a kind of multi-protocol data acquisition Small-sized C PCI board card, it is characterised in that including：Data processing module, bus switching mould
Block, CPCI interface modules, functional interface module, bi-directional drive module and difference block；
The triggering command that host computer is sent passes to data processing module by bus switching module, and data processing module receives
After triggering command, generate data acquisition instructions and be simultaneously sent to bi-directional drive module, bi-directional drive module by data acquisition instructions into
After row drive amplification, differential signal is converted to by difference block, then export to acquire to data by functional interface module and sense
The external difference signal of device, data sampling sensor acquisition is sent into difference block by functional interface module, and difference block will be defeated
The external difference signal entered is converted to and is sent into bi-directional drive module after common-mode signal, bi-directional drive module by the common-mode signal into
It is supplied to data processing module after line level conversion, data processing module is according to corresponding agreement by the letter after carrying out level conversion
It number is handled, handling result matches cpci bus and final output by bus switching module, to realize multi-protocol data
Acquisition.
2. a kind of multi-protocol data acquisition Small-sized C PCI board card according to claim 1, it is characterised in that：The data are adopted
It includes temperature sensor, linear position sensors and rotational position sensor to collect sensor.
3. a kind of multi-protocol data acquisition Small-sized C PCI board card according to claim 2, it is characterised in that：Data processing mould
When block carries out data acquisition and processing (DAP) for linear position sensors or rotational position sensor, using EnDat agreements.
4. a kind of multi-protocol data acquisition Small-sized C PCI board card according to claim 2, it is characterised in that：Data processing mould
When block carries out data acquisition and processing (DAP) for temperature sensor, using SMBus agreements.
5. a kind of multi-protocol data acquisition Small-sized C PCI board card according to any one of claim 2, it is characterised in that：Directly
Line position sensor is grating scale, and rotational position sensor is photoelectric code disk, and temperature sensor is infrared temperature collector.
6. a kind of multi-protocol data acquisition Small-sized C PCI board card according to claim 3, it is characterised in that：When the number of acquisition
According to for linear position sensors or rotational position sensor output when, data processing module is acquired using EnDat agreements
And processing, steps are as follows：
(6.1) after data processing module receives triggering command, square-like clock signal CLOCK, the corresponding counting of the signal are generated
Device COUNT is initialized as 0；
(6.2) add 1 certainly in each rising edge clock counter COUNT of CLOCK；
(6.3) when it is 3 to detect the value of COUNT, illustrate linear position sensors or rotational position sensor by position
It sets value preservation to finish, sends 8 bit patterns and instruct to linear position sensors or rotational position sensor；
(6.4) when it is 11 to detect the value of COUNT, start to detect linear position sensors or rotational position sensor is corresponding
The rising edge of data-signal, when rising edge arrive explanation receive data start bit, later the rising edge of each CLOCK signal from
Low level preserves level value successively to a high position, when detecting that the value of COUNT is 34, stops receiving data, by all of storage
Level value is converted to positional value and exports.
7. a kind of multi-protocol data acquisition Small-sized C PCI board card according to claim 4, it is characterised in that：When the number of acquisition
When according to being exported for temperature sensor, data processing module is acquired and is handled using SMBus agreements, and steps are as follows：
(7.1) it after data processing module receives triggering command, is first write on the data bus from address 00H to temperature sensor；
(7.2) temperature sensor write order 07H is given on the data bus；
(7.3) temperature sensor write-read order, temperature sensor to start to transmit temperature data on the data bus；
(7.4) data processing module reads temperature data low byte；
(7.5) data processing module reads temperature data high byte；
(7.6) data processing module reads temperature data error message code；
(7.7) temperature data low byte and high byte are spliced, form temperature value and exported.
8. a kind of multi-protocol data acquisition Small-sized C PCI board card according to claim 6, it is characterised in that：Square wave clock is believed
The period of number CLOCK is 0.5 microsecond.
9. a kind of flight control system Semi-Physical Simulation Test System, it is characterised in that：The pilot system includes flying control to calculate
Machine, servo mechanism, data collecting system and simulation computer, environment ginseng when simulation computer is for by aircraft live flying
Number is uploaded to flight control computer, and flight control computer works according to the environment parameter control servo-drive system, and data collecting system is adopted
The execution state, environment temperature, device temperature for collecting servo mechanism, are uploaded to simulation computer, to complete flying vehicles control system
System Hardware-in-loop Simulation Experimentation；The data collecting system uses the multi-protocol data acquisition as described in any one of claim 1~8
CPCI boards are realized.
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| CN112162509A (en) * | 2020-09-25 | 2021-01-01 | 中国直升机设计研究所 | Active control rotor real-time control system based on FPGA + CPU architecture |
| CN113190291A (en) * | 2021-05-25 | 2021-07-30 | 电子科技大学 | Configurable protocol conversion system and method based on network-on-chip data acquisition |
| CN114490494A (en) * | 2021-12-29 | 2022-05-13 | 北京航天自动控制研究所 | Multi-bus real-time interaction system and interaction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112162509A (en) * | 2020-09-25 | 2021-01-01 | 中国直升机设计研究所 | Active control rotor real-time control system based on FPGA + CPU architecture |
| CN112162509B (en) * | 2020-09-25 | 2024-01-02 | 中国直升机设计研究所 | Active control rotor real-time control system based on FPGA+CPU architecture |
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| CN114490494A (en) * | 2021-12-29 | 2022-05-13 | 北京航天自动控制研究所 | Multi-bus real-time interaction system and interaction method |
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Application publication date: 20181012 |