CN113849444B - PCI bus system for industrial control system - Google Patents
PCI bus system for industrial control system Download PDFInfo
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- CN113849444B CN113849444B CN202111174340.2A CN202111174340A CN113849444B CN 113849444 B CN113849444 B CN 113849444B CN 202111174340 A CN202111174340 A CN 202111174340A CN 113849444 B CN113849444 B CN 113849444B
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- 238000003780 insertion Methods 0.000 abstract description 3
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- 238000010586 diagram Methods 0.000 description 11
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
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- 229910052737 gold Inorganic materials 0.000 description 2
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- 238000004891 communication Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4204—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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- 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
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4027—Coupling between buses using bus bridges
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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
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/76—Architectures of general purpose stored program computers
- G06F15/78—Architectures of general purpose stored program computers comprising a single central processing unit
- G06F15/7807—System on chip, i.e. computer system on a single chip; System in package, i.e. computer system on one or more chips in a single package
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/76—Architectures of general purpose stored program computers
- G06F15/78—Architectures of general purpose stored program computers comprising a single central processing unit
- G06F15/7867—Architectures of general purpose stored program computers comprising a single central processing unit with reconfigurable architecture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- General Engineering & Computer Science (AREA)
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- Computing Systems (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Bus Control (AREA)
Abstract
The invention discloses a PCI bus system for an industrial control system; the PCI bus of the computer is converted into a local bus of the control system through a PCI bridge connection chip; the IF board is used for realizing the relay of local bus signals, processing the relayed signals to the FPGA and correspondingly controlling the data bus, the address bus and the control bus; the BB board is used for realizing an interface of an external power supply and realizing electrical connection with the external power supply; and redistributing the signals transmitted by the IF board; the BB board is used as an expansion slot, and 16 slots are formed on the BB board, and 16 different industrial control board cards are respectively inserted into the BB board; the PCI bus control distance can reach more than 3 meters, and the control instruction speed can reach 30us; the expansion is supported, the expansion can be extended to 16 slots, and the board card supports mixed insertion.
Description
Technical Field
The invention belongs to the technical field of PCI buses, and particularly relates to a PCI bus system for an industrial control system.
Background
Industrial control refers to industrial automation control, and is mainly realized by using the combination of electronics, mechanics and software. I.e. industrial control or factory automation control. The PCI bus is a tree structure and independent of CPU bus, and can operate in parallel with the CPU bus. The PCI bus can be connected with PCI devices and PCI bridge pieces in a hanging mode, only one PCI master device is allowed on the PCI bus, other PCI slave devices are allowed on the PCI bus, read-write operation can be carried out between the master device and the slave device, data exchange between the slave devices needs to be transferred through the master device, and various PCI bus systems on the market still have various problems.
The PCI adapter for image processor disclosed in CN101086727A can make user change local control interface according to self-designed requirement to meet design requirement without changing hardware, and its computer end has WDM driver and dynamic link library to make user writing interface control the hardware of image processor with PCI adapter from computer end without knowing its working principle. The adapter hardware is only required to use a large-scale programmable device; although it is realized that one end of the programmable device is connected to the PCI bus and one end is connected to other modules of the image processor. A NiosII soft core is implanted in the large-scale programmable device, and a control module of a PCI bus and the like are added as peripheral equipment of the soft core. The programmability of the PCI bus system improves the tailorability of the system, reduces the development cost of the system, ensures that the adapter has great adaptability and extremely high cost performance, but does not solve the problems that the existing PCI bus cannot be transmitted remotely, and can ensure that the control distance is more than 3 meters.
Disclosure of Invention
The present invention is directed to a PCI bus system for an industrial control system, so as to solve the above-mentioned problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a PCI bus system for industrial control system is composed of a control system consisting of three control boards consisting of PCI board, IF board and BB board,
the PCI board is arranged in a PCI slot of the upper computer, and the PCI bus of the computer is further converted into a local bus of the control system through the PCI bridging chip;
the IF board internally comprises a signal relay and an FPGA, and is used for realizing the relay of local bus signals and processing the relayed signals to the FPGA so as to correspondingly control a data bus, an address bus and a control bus;
the BB board is used for realizing an interface of an external power supply and realizing electrical connection with the external power supply; and redistributing the signals transmitted by the IF board; the BB board is used as an expansion slot, and 16 slots are formed on the BB board, and 16 different industrial control board cards are respectively inserted for corresponding control and application;
the IF board is electrically connected with the BB board through a data line, an address line, read-write control and Slot chip selection.
Preferably, the BB board performs power supply operation through the power cabinet; the upper computer is internally provided with the PCI board, and the PCI board is connected with the IF board through a PCI bus; the IF board is plugged on the BB board, and then the local bus is redistributed to the BB board, there are 16 slots on the BB board, where one slot board is externally connected with the system through the PCI bus, or performs data interaction with the host computer through other interfaces; the upper computer is inserted with a GPIB control board card for controlling other peripheral devices, and the GPIB control board card is electrically connected with the probe station.
Preferably, the PCI board is input by PCI golden finger part, and the PCI golden finger adopts 5V level; the output of the PCI board is a SCSI interface of 50pin, and the SCSI interface comprises 16 data buses LAD0-LAD15, 23 address buses LA1-LA23 and 4 control buses which are respectively a T_RD read signal, a T_WR write signal, a T_HWR read-write direction control line and a T_INT interrupt signal.
Preferably, the PCI bridge chip is a PCI9052 chip, and the PCI9052 chip is connected to the EEPROM through a pin EECS, EEDO, EESK and an EEDI, so as to implement configuration of the PCI9052 chip; meanwhile, the 32-bit PCI buses AD0-AD31 of the computer are converted into local buses, namely 16 data buses LAD0-LAD15, 23 address buses LA1-LA23 and 4 control buses, which are respectively a T_RD read signal, a T_WR write signal, a T_HWR read-write direction control line and a T_INT interrupt signal.
Preferably, the local bus of the output of the PCI9052 chip is used for realizing data, address and control, and the PCI9052 chip relays through the 74HCT245 chip, thereby enhancing long-distance transmission of the local data bus.
Preferably, the IF board is connected to the output of the PCI board by using a SCSI50pin connector, and the signal is enhanced by using a 74HCT245 chip for long-distance transmission of the signal; T_LAD, T_LA, T_WR and T_RD local buses led out by the PCI board become LAD, LA, WR and RD control buses; the 74LVC4254A chip also converts the 5V level into the 3.3V level, so that the FPGA enters the FPGA and is further processed by the FPGA; after 5 address lines of LA19, LA20, LA21, LA22 and LA23 enter the FPGA, the FPGA codes the address lines into 32 chip selection signals.
Preferably, the FPGA chip on the IF board is a 10CL016YF484I7 chip, and the 10CL016YF484I7 chip is used for implementing unified processing on address lines, data lines and control lines.
Preferably, the IF board transfers the data lines LAD0-LAD15, the address lines LA1-LA18, the chip select signals slot0-slot15, and the read/write control lines to the BB board of the control board.
Preferably, the power interface part of the BB board is mainly used for switching an external power supply to the 16-slot board, and the external power supply comprises +/-54V or +/-48V.
Preferably, the interface of the BB board provides different power supplies, PCI data buses, address lines, control lines and slot chip selection signals of slots, the back board of the BB board has 16 similar slot interfaces for different boards to be inserted, the upper computer selects one of the boards of the slots through the chip selection signals and the address lines and the data lines, the information of the corresponding board is read through the address lines, the board information is returned to the upper computer through the data lines, and the upper computer acquires what kind of board the control board on the slot is.
Compared with the prior art, the invention has the beneficial effects that:
the PCI bridge chip is used in the present invention to convert the PCI bus of computer into local bus, which is data line, address line and control line (including read, write, read-write direction control and chip selecting signal) and the local bus is then relayed to FPGA. The buses such as address, data and the like are controlled through the FPGA. The system can be extended to 16 slots, each slot can be plugged with a control board card, and there is no requirement for the sequence of board card insertion. Each board card has a chip selection signal, and the computer can complete the inquiry function of all the board cards through the FPGA. Due to the adoption of the relay means, the distance of PCI control can be more than 3 meters.
Drawings
FIG. 1 is a schematic diagram of a system architecture of the present invention;
FIG. 2 is a schematic diagram of an application of the present invention based on the system;
FIG. 3 is a schematic diagram of an I/O interface of a PCI board according to the present invention;
FIG. 4 is a schematic diagram of a PCI board bridge chip according to the present invention;
FIG. 5 is a schematic diagram of a local bus of the PCI9052 chip output of the present invention;
FIG. 6 is an interface diagram of an IF board of the present invention;
FIG. 7 is a schematic diagram of a level shifting portion of an IF board of the present invention;
FIG. 8 is a schematic diagram of an FPGA chip of the IF board of the present invention;
FIG. 9 is a schematic diagram of interfaces of the IF and BB boards of the present invention;
FIG. 10 is a schematic diagram of a power interface portion of a BB board of the present invention;
fig. 11 is a schematic diagram of an interface of a certain slot above the BB board of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 11, the present invention provides a technical solution: a PCI bus system for industrial control system is composed of a control system consisting of three control boards consisting of PCI board, IF board and BB board,
the PCI board is arranged in a PCI slot of the upper computer, and the PCI bus of the computer is further converted into a local bus of the control system through the PCI bridging chip;
the IF board internally comprises a signal relay and an FPGA, and is used for realizing the relay of local bus signals and processing the relayed signals to the FPGA so as to correspondingly control a data bus, an address bus and a control bus;
the BB board is used for realizing an interface of an external power supply and realizing electrical connection with the external power supply; and redistributing the signals transmitted by the IF board; the BB board is used as an expansion slot, and 16 slots are formed on the BB board, and 16 different industrial control board cards are respectively inserted for corresponding control and application;
the IF board is electrically connected with the BB board through a data line, an address line, read-write control and Slot chip selection.
In order to realize power supply operation and external communication, in this embodiment, preferably, the BB board performs power supply operation through a power cabinet; the upper computer is internally provided with the PCI board, and the PCI board is connected with the IF board through a PCI bus; the IF board is plugged on the BB board, and then the local bus is redistributed to the BB board, there are 16 slots on the BB board, where one slot board is externally connected with the system through the PCI bus, or performs data interaction with the host computer through other interfaces; the upper computer is inserted with a GPIB control board card for controlling other peripheral devices, and the GPIB control board card is electrically connected with the probe station.
In order to output data, in this embodiment, preferably, the PCI board uses a PCI gold finger portion for inputting, and the PCI gold finger uses a 5V level; the output of the PCI board is a SCSI interface of 50pin, and the SCSI interface comprises 16 data buses LAD0-LAD15, 23 address buses LA1-LA23 and 4 control buses which are respectively a T_RD read signal, a T_WR write signal, a T_HWR read-write direction control line and a T_INT interrupt signal.
In order to convert the PCI bus into a local bus of the control system, in this embodiment, preferably, the PCI bridge chip is a PCI9052 chip, and the PCI9052 chip is connected to the EEPROM through a pin EECS, EEDO, EESK and an EEDI, so as to implement configuration of the PCI9052 chip; meanwhile, the 32-bit PCI buses AD0-AD31 of the computer are converted into local buses, namely 16 data buses LAD0-LAD15, 23 address buses LA1-LA23 and 4 control buses, which are respectively a T_RD read signal, a T_WR write signal, a T_HWR read-write direction control line and a T_INT interrupt signal.
In order to realize output of data, address and control and enable long-distance transmission, in this embodiment, preferably, the local bus of the output of the PCI9052 chip is used to realize data, address and control, and the PCI9052 chip relays through the 74HCT245 chip, so as to enhance long-distance transmission of the local data bus.
In order to enhance the signal output in a long distance, in this embodiment, preferably, the IF board interfaces with the output of the PCI board using a SCSI50pin connector, and uses a 74HCT245 chip to enhance the signal in order to enable the signal to be transmitted in a long distance; T_LAD, T_LA, T_WR and T_RD local buses led out by the PCI board become LAD, LA, WR and RD control buses; the 74LVC4254A chip also converts the 5V level into the 3.3V level, so that the FPGA enters the FPGA and is further processed by the FPGA; after 5 address lines of LA19, LA20, LA21, LA22 and LA23 enter the FPGA, the FPGA codes the address lines into 32 chip selection signals.
In order to implement unified processing on the address line, the data line and the control line, in this embodiment, preferably, the FPGA chip on the IF board is a 10CL016YF484I7 chip, and the 10CL016YF484I7 chip is used to implement unified processing on the address line, the data line and the control line.
In order to implement efficient control and read/write processes, in this embodiment, preferably, the IF board transfers the data lines LAD0-LAD15, the address lines LA1-LA18, and the chip select signals slot0-slot15, and the read/write control lines to the BB board of the control board.
In order to implement an effective power supply process, in this embodiment, preferably, the power interface portion of the BB board is mainly used to switch an external power source to the 16 slot board, where the external power source includes ±54V or ±48V.
In order to provide different power supplies, PCI data buses, address lines and control line interfaces, in this embodiment, preferably, the interface of the BB board provides different power supplies, PCI data buses, address lines and control lines, and slot chip selection signals, there are 16 similar slot interfaces on the back board of the BB board for different board cards to insert, and because of the chip selection signals, the address lines and the data lines, the host computer selects one of the board cards in the slot through the chip selection signals, reads information of a corresponding board card through the address line, and transmits the information of the board card back to the host computer through the data line, and the host computer obtains what kind of board card is on the slot.
The working principle and the using flow of the invention are as follows: when in use, the PCI bridge chip is adopted to convert the PCI bus of the computer into local buses, namely data lines, address lines and control lines (comprising read, write, read-write direction control and chip selection signals), and the local buses enter the FPGA through signal relay. The buses such as address, data and the like are controlled through the FPGA. The system can be extended to 16 slots, each slot can be plugged with a control board card, and there is no requirement for the sequence of board card insertion. Each board card has a chip selection signal, and the computer can complete the inquiry function of all the board cards through the FPGA. Due to the adoption of the relay means, the distance of PCI control can be more than 3 meters.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The PCI bus system for industrial control system includes one control system comprising three control boards, including PCI board, IF board and BB board, and features that:
the PCI board is arranged in a PCI slot of the upper computer, and the PCI bus of the computer is further converted into a local bus of the control system through the PCI bridging chip;
the IF board internally comprises a signal relay and an FPGA, and is used for realizing the relay of local bus signals and processing the relayed signals to the FPGA so as to correspondingly control a data bus, an address bus and a control bus;
the BB board is used for realizing an interface of an external power supply and realizing electrical connection with the external power supply; and redistributing the signals transmitted by the IF board; the BB board is used as an expansion slot, and 16 slots are formed on the BB board, and 16 different industrial control board cards are respectively inserted for corresponding control and application;
the IF board is electrically connected with the BB board through a data line, an address line, read-write control and Slot chip selection.
2. A PCI bus system for an industrial control system as defined in claim 1, wherein: the BB board performs power supply operation through the power cabinet; the upper computer is internally provided with the PCI board, and the PCI board is connected with the IF board through a PCI bus; the IF board is plugged on the BB board, and then the local bus is redistributed to the BB board, there are 16 slots on the BB board, where one slot board is externally connected with the system through the PCI bus, or performs data interaction with the host computer through other interfaces; the upper computer is inserted with a GPIB control board card for controlling other peripheral devices, and the GPIB control board card is electrically connected with the probe station.
3. A PCI bus system for an industrial control system as defined in claim 1, wherein: the PCI board is provided with a PCI golden finger part for inputting, and the PCI golden finger adopts a 5V level; the output of the PCI board is a SCSI interface of 50pin, and the SCSI interface comprises 16 data buses LAD0-LAD15, 23 address buses LA1-LA23 and 4 control buses which are respectively a T_RD read signal, a T_WR write signal, a T_HWR read-write direction control line and a T_INT interrupt signal.
4. A PCI bus system for an industrial control system as defined in claim 1, wherein: the PCI bridge chip adopts a PCI9052 chip, and the PCI9052 chip is connected with an EEPROM through a pin EECS, EEDO, EESK and EEDI and is used for configuring the PCI9052 chip; meanwhile, the 32-bit PCI buses AD0-AD31 of the computer are converted into local buses, namely 16 data buses LAD0-LAD15, 23 address buses LA1-LA23 and 4 control buses, which are respectively a T_RD read signal, a T_WR write signal, a T_HWR read-write direction control line and a T_INT interrupt signal.
5. A PCI bus system for an industrial control system as defined in claim 4, wherein: the local bus of the output of the PCI9052 chip is used for realizing data, address and control, and the PCI9052 chip relays through the 74HCT245 chip, so that long-distance transmission of the local data bus is enhanced.
6. A PCI bus system for an industrial control system as defined in claim 1, wherein: the IF board is connected with the output of the PCI board by adopting a SCSI50pin connector, and a 74HCT245 chip is adopted to enhance the signal for the long-distance transmission of the signal; T_LAD, T_LA, T_WR and T_RD local buses led out by the PCI board become LAD, LA, WR and RD control buses; the 74LVC4254A chip also converts the 5V level into the 3.3V level, so that the FPGA enters the FPGA and is further processed by the FPGA; after 5 address lines of LA19, LA20, LA21, LA22 and LA23 enter the FPGA, the FPGA codes the address lines into 32 chip selection signals.
7. A PCI bus system for an industrial control system as defined in claim 6, wherein: the FPGA chip on the IF board adopts a 10CL016YF484I7 chip, and the 10CL016YF484I7 chip is used for realizing unified processing of an address line, a data line and a control line.
8. A PCI bus system for an industrial control system as defined in claim 1, wherein: the IF board transfers the data lines LAD0-LAD15, address lines LA1-LA18, chip select signals slot0-slot15, and read/write control lines to the BB board of the control backplane.
9. A PCI bus system for an industrial control system as defined in claim 1, wherein: the power interface part of the BB board is mainly used for switching an external power supply to the 16-slot board, and the external power supply comprises +/-54V or +/-48V.
10. A PCI bus system for an industrial control system as defined in claim 1, wherein: the BB board interface provides different power supplies, PCI data buses, address lines, control lines and slot chip selection signals of slots, 16 similar slot interfaces are arranged on the back plate of the BB board for inserting different boards, the upper computer selects one of the boards of the slots through the chip selection signals and the address lines and the data lines, the information of the corresponding board is read through the address lines, the board information is transmitted back to the upper computer through the data lines, and the upper computer acquires the type of the board on the slot.
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