CN102681967B - Data transmission device between EPA and pci bus - Google Patents
Data transmission device between EPA and pci bus Download PDFInfo
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- CN102681967B CN102681967B CN201210150986.1A CN201210150986A CN102681967B CN 102681967 B CN102681967 B CN 102681967B CN 201210150986 A CN201210150986 A CN 201210150986A CN 102681967 B CN102681967 B CN 102681967B
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Abstract
The invention provides data transmission device between a kind of EPA bus and pci bus, it comprises a pci bus control circuit module, an EPA bus control circuit module and the communication control module between them; Described communication control module comprises a data buffer, main control equipment controls described pci bus control circuit module and reads and writes data to described data buffer, described EPA bus control circuit module obtains data from described data buffer and institute's data is carried out packing process and forms EPA message bag, and described EPA message bag can transmit in EPA bus.Between EPA bus of the present invention and pci bus, data transmission device can realize interconnected communication between EPA bus and pci bus.
Description
Technical field
The present invention relates to data transmission device between a kind of bus, the data transmission device particularly between EPA and pci bus.
Background technology
PCI (PeripheralComponentInterconnect) local bus is a kind of high-performance 32/64 bit parallel bus with multichannel address wire and data line.It is at highly integrated peripheral control device, apply as interconnection mechanism between peripheral plug-in card and processor/storer.The PCI local bus specification of current application comprises PCI local bus parts, expansion board, electric, mechanical and configuration specification, and defines the hardware environment of PCI.
In August, 1997, PICMG has issued the CompactPCI technical standard of first Based PC I local bus, PICMG2.0Rev1.0, and in October, 1999 has issued PICMG2.0Rev3.0.PICMG2.0R3.0 is the core standard of CompactPCI bus, is also the marrow of CompactPCI technology.It is comprehensively formed by three leading technologies: the electrical specification of pci bus, technical grade Eurocard encapsulating structure and specification and IEC2mm high density pin hole connector.PICMG2.0R3.0 defines strict design rule and System Management Bus, and is each slot definition physical address of unique correspondence on backboard.
PC/104 is a kind of is specially embedded Control and the industrial-controlled general line that defines, and be the derivative products of pci bus in Embedded Application, nesting structural embedded control, is widely current in the world, is defined as IEEE-P996.1 by IEEE association.Relative to PCI in common computer, be defined as PCI-104 (or PC/104plus) in PC/104 embedded computer, PCI-104 is single-row three rows 120 bus pin, useful signal line and control line and pci bus completely compatible.
Meanwhile, along with the development of ethernet technology, Industrial Ethernet becomes new developing direction.EPA is as a kind of open real-time ethernet standard being applicable to industrial field device completely newly, a large amount of ripe IT technology is applied to industrial control system, utilize efficient, stable, the Ethernet of standard and the determinacy communication scheduling strategy of UDP/IP agreement, for the real-time working being applicable to field apparatus establishes a kind of brand-new standard, and set up on this basis be applied to the open network communications platform communicated between industrial field device.This project obtains the support of Chinese Government's " 863 " high-tech research and development plan.Under the support of national standardization conservator, national technical process measurement and control criterion technical committee, the standard drafting group set up by unit consolidations such as Zhejiang University, Zhejiang Zhongkong Technology Co., Ltd, Shenyang Inst of Automation, Chinese Academy of Sciences, Post and Telecommunications Institutes Of Chongqing, Tsing-Hua University, Dalian University of Technology, Shanghai Industry Automation Meter Research Institute, mechanical industry instrument and meter overall economics research institute, Beijing Huakong Technology Co., Ltd., through making great efforts the real-time commitment system scheme based on Industrial Ethernet proposed for many years.
But due to a variety of causes, making can not be compatible between pci bus and EPA bus, cannot realize sharing of information, be difficult to realize interoperability at different agreement equipment room.
Because EPA bus application prospect is again extensively the Industrial Ethernet bus that China has independent intellectual property right, but in applicable industry application at present, main flow master control equipment is many does not possess EPA interface, but pci interface is the standard configuration of PC, industrial computer.Therefore EPA bus is made can to carry out with the master control equipment with PCT interface thanking you for your congratulation and become current study hotspot.
Summary of the invention
Can not the problem of interconnection for solving in prior art data between EPA bus and pci bus, the invention provides data transmission device between a kind of EPA bus and pci bus.
Data transmission device between a kind of EPA bus and pci bus, it comprises a pci bus control circuit module, an EPA bus control circuit module and the communication control module between them; Described communication control module comprises a data buffer, main control equipment controls described pci bus control circuit module and reads and writes data to described data buffer, described EPA bus control circuit module obtains data from described data buffer and institute's data is carried out packing process and forms EPA message bag, and described EPA message bag can transmit in EPA bus.
Described communication control module also comprises a conflict arbitration circuit, and described conflict arbitration circuit is for coordinating the data processing conflict between described pci bus control circuit module and described EPA bus control circuit module.
EPA bus control circuit module of the present invention and pci bus control circuit intermodule realize being interconnected of described EPA bus and pci bus by described communication control module, thus the data achieved between EPA bus and pci bus are transmitted.
Accompanying drawing explanation
Fig. 1 is structural representation in data transmission device between EPA bus of the present invention and pci bus.
The communication control module concrete structure schematic diagram that Fig. 2 is data transmission device between the bus of EPA shown in Fig. 1 and CAN.
Embodiment
In the commercial Application of prior art, main flow master control equipment is many does not possess EPA bus interface, and pci bus interface is the standard configuration of PC, industrial computer.Therefore need to realize the compatibility of EPA bus and CAN and intercom mutually.For the compatibility that realizes EPA bus and CAN with communicate, the present invention proposes data transmission device between a kind of EPA bus and pci bus, and between described EPA bus and pci bus, data transmission device comprises a pci bus control circuit module, an EPA bus control circuit module and the communication control module between them; Described communication control module comprises a data buffer, main control equipment controls described pci bus control circuit module and reads and writes data to described data buffer, described EPA bus control circuit module obtains data from described data buffer and institute's data is carried out packing process and forms EPA message bag, and described EPA message bag can transmit in EPA bus.
Realize being interconnected of described EPA bus and pci bus by described communication control module between EPA bus of the present invention and pci bus, thus the data achieved between EPA bus and pci bus are transmitted.
Refer to Fig. 1 and Fig. 2, Fig. 1 is the structural representation of data transmission device between EPA bus of the present invention and pci bus.The communication control module 13 concrete structure schematic diagram that Fig. 2 is data transmission device 1 between the bus of EPA shown in Fig. 1 and CAN.Between described EPA bus and pci bus, data transmission device 1 comprises pci interface 14, EPA interface 15, PCT control circuit module 11, EPA control circuit module 12 and a communication control module 13.Wherein, described PCT control circuit module 11 is preferably CompactPCI or PC/104 bus control circuit module.Described communication control module 13 comprises a data buffer 131.
Main control equipment controls described pci bus control circuit module 11 by described pci interface 14 and reads and writes data to described data buffer 131, described EPA bus control circuit module 12 obtains data from described data buffer 131 and institute's data is carried out packing process and forms EPA message bag, and described EPA message bag can be outputted in EPA bus by described EPA interface 15 and transmit.Described EPA bus control circuit module 12 can also receive EPA message bag from described EPA bus, and process is unpacked to described EPA message bag thus obtains data, the described data by unpacking acquisition are outputted to described data buffer 131 by described EPA bus control circuit module 12.
Described data buffer 131 comprises data and just receives district 1311 and a data transmission interval 1312; Described pci bus control circuit module 11 writes data to described data transmission interval 1312 and reads data from described data receiver district 1311; Described EPA bus control circuit module 12 obtains data from described data transmission interval 1312, and the described data by unpacking acquisition are outputted to described data receiver district 1311.
Preferably, described communication control module 13 also comprises conflict arbitration circuit 132; Described conflict arbitration circuit 132 coordinates the data processing conflict between described pci bus control circuit module 11 and described EPA bus control circuit module 12; Preferably, described conflict arbitration circuit 132 prevents described pci bus control circuit module 11 and described EPA bus control circuit module 12 from synchronously operating data buffer.Concrete; The described conflict arbitration circuit 132 data processing contention mechanism coordinated between described pci bus control circuit module 11 and described EPA bus control circuit module 12 comprises in following mechanism one and multiple: when described in described pci bus control circuit module 11 and described EPA bus control circuit module 12 a pair, data buffer 131 operates, described conflict arbitration module 132 blocks the operation of another module to data buffer automatically; When described pci bus control circuit module 11 and described EPA bus control circuit module 12 initiate the operation to data buffer simultaneously, conflict arbitration module 132 blocks the operation of EPA bus control circuit module 12; And when described pci bus control circuit module 11 or described EPA bus control circuit module 12 are at the new data write to described data buffer 131, described data buffer is fully loaded with, then use new data to cover the oldest data.
Preferred further, described communication control module 13 also comprises EPA bus configuration district 133.Described pci bus control circuit module 11 writes EPA configuration parameter to described EPA bus configuration district 133, and described EPA bus control circuit module 12 reads the EPA configuration parameter in described EPA bus configuration district 133, and runs according to described EPA configuration parameter.Described communication control module 13 can also comprise logo area 134.The described data by unpacking acquisition are outputted to described data buffer 131 by described EPA bus control circuit module 12, concrete for outputting to described data receiver district 134; Simultaneously, Data Update mark is exported to described logo area 134, described pci bus control circuit module 11 detects the Data Update mark of described logo area 134, and detecting upgrade mark after read the data of described data buffer 131, the data in concrete is described data receiver district 134.
Compared with prior art, realize being interconnected of described EPA bus and pci bus by described communication control module 13 between EPA bus control circuit module 12 of the present invention and pci bus control circuit module 11, thus the data achieved between EPA bus and pci bus are transmitted.Described conflict arbitration circuit 132 is coordinated described EPA bus control circuit module 12 and is conflicted with pci bus control circuit module 11 data processing, thus ensure that described EPA bus control circuit module 12 normally works at different rates with pci bus control circuit module 11, avoid access conflict and corrupted data, loss.Described EPA bus configuration district 133 obtains the configuration information of EPA bus from described pci bus control circuit module 11, described EPA bus control circuit module 12 reads described EPA bus configuration district 133 configuration information, and run according to described configuration information, thus the flexible configuration of EPA bus being carried out from pci bus end can be achieved.
Although the present invention discloses as above with preferred embodiment, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (10)
1. a data transmission device between EPA bus and pci bus, is characterized in that, comprises a pci bus control circuit module, an EPA bus control circuit module and the communication control module between them; Described communication control module comprises a data buffer, main control equipment controls described pci bus control circuit module and reads and writes data to described data buffer, described EPA bus control circuit module obtains data from described data buffer and institute's data is carried out packing process and forms EPA message bag, and described EPA message bag can transmit in EPA bus;
Described EPA bus control circuit module can also receive EPA message bag from described EPA bus, and process is unpacked to described EPA message bag thus obtains data, the data unpacking acquisition described in passing through are outputted to described data buffer by described EPA bus control circuit module;
Described communication control module also comprises a conflict arbitration circuit, and described conflict arbitration circuit is for coordinating the data processing conflict between described pci bus control circuit module and described EPA bus control circuit module;
When described in described pci bus control circuit module and described EPA bus control circuit module a pair, data buffer operates, described conflict arbitration circuit blocks the operation of another module to data buffer automatically; When described pci bus control circuit module and described EPA bus control circuit module initiate the operation to data buffer simultaneously, conflict arbitration circuit blocks the operation of EPA bus control circuit module; And when described pci bus control circuit module or described EPA bus control circuit module are when to described data buffer write new data, described data buffer is fully loaded with, then use new data to cover the oldest data.
2. data transmission device between EPA bus and pci bus as claimed in claim 1, is characterized in that: the data processing conflict between described coordination pci bus control circuit module and described EPA bus control circuit module refers to and prevents described pci bus control circuit module and described EPA bus control circuit module synchronization from operating data buffer.
3. data transmission device between EPA bus and pci bus as claimed in claim 2, is characterized in that: the arbitration mechanism of described prominent arbitration circuit comprises: described pci bus control circuit module and described EPA bus control circuit module can only have one of them to operate data buffer at synchronization.
4. data transmission device between EPA bus and pci bus as claimed in claim 3, is characterized in that: the arbitration mechanism of described prominent arbitration circuit comprises: when described in described pci bus control circuit module and described EPA bus control circuit module a pair, data buffer operates, described conflict arbitration module blocks the operation of another module to data buffer automatically.
5. data transmission device between EPA bus and pci bus as claimed in claim 4, it is characterized in that: the arbitration mechanism of described prominent arbitration circuit comprises: when described pci bus control circuit module and described EPA bus control circuit module initiate the operation to data buffer simultaneously, conflict arbitration module blocks the operation of EPA bus control circuit module.
6. data transmission device between EPA bus and pci bus as claimed in claim 2, it is characterized in that: the arbitration mechanism of described prominent arbitration circuit comprises: when described pci bus control circuit module or described EPA bus control circuit module are at the new data write to described data buffer, described data buffer is fully loaded with, then use new data to cover the oldest data.
7. data transmission device between EPA bus and pci bus as claimed in claim 1, it is characterized in that: described data buffer also comprises a data transmission interval and a data receiver district, described pci bus control circuit module is to described data transmission interval write data and from described data receiver district reading data; Described EPA bus control circuit module obtains data from described data transmission interval, and the described data by unpacking acquisition are outputted to described data receiver district.
8. the EPA bus according to any one of claim 1 to 7 and data transmission device between pci bus, it is characterized in that: described communication control module also comprises an EPA bus configuration district, described pci bus control circuit module is to described EPA bus configuration district write EPA configuration parameter, described EPA bus control circuit module reads the EPA configuration parameter in described EPA bus configuration district, and runs according to described EPA configuration parameter.
9. the EPA bus according to any one of claim 1 to 7 and data transmission device between pci bus, it is characterized in that: described communication control module also comprises a logo area, the described data by unpacking acquisition are outputted to described data buffer by described EPA bus control circuit module, export Data Update mark to described logo area simultaneously; Described pci bus control circuit module detects the Data Update mark of described logo area, and the data upgrading the described data buffer of the rear reading of mark detected.
10. the EPA bus according to any one of claim 1 to 7 and data transmission device between pci bus, is characterized in that: described pci bus control circuit module is CompactPCI or PC/104 bus control circuit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210150986.1A CN102681967B (en) | 2012-05-16 | 2012-05-16 | Data transmission device between EPA and pci bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210150986.1A CN102681967B (en) | 2012-05-16 | 2012-05-16 | Data transmission device between EPA and pci bus |
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| Publication Number | Publication Date |
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| CN102681967A CN102681967A (en) | 2012-09-19 |
| CN102681967B true CN102681967B (en) | 2016-01-06 |
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| CN201210150986.1A Active CN102681967B (en) | 2012-05-16 | 2012-05-16 | Data transmission device between EPA and pci bus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113742269B (en) * | 2021-11-03 | 2022-02-22 | 浙江国利信安科技有限公司 | Data transmission method, processing device and medium for EPA device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1426203A (en) * | 2001-12-11 | 2003-06-25 | 深圳市中兴通讯股份有限公司上海第二研究所 | Transmission device and method for data package between different buses |
| CN1610328A (en) * | 2003-10-17 | 2005-04-27 | 西安大唐电信有限公司 | Repeater apparatus for data packet of different interbus and transmitting method thereof |
| CN101718985A (en) * | 2009-11-12 | 2010-06-02 | 中环天仪股份有限公司 | EPA bus and Profibus-DP bus conversion adapter |
| CN101729453A (en) * | 2009-11-12 | 2010-06-09 | 中环天仪股份有限公司 | EPA bus and MODBUS bus conversion adapter |
-
2012
- 2012-05-16 CN CN201210150986.1A patent/CN102681967B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1426203A (en) * | 2001-12-11 | 2003-06-25 | 深圳市中兴通讯股份有限公司上海第二研究所 | Transmission device and method for data package between different buses |
| CN1610328A (en) * | 2003-10-17 | 2005-04-27 | 西安大唐电信有限公司 | Repeater apparatus for data packet of different interbus and transmitting method thereof |
| CN101718985A (en) * | 2009-11-12 | 2010-06-02 | 中环天仪股份有限公司 | EPA bus and Profibus-DP bus conversion adapter |
| CN101729453A (en) * | 2009-11-12 | 2010-06-09 | 中环天仪股份有限公司 | EPA bus and MODBUS bus conversion adapter |
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| CN102681967A (en) | 2012-09-19 |
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