CN103777070A - Rack-type electricity meter possessing I2C bus competitive mechanism - Google Patents
Rack-type electricity meter possessing I2C bus competitive mechanism Download PDFInfo
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- CN103777070A CN103777070A CN201210415850.9A CN201210415850A CN103777070A CN 103777070 A CN103777070 A CN 103777070A CN 201210415850 A CN201210415850 A CN 201210415850A CN 103777070 A CN103777070 A CN 103777070A
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- main card
- subcard
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Abstract
The present invention provides a rack-type electricity meter possessing an I2C bus competitive mechanism. The rack-type electricity meter possessing the I2C bus competitive mechanism comprises a main card and a plurality of sub-cards, wherein the main card and the plurality of sub-cards are in physical connection via an I2C double-line rule, and are all arranged as slave modes. Only when the main card and the plurality of sub-cards need to send data to other cards, the own modes of the main card and the plurality of sub-cards are arranged as the master modes, at the same time, the own slave modes are closed. Compared with the prior art, the main card queries the data of the sub-cards circularly, so that only one device is always located in the master mode on a bus, and accordingly, the situation that two or more than two devices are located in the master mode simultaneously does not occur, and the normal communication can be guaranteed.
Description
Technical field
The present invention relates to field industrial control field, relate in particular to a kind of tool I
2the rack ammeter of C bus contention mechanism.
Background technology
In existing industrial technology field, I
2c bus communication technology is widely used, I
2c equipment has two kinds of mode of operations: host mode and slave mode.Be connected to each I in bus
2c equipment both can be used as I
2the main frame of C can be used as again I
2the slave of C, even can one equipment simultaneously in main frame and slave mode, but bus has main process equipment to control conventionally, if so have two or more equipment in bus in host mode simultaneously, like that just have multiple equipment control bus simultaneously, cause bus confusion, impact communication.
Therefore be necessary to provide a kind of new I
2c communication mode solves the problems referred to above.
Summary of the invention
The present invention relates to a kind of tool I
2the rack ammeter of C bus contention mechanism.
To achieve the above object of the invention, the invention provides a kind of tool I
2the rack ammeter of C bus contention mechanism, it comprises a main card, some subcards, described main card and described some subcards adopt I
2c two-wire rule is carried out physical connection, the data on described each subcard of main card cyclic query, wherein said main card and described some subcards, in use all be set to slave mode, only, in the time that needs send data to other cards, self is set to host mode, closes slave mode simultaneously; While completing data transmission, self is set to slave mode, simultaneously Shutdown Hosts pattern.
As a further improvement on the present invention, tool I
2the rack ammeter of C bus contention mechanism, the data on described each subcard of main card cyclic query, first send querying command to described a certain subcard by described main card, and described a certain subcard is received after querying command, sends corresponding data to main card.
The present invention also provides a kind of communication means, and a kind of communication means based on claim 1, comprises the following steps, and self is set to host mode main card, closes slave mode, sends querying command to subcard; It is complete that main card sends querying command, and self is set to slave mode, Shutdown Hosts pattern; Subcard is received querying command, and self is set to host mode, closes slave mode, sends corresponding data to main card; It is complete that subcard sends data, and self is set to slave mode, Shutdown Hosts pattern.
Compared with prior art, tool I provided by the present invention
2rack ammeter and the communication mode of C bus contention mechanism, no matter main card or subcard, all be arranged under normal circumstances slave mode, only have in the time that self need to send data to other card and just self be set to host mode, close the slave function of self simultaneously, after being sent completely, self is set to slave mode immediately, closes the host function of self.Because main card is the data at each subcard of cyclic query, therefore in bus, will only have an equipment in host mode always, so just there will not be in bus and occur that two or more equipment, simultaneously in host mode, just can ensure normally carrying out of communication.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing relevant of the present invention in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of one embodiment of the invention;
Fig. 2 is communication mode process flow diagram of the present invention.
Embodiment
Describe the present invention below with reference to each embodiment shown in the drawings.But these embodiment do not limit the present invention, the conversion in structure, method or function that those of ordinary skill in the art makes according to these embodiment is all included in protection scope of the present invention.
Shown in ginseng Fig. 1 and Fig. 2, tool I provided by the present invention
2the rack ammeter of C bus contention mechanism, it comprises a main card, subcard 1, subcard 2, subcard 3, described main card and described subcard 1, subcard 2, subcard 3 adopts I
2c two-wire rule is carried out physical connection, data on described each subcard of main card cyclic query, wherein said main card and described subcard 1, subcard 2 and subcard 3 are in use all set to slave mode, in the time that needs send data to other cards, self is set to host mode, closes slave mode simultaneously; While completing data transmission, self is set to slave mode, simultaneously Shutdown Hosts pattern.
Concrete, tool I
2the rack ammeter of C bus contention mechanism, the data on described each subcard of main card cyclic query, first send querying command to described a certain subcard by described main card, and described a certain subcard is received after querying command, sends corresponding data to main card.
Based on above-mentioned rack ammeter, the present invention also provides a kind of communication means, comprise the following steps,
S110, self is set to host mode main card, closes slave mode, sends querying command to subcard;
S120, it is complete that main card sends querying command, and self is set to slave mode, Shutdown Hosts pattern;
S130, subcard is received querying command, self is set to host mode, closes slave mode, sends corresponding data to main card;
S140, it is complete that subcard sends data, and self is set to slave mode, Shutdown Hosts pattern.
Tool I provided by the present invention
2rack ammeter and the communication mode of C bus contention mechanism, no matter main card or subcard, all be arranged under normal circumstances slave mode, only have in the time that self need to send data to other card and just self be set to host mode, close the slave function of self simultaneously, after being sent completely, self is set to slave mode immediately, closes the host function of self.Because main card is the data at each subcard of cyclic query, therefore in bus, will only have an equipment in host mode always, so just there will not be in bus and occur that two or more equipment, simultaneously in host mode, just can ensure normally carrying out of communication.
Be to be understood that, although this instructions is described according to embodiment, but be not that each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should make instructions as a whole, technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.
Listed a series of detailed description is above only illustrating for feasibility embodiment of the present invention; they are not in order to limit the scope of the invention, all do not depart from the equivalent embodiment that skill spirit of the present invention does or change and all should be included in protection scope of the present invention within.
Claims (3)
1. a tool I
2the rack ammeter of C bus contention mechanism, comprises a main card, some subcards, and described main card and described some subcards adopt I
2c two-wire rule is carried out physical connection, the data on described each subcard of main card cyclic query, wherein said main card and described some subcards, in use all be set to slave mode, only, in the time that needs send data to other cards, self is set to host mode, closes slave mode simultaneously; While completing data transmission, self is set to slave mode, simultaneously Shutdown Hosts pattern.
2. have as claimed in claim 1 an I
2the rack ammeter of C bus contention mechanism, is characterized in that, the data on described each subcard of main card cyclic query first send querying command to described a certain subcard by described main card, and described a certain subcard is received after querying command, sends corresponding data to main card.
3. the communication means based on claim 1, is characterized in that, comprise the following steps,
Self is set to host mode main card, closes slave mode, sends querying command to subcard;
It is complete that main card sends querying command, and self is set to slave mode, Shutdown Hosts pattern;
Subcard is received querying command, and self is set to host mode, closes slave mode, sends corresponding data to main card;
It is complete that subcard sends data, and self is set to slave mode, Shutdown Hosts pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210415850.9A CN103777070B (en) | 2012-10-26 | 2012-10-26 | The communication means of the rack ammeter of tool I2C bus contention mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210415850.9A CN103777070B (en) | 2012-10-26 | 2012-10-26 | The communication means of the rack ammeter of tool I2C bus contention mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103777070A true CN103777070A (en) | 2014-05-07 |
| CN103777070B CN103777070B (en) | 2016-08-03 |
Family
ID=50569548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210415850.9A Expired - Fee Related CN103777070B (en) | 2012-10-26 | 2012-10-26 | The communication means of the rack ammeter of tool I2C bus contention mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103777070B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108920401A (en) * | 2018-06-04 | 2018-11-30 | 深圳柴火创客教育服务有限公司 | It is more main mostly from I2C communication means, system and node device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123492A (en) * | 1994-11-19 | 1996-05-29 | 张胤微 | Master/slave structure system for power network communication |
| US5742512A (en) * | 1995-11-30 | 1998-04-21 | General Electric Company | Electronic electricity meters |
| CN101154093A (en) * | 2006-09-26 | 2008-04-02 | 力博特公司 | Method and apparatus for competing for host computer position in parallel system |
| CN101261613A (en) * | 2007-03-09 | 2008-09-10 | 南京理工大学 | Image processor team interface bus |
| CN201707393U (en) * | 2010-03-12 | 2011-01-12 | 深圳市思达仪表有限公司 | Electricity meter with keyboard |
| CN201757758U (en) * | 2010-03-12 | 2011-03-09 | 深圳市思达仪表有限公司 | Antistatic ammeter |
| CN102096996A (en) * | 2010-12-01 | 2011-06-15 | 刘晓野 | Centralized meter reading system for electric energy meter |
| GB2485000A (en) * | 2010-11-01 | 2012-05-02 | Northern Design Electronics Ltd | Modular utility meter |
-
2012
- 2012-10-26 CN CN201210415850.9A patent/CN103777070B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123492A (en) * | 1994-11-19 | 1996-05-29 | 张胤微 | Master/slave structure system for power network communication |
| US5742512A (en) * | 1995-11-30 | 1998-04-21 | General Electric Company | Electronic electricity meters |
| CN101154093A (en) * | 2006-09-26 | 2008-04-02 | 力博特公司 | Method and apparatus for competing for host computer position in parallel system |
| CN101261613A (en) * | 2007-03-09 | 2008-09-10 | 南京理工大学 | Image processor team interface bus |
| CN201707393U (en) * | 2010-03-12 | 2011-01-12 | 深圳市思达仪表有限公司 | Electricity meter with keyboard |
| CN201757758U (en) * | 2010-03-12 | 2011-03-09 | 深圳市思达仪表有限公司 | Antistatic ammeter |
| GB2485000A (en) * | 2010-11-01 | 2012-05-02 | Northern Design Electronics Ltd | Modular utility meter |
| CN102096996A (en) * | 2010-12-01 | 2011-06-15 | 刘晓野 | Centralized meter reading system for electric energy meter |
Non-Patent Citations (4)
| Title |
|---|
| 王赟等: "基于I2C串行扩展的并行处理系统设计", 《无线电工程》 * |
| 王韧: "I2C总线技术探析及其应用", 《电气时代》 * |
| 贾朱红等: "基于I2C总线的单主多从单片机之间的通信", 《微计算机信息》 * |
| 郑采君: "基于CPLD的I2C总线接口设计", 《电子设计工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108920401A (en) * | 2018-06-04 | 2018-11-30 | 深圳柴火创客教育服务有限公司 | It is more main mostly from I2C communication means, system and node device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103777070B (en) | 2016-08-03 |
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Address after: 215126 Suzhou City Industrial Park, Suzhou, Su Sheng Tung Road, Hong Kong Street, No. 88 Applicant after: SUZHOU NEWHONGBO INTELLIGENT TECHNOLOGY CO., LTD. Address before: 215126 Suzhou City Industrial Park, Suzhou, Su Sheng Tung Road, Hong Kong Street, No. 88 Applicant before: Suzhou Industrial Prak New Hongbo Communication Technology Co., Ltd. |
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Granted publication date: 20160803 Termination date: 20171026 |