CN103793352A - I2C (Inter-Integrated Circuit) bus address conflict preventable communication device - Google Patents
I2C (Inter-Integrated Circuit) bus address conflict preventable communication device Download PDFInfo
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- CN103793352A CN103793352A CN201210423060.5A CN201210423060A CN103793352A CN 103793352 A CN103793352 A CN 103793352A CN 201210423060 A CN201210423060 A CN 201210423060A CN 103793352 A CN103793352 A CN 103793352A
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Abstract
The invention discloses an I2C (Inter-Integrated Circuit) bus address conflict preventable communication device. The I2C bus address conflict preventable communication device is connected with a microcontroller and a peripheral device circuit of the microcontroller through an I2C bus; the I2C bus is provided with a host and a plurality of from machine addresses; read-write operation can be performed on the from machines through the host; a unique identification code is configured on every from machine; when the host needs to be communicated and interacted with one of the from machines, the address of the from machine and the identification code of the from machine are sent together to the bus through the host and the from machine needs to further determine whether the identification code sent from the host is consistent with the self-identification-code or not when the condition that the address sent from the host is consistent with the self-address is monitored by the from machine to further respond.
Description
Technical field
The invention belongs to domain of communication equipment, be specifically related to a kind of communication apparatus of the I2C of preventing bus address conflict.
Background technology
Communication apparatus of the prior art is for connecting the common employing I2C((Inter-Integrated Circuit of microcontroller and peripheral line thereof)) bus, I2C bus communication all needs to use in a lot of occasions, in synchronization, in I2C bus, only allow a main frame, can have multiple slaves, main frame can carry out read-write operation to slave.Each slave has the slave addresses of seven, when main frame carries out read-write operation to a certain slave, all the address of this slave is sent in bus together at every turn, and each slave is being monitored bus, in the time that slave finds that the slave addresses of the slave addresses and slave self sent of main frame is consistent, main frame is responded, otherwise do not respond, so require the address of each slave not identical.If there is two or more slave addresses identical in I2C bus, multiplely respond together main frame from chance, and now main frame cannot be differentiated two slaves that address is identical, thereby easily cause communication data to make mistakes, especially support on the equipment of hot plug at some, I2C slave can access or depart from bus at any time, now just easily occurs because of misoperation or other reason, and two identical I2C slaves in address are accessed to bus simultaneously.Therefore, need to improve existing communication equipment I 2C bus.
Summary of the invention
The object of this invention is to provide a kind of communication apparatus of the I2C of preventing bus address conflict.
For achieving the above object, the technical solution used in the present invention is:
The communication apparatus that prevents the conflict of I2C bus address of the present invention, this communication apparatus connects the employing I2C bus of microcontroller and peripheral line thereof, in I2C bus, have a main frame and dispose respectively the multiple slaves in address, main frame can carry out read-write operation to slave; Each slave disposes unique identification code, in the time that main frame need communicate interaction with a certain slave, main frame sends to the identification code of the address of this slave and this slave in bus together, slave listens to address that main frame sends when consistent with self address, needs further to judge that whether identification code that main frame sends and self identification code be consistent just can do further response.
It has following beneficial effect to the communication apparatus of the I2C of preventing bus address of the present invention conflict compared to existing technology: in use procedure, realize the function that can prevent the conflict of I2C bus address by the judgement that increases slave self unique identification code.
Accompanying drawing explanation
Fig. 1 is communication apparatus I2C principle of work schematic diagram of the present invention.
Embodiment
Further describe detailed technology content of the present invention below in conjunction with accompanying drawing.
The common employing I2C((Inter-Integrated Circuit of the connection microcontroller of communication apparatus of the present invention and peripheral line thereof)) bus, in I2C bus, there are a main frame and multiple slave, main frame can carry out read-write operation to slave.Each slave all disposes the address of seven and unique identification code, in the time that main frame need communicate interaction with a certain slave, main frame sends to the identification code of the address of this slave and this slave in bus together, slave listens to address that main frame sends when consistent with self address, the identification code again main frame being sent and self identification code contrast, if consistent, respond main frame, otherwise, do not respond main frame; Increase the whether consistent judgement of slave identification code when interactive with main frame, solved in bus when slave addresses repeats the problem of communication data entanglement.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also carry out suitable change and modification to above-mentioned embodiment.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection domain of claim of the present invention modifications and changes more of the present invention.
Claims (1)
1. one kind can prevent the communication apparatus of I2C bus address conflict, this communication apparatus connects the employing I2C bus of microcontroller and peripheral line thereof, in I2C bus, have a main frame and dispose respectively the multiple slaves in address, main frame can carry out read-write operation to slave; It is characterized in that: each slave disposes unique identification code, in the time that main frame need communicate interaction with a certain slave, main frame sends to the identification code of the address of this slave and this slave in bus together, slave listens to address that main frame sends when consistent with self address, needs further to judge that whether identification code that main frame sends and self identification code be consistent just can do further response.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210423060.5A CN103793352A (en) | 2012-10-30 | 2012-10-30 | I2C (Inter-Integrated Circuit) bus address conflict preventable communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210423060.5A CN103793352A (en) | 2012-10-30 | 2012-10-30 | I2C (Inter-Integrated Circuit) bus address conflict preventable communication device |
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| Publication Number | Publication Date |
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| CN103793352A true CN103793352A (en) | 2014-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210423060.5A Pending CN103793352A (en) | 2012-10-30 | 2012-10-30 | I2C (Inter-Integrated Circuit) bus address conflict preventable communication device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110704870A (en) * | 2019-09-16 | 2020-01-17 | 合肥星空物联信息科技有限公司 | Separated file isolation reading system |
| CN113970362A (en) * | 2020-07-09 | 2022-01-25 | 成都秦川物联网科技股份有限公司 | Electronic temperature conversion type diaphragm gas meter verification method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1255027A (en) * | 1998-11-23 | 2000-05-31 | 朗迅科技公司 | Method and device for determining unique address to recognize hardware unit on common bus |
| US20060123173A1 (en) * | 2004-11-15 | 2006-06-08 | Ying-Lang Chuang | Multimedia playback system and method of detecting an extended device thereof |
| CN101208679A (en) * | 2005-04-29 | 2008-06-25 | 皇家飞利浦电子股份有限公司 | Device identification coding of inter-integrated circuit slave devices |
| CN101539900A (en) * | 2008-03-18 | 2009-09-23 | 英业达股份有限公司 | Device for solving conflict generated between two I<2>C slave devices with same addressing address |
| US20120191889A1 (en) * | 2011-01-24 | 2012-07-26 | Digital Imaging Systems Gmbh | Method to differentiate identical devices on a two-wire interface |
-
2012
- 2012-10-30 CN CN201210423060.5A patent/CN103793352A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1255027A (en) * | 1998-11-23 | 2000-05-31 | 朗迅科技公司 | Method and device for determining unique address to recognize hardware unit on common bus |
| US20060123173A1 (en) * | 2004-11-15 | 2006-06-08 | Ying-Lang Chuang | Multimedia playback system and method of detecting an extended device thereof |
| CN101208679A (en) * | 2005-04-29 | 2008-06-25 | 皇家飞利浦电子股份有限公司 | Device identification coding of inter-integrated circuit slave devices |
| CN101539900A (en) * | 2008-03-18 | 2009-09-23 | 英业达股份有限公司 | Device for solving conflict generated between two I<2>C slave devices with same addressing address |
| US20120191889A1 (en) * | 2011-01-24 | 2012-07-26 | Digital Imaging Systems Gmbh | Method to differentiate identical devices on a two-wire interface |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110704870A (en) * | 2019-09-16 | 2020-01-17 | 合肥星空物联信息科技有限公司 | Separated file isolation reading system |
| CN113970362A (en) * | 2020-07-09 | 2022-01-25 | 成都秦川物联网科技股份有限公司 | Electronic temperature conversion type diaphragm gas meter verification method |
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Application publication date: 20140514 |