CN101242310B - A master-slave switching method for communication interface board - Google Patents
A master-slave switching method for communication interface board Download PDFInfo
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- CN101242310B CN101242310B CN200810102492XA CN200810102492A CN101242310B CN 101242310 B CN101242310 B CN 101242310B CN 200810102492X A CN200810102492X A CN 200810102492XA CN 200810102492 A CN200810102492 A CN 200810102492A CN 101242310 B CN101242310 B CN 101242310B
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Abstract
The invention discloses a main and reserve switching method of a communication interface board belonging to a communication technology field. Two boards in consecutive slots are main and reserve for each other, wherein the respective reset signal, main and reserve switching signal, CPU heartbeat signal and the slot number are output to two input terminals of an RS trigger coupled by two NAND gates through an AND gate, and the output terminals of the two NAND gates of the RS trigger control the corresponding the main and reserve states of the main and reserve boards respectively. The invention judges which board is in the main state by both a software setting and hardware state, and when hardware failure or software setting occurs error, the method can make sure two boards are all in correct states, which avoids an output conflict and also a hardware damage.
Description
Technical field
The invention belongs to communication technique field, particularly a kind of master-slave switching method for communication interface board.
Background technology
In communication technique field, great majority are used and are all required equipment to have higher reliability and stability, especially at railway, electric power, public security, in the middle of the controlling equipments such as army, even if the service disconnection of short time also will cause loss difficult to the appraisal to the client, the dual-host backup that this just requires each veneer in the communication apparatus and module to have the load sharing pattern, promptly when operate as normal, fallback circuit all is in the state of working alone, in case the master is broken down with circuit then fallback circuit will be born whole processing immediately, this structure had both guaranteed the reliability of system, had improved the utilance and the disposal ability of system again.
Summary of the invention
A kind of master-slave switching method for communication interface board, the active and standby each other usefulness of the veneer of two adjacent slot positions, active and standby plate reset signal, active and standby switching signal, CPU heartbeat signal and slot number separately is input to two inputs of the rest-set flip-flop of being made up of the coupling of two NAND gate through one with door respectively, and the output of two NAND gate of rest-set flip-flop is controlled the active and standby state of using of corresponding mainboard or slave board respectively;
The value of described slot number depends on the position at veneer place, and strange groove position is a high level, and even groove position is a low level;
The value of described CPU heartbeat signal depends on whether CPU exports pulse, and when pulse was exported, the CPU heartbeat signal was a high level, otherwise was low level.
Described reset signal, CPU heartbeat signal are high level, when slot number is high level:
1) described active and standby switching signal is that the then corresponding veneer of high level is the main state of using;
2) described active and standby switching signal is that the then corresponding veneer of low level is a stand-by state.
Described reset signal, CPU heartbeat signal are high level, when slot number is low level:
1) described active and standby switching signal is that the then corresponding veneer of low level is a stand-by state;
2) described active and standby switching signal is that high level then has only when just being upgraded to main board with it when the veneer of active and standby usefulness is stand-by state each other.
Described reset signal, CPU heartbeat signal any one when being low level, corresponding veneer is forced to switch to stand-by state.
When two veneers of software setting all are under the situation of main usefulness, and veneer carries out ruling by the hardware slot number when all possessing the condition that is upgraded to main usefulness, and promptly the veneer of strange slot number preferentially is upgraded to the main state of using.
Software is by the A of described NAND gate
IN1And B
IN1Two mutual exclusion lines are diagnosed veneer, detect the current state to method, single.
This method is carried out the active and standby with control of veneer by CPU heartbeat signal, reset signal, active and standby switching signal and slot number.Two of active and standby usefulness veneers can only have a veneer to be in the master and use state when work each other, and another piece veneer is in stand-by state.Can both guarantee that when hardware fault or software setting mistake occurring two veneers are in correct state.This method decides jointly that by software setting and hardware state which veneer is in the master and uses state, has avoided the output conflict, also prevents the hardware damage of bringing thus.
Description of drawings
Fig. 1 is a connection connection layout of the present invention.
Embodiment
The invention provides a kind of master-slave switching method for communication interface board, technical scheme of the present invention is further described below in conjunction with accompanying drawing and concrete execution mode.
Fig. 1 is a connection connection layout of the present invention, the active and standby each other usefulness of the veneer of two adjacent slot positions, active and standby plate reset signal, active and standby switching signal, CPU heartbeat signal and slot number separately is input to two inputs of the rest-set flip-flop of being made up of the coupling of two NAND gate through one with door respectively, and the output of two NAND gate of rest-set flip-flop is controlled the active and standby state of using of corresponding mainboard or slave board respectively;
The value of described slot number depends on the position at veneer place, and strange groove position is a high level, and even groove position is a low level;
The value of described CPU heartbeat signal depends on whether CPU exports pulse, and when pulse was exported, the CPU heartbeat signal was a high level, otherwise was low level.
This method has following three stable states:
1.A plate master usefulness, the B plate is standby.
The reset signal of A plate, CPU heartbeat signal, slot number all are high level under this state, and active and standby switching signal is a high level, through exporting A later on to door
IN2, A
IN2Be high level, A
IN1Be high level, A
IN1And A
IN2Through exporting A after the NAND gate to
OUT, A
OUTBe low level, this pin drives this plate relay and enters the main state of using.
The reset signal of B plate, CPU heartbeat signal, slot number all are high level under this state, and active and standby switching signal is a low level, through exporting B later on to door
IN2, B
IN2Be high level, B
IN1Be low level, B
IN1And B
IN2Through exporting B after the NAND gate to
OUT, B
OUTBe high level, this pin drives this plate relay and enters stand-by state.
2.B plate master usefulness, the A plate is standby.
The reset signal of B plate, CPU heartbeat signal, slot number all are high level under this state, and active and standby switching signal is a high level, through exporting B later on to door
IN2, B
IN2Be high level, B
IN1Be high level, B
IN1And B
IN2Through exporting B after the NAND gate to
OUT, B
OUTBe low level, this pin drives this plate relay and enters the main state of using.
The reset signal of A plate, CPU heartbeat signal, slot number all are high level under this state, and active and standby switching signal is a low level, through exporting A later on to door
IN2, A
IN2Be high level, A
IN1Be low level, A
IN1And A
IN2Through exporting A after the NAND gate to
OUT, A
OUTBe high level, this pin drives this plate relay and enters stand-by state.
3.A plate is standby, the B plate is standby.
The active and standby switching signal of A plate is a low level under this state, and through exporting AIN2 later on to door, AIN2 is a low level, AIN1 is a high level, AIN1 and AIN2 export AOUT to through after the NAND gate, and AOUT is a high level, and this pin drives this plate relay and enters stand-by state.
The active and standby switching signal of B plate is a low level under this state, and through exporting BIN2 later on to door, BIN2 is a low level, BIN1 is a high level, BIN1 and BIN2 export BOUT to through after the NAND gate, and BOUT is a high level, and this pin drives this plate relay and enters stand-by state.
Described reset signal, CPU heartbeat signal are high level, when slot number is low level:
1) described active and standby switching signal is that the then corresponding veneer of low level is a stand-by state;
2) described active and standby switching signal is that high level then has only when just being upgraded to main board with it when the veneer of active and standby usefulness is stand-by state each other.
Described reset signal, CPU heartbeat signal any one when being low level, corresponding veneer is forced to switch to stand-by state.
When two veneers of software setting all are under the situation of main usefulness, and veneer carries out ruling by the hardware slot number when all possessing the condition that is upgraded to main usefulness, and promptly the veneer of strange slot number preferentially is upgraded to the main state of using.
Software can pass through A
IN1And B
IN1Two mutual exclusion lines are diagnosed veneer, promptly can detect the current state to method, single.
When two veneers all possess the condition of doing main board, if mistake appears in software control this moment, promptly two veneers all are arranged to lead and are then decided by slot number with state, slot number is that high level is that the veneer of odd bin number will switch to main using, it is standby that slot number is that low level is that the veneer of even bin number switches to pressure, avoided the generation of two main phenomenons.
Claims (4)
1. master-slave switching method for communication interface board, it is characterized in that, the active and standby each other usefulness of the veneer of two adjacent slot positions, active and standby plate reset signal, active and standby switching signal, CPU heartbeat signal and slot number separately is input to two inputs of the rest-set flip-flop of being made up of the coupling of two NAND gate through one with door respectively, and the output of two NAND gate of rest-set flip-flop is controlled the active and standby state of using of corresponding mainboard or slave board respectively;
When two veneers of software setting all are under the situation of main usefulness, and veneer carries out ruling by the hardware slot number when all possessing the condition that is upgraded to main usefulness, the veneer that is strange slot number preferentially is upgraded to the main state of using, at this moment, the value of slot number depends on the position at veneer place, strange groove position is a high level, and even groove position is a low level;
The value of described CPU heartbeat signal depends on whether CPU exports pulse, and when pulse was exported, the CPU heartbeat signal was a high level, otherwise was low level;
Described reset signal, CPU heartbeat signal are high level, and when slot number was low level, described active and standby switching signal was that the then corresponding veneer of low level is a stand-by state; Described active and standby switching signal is that high level then has only when just being upgraded to main board with it when the veneer of active and standby usefulness is stand-by state each other.
2. a kind of master-slave switching method for communication interface board according to claim 1 is characterized in that, described reset signal, CPU heartbeat signal are high level, when slot number is high level:
1) described active and standby switching signal is that the then corresponding veneer of high level is the main state of using;
2) described active and standby switching signal is that the then corresponding veneer of low level is a stand-by state.
3. a kind of master-slave switching method for communication interface board according to claim 1 is characterized in that, described reset signal, CPU heartbeat signal any one when being low level, corresponding veneer is forced to switch to stand-by state.
4. according to the described a kind of master-slave switching method for communication interface board of claim 1, it is characterized in that software is by the A of described NAND gate
IN1And B
IN1Two mutual exclusion lines are diagnosed veneer, detect the current state to method, single.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810102492XA CN101242310B (en) | 2008-03-21 | 2008-03-21 | A master-slave switching method for communication interface board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810102492XA CN101242310B (en) | 2008-03-21 | 2008-03-21 | A master-slave switching method for communication interface board |
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| Publication Number | Publication Date |
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| CN101242310A CN101242310A (en) | 2008-08-13 |
| CN101242310B true CN101242310B (en) | 2010-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810102492XA Expired - Fee Related CN101242310B (en) | 2008-03-21 | 2008-03-21 | A master-slave switching method for communication interface board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500978A (en) * | 2018-03-08 | 2018-09-07 | 歌尔股份有限公司 | A kind of robot controller, method and robot |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714109B (en) * | 2009-11-24 | 2013-03-20 | 杭州华三通信技术有限公司 | Method and device for controlling mainboard of double CPU system |
| CN101876962B (en) * | 2009-12-15 | 2013-04-10 | 龙芯中科技术有限公司 | Method and device for controlling hot plug of master/slave board |
| CN104678817B (en) * | 2013-11-28 | 2017-11-03 | 中国航空工业集团公司航空动力控制系统研究所 | The active and standby logic switching circuit of aero-engine digital electronic controller binary channels |
| CN106648995B (en) * | 2016-11-29 | 2019-11-19 | 浙江大华技术股份有限公司 | The first host, hot backup system and method in a kind of hot backup system |
| CN107547281B (en) * | 2017-09-18 | 2020-07-24 | 通鼎互联信息股份有限公司 | Main/standby competition method, device and application equipment |
| CN107992023A (en) * | 2017-11-29 | 2018-05-04 | 中核控制系统工程有限公司 | A kind of high precision analog exports self diagnosis redundancy switching circuit |
| CN107942646B (en) * | 2017-12-27 | 2024-01-23 | 卡斯柯信号有限公司 | Safety independent active/standby switching equipment and method |
| CN110750394B (en) * | 2019-09-25 | 2023-05-30 | 深圳震有科技股份有限公司 | Control method and terminal for realizing active/standby single board based on GPIO pin |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2624529Y (en) * | 2002-11-09 | 2004-07-07 | 深圳市中兴通讯股份有限公司 | Main and spare circuit board switching unit |
| CN1601991A (en) * | 2003-09-22 | 2005-03-30 | 中兴通讯股份有限公司 | Device and method of processing main spared inversion of synchronous system |
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2008
- 2008-03-21 CN CN200810102492XA patent/CN101242310B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2624529Y (en) * | 2002-11-09 | 2004-07-07 | 深圳市中兴通讯股份有限公司 | Main and spare circuit board switching unit |
| CN1601991A (en) * | 2003-09-22 | 2005-03-30 | 中兴通讯股份有限公司 | Device and method of processing main spared inversion of synchronous system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500978A (en) * | 2018-03-08 | 2018-09-07 | 歌尔股份有限公司 | A kind of robot controller, method and robot |
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