CN106598888A - Multi-board card communication system and method adopting RS485 protocol - Google Patents
Multi-board card communication system and method adopting RS485 protocol Download PDFInfo
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- CN106598888A CN106598888A CN201611198728.5A CN201611198728A CN106598888A CN 106598888 A CN106598888 A CN 106598888A CN 201611198728 A CN201611198728 A CN 201611198728A CN 106598888 A CN106598888 A CN 106598888A
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- 238000004891 communication Methods 0.000 title claims abstract description 152
- 238000000034 method Methods 0.000 title abstract description 14
- 239000011159 matrix material Substances 0.000 claims description 56
- 238000012216 screening Methods 0.000 claims description 14
- 238000012790 confirmation Methods 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
-
- 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
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/16—Handling requests for interconnection or transfer for access to memory bus
- G06F13/1605—Handling requests for interconnection or transfer for access to memory bus based on arbitration
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0002—Serial port, e.g. RS232C
Abstract
Embodiments of the invention disclose a multi-board card communication system and method adopting an RS485 protocol. A working mode of the communication system and method mainly starts from initiation of communication of a main control board or slave control boards; the slave control boards are arranged according to a priority sequence of slot numbers of slots, in which the slave control boards are located, from low to high; and arbitration buses are applied according to a sequence from low to high. Through communication between multiple groups of RS485 and multiple board cards, the communication efficiency is improved.
Description
Technical field
The present invention relates to graphics hardware field of processors, more particularly to a kind of many board communication systems of employing RS485 agreements
System and method.
Background technology
Passive backplane formula graphics hardware processor system, possesses multiple groove positions, the complication system of various board types.Master control
Communication between plate and other veneers can design 1 32 receipts using RS485 agreements according to the agreement of RS485 in bus.In order to
Many processor system communication speeds from plate are improved, can be by the way of packet communications.Can only be with 1 tunnel bus of synchronization
One communicates from plate, then it is competing that other veneers enables for the packet that should be located from plate wait this just carry out from after plate communication
Strive communication.
The communication of each board non-temporal is isometric, at equal intervals, thus for average packet formula communication modes its efficiency simultaneously
It is non-optimal.
Therefore it provides a kind of multigroup RS485 is communicated with many boards, it is this with the system and method for improving communication efficiency
Art personnel's technical issues that need to address.
The content of the invention
Many board communication systems and method of a kind of employing RS485 agreements are embodiments provided, by multigroup
Communicated between RS485 and many boards, to improve communication efficiency.
A kind of many board communication systems of employing RS485 agreements are embodiments provided, including：
Master control borad, M from control plate and communication switching matrix module；
The master control borad is connected by N+1 RS485 bus with the communication switching matrix module；
Pass through RS485 connection with the communication switching matrix module from control plate described in each；
Also it is connected by N+1 arbitration bus from control plate with the communication switching matrix module described in each；
Wherein, M=1,2,3 ... .n, N=1,2,3 ... .n, M ＜ 32N；
The communication switching matrix module is for logical with the master control borad from control plate application at least described in two in judgement
After news, by the arbitration bus get application communication from control plate slot number, to the application communication from control board slot position
Number carry out screening minimum slot number is obtained from control plate；
The communication switching matrix module is additionally operable to judging the minimum slot number from control plate application to arbitration communication right
After limit, the minimum slot number will be distributed to from control plate in the idle and minimum arbitration bus of circuit sequence number, and dispatched wherein
One RS485 bus is docked from the RS485 circuits of control plate with the minimum slot number.
Preferably, the communication switching matrix module is additionally operable to judging described in only one of which from control plate application and the master
After control plate communication, get it is described from control application information of the plate to the first arbitration bus, by a RS485 buses with described from control
The RS485 circuits of plate are docked.
Preferably, the communication switching matrix module is additionally operable to judging the minimum slot number from control plate application less than secondary
After cutting out communication authority, confirmation have it is described communicate from control plate application and the master control borad and exists be in after the RS485 buses of free time,
By the arbitration bus get application communication from control plate slot number, to it is described application communication from control plate slot number carry out
Screening obtains minimum slot number from control plate.
Preferably, the communication switching matrix module is CPLD devices.
Preferably, the master control borad is also connected by controlling bus with the communication switching matrix module.
Preferably, the communication switching matrix module is provided with difference and turns single-ended signal circuit.
Preferably, the master control borad is connected by N+1 RS485 buses asynchronous communication with the communication switching matrix module
Connect；
It is connected by RS485 circuit asynchronous communications from control plate with the communication switching matrix module described in each.
Preferably, the embodiment of the present invention additionally provides a kind of many board means of communication of employing RS485 agreements, including：
After judging to communicate from control plate application with the master control borad at least described in two, obtained by the arbitration bus
To application communication from control plate slot number, to it is described application communication from control plate slot number carry out screening obtain minimum slot number from
Control plate；
After judging the minimum slot number from control plate application to arbitration communication authority, will be in idle and circuit sequence number most
Low arbitration bus distribute to the minimum slot number from control plate, and dispatch one of RS485 buses with the minigroove position
Number from control plate RS485 circuits docked.
Preferably, a kind of many board means of communication of employing RS485 agreements provided in an embodiment of the present invention, also include：
After judging to communicate from control plate application with the master control borad described in only one of which, get described from control plate to the first arbitration bus
Application information, a RS485 buses are docked with the RS485 circuits from control plate.
Preferably, a kind of many board means of communication of employing RS485 agreements provided in an embodiment of the present invention, also include：
Judge that the minimum slot number is communicated after authority from control plate application less than arbitration, confirmation has described from control plate application and the master control
Plate is communicated and is existed after idle RS485 buses, by the arbitration bus get application communication from control board slot position
Number, screening is carried out from control plate slot number to the application communication minimum slot number is obtained from control plate.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
Many board communication systems and method of a kind of employing RS485 agreements are embodiments provided, wherein, the employing
Many board communication systems of RS485 agreements include：Master control borad, M from control plate and communication switching matrix module；The master control borad with
The communication switching matrix module is by N+1 RS485 buses connection；From control plate and the communication switching matrix mould described in each
Block passes through RS485 connections；Also connected by N+1 arbitration bus from control plate with the communication switching matrix module described in each
Connect；Wherein, M=1,2,3 ... .n, N=1,2,3 ... .n, M ＜ 32N；It is described to communicate switching matrix module for judging at least
Described in two from control plate application and the master control borad communication after, by the arbitration bus get application communication from control board slot
Position number, carries out screening from control plate slot number to the application communication and obtains minimum slot number from control plate；The communication switching square
Array module is additionally operable to after judging the minimum slot number from control plate application to arbitration communication authority, will be in idle and circuit sequence
Number minimum arbitration bus distribute to the minimum slot number from control plate, and dispatch one of RS485 buses and the minimum
Slot number is docked from the RS485 circuits of control plate.The mode of operation of the embodiment of the present invention is mainly from master control borad or from control plate
Communication be initiated as start, from control order of priority of the plate according to the slot number itself being located from low to high, the application of arbitration bus
Order is applied according to order from low to high, by being communicated between multigroup RS485 and many boards, to improve communication effect
Rate.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of structural representation of many board communication systems of employing RS485 agreements provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic flow sheet of many board means of communication of employing RS485 agreements provided in an embodiment of the present invention；
Fig. 3 is that a kind of application of many board communication systems of employing RS485 agreements provided in an embodiment of the present invention is real
Apply illustration to be intended to；
Fig. 4 is the structural representation for communicating switching matrix module；
Fig. 5 communicates switching matrix inside modules address format schematic diagram.
Specific embodiment
Many board communication systems and method of a kind of employing RS485 agreements are embodiments provided, by multigroup
Communicated between RS485 and many boards, to improve communication efficiency.
To enable goal of the invention of the invention, feature, advantage more obvious and understandable, below in conjunction with the present invention
Accompanying drawing in embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that disclosed below
Embodiment be only a part of embodiment of the invention, and not all embodiment.Based on the embodiment in the present invention, this area
All other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present invention
Scope.
Refer to Fig. 1, an a kind of reality of many board communication systems of employing RS485 agreements provided in an embodiment of the present invention
Example is applied, including：
Master control borad, M from control plate and communication switching matrix module；
Master control borad is connected by N+1 RS485 bus with communication switching matrix module；
Each passes through RS485 connection with communication switching matrix module from control plate；
Each is also connected by N+1 arbitration bus from control plate with communication switching matrix module；
Wherein, M=1,2,3 ... .n, N=1,2,3 ... .n, M ＜ 32N；
Switching matrix module is communicated at least two being judged from after control plate application with master control borad communication, by arbitrating
Bus get application communication from control plate slot number, application communication is carried out by screening obtains minigroove position from control plate slot number
Number from control plate；
Communication switching matrix module is additionally operable to after judging minimum slot number from control plate application to arbitration communication authority, will place
Minimum slot number is distributed to from control plate in the idle and minimum arbitration bus of circuit sequence number, and dispatches one of RS485 buses
Docked from the RS485 circuits of control plate with minimum slot number.
Communication switching matrix module is additionally operable to after judging that only one of which is communicated from control plate application and master control borad, get from
Control application information of the plate to the first arbitration bus, a RS485 buses are docked with the RS485 circuits from control plate.
Communication switching matrix module is additionally operable to judging minimum slot number from after controlling plate application less than arbitration communication authority, really
Recognize to have from control plate application and master control borad and communicate and exist after idle RS485 buses, application is got by arbitration bus
Communication from control plate slot number, to application communication from control plate slot number carry out screening obtain minimum slot number from control plate.
Communication switching matrix module is CPLD devices.
Master control borad is also connected by controlling bus with communication switching matrix module.
Communication switching matrix module is provided with difference and turns single-ended signal circuit.
Master control borad is connected by N+1 RS485 bus asynchronous communication with communication switching matrix module；
Each is connected by RS485 circuit asynchronous communications from control plate with communication switching matrix module.
Refer to Fig. 2, an a kind of reality of many board means of communication of employing RS485 agreements provided in an embodiment of the present invention
Example is applied, including：
101st, judge whether that if so, at least two perform 102 from control plate application and master control borad communication, if it is not, performing
103；
Communication switching matrix module judges whether that at least two are communicated from control plate application with master control borad, if so, perform step
Rapid 102, if it is not, execution step 103.
102nd, by arbitration bus get application communication from control plate slot number, to application communication from control plate slot number
Carry out screening minimum slot number is obtained from control plate；
Communication switching matrix module by arbitration bus get application communication from control plate slot number, to application communication
Screening is carried out from control plate slot number minimum slot number is obtained from control plate.
103rd, get from control application information of the plate to the first arbitration bus, by a RS485 buses and from control plate
RS485 circuits are docked；
Communication switching matrix module is got from control application information of the plate to the first arbitration bus, by a RS485 buses
Docked with the RS485 circuits from control plate.
104th, judge whether minimum slot number is applied to arbitration communication authority from control plate, if so, perform 105, if it is not, holding
Row 106；
Screening obtains minimum slot number from after control plate, and communication switching matrix module judges minimum slot number from controlling plate whether Shen
Arbitration communication authority please be arrive, 105 are if so, performed, if it is not, performing 106.
105th, minimum slot number will be distributed to from control plate in the idle and minimum arbitration bus of circuit sequence number, and dispatches which
In a RS485 bus docked from the RS485 circuits of control plate with minimum slot number；
Communication switching matrix module will in the idle and minimum arbitration bus of circuit sequence number distribute to minimum slot number from
Plate is controlled, and dispatches one of RS485 buses and docked from the RS485 circuits of control plate with minimum slot number.
106th, confirm to have from control plate application and master control borad and communicate and exist after idle RS485 buses, re-execute
102。
Communicate switching matrix module and confirm have from control plate application is with master control borad communication and presence is in idle RS485 buses
Afterwards, re-execute step 102.
It is more than detailed description that many board means of communication to a kind of employing RS485 agreements are carried out, for ease of understanding, under
Application with a concrete application scene to a kind of many board means of communication of employing RS485 agreements is illustrated by face, is referred to
Fig. 3, application examples include：
Be 40,3 to M, N peek value, then in system from control plate quantity be 40, RS485 bus numbers be 4, arbitration bus
Respectively DA_1/DA_2/DA_3/DA_4.There are 4 groups of arbitration bus per block from control plate, can successively from 4 tunnel buses from control plate
Filing of the award is communicated, according to the relatively low priority requisition of labelling way, if occupied, then incremented by successively to go application.Such as
Really 4 tunnel buses are occupied, illustrate that the RS485 buses of system all need to wait available free bus in communication, that is,.From control
After the arbitration that plate application is arrived, there is communication switching matrix module to be scheduled the communication of wherein coming of S485 buses.
The function of communication switching matrix module be to switching over from the RS485 holding wires of plate with bus, realization to from
The request for arbitration judgement of plate and the detection of the RS485 communication bus idle conditions to CPU (i.e. master control borad).Design on that module
The difference of RS485 turns single-ended signal circuit, then be converted to the asynchronous communication holding wire of 2 lines from the RS485 of control plate, 40 pieces from plate
Totally 80 road signal.The RS485 buses at this end of CPU are equally converted to single-ended signal in communication switching matrix module, have 8 roads letter
Number.The nucleus module of switching adopts CPLD devices, has controlling bus to dock, carry out internal register configuration between CPU and CPLD
With the management of bus free.
In the present embodiment, realize many from plate, multichannel RS485 bus communication, RS485 buses and arbitration bus way one
Cause.
From the beginning of the mode of operation of the embodiment of the present invention is mainly initiated as from the communication of master control borad or veneer, from plate according to certainly
The slot number that body is located order of priority from low to high, the application order of arbitration bus carry out Shen according to order from low to high
Please.
Specifically, Fig. 4 is referred to, communication switching matrix module is made up of 3 parts, part1 is that 40 tunnels are input into the output of 4 tunnels
Analog channel handover module, part2 be 40 tunnels export 4 tunnels input analog channel handover module, part3 be passage switching post
Storage control module.
Register control module, is controlled by higher level ARM, and communication bus is 4 line SPI.The register controlled of the module is divided into 2
Individual part, one correspondence part1, its two corresponding part2.2 parts export 200bit holding wires respectively to part1 and part2,
Passage therein is controlled.The register address of SPI write part3 adopts 44bit patterns, the numerical value that part3 will be input into
Contrasted with original value, the just write control module for changing, and shape is changed accordingly in the 200bit buses of output
State.Address format is as shown in Figure 5.The numerical value of operation is as shown in table 1.Need to gate that passage, that is, write corresponding numerical value " 1 "
To the depositor being located.
Table 1
Those skilled in the art can be understood that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be described here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematic, for example, the unit
Divide, only a kind of division of logic function can have other dividing mode, such as multiple units or component when actually realizing
Can with reference to or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown or
The coupling each other for discussing or direct-coupling or communication connection can be the indirect couplings by some interfaces, device or unit
Close or communicate to connect, can be electrical, mechanical or other forms.
The unit as separating component explanation can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can local to be located at one, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is realized and as independent production marketing or use using in the form of SFU software functional unit
When, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part for contributing to prior art in other words or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, use so that a computer including some instructions
Equipment (can be personal computer, server, or network equipment etc.) performs the complete of each embodiment methods described of the invention
Portion or part steps.And aforesaid storage medium includes：USB flash disk, portable hard drive, read only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
The above, above example only to illustrate technical scheme, rather than a limitation；Although with reference to front
State embodiment to be described in detail the present invention, it will be understood by those within the art that：Which still can be to front
State the technical scheme described in each embodiment to modify, or equivalent is carried out to which part technical characteristic；And these
Modification is replaced, and does not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. many board communication systems of a kind of employing RS485 agreements, it is characterised in that include：Master control borad, M are individual from control plate and logical
News switching matrix module；
The master control borad is connected by N+1 RS485 bus with the communication switching matrix module；
Pass through RS485 connection with the communication switching matrix module from control plate described in each；
Also it is connected by N+1 arbitration bus from control plate with the communication switching matrix module described in each；
Wherein, M=1,2,3 ... .n, N=1,2,3 ... .n, M ＜ 32N；
It is described communication switching matrix module for judge at least described in two from control plate application and the master control borad communication after,
By the arbitration bus get application communication from control plate slot number, to it is described application communication from control plate slot number carry out
Screening obtains minimum slot number from control plate；
The communication switching matrix module is additionally operable to after judging the minimum slot number from control plate application to arbitration communication authority,
The minimum slot number will be distributed to from control plate in the idle and minimum arbitration bus of circuit sequence number, and dispatch one of them
RS485 buses are docked from the RS485 circuits of control plate with the minimum slot number.
2. many board communication systems of employing RS485 agreements according to claim 1, it is characterised in that the communication is cut
Change matrix module to be additionally operable to after judging to communicate with the master control borad from control plate application described in only one of which, get described from control
Application information of the plate to the first arbitration bus, a RS485 buses are docked with the RS485 circuits from control plate.
3. many board communication systems of employing RS485 agreements according to claim 1, it is characterised in that the communication is cut
Change matrix module be additionally operable to judge the minimum slot number from control plate application less than arbitration communication authority after, confirmation have it is described from
Control plate application is communicated and is existed after idle RS485 buses with the master control borad, gets Shen by the arbitration bus
Please communicate from control plate slot number, carrying out screening and obtain minimum slot number from control from control plate slot number to the application communication
Plate.
4. many board communication systems of employing RS485 agreements according to claim 1, it is characterised in that the communication is cut
Matrix module is changed for CPLD devices.
5. many board communication systems of employing RS485 agreements according to claim 1, it is characterised in that the master control borad
Also it is connected by controlling bus with the communication switching matrix module.
6. many board communication systems of employing RS485 agreements according to claim 4, it is characterised in that the communication is cut
Change matrix module and be provided with difference and turn single-ended signal circuit.
7. many board communication systems of employing RS485 agreements according to claim 6, it is characterised in that the master control borad
It is connected by N+1 RS485 bus asynchronous communication with the communication switching matrix module；
It is connected by RS485 circuit asynchronous communications from control plate with the communication switching matrix module described in each.
8. many board means of communication of a kind of employing RS485 agreements, it is characterised in that include：
After judging to communicate from control plate application with the master control borad at least described in two, Shen is got by the arbitration bus
Please communicate from control plate slot number, carrying out screening and obtain minimum slot number from control from control plate slot number to the application communication
Plate；
After judging the minimum slot number from control plate application to arbitration communication authority, the free time will be in and circuit sequence number will be minimum
Arbitration bus distribute to the minimum slot number from control plate, and dispatch one of RS485 buses and the minimum slot number from
The RS485 circuits of control plate are docked.
9. many board means of communication of employing RS485 agreements according to claim 8, it is characterised in that also include：Sentencing
Described in disconnected only one of which from after control plate application with master control borad communication, get described from Shen of the control plate to the first arbitration bus
Please information, by a RS485 buses with it is described from control plate RS485 circuits docked.
10. many board means of communication of employing RS485 agreements according to claim 8, it is characterised in that also include：
Judge that the minimum slot number is communicated after authority from control plate application less than arbitration, confirmation has described from control plate application and the master control
Plate is communicated and is existed after idle RS485 buses, by the arbitration bus get application communication from control board slot position
Number, screening is carried out from control plate slot number to the application communication minimum slot number is obtained from control plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611198728.5A CN106598888B (en) | 2016-12-22 | 2016-12-22 | A kind of more board communication systems and method using RS485 agreement |
| PCT/CN2017/088988 WO2018113217A1 (en) | 2016-12-22 | 2017-06-19 | Multi-board communication system and method using rs485 protocol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611198728.5A CN106598888B (en) | 2016-12-22 | 2016-12-22 | A kind of more board communication systems and method using RS485 agreement |
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| Publication Number | Publication Date |
|---|---|
| CN106598888A true CN106598888A (en) | 2017-04-26 |
| CN106598888B CN106598888B (en) | 2019-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611198728.5A Expired - Fee Related CN106598888B (en) | 2016-12-22 | 2016-12-22 | A kind of more board communication systems and method using RS485 agreement |
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| CN (1) | CN106598888B (en) |
| WO (1) | WO2018113217A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107547281A (en) * | 2017-09-18 | 2018-01-05 | 通鼎互联信息股份有限公司 | A kind of main and standby competition method, apparatus and application apparatus |
| WO2018113217A1 (en) * | 2016-12-22 | 2018-06-28 | 威创集团股份有限公司 | Multi-board communication system and method using rs485 protocol |
| CN110908275A (en) * | 2019-11-24 | 2020-03-24 | 北京长峰科威光电技术有限公司 | Multi-circuit control method based on single communication interface |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114465842B (en) * | 2022-01-30 | 2024-02-13 | 合肥美的电冰箱有限公司 | Communication system, household appliance, remote upgrading system and communication method |
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| CN105259839A (en) * | 2015-11-02 | 2016-01-20 | 日立永济电气设备（西安）有限公司 | Multi-circuit board parallel communication system and method |
| CN105677608A (en) * | 2015-12-31 | 2016-06-15 | 浙江众合科技股份有限公司 | Multi-master RS485 bus arbitration method and system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018113217A1 (en) * | 2016-12-22 | 2018-06-28 | 威创集团股份有限公司 | Multi-board communication system and method using rs485 protocol |
| CN107547281A (en) * | 2017-09-18 | 2018-01-05 | 通鼎互联信息股份有限公司 | A kind of main and standby competition method, apparatus and application apparatus |
| WO2019052069A1 (en) * | 2017-09-18 | 2019-03-21 | 通鼎互联信息股份有限公司 | Master/standby contention method and device, and application equipment |
| CN110908275A (en) * | 2019-11-24 | 2020-03-24 | 北京长峰科威光电技术有限公司 | Multi-circuit control method based on single communication interface |
| CN110908275B (en) * | 2019-11-24 | 2023-05-05 | 北京长峰科威光电技术有限公司 | Multi-circuit control method based on single communication interface |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106598888B (en) | 2019-07-12 |
| WO2018113217A1 (en) | 2018-06-28 |
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