CN106330644A - Master-slave multi-computer communication system, master computer, slave computers and slave computer ID (identification) assigning method - Google Patents
Master-slave multi-computer communication system, master computer, slave computers and slave computer ID (identification) assigning method Download PDFInfo
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- CN106330644A CN106330644A CN201611052784.8A CN201611052784A CN106330644A CN 106330644 A CN106330644 A CN 106330644A CN 201611052784 A CN201611052784 A CN 201611052784A CN 106330644 A CN106330644 A CN 106330644A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
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- 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
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4027—Coupling between buses using bus bridges
- G06F13/4031—Coupling between buses using bus bridges with arbitration
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40019—Details regarding a bus master
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- Computer Networks & Wireless Communication (AREA)
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Information Transfer Between Computers (AREA)
- Computer And Data Communications (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a master-slave multi-computer communication system, a master computer, slave computers and a slave computer ID (identification) assigning method for assigning slave computer ID without increasing hardware cost. The method includes the steps: generating a broadcast command carrying a current value of a counter and transmitting the broadcast command to all the slave computers; judging whether ID unassigned slave computers are present in the system or not; updating the current value of the counter and generating and transmitting the broadcast command carrying the updated current value of the counter to all the slave computers when receiving data returned by a bus competition slave computer if the ID unassigned slave computers are present in the system; judging whether ID unassigned slave computers are present in the master-slave multi-computer communication system or not again until judging that ID is assigned for all the slave computers. The broadcast command is used for controlling the ID unassigned slave computers to participate in bus competition, and the bus competition slave computer is used for storing the current value of the counter carried by the broadcast command as a sole ID and stopping the data transmission function of the slave computer.
Description
Technical field
The present invention relates to communication technical field, more particularly, it relates to Subordinate communication system, main frame, from machine with
And from machine ID distribution method.
Background technology
Subordinate communication system is straight by a upper master computer (abbreviation main frame) being used as management and some
Connect the bottom participating in controlling detection and be articulated in same bus the communication network constituted, such as Fig. 1 from computer (being called for short from machine)
Shown in.The communication data sending permission of whole communication network, by host computer control, can only passively receive from machine, perform main frame and send
Order and according to the requirement return data of main frame.When main frame is to when carrying out point-to-point communication from machine, need to learn in advance this
From the ID of machine, it is achieved mailing address mates, so before this, need to distribute a unique ID for each from machine.
Conventional from machine ID distribution method be use the hardware circuits such as toggle switch to being respectively allocated from the ID of machine, but by
Additionally increase hardware circuit in needs, cause hardware cost to increase, and the most complicated from the most hardware circuit design of machine number.
Summary of the invention
In view of this, the invention provides Subordinate communication system, main frame, from machine and from machine ID distribution method,
To realize on the premise of not increasing hardware cost, complete to distribute from machine ID.
One, from machine ID distribution method, is applied to the main frame in Subordinate communication system, and described method includes:
Generate the broadcasting command carrying enumerator currency, and be sent to the institute in described Subordinate communication system
Have from machine；Wherein, described broadcasting command for control unallocated ID from machine participate in bus contention, by competition to bus from machine
Enumerator currency entrained by described broadcasting command is saved as originally from the unique ID of machine, and close this data transmission from machine
Function；
Judge in described Subordinate communication system whether to also have unallocated ID from machine；
If judge to obtain described Subordinate communication system also has unallocated ID from machine, then arrive receiving competition
Bus when the data of machine passback, update described enumerator currency, generate and to all send from machine carry renewal after
The described broadcasting command of enumerator currency；Afterwards, again judge whether described Subordinate communication system also has not
Distribution ID from machine, until judging to obtain all being allocated ID from machine.
Wherein, described judge in described Subordinate communication system whether to also have unallocated ID from machine, including:
Judge whether bus is in occupied state, if so, judge described Subordinate communication system also has not divide
Join ID from machine.
Wherein, described enumerator is capable of not repeat count for counting up device, down counter or other any one
Enumerator.
Wherein, when described enumerator is for counting up device, set the counting initial value of described enumerator as 1；
Described renewal described enumerator currency, including: described enumerator currency is added up 1.
A kind of from machine ID distribution method, be applied in Subordinate communication system from machine, described method includes:
Receive the broadcasting command carrying enumerator currency；
Judge whether this closes from the data sending function of machine；
If this is not turned off from the data sending function of machine, participate in bus contention, when this competes bus from machine by described
Enumerator currency saves as originally from the unique ID of machine, and closes this from the data sending function of machine.
A kind of main frame in Subordinate communication system, including processor；
Described processor carries the broadcasting command of enumerator currency for generating, and is sent to described master-slave mode multimachine
All from machine in communication system；Wherein, described broadcasting command for control unallocated ID from machine participate in bus contention, by competing
Strive saving as originally the enumerator currency entrained by described broadcasting command from the unique ID of machine from machine of bus, and close this
From the data sending function of machine；
Described processor be additionally operable to judge in described Subordinate communication system whether to also have unallocated ID from machine, if
Be, then receive competition to bus from the data of machine passback time, update described enumerator currency, generate and to all from
Machine sends the described broadcasting command of the enumerator currency after carrying renewal, the most again judges described Subordinate communication
Whether system also has unallocated ID from machine, until judging to obtain all to be allocated ID from machine.
Wherein, whether also have being adopted from machine of unallocated ID during described processor judges described Subordinate communication system
Criterion, including: judge whether bus is in occupied state, if so, judge in described Subordinate communication system also
Have unallocated ID from machine.
Wherein, described enumerator is capable of not repeat count for counting up device or down counter or other any one
Enumerator.
A kind of in Subordinate communication system from machine, including processor；
Described processor, for receiving the broadcasting command carrying enumerator currency, it is judged that this sends from the data of machine
Whether function closes, if being not turned off, then participates in bus contention, is protected by described enumerator currency when this competes bus from machine
Save as originally from the unique ID of machine, and close this from the data sending function of machine.
A kind of Subordinate communication system, including: any one main frame as disclosed above, and some such as above-mentioned public affairs
Open from machine.
From above-mentioned technical scheme it can be seen that the present invention completes to distribute from machine ID based on bus arbitration mechanism, concrete:
Main frame, to all broadcasting commands carrying enumerator currency from machine transmission, controls the competing from machine participation bus of unallocated ID
Strive, compete saving as originally the enumerator currency entrained by described broadcasting command from the unique ID of machine from chance of bus,
And no longer participate in consecutive Bus lines competition；Hereafter, main frame receive every time last competition to bus after the data of machine passback,
All send the described broadcasting command of the enumerator currency after carrying renewal, be all assigned to unique ID from machine until all.
Whole realized by software from machine ID assigning process, hardware cost will not be increased.
Accompanying drawing explanation
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
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is a kind of Subordinate communication system structure schematic diagram disclosed in prior art；
Fig. 2 be disclosed in the embodiment of the present invention a kind of be applied to main frame from machine ID distribution method flow chart；
Fig. 3 be disclosed in the embodiment of the present invention a kind of be applied to from machine from machine ID distribution method flow chart.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
See Fig. 2, the embodiment of the invention discloses a kind of from machine ID distribution method, be applied to Subordinate communication system
In main frame, with realize on the premise of not increasing hardware cost, complete from machine ID distribute, described method includes:
Step S01: generate and carry the broadcasting command of enumerator currency to all send from machine；Wherein, described extensively
Broadcast order for control unallocated ID from machine participate in bus contention, by competition described broadcasting command is taken from machine to bus
The enumerator currency of band saves as originally from the unique ID of machine, and closes this from the data sending function of machine.
Step S02: judge in described Subordinate communication system whether to also have unallocated ID from machine；When judging to obtain
In described Subordinate communication system also have unallocated ID when machine, enter step S03；Otherwise, this distributes from machine ID
Process terminates.
Step S03: judge whether the data from machine passback receiving competition to bus；Bus is arrived when receiving competition
When the data of machine passback, enter step S04；Otherwise, step S03 is returned.
Step S04: update described enumerator currency, generates and sends the enumerator after carrying renewal to all from machine
The described broadcasting command of currency；Afterwards, step S02 is returned.
For the technical scheme described in clearer description the present embodiment, below from analyzing Subordinate communication system
Bus arbitration mechanism is started with, and is described in detail the technical scheme described in the present embodiment.
Article one, when bus being mounted with multiple stage computer, bus arbitration mechanism allows any computer in bus all
Have an opportunity to take bus (i.e. obtain the control of bus and be sent out data), but synchronization can only have a computer competing
Strive the control of bus and be sent out data (i.e. competition is to bus).Subordinate communication system is for ensureing whole communication
The data sending permission of network by the host computer control in described multiple stage computer, give the trunk priority power of main frame higher than all from
Machine, respectively weighs equal from the trunk priority of machine.It is to say, when synchronization, to have a main frame and some to participate in bus from machine competing
When striving, necessarily bus competed by main frame；And do not participate in bus when synchronization has some to participate in bus contention, main frame from machine
During competition, the most always have one from machine by competition to bus.
Based on above-mentioned bus arbitration mechanism, the present embodiment arranges the main frame in Subordinate communication system in system start-up
After, generate and send from machine that to carry the broadcasting command of enumerator currency (Subordinate communication system, main to all
Machine is some or all control command from machine, referred to as broadcasting command in issuing a communication network).Wherein, described enumerator can
Being to count up device, it is also possible to be down counter, it is also possible to be other any one enumerators of being capable of not repeat count,
The counting initial value of described enumerator can the most arbitrarily be arranged, such as, described enumerator is chosen as counting up device, and
The counting initial value of device is counted up as 1 described in setting.
Each after machine receives the broadcasting command that main frame sends first, participate in bus contention, the (false from machine of bus is arrived in competition
Be set to A from machine) the enumerator currency that carries broadcasting command that main frame is sent first save as this from the unique ID of machine, and
Close this continuation that do not possesses from machine after the data sending function of machine, closedown data sending function and participate in the energy of bus contention
Power.
Remaining continues to participate in bus contention from machine；Meanwhile, main frame receives A after the data that machine returns, and updates institute
State the currency of enumerator, generate and send the broadcasting command of enumerator currency after carrying renewal, also assist in bus
Competition, owing to the trunk priority of main frame is weighed higher than all from machine, so main frame is necessarily won in bus contention, Ke Yicheng
Merit ground secondary sends broadcasting command.
Each after machine receives the broadcasting command that main frame secondary sends, except all from machine of A participate in bus contention from machine,
The enumerator currency carried from the broadcasting command that main frame secondary is sent by machine (being assumed to be B from machine) competing bus preserves
For this from the unique ID of machine, and close originally from the data sending function of machine, do not continue to participate in follow-up bus contention.
Except A, B from machine all from machine continue participate in bus contention；Meanwhile, main frame receives what B returned from machine
After data, the currency of refresh counter ..., circulate with this, be all assigned to unique ID from machine until all.
Wherein, unknown in the case of the total number of machine is how many in advance at main frame, main frame judges all the most all to divide from machine
The method being fitted on unique ID, may is that and judge whether bus is in occupied state, if so, judges described master-slave mode multimachine
In communication system also have unallocated ID from machine；If it is not, judge in described Subordinate communication system all from machine the most
Distribution ID.Make a concrete analysis of as follows:
During in bus, some or all computer of mounting participates in bus contention and transmission/reception data, bus
It is in occupied state；Not carrying out between bus contention and data communication period between each computer, bus is in idle condition.Based on
This, after main frame sends broadcasting command each time, if detecting, bus is in occupied state, then can conclude that to also have in system and do not divide
Join ID from machine, if detecting, bus is in idle condition, then can conclude that and all be allocated ID from machine.
Corresponding above-mentioned determination methods, when described enumerator is chosen as counting up device, and counts up the counting of device described in setting
When initial value is 1, counts up device currency and add up 1, then in main frame judgement if set to update every time for device currency will be counted up
Obtain all after machine is allocated ID, can directly be calculated from the total number of machine be n-1 (n is for counting up device currency).
In sum, the present embodiment based on bus arbitration mechanism complete from machine ID distribute, concrete: main frame to all from machine
Sending the broadcasting command carrying enumerator currency, control unallocated ID participates in bus contention from machine, and bus is arrived in competition
From chance the enumerator currency entrained by described broadcasting command saved as this from the unique ID of machine, and no longer participate in follow-up always
Line is competed；Hereafter, main frame receive every time last competition to bus after the data of machine passback, all send and carry renewal
After the described broadcasting command of enumerator currency, be all assigned to unique ID from machine until all.Whole distributed from machine ID
Journey is realized by software, will not increase hardware cost.
See Fig. 3, based on same inventive concept, the embodiment of the invention also discloses a kind of from machine ID distribution method, should
In Subordinate communication system from machine, described method includes:
Step S01: receive the broadcasting command carrying enumerator currency；
Step S02: judge whether this is turned off from the data sending function of machine；If this does not closes from the data sending function of machine
Close, enter step S03；Otherwise EP (end of program)；
Step S03: participate in bus contention, when this competes bus from machine described enumerator currency saved as this from
The unique ID of machine, and close this from the data sending function of machine.
The embodiment of the invention also discloses a kind of main frame in Subordinate communication system.The processor of this main frame
Carry the broadcasting command of enumerator currency for generating, and be sent in described Subordinate communication system all from
Machine；Wherein, described broadcasting command for control unallocated ID from machine participate in bus contention, by competition to bus from machine by institute
State the enumerator currency entrained by broadcasting command to save as originally from the unique ID of machine, and close this data transmission merit from machine
Energy；
The processor of this main frame be additionally operable to judge in described Subordinate communication system whether to also have unallocated ID from
Machine, the most then receive competition to bus from the data of machine passback time, update described enumerator currency, generate and to
All described broadcasting commands sending the enumerator currency after carrying renewal from machine, judge that described master-slave mode is many most again
Whether machine communication system also has unallocated ID from machine, until judging to obtain all to be allocated ID from machine.
Wherein, whether also have being adopted from machine of unallocated ID during described processor judges described Subordinate communication system
Criterion, including: judge whether bus is in occupied state, if so, judge in described Subordinate communication system also
Have unallocated ID from machine.
Wherein, described enumerator can be to count up device, it is also possible to is down counter.
The embodiment of the invention also discloses a kind of in Subordinate communication system from machine.Should be from the process of machine
Device, for receiving the broadcasting command carrying enumerator currency, it is judged that whether this closes from the data sending function of machine, if not
Close, then participate in bus contention, when this competes bus from machine, described enumerator currency is saved as this unique from machine
ID, and close this from the data sending function of machine.
The embodiment of the invention also discloses a kind of Subordinate communication system, including: any one master as disclosed above
Machine, and some as disclosed above from machine.
In sum, the present invention completes to distribute from machine ID based on bus arbitration mechanism, concrete: main frame is sent out from machine to all
Send the broadcasting command carrying enumerator currency, control unallocated ID from machine participate in bus contention, competition to bus from
Enumerator currency entrained by described broadcasting command is saved as originally from the unique ID of machine by chance, and no longer participates in consecutive Bus lines
Competition；Hereafter, main frame receive every time last competition to bus after the data of machine passback, all send after carrying renewal
The described broadcasting command of enumerator currency, be all assigned to unique ID from machine until all.Whole from machine ID assigning process
Realized by software, hardware cost will not be increased.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment, identical similar portion sees mutually.For main frame disclosed in embodiment,
For machine, owing to it corresponds to the method disclosed in Example, so describe is fairly simple, relevant part sees method portion
Defend oneself bright.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize in the case of without departing from the spirit or scope of the embodiment of the present invention in other embodiments.Therefore,
The embodiment of the present invention is not intended to be limited to the embodiments shown herein, and be to fit to principles disclosed herein and
The widest scope that features of novelty is consistent.
Claims (10)
1. one kind from machine ID distribution method, it is characterised in that be applied to the main frame in Subordinate communication system, described method
Including:
Generate and carry the broadcasting command of enumerator currency, and be sent in described Subordinate communication system all from
Machine；Wherein, described broadcasting command for control unallocated ID from machine participate in bus contention, by competition to bus from machine by institute
State the enumerator currency entrained by broadcasting command to save as originally from the unique ID of machine, and close this data transmission merit from machine
Energy；
Judge in described Subordinate communication system whether to also have unallocated ID from machine；
If judge to obtain described Subordinate communication system also has unallocated ID from machine, then receiving competition to bus
When the data of machine passback, update described enumerator currency, generate and also send the meter after carrying renewal to all from machine
The described broadcasting command of number device currency；Afterwards, again judge in described Subordinate communication system the most unallocated
ID from machine, until judging to obtain all being allocated ID from machine.
Method the most according to claim 1, it is characterised in that described whether judge in described Subordinate communication system
Also have unallocated ID from machine, including:
Judge whether bus is in occupied state, if so, judge described Subordinate communication system also has unallocated ID
From machine.
Method the most according to claim 1, it is characterised in that described enumerator for count up device, down counter or its
His any one is capable of the enumerator of not repeat count.
Method the most according to claim 3, it is characterised in that when described enumerator is for counting up device, set described meter
The counting initial value of number device is 1；
Described renewal described enumerator currency, including: described enumerator currency is added up 1.
5. one kind from machine ID distribution method, it is characterised in that be applied in Subordinate communication system from machine, described method
Including:
Receive the broadcasting command carrying enumerator currency；
Judge whether this closes from the data sending function of machine；
If this is not turned off from the data sending function of machine, participate in bus contention, when this competes bus from machine by described counting
Device currency saves as originally from the unique ID of machine, and closes this from the data sending function of machine.
6. the main frame in Subordinate communication system, it is characterised in that include processor；
Described processor carries the broadcasting command of enumerator currency for generating, and is sent to described Subordinate communication
All from machine in system；Wherein, described broadcasting command for control unallocated ID from machine participate in bus contention, by competition to
The enumerator currency entrained by described broadcasting command being saved as originally from the unique ID of machine from machine of bus, and close this from machine
Data sending function；
Described processor be additionally operable to judge in described Subordinate communication system whether to also have unallocated ID from machine, if so,
Then receive competition to bus from the data of machine passback time, update described enumerator currency, generate and to all from machine
Send the described broadcasting command of the enumerator currency after carrying renewal, the most again judge described Subordinate communication system
Whether system also has unallocated ID from machine, until judging to obtain all to be allocated ID from machine.
Main frame the most according to claim 6, it is characterised in that described processor judges described Subordinate communication system
In whether also have the criterion used from machine of unallocated ID, including: judge whether bus is in occupied state, if so, sentence
Fixed described Subordinate communication system also has unallocated ID from machine.
Main frame the most according to claim 6, it is characterised in that described enumerator for count up device or down counter or its
His any one is capable of the enumerator of not repeat count.
9. one kind in the Subordinate communication system from machine, it is characterised in that include processor；
Described processor, for receiving the broadcasting command carrying enumerator currency, it is judged that this is from the data sending function of machine
Whether closing, if being not turned off, then participating in bus contention, when this competes bus from machine, described enumerator currency is saved as
This is from the unique ID of machine, and closes this from the data sending function of machine.
10. a Subordinate communication system, it is characterised in that including: the master as according to any one of claim 6-8
Machine, and some as claimed in claim 9 from machine.
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| CN110247994A (en) * | 2019-05-05 | 2019-09-17 | 江苏苏美达机电有限公司 | A kind of more lithium battery group dynamic ID assignment protocol systems based on RS-485 communication protocol |
| CN110266066A (en) * | 2019-05-05 | 2019-09-20 | 江苏苏美达机电有限公司 | The battery charge controller and charge control method of more lithium battery group parallel connections |
| CN110739709A (en) * | 2019-11-06 | 2020-01-31 | 湖南微网能源技术有限公司 | multi-machine control synchronization method |
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| CN107273158A (en) * | 2017-06-08 | 2017-10-20 | 广东美的暖通设备有限公司 | Programme upgrade method and device, main frame, slave and multi-online air-conditioning system |
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| CN110247994A (en) * | 2019-05-05 | 2019-09-17 | 江苏苏美达机电有限公司 | A kind of more lithium battery group dynamic ID assignment protocol systems based on RS-485 communication protocol |
| CN110266066A (en) * | 2019-05-05 | 2019-09-20 | 江苏苏美达机电有限公司 | The battery charge controller and charge control method of more lithium battery group parallel connections |
| CN110739709A (en) * | 2019-11-06 | 2020-01-31 | 湖南微网能源技术有限公司 | multi-machine control synchronization method |
| CN111384455A (en) * | 2020-04-14 | 2020-07-07 | 杭州协能科技股份有限公司 | BMS multi-machine parallel implementation system |
| CN111384455B (en) * | 2020-04-14 | 2022-04-26 | 杭州协能科技股份有限公司 | BMS multi-machine parallel implementation system |
| CN112052214A (en) * | 2020-08-25 | 2020-12-08 | 惠州拓邦电气技术有限公司 | Communication method and device for multi-machine number competition |
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