CN104917696B - A kind of period for low-frequency serial bus and aperiodic mix communication means and system - Google Patents
A kind of period for low-frequency serial bus and aperiodic mix communication means and system Download PDFInfo
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- CN104917696B CN104917696B CN201510309016.5A CN201510309016A CN104917696B CN 104917696 B CN104917696 B CN 104917696B CN 201510309016 A CN201510309016 A CN 201510309016A CN 104917696 B CN104917696 B CN 104917696B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
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Abstract
The present invention relates to packet sending and receiving technical field, disclose a kind of period for low-frequency serial bus and it is aperiodic mix communication means, this method includes：Client serially-transmitted data message, wherein periodically packet each period sends once, and aperiodicity message is sent in the event of an emergency；Analysis sends the data message at this time, if can clash, if meeting, the data message is temporarily stored in caching Buffer；When server end receives transmission order, flag bit Flag is set to 0, after receiving the data message, sets 1；Judge sub- type of message according to Resp values, if the periodically packet, then update the data, if the aperiodicity message, then RespBuffer is written.The present invention serially receives and dispatches the periodically packet and the aperiodicity message, prevents the two from clashing, and quickly carry out respective handling to the two by the way that the Buffer and Flag is arranged.
Description
Technical field
The present invention relates to packet sending and receiving technical field more particularly to a kind of periods for low-frequency serial bus and aperiodic
Mix communication means and system.
Background technology
Client data, which needs to be uploaded to server end, to be updated, and data upload can pass through serial and concurrent two kinds of sides
Formula is completed, and under normal circumstances, to avoid the wasting of resources, when that frequently need not carry out data upload, mostly uses serial side greatly
Formula is completed data and is uploaded.Serial mode transmission data is since sending port is single, more to the data-message transmission of periodicity sending
Add conveniently, but data collision is easily caused for paroxysmal data message, leads to mistake.
Currently, the period and it is aperiodic mix communication transmitting data, for solve the problems, such as serially-transmitted data conflict, generally exist
Serial port goes out one clock of setting, for providing the time of simultaneously every part of data-message transmission of timing, but the time being specified that
It is usually equally spaced, in the data that no needs upload, the waste of resource can be caused, and when serial data is more, mistake
Big time interval can cause transmission congestion, and promptness is poor, if predetermined time interval is different, need multiple clocks, setting
Complexity, resource cost are excessive.
Invention content
The technical problem to be solved by the invention is to provide a kind of period for low-frequency serial bus and aperiodic mix
Communication means and system, with solve periodically packet and when aperiodicity message mixes transmitting-receiving caused by data collision and resource wave
The problem taken etc..
Technical solution is to provide a kind of week for low-frequency serial bus used by the present invention solves above-mentioned technical problem
Phase and it is aperiodic mix communication means, the method comprising the steps of：
S1, client serially-transmitted data message, wherein periodically packet each period sends primary, aperiodicity report
Text is sent in the event of an emergency；
S2, judgement send whether the data message can clash at this time, if meeting, the data message are put into slow
It deposits in Buffer and keeps in；
If S3, will not, the data message will be sent；
Flag bit Flag is set as 0 by the transmission order of client described in S4, received server-side；
S5, the data message is received, the Flag is set as 1, and the RespBuffer that empties the cache；
S6, the parsing data message verify it if the data message is correct, if the data message
It is wrong, then the type of error is updated into ErrCode；
S7, judge sub- type of message, if the periodically packet, then update server data, if described aperiodic
Property message, then be written in the RespBuffer, and flag bit bRespReceived is set as 1.
Preferably, in step S2, when the universal serial bus free time, judge whether there are temporary data in the caching Buffer
Message if so, then sending the data message, and empties the caching Buffer.
Preferably, in step S4, when the flag bit Flag is set as 0, start timing, if timing is more than the time of setting
Threshold value T does not receive the data message or calibration mistake occurs, be then time-out error, stops receiving, and described in update yet
ErrCode。
Preferably, in step S7, the server end judges sub- type of message according to Resp values, if Resp=0X0F,
For the periodically packet, if Resp ≠ 0X0F, for aperiodicity message.
Preferably, when the flag bit bRespReceived values of the RespBuffer are 1, the server end need to be to institute
The aperiodicity message stated in RespBuffer is replied.
On the other hand, the present invention provide a kind of period for low-frequency serial bus and it is aperiodic mix communication system,
It is characterized in that, the system comprises client and server ends, wherein
The client is used for serial sending cycle message and aperiodicity message, and the client includes the first judgement
Unit, caching Buffer units, transmission unit and detection unit；
The server end carries out respective handling for receiving the periodically packet and aperiodicity message to it,
The server end includes receiving unit, resolution unit, error handling unit, calibration unit, second judgment unit, data update
Unit and caching RespBuffer units.
Preferably, each unit in the client：
First judging unit sends whether the periodically packet or aperiodicity message can be sent out at this time for judging
Raw conflict, if meeting, is kept in the caching Buffer units, if will not, send it to the transmission unit；
The caching Buffer units, for keeping in the periodically packet or non-week that first judging unit is sent
Phase message；
The transmission unit, for sending the periodically packet or aperiodic message；
Whether the detection unit has in the universal serial bus free time, detecting to keep in the caching Buffer units
The periodically packet or aperiodic message if so, then sending, and empty the caching Buffer units.
Preferably, each unit in the server end：
The receiving unit, for receiving transmission order and the periodically packet that the client is sent out or aperiodic
Flag bit Flag is set as 0, when the message finishes receiving, by the mark by message when receiving the transmission order
Will position Flag is set as 1；
The resolution unit, for parsing the periodically packet or aperiodic message, if the message is correct, by it
It is sent to the calibration unit, if the message is wrong, by type of error update to error handling unit；
The error handling unit receives the mistake that the periodically packet or aperiodic message generate in the process for recording
Accidentally；
The calibration unit, for periodically packet or aperiodic message described in calibration；
The second judgment unit, the type for judging sub- message are then sent to described if the periodically packet
Data updating unit is then sent to the caching RespBuffer units if the aperiodicity message；
The data updating unit, the data for updating the server end according to the periodically packet；
The caching RespBuffer units, for caching the aperiodicity message.
Preferably, the receiving unit further includes timing unit, when the flag bit Flag is 0, starts timing, if super
It crosses time threshold T and does not receive the message or the message calibration mistake yet, be then time-out error, stop receiving, and by institute
It states time-out error and is sent to the error handling unit and be updated；When the Flag is 1, the caching is emptied
RespBuffer units.
Preferably, the second judgment unit judges the type of sub- message according to Resp values, if Resp=0X0F, for institute
State periodically packet；If Resp ≠ 0X0F, for aperiodicity message, the caching RespBuffer units are written into, and
Flag bit bRespReced in the caching RespBuffer units is set as 1.
Description of the drawings
Fig. 1 is the flow chart of client sending cycle message in a preferred embodiment of the present invention；
Fig. 2 is the flow chart that client sends aperiodicity message in a preferred embodiment of the present invention；
Fig. 3 is the flow chart of received server-side data message in a preferred embodiment of the present invention；
Fig. 4 is the flow chart that server end judges data message type in a preferred embodiment of the present invention；
Fig. 5 is period in a preferred embodiment of the invention for low-frequency serial bus and aperiodic mixes communication system
Structure chart.
Specific implementation mode
The following examples are only intended to illustrate the technical solution of the present invention more clearly, and cannot limit the present invention with this
Protection domain.Specification subsequent descriptions are to implement the better embodiment of the present invention, and so the description is to illustrate the present invention
Rule for the purpose of, be not limited to the scope of the present invention.Protection scope of the present invention is when regarding appended claims institute
Subject to defender.
The present invention is described in further details in the following with reference to the drawings and specific embodiments.
As depicted in figs. 1 and 2, it is a preferred embodiment of the present invention, discloses period of low-frequency serial bus and non-
Period mixes communication means, wherein the method that Fig. 1 discloses periodically packet transmission, the method comprising the steps of：
S101, when the serial sending cycle message of client, judge whether universal serial bus idle；
If S102, having the aperiodicity message sent, periodically packet is put into caching Buffer and is kept in；
If S103, free time, sending；
S104, it is sent completely, whether judge to cache to keep in Buffer has aperiodicity message；
S105, if so, then sending the message in caching Buffer, and the Buffer that empties the cache.
Further, the method that Fig. 2 discloses the transmission of aperiodicity message, the method comprising the steps of：
S201, when client serially sends aperiodicity message, judge whether universal serial bus idle；
If S202, having the periodically packet sent, aperiodicity message is put into caching Buffer and is kept in；
If S203, free time, sending；
S204, it is sent completely, whether judge to cache to keep in Buffer has periodically packet；
S205, if so, then sending the message in caching Buffer, and the Buffer that empties the cache.
In the present embodiment, data message is divided into periodically packet and aperiodicity message, and wherein periodically packet passes through meter
When be accumulated to cycle time and start to send, aperiodicity message starts to send when in a burst breaking, in sending cycle message,
If there is aperiodicity message to occupy universal serial bus, to prevent to conflict, periodically packet is temporarily stored in caching Buffer,
After aperiodicity message is sent completely, the message cached in Buffer is sent out, vice versa, in this way, both having solved serial
Send datagram the conflict being likely to result in, meanwhile, and because the time to send datagram every time need not be divided, it can
Immediately temporary message is sent, solves the problems such as wasting of resources caused by send message in time.
As shown in figure 3, the method for disclosing received server-side data message, the method comprising the steps of：
Flag bit Flag is set as 0, and receives message by the transmission order of S301, received server-side client；
S302, flag bit Flag are denoted as 0, start timing, judge whether the timing cumulative time is more than the time threshold being arranged；
It is finished receiving in S303, time threshold, Flag values is set as 1, and the RespBuffer that empties the cache；
It is not finished receiving in S304, time thresholding, as time-out error, in update to ErrCode；
S305, analytic message, and judge whether message is correct；
S306, message error, then will be in mistake update to ErrCode.
In the present embodiment, control whether confirmation message finishes receiving by flag bit Flag, if finishing receiving, Flag by
0 becomes 1, if message does not receive or receive mistake, corresponding mistake is updated into ErrCode, can ensure server
It is all correct available to terminate the message that receives, and docks the mistake of time receiving message and type of error and have corresponding note
It carries, reversibility is strong.
As shown in figure 4, the method for disclosing the message that server-side processes receive, the method comprising the steps of：
S301, calibration message；
S302, judge that sub- type of message, Resp=0X0F, sub- message are period temper messages according to Resp values in message,
Resp ≠ 0X0F, aperiodicity message when sub- message；
If S303, message are periodically packets, server data is updated according to message；
If S304, message are non-periodically packets, RespBuffer is written into message, by flag bit
BRespReceived is set as 1.
In the present embodiment, when emergency situations occur, client sends aperiodicity message, and server end is written into
In RespBuffer, and flag bit bRespReceived is set as 1, the response of waiting for server end；Periodically packet is regular
Data upload, and server end only needs to carry out corresponding data update, is not necessarily to response, simply distinguishes different types of datagram
Text makes respective handling to different messages, accelerates message processing speed, improve efficiency, and enables the server to for corresponding
Command response message carries out response, it is not necessary to examine one by one, reduce the wasting of resources.
It will appreciated by the skilled person that implement the method for the above embodiments be can be with
Relevant hardware is instructed to complete by program, the program can be stored in computer read/write memory medium, should
Program when being executed, includes each step of above-described embodiment method, and the storage medium can be：ROM/RAM, magnetic disc,
CD, storage card etc..Therefore, relevant technical staff in the field will be understood that corresponding with the method for the present invention, and the present invention is also
Simultaneously including a kind of low-frequency serial bus period and it is aperiodic mix communication system, referring to Fig. 4, with above method step 1 one
Accordingly, which includes client and server end, wherein
Client includes the first judging unit, caching Buffer units, transmission unit and detection unit；
Server end includes receiving unit, resolution unit, error handling unit, calibration unit, second judgment unit, data
Updating unit and caching RespBuffer units.
In the present embodiment, client sends message by serial mode to server end, and client judges single by first
Member, caching Buffer units, transmission unit and detection unit orderly send message, avoid asking for serial line interface message collisions
Topic, server end receive the message that client is sent by receiving unit, resolution unit, error handling unit, it is ensured that message
Correctness is completed by second judgment unit, data updating unit and caching RespBuffer units to different type message
Processing improves the efficiency of server-side processes message.
Further, each unit in client：
First judging unit, for judging whether there is the message sent, if so, then keeping in message to caching
Message is sent to transmission unit by Buffer units if not having；
Buffer units are cached, the message for storing the transmission of the first judging unit；
Transmission unit, for sending message；
Whether detection unit keeps in after being sent completely in the message sent in detection caching Buffer units
There is message, if so, message is then sent, and the Buffer units that empty the cache.
In the present embodiment, client judges whether to keep in the message for needing to send by the first judging unit, to be sent
When unit free, caching message is determined by detection unit, transmission unit is sent, and when ensure that transmission unit is busy, is needed
The message of transmission is lined up, and conflict and congestion will not be caused, and when the transmission unit free time, and it is capable of the report of dispatcher queue in time
Text improves transmitting efficiency.
Further, each unit in server end：
Receiving unit, when receiving transmission order, will indicate for receiving the transmission order and message that client is sent out
Position Flag is set as 0, and when message finishes receiving, flag bit Flag is set as 1；
Message is sent to calibration unit by resolution unit for analytic message if message is correct, if message is wrong,
Then type of error is updated to error handling unit；
Error handling unit, for recording the mistake for receiving message and generating in the process；
Calibration unit is used for calibration message；
Second judgment unit, the type for judging sub- message are then sent to data update list if periodically packet
Member is then sent to caching RespBuffer units if command response message；
Data updating unit, the data for updating server end according to periodically packet；
RespBuffer units are cached, for caching aperiodicity message.
Further, receiving unit further includes timing unit, when flag bit Flag is 0, starts timing, if being more than the time
Threshold value T does not receive message or message calibration mistake yet, then is time-out error, stops receiving message, and time-out error is sent
It is updated to error handling unit；When Flag is 1, empty the cache RespBuffer units.
Further, second judgment unit judges the type of message according to the Resp values of message, if Resp values are 0X0F,
Then message is periodically packet；If Resp values are not 0X0F, message is aperiodicity message, is written into caching
RespBuffer units, and the flag bit bRespReced cached in RespBuffer units is set as 1.
In the present embodiment, server end judges whether receiving unit is completely received message by flag bit Flag, with true
The correctness of message is protected, meanwhile, the mistake and error condition of error handling unit misregistration message so that the reception of message has
There is trackability；In addition, server end judges type of message by second judgment unit, and pass through data updating unit
Different processing is carried out to periodically packet and aperiodicity message respectively with caching RespBuffer units so that message is more easy to
In classification, treatment effeciency higher, and periodic data is no longer needed especially to handle, saves resource.
Compared with prior art, the present invention provides a kind of period of low-frequency serial bus and aperiodic mix communication means
And system, the transmission by using buffer control client to message, prevent serial mode from mixing sending cycle message and non-
Conflict is generated when periodically packet；The integrality that message is controlled and received by flag bit, parses message, ensures message
Correctness and availability；In addition, by judging type of message, message is subjected to classification processing, saves processing time, improves effect
Rate, meanwhile, prevent the waste of resource.
It is worth noting that, the foregoing is merely presently preferred embodiments of the present invention, the patent of the present invention is not thereby limited
Protection domain, the present invention can also carry out the construction of above-mentioned various parts the improvement of material and structure, or use skill
Art equivalent is replaced.Therefore it is all with the present invention specification and diagramatic content made by equivalent structure variation, or directly or
Apply to other correlative technology fields indirectly to be similarly all contained in the range of of the invention cover.
Claims (10)
1. a kind of period for low-frequency serial bus and aperiodic mixing communication means, which is characterized in that the method includes
Step：
S1, client serially-transmitted data message, wherein periodically packet each period sends once, and aperiodicity message exists
Occur to send when emergency situations；
S2, judgement send whether the data message can clash at this time, if meeting, the data message is put into caching
It is kept in Buffer；
If S3, will not, the data message will be sent；
Flag bit Flag is set as 0 by the transmission order of client described in S4, received server-side；
S5, the data message is received, the Flag is set as 1, and the RespBuffer that empties the cache；
S6, the parsing data message verify it if the data message is correct, if the data message is wrong
Accidentally, then the type of error is updated into ErrCode；
S7, judge sub- type of message, if the periodically packet, then update server data, if the aperiodicity report
Text is then written in the RespBuffer, and flag bit bRespReceived is set as 1.
2. the method as described in claim 1, which is characterized in that in step S2, when the universal serial bus free time, judge the caching
Whether there is temporary data message in Buffer, if so, then sending the data message, and empties the caching Buffer.
3. the method as described in claim 1, which is characterized in that in step S4, when the flag bit Flag is set as 0, start
Timing does not receive the data message or calibration mistake occurs, be then time out error yet if timing is more than the time threshold T of setting
Accidentally, stop receiving, and update the ErrCode.
4. the method as described in claim 1, which is characterized in that in step S7, the server end judges son according to Resp values
Type of message, if Resp=0X0F, for the periodically packet, if Resp ≠ 0X0F, for aperiodicity message.
5. the method as described in claim 1, which is characterized in that the flag bit bRespReceived values of the RespBuffer
When being 1, the server end need to reply the aperiodicity message in the RespBuffer.
6. a kind of period for low-frequency serial bus and aperiodic mixing communication system, which is characterized in that the system comprises
Client and server end, wherein
The client is used for serial sending cycle message and aperiodicity message, and the client includes that the first judgement is single
Member, caching Buffer units, transmission unit and detection unit；
The server end carries out respective handling for receiving the periodically packet and aperiodicity message to it, described
Server end includes receiving unit, resolution unit, error handling unit, calibration unit, second judgment unit, data updating unit
With caching RespBuffer units；
First judging unit sends whether the periodically packet or aperiodicity message can rush at this time for judging
It is prominent, if meeting, kept in the caching Buffer units, if will not, send it to the transmission unit.
7. system as claimed in claim 6, which is characterized in that each unit in the client：
The caching Buffer units, for keeping in the periodically packet or aperiodic report that first judging unit is sent
Text；
The transmission unit, for sending the periodically packet or aperiodic message；
Whether the detection unit was used in the universal serial bus free time, kept in the detection caching Buffer units described in having
Periodically packet or aperiodic message if so, then sending, and empty the caching Buffer units.
8. system as claimed in claim 6, which is characterized in that each unit in the server end：
The receiving unit, for receiving the transmission order and the periodically packet or aperiodic report that the client is sent out
Flag bit Flag is set as 0, when the message finishes receiving, by the mark by text when receiving the transmission order
Position Flag is set as 1；
The resolution unit is sent to for parsing the periodically packet or aperiodic message if the message is correct
To the calibration unit, if the message is wrong, by type of error update to error handling unit；
The error handling unit receives the mistake that the periodically packet or aperiodic message generate in the process for recording；
The calibration unit, for periodically packet or aperiodic message described in calibration；
The second judgment unit, the type for judging sub- message are then sent to the data if the periodically packet
Updating unit is then sent to the caching RespBuffer units if the aperiodicity message；
The data updating unit, the data for updating the server end according to the periodically packet；
The caching RespBuffer units, for caching the aperiodicity message.
9. system as claimed in claim 8, which is characterized in that the receiving unit further includes timing unit, when the mark
When position Flag is 0, start timing, if being more than that time threshold T does not receive the message or the message calibration mistake yet, for
Time-out error stops receiving, and the time-out error is sent to the error handling unit and is updated；When the Flag is
When 1, the caching RespBuffer units are emptied.
10. system as claimed in claim 9, which is characterized in that the second judgment unit judges sub- message according to Resp values
Type, if Resp=0X0F, for the periodically packet；If Resp ≠ 0X0F, for aperiodicity message, it is written into
The caching RespBuffer units, and the flag bit bRespReced in the caching RespBuffer units is set as 1.
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| CN109617825B (en) * | 2018-11-30 | 2022-03-25 | 京信网络系统股份有限公司 | Message processing device, method and communication system |
| CN112764407B (en) * | 2021-04-09 | 2021-07-02 | 浙江国利信安科技有限公司 | Distributed control non-periodic communication method |
| CN113256833A (en) * | 2021-05-12 | 2021-08-13 | 安徽巨一科技股份有限公司 | PLC-based line body process duration analysis method and application thereof |
| CN113741390B (en) * | 2021-08-30 | 2023-10-13 | 重庆长安汽车股份有限公司 | Method for FBL (flash memory controller) to write vehicle controller based on UDS (Universal diagnostic System) diagnostic service |
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