CN109120735A - CAN bus based node message ID distribution method, device and equipment - Google Patents
CAN bus based node message ID distribution method, device and equipment Download PDFInfo
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- CN109120735A CN109120735A CN201810884162.4A CN201810884162A CN109120735A CN 109120735 A CN109120735 A CN 109120735A CN 201810884162 A CN201810884162 A CN 201810884162A CN 109120735 A CN109120735 A CN 109120735A
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- message
- bus
- node
- intrinsic
- special packet
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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]
-
- 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
-
- 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
- H04L61/30—Managing network names, e.g. use of aliases or nicknames
- H04L61/3015—Name registration, generation or assignment
- H04L61/3025—Domain name generation or assignment
-
- 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
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
Abstract
The invention discloses a kind of CAN bus based node message ID distribution methods, comprising: if not stored have special packet ID, sends the assignment request information of special packet ID to default node using intrinsic message ID by CAN bus；The special packet ID that default node returns is received and stored, and carries out CAN bus communication using special packet ID；Each node carries out the secondary distribution of special packet ID using pre-assigned intrinsic message ID in the present invention, not only facilitates extension, but also be adapted to specific CAN bus topological classification；And by the setting of reliable and stable intrinsic message ID, bus error when caused CAN bus communicates can be lost or surprisingly rewritten to avoid special packet ID, improves the reliability of CAN bus communication, the user experience is improved.In addition, the invention also discloses a kind of CAN bus based node message ID distributor and equipment, equally there is above-mentioned beneficial effect.
Description
Technical field
The present invention relates to communication technique field, in particular to a kind of CAN bus based node message ID distribution method, dress
It sets and equipment.
Background technique
In sewing industry, after cutting is cut cloth, useful cut-parts and waste material are separated, then
Useful cut-parts are transported to each sewing station according to classification such as cut-parts shape, numbers.And conveying need to be used by realizing this technique
Platform.Because delivery platform is combined in the form of unit (node), it is big to be related to quantity of units, for convenience of being routed and control, often uses CAN
Bus carries out networking, based on ring topology, needs to be allocated the message ID of each unit in CAN bus communication.
In the prior art, to the method for salary distribution of the message ID of node each in CAN bus, often using will be in CAN bus
Node individually successively energization carry in CAN bus, then to preset message ID distribution node request assignment message ID.?
After getting newly assigned message ID, state instruction is carried out, then successively carries out the powering on of next node, carry, distribution, state
The operation such as instruction.The above-mentioned method of salary distribution needs successively to power on node distribution, and reallocates after cannot all powering on, and is unfavorable for expanding
Exhibition；And because the message ID of all nodes is random or uncontrollable, once the message ID distributed loses, then message ID
0 or other random numbers may be reverted to, when communication will will cause bus error, reduce the reliability of CAN bus communication, unfavorable
In user experience.Therefore, how a kind of message ID distribution method of node for being easy to extend is provided, it is logical to improve CAN bus
The reliability of news promotes user experience, is urgent problem now.
Summary of the invention
The object of the present invention is to provide a kind of CAN bus based node message ID distribution method, device and equipment, with benefit
With pre-assigned intrinsic message ID, the reliability of CAN bus communication is improved, facilitates extension, the user experience is improved.
In order to solve the above technical problems, the present invention provides a kind of CAN bus based node message ID distribution method, packet
It includes:
If not stored have special packet ID, the spy is sent to default node using intrinsic message ID by CAN bus
Determine the assignment request information of message ID；
The special packet ID that the default node returns is received and stored, and is carried out using the special packet ID
CAN bus communication.
Optionally, point for sending the special packet ID to default node using intrinsic message ID by CAN bus
Before solicited message, further includes:
According to the numerical value in ROM Space at preset address, the intrinsic message ID is obtained.
Optionally, the numerical value of the preset address according to ROM Space obtains the intrinsic message ID, comprising:
The corresponding ROM image file of the numerical value is read, the intrinsic message ID is obtained.
Optionally, described to read the corresponding ROM image file of the numerical value, obtain the intrinsic message ID, comprising:
The filename of the ROM image file is read, the intrinsic message ID is obtained；Wherein, include in the filename
The intrinsic message ID.
Optionally, the intrinsic message ID is in the first preset range, the special packet ID in the second preset range,
And intersection is not present in first preset range and second preset range.
The present invention also provides a kind of CAN bus based node message ID distributors, comprising:
Sending module utilizes intrinsic message ID to default section if having special packet ID for not stored by CAN bus
Point sends the assignment request information of the special packet ID；
Receiving module, the special packet ID returned for receiving and storing the default node, and utilize the spy
Determine message ID and carries out CAN bus communication.
Optionally, the device further include:
Module is obtained, for obtaining the intrinsic message ID according to the numerical value in ROM Space at preset address.
Optionally, the acquisition module, comprising:
Reading submodule obtains the intrinsic message ID for reading the corresponding ROM image file of the numerical value.
Optionally, the reading submodule, comprising:
Reading unit obtains the intrinsic message ID for reading the filename of the ROM image file；Wherein, described
It include the intrinsic message ID in filename.
In addition, the present invention also provides a kind of CAN bus based node message ID distributing equipments, comprising:
Memory, for storing computer program；
Processor realizes CAN bus based section as described in any one of the above embodiments when for executing the computer program
The step of point message ID distribution method.
A kind of CAN bus based node message ID distribution method provided by the present invention, comprising: if it is not stored have it is specific
Message ID then sends the assignment request information of special packet ID by CAN bus using intrinsic message ID to default node；It receives
And the special packet ID that default node returns is stored, and carry out CAN bus communication using special packet ID；
As it can be seen that each node carries out the secondary distribution of special packet ID using pre-assigned intrinsic message ID in the present invention,
Not only facilitate extension, but also is adapted to specific CAN bus topological classification；And pass through setting for reliable and stable intrinsic message ID
It sets, the bus error when CAN bus caused by can losing to avoid special packet ID or surprisingly rewriting communicates improves CAN
The reliability of bus communication, the user experience is improved.In addition, the present invention also provides a kind of CAN bus based node messages
ID distributor and equipment equally have above-mentioned beneficial effect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow chart of CAN bus based node message ID distribution method provided by the embodiment of the present invention；
Fig. 2 is a kind of image text of CAN bus based node message ID distribution method provided by the embodiment of the present invention
The display diagram of part；
Fig. 3 is a kind of structure chart of CAN bus based node message ID distributor provided by the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of distribution side CAN bus based node message ID provided by the embodiment of the present invention
The flow chart of method.This method may include:
Step 101: if not stored have special packet ID, being sent out using intrinsic message ID to default node by CAN bus
Send the assignment request information of special packet ID.
It is understood that the present embodiment is any one non-default node (special packet to be connected in CAN bus
ID distribution node) node special packet ID acquisition process for the displaying that carries out, i.e., each of connected in CAN bus non-
The node of default node can be using the special packet ID for obtaining default node distribution with method provided by the present embodiment.
Wherein, this step in unassigned special packet ID or can divide for such as single-chip microcontroller processor in each node
When the special packet ID matched loses (such as storage failure or being accidentally erased), CAN bus is carried out using the intrinsic message ID of itself
Communication, to obtain the special packet ID of the default node distribution in CAN bus.Specifically, the intrinsic message ID in this step
The message ID of CAN bus communication can be carried out for pre-set corresponding one of each node.In this step
Special packet ID can be that corresponding one that the default node in CAN bus is each node distribution is used to carry out CAN
The message ID of bus communication.Wherein, the respective intrinsic message ID of each node is all different, and presets node as the distribution of each node
Special packet ID be all different, and be not present identical intrinsic message ID and special packet ID.For intrinsic message ID and
The concrete type of special packet ID, i.e., the type of the message ID in CAN bus can be by designer according to usage scenario and use
Family demand self-setting can be such as the standard class message ID formed by 11, such as account for 21~31 in table 1；Or
The extension class message ID formed by 29 accounts for 1~18 in table 1 and standard 11；Wherein, no matter standard class or extension class
In, remaining 3 are other purposes positions as defined in agreement.The present embodiment does not do any restrictions to this.
Table ID tables of 1 message
Specifically, for the specific acquisition modes of the intrinsic message ID in this step, it can be by designer according to practical
Scene and user demand self-setting can be such as configured, as long as each section according to the storage mode of intrinsic message ID correspondence
The available corresponding intrinsic message ID of processor of point, the present embodiment do not do any restrictions to this.
Further, in order to guarantee each node intrinsic message ID it is reliable and stable, prevent from accidentally writing or accidentally wipe, inherently
Message ID can store on the ROM (Read-Only Memory, read-only memory) on node with certain write-protect.?
To utilize corresponding compiler, a normal integer variable is defined in ROM fixing address, for storing intrinsic message ID.Such as exist
Under ARMCC compiler, code " const unsigned int dwCanID__attribute__ ((at can be passed through
(0x000023F0)))=(0x00000007) ", code " const unsigned can be passed through under ICC_ARM compiler
Int dwCanID@0x000023F0=(0x00000007) ", in the position of ROM fixing address 0x000023F0, storage is
The numerical value (intrinsic message ID) of 0x00000007, the ROM image file Object.bin of generation are as shown in Figure 2；It can also will be as
The ROM image file of Fig. 2 loads, while transferring message ID list, to the value of 0x000023F0 at ROM image file corresponding address
It is changed by message ID list, store again and corresponding intrinsic message ID is added on filename, that is, generate intrinsic report
The ROM image file of literary ID, circulation carry out, ROM image listed files collection, ROM corresponding to message ID list can be obtained and reflect
As file be cured in the ROM Space of processor can be carried out directly as intrinsic message ID using.
For example, the ROM image generated can have with file:
Object_0x00010001.bin
Object_0x00010002.bin
……
Object_0x000101FF.bin
Corresponding, processor can obtain intrinsic message ID according to the numerical value of the preset address of ROM Space.For ROM sky
Between preset address and preset address in numerical value specific setting, can be by designer according to practical scene and user demand
Self-setting, the numerical value for the 0x00000007 that such as above-mentioned position in ROM fixing address 0x000023F0 is stored are intrinsic message
When ID, the numerical value at 0x000023F0 is can be read directly in processor, or reads the corresponding ROM image file of the numerical value, and is read
The filename for taking the ROM image file obtains intrinsic message ID；When the numerical value of the preset address of ROM Space is not intrinsic message
When ID, processor can be by reading the corresponding ROM image file of numerical value of preset address or the file of the ROM image file
Name obtains the numerical value and the corresponding relationship using the numerical value and intrinsic message ID, obtains intrinsic message ID.As long as processor can be with
According to the numerical value in ROM Space at preset address, intrinsic message ID is obtained, the present embodiment does not do any restrictions to this.
It should be noted that the processor for this node in this step carries out CAN bus communication using intrinsic message ID,
The concrete mode of the assignment request information of special packet ID is sent to default node, i.e., default node obtains the specific report of this node
The concrete mode of the assignment request information of literary ID, can be by designer according to usage scenario and user demand self-setting, such as
The processor of this node can directly send the assignment request information of special packet ID using intrinsic message ID to default node, i.e.,
Default node can be after receiving assignment request information of this node using the intrinsic message ID special packet ID sent, Xiang Ben
Node sends corresponding special packet ID；The processor of this node can also be carried out using intrinsic message ID and other nodes
In CAN bus communication process, the assignment request information of special packet ID is sent to default node, i.e., default node can detect
When carrying out CAN bus communication using intrinsic message ID to this node, corresponding special packet ID is sent to this node.As long as guaranteeing
Default available node of node needs to carry out the solicited message of special packet ID distribution, and the present embodiment does not do any limit to this
System.
Specifically, the specific setting for the default node in this step, i.e., distribute the section of special packet ID in CAN bus
The specific setting of point, can be by designer or user according to usage scenario and user demand self-setting, as long as guaranteeing default
The assignment request information for the special packet ID that node can be sent according to each node sends corresponding specific report to each node
Literary ID, the present embodiment do not do any restrictions to this.
It is understood that the purpose of the present embodiment can not divided for such as single-chip microcontroller processor in each node
When losing (such as storage failure or being accidentally erased) with the special packet ID or special packet ID of distribution, the intrinsic report of itself is utilized
Literary ID carries out CAN bus communication, obtains the special packet ID of the default node distribution in CAN bus, realizes full-automatic distribution.For
Intersection occurs for the special packet ID for preventing intrinsic message ID and default node from distributing, each respective intrinsic message ID of node and pre-
If isolation uses the special packet ID of node distribution in a certain range respectively.That is, each respective intrinsic report of node
For literary ID in the first preset range, presetting node is corresponding special packet ID of each node distribution in the second default model
In enclosing, and intersection is not present in the first preset range and the second preset range.As the message ID of CAN bus uses 29 extension classes
When message ID, total can assignment message sum have 229A (0x20000000) it is default can be arranged first by the way of such as table 2
Range (intrinsic message ID range) and the second preset range (special packet ID range).As long as can ensure that there is no identical solid
There are message ID and special packet ID, the present embodiment does not do any restrictions to this.
Allocation table is isolated in table 2-2 message ID
Step 102: receiving and storing the special packet ID that default node returns, and total using special packet ID progress CAN
Line communication.
Wherein, this step interior joint can receive the specific of default node return using intrinsic message ID by CAN bus
Message ID, i.e., default node can use the respective intrinsic message ID of each node, send corresponding specific report to each node
Literary ID.
It is understood that respectively right for the corresponding special packet ID of processor storage of each node and utilization
The special packet ID that answers carries out the concrete mode of CAN bus communication, can using same as the prior art or similar mode into
Row, the present embodiment do not do any restrictions to this.
In the present embodiment, each node carries out special packet ID using pre-assigned intrinsic message ID in the embodiment of the present invention
Secondary distribution, not only facilitate extension, but also be adapted to specific CAN bus topological classification；And consolidated by reliable and stable
There is the setting of message ID, can be lost to avoid special packet ID or the unexpected bus rewritten when caused CAN bus communicates is wrong
Accidentally, the reliability of CAN bus communication is improved, the user experience is improved.
Referring to FIG. 3, Fig. 3 is a kind of CAN bus based node message ID distribution dress provided by the embodiment of the present invention
The structure chart set.The apparatus may include:
Sending module 100, if having special packet ID for not stored, by CAN bus using intrinsic message ID to pre-
If the assignment request information of node transmission special packet ID；
Receiving module 200, the special packet ID returned for receiving and storing default node, and using special packet ID into
The communication of row CAN bus.
Optionally, which can also include:
Module is obtained, for obtaining intrinsic message ID according to the numerical value in ROM Space at preset address.
Optionally, module is obtained, may include:
Reading submodule is used for the corresponding ROM image file of reading numerical values, obtains intrinsic message ID.
Optionally, reading submodule may include:
Reading unit obtains intrinsic message ID for reading the filename of ROM image file；Wherein, include in filename
Intrinsic message ID.
In the present embodiment, each node carries out special packet ID using pre-assigned intrinsic message ID in the embodiment of the present invention
Secondary distribution, not only facilitate extension, but also be adapted to specific CAN bus topological classification；And consolidated by reliable and stable
There is the setting of message ID, can be lost to avoid special packet ID or the unexpected bus rewritten when caused CAN bus communicates is wrong
Accidentally, the reliability of CAN bus communication is improved, the user experience is improved.
In addition, the embodiment of the invention also provides a kind of CAN bus based node message ID distributing equipments, comprising: deposit
Reservoir, for storing computer program；Processor realizes the base as provided by above-described embodiment when for executing computer program
In the node message ID distribution method of CAN bus the step of.
Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment and
For equipment, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is referring to method portion
It defends oneself bright.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
CAN bus based node message ID distribution method, device and equipment provided by the present invention are carried out above
It is discussed in detail.Used herein a specific example illustrates the principle and implementation of the invention, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention.It should be pointed out that for the common skill of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for art personnel, these change
It is also fallen within the protection scope of the claims of the present invention into modification.
Claims (10)
1. a kind of CAN bus based node message ID distribution method characterized by comprising
If not stored have special packet ID, the specific report is sent to default node using intrinsic message ID by CAN bus
The assignment request information of literary ID；
The special packet ID that the default node returns is received and stored, and total using special packet ID progress CAN
Line communication.
2. CAN bus based node message ID distribution method according to claim 1, which is characterized in that described to pass through
CAN bus is sent using intrinsic message ID to default node before the assignment request information of the special packet ID, further includes:
According to the numerical value in ROM Space at preset address, the intrinsic message ID is obtained.
3. CAN bus based node message ID distribution method according to claim 2, which is characterized in that the basis
The numerical value of the preset address of ROM Space obtains the intrinsic message ID, comprising:
The corresponding ROM image file of the numerical value is read, the intrinsic message ID is obtained.
4. CAN bus based node message ID distribution method according to claim 3, which is characterized in that the reading
The corresponding ROM image file of the numerical value, obtains the intrinsic message ID, comprising:
The filename of the ROM image file is read, the intrinsic message ID is obtained；Wherein, comprising described in the filename
Intrinsic message ID.
5. CAN bus based node message ID distribution method according to any one of claims 1 to 4, which is characterized in that
The intrinsic message ID is in the first preset range, and the special packet ID is in the second preset range, and described first is default
Intersection is not present in range and second preset range.
6. a kind of CAN bus based node message ID distributor characterized by comprising
Sending module is sent out using intrinsic message ID to default node if having special packet ID for not stored by CAN bus
Send the assignment request information of the special packet ID；
Receiving module, the special packet ID returned for receiving and storing the default node, and utilize the specific report
Literary ID carries out CAN bus communication.
7. CAN bus based node message ID distributor according to claim 6, which is characterized in that further include:
Module is obtained, for obtaining the intrinsic message ID according to the numerical value in ROM Space at preset address.
8. CAN bus based node message ID distributor according to claim 7, which is characterized in that the acquisition
Module, comprising:
Reading submodule obtains the intrinsic message ID for reading the corresponding ROM image file of the numerical value.
9. CAN bus based node message ID distributor according to claim 8, which is characterized in that the reading
Submodule, comprising:
Reading unit obtains the intrinsic message ID for reading the filename of the ROM image file；Wherein, the file
It include the intrinsic message ID in name.
10. a kind of CAN bus based node message ID distributing equipment characterized by comprising
Memory, for storing computer program；
Processor is realized when for executing the computer program and is based on CAN bus as described in any one of claim 1 to 5
Node message ID distribution method the step of.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810884162.4A CN109120735A (en) | 2018-08-06 | 2018-08-06 | CAN bus based node message ID distribution method, device and equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810884162.4A CN109120735A (en) | 2018-08-06 | 2018-08-06 | CAN bus based node message ID distribution method, device and equipment |
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| CN109120735A true CN109120735A (en) | 2019-01-01 |
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| CN201810884162.4A Pending CN109120735A (en) | 2018-08-06 | 2018-08-06 | CAN bus based node message ID distribution method, device and equipment |
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