CN102843266A - CAN network data transmitting method - Google Patents
CAN network data transmitting method Download PDFInfo
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- CN102843266A CN102843266A CN2011101690890A CN201110169089A CN102843266A CN 102843266 A CN102843266 A CN 102843266A CN 2011101690890 A CN2011101690890 A CN 2011101690890A CN 201110169089 A CN201110169089 A CN 201110169089A CN 102843266 A CN102843266 A CN 102843266A
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Abstract
The invention provides a CAN (Controller Area Network) network data transmitting method. The method comprises the steps as follows: setting transmitting sequences of all CAN nodes in a CAN network respectively; and transmitting information to other CAN nodes in sequence through all CAN nodes based on relevant set transmitting sequences. With the method, the disadvantage that the information is synchronously transmitted to one CAN node via a plurality of CAN nodes in current CAN network, the CAN node just can process one information at one time, which leads to that the information is easily lost can be solved; the CAN nodes which receive the information can discontinuously receive the information from other CAN nodes, so that the reliability in information receiving of the CAN node in the CAN network can be greatly improved.
Description
Technical field
The invention belongs to data and send the field, be specifically related to a kind of CAN network data sending method.
Background technology
At present, electronic equipment grows with each passing day, and communications facility is flourishing day by day.Along with people's increases the dependence of electronic information, and is also increasingly high to the requirement of electronic equipment, therefore also complicated more as the most frequently used communication system CAN network of car load.In a CAN network, each equipment that can receive and dispatch all is the node of a CAN network, and these nodes have plenty of hub-and-spoke configuration; Have plenty of network structure, yet along with the becoming increasingly complex of CAN network, the applicant finds that the CAN network inevitably can run into a problem; Because CAN node number is many more; The amount of information of CAN network system is just big more, and CAN system reception information also has the limit, therefore works as a plurality of CAN nodes and sends information to a CAN node simultaneously; And this CAN node is disposable can only handle an information time, the problem of like this will Presence information losing.
Summary of the invention
To existing C AN network; Because a plurality of CAN nodes send information to a CAN node simultaneously; Can only handle an information and this CAN node is disposable; Thereby the technical problem that causes information to be prone to lose provides a kind of CAN network data sending method, and this method can improve the reliability of CAN node reception information in the CAN network greatly.
Technical scheme of the present invention is:
A kind of CAN network data sending method may further comprise the steps:
Step 1: the sending order of setting all CAN nodes in the CAN network respectively;
Step 2: all CAN nodes send information to other all CAN nodes successively according to the sending order of setting separately.
Advantage of the present invention: can learn that from technique scheme of the present invention CAN network data sending method is through comprising: the sending order of setting all CAN nodes in the CAN network respectively; All CAN nodes send information to other all CAN nodes successively according to the sending order of setting separately; Make the CAN node of reception information receive the information that other CAN node sends discontinuously; So just avoided in the existing CAN network a plurality of CAN nodes to send information to a CAN node simultaneously; Can only handle an information and this CAN node is disposable; Thereby the drawback that causes information to be prone to lose, therefore, CAN network data sending method of the present invention can improve the reliability of CAN node reception information in the CAN network greatly.
Description of drawings
The method flow diagram that Fig. 1 provides for CAN network data sending method of the present invention.
The method flow diagram of the embodiment that Fig. 2 provides for CAN network data sending method of the present invention.
The method flow diagram of another embodiment that Fig. 3 provides for CAN network data sending method of the present invention.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the present invention is solved, below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The method flow diagram that Fig. 1 provides for CAN network data sending method of the present invention is consulted Fig. 1, and CAN network data sending method may further comprise the steps:
Step 11: the sending order of setting all CAN nodes in the CAN network respectively;
In the practical implementation, this step 11 is specially:
Set the sending order of each CAN node in the CAN network at random, wherein sending order be respectively first, second ..., N, wherein N is the natural number greater than 1; And N is a CAN node number all in the CAN network; For example, when the CAN network has 5 CAN nodes, then can set sending order at random to these 5 CAN nodes; Certain CAN node first, certain CAN node second, certain CAN node the 3rd, certain CAN node the 4th, last CAN node the 5th.
Certainly, be a kind of execution mode of step 11 more than, in the practical implementation; This step 11 can also comprise that other method realizes setting respectively the sending order of all CAN nodes in the CAN network; For example, can confirm the order of its transmission according to CAN nodes different in the CAN network, as; Complexity, significance level according to the CAN information content that node sends ... Confirm which CAN node elder generation transmission information, which takes second place
Step 12: all CAN nodes send information to other all CAN nodes successively according to the sending order of setting separately.
In the practical implementation, when the CAN network sends order when only needing all CAN nodes to carry out once to send information in operation one secondary data, this step 12 is specially:
Sending order be first CAN node when receiving the system start-up instruction, send information to other all CAN nodes, and send when finishing when information, send this CAN nodal informations transmissions notice that finishes to other all CAN nodes; And
Sending order is that the CAN node of M is that first CAN node picks up counting when sending information from sending order, when timing time reaches time S, perhaps receives sending order and is the information that the CAN node of M-1 sends and send when finishing notice, sends information to other all CAN nodes; And when the information transmission finishes, send this CAN nodal informations to other all CAN nodes and send the notice that finishes, wherein S=T * (M-1), T is a Preset Time; M is a natural number, this M=(2,3 ... N), and M is according to ascending order value successively, promptly M successively value be 2; 3 ..., be N until value.
And send order when needing all CAN nodes to carry out repeatedly to send information in operation one secondary data when the CAN network, this step 12 is specially:
Sending order is that first CAN node is receiving the system start-up instruction; Receive sending order and be the information that the CAN node of N sends and send the notice that finishes; Be that the CAN node of N picks up counting when sending information perhaps, when timing time reaches time T, send information to other all CAN nodes from sending order; And when the information transmission finishes, send this CAN nodal informations to other all CAN nodes and send the notice that finishes; And
Sending order is that the CAN node of M is that first CAN node picks up counting when sending information from sending order, when timing time reaches time S, perhaps receives sending order and is the information that the CAN node of M-1 sends and send when finishing notice, sends information to other all CAN nodes; And when the information transmission finishes, send this CAN nodal informations to other all CAN nodes and send the notice that finishes, wherein S=T * (M-1), T is a Preset Time; M is a natural number, this M=(2,3 ... N), and M is according to ascending order value successively, promptly M successively value be 2; 3 ..., be N until value.
Be need further comprise according to need the circulate number of times of transmission information of all CAN nodes with being appreciated that:
Sending order is that first CAN node sends primary informations to other all CAN nodes at every turn, and with regard to stored count once, when stored count equaled above-mentioned all CAN nodes and need circulate the number of times of transmission information, CAN network data out of service were sent.
What this need explain be; " sending order " mentioned in the above-mentioned steps 12 except above-mentioned according to " first, second ..., N " order send successively outside; Can also according to " N, N-1 ..., second, first " order send successively; Certainly can also be other sending order, not do one by one at this and introduce.
In order to understand technical scheme of the present invention better, describe in detail with reference to the accompanying drawings and through specific embodiment.
The method flow diagram of the embodiment that Fig. 2 provides for CAN network data sending method of the present invention is consulted Fig. 2, and CAN network data sending method may further comprise the steps:
Step 21: sending order is that first CAN node (being called for short CAN node 1) is when receiving the system start-up instruction; CAN node 1 sends information to other all CAN nodes; And when the information transmission finishes, send this CAN nodal informations to other all CAN nodes and send the notice that finishes;
Step 22: sending order is that second CAN node (being called for short CAN node 2) picks up counting when CAN node 1 sends information; When timing time reaches time T; The information that perhaps receives 1 transmission of CAN node is sent when finishing notice; CAN node 2 sends information to other all CAN nodes, and when the information transmission finishes, sends this CAN nodal informations to other all CAN nodes and send the notice that finishes;
Step 23: sending order is that the 3rd CAN node (being called for short CAN node 3) picks up counting when CAN node 1 sends information; When timing time reaches time 2T; The information that perhaps receives 2 transmissions of CAN node is sent when finishing notice; CAN node 3 sends information to other all CAN nodes, and when the information transmission finishes, sends this CAN nodal informations to other all CAN nodes and send the notice that finishes;
Step 2n: sending order is that the CAN node (being called for short CAN node N) of N picks up counting when CAN node 1 sends information; When timing time reaches time (N-1) * T; The information that perhaps receives CAN node N-1 transmission is sent when finishing notice; CAN node N sends information to other all CAN nodes, and when the information transmission finishes, sends this CAN nodal informations to other all CAN nodes and send the notice that finishes.
It is understandable that; Because the CAN node of sending order between CAN node 3 and CAN node N; Its method of sending information is similar to the sending method of CAN node 3 and CAN node N; And can be by CAN node 3 and the like, therefore between step 23 and step 2n, omitted its step (see figure 2).
This embodiment is a kind of preferred version of the present invention, has increased overtime arbitration functions, i.e. the CAN node of back one transmission sends the notice that finishes in the information that the CAN node that receives last transmission sends; Perhaps when CAN node 1 sends information, pick up counting, when timing time reaches time (N-1) * T, send information to other all CAN nodes; And when the information transmission finishes, send this CAN nodal informations to other all CAN nodes and send the notice that finishes, such purpose is; Both guaranteed that all CAN nodes sent information successively in an orderly manner, and (for example transmission information is unsuccessful unusually generation to occur at some or an above CAN node; Can't send this CAN nodal information and send the notice that finishes) time; Can guarantee that back CAN node can normally send information, thereby guarantee that the CAN network data normally sends, in addition; It is unusual that the CAN network data sending method that this embodiment adopts can also make that which CAN node appearance the designer detects; It for example can obtain, because should occur unreceived CAN node unusually through its information state of receiving that which CAN node sends of CAN node of checking some reception information.
The method flow diagram of another embodiment that Fig. 3 provides for CAN network data sending method of the present invention is consulted Fig. 3, and CAN network data sending method may further comprise the steps:
Step 31: sending order is that first CAN node (being called for short CAN node 1) is when receiving the system start-up instruction; CAN node 1 sends information to other all CAN nodes; And when the information transmission finishes, send this CAN nodal informations to other all CAN nodes and send the notice that finishes;
Step 32: sending order is that second CAN node (being called for short CAN node 2) picks up counting when CAN node 1 sends information; When timing time reaches time T; The information that perhaps receives 1 transmission of CAN node is sent when finishing notice; CAN node 2 sends information to other all CAN nodes, and when the information transmission finishes, sends this CAN nodal informations to other all CAN nodes and send the notice that finishes;
Step 33: sending order is that the 3rd CAN node (being called for short CAN node 3) picks up counting when CAN node 1 sends information; When timing time reaches time 2T; The information that perhaps receives 2 transmissions of CAN node is sent when finishing notice; CAN node 3 sends information to other all CAN nodes, and when the information transmission finishes, sends this CAN nodal informations to other all CAN nodes and send the notice that finishes;
Step 3n: sending order is that the CAN node (being called for short CAN node N) of N picks up counting when CAN node 1 sends information; When timing time reaches time (N-1) * T; The information that perhaps receives CAN node N-1 transmission is sent when finishing notice; CAN node N sends information to other all CAN nodes, and when the information transmission finishes, sends this CAN nodal informations to other all CAN nodes and send the notice that finishes;
Step 40:CAN node 1 receives the information of CAN node N transmission and sends the notice that finishes; Be that the CAN node of N picks up counting when sending information perhaps from sending order; When timing time reached time T, CAN node 1 sent information to other all CAN nodes, and when the information transmission finishes; Send this CAN nodal information to other all CAN nodes and send the notice that finishes, return execution in step 32.
In like manner; Because the CAN node of sending order between CAN node 3 and CAN node N; Its method of sending information is similar to the sending method of CAN node 3 and CAN node N, and can be by CAN node 3 and the like, therefore between step 33 and step 3n, omitted its step (see figure 3).
By on can know; The scheme of a present embodiment and a last embodiment is roughly the same; Difference is; A last embodiment is used for the CAN network and sends order in operation one secondary data and only need all CAN nodes to carry out once to send information, and present embodiment is used for the CAN network and sends order in operation one secondary data and need all CAN nodes to carry out the information of repeatedly sending.
What this need explain be; The value of above-mentioned preset time T is greater than Y; Wherein Y be meant a CAN node to other all CAN nodes send information and to other all CAN nodes send this CAN nodal informations send finish notify the used time and, wherein Y can be obtained through experiment repeatedly by the designer.Preferably, said preset time T is greater than Y, and less than 2Y.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a CAN network data sending method is characterized in that, may further comprise the steps:
Step 1: the sending order of setting all CAN nodes in the CAN network respectively;
Step 2: all CAN nodes send information to other all CAN nodes successively according to the sending order of setting separately.
2. CAN network data sending method according to claim 1 is characterized in that said step 1 is specially:
Set the sending order of each CAN node in the CAN network at random, wherein sending order be respectively first, second ..., N, wherein N is the natural number greater than 1, and N is a CAN node number all in the CAN network.
3. CAN network data sending method according to claim 2 is characterized in that said step 2 is specially:
Sending order is that first CAN node is when receiving the system start-up instruction; Send information to other all CAN nodes; And when information is sent when finishing, sending order is that first CAN node sends this CAN nodal informations to other all CAN nodes and sends the notice that finishes; And
Sending order is that the CAN node of M is that first CAN node picks up counting when sending information from sending order, when timing time reaches time S, perhaps receives sending order and is the information that the CAN node of M-1 sends and send when finishing notice; Sending order is that the CAN node of M sends information to other all CAN nodes, and when the information transmission finishes, sends this CAN nodal informations to other all CAN nodes and send the notice that finishes; Wherein S=T * (M-1), T is a Preset Time, and M is a natural number; This M=(2,3 ... N), and M according to ascending order value successively.
4. CAN network data sending method according to claim 2 is characterized in that said step 2 is specially:
Sending order is that first CAN node is when receiving the system start-up instruction; Perhaps receiving sending order and be the information that the CAN node of N sends sends when finishing notice; Be that the CAN node of N picks up counting when sending information from sending order perhaps, and when timing time reaches time T, sending order is that first CAN node is to other all CAN nodes transmission information; And when the information transmission finishes, send this CAN nodal informations to other all CAN nodes and send the notice that finishes; And
Sending order is that the CAN node of M is that first CAN node picks up counting when sending information from sending order, when timing time reaches time S, perhaps receives sending order and is the information that the CAN node of M-1 sends and send when finishing notice; Send information to other all CAN nodes, and when the information transmission finishes, send this CAN nodal informations to other all CAN nodes and send the notice that finishes; Wherein S=T * (M-1), T is a Preset Time, and M is a natural number; This M=(2,3 ... N), and M according to ascending order value successively.
5. according to claim 3 or 4 described CAN network data sending methods; It is characterized in that; The value of said preset time T is greater than Y, wherein Y be meant a CAN node to other all CAN nodes send information and to other all CAN nodes send this CAN nodal informations send finish notify the used time and.
6. CAN network data sending method according to claim 5 is characterized in that, said preset time T is greater than Y, and less than 2Y.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101690890A CN102843266A (en) | 2011-06-22 | 2011-06-22 | CAN network data transmitting method |
| TW101122383A TW201300261A (en) | 2011-06-22 | 2012-06-22 | Method for transmitting CAN network data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101690890A CN102843266A (en) | 2011-06-22 | 2011-06-22 | CAN network data transmitting method |
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| CN102843266A true CN102843266A (en) | 2012-12-26 |
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| CN2011101690890A Pending CN102843266A (en) | 2011-06-22 | 2011-06-22 | CAN network data transmitting method |
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| TW (1) | TW201300261A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105045224A (en) * | 2015-05-29 | 2015-11-11 | 珠海格力电器股份有限公司 | Data transmission method and device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI552908B (en) * | 2013-07-09 | 2016-10-11 | Icm Inc | The installation of the vehicle operating system |
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| US5123100A (en) * | 1989-01-13 | 1992-06-16 | Nec Corporation | Timing control method in a common bus system having delay and phase correcting circuits for transferring data in synchronization and time division slot among a plurality of transferring units |
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