CN102621955A - System and method for realizing synchronous writing of rating data of multiple controllers based on CAN (controller area network) bus - Google Patents
System and method for realizing synchronous writing of rating data of multiple controllers based on CAN (controller area network) bus Download PDFInfo
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- CN102621955A CN102621955A CN2012100832244A CN201210083224A CN102621955A CN 102621955 A CN102621955 A CN 102621955A CN 2012100832244 A CN2012100832244 A CN 2012100832244A CN 201210083224 A CN201210083224 A CN 201210083224A CN 102621955 A CN102621955 A CN 102621955A
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Abstract
The invention relates to a system for realizing the synchronous writing of rating data of multiple controllers based on a CAN (controller area network) bus, which comprises a plurality of controllers, an upper computer and a power network, wherein the upper computer and each controller are all connected to the CAN bus, the power network is connected with each controller and provides different power supply voltages for the controllers, and each controller has a voltage detection function. The invention also relates to a method for realizing the synchronous writing of rating data of multiple controllers based on a CAN bus. According to the method, each controller detects the respective power supply voltage, and sets the respective power supply voltage as a CAN communication ID (identity); the upper computer determines the connection condition of each controller on the CAN bus according to the respective CAN communication ID; the coordinated and orderly communication between the upper computer and the controllers are ensured, and thereby realizing the synchronous writing of rating data of the multiple controllers. The system for realizing the synchronous writing of rating data of multiple controllers based on a CAN bus disclosed by the invention is simple in structure, and the method is simple to apply, low in implementation cost, and wide in application range.
Description
Technical field
The present invention relates to networking technology area, particularly CAN bussing technique field specifically is meant a kind of system and method that writes nominal data based on CAN bus realization multi-controller synchronously.
Background technology
Important role is being played the part of in being written in of nominal data in the controller production line, because the function of controller, performance are different, the parameter of the nominal data that writes in every kind of controller is also different.But for a kind of controller, the data that write are the same.The mode that nominal data writing mode in the present streamline still writes data with the manual controller one by one of manpower is that main, such mode needs artificial continuous each control of manually changing, and it is loaded down with trivial details to work, and causes that easily fatigue causes industrial accident.As far as each controller, it is again identical writing data simultaneously, and going one by one writes data and lose time very much.Along with the raising of factory to the requirement of benefit, more production line more and more relies on automation equipment, and these equipment are to improving the employee work environment and the very big help of enhancing productivity.But aspect the controller nominal data writes, there are not a kind of more feasible a plurality of controllers to write the method for nominal data simultaneously in the prior art.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art; Provide a kind of controller power source voltage detecting technology of utilizing to distinguish the ID of each controller on bus; And utilize ID priority arbitration mechanism in the CAN bus and retransmission mechanism to guarantee on the bus harmonious orderly each other of the communication between the host computer and each controller; And then it is write when realizing a plurality of controller nominal data, and simple in structure, easy to use; With low cost, what have wide range of applications realizes that based on the CAN bus multi-controller writes the system and method for nominal data function synchronously.
In order to realize above-mentioned purpose, of the present inventionly realize that based on the CAN bus system that multi-controller writes the nominal data function synchronously has following formation:
This system comprises a plurality of controllers, host computer and electric power network; Described each controller all is connected in described CAN bus; And be connected to described host computer through this CAN bus; Described each controller also is connected to described electric power network, and described electric power network is in order to providing the supply voltage that differs from one another to described each controller, and described each controller all has the voltage detecting function.
Should realize that multi-controller write in the system of nominal data function synchronously based on the CAN bus; Described each controller all has voltage detection unit; And the storage unit and the D/A conversion unit that are connected with described voltage detection unit; Described voltage detection unit also connects described electric power network, and described storage unit is connected to described host computer through the CAN bus.
Should realize that multi-controller write in the system of nominal data function synchronously based on the CAN bus; Described electric power network is the electric resistance partial pressure electric power network; The power bracket that described electric resistance partial pressure electric power network is confirmed divider resistance in the electric power network according to the service area and the static current sinking of described each controller, and the power supply partial pressure value of definite described each controller.
The present invention also provides a kind of method of utilizing described system to realize writing synchronously based on the multi-controller of CAN bus nominal data, and this method may further comprise the steps:
(1) described each controller detects supply voltage separately;
(2) described each controller basis supply voltage setting separately CAN communication ID separately;
(3) described host computer sends bind command through the CAN bus to described each controller;
(4) after described each controller receives described bind command, return described CAN communication ID to described host computer through described CAN bus;
(5) described host computer is confirmed the connection situation of each controller on the CAN bus according to each CAN communication ID that obtains;
(6) described host computer sends nominal data through the CAN bus to described each controller simultaneously;
(7) described host computer sends data through the CAN bus to described each controller and sends finish order and check code;
(8) described each controller receives after data send the order that finishes, and according to described check code described nominal data is carried out verification, and through the CAN bus to described host computer return state information;
(9) after described host computer receives described status information, confirm the state of each controller.
Should realize that multi-controller write in the method for nominal data function synchronously based on the CAN bus; Described each controller all has voltage detection unit; And the storage unit and the D/A conversion unit that are connected with described voltage detection unit; Described voltage detection unit also connects described electric power network, and described storage unit is connected to described host computer through the CAN bus, and described step (2) specifically may further comprise the steps:
(21) described each controller passes through voltage detection unit detection supply voltage separately separately;
(22) described AD conversion unit converts described supply voltage into digital quantity;
(23) the described digital quantity of described each controller is set to CAN communication ID separately.
Should realize that multi-controller write in the method for nominal data function synchronously based on the CAN bus, the length of CAN communication ID is standard frame length or expansion frame length.
Should realize that multi-controller write in the method for nominal data function synchronously based on the CAN bus, described step (5) specifically may further comprise the steps:
(51) described host computer receives CAN communication ID and the counting that each controller returns through the CAN bus according to CAN bus ID priority arbitration mechanism and retransmission mechanism;
(52) described host computer is confirmed the situation that is connected of each controller on the CAN bus according to described counting and each the CAN communication ID that is received.
Should realize that multi-controller write in the method for nominal data function synchronously based on the CAN bus, described check code is the CRC check sign indicating number.
Should realize that multi-controller write in the method for nominal data function synchronously based on the CAN bus, described step (8) specifically may further comprise the steps:
(81) described each controller receives data and sends finish order and CRC check sign indicating number;
(82) described each controller carries out CRC check to the nominal data that receives, and judges whether check results is consistent with the CRC check sign indicating number, if consistent, then gets into step (82), if inconsistent, then gets into step (83);
(83) described controller is stored nominal data, and returns reception data success command through described CAN bus to described host computer;
(84) described controller returns to described host computer through described CAN bus and receives the data failure order.
That has adopted this invention realizes that based on the CAN bus multi-controller writes the system and method for nominal data function synchronously; Its system comprises a plurality of controllers, host computer and electric power network; Described each controller all is connected in described CAN bus; And be connected to described host computer through this CAN bus; Described each controller also is connected to described electric power network, and described electric power network is in order to providing the supply voltage that differs from one another to described each controller, and described each controller all has the voltage detecting function.In the described method, each controller detects supply voltage separately, and according to separately supply voltage setting CAN communication ID separately; Host computer is confirmed the connection situation of each controller on the CAN bus based on each CAN communication ID; And utilize ID priority arbitration mechanism in the CAN bus and retransmission mechanism to guarantee on the bus harmonious orderly each other of the communication between the host computer and each controller; And then write when realizing a plurality of controller nominal data; And of the present invention to realize that based on the CAN bus multi-controller writes the system architecture of nominal data function synchronously simple; It is easy that method is used, and realizes with low costly, and range of application is also comparatively extensive.
Description of drawings
Fig. 1 realizes that based on the CAN bus multi-controller writes the structural representation of the system of nominal data function synchronously for of the present invention.
Fig. 2 realizes that based on the CAN bus multi-controller writes the flow chart of steps of the method for nominal data function synchronously for of the present invention.
Fig. 3 realizes that based on the CAN bus multi-controller writes the schematic flow sheet of method in practical application of nominal data function synchronously for of the present invention.
Embodiment
In order more to be expressly understood technology contents of the present invention, the special following examples of lifting specify.
See also shown in Figure 1ly, be of the present invention and realize that based on the CAN bus multi-controller writes the structural representation of the system of nominal data function synchronously.
In one embodiment; This comprises a plurality of controllers, host computer and electric power network based on the system that CAN bus realization multi-controller writes the nominal data function synchronously; Described each controller all is connected in described CAN bus; And be connected to described host computer through this CAN bus; Described each controller also is connected to described electric power network, and described electric power network is in order to providing the supply voltage that differs from one another to described each controller, and described each controller all has the voltage detecting function.
Utilize the described system of this embodiment to realize writing synchronously based on the multi-controller of CAN bus the method for nominal data, as shown in Figure 2, described method may further comprise the steps:
(1) described each controller detects supply voltage separately;
(2) described each controller basis supply voltage setting separately CAN communication ID separately;
(3) described host computer sends bind command through the CAN bus to described each controller;
(4) after described each controller receives described bind command, return described CAN communication ID to described host computer through described CAN bus;
(5) described host computer is confirmed the connection situation of each controller on the CAN bus according to each CAN communication ID that obtains;
(6) described host computer sends nominal data through the CAN bus to described each controller simultaneously;
(7) described host computer sends data through the CAN bus to described each controller and sends finish order and check code;
(8) described each controller receives after data send the order that finishes, and according to described check code described nominal data is carried out verification, and through the CAN bus to described host computer return state information;
(9) after described host computer receives described status information, confirm the state of each controller.
In a kind of more preferably embodiment; Storage unit and D/A conversion unit that described each controller all has voltage detection unit and is connected with this voltage detection unit; Described voltage detection unit also connects described electric power network, and described storage unit is connected to described host computer through the CAN bus.
Utilize this more preferably the described system of embodiment realize writing synchronously in the method for nominal data function based on the multi-controller of CAN bus, described step (2) specifically may further comprise the steps:
(21) described each controller passes through voltage detection unit detection supply voltage separately separately;
(22) described AD conversion unit converts described supply voltage into digital quantity;
(23) the described digital quantity of described each controller is set to CAN communication ID separately, and the length of this CAN communication ID can be standard frame length or expansion frame length.
In another preferred embodiment, described step (5) specifically may further comprise the steps:
(51) described host computer receives CAN communication ID and the counting that each controller returns through the CAN bus according to CAN bus ID priority arbitration mechanism and retransmission mechanism;
(52) described host computer is confirmed the situation that is connected of each controller on the CAN bus according to described counting and each the CAN communication ID that is received.
In a kind of further preferred embodiment, described check code is the CRC check sign indicating number.Described step (8) specifically may further comprise the steps:
(81) described each controller receives data and sends finish order and CRC check sign indicating number;
(82) described each controller carries out CRC check to the nominal data that receives, and judges whether check results is consistent with the CRC check sign indicating number, if consistent, then gets into step (82), if inconsistent, then gets into step (83);
(83) described controller is stored nominal data, and returns reception data success command through described CAN bus to described host computer;
(84) described controller returns to described host computer through described CAN bus and receives the data failure order.
In preferred embodiment; Described electric power network is the electric resistance partial pressure electric power network; The power bracket that described electric resistance partial pressure electric power network is confirmed divider resistance in the electric power network according to the service area and the static current sinking of described each controller, and the power supply partial pressure value of definite described each controller.
In practical application, the CAN bus is used more and more widely, and in a lot of controllers, the measuring ability of supply voltage is arranged all, especially in automobile electronics, occupies dominant position.Therefore can utilize above-mentioned advantage, realize writing simultaneously the method for nominal data based on a plurality of controllers of CAN bus.
Controller generally all has the measuring ability to supply voltage own, data storage, wipe, write-in functions, and CAN bus communication function.In application, method of the present invention, as shown in Figure 3, may further comprise the steps:
At first a plurality of controllers are linked into one by electric resistance partial pressure and can guarantee in the electric power network that each controller can both normally move; The voltage of the power supply of each controller needs different; Particularly, the electric resistance partial pressure electric power network is according to the quantity of controller, minimum and maximum service area; And the static consumed current of controller, go out the power bracket of power supply divider resistance through the Ohm law primary Calculation.And according to the quantity of controller, the power supply electric power thus supplied, and design and hope the dividing potential drop situation on each controller voltage, calculate exact value and each controller power source partial pressure value of resistance through Ohm law.
Then, each controller is according to gathering own supply voltage, and is converted into digital quantity to power supply voltage signal through the AD collection, inserts among the ID of CAN.The ID length of CAN can be made as standard frame or expansion frame as requested.According to the ID priority arbitration mechanism of CAN bus itself, the priority that the controller that ID is more little sends is high more, but must guarantee that the ID priority of host computer setting is the highest.
Then; Host computer is through sending bind command on the CAN bus; Host computer receives the ID and the counting of replying; And according to ID priority arbitration mechanism and retransmission mechanism according to CAN bus itself, can judge on which controller do not communicate by letter according to the ID situation of counting situation and reception simultaneously, be convenient to the inspection problem.
After confirming that the connection situation is normal, host computer sends nominal data simultaneously to all controllers, and all controllers receive nominal data, and each controller receives only during this period, on bus, does not send any data.
When all controllers sent nominal data simultaneously, host computer oneself calculated the CRC check sign indicating number according to data content at host computer.Nominal data is sent the back host computer transmission data that finish and is sent finish order and CRC check sign indicating number.
After verified; Controller carries out CRC check to the data that receive, and the CRC check sign indicating number with the host computer transmission compares simultaneously, if identical then deposit data in storer; Continuous transmitting and receiving data success command on the bus simultaneously is up to receiving the host computer answer; If CRC check sign indicating number difference then data do not deposit storer in, constantly transmitting and receiving data failure order on the bus simultaneously is up to receiving the host computer answer.Upper Data Receiving situation according to each control of data conditions judgement on the bus, and reply each controller, the condition of oestrusing simultaneously informs operating personnel.
That has adopted this invention realizes that based on the CAN bus multi-controller writes the system and method for nominal data function synchronously; Its system comprises a plurality of controllers, host computer and electric power network; Described each controller all is connected in described CAN bus; And be connected to described host computer through this CAN bus; Described each controller also is connected to described electric power network, and described electric power network is in order to providing the supply voltage that differs from one another to described each controller, and described each controller all has the voltage detecting function.In the described method, each controller detects supply voltage separately, and according to separately supply voltage setting CAN communication ID separately; Host computer is confirmed the connection situation of each controller on the CAN bus based on each CAN communication ID; And utilize ID priority arbitration mechanism in the CAN bus and retransmission mechanism to guarantee on the bus harmonious orderly each other of the communication between the host computer and each controller; And then write when realizing a plurality of controller nominal data; And of the present invention to realize that based on the CAN bus multi-controller writes the system architecture of nominal data function synchronously simple; It is easy that method is used, and realizes with low costly, and range of application is also comparatively extensive.
In this instructions, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, instructions and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (9)
1. realize that based on the CAN bus multi-controller writes the system of nominal data function synchronously for one kind; It is characterized in that; Described system comprises a plurality of controllers, host computer and electric power network; Described each controller all is connected in described CAN bus, and is connected to described host computer through this CAN bus, and described each controller also is connected to described electric power network; Described electric power network is in order to providing the supply voltage that differs from one another to described each controller, and described each controller all has the voltage detecting function.
2. the system that writes the nominal data function based on CAN bus realization multi-controller synchronously according to claim 1; It is characterized in that; Described each controller all has voltage detection unit; And the storage unit and the D/A conversion unit that are connected with described voltage detection unit, described voltage detection unit also connects described electric power network, and described storage unit is connected to described host computer through the CAN bus.
3. the system that writes the nominal data function based on CAN bus realization multi-controller synchronously according to claim 1 and 2; It is characterized in that; Described electric power network is the electric resistance partial pressure electric power network; The power bracket that described electric resistance partial pressure electric power network is confirmed divider resistance in the electric power network according to the service area and the static current sinking of described each controller, and the power supply partial pressure value of definite described each controller.
4. method of utilizing the described system of claim 1 to realize writing synchronously based on the multi-controller of CAN bus nominal data is characterized in that described method may further comprise the steps:
(1) described each controller detects supply voltage separately;
(2) described each controller basis supply voltage setting separately CAN communication ID separately;
(3) described host computer sends bind command through the CAN bus to described each controller;
(4) after described each controller receives described bind command, return described CAN communication ID to described host computer through described CAN bus;
(5) described host computer is confirmed the connection situation of each controller on the CAN bus according to each CAN communication ID that obtains;
(6) described host computer sends nominal data through the CAN bus to described each controller simultaneously;
(7) described host computer sends data through the CAN bus to described each controller and sends finish order and check code;
(8) described each controller receives after data send the order that finishes, and according to described check code described nominal data is carried out verification, and through the CAN bus to described host computer return state information;
(9) after described host computer receives described status information, confirm the state of each controller.
5. the method that writes the nominal data function based on CAN bus realization multi-controller synchronously according to claim 4; It is characterized in that; Described each controller all has voltage detection unit, and the storage unit and the D/A conversion unit that are connected with described voltage detection unit, and described voltage detection unit also connects described electric power network; Described storage unit is connected to described host computer through the CAN bus, and described step (2) specifically may further comprise the steps:
(21) described each controller passes through voltage detection unit detection supply voltage separately separately;
(22) described AD conversion unit converts described supply voltage into digital quantity;
(23) the described digital quantity of described each controller is set to CAN communication ID separately.
6. according to claim 5ly realize that based on the CAN bus multi-controller writes the method for nominal data function synchronously, it is characterized in that the length of CAN communication ID is standard frame length or expansion frame length.
7. according to claim 4ly realize that based on the CAN bus multi-controller writes the method for nominal data function synchronously, is characterized in that described step (5) specifically may further comprise the steps:
(51) described host computer receives CAN communication ID and the counting that each controller returns through the CAN bus according to CAN bus ID priority arbitration mechanism and retransmission mechanism;
(52) described host computer is confirmed the situation that is connected of each controller on the CAN bus according to described counting and each the CAN communication ID that is received.
8. according to claim 4ly realize that based on the CAN bus multi-controller writes the method for nominal data function synchronously, is characterized in that described check code is the CRC check sign indicating number.
9. according to claim 7ly realize that based on the CAN bus multi-controller writes the method for nominal data function synchronously, is characterized in that described step (8) specifically may further comprise the steps:
(81) described each controller receives data and sends finish order and CRC check sign indicating number;
(82) described each controller carries out CRC check to the nominal data that receives, and judges whether check results is consistent with the CRC check sign indicating number, if consistent, then gets into step (82), if inconsistent, then gets into step (83);
(83) described controller is stored nominal data, and returns reception data success command through described CAN bus to described host computer;
(84) described controller returns to described host computer through described CAN bus and receives the data failure order.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210083224.4A CN102621955B (en) | 2012-03-26 | 2012-03-26 | System and method for realizing synchronous writing of rating data of multiple controllers based on CAN (controller area network) bus |
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| CN201210083224.4A CN102621955B (en) | 2012-03-26 | 2012-03-26 | System and method for realizing synchronous writing of rating data of multiple controllers based on CAN (controller area network) bus |
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| CN108259368A (en) * | 2018-01-11 | 2018-07-06 | 郑州云海信息技术有限公司 | A kind of data transmission system and method based on FPGA |
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| CN108494649A (en) * | 2018-01-30 | 2018-09-04 | 中国航天电子技术研究院 | The bus system and data transmission method being combined with homogeneous state time slot based on poll |
| CN111506039A (en) * | 2020-03-13 | 2020-08-07 | 重庆利龙科技产业(集团)有限公司 | Vehicle window controller calibration system and method based on multitask scheduling L IN communication |
| CN111930656A (en) * | 2020-08-11 | 2020-11-13 | 东风电子科技股份有限公司 | System and method for realizing vehicle VIN code flash verification based on Labview |
| CN112440740A (en) * | 2020-12-01 | 2021-03-05 | 东风越野车有限公司 | Vehicle power take-off system and power take-off and calibration method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102621955B (en) | 2014-01-15 |
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