CN216981921U - CAN information processing system - Google Patents
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- CN216981921U CN216981921U CN202220452976.2U CN202220452976U CN216981921U CN 216981921 U CN216981921 U CN 216981921U CN 202220452976 U CN202220452976 U CN 202220452976U CN 216981921 U CN216981921 U CN 216981921U
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Abstract
The utility model discloses a CAN information processing system, which comprises a CAN transceiver, an MCU subsystem and at least one functional subsystem, wherein the MCU subsystem comprises a CAN transceiver device, and the functional subsystem comprises an auxiliary CAN receiving device; the input and output ends of the CAN transceiver are used for receiving external CAN network information, and the output end of the CAN transceiver is connected with the CAN transceiver and the auxiliary CAN receiving device respectively. The CAN information processing system CAN support the parallel receiving of the external CAN network information through the CAN transmitting and receiving device and the auxiliary CAN receiving device, and improves the data receiving performance of the CAN information processing system.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to a CAN information processing system.
Background
A Controller Area Network (CAN) is a bus protocol, which has the characteristics of low cost, high speed, good real-time performance, high reliability and the like, and is widely applied to the field of vehicles. The CAN information processing system in the prior art usually only adopts one CAN transceiver to receive CAN information of an external CAN network, and under the background of the intelligent cockpit era, frequent interaction of a large amount of data causes the existing scheme to have higher requirements on the data receiving performance of the CAN transceiver, and how to optimize the CAN information processing system is a technical problem which needs to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model provides a CAN information processing system which CAN assist in receiving data and improve the data receiving performance of the system by respectively arranging auxiliary CAN receiving devices for each functional subsystem in a vehicle.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions: the CAN information processing system comprises a CAN transceiver, an MCU subsystem and at least one functional subsystem, wherein the MCU subsystem comprises a CAN transceiver device, and the functional subsystem comprises an auxiliary CAN receiving device;
the input and output ends of the CAN transceiver are used for receiving external CAN network information, and the output end of the CAN transceiver is connected with the CAN transceiver and the auxiliary CAN receiving device respectively.
As an improvement of the above scheme, the CAN transceiver device includes a transceiver processing module and a first CAN controller, and the CAN transceiver is connected to the CAN transceiver device in the following manner:
the output end of the CAN transceiver is connected with the first input end of the first CAN controller, and the first output end of the first CAN controller is connected with the first input end of the transceiving processing module.
As an improvement of the above scheme, the auxiliary CAN receiving device includes a receiving processing module and a second CAN controller, and the CAN transceiver is connected to the auxiliary CAN receiving device in the following manner:
the output end of the CAN transceiver is connected with the input end of the second CAN controller, and the output end of the second CAN controller is connected with the input end of the receiving processing module.
As an improvement of the above scheme, the CAN transceiver further includes an IO controller, the control signal output end of the transceiver processing module is connected to the control signal input end of the IO controller, and the first control signal output end of the IO controller is connected to the control end of the CAN transceiver.
As an improvement of the above scheme, the controller further comprises a buffer, an input end of the buffer is connected with an output end of the CAN transceiver, an output end of the buffer is connected with the auxiliary CAN receiving device, and a control end of the buffer is connected with a second control signal output end of the IO controller.
As an improvement of the above scheme, the transceiving processing module is a microcontroller.
As an improvement of the above scheme, the MCU subsystem further includes a first data processing module, and the functional subsystem further includes a second data processing module;
then the output of the CAN transceiver respectively with CAN transceiver, supplementary CAN receiving arrangement connects, specifically includes: the output end of the CAN transceiver is respectively connected with the first input end of the CAN transceiver and the input end of the auxiliary CAN receiving device;
the first output end of the CAN transceiver is connected with the input end of the first data processing module, and the output end of the auxiliary CAN receiver is connected with the input end of the second data processing module.
As an improvement of the above scheme, the output end of the second data processing module is connected to a communication interface provided in the functional subsystem, the communication interface of the functional subsystem is connected to a communication interface provided in the MCU subsystem, the communication interface of the MCU subsystem is connected to a second input end of the CAN transceiver, the second output end of the CAN transceiver is connected to the input end of the CAN transceiver, and the input/output end of the CAN transceiver is configured to output a signal to an external CAN network.
Compared with the prior art, the CAN information processing system provided by the utility model comprises a CAN transceiver, an MCU subsystem and at least one functional subsystem, wherein the MCU subsystem comprises a CAN transceiver device, and the functional subsystem comprises an auxiliary CAN receiving device; the input end and the output end of the CAN transceiver are used for receiving external CAN network information, and the output end of the CAN transceiver is respectively connected with the CAN transceiver and the auxiliary CAN receiving device; the CAN information processing system CAN support the parallel receiving of the external CAN network information through the CAN transmitting and receiving device and the auxiliary CAN receiving device, and improves the data receiving performance of the CAN information processing system.
Drawings
FIG. 1 is a schematic diagram of a preferred embodiment of a CAN information processing system provided by the present invention;
fig. 2 is a schematic application diagram of another preferred embodiment of the CAN information processing system provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
The embodiment of the utility model provides a CAN information processing system, which comprises a CAN transceiver, an MCU subsystem and at least one functional subsystem, wherein the MCU subsystem comprises a CAN transceiver device, and the functional subsystem comprises an auxiliary CAN receiving device;
the input and output ends of the CAN transceiver are used for receiving external CAN network information, and the output end of the CAN transceiver is respectively connected with the CAN transceiver and the auxiliary CAN receiving device.
Specifically, referring to fig. 1, it is a schematic structural diagram of a preferred embodiment of a CAN information processing system provided in the present invention, the CAN information processing system is mainly disposed in an intelligent cabin control domain, and mainly includes a CAN transceiver 1, an MCU subsystem 2, and a functional subsystem 3, the MCU subsystem 2 includes a CAN transceiver 21, the functional subsystem 3 includes an auxiliary CAN receiver 31, an input/output end of the CAN transceiver 1 is used for receiving information (external CAN network information) on a CAN bus, and an output end of the CAN transceiver 1 is connected to the CAN transceiver 21 and the auxiliary CAN receiver 31, respectively. In practical application, the CAN bus adopts double-wire transmission, two wires are respectively used as CANH and CANL, the CAN transceiver 1 receives CAN information on the CAN bus, converts signal level into logic state, and transmitted to the CAN transceiver 21 and the auxiliary CAN receiver 31, the CAN transceiver 21 and the auxiliary CAN receiver 31 are provided with filtering modules, so that the CAN transceiver 21 and the auxiliary CAN receiver 31 receive only specific information, and assuming that the functional subsystem 3 is the functional subsystem 3 related to the driver's driving norm, the auxiliary CAN receiver 31 of the functional subsystem 3 receives the vehicle body information, such as engine speed, vehicle speed, steering wheel angle, brake, throttle, turn signals, for calculating whether to evaluate the driving habits of the driver to be safe and normative, and generating guide information according to the signals to guide the driver to drive safely; it should be noted that the number of the functional subsystems 3 can be set according to the actual situation, the types of the functional subsystems 3 are determined by the data processed by the subsystems, when a plurality of functional subsystems 3 exist, the types of each subsystem do not affect each other, and generally, in the actual application process, when a plurality of functional subsystems 3 exist, the types of each subsystem are different from each other; generally, data of the application message type is processed by the corresponding functional subsystem 3, the requirement of the data on the real-time property is low, and the requirements of data of the network management message and the diagnosis message type on the real-time property are high, and the data are directly received and processed by the MCU subsystem 2. The CAN information processing system CAN support the parallel receiving of the external CAN network information through the CAN transceiver device 21 and the auxiliary CAN receiving device 31, so that the CAN information received by the CAN transceiver 1 CAN be quickly received by the corresponding subsystem, and the data receiving performance of the CAN information processing system is improved.
Referring to fig. 2, which is a schematic application diagram of a preferred embodiment of a CAN information processing system provided by the present invention, as an improvement of the foregoing solution, the CAN transceiver 21 includes a transceiver processing module 211 and a first CAN controller 212, and the CAN transceiver 1 and the CAN transceiver 21 are connected by:
the output end of the CAN transceiver 1 is connected to the first input end of the first CAN controller 212, and the first output end of the first CAN controller 212 is connected to the first input end of the transceiving processing module 211.
Specifically, the CAN transceiver 21 mainly includes a transceiver processing module 211 and a first CAN controller 212, an output terminal of the CAN transceiver 1 is connected to a first input terminal of the first CAN controller 212, and a first output terminal of the first CAN controller 212 is connected to a first input terminal of the transceiver processing module 211. The level conversion circuit arranged in the CAN transceiver 1 is only responsible for converting TTL signals of the CAN controller and differential signals of the CAN bus, that is, is responsible for converting between logic levels and physical signals, the first CAN controller 212 is provided with a module for filtering information (hardware filtering or software filtering), the first CAN controller 212 realizes all functions of a data link layer in a CAN protocol, CAN automatically complete analysis of the CAN protocol, the transceiver processing module 211 runs a CAN signal receiving program to receive CAN messages (CAN information), and in addition, the transceiver processing module 211 CAN optionally complete the following work: the transceiver module 211 is a microcontroller in general, based on the operation of a register, initialization of a CAN controller, transmission of a CAN message, and the like.
As a modification of the above scheme, with reference to fig. 2, the auxiliary CAN receiver 31 includes a receiving processing module 311 and a second CAN controller 312, and the CAN transceiver 1 and the auxiliary CAN receiver 31 are connected in the following manner:
the output end of the CAN transceiver 1 is connected to the input end of the second CAN controller 312, and the output end of the second CAN controller 312 is connected to the input end of the receiving processing module 311.
Specifically, the auxiliary CAN receiving device 31 mainly comprises a receiving processing module 311 and a second CAN controller 312, an output end of the CAN transceiver 1 is connected with an input end of the second CAN controller 312, and an output end of the second CAN controller 312 is connected with an input end of the receiving processing module 311. In practical application, the second CAN controller 312 selectively screens signals sent by the CAN transceiver 1 and CAN receive data of a CAN standard protocol, the receiving processing module 311 runs a CAN signal receiving program to receive the signals and share the CAN data processing pressure of the CAN transceiver 21, and assuming that the functional subsystem 3 is a subsystem related to an instrument, the second CAN controller 312 in the functional subsystem 3 only receives data related to the instrument, such as vehicle speed information, engine oil pressure information, water temperature information, fuel oil information, electric quantity information, and the like.
With reference to fig. 2, as an improvement of the above scheme, the CAN transceiver 21 further includes an IO controller 213, a control signal output end of the transceiver processing module 211 is connected to a control signal input end of the IO controller 213, and a first control signal output end of the IO controller 213 is connected to a control end of the CAN transceiver 1.
Specifically, the CAN transceiver 21 further includes an IO controller 213, a control signal input end of the IO controller 213 is connected to a control signal output end of the transceiver processing module 211, and a first control signal output end of the IO controller 213 is connected to a control end of the CAN transceiver 1. The transceiving processing module 211 sends a first communication control instruction to the IO controller 213, after receiving the instruction, the IO controller 213 controls the CAN transceiver 1 by outputting a corresponding level signal to the control terminal of the CAN transceiver 1, so as to realize disconnection and connection control of the system and an external CAN network, and when the system is isolated from an external bus, the whole CAN network is in a dormant state.
With reference to fig. 2, as an improvement of the above scheme, the system further includes a buffer 4, an input end of the buffer is connected to an output end of the CAN transceiver 1, an output end of the buffer 4 is connected to the auxiliary CAN receiving device 31, and a control end of the buffer 4 is connected to the second control signal output end of the IO controller 213.
Specifically, an input terminal of the buffer 4 is connected to an output terminal of the CAN transceiver 1, an output terminal of the buffer 4 is connected to the auxiliary CAN receiving device 31, and a control terminal of the buffer 4 is connected to a second control signal output terminal of the IO controller 213. The transceiving processing module 211 sends a second communication control instruction to the IO controller 213, and after receiving the instruction, the IO controller 213 controls the buffer 4 by outputting a corresponding level signal to the control terminal of the buffer 4, thereby realizing communication disconnection and connection control between the functional subsystem 3 and the CAN transceiver 1.
In one embodiment, the transceiver processing module 211 is a microcontroller.
Further, the receiving processing module 311 is a microcontroller.
It should be noted that the transceiving processing module 211 and the receiving processing module 311 are not limited to a microcontroller.
With reference to fig. 2, as a modification of the above scheme, the MCU subsystem 2 further includes a first data processing module 22, and the functional subsystem 3 further includes a second data processing module 32;
the output end of the CAN transceiver 1 is connected to the CAN transceiver 21 and the auxiliary CAN receiver 31, and specifically includes: the output end of the CAN transceiver 1 is respectively connected with the first input end of the CAN transceiver 21 and the input end of the auxiliary CAN receiver 31;
a first output end of the CAN transceiver 21 is connected with an input end of the first data processing module 22;
the output of the auxiliary CAN receiver 31 is connected to the input of the second data processing module 32.
Specifically, each subsystem is provided with at least one data processing module for processing received data, the MCU subsystem 2 includes a first data processing module 22, the functional subsystem 3 includes a second data processing module 32, a first output terminal of the CAN transceiver 21 is connected to an input terminal of the first data processing module 22, and an output terminal of the auxiliary CAN receiver 31 is connected to an input terminal of the second data processing module 32. The CAN transceiver 21 transmits data to the first data processing module 22 through its own first output end and performs data processing by the first data processing module 22, and the auxiliary CAN receiver 31 transmits data to the second data processing module 32 of the subsystem where the auxiliary CAN receiver 31 is located through its own output end and performs data processing.
Further, the CAN transceiver 21 includes a first CAN controller 212 and a transceiver processing module 211, and a first input end of the CAN transceiver 21 is a first input end of the first CAN controller 212, and a first output end of the CAN transceiver 21 is a first output end of the transceiver processing module 211, and the specific connection relationship CAN refer to fig. 2.
Further, the auxiliary CAN receiver 31 includes a second CAN controller 312 and a receiving processing module 311, an input end of the auxiliary CAN receiver 31 is an input end of the second CAN controller 312, and an output end of the auxiliary CAN receiver 31 is an output end of the receiving processing module 311, and a specific connection relationship CAN refer to fig. 2.
With reference to fig. 2, as an improvement of the above scheme, an output end of the second data processing module 32 is connected to a communication interface of the functional subsystem 3, a communication interface of the functional subsystem 3 is connected to a communication interface of the MCU subsystem 2, a communication interface of the MCU subsystem 2 is connected to a second input end of the CAN transceiver 21, a second output end of the CAN transceiver 21 is connected to an input end of the CAN transceiver 1, and an input/output end of the CAN transceiver 1 is configured to output a signal to an external CAN network.
Specifically, each subsystem (the functional subsystem 3 and the MCU subsystem 2) is provided with a communication interface, each subsystem realizes information interaction between the subsystems by connecting the communication interface to an intra-domain bus, the intra-domain bus has a communication unit and a protocol processing unit that encapsulates function calls or notifications and events into messages, and different functional subsystems 3 can perform service or function interface calls with each other. The output end of the second data processing module 32 is connected with the communication interface of the functional sub-module where the second data processing module is located, the communication interface is connected to an intra-domain bus and connected with the communication interface of the MCU subsystem 2 through the intra-domain bus, the communication interface of the MCU subsystem 2 is connected with the second input end of the CAN transceiver 21, the second output end of the CAN transceiver 21 is connected with the input end of the CAN transceiver 1, and the input and output end of the CAN transceiver 1 is connected with the CAN bus and used for transmitting data to an external CAN network.
Further, referring to fig. 2, an output terminal of the first data processing module 22 is connected to a third input terminal of the CAN transceiver 21.
Further, the CAN transceiver 21 includes a transceiver processing module 211 and a first CAN controller 212, a second input end of the CAN transceiver 21 is a second input end of the transceiver processing module 211, a third input end of the CAN transceiver 21 is a third input end of the transceiver processing module 211, and a second output end of the CAN transceiver 21 is a second output end of the first CAN controller 212, and the specific connection relationship CAN refer to fig. 2.
It should be noted that, in another embodiment, the data processing function of the first data processing module and the function of the transceiving processing module for receiving/transmitting the CAN information may be integrated in the same chip, that is, optionally, the transceiving processing module has both the data receiving/transmitting function and the data processing function, and performs data processing on the data transmitted by the first CAN controller after receiving the data.
To more clearly illustrate the working principle of the present system, a specific data processing flow is described below with reference to fig. 2:
the CAN transceiver 1 receives CAN signals from a CAN bus (external CAN network) and sends the CAN signals to the CAN transceiver 21 and the buffer 4, the CAN signals are sent to the auxiliary CAN receiving device 31 through the buffer 4, a first CAN controller 212 in the CAN transceiver 21 selectively filters part of the CAN signals, a transceiving processing module 211 in the CAN transceiver 21 receives the screened CAN signals, and the transceiving processing module 211 sends the received CAN signals to an application program in the MCU subsystem 2 for processing so as to obtain a processing result; when the application in the MCU subsystem 2 needs to send a message to the outside, the message is sent to the transceiving processing module 211 of the CAN transceiving device 21, the transceiving processing module 211 sends the message to the first CAN controller 212, the first CAN controller 212 sends the message received from the transceiving processing module 211 to the CAN transceiver 1, and finally the CAN transceiver 1 converts the message and sends the message to the outside CAN network; the second controller in the auxiliary CAN receiving device 31 selectively filters part of the CAN information, the receiving processing module 311 receives the filtered CAN signal, and the receiving processing module 311 sends the received CAN signal to the application program of the subsystem where the signal is located for processing, so as to obtain a corresponding processing result. When an application in the functional subsystem 3 needs to send a message, a communication driver of the functional subsystem 3 is called to send related data to an intra-domain bus through a communication interface of a system where the functional subsystem is located, the MCU subsystem 2 sends the data to a transceiving processing module 211 (the data of the functional subsystem is obtained by calling the communication driver and CAN message sending service), the transceiving processing module 211 sends the data to a first CAN controller 212, the first CAN controller 212 sends the data received from the transceiving processing module 211 to a CAN transceiver 1, and finally the CAN transceiver 1 converts the data (level signals) into differential signals and sends the differential signals to an external CAN network, so that the function that the information of the functional subsystem 3 sends the data to the outside through the MCU subsystem 2 is realized.
To sum up, the CAN information processing system provided by the embodiment of the present invention includes a CAN transceiver 1, an MCU subsystem 2 and at least one functional subsystem 3, where the MCU subsystem 2 includes a CAN transceiver 21, and the functional subsystem 3 includes an auxiliary CAN receiver 31; the input and output ends of the CAN transceiver 1 are used for receiving external CAN network information, and the output end of the CAN transceiver 1 is respectively connected with the CAN transceiver 21 and the auxiliary CAN receiving device 31; the CAN information processing system CAN support the parallel receiving of the external CAN network information through the CAN transmitting and receiving device 21 and the auxiliary CAN receiving device 31, and improves the data receiving performance of the CAN information processing system.
The above description is only an alternative embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (8)
1. A CAN information processing system is characterized by comprising a CAN transceiver, an MCU subsystem and at least one functional subsystem, wherein the MCU subsystem comprises a CAN transceiver device, and the functional subsystem comprises an auxiliary CAN receiving device;
the input and output ends of the CAN transceiver are used for receiving external CAN network information, and the output end of the CAN transceiver is connected with the CAN transceiver and the auxiliary CAN receiving device respectively.
2. The CAN information processing system of claim 1 wherein the CAN transceiver comprises a transceiver processing module and a first CAN controller, the CAN transceiver being coupled to the CAN transceiver by:
the output end of the CAN transceiver is connected with the first input end of the first CAN controller, and the first output end of the first CAN controller is connected with the first input end of the transceiving processing module.
3. The CAN information processing system of claim 1 wherein the auxiliary CAN receiver device comprises a receive processing module and a second CAN controller, the CAN transceiver and the auxiliary CAN receiver device being connected by:
the output end of the CAN transceiver is connected with the input end of the second CAN controller, and the output end of the second CAN controller is connected with the input end of the receiving processing module.
4. The CAN information processing system of claim 2, wherein the CAN transceiver further comprises an IO controller, the control signal output terminal of the transceiver processing module is connected to the control signal input terminal of the IO controller, and the first control signal output terminal of the IO controller is connected to the control terminal of the CAN transceiver.
5. The CAN information processing system of claim 4 further comprising a buffer, an input of the buffer being connected to an output of the CAN transceiver, an output of the buffer being connected to the auxiliary CAN receiver, a control terminal of the buffer being connected to the second control signal output of the IO controller.
6. The CAN information processing system of claim 2 wherein the transceiver processing module is a microcontroller.
7. The CAN information processing system of claim 1 wherein the MCU subsystem further comprises a first data processing module, the functional subsystem further comprises a second data processing module;
then the output of the CAN transceiver respectively with CAN transceiver, supplementary CAN receiving arrangement connects, specifically includes: the output end of the CAN transceiver is respectively connected with the first input end of the CAN transceiver and the input end of the auxiliary CAN receiving device;
a first output end of the CAN transceiver is connected with an input end of the first data processing module;
and the output end of the auxiliary CAN receiving device is connected with the input end of the second data processing module.
8. The CAN information processing system of claim 7, wherein an output terminal of the second data processing module is connected to a communication interface provided in the functional subsystem, the communication interface of the functional subsystem is connected to a communication interface provided in the MCU subsystem, the communication interface of the MCU subsystem is connected to a second input terminal of the CAN transceiver, the second output terminal of the CAN transceiver is connected to an input terminal of the CAN transceiver, and an input/output terminal of the CAN transceiver is configured to output a signal to an external CAN network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202220452976.2U CN216981921U (en) | 2022-03-02 | 2022-03-02 | CAN information processing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220452976.2U CN216981921U (en) | 2022-03-02 | 2022-03-02 | CAN information processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114584419A (en) * | 2022-03-02 | 2022-06-03 | 星河智联汽车科技有限公司 | CAN information processing system |
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- 2022-03-02 CN CN202220452976.2U patent/CN216981921U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114584419A (en) * | 2022-03-02 | 2022-06-03 | 星河智联汽车科技有限公司 | CAN information processing system |
| CN114584419B (en) * | 2022-03-02 | 2024-06-25 | 星河智联汽车科技有限公司 | CAN information processing system |
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