CN210536667U

CN210536667U - Vehicle CANFD communication system and vehicle electronic equipment

Info

Publication number: CN210536667U
Application number: CN201922455087.2U
Authority: CN
Inventors: 聂超; 江子荣
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-15
Anticipated expiration: 2029-12-30

Abstract

The embodiment of the utility model provides a vehicle CANFD communication system and vehicle electronic equipment belongs to vehicle bus communication field. The vehicle CAN FD communication system is applied to communication among a plurality of electronic control units of a vehicle, each electronic control unit comprises a micro control unit, and the vehicle CAN FD communication system comprises: each CAN FD communication module is connected with a corresponding micro control unit and is used for converting CAN FD signals on the CAN bus into data streams and exchanging data with the corresponding micro control unit. The utility model discloses an increase CANFD communication module and realize CANFD communication function between CAN bus and little the control unit MCU, need not to change MCU, need not redesign integrated circuit, practice thrift the hardware cost of changing MCU and bringing, avoid changing the problem of the hardware development cycle length that MCU brought.

Description

Vehicle CANFD communication system and vehicle electronic equipment

Technical Field

The utility model relates to a vehicle bus communication field specifically relates to a vehicle CANFD communication system and a vehicle electronic equipment.

Background

Along with the rapid development of the industries such as electronics, semiconductors, communications and the like, the intelligent appeal of automobile electronics is stronger and stronger, and more electronic Control units (ecus) are added to automobile Control, such as a Battery Management System (BMS), an Electronic Stability Program (ESP), a keyless entry and start system (PEPS), an Electronic Power Steering (EPS), an intelligent air conditioning Control system (HVAC) and the like. As the communication Data volume between the ECUs increases, the load of the controller Area network CAN (controller Area network) bus becomes higher and higher, and in order to reduce the communication load and increase the communication Rate, the application requirement of the controller Area network CAN fd (CAN with Flexible Data-Rate) with variable Rate is proposed. The MCU is used as a control core of the ECU, the MCU is directly replaced by the MCU with a CANFD function to realize the CANFD communication function, but an integrated circuit needs to be redesigned, the interface circuit is changed greatly, the design verification time is long, and the cost is very high.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a vehicle CANFD communication system to realize the CANFD communication function between a plurality of electronic control unit ECU.

In order to achieve the above object, an embodiment of the present invention provides a vehicle can fd communication system, which is applied to communication between a plurality of electronic control units of a vehicle, each electronic control unit includes a micro control unit, and the vehicle can fd communication system includes: each CAN FD communication module is connected with a corresponding micro control unit and is used for converting CAN FD signals on the CAN bus into data streams and exchanging data with the corresponding micro control unit.

Further, the CAN FD communication module includes a CAN controller and a CAN transceiver, the CAN controller exchanges data with the micro control unit, and the CAN transceiver receives signals of the CAN bus or transmits signals to the CAN bus.

Further, the CAN controller exchanges data with the micro control unit through an SPI serial peripheral interface.

Further, the CANFD communication module further comprises an isolation circuit, and the isolation circuit is connected in series between the CAN controller and the CAN transceiver.

Further, the vehicle CANFD communication system further includes: the CANFDIF module is used for calling the CANFD driving module to drive the CANFD communication module.

Further, the CANFD communication module is a CANFD chip with a model number of TCAN 4550.

On the other hand, the utility model also provides a vehicle electronic equipment disposes foretell vehicle CANFD communication system.

The embodiment of the utility model provides a realize CANFD communication function through increasing CANFD communication module between CAN bus and little the control unit MCU, need not to change MCU, need not redesign integrated circuit, practice thrift the hardware cost that changes MCU and bring, avoid changing the problem of the hardware development cycle length that MCU brought.

Furthermore, the embodiment of the utility model provides a still increase CANFDIF module and CANFD drive module, call CANFD drive module through CANFDIF module and drive CANFD communication module, do not destroy the original framework integrality of AUTOSAR and newly increase CANFD's communication function under the condition of CAN communication function availability in guaranteeing original MCU to CAN guarantee the stable transmission of CAN message.

Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:

fig. 1 is a block diagram of a CANFD communication system of a vehicle provided in embodiment 1 of the present invention;

fig. 2 is a block diagram of a vehicle CANFD communication system based on the automotive architecture provided in embodiment 2 of the present invention.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.

Example 1

Fig. 1 is a block diagram of a CANFD communication system of a vehicle provided in embodiment 1 of the present invention. As shown in fig. 1, the present embodiment provides a CANFD communication system for a vehicle, which is applied to communication among a plurality of electronic control units ECUs of the vehicle, wherein each electronic control unit ECU includes a micro control unit MCU. The vehicle CAN FD communication system includes: each CAN FD communication module is connected with a corresponding micro control unit and is used for converting CAN FD signals on the CAN bus into data streams and exchanging data with a corresponding micro control unit MCU. The CAN FD communication module comprises a CAN controller and a CAN transceiver, the CAN controller exchanges data with the micro control unit, and the CAN transceiver receives signals of the CAN bus or sends signals to the CAN bus.

In this embodiment, the CAN fd communication module further includes an isolation circuit, and the isolation circuit is connected in series between the CAN controller and the CAN transceiver. And the CAN controller exchanges data with the MCU through an SPI serial peripheral interface. The CAN transceiver receives a differential signal sent by the CAN bus and converts the differential signal into a logic signal (digital signal) to be transmitted to the CAN controller, and the CAN controller transmits the logic signal to the MCU through the SPI serial peripheral interface; logic signals sent by the MCU are transmitted to the CAN controller through the SPI serial peripheral interface and transmitted to the CAN transceiver through the CAN controller, and the CAN transceiver converts the logic signals into differential signals and sends the differential signals to the CAN bus. The CANFD communication module converts a CANFD signal on the CAN bus into a data stream, and exchanges data with the MCU in an SPI communication mode. In this embodiment, the CANFD communication module adopts a CANFD chip of a TCAN4550 model, and the chip integrates a controller and a transceiver using a flexible data rate controller local area network (CANFD), so as to meet the requirements of a vehicle-mounted network for high bandwidth and data rate flexibility.

Example 2

In order to meet the international standard safety level requirement, an automobile Electronic Control Unit (ECU) is designed based on an automobile Open System architecture (AUTOSAR) (automatic Open System architecture). Fig. 2 is a block diagram of a vehicle CANFD communication system based on the automotive architecture provided in embodiment 2 of the present invention. The vehicle CANFD communication system based on the automotive open system architecture provided in embodiment 2, on the basis of the technical solution of embodiment 1, further includes a CANFD dif module and a CANFD driving module, where the CANFD dif module is configured to invoke the CANFD driving module to drive the CANFD communication module. Because original CAN communication system adopts the CANIF module to call corresponding drive module, the embodiment of the utility model provides an adopt CANFDIF module to replace original CANIF module, route path through CANFDIF module change message, switch the message from route destination CANIF module to behind the CANFDIF module, call CANFD drive module drive CANFD communication module, carry out data exchange with little the control unit MCU with SPI communication mode, do not destroy the original framework integrality of AUTOSAR and under the circumstances of guaranteeing CAN communication function availability in original MCU newly increase CANFD's communication function.

The utility model discloses the embodiment still provides a vehicle electronic equipment, disposes foretell vehicle CANFD communication system or vehicle CANFD communication system based on AUTOSAR framework.

The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

In addition, various different implementation manners of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should be considered as the disclosure of the embodiments of the present invention.

Claims

1. A vehicle CANFD communication system for communication between a plurality of electronic control units of a vehicle, each electronic control unit including a micro control unit, the vehicle CANFD communication system comprising:

a CAN bus; and

each CAN FD communication module is connected with a corresponding micro control unit and is used for converting CAN FD signals on the CAN bus into data streams and exchanging data with the corresponding micro control unit.

2. The vehicle CAN fd communication system of claim 1, wherein the CAN fd communication module comprises a CAN controller and a CAN transceiver, the CAN controller exchanges data with the micro-control unit, and receives signals from or transmits signals to the CAN bus via the CAN transceiver.

3. The vehicle CAN fd communication system of claim 2, wherein the CAN controller exchanges data with the micro control unit over an SPI serial peripheral interface.

4. The vehicle CAN fd communication system of claim 2, wherein the CAN fd communication module further comprises an isolation circuit connected in series between the CAN controller and the CAN transceiver.

5. The vehicle CANFD communication system of claim 2, further comprising: the CANFDIF module is used for calling the CANFD driving module to drive the CANFD communication module.

6. The vehicle CANFD communication system of claim 1, wherein the CANFD communication module is a CANFD chip model TCAN 4550.

7. A vehicle electronic device, characterized in that it is equipped with the vehicle CANFD communication system of any of claims 1-6.