CN208094572U

CN208094572U - A kind of more CAN bus network monitor terminals based on USB

Info

Publication number: CN208094572U
Application number: CN201820316559.9U
Authority: CN
Inventors: 胡黄水; 杨兴旺; 赵航; 郑曼; 吕洪武; 王昕�
Original assignee: Changchun University of Technology
Current assignee: Changchun University of Technology
Priority date: 2018-03-08
Filing date: 2018-03-08
Publication date: 2018-11-13
Anticipated expiration: 2028-03-08

Abstract

More CAN bus network monitor terminals based on USB that the utility model is related to a kind of, the terminal uses modularized design, specifically includes main control module, ultrahigh speed CAN bus network module, high-speed CAN bus network module, low speed CAN bus network module and USB communication interface module.Master control uses STM32F107RCT6 chips, and is connect respectively with each function module by Resources on Chip.Control and management by main control module to each submodule, the terminal can be independently accessed certain ultrahigh speed, high speed or low speed CAN bus network, also certain ultrahigh speed, high speed and low speed CAN bus network can be accessed simultaneously, to realize the monitoring to accessing CAN bus network real-time transmission data.

Description

A kind of more CAN bus network monitor terminals based on USB

Technical field

The utility model is related to In-vehicle networking fields, and in particular to a kind of more CAN bus network monitors based on USB are whole The real-time monitoring to ultrahigh speed, high speed and low speed CAN bus network data is realized at end.

Background technology

With the development of automotive telematics technology, CAN bus network is since its reliability is high, real-time and design Flexibly the features such as, is widely applied.The data interaction between each electronic control unit can be completed by CAN bus network, realizes data It is shared, vehicle modular capability is considerably improved, and can flexibly automotive system be designed and be configured, the final entirety for improving automobile Performance such as dynamic property, economical and safety etc..

Each electronic control unit of automotive electronics usually has different transmission rates, to the CAN bus net for different rates Network needs to build different CAN bus subnets.Wherein power transmission subnet realizes that engine, gearbox and brake etc. are automatically controlled High-rate information transmission between unit（Transmission rate 500-1000Kbps）.Vehicle body subnet realizes the automatically controlled lists such as car light, car door, seat The low speed information transmission of member（250Kbps or less）.And Infotainment subnet realizes the superelevation of the electronic control unit such as image, steering-by-wire Fast information transmission（2000Kbps or more）.

With increasing for vehicle-mounted CAN bus subnet, how to realize that the performance of vehicle is extremely closed in the real-time monitoring to each subnet It is important.Shape is run by monitoring the electronic control unit that each subnet both will be seen that the operating status of network also was understood that on each network State, fault diagnosis, maintenance etc. for network itself and each electronic control unit provide foundation.Existing monitoring terminal usually passes through access Car borne gateway is monitored and diagnoses to each subnet of network offline, can not access each subnet in real time and carry out underlying protocol analysis, Ultrahigh speed subnet access capability is not provided yet.

Invention content

The utility model is in view of the above-mentioned problems, provide a kind of more CAN bus network monitor terminals based on USB.The terminal Ultrahigh speed, high speed and low speed CAN bus network interface are provided, certain ultrahigh speed, high speed or low speed CAN bus net can be independently accessed Network can also access certain ultrahigh speed, high speed and low speed CAN bus network, be docked into network real-time transmission data to realize simultaneously Monitoring.

In order to achieve the above objectives, technical solution used by the utility model is：Modularized design, including main control module, Ultrahigh speed CAN bus network module, high-speed CAN bus network module, low speed CAN bus network module and USB communication interface Module.Main control module uses STM32F107RCT6 chips, and is connect respectively with each function module by Resources on Chip.Master control Module can both pass through ultrahigh speed CAN bus network module, high-speed CAN bus network module and low speed CAN bus network module The data of each CAN bus subnet are obtained, and the data of acquisition are passed through into USB communication interface module transfer.Also it can pass through usb communication Interface module receives control command and to be sent to each ultrahigh speed CAN bus subnet, high-speed CAN bus subnet and low speed CAN total Line subnet.

The main control module uses STM32F107RCT6 chips, passes through SPI and ultrahigh speed CAN bus network mould respectively Block, CAN interface 2 and high-speed CAN bus network module, CAN interface 1 and low speed CAN bus network module and USB OTG interfaces It connect and is communicated with USB communication interface module, realize the acquisition, transmission and processing of related data.

The ultrahigh speed CAN bus network module by MICROCHIP companies CAN FD controllers MCP2517FD and The CAN transceiver ATA6563 compositions of MICROCHIP companies, traffic rate reach as high as 8Mbps, realize total with ultrahigh speed CAN The connection of line subnet.

The high-speed CAN bus network module by STM32F107RCT6 pieces CAN protocol controller 2 and NXP companies CAN transceiver SN65HVD230 composition, in order to improve the reliability of high-speed CAN bus network, isolation circuit is designed with, by electricity Source isolation module and photoelectric coupled circuit composition, power isolation module use the ZY0505FS of Guangzhou Zhi Yuan companies, optocoupler to use TLP113。

The low speed CAN bus network module by STM32F107RCT6 pieces CAN protocol controller 1 and NXP companies CAN transceiver SN65HVD230 composition, in order to improve the reliability of low speed CAN bus network, isolation circuit is designed with, by electricity Source isolation module and photoelectric coupled circuit composition, power isolation module use the ZY0505FS of Guangzhou Zhi Yuan companies, optocoupler to use TLP113。

The USB communication interface module is opened by the power supply of USB OTG interfaces and ST companies in STM32F107RCT6 pieces STMPS2141STR and miniUSB sockets composition is closed, USB OTG interface rates reach as high as 12Mbps, meet ultrahigh speed, height Speed and low speed CAN bus network bandwidth requirements realize the communication with USB device.

Compared with prior art, the utility model has the following advantages that：

（1）Terminal uses modularized design, on the one hand convenient to be debugged, changed and transplanted to program, while also advantageous In progress terminal capabilities maintenance in the future and Function Extension upgrading；

（2）Main control module uses STM32F107RCT6 chips, has abundant Resources on Chip, extends on its basis Superelevation, high, low speed CAN interface and USB communication interface realize the access to existing various rate CAN bus networks and prison It surveys, is connected between module simple and convenient；

（3）The utility model makes full use of the Resources on Chip of STM32F107RCT6, at low cost, performance stabilization, reliability It is high.

Description of the drawings

Fig. 1 is the utility model terminal structure block diagram.

Fig. 2 is the utility model main control module functional block diagram.

Fig. 3 is the utility model ultrahigh speed CAN bus network module functional block diagram.

Fig. 4 is the utility model high-speed CAN bus network module functional block diagram.

Fig. 5 is the utility model low speed CAN bus network module functional block diagram.

Fig. 6 is the utility model USB communication interface module principle block diagram.

Fig. 7 is the terminal works flow chart of the utility model.

Specific implementation mode

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a kind of more CAN bus network monitor terminals based on USB, including main control module, ultrahigh speed CAN are total Line network module, high-speed CAN bus network module, low speed CAN bus network module and USB communication interface module.Master control mould Block uses STM32F107RCT6 chips, and is connect respectively with each function module by Resources on Chip.Main control module both can be with It is total that each CAN is obtained by ultrahigh speed CAN bus network module, high-speed CAN bus network module and low speed CAN bus network module The data of line subnet, and the data of acquisition are passed through into USB communication interface module transfer.Also it can be connect by USB communication interface module It receives control command and is sent to each ultrahigh speed CAN bus subnet, high-speed CAN bus subnet and low speed CAN bus subnet.

The main control module use STM32F107RCT6 chips, as shown in Fig. 2, by its Resources on Chip SPI interface with Ultrahigh speed CAN bus network module connects, and is connect with high-speed CAN bus network module by piece CAN interface 2, passes through on piece CAN interface 1 is connect with low speed CAN bus network module, is connect with USB communication interface module by piece USB OTG interfaces, real The now communication between ultrahigh speed CAN bus network, high-speed CAN bus network, low speed CAN bus network and USB communication interface, And related data is obtained, transmit and is handled.Specifically by pin SPI_SCK, SPI_MISO, SPI_MOSI, SPI_NSS, PB14, PB15 and pin SCK, SDI of ultrahigh speed CAN bus module, SDO, NCS,、Electrical connection.Pass through pin USB_VBUS, USB_DM, USB_DP, USB_ID, PB9 respectively with pin VBUS, DM of USB communication interface module, DP, ID, Electrical connection.It is electrically connected respectively with pin D, R of low speed CAN bus network module by pin CAN1_TX, CAN1_RX.It is logical Pin CAN2_TX, CAN2_RX is crossed to be electrically connected with pin D, R of high-speed CAN bus network module respectively.

The ultrahigh speed CAN interface module by MICROCHIP companies CAN FD controllers MCP2517FD and The CAN transceiver ATA6563 compositions of MICROCHIP companies, as shown in Figure 3.The module is connected by SPI interface and main control module It connects, by CAN FD controllers and CAN transceiver and CAN bus network connection, realizes bidirectional data transfers.Specifically by Pin SCK, SDI of CAN FD controllers MCP2517FD, SDO, NCS,、Respectively with the pin SPI_ of main control module SCK, SPI_MISO, SPI_MOSI, SPI_NSS, PB14, PB15 are electrically connected.Pass through drawing for CAN FD controllers MCP2517FD Foot TXCAN, RXCAN are electrically connected with pin TXD, RXD of CAN transceiver ATA6563 respectively.CAN transceiver ATA6563's draws One 120 ohm of terminal resistance is bridged between foot CANH, CANL, you can access ultrahigh speed CAN bus network.

The high-speed CAN bus network module by STM32F107RCT6 pieces CAN protocol controller 2 and NXP companies CAN transceiver SN65HVD230 composition, as shown in Figure 4.In order to improve the reliability of high-speed CAN bus network, be designed with every It from circuit, is made of power isolation module and photoelectric coupled circuit, power isolation module uses the ZY0505FS of Guangzhou Zhi Yuan companies, light Coupling uses TLP113.Specially main control module passes through CAN interface on STM32F107RCT6 chip slappers 2 pin CAN2_TX, CAN2_ RX is electrically connected with photoelectrical coupler TLP113 respectively, the optocoupler pin with CAN transceiver SN65HVD230 again after isolation signals D, R is electrically connected, and one 120 ohm of terminal resistance is bridged between pin CANH, CANL of CAN transceiver SN65HVD230, It can access high-speed CAN bus network.

The low speed CAN bus network module by STM32F107RCT6 pieces CAN protocol controller 1 and NXP companies CAN transceiver SN65HVD230 composition, as shown in Figure 5.In order to improve the reliability of low speed CAN bus network, be designed with every It from circuit, is made of power isolation module and photoelectric coupled circuit, power isolation module uses the ZY0505FS of Guangzhou Zhi Yuan companies, light Coupling uses TLP113.Specially main control module passes through CAN interface on STM32F107RCT6 chip slappers 1 pin CAN1_TX, CAN1_ RX is electrically connected with photoelectrical coupler TLP113 respectively, the optocoupler pin with CAN transceiver SN65HVD230 again after isolation signals D, R is electrically connected, and one 120 ohm of terminal resistance is bridged between pin CANH, CANL of CAN transceiver SN65HVD230, It can access low speed CAN bus network.

The USB communication interface module is opened by the power supply of USB OTG interfaces and ST companies in STM32F107RCT6 pieces STMPS2141STR and general miniUSB connectors composition are closed, as shown in Figure 6.USB OTG interface rates reach as high as 12Mbps meets ultrahigh speed, high speed and low speed CAN bus network bandwidth requirements, realizes the real-time Communication for Power with USB device.Specifically For this module miniUSB connectors pin VBUS, DM, DP, ID respectively with USB_VBUS, USB_DM, USB_ of main control module DP, USB_ID are electrically connected.In order to provide power supply, the pin VBUS of the miniUSB connectors of this module for the USB device of connection It is electrically connected with the pin OUT of power switch STMPS2141STR, the pin IN terminals 5V electricity of power switch STMPS2141STR Source connects, the pin of power switch STMPS2141STRIt is electrically connected with the pin PB9 of main control module.In order to indicate that power supply is opened Whether pass works, and is designed with light emitting diode indicating circuit, when switch is opened, light emitting diode is bright, and otherwise light emitting diode goes out.

The course of work of the utility model is as shown in Figure 7.Setting command is received after the power is turned on, and judgement is monitoring ultrahigh speed CAN One, two in bus network, high-speed CAN bus network, low speed CAN bus network or whole.Monitor some CAN net Network, then the CAN network communicated with USB communication interface, both the CAN bus network data can be sent to USB interface, also might be used The order of USB interface is received, and ordered filter data to be sent to the data that the CAN bus network meets order request according to it USB interface.

Claims

1. a kind of more CAN bus network monitor terminals based on USB, it is characterised in that：Using modularized design, including master control mould Block, ultrahigh speed CAN bus network module, high-speed CAN bus network module, low speed CAN bus network module and usb communication connect Mouth mold block；Wherein main control module uses STM32F107RCT6 chips, and ultrahigh speed CAN bus network module is by CAN FD controllers MCP2517FD and CAN transceiver ATA6563 compositions, are connected with main control chip, realize the transmitting-receiving of ultrahigh speed CAN network data；It is high Fast CAN bus network module and low speed CAN bus network module are by the CAN protocol controller and CAN in STM32F107RCT6 pieces Transceiver SN65HVD230 compositions, are connected with main control module and realize the transmitting-receiving of high speed, low speed CAN network data；USB communication interface Module is by the USB OTG interface and power switch STMPS2141STR and general miniUSB sockets in STM32F107RCT6 pieces Composition realizes the communication of CAN network and USB device, to realize the monitoring docked into network real-time transmission data.

2. a kind of more CAN bus network monitor terminals based on USB according to claim 1, it is characterised in that：Master control mould Block uses STM32F107RCT6 chips, and is connect respectively with each function module by Resources on Chip；Main control module can both lead to It crosses ultrahigh speed CAN bus network module, high-speed CAN bus network module and low speed CAN bus network module and obtains each CAN bus The data of subnet, and the data of acquisition are passed through into USB communication interface module transfer；Also it can be received by USB communication interface module Control command is sent to each ultrahigh speed CAN bus subnet, high-speed CAN bus subnet and low speed CAN bus subnet.

3. a kind of more CAN bus network monitor terminals based on USB according to claim 1, it is characterised in that：Described High-speed CAN bus network module and low speed CAN bus network module are by the CAN protocol controller 2,1 in STM32F107RCT6 pieces With the CAN transceiver SN65HVD230 compositions of NXP companies, in order to improve the reliability of high-speed CAN bus network, it is designed with isolation Circuit is made of power isolation module and photoelectric coupled circuit, and power isolation module uses the ZY0505FS of Guangzhou Zhi Yuan companies, optocoupler Using TLP113.