CN202939601U

CN202939601U - CAN (Controller Area Network) bus test board

Info

Publication number: CN202939601U
Application number: CN2012206222030U
Authority: CN
Inventors: 颜军; 蒋晓华; 黄小虎; 叶振荣; 龚永红; 唐芳福
Original assignee: ZHUHAI ORBITA CONTROL ENGINEERING Co Ltd
Current assignee: ZHUHAI ORBITA CONTROL ENGINEERING Co Ltd
Priority date: 2012-11-21
Filing date: 2012-11-21
Publication date: 2013-05-15
Anticipated expiration: 2022-11-21

Abstract

The utility model relates to a CAN (Controller Area Network) bus test board, which is characterized by comprising a USB (Universal Serial Bus) driver module, a CAN level conversion module, and a data processing module, wherein the USB driver module is provided with a USB interface connected with a USB bus of an upper computer, and used for implementing data exchange between a detection software of the upper computer and the data processing module; the CAN level conversion module is used for converting a level to implement data exchange between the data processing module and the CAN bus; and the data processing module is connected with the USB driver module and the CAN level conversion module, receives a control instruction from the detection software and transmits detection data to the CAN bus, then receives feedback data from the CAN bus for analytic operation to obtain a detection result, and then sends the detection result to the detection software of the upper computer. The CAN bus test board has the advantages of being relatively small in size and weight and convenient to use.

Description

A kind of CAN bus test plate

[technical field]

The utility model relates to a kind of CAN bus test plate, be specifically related to a kind of can be for detection of the CAN bus test plate of CAN bus protocol and CAN bus termination functions of the equipments.

[background technology]

Nowadays, the CAN bus has been widely applied to automotive field, has also released many products based on the CAN bus.Utilization and development along with the CAN bus, people are in the urgent need to a kind of testing tool that can detect CAN bus and CAN bus termination equipment, to improve the operation efficiency of CAN bus, but great majority all are based on the bus socket such as CPCI, PXI, ISA, PCI and host computer carries out communication.And CPCI, PXI, their bus slot such as ISA, PCI are all strips, take up room relative with weight large.

[utility model content]

The technical problems to be solved in the utility model is to provide a kind of CAN bus test plate, its volume and weight less and easy to use.

Above-mentioned technical matters solves by the following technical programs:

A kind of CAN bus test plate, is characterized in that, comprising:

The USB driver module, it is provided with the USB interface be connected with the usb bus of host computer, for realizing detection software and the data processing module of being located at host computer, carries out exchanges data;

The CAN level switch module, will convert from the data level of CAN bus the data level that data processing module can be identified to, or, will convert from the data level of data processing module the data level that the CAN bus can be identified to;

Data processing module, it connects USB driver module, CAN level switch module, reception is from the steering order that detects software and send the detection data to the CAN bus, then receive feedback data and carry out analytic operation to draw testing result from the CAN bus, then testing result being sent to the detection software of host computer.

Described USB driver module comprises that interconnective USB interface and USB interface drive chip, and USB interface drives chip to be connected with data processing module.

It is the ISP1582 chip that USB interface drives the model of chip.

Also comprise: program storage block, it is connected with data processing module, for storing the system program of CAN bus test plate; Data memory module, it is connected with data processing module, for preserving operational data.

Program storage block employing capacity is the FLASH chip that 1M, model are SST39LFS00A, and data memory module employing capacity is the sram chip that 1M, model are IS62WV51216BLL-55TI.

Data processing module adopts fpga chip, the built-in interconnective S698 processor cores of fpga chip and bus protocol kernel; The S698 processor cores completes the data operation processing capacity and controls function; The bus protocol kernel is provided with the CAN bus protocol, completes the mutual conversion to usb bus protocol data and CAN bus protocol data, realizes the communication between data processing module and CAN bus.

The model of described fpga chip is EP3C25F324.

As seen from the above technical solution, the utility model connects host computer by the USB driver module that is provided with USB interface, take full advantage of the convenience of usb bus, the characteristics of plug and play, the volume and weight less, be easy to carry, make with the attended operation of host computer simultaneously and become more for convenience, thereby be convenient to increase work efficiency; And, also relative reduce production cost.

[accompanying drawing explanation]

Fig. 1 is concrete structure block diagram of the present utility model.

[embodiment]

As shown in Figure 1, a kind of CAN bus test plate, comprise data processing module and the CAN level switch module, USB driver module, program storage block, the data memory module that are connected with data processing module.

The USB driver module comprises that interconnective USB interface and USB interface drive chip, USB interface drives chip to be connected with data processing module, USB interface is for being connected with the usb bus of the host computer that detects software, it is the middle bridge of the data double-way transmission of usb bus and data processing module that USB interface drives chip, data from usb bus drive the chip switching levels to be transferred to data processing module by USB interface, or the data of sending from data processing module drive the chip switching levels to send to usb bus by USB interface to get on; USB interface drives chip to adopt the ISP1582 chip, supports USB2.0 two kinds of patterns at a high speed/at full speed, and compatible USB1.1, provide parallel interface, is easy to realize being connected with microprocessor;

Data processing module, or/and data on the CAN bus being processed, and send to usb bus or/and on the CAN bus by the data after processing for receiving from usb bus; The fpga chip that its model that adopts ALTERA company is EP3C25F324, the built-in interconnective S698 processor cores of fpga chip and bus protocol kernel; The S698 processor cores completes the data operation processing capacity and controls function; The bus protocol kernel is provided with the CAN bus protocol, completes the mutual conversion to usb bus protocol data and CAN bus protocol data, realizes the communication between data processing module and CAN bus;

Program storage block, for storing the system program of CAN bus test plate, it adopts capacity is the FLASH chip that 1M, model are SST39LF800A;

Data memory module, for preserving operational data, the employing capacity is the sram chip that 1M, model are IS62WV51216BLL-55TI.

The application example of above-mentioned CAN bus test plate:

Be connected with the usb bus of the host computer that detects software by the USB interface of USB driver module, by the CAN level switch module, connect the CAN bus; Start host computer and CAN bus test plate, the instruction of PC control CAN bus test plate output detections is given to the CAN bus, CAN bus test plate receives feedback data from the CAN bus, and carry out operational analysis to draw testing result by data processing module reception data, and feedback is given to host computer, thereby complete, detect CAN bus protocol and CAN bus apparatus function.

The utility model is not limited to above-described embodiment, based on above-described embodiment, simple replacement that do not make creative work, should belong to the scope that the utility model discloses.

Claims

1. a CAN bus test plate, is characterized in that, comprising:

2. a kind of CAN bus test plate according to claim 1, is characterized in that, described USB driver module comprises that interconnective USB interface and USB interface drive chip, and USB interface drives chip to be connected with data processing module.

3. a kind of 1553B bus test plate according to claim 2, is characterized in that, it is the ISP1582 chip that USB interface drives the model of chip.

4. a kind of CAN bus test plate according to claim 1, is characterized in that, also comprises:

Program storage block, it is connected with data processing module, for storing the system program of CAN bus test plate;

Data memory module, it is connected with data processing module, for preserving operational data.

5. a kind of CAN bus test plate according to claim 4, it is characterized in that, program storage block employing capacity is the FLASH chip that 1M, model are SST39LF800A, and data memory module employing capacity is the sram chip that 1M, model are IS62WV51216BLL-55TI.

6. a kind of CAN bus test plate according to claim 1, is characterized in that, data processing module adopts fpga chip, the built-in interconnective S698 processor cores of fpga chip and bus protocol kernel; The S698 processor cores completes the data operation processing capacity and controls function; The bus protocol kernel is provided with the CAN bus protocol, completes the mutual conversion to usb bus protocol data and CAN bus protocol data, realizes the communication between data processing module and CAN bus.

7. a kind of CAN bus test plate according to claim 6, is characterized in that, the model of described fpga chip is EP3C25F324.