CN201813396U

CN201813396U - CANopen-CAN (controller area network) gateway

Info

Publication number: CN201813396U
Application number: CN2010205646864U
Authority: CN
Inventors: 李时智; 吴涛; 石勇
Original assignee: CNR Dalian Electric Traction R& D Center Co Ltd
Current assignee: CRRC Dalian R&D Co Ltd
Priority date: 2010-10-14
Filing date: 2010-10-14
Publication date: 2011-04-27
Anticipated expiration: 2020-10-14

Abstract

The utility model discloses a CANopen-CAN (controller area network) gateway, which comprises a main controller module, a CANopen interface module, a CAN interface module and a power supply unit. The main controller module is respectively connected with the CANopen interface module and the CAN interface module through an internal bus and is also respectively connected with an SD (secure digital) card interface module and a USB (universal serial bus) interface module through an internal bus. The USB interface module adopts an embedded USB interface device SL811HST. The utility model enriches external interfaces of the CANopen-CAN gateway, and provides the USB interface and the SD card interface to monitor and record data, and the development and commissioning personnel can record the data into an SD card via the SD card interface and promptly monitor the data via the USB interface. Therefore, the utility model can help the commissioning personnel to monitor the data and greatly improve the efficiency of the field commissioning personnel.

Description

A kind of CANopen-CAN gateway

Technical field

The utility model relates to a kind of network data exchange tool, particularly a kind of CANopen-CAN gateway.

Background technology

The CANopen network is a kind of network that designs for industrial field bus specially, become at present a kind of abroad with the high reliability fieldbus networks of domestic a large amount of uses, but because professional too strong, external interface also is not convenient especially, often needs could communicate by letter with controlled device through gateway.

The CANopen-CAN gateway is with the data exchange tool that meets the CANopen network technology of CIA (CAN in Automation) standard and interface is simple, cheap, the debugging convenient and the CAN fieldbus of dependable performance combines, have modern design, high reliability, high flexibility and characteristics with low cost, have wide practical use at industrial circles such as urban light rail, subway and automobiles.But the CANopen-CAN gateway peripheral interface of current use is not very abundant, does not have the interface of other assistant adjustments and record data.Field adjustable and use very inconvenience must the professional and technical personnel be with the simulator just can monitor data, thus develop a kind of have enrich that interface is convenient to debug and the CANopen-CAN gateway that uses is not only complied with development trend but also have very strong practicality.

Summary of the invention

For solving the problems referred to above that prior art exists, the utility model will design a kind of CANopen-CAN gateway with record and function for monitoring.

To achieve these goals, the technical solution of the utility model is as follows: a kind of CANopen-CAN gateway, comprise main controller module, CANopen interface module, CAN interface module and power supply unit, described main controller module is connected with the CAN interface module with the CANopen interface module respectively by internal bus, and described main controller module also is connected with usb interface module with the SD card interface module by internal bus respectively.

SD card interface module described in the utility model links to each other with main controller module by the SPI mouth; Described usb interface module adopts embedded USB interface device SL811HST, and the master/slave controller of this device internal USB is supported at full speed and the low speed data transmission, can discern low speed or full speed equipment automatically.

Main controller module described in the utility model comprises the AT91SAM7A3 chip.

Compared with prior art, the utlity model has following beneficial effect:

1, because the utility model has enriched the peripheral interface of CANopen-CAN gateway, provide USB interface and SD card to be used for monitoring and record data, exploitation and commissioning staff can be by the SD card record data of CANopen-CAN gateway to the SD cards, by the real-time monitor data of USB interface, make things convenient for commissioning staff's monitor data, improved field adjustable personnel's efficient greatly.

2, the utility model has changed the present situation that only has the single communication function of traditional C ANopen-CAN gateway, and it is that equipment software upgrading has been laid good basis that abundant interface is provided, and extensibility is very strong.

3, the research staff can obtain the historical data on the network by reading the data on the SD card, can pinpoint the problems by the analysis of historical data, improves the stability of equipment.

Description of drawings

The utility model is 1 of drawings attached only, wherein:

Fig. 1 is CANopen-CAN gateway figure.

Among the figure: 1, main controller module, 2, the SD card interface module, 3, usb interface module, 4, the CANopen interface module, 5, power supply unit, 6, the CAN interface module.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further.As shown in Figure 1, a kind of CANopen-CAN gateway, comprise main controller module 1, CANopen interface module 4, CAN interface module 6 and power supply unit 5, described main controller module 1 is connected with CAN interface module 6 with CANopen interface module 4 respectively by internal bus, and described main controller module 1 also is connected with usb interface module 3 with SD card interface module 2 by internal bus respectively.Described SD card interface module 2 links to each other with main controller module 1 by the SPI mouth; Described usb interface module 3 adopts embedded USB interface device SL811HST, and the master/slave controller of this device internal USB is supported at full speed and the low speed data transmission, can discern low speed or full speed equipment automatically.Described main controller module 1 comprises the AT91SAM7A3 chip.

Operation principle of the present utility model is as follows:

Main controller module 1 is the core of whole gateway, and it is made up of two parts: i.e. hardware and Control Software.The effect of hardware mainly is a work schedule of being responsible for control CANopen protocol controller chip, and the generation of CANopen data flow, will be responsible for also that simultaneously monitoring voltage, dongle, working power provide etc.; The effect of software is according to the The field requirement, the work schedule of control CANopen agreement control chip, the CANopen data are handled, are transferred to usb interface module 3 in main controller module 1, and SD is sticked into data confession developer analysis on the capable write operation record network.

SD card interface module 2 is connected with main controller module 1 by the SPI mouth, and main controller module 1 also provides existence and the write-protect function that additional pin is come test card in addition.Under the spi bus pattern, CS is the chip selection signal that main controller module 1 sends to the SD card, SCLK is the clock signal that main controller module 1 sends to the SD card, DI (Data In) is the one-way data signal that main controller module 1 sends to the SD card, and DO (Data Out) is the one-way data signal that the SD card sends to main controller module 1.Select the SD pattern communication to realize high-speed communication. adopt the GPIO interface to satisfy specific SD specification protocol.

Usb interface module 3 uses the SL811HST chip, include the master/slave controller of USB, support (full-speed)/low speed (low-speed) transfer of data at full speed, and can discern low speed or full speed equipment automatically, the interface that the SL811HST chip is provided can link to each other with DSP with microcontroller.In addition, the SL811HST chip internal has the RAM of one 256 byte, can be used as control register or data buffer.

CANopen interface module 4 is physical interfaces of CANopen network, and it is made up of two parts: i.e. CANopen bus transceiver and photoelectric isolating device.Photoelectric isolating device is the external circuit signal of CANopen network to be isolated through light send into bus transceiver, and perhaps the signal with bus transceiver send CANopen network through optical isolator spare.The CANopen bus transceiver is the electric interfaces of CANopen protocol controller and high-frequency isolation transformer, the digital signal that it sends protocol controller here converts differential signal to, then this signal is delivered to photoelectric isolating device, the differential networks signal decoding of perhaps photoelectric isolating device being sent here becomes digital signal, sends into protocol controller.

Power supply unit 5 comprises the power supply chip and the protective circuit of several grades, is responsible for the power supply of whole system.The electric pressure that produces comprise isolation+5V voltage ,+3.3V voltage and+2.5V voltage.

CAN interface module 6 is demodulated to the data flow of CAN controller with the external bus signal, handles for controller, or the CAN signal that controller generates is delivered to CAN bus physical interface generates the signal that meets the CAN communication and communicate by letter with the external world.

Claims

1. CANopen-CAN gateway, comprise main controller module (1), CANopen interface module (4), CAN interface module (6) and power supply unit (5), described main controller module (1) is connected with CAN interface module (6) with CANopen interface module (4) respectively by internal bus, it is characterized in that: described main controller module (1) also is connected with usb interface module (3) with SD card interface module (2) by internal bus respectively.

2. a kind of CANopen-CAN gateway according to claim 1 is characterized in that: described SD card interface module (2) links to each other with main controller module (1) by the SPI mouth; Described usb interface module (3) adopts embedded USB interface device SL811HST, and the master/slave controller of this device internal USB is supported at full speed and the low speed data transmission, can discern low speed or full speed equipment automatically.

3. a kind of CANopen-CAN gateway according to claim 1 is characterized in that: described main controller module (1) comprises the AT91SAM7A3 chip.