CN201312320Y - USB interface type CANOPEN network data analyzer - Google Patents
USB interface type CANOPEN network data analyzer Download PDFInfo
- Publication number
- CN201312320Y CN201312320Y CNU2008202312972U CN200820231297U CN201312320Y CN 201312320 Y CN201312320 Y CN 201312320Y CN U2008202312972 U CNU2008202312972 U CN U2008202312972U CN 200820231297 U CN200820231297 U CN 200820231297U CN 201312320 Y CN201312320 Y CN 201312320Y
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- transceiver
- usb interface
- control chip
- bus
- at91sm7a3
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Abstract
The utility model discloses a USB interface type CANOPEN network data analyzer, comprising a CAN transceiver, a master control chip AT91SM7A3, a USB interface circuit and a power supply unit. An input terminal of the CAN transceiver is connected with a CAN bus, an output end of the CAN transceiver is connected with a serial data output line TX and a serial data input line RX of the master control chip AT91SM7A3. An input terminal of the USB interface circuit is connected with a USB interface of the master control chip AT91SM7A3, and an output terminal of the USB interface circuit is connected with a USB bus. The CAN transceiver is a PCA82C250 transceiver, and is connected between the CAN bus and the master control chip AT91SM7A3 in an inner bus mode. The CAN bus is characterized by strong practicality, thus CAN has been widely used in car industry, aviation industry, industrial control field, safety protection filed and the like.
Description
Technical field
The utility model relates to a kind of network data analyzer, relates in particular to a kind of USB interface type CANOPEN network data analyzer based on the CAN network system.
Background technology
CAN, full name are " Controller Area Network ", i.e. controller local area network is one of most widely used fieldbus in the world.CAN can provide the message transmission rate up to 1Mbit/s, and this makes real-time control become very easy.In addition, the mistake of hardware calibrating characteristic has also strengthened the anti-electromagnetic interference capability of CAN.CAN is a kind of serial communication bus of many master modes, and basic design specification requires that high bit rate is arranged, high anti-electromagnetic interference, and can detect any mistake of generation.When signal transmission distance reached 10Km, CAN still can provide the message transmission rate up to 50Kbit/s.Because the CAN bus has very high real-time performance, therefore, CAN has obtained extensive use in fields such as auto industry, aircraft industry, Industry Control, security protection.
The CAN communications protocol is mainly described the mode of intelligence transmission between the equipment.The definition of CAN layer is consistent with Open Systems Interconnection (OS worker), has defined the bottom two-layer of model: physical layer and data link layer.
The CANopen agreement is one of standard of CAN-in-Automation (CiA) definition.It is the application layer protocol of CAN.Most of important device types, for example the numeral and the simulation input/output module, driving arrangement, operating equipment, controller, Programmable Logic Controller or encoder all are described in the agreement that is called " subset of devices ".Subset of devices has defined dissimilar standard devices and function corresponding thereof.Rely on the support of CANopen protocol suite, can the equipment of different vendor be configured and system reconfiguration by bus.
Because the CAN network technology is the industry spot network technology that many in the world major companies adopt, the scope of application is extensive further, and the analysis of network data is to an important job in train debugging, maintenance, the maintenance.So a kind of being convenient to safeguards that it is exigence that the analyzer that uses in the maintenance is developed.
Summary of the invention
Therefore not only comply with development trend but also have very strong practicality based on the USB interface type CANOPEN network data analyzer of CAN network.This data analyzer can carry out analytic record to the CANOPEN data.
The utility model is achieved in that
A kind of USB interface type CANOPEN network data analyzer based on the CAN network system is characterized in that comprising CAN transceiver, main control chip AT91SM7A3, usb circuit and power supply unit; Described CAN transceiver input is connected into the CAN bus, and output is connected on the serial data output line TX and serial data incoming line RX of master control chip AT91SAM7A3; Described usb circuit input is connected the USB interface place of main control chip AT91SM7A3, and output is connected on the usb bus; The reference ground output GND of described power supply unit then links to each other with the GND pin of main control chip AT91SM7A3, does the work power supply of whole analytical system.Described CAN transceiver adopts PCA82C250 type transceiver, is connected between CAN bus and the main control chip AT91SM7A3 by the internal bus form.
The beneficial effect that the utility model had is equipment to be inserted in the CAN standard network just can finish data analysis work, and is easy for installation, simple to operate, use reliably, and be the new product that under the overall situation of Train Control networking, arises at the historic moment.
Description of drawings
The utility model has 2 width of cloth accompanying drawings:
Fig. 1 is a hardware structure diagram of the present utility model;
Fig. 2 is a CAN transceiver PCA82C250 circuit diagram of the present utility model;
Among the figure: 1CAN transceiver, 2 main control chip AT91SM7A3,3USB interface circuit, 4 power supply units.
Embodiment
USB interface type CANOPEN network data analyzer as shown in Figure 1 and Figure 2 is characterized in that comprising CAN transceiver 1, main control chip AT91SM7A3 2, usb circuit 3 and power supply unit 4; Described CAN transceiver 1 input is connected into the CAN bus, and output is connected on the serial data output line TX and serial data incoming line RX of main control chip AT91SAM7A3 2; Described usb circuit input is connected the USB interface place of main control chip AT91SM7A3 2, and output is connected on the usb bus; The reference ground output GND of described power supply unit 4 then links to each other with the GND pin of main control chip AT91SM7A32, and the feeder ear that is connected each circuit unit is each circuit unit power supply.
Described CAN transceiver 1 adopts PCA82C250 type transceiver, is connected between CAN bus and the main control chip AT91SM7A3 2 by the internal bus form.
In specific embodiment, the CAN data/address bus is connected into data-signal in the native system by CANL and the CANH pin of CAN transceiver PCA82C250; CAN transceiver PCA82C250 output imports bus signals in the main control chip AT91SAM7A3 into by being connected with serial data output line TX, the serial data incoming line RX of main control chip AT91SAM7A3; The AT91SAM7A3 master controller is the core of entire equipment, has finished the function control of data analysis.
AT91SAM7A3 is 32 a member in the ARM7 Series of MCU, is integrated with the CAN controller.256K byte high speed Flash and 32K byte SRAM and a complete set of ancillary equipment are arranged on the sheet, comprise two 2.0B CAN controllers, and a whole set of makes the functional unit of peripheral device component minimum number.The Flash memory can have programming in the JTAG-ICE interface system in the sheet in this microprocessor.Built-in locking bit can be protected firmware, prevents that it from being covered by mistake.
The Flash module is totally 1024 pages in the sheet of AT91SAM7A3, every page 256 byte.Have 65536 32 words altogether.The Flash module comprises the buffer memory of writing of one 256 byte, can be by 32 interface accessing.When Flash can not read and write or visit, it will enter standby automatically.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection range of the present utility model.
Claims (2)
1, a kind of USB interface type CANOPEN network data analyzer is characterized in that comprising CAN transceiver (1), main control chip AT91SM7A3 (2), usb circuit (3) and power supply unit (4); Described CAN transceiver (1) input is connected into the CAN bus, and output is connected on the serial data output line TX and serial data incoming line RX of main control chip AT91SAM7A3 (2); Described usb circuit input is connected the USB interface place of main control chip AT91SM7A3 (2), and output is connected on the usb bus; The reference ground output GND of described power supply unit (4) then links to each other with the GND pin of main control chip AT91SM7A3 (2), and the feeder ear that is connected each circuit unit is each circuit unit power supply.
2, USB interface type CANOPEN network data analyzer according to claim 1, its feature is that also described CAN transceiver (1) adopts PCA82C250 type transceiver, is connected between CAN bus and the main control chip AT91SM7A3 (2) by the internal bus form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202312972U CN201312320Y (en) | 2008-12-03 | 2008-12-03 | USB interface type CANOPEN network data analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202312972U CN201312320Y (en) | 2008-12-03 | 2008-12-03 | USB interface type CANOPEN network data analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201312320Y true CN201312320Y (en) | 2009-09-16 |
Family
ID=41109575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202312972U Expired - Fee Related CN201312320Y (en) | 2008-12-03 | 2008-12-03 | USB interface type CANOPEN network data analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201312320Y (en) |
-
2008
- 2008-12-03 CN CNU2008202312972U patent/CN201312320Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20111203 |