CN201754589U

CN201754589U - ARM7-based WTB-USB gateway

Info

Publication number: CN201754589U
Application number: CN2010202847861U
Authority: CN
Inventors: 于跃; 姜悦礼; 夏福坤; 牟岩; 张晓玲
Original assignee: CNR Dalian Electric Traction R& D Center Co Ltd
Current assignee: CRRC Dalian R&D Co Ltd
Priority date: 2010-08-05
Filing date: 2010-08-05
Publication date: 2011-03-02
Anticipated expiration: 2020-08-05

Abstract

The utility model discloses an ARM7-based WTB-USB gateway, which comprises a WTB board, a USB board, a CPU board, a power board and a back board. The WTB board, the USB board and the CPU board are connected with the back board through a back board bus in a bidirectional manner, the WTB board is responsible for data acquisition and transmission of WTB bus equipment, and the USB board is responsible for data acquisition and control of the USB equipment. The working method of the gateway includes conversions of WTB bus data into USB bus data and conversion of USB bus data into WTB bus data. The ARM7-based WTB-USB gateway solves the problem of data communication between a special stranded train bus WTB and a universal USB bus, accordingly has WTB process data function, information data function and bus management function, and has USB link-layer management function and application layer function.

Description

A kind of WTB-USB gateway based on ARM7

Technical field

The utility model relates to the data conversion equipment of the Computer Communication Networks control system of railroad train, subway train and urban rail transit vehicles, particularly a kind of WTB-USB gateway based on ARM7.

Background technology

Along with the needs of railway great-leap-forward development, motor train unit trains such as CRH5, CRH2, HXD1 are used on the basic routing line at home widely, and external advanced TCN network control technology has been introduced domestic.Simultaneously the electric locomotive vehicle of China also begins to adopt successively the TCN technology, promptly solves problems such as the collection of on-the-spot all signals and control by the TCN network.

IEC61375-1 " TCN " is called for short the TCN standard, is an international standard, also is China railways industry standard TB/T3035-2002.The TCN standard definition multifunction vehicle bus MVB and two kinds of forms of wired train bus WTB, it is standard for Fieldbus for this special application field design of railway systems, it has formulated the communication system of an opening, thus make various rolling stocks can mutually interconnected extension, the equipment of different vendor can be interconnected.

Usb bus is one of fieldbus of industry spot widespread usage, and the USB2.0 standard is its international standard.The usb bus standard is followed the ISO/OSI model, has adopted physical layer wherein, data link layer, transport layer, session layer, presentation layer and application layer.Usb bus is the serial communication network of distributed control of a kind of effective support and real-time control system, has outstanding reliability, real-time and flexibility.

Because the service request of domestic third party's USB interface equipment needs by USB interface the train operation data to be sent in the networked control system of the train system, is convenient to train traffic safety and maintenance.So the WTB-USB gateway just becomes the essential key equipment of TCN network control system, make usb bus reach seamlessly and combine with the WTB network.But the present domestic WTB-USB gateway that also is not applied to the rolling stock industry with independent intellectual property right, and existing gateway based on the WTB bus can not directly use.

Summary of the invention

For solving the problems referred to above that prior art exists, the purpose of this utility model provides a kind of WTB-USB gateway based on ARM7, be mainly used in the WTB network control system of railroad train, subway train and urban track traffic industry, the network equipment that connects the usb bus interface, make it both to have WTB process data function, message data function and bus management function, also have USB link layer management function and application level function.

To achieve these goals, the technical solution of the utility model is as follows:

A kind of WTB-USB gateway based on ARM7, comprise WTB integrated circuit board, USB integrated circuit board, CPU board card, power supply integrated circuit board and backboard, described WTB integrated circuit board, USB integrated circuit board and CPU board cartoon are crossed core bus and are connected with backboard is two-way, described power panel cartoon cross power line respectively with WTB integrated circuit board, USB integrated circuit board and CPU board card connection; Described WTB integrated circuit board is responsible for the data acquisition and the transmission of WTB bus apparatus; Described USB integrated circuit board is responsible for the data acquisition and the control of USB device;

Described WTB integrated circuit board comprises MCU control circuit, FPGA encoding and decoding processor and WTB bus driver, described FPGA encoding and decoding processor is respectively with MCU control circuit, WTB bus driver with backboard is two-way is connected, described MCU control circuit is connected by core bus and backboard are two-way, and described WTB bus driver is connected with the WTB bus is two-way;

Described USB integrated circuit board comprises the usb protocol controller, and described usb protocol controller is connected with core bus and usb bus are two-way respectively;

Described CPU board card comprises central processing unit, FLASH memory, SDRAM memory, electric power management circuit, reset circuit and Nonvolatile memory cell, and described central processing unit is respectively with FLASH memory, SDRAM memory, electric power management circuit, reset circuit, Nonvolatile memory cell with backboard is two-way is connected.

Central processing unit described in the utility model is 32 ARM7 processor NET+50 chips, described MCU control circuit comprises with 8 bit processors and ESCC controller being the WTB agreement control circuit IS62C1024 chip of core, described FPGA encoding and decoding processor comprises the FPGA device, described WTB bus driver comprises RS485 protocol controller and MOSFET device, and described usb protocol controller comprises usb protocol MAX3420 chip.

WTB integrated circuit board described in the utility model, USB integrated circuit board and CPU board card are integrated on the backboard, are connected by core bus and backboard are two-way.

Compared with prior art, because the utility model is by CPU board card, WTB integrated circuit board and USB integrated circuit board composition data conversion equipment based on the ARM7 processor, solved the data communication problem of special wired train bus WTB and Universal USB bus, make the utility model both have WTB process data function, message data function and bus management function, had USB link layer management function and application level function again.The utlity model has modern design, high reliability, high flexibility and characteristics with low cost, be with a wide range of applications in rolling stock industry and association area.Of the present utility model succeeding in developing, indicate that whole WTB-USB switch technologies capture, filled up the blank in domestic this field, make the TCN network control of China technical a new step, have realistic meaning for the technological innovation of domestic rail vehicles industry.

Description of drawings

8 in the total accompanying drawing of the utility model, wherein:

Fig. 1 is a structured flowchart of the present utility model;

Fig. 2 is a WTB integrated circuit board structured flowchart of the present utility model;

Fig. 3 is a USB integrated circuit board structured flowchart of the present utility model;

Fig. 4 is a CPU board card structure block diagram of the present utility model;

Fig. 5 is ARM7 processor and peripheral circuit interface circuit figure thereof in the CPU board card of the present utility model;

Fig. 6 is the circuit connection diagram of usb protocol controller in the USB integrated circuit board of the present utility model;

Fig. 7 is the circuit connection diagram of MCU control circuit in the WTB bus integrated circuit board of the present utility model;

Fig. 8 is a network topological diagram of the present utility model.

Among the figure: 1, WTB integrated circuit board, 2, the USB integrated circuit board, 3, the CPU board card, 4, power supply integrated circuit board, 5, backboard, 6, the MCU control circuit, 7, FPGA encoding and decoding processor, 8, the WTB bus driver, 9, the usb protocol controller, 10, central processing unit, 11, FLASH memory, 12, the SDRAM memory, 13, electric power management circuit, 14, reset circuit, 15, Nonvolatile memory cell.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further.Shown in Fig. 1-8, a kind of WTB-USB gateway based on ARM7, comprise WTB integrated circuit board 1, USB integrated circuit board 2, CPU board card 3, power supply integrated circuit board 4 and backboard 5, described WTB integrated circuit board 1, USB integrated circuit board 2 and CPU board card 3 are by core bus and 5 two-way connections of backboard, and described power supply integrated circuit board 4 is connected with WTB integrated circuit board 1, USB integrated circuit board 2 and CPU board card 3 respectively by power line; Described WTB integrated circuit board 1 is responsible for the data acquisition and the transmission of WTB bus apparatus; Described USB integrated circuit board 2 is responsible for the data acquisition and the control of USB device; Described WTB integrated circuit board 1 comprises MCU control circuit 6, FPGA encoding and decoding processor 7 and WTB bus driver 8, described FPGA encoding and decoding processor 7 respectively with MCU control circuit 6,

WTB bus driver

8 and 5 two-way connections of backboard, described MCU control circuit 6 is by core bus and 5 two-way connections of backboard, and described WTB bus driver 8 is connected with the WTB bus is two-way; Described USB integrated circuit board 2 comprises usb protocol controller 9, and described usb protocol controller 9 is connected with core bus and usb bus are two-way respectively; Described CPU board card 3 comprises central processing unit 10, FLASH memory 11, SDRAM memory 12, electric power management circuit 13, reset circuit 14 and Nonvolatile memory cell 15, described central processing unit 10 respectively with FLASH memory 11, SDRAM memory 12, electric power management circuit 13, reset circuit 14,

Nonvolatile memory cell

15 and 5 two-way connections of backboard.Described central processing unit 10 is 32 ARM7 processor NET+50 chips, described MCU control circuit 6 comprises with 8 bit processors and ESCC controller being the WTB agreement control circuit IS62C1024 chip of core, described FPGA encoding and decoding processor 7 comprises the FPGA device, described WTB bus driver 8 comprises RS485 protocol controller and MOSFET device, and described usb protocol controller 9 comprises usb protocol MAX3420 chip.Described WTB integrated circuit board 1, USB integrated circuit board 2 and CPU board card 3 be integrated on the backboard 5, by core bus and 5 two-way connections of backboard.

Method of work of the present utility model comprises that the WTB bus data is converted to the usb bus data and the usb bus data are converted to the WTB bus data, specifically may further comprise the steps:

A, WTB bus data are converted to the usb bus data

WTB bus driver 8 in the WTB integrated circuit board 1 receives the device data that transmits on the WTB bus, is sent to MCU control circuit 6 through FPGA encoding and decoding processor 7; ARM7 processor NET+50 chip in the CPU board card 3 is by 16 data lines, 19 address wires and control line interlocking mechanism, the IS62C1024 chip of priority access MCU control circuit 6, and obtain device data; Usb protocol controller 9MAX3420 chip in USB integrated circuit board 2 is converted into serial data again, is sent to usb bus;

B, usb bus data are converted to the WTB bus data

Usb protocol controller 9 in the USB integrated circuit board 2 receives the device data that transmits on the usb bus, is sent to SDRAM memory 12 by the ARM7 processor of 4 serial data lines in CPU board card 3; ARM7 processor NET+50 chip is obtained the USB device data by 32 data lines and 14 address wire synchronization of access SDRAM memories 12; The USB device data flow allows through FPGA encoding and decoding processor 7 again, import MCU control circuit 6 into and be converted into HDLC form message, be sent to FPGA encoding and decoding processor 7 and generate Manchester signal, carry out the signal adjustment by WTB bus driver 8 again, be sent to the WTB bus and get on.

MCU control circuit 6 described in the utility model reads WTB process data, message data or monitoring data with inquiry mode, be converted into the HDLC message format, import into and form Manchester coded signal in the FPGA encoding and decoding processor 7, perhaps will be from Manchester coded signal of FPGA encoding and decoding processor 7, resolve to standard parallel signal data through handling, import MCU control circuit 6 into.

Be connected to core bus between each integrated circuit board of the utility model and the integrated circuit board, this core bus has been followed the external memory access bus of standard, the core bus socket is the physical structure that above-mentioned integrated circuit board is coupled together, it carries out cabling and level match with the peace of the signal between integrated circuit board according to special requirement, and the 24V external power power supply interface of whole WTB-USB gateway is provided simultaneously.5 designs of described backboard are that the core bus signal has high reliability, good flexibility energy and Scalable Performance according to the characteristics design of the on-the-spot electric circumstance of railway systems; What power supply integrated circuit board 4 adopted is the method for modularized design, and the core power module that uses is that Switzerland VACON company produces the power module chip, and purpose is that+24V voltage transitions is+5V power supply, supplies with that integrated circuit board uses in the cabinet, is a very stable power.

By the constructed WTB-USB gateway of above-mentioned four integrated circuit boards, be connected with the inner USB network equipment of train, the train information on the USB network equipment can carry out the exchange of data flow with the WTB network like this.If need more USB network in the train, just need the such equipment of a cover so in each USB network.The canonical system framework map by the WTB-USB gateway that WTB integrated circuit board 1, USB integrated circuit board 2 and CPU board card 3 are formed, connects WTB network and USB network as shown in Figure 8 simultaneously.The USB network also comprises the on-the-spot IO equipment that has USB interface.IO equipment is given USB integrated circuit board 2 with field data, generates usb data form message, is sent on other equipment on the WTB bus by CPU board card 3 and WTB integrated circuit board 1 then.Simultaneously also the data of other equipment of WTB network can be sent to IO equipment conversely.The data flow of whole system as mentioned above.Certainly, can also be with a lot of other equipment according to the requirement of USB system, such as intelligent display unit, train supervision unit etc.

Claims

1. WTB-USB gateway based on ARM7, it is characterized in that: comprise WTB integrated circuit board (1), USB integrated circuit board (2), CPU board card (3), power supply integrated circuit board (4) and backboard (5), described WTB integrated circuit board (1), USB integrated circuit board (2) and CPU board card (3) are by core bus and two-way connection of backboard (5), and described power supply integrated circuit board (4) is connected with WTB integrated circuit board (1), USB integrated circuit board (2) and CPU board card (3) respectively by power line; Described WTB integrated circuit board (1) is responsible for the data acquisition and the transmission of WTB bus apparatus; Described USB integrated circuit board (2) is responsible for the data acquisition and the control of USB device;

Described WTB integrated circuit board (1) comprises MCU control circuit (6), FPGA encoding and decoding processor (7) and WTB bus driver (8), described FPGA encoding and decoding processor (7) respectively with MCU control circuit (6), WTB bus driver (8) and two-way connection of backboard (5), described MCU control circuit (6) is by core bus and two-way connection of backboard (5), and described WTB bus driver (8) is connected with the WTB bus is two-way;

Described USB integrated circuit board (2) comprises usb protocol controller (9), and described usb protocol controller (9) is connected with core bus and usb bus are two-way respectively;

Described CPU board card (3) comprises central processing unit (10), FLASH memory (11), SDRAM memory (12), electric power management circuit (13), reset circuit (14) and Nonvolatile memory cell (15), described central processing unit (10) respectively with FLASH memory (11), SDRAM memory (12), electric power management circuit (13), reset circuit (14), Nonvolatile memory cell (15) and two-way connection of backboard (5).

2. a kind of WTB-USB gateway according to claim 1 based on ARM7, it is characterized in that: described central processing unit (10) is 32 ARM7 processor NET+50 chips, described MCU control circuit (6) comprises with 8 bit processors and ESCC controller being the WTB agreement control circuit IS62C1024 chip of core, described FPGA encoding and decoding processor (7) comprises the FPGA device, described WTB bus driver (8) comprises RS485 protocol controller and MOSFET device, and described usb protocol controller (9) comprises usb protocol MAX3420 chip.

3. a kind of WTB-USB gateway based on ARM7 according to claim 1 is characterized in that: described WTB integrated circuit board (1), USB integrated circuit board (2) and CPU board card (3) are integrated on the backboard (5), by core bus and two-way connection of backboard (5).