CN100518130C

CN100518130C - Embedded type network access device and method

Info

Publication number: CN100518130C
Application number: CNB2005100351013A
Authority: CN
Inventors: 王晓春; 刘兴东
Original assignee: Shenzhen Polytechnic
Current assignee: Shenzhen Polytechnic
Priority date: 2005-06-02
Filing date: 2005-06-02
Publication date: 2009-07-22
Anticipated expiration: 2025-06-02
Also published as: CN1874289A

Abstract

The apparatus thereof comprises: a network interface for connecting the network device; a peripherals interface for connecting data processing device; a storage unit for temporarily saving data; and a processing unit for checking the peripherals interface according to a request received from the network interface and packaging the checked data and sending it out. Said processing unit, storage unit, network interface and peripherals interface are connected by using a system bus.

Description

Embedded type network access deice and method

Technical field

The present invention relates to a kind of network communication apparatus and method, particularly a kind of embedded type network access deice and method.

Background technology

Traditional remote data acquisition system is to be sent in the data of far-end collection site equipment and by this circuit by dedicated telephone line to gather ground, distant place control also is that same method realizes, it is special-purpose to be characterized in that communication media needs, communications protocol also is special-purpose, and supporting software, hardware are wanted oneself design.And bulk information that transmits on the Internet and data generally all are to be provided by general Web server, are capital equipments on the Internet based on the Web server of desktop computer.If but will be the application system (for example above-mentioned field apparatus) of core when being linked on the Internet with the microcontroller, this class Web server is also inapplicable.Suchlike application example has: gather the detection data that are arranged at the weather station on the high mountain top, the stock position that monitors automatic vending machine, the fault of remote diagnosis equipment etc.

Summary of the invention

The objective of the invention is to, a kind of embedded type network access deice and method are provided, solve the problem that existing embedded device can not be directly connected to the Internet.

Technical scheme of the present invention is, a kind of embedded type network access deice is provided, comprise the network interface that connects the network equipment, the Peripheral Interface that connects exclusive data treatment facility with data acquisition ability, the memory cell of temporary storaging data and processing unit, described processing unit receives control command by network interface and detects Peripheral Interface, described processing unit also will send described processing unit by network interface after the detected data encapsulation from the exclusive data treatment facility of described Peripheral Interface, memory cell, network interface and Peripheral Interface are connected with the system bus communication respectively.

In the above-mentioned embedded type network access deice, described Peripheral Interface is one or more in parallel interface, DB25 sync cap and the RS232 interface.

In the above-mentioned embedded type network access deice, also comprise the JTAG mouth that is connected with described system bus communication.

In the above-mentioned embedded type network access deice, described memory cell is FLASH and SDRAM, or one of them.

In the above-mentioned embedded type network access deice, described network interface is the 10/100Mbps Ethernet control interface of 10Mbps Ethernet control interface and compatible NE2000, or one of them.

The present invention also provides a kind of built-in network cut-in method, may further comprise the steps: (a) provide Peripheral Interface to connect application system; (b) provide network interface to connect the Internet; (c) receive control command by network interface, and detect Peripheral Interface according to described control command; (d) will send to the Internet from the data that Peripheral Interface receives.

In the above-mentioned built-in network cut-in method, described Peripheral Interface is one or more in parallel interface, DB25 sync cap and the RS232 interface.

In the above-mentioned built-in network cut-in method, described network interface is the 10/100Mbps Ethernet control interface of 10Mbps Ethernet control interface and compatible NE2000, or one of them.

In the above-mentioned built-in network cut-in method, wherein step (c) comprises that the data deblocking that will receive by network interface is to obtain the step of control command.

In the above-mentioned built-in network cut-in method, wherein step (d) comprises that data encapsulation with to be sent becomes the step of packet.

Embedded type network access deice of the present invention and method, by the embedded internet access device, as long as make the data acquisition system in a distant place and control appliance possess the condition that inserts the Internet, just can realize the collection of data and the control of equipment by the Internet very easily.

Description of drawings

Fig. 1 is the applied environment schematic diagram of embedded type network access deice of the present invention.

Fig. 2 is the structured flowchart of embedded type network access deice of the present invention.

Fig. 3 is the circuit diagram of embedded type network access deice of the present invention.

Fig. 4 is the flow chart of built-in network cut-in method of the present invention.

Embodiment

As shown in Figure 1, be the applied environment schematic diagram of embedded type network access deice 20 of the present invention.Access device 20 is connected with the Internet 30 communications, and can connect the application system 10 (only illustrating among the figure) at one or more scenes.Access device 20 inserts the Internet 30 by network equipments such as switch, hub or routers.The Internet 30 also is connected with one or more remote terminals 40.

Application system 10 is the data handling system of hardware configuration relatively poor relatively (with respect to personal computer), for example is arranged at Weather station apparatus on the high mountain top, automatic vending machine, remote diagnosis equipment etc.For cost consideration, these application systems 10 have the ability (as meteorological data, inventory data, fault data etc.) of data acquisition, but the data processing of these systems, analysis ability relatively a little less than, must rely on the higher relatively equipment of performance such as personal computer further to handle.

Access device 20 is according to 30 control commands that receive from the Internet, reads the data that the application system 10 that is attached thereto is gathered, and with data encapsulation become can be on the Internet 30 data packets for transmission.The same remote terminal 40 that inserts the Internet 30 can use WEB browser (for example browser of Microsoft or netscape browser) to visit above-mentioned packet, and this remote terminal 40 can receive the packet that access device 20 sends via the Internet 30; This remote terminal 40 also can send the control command that the data of application system 10 are read in requirement to access device 20 via the Internet 30.In the present embodiment, remote terminal 40 can be the relative higher system of hardware configuration, for example personal computer etc.

As shown in Figure 2, be the structured flowchart of embedded type network access deice 20 of the present invention.Access device 20 comprises processing unit 22, network interface 21, memory cell 24 and Peripheral Interface 23.Network interface 21, memory cell 24 and Peripheral Interface 23 are connected with processing unit 22 respectively.

Peripheral Interface 23 can be standard RS232 serial ports, DB25 synchronous communication mouth, 18 programmable parallel I/O interfaces etc.By this Peripheral Interface 23, access device 20 can connect different application system 10.Certainly, Peripheral Interface 23 is not limited to above-mentioned interface.In the present embodiment, network interface 21 is the Ethernet interface of standard, 10Mbps Ethernet control interface, compatible NE2000 10/100Mbps Ethernet control interface (perhaps comprising above two interfaces) for example, it can be connected to internet device (for example hub, interchanger, router etc.) by straight through cable (for example coaxial cable or twisted-pair feeder).

Memory cell 24 comprises flash memory (FLASH) and synchronous dynamic random access memory (SDRAM) etc., is solidified with program among the FLASH, but and temporary storaging data among the SDRAM.Processing unit 22 is for having the digital signal processor of strong data capability, and it can be by the combine realization of hardware with software.This processing unit 22 with network interface 21 from the Internet 30 packets that receive (as the TCP/IP bag) deblocking (unpacking), i.e. the header of place to go packet and telegram end, thus obtain control command.Processing unit 22 is also carried out the control command of above-mentioned acquisition, detects the data and the state of each Peripheral Interface 23, and detected data are kept in the memory cell 24; Be packet according to control command with the data encapsulation in the memory cell 24 then, and send to remote terminal 40 by the Internet 30 and do further processing.

In addition, access device 20 also can comprise a JATG interface (not shown), realizes online programming.By jtag interface, can all parts of chip internal be conducted interviews, thereby be a kind of simple and high-efficient means of the debugging embedded system of exploitation.

As shown in Figure 3, be the circuit diagram of embedded type network access deice 20 of the present invention.In this embodiment, the 10/100Mbps Ethernet control interface of Flash and SDRAM memory, 10Mbps Ethernet control interface, compatible NE2000, two standard RS232 serial ports, DB25 synchronous communication mouth, 18 programmable I/O interfaces, jtag interfaces are connected with system bus respectively.Wherein processing unit 22 has adopted 32 MPU chip, has stronger disposal ability, partial function can be integrated into this access device, thereby can simplify the design of application system.

As described in Figure 4, be the flow chart of built-in network cut-in method of the present invention.At first, each module in the initialization access device 20 is to provide network interface 21 and Peripheral Interface 23 (step S41).Then, the processing unit 22 of access device 20 is monitored the packet that network interface 21 receives, and with the controlled instruction of packet deblocking (connection request) (step S42).The above-mentioned request of processing unit 21 responses, the data and the state of detection Peripheral Interface 23, and sending to the Internet 30 (step S43) after the data encapsulation.Return step S42 then.

Claims

1, a kind of embedded type network access deice, it is characterized in that, comprise the network interface that connects the network equipment, the Peripheral Interface that connects exclusive data treatment facility with data acquisition ability, the memory cell of temporary storaging data and processing unit, described processing unit receives control command and detects Peripheral Interface according to described control command by network interface, described processing unit also will send described processing unit by network interface after the detected data encapsulation from the exclusive data treatment facility of described Peripheral Interface, memory cell, network interface and Peripheral Interface are connected with the system bus communication respectively.

2, embedded type network access deice according to claim 1 is characterized in that, described Peripheral Interface is one or more in parallel interface, DB25 sync cap and the RS232 interface.

3, embedded type network access deice according to claim 1 is characterized in that, also comprises the JTAG mouth that is connected with described system bus communication.

4, embedded type network access deice according to claim 1 is characterized in that, described memory cell is FLASH and SDRAM.

5, embedded type network access deice according to claim 1 is characterized in that, described network interface is the 10/100Mbps Ethernet control interface of 10Mbps Ethernet control interface and compatible NE2000, or one of them.