CN201937633U

CN201937633U - Embedded network interface device

Info

Publication number: CN201937633U
Application number: CN2011200169628U
Authority: CN
Inventors: 叶文生
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-18
Filing date: 2011-01-18
Publication date: 2011-08-17
Anticipated expiration: 2021-01-18

Abstract

The utility model relates to an embedded network interface device, which comprises a master control module, a high-speed parallel port module, a data storage buffer module and a network interface module, wherein the master control module is respectively connected to the high-speed parallel port module, the data storage buffer module and the network interface module. A data of the device to be communicated with the network on site is accessed by the master control module through the high-speed parallel port module, is buffered by a data pool of the data storage buffer module, is converted into standard TCP/IP (transmission control protocol/internet protocol) protocol data through format conversion, and at last is connected to an Ethernet network through the network interface module and accessed into a network system.

Description

The embedded network interface device

Technical field

The utility model relates to a kind of network equipment, especially the embedded network interface device.

Background technology

Need on-the-spot network access facility at a lot of industrial circles, traditional Network Interface Unit is based on single-chip microcomputer mostly, because the speed of single-chip microcomputer is slow, causes the transmission bandwidth of network data low, cost is too high, the sexual valence ratio.

Summary of the invention

Slow in order to overcome existing Network Interface Unit speed, the deficiency that bandwidth is low, the utility model provides a kind of embedded network interface device.Adopt DSP as embedded microprocessor system, have the coprocessor of embedding and be used for the parallel data passage that rapid data is handled, in built-in network equipment, introduce the DSP technology embedded ethernet faster, more cheap, the easier function of carrying out that becomes is expanded.

The technical scheme that its technical problem that solves the utility model adopts is: the embedded network interface device, comprise main control module, high speed parallel port module, storage buffer module, Network Interface Module, it is characterized in that main control module is connected with high speed parallel port module, storage buffer module, Network Interface Module respectively.Main control module by high speed parallel port module insert on-the-spot need with the data of the equipment of network communication, be connected access network system by Network Interface Module with Ethernet after becoming standard ICP/IP protocol data through the data pool buffering of storage buffer module and through format conversion.

The beneficial effects of the utility model are, the access speed height, and Netowrk tape is roomy, and is easy to use, has very high practical value.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a theory diagram of the present utility model; Fig. 2 is an electric structure chart of the present utility model.

Embodiment

In Fig. 1, the embedded network interface device, comprise main control module 1, high speed parallel port module 2, storage buffer module 3, Network Interface Module 4, it is characterized in that main control module 1 is connected with high speed parallel port module 2, storage buffer module 3, Network Interface Module 4 respectively.Main control module 1 by high speed parallel port module 2 insert on-the-spot need with the data of the equipment of network communication, be connected access network system by Network Interface Module 4 with Ethernet after becoming standard ICP/IP protocol data through the data pool buffering of storage buffer module 3 and through format conversion.

In Fig. 2, select for use dsp controller as host CPU.TMS320LF2407 is the high performance-cost ratio of TI company issue, is applicable to the DSP of industrial control field.This series has powerful command system, stronger flexibility, the Mathematical treatment function of high speed and brand-new internal structure.Adopt LAN91C111 ethernet controller 802.3 Ethernet host-host protocols.Its 8-32 bit data bus interface unit links to each other with the CPU of outside with data/address bus by control bus, address bus.External data can 8,16 or 32 mode and LAN91C111 exchange, also be connected with external equipment simultaneously and carry out data communication and transmit by high speed parallel port module 2.This circuit is also integrated EEP-ROM interface, as the data buffering module, the initial value of all internal registers can be placed on earlier among the EEPROM, is input in the chip by the EEPROM interface during bootstrapping again, thereby realizes auto-initiation.Bus arbiter is used for monitoring that the data of industry ethernet exchange situation, in case block, moderator is got in touch by Bus Interface Unit and outer CPU on the one hand, controls memory control unit (MMU) and storage buffer module on the other hand, realizes the bus data coordination.The storage condition of the dynamic SRAM of memory control unit may command 8kB realizes that data contact dma controller between dma controller and bus control unit control the exchanges data between DMA and the Ethernet protocol processor (EPH).The physical layer (PHY) that the data that the Ethernet protocol processor comes out are finally passed through 10Mb/s/100Mb/s directly arrives industry ethernet.Because LAN91C111 aims at Embedded System Design, therefore, its peripheral circuit is relatively simple.It and do not have 16 bit DSPs (TMS320LF2407) of DMA transmission performance and embedded ethernet that TG110-S050N2 type electromagnetic coupled transformer constitutes, address bus A1-A15 links to each other.A0 is not used by LAN91C111, and is unsettled; Data/address bus D0-D15 links to each other, and is used for the transmission of 16 bit data.

Claims

1. embedded network interface device, comprise main control module (1), high speed parallel port module (2), storage buffer module (3), Network Interface Module (4), it is characterized in that main control module (1) is connected with high speed parallel port module (2), storage buffer module (3), Network Interface Module (4) respectively.