CN202424776U

CN202424776U - Mixed type network interface converter

Info

Publication number: CN202424776U
Application number: CN2012200448781U
Authority: CN
Inventors: 肖兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-02-13
Filing date: 2012-02-13
Publication date: 2012-09-05
Anticipated expiration: 2022-02-13

Abstract

The utility model relates to a mixed type network interface converter. The mixed type network interface converter comprises a master control module, a high speed parallel port module, a serial port module, a data storage buffer module and a network interface module and is characterized in that the master control module is respectively connected with the high speed parallel port module, the serial port module, the data storage buffer module and the network interface module. The master control module is connected with Ethernet through the network interface module and then is connected into a network system after data generated by a device needing to communicate with the network on scene through the high speed parallel port module or the serial port module is buffered through a data pool of the data storage buffer module and is subjected to format conversion to form standard TCP/IP (Transmission Control Protocol / Internet Protocol) protocol data.

Description

The heterogeneous network interface convertor

Technical field

The utility model relates to a kind of Network Interface Unit, especially the heterogeneous network interface convertor.

Background technology

Need on-the-spot network access facility at a lot of industrial circles, traditional Network Interface Unit interface is single, and some is to use standard network interface, and distance is restricted, and the cost of wiring is than higher.

Summary of the invention

Single in order to overcome existing Network Interface Unit interface, the deficiency that wiring cost is too high, the utility model provides a kind of heterogeneous network interface convertor.Adopt DSP as embedded microprocessor system, the coprocessor with embedding be used for the parallel data passage that rapid data is handled, can realize that serial line interface grows the online Network Transmission conversion of distance simultaneously.

The utility model solves the technical scheme that its technical problem adopted: the heterogeneous network interface convertor; Comprise main control module, high speed parallel port module, serial port module, storage buffer module, Network Interface Module; It is characterized in that main control module is connected with high speed parallel port module, serial port module, storage buffer module, Network Interface Module respectively.Main control module through high speed parallel port module or serial port module insert scene need with the data of the equipment of network communication, pass through Network Interface Module and Ethernet connection access network network system after becoming standard ICP/IP protocol data through the data pool buffering of storage buffer module and through format conversion.

The beneficial effect of the utility model is, can realize the parallel port conversion that access speed is high, also can grow the network switch of distance through serial port module, and is convenient flexibly, has very high practical value.

Description of drawings

Fig. 1 is the theory diagram of the utility model.

Embodiment

In Fig. 1; The heterogeneous network interface convertor; Comprise main control module 1, high speed parallel port module 2, serial port module 5, 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, serial port module 5, storage buffer module 3, Network Interface Module 4 respectively.Main control module 1 through high speed parallel port module 2 or serial port module 5 insert scene need with the data of the equipment of network communication, become after the standard ICP/IP protocol data through Network Interface Module 4 and Ethernet connection access network network system through the data pool buffering of storage buffer module 3 and through format conversion.

Main control module 1 selects for use DSP controller TMS320LF2407 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.Its existing high-speed parallel translation interface possesses the interface of serial simultaneously.Network Interface Module 4 adopts LAN91C111 ethernet controller and 802.3 Ethernet host-host protocols.Its 8-32 bit data bus interface units link to each other with the CPU of outside with data/address bus through 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 communication of data and transmit through high speed parallel port module 2.Storage buffer module 3 adopts the EEP-ROM interface, and 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 through the EEPROM interface during bootstrapping again, thereby realizes auto-initiation.Bus arbiter is used for keeping watch on the data interchange situation of industry ethernet; In case cause clogging; Moderator is got in touch through 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 and the bus control unit between the DMA controller controlled 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 the embedded ethernet that does not have 16 bit DSPs (TMS320LF2407) and TG110-S050N2 type electromagnetic coupled transformer of DMA transmission performance to constitute, 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.The RS232 industry interface standard that 5 of serial line interfaces adopt standard can realize remote transfer of data, because main control module is a Transistor-Transistor Logic level, then need carry out the voltage transitions of Transistor-Transistor Logic level to the RS232 level with MAX232, realizes the compatibility of physical layer.

Claims

1. heterogeneous network interface convertor; Comprise main control module (1), high speed parallel port module (2), serial port module (5), 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), serial port module (5), storage buffer module (3), Network Interface Module (4) respectively.