CN201708810U

CN201708810U - Serial-to-Ethernet device

Info

Publication number: CN201708810U
Application number: CN201020210815XU
Authority: CN
Inventors: 王震; 王佳强
Original assignee: TIANJIN TONGGUANG GROUP ZHENTONG ELECTRONIC CO Ltd
Current assignee: TIANJIN TONGGUANG GROUP ZHENTONG ELECTRONIC CO Ltd
Priority date: 2010-06-01
Filing date: 2010-06-01
Publication date: 2011-01-12
Anticipated expiration: 2020-06-01

Abstract

A serial-to-Ethernet device is reflected that a RS232 serial port module and an Ethernet controller module are connected by a network connector. The Ethernet controller module is divided into two layers by function: a medium access controller layer MAC and a network physical layer PHY respectively corresponding to a second layer and a first layer of an ISO module. Level switch of the RS232 serial port module is of MAX3244EEAI industrial grade serial port conversion chip, the communication is of multi-data bit with data stream control, and the transmission data adopts CRC verification. The device is applied to the field of industrial factory automatic control, telecom communication, storage automation control application building intelligent system, mass electronic platform scale system, self-service bank system and the like. The transmission speed is ranged between 50 and 115200bps so as to ensure reliable transmission. The serial-to-Ethernet device provides dialing in/out service. Due to the adoption of a more powerful processor (32bits, 100M) and a larger memory (8M), the serial-to-Ethernet device steadily runs at fast speed.

Description

Serial ports changes Ethernet device

Technical field

The utility model belongs to computer network communication transfer of data translation interface device, and particularly a kind of serial ports changes Ethernet device.

Background technology

All devices is linked to be network will become a kind of standard, and the Ethernet transmission has long transmission distance, and speed is fast, reliability height, advantages such as wiring convenience.Serial ports be a kind of application general, develop simple communication mode, but transmission range short (approximately 15M) gets up both advantages will satisfy the commercial Application needs greatly.Serial ports commentaries on classics Ethernet majority is low side processors such as application single-chip microcomputer on the market now, and processing speed is slow, can not satisfy real-time transmission of information.And select 32 arm processor for use, and improved the information processing ability greatly, satisfy the Industry Control requirement substantially.

The utility model content

Technical problem to be solved in the utility model is: provide a kind of serial ports to change Ethernet device.It is at industrial applicability, comprise in the fields such as remote monitoring, measurement, the network equipment and switch, industrial automation, HVAC, safe protection of building site demand to the data long-distance transmissions, the design based on INTEL PXA270, the single-chip serial ports of 32 bit processors changes the Ethernet scheme, to satisfy the sector application demand.

The technical solution of the utility model is:

A kind of serial ports changes Ethernet device, and it is characterized in that: the RS232 serial port module is connected by network connector with the ethernet controller module.

The ethernet controller module is divided into two layers by function: media access controller layer MAC and networked physics layer PHY; Respectively corresponding ISO model the 2nd and the 1st layer.

The level conversion of RS232 serial port module is a MAX3244EEAI technical grade serial ports conversion chip, and communication is the several data position, has data-flow-control, the The data CRC check of transmission.

The utility model effect is:

The major function of this ethernet controller is as follows:

Select transmission rate adaptively, support 10Mb/s/100Mb/s;

Fully support the full-duplex switched-type Ethernet;

Support burst transfers of data;

The internal storage of 8k byte is as receiving the FIF0 buffer memory that sends;

The CPU visit that supporting bus is 8,16,32;

Send in advance and receive.

The level conversion of RS232 adopts MAX3244EEAI technical grade serial ports conversion chip, and communication can be adopted the several data position, and has data-flow-control, and the The data CRC check of transmission guarantees reliability of data transmission.Transmission speed is 50～115200bps, and can guarantee reliable transmission.The serial communication server is supported PPP, and PAP, and agreements such as DHCP can provide the service of transfering to of dialling in.Since have more powerful processor (32bits, 100M) and bigger internal memory (8M) make its speed of service fast and stable.

This serial ports changes Ethernet device and can be applicable to fields such as industrial plant automation control area, telecom communication, storage automation control application intelligent building system, a large amount of electronic weighbridge system, self-service bank system.

Description of drawings

Fig. 1 is the ethernet controller modular structure block diagram that serial ports changes Ethernet device

Fig. 2 is the RS232 serial port module structured flowchart that serial ports changes Ethernet device

Fig. 3 is that the serial ports of serial ports commentaries on classics Ethernet device is connected block diagram with ethernet controller

Embodiment

A kind of serial ports as shown in Figure 1, 2, 3 changes Ethernet device, is that the RS232 serial port module is connected by network connector with the ethernet controller module.

Concrete scheme

Performance:

Processor: 32 520MHZ;

Network interface speed: the 10/100M self adaptation meets the 10Base-T/100Base-T standard, full duplex or half-duplex;

Software feature agreement: DHCP, Telnet, TCP, UDP, IP, ICMP, ARP;

Protection: 2KV ESD;

Serial interface: 2 RS-232;

Serial communication supplemental characteristic position: 5/6/7/8;

Verification: CRC check;

Position of rest: 1,1.5,2;

Flow Control: RTS/CTS, XON/XOFF;

Speed: 110bps-460.8Kbps;

Concrete scheme

1) ethernet controller module

The ethernet controller module is divided into two layers by function: media access controller layer (MAC) and networked physics layer (PHY).Respectively corresponding ISO model the 2nd and the 1st layer, its basic application architecture as shown in Figure 1.

The Ethernet unit is made up of Ethernet transfer of data and control unit, meets IEEE 802.3CSMA/CD access control method and physical layer specification, supports ICP/IP protocol.

We select ethernet controller is the LAN91C96 of SMSC company, and it is the third generation fast Ethernet controller of releasing for built-in applied system.Integrated MAC (Media layer) and the PHY (physical layer) that follows the SMSC/CD agreement meets the IEEE802.3 standard on this chip, aim at Embedded System Design, so its peripheral circuit is relatively simple.

2) RS232 serial port module

Claims

1. a serial ports changes Ethernet device, and it is characterized in that: the RS232 serial port module is connected by network connector with the ethernet controller module.

2. serial ports according to claim 1 changes Ethernet device, and it is characterized in that: the ethernet controller module is divided into two layers by function: media access controller layer MAC and networked physics layer PHY; Respectively corresponding ISO model the 2nd and the 1st layer.

3. serial ports according to claim 1 changes Ethernet device, and it is characterized in that: the level conversion of RS232 serial port module is a MAX3244EEAI technical grade serial ports conversion chip, and communication is the several data position, has data-flow-control, the The data CRC check of transmission.