PERFORMANCE OF ETHERNET PROTOCOL CONVERSION ON AN ARM-7 EMBEDDED PROCESSOR.

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1 PERFORMANCE OF ETHERNET PROTOCOL CONVERSION ON AN ARM-7 EMBEDDED PROCESSOR. Vikram M. Chavan 1, Prof. V.V.Deotare 2, Prof. R.V.Babar 3, Prof. V.B.Baru 4. 1 M.E. (VLSI & embedded System) - Pursuing Sinhgad Institute of Tech. Lonavala, Pune. 2 Asst.Professor in E&TC Dept.,Sinhgad Institute of Tech. Lonavala, Pune, Maharashtra, INDIA. 3 Asst.Professor, in E&TC Dept Sinhgad Institute of Tech. Lonavala, Pune, Maharashtra, INDIA. 4 Asst.Professor in E&TC Dept, Sinhgad College of Engg, Pune, Maharashtra, INDIA. ABSTRACT: This paper designed a research on real web access functionality is embedded in a device to enable low cost widely accessible and enhanced user interface functions for the device. A web server in the device provides access to the user interface functions for the device through a web page. A web server can be embedded into any appliance and connected to the Internet so the appliance can be monitored and controlled from remote places through the browser in a desktop. This project is focused on developing real-time services for switched Ethernet networks, keeping the Ethernet and TCP/IP Internet communication standards.many applications are in home automation, medical diagnosis, process control, security and surveillance systems, card readers, building controls and robotics, using internet browser from anywhere around the world. This paper describes in detail the implementation of a ARM based embedded Ethernet LAN controller. control.finally, the web server uses standard TCP/IP protocols, such as HTTP to manage the web pages through which we can monitor and control the interfaced devices. Keywords: ARM processor, TCP/IP Protocol, Embedded C, Embedded Ethernet controller, LAN. I) INTRODUCTION: Embedded Ethernet Communication Sever usually is a connection between upper computer and terminal unit. Embedded Web server is the realization of embedded systems with the internet through Web-a key component of Internet, network application system is running a direct impact on the quality and efficiency of its research on the Internet technology is important. In this paper, based on ARM based embedded Web server operating system, the design method, and the corresponding software and hardware design, and using Socket programming and CGI program to complete the Web server design. The embedded Web server with low cost, open to good advantages such as portability, ease of maintenance and upgrade later. Because of this design embedded Web server is a separate module, providing a standard interface, as long as the software to make some modifications can easily be applied to other embedded devices. EMBEDDED WEB SERVER: Embedded system is a kind of special computer system which has limited resources and functions. To implement Web server in embedded system is characteristic of itself. The supported TCP/IP protocol is used. Considering the need of data exchange during equipment controlling is implemented through HTML. ISSN: Page 172

2 Web Server Pages: The proposed system has embedded server pages that are stored into the flash of the embedded web server. The employed web pages are both static and dynamic. Static HTML pages are used in order to view contents that do not change, providing only an informational view, while dynamic pages are used to manage data that can vary. Specially, the developed prototype includes the following pages: 1) Home Page. 2) Status and Control. Other settings can be made by a web form that can be accessed only by the designer/manufacture. It contains several settings: the automatic refresh time. The screenshots coming from the developed application we will show how it is possible to use the proposed data acquisition System for a controlled. For that we have to reach the embedded web server by typing its address into the web browser. After a successful login it is possible to reach the home page of the status/control page. II) SYSTEM DESIGN: The communication module is the interface between central processing unit and transceiver module. Its work is to receive data form transceiver and then transmit them to the ARM processor. Processor module is the core part of the design, in which the ARM chip LPC2138 is used to complete the complex operations and receive a lot of data from transreceiver as a slave. In the module, data link between SPI port and Ethernet is established, SPI data stream format is specified, the transmission rate between serial data stream and IP data packets is controlled and IP packet is received or sent through reading or writing Ethernet interface module In the Ethernet interface module, the collected data are uploaded to a PC via Ethernet interface by using the functions of operating system and the commands from the host computer are received commands to control the data acquisition system. Acquisition equipment Interface of Acquisition equipment Interface of ARM Fig: System structure III) SOFTWARE DESIGN: Software Principle and Structure (1) Web Sever principle Web server monitor the service request from Client, provide respective service according to the type of the requests. Clients use Web browser and Web server to transmit data, after receive the request from Clients, Severs will process users request and return respective data. (2) HTTP Protocol: Flash ARM Processor LPC2138 SDRAM HTTP is the protocol Web use to communicate with browser. HTTP rules the standard mode of sending and process requests, rules the message format between browser and sever and the format of all kinds of control information. (3) Structure of System Software: Internet Router RJ-45 Interface The whole system will use B/S structure. There is Client, which communicate with embedded Web ISSN: Page 173

3 server, setting all kinds parameters, displaying all kinds of parameters from Server. Server has two programs to process the communication between it and Client. They receive parameter set by users, and then send them to respective controller module. TCP/IP Protocol: TCP/IP =Transmission Control Protocol/Internet Protocol. It can also be used as a communications protocol in the private networks. TCP/IP is a two-layered program. Transmission Control Protocol: Manages the assembling of a message or file into smaller packets. Internet Protocol: Handles the address part of each packet so that it gets to the right destination. Designed to allow peer entities on the source and destination hosts carry on a conversation TCP and UDP (end-to-end Protocols) defined here. TCP (Transmission Control) manages the assembling of a message or file into smaller packets that are transmitted over the Internet UDP (User Datagram) - Connectionless protocol for applications that do not want TCP s sequencing flow control.(speech or Video) Internet Layer Defines an official packet format and protocol called IP(Internet Protocol).Internet Layer delivers IP packets to where they are supposed to go(packet routing). Host-to-Network Layer Host connects to the network using relevant protocols so it can send IP packets over it. IV) HARDWARE DESIGN: Block Diagram: TCP/IP Model: Application Layer It contains all the higher level protocols such as Telnet, File Transfer (FTP), Simple Mail Transfer (SMTP), Domain Name Service (DNS) and Hypertext Transfer (HTTP). Application Transport Telnet FTP SMTP DNS HTTP TCP UDP The main aim of the project is to develop an embedded web server using ARM7 processor. Embedded C language has been used for the software implementation of the embedded web server. The web pages which are required for the web server were developed using HTML. This embedded web server is tested for its working, using a data acquisition web application hosted over a network of PC's. Internet IP Host to network ARPANET SATNET Ethernet Packet radio Point to Point Fig: Transmission Control Protocol/Internet Protocol Transport Layer ISSN: Page 174

4 Power supply The MAC provides addressing and channel access control mechanisms that make it possible for several terminals or network nodes to communicate within a multipoint network. Physical Layer (PHY) - PC ARM-7 Temperature The most basic network layer, providing only the means of transmitting raw bits rather than packets (SERVER) LAN Controller Sensor over a physical data link connecting network nodes. LCD Fig: Block diagram ETHERNET INTERFACE: Ethernet controller is divided into two layers according to its functions and it is shown in Fig. One is media access controller (MAC) layer and the other is network physical (PHY) layer. They correspond to Layer 2 and Layer 1 in ISO model. MAC layer provides the treatment on data sending and receiving. It also provides an interface to PHY through an internal medium in dependent interface. Magnetics (Isolation Transformer) - Part of the Physical layer used to decouple PHY from the physical Ethernet cable. RJ45 - That Ethernet Connector. (Refer fig) 10BaseT Ethernet: Transmission Rate: 10 Mb/s (20 Mb/s in optional full duplex mode) Cable Type: Two pairs of Category 3 or better unshielded twisted pair (UTP) cabling Max. Segment Length: 100 meters. Connector Technology: RJ-45. Hardware Requirement: ARM7 microcontroller, LM35, LCD, Power supply, LAN cable. Software Requirement: KEIL, Embedded C, LPC flash utility. Ethernet controller ARM MAC PHY PROCESSOR (Layer 2) (Layer1) FIG: Ethernet controller module Media Access Controller (MAC)- Magnetics V) SYSTEM TESTING: The testing of the Web Server can be completed on any personal computer. At first, input the server s address in the browser address bar, here we enter IP address, then press enter key and we enter the login page. We input the user name and password, but only the right name and password can enter the manage system. Then we can control the system and device according to different right. ISSN: Page 175

5 VI) RESULTS: The LAN controller sends the request to the router that processes and checks for the system connected to the network with the particular IP address. If the IP address entered is correct and matches to that of the server, a request is sent to the LAN controller of the server and a sessions established and a TCP/IP connection is establishes and the server starts sending the web pages to the client. When TCP & UDP test software and UDP communication program are run in the host, the test results also show that the communications from both sides are successful. Fig: The system developed. Fig: Simple graphical user display. Fig: The experimental hardware unit. VII) Future Work: The task of creating a web server was more complex than we anticipated, and there is room for a number of improvements of our project. First, we would like to make it so that the assertions can be turned back on, because then the server would be extremely stable and reliable. Then we would not have to worry about someone using the character array for the header to overflow the buffer and gain access to the rest of the files in the computer. Secondly, we would like to provide the rest of the response codes and content types. This is something that would require a lot more time, but with the way we designed our code, could be easily implemented. We would like to allow form inputs and processing. We also could implement virtual directories, although ISSN: Page 176

6 our web server would not be quite as secure. Lastly, we would like to provide even more security by limiting access based on user rights and enabling password protected directories. Our server is a basic web server, but it provides a strong base to implement a much more advanced server. We did not worry so much about speed as we did about security and reliability for this project. Increasing the speed of our server also could be a goal for future work. VIII) CONCLUSIONS: ARM-7 based embedded Ethernet system is a great way to provide status, operation, production, and maintenance information about an embedded control system to an operator that is standing at the equipment or a thousand miles away. In this paper a remote controlling system control based on embedded Web server is designed for Industry application. The system adopts Browser/Server mode and control the remote devices. Therefore, remote users can control and manage the operation using a Web browser over the internet. It has advantages of small size, longer work time and stable performance. It is applicable to a variety of fields such as industrial control, medical, instrument etc. so the scheme proposed in this paper not only can be used in connecting the embedded device to LAN, but also as a data link and physical layer support for embedded web system. REFERENCES: 1) Yu Cheng-bo, Liu Jie, and TAO Hong-yan, Research on remote Monitor technology of equipment, Information and Control, Magn. China, June ) Chen Guo-ju, Design of a monitoring system based on ARM and Ethernet applied to AC motors, Journal of Nanjing Institute of Technology, Jun ) Liu Hong-li, The Research and Experiment of the Embedded System µc /OS-II on PC, Journal of Shanghai University of Electric Power, Magn. China, June ) Zhang Shi, dong Jeanne, SHE Liwung, Design and development of ECG monitor Software system, Computer Engineering, Magn. China, May ) Wang Mei, Design of ARM based Embedded Ethernet Interface, China, IEEE ) Jie Zhang, Xuedong Zhang Design & Implementation of Embedded monitoring system for grain storage, china, IEEE ) Rui Yang, Hong Cai Research& Implement of Ethernet interface based on embedded system 2009 IEEE. 8) Fu Chong, Zhou Chuan-sheng, Implementation for general Ethernet for Embedded system, china 2009 IEEE. 9) Zhang Yun Zhou, Wu Chengdong, Design of a training & experimental platform based on Multiprotocol communication, China 2011 IEEE. 10) Andrew S. Tanenbaum (2008): Computer Networks 4 th edition. ISSN: Page 177

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