16-05-2013, 04:20 PM
EMBEDDED ETHERNET MONITOR AND CONTROLLING USING WEB BROWSER
[attachment=54033]
Abstract
Embedded Ethernet is nothing but a microcontroller which is able to communicate with the network. Currently device with microcontroller has been widely used in industrial field. However, a large number of devices don’t have the network interface and the data from them cannot be transmitted in network. A design of ARM processor-based embedded Ethernet interface is presented. In the design, an existing SPI serial device can be converted into a network interface peripheral to obtain compatibility with the network. By typing the IP-address of LAN on the web browser, the user gets a web page on screen; this page contains all the information about the status of the devices. The user can also control the devices interfaced to the web server by pressing a button provided in the web page.
INTRODUCTION
Computer communication systems and especially the Internet are playing an important role in the daily life. Using this knowledge many applications are imaginable. Home automation, utility meters, appliances, security systems, card readers, and building controls, which can be easily, controlled using either special front-end software or a standard internet browser client from anywhere around the world. 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 device 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. Temperature, Pressure, displacement, motion and sound are the most often measured environmental quantities. Among these environmental quantities, temperature is the most often measured parameter in industries. For example, some processes work only within a narrow range of temperatures; certain chemical reactions, biological processes, and even electronic circuits perform best within limited temperature ranges. So, it is necessary to measure the temperature and control if it exceeds some certain limit to avoid any misbehavior of the systems.
SYSTEM DESIGN
Many embedded systems have substantially different designs according to their functions and utilities. In the design, structured modular design methods adopted and the system is mainly composed of SPI communication module, processor module and Ethernet interface module, as shown in Fig. 1. The figure shows that the typical architecture of an embedded Ethernet monitor and control using web browser architecture. Here all the devices are connected to the processor and the ADC converters are used to convert analog data into digital data. Serial communication is done in between processor and Ethernet controller CS 8900A.It is connected to LAN cable through RJ 45 registered jack and the whole device is connected to remote PC through internet.
Ethernet Interface
Because of the ARM system without the Ethernet interface, its application value will be greatly discounted, so regard as the whole system, the Ethernet interface circuit is essential, but complicated. Form the view of hardware, as shown in figure 2, the ITU.T802.3 model layer structure, the Ethernet interface mainly contains MAC controller and physical interface. LPC2138 is embedded with MAC, but it doesn’t provide physical interface .so it uses a DM9000A chip to provide Ethernet access channels. DM9000A integrates 10/100Mbps physical interface, with an 16Kbyte SRAM which is used to send and receive the FIFO cache, it supports two 8/16bit host modes, and it supports directly interconnect flipping function, and it supports accelerated TCP/IP and so it reduces the burden of CPU and improves the efficiency and the reading and writing I/O time is 10ns only. DM9000A Ethernet controller observes 802.3 Ethernet transfer protocol promulgated by IEEE. The actual design application connection is showed by figure 2.
CONCLUSION
In order to transmit the data from an existing device with SPI interface to network, an embedded Ethernet monitor and controlling system based on web browser is designed. This design can be used widely in remote data acquisition and control system in industry. These Embedded Ethernet modules are having the capacity to perform as a true Ethernet device. It is possible to interface different kind of sensors with these modules and make various applications. So it can monitor embedded system operation state through Internet, achieving network monitoring purposes. The ARM system adopts the high performance Ethernet controller, the system communication and debugging are fast, reliable and real-time; In addition, it can be also applied in on-line monitoring, remote fault diagnosis system.
[attachment=54033]
Abstract
Embedded Ethernet is nothing but a microcontroller which is able to communicate with the network. Currently device with microcontroller has been widely used in industrial field. However, a large number of devices don’t have the network interface and the data from them cannot be transmitted in network. A design of ARM processor-based embedded Ethernet interface is presented. In the design, an existing SPI serial device can be converted into a network interface peripheral to obtain compatibility with the network. By typing the IP-address of LAN on the web browser, the user gets a web page on screen; this page contains all the information about the status of the devices. The user can also control the devices interfaced to the web server by pressing a button provided in the web page.
INTRODUCTION
Computer communication systems and especially the Internet are playing an important role in the daily life. Using this knowledge many applications are imaginable. Home automation, utility meters, appliances, security systems, card readers, and building controls, which can be easily, controlled using either special front-end software or a standard internet browser client from anywhere around the world. 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 device 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. Temperature, Pressure, displacement, motion and sound are the most often measured environmental quantities. Among these environmental quantities, temperature is the most often measured parameter in industries. For example, some processes work only within a narrow range of temperatures; certain chemical reactions, biological processes, and even electronic circuits perform best within limited temperature ranges. So, it is necessary to measure the temperature and control if it exceeds some certain limit to avoid any misbehavior of the systems.
SYSTEM DESIGN
Many embedded systems have substantially different designs according to their functions and utilities. In the design, structured modular design methods adopted and the system is mainly composed of SPI communication module, processor module and Ethernet interface module, as shown in Fig. 1. The figure shows that the typical architecture of an embedded Ethernet monitor and control using web browser architecture. Here all the devices are connected to the processor and the ADC converters are used to convert analog data into digital data. Serial communication is done in between processor and Ethernet controller CS 8900A.It is connected to LAN cable through RJ 45 registered jack and the whole device is connected to remote PC through internet.
Ethernet Interface
Because of the ARM system without the Ethernet interface, its application value will be greatly discounted, so regard as the whole system, the Ethernet interface circuit is essential, but complicated. Form the view of hardware, as shown in figure 2, the ITU.T802.3 model layer structure, the Ethernet interface mainly contains MAC controller and physical interface. LPC2138 is embedded with MAC, but it doesn’t provide physical interface .so it uses a DM9000A chip to provide Ethernet access channels. DM9000A integrates 10/100Mbps physical interface, with an 16Kbyte SRAM which is used to send and receive the FIFO cache, it supports two 8/16bit host modes, and it supports directly interconnect flipping function, and it supports accelerated TCP/IP and so it reduces the burden of CPU and improves the efficiency and the reading and writing I/O time is 10ns only. DM9000A Ethernet controller observes 802.3 Ethernet transfer protocol promulgated by IEEE. The actual design application connection is showed by figure 2.
CONCLUSION
In order to transmit the data from an existing device with SPI interface to network, an embedded Ethernet monitor and controlling system based on web browser is designed. This design can be used widely in remote data acquisition and control system in industry. These Embedded Ethernet modules are having the capacity to perform as a true Ethernet device. It is possible to interface different kind of sensors with these modules and make various applications. So it can monitor embedded system operation state through Internet, achieving network monitoring purposes. The ARM system adopts the high performance Ethernet controller, the system communication and debugging are fast, reliable and real-time; In addition, it can be also applied in on-line monitoring, remote fault diagnosis system.