Abstract
This article describes the implementation of a web server using an embedded Altera NIOS II IP core, a general purpose and configurable RISC processor which is embedded in a Cyclone FPGA. The processor uses the μCLinux operating system to support a Boa web server of dynamic pages using Common Gateway Interface (CGI). The FPGA is configured to act like the master node of a network, and also to control and monitor a network of smart sensors or instruments. In order to develop a totally functional system, the FPGA also includes an implementation of the time-triggered protocol (TTP/A). Thus, the implemented master node has two interfaces, the webserver that acts as an Internet interface and the other to control the network. This protocol is widely used to connecting smart sensors and actuators and microsystems in embedded real-time systems in different application domains, e.g., industrial, automotive, domotic, etc., although this protocol can be easily replaced by any other because of the inherent characteristics of the FPGA-based technology.
Highlights
Nowadays, due to the Internet and embedded webservers, it is possible to carry out technological remote monitoring operations at a very low cost [1]
Internet interface and the other to control the network. This protocol is widely used to connecting smart sensors and actuators and microsystems in embedded real-time systems in different application domains, e.g., industrial, automotive, domotic, etc., this protocol can be replaced by any other because of the inherent characteristics of the FPGA-based technology
The whole system was implemented in a Cyclone II EP2C35 FPGA that is in the NIOS II
Summary
Due to the Internet and embedded webservers, it is possible to carry out technological remote monitoring operations at a very low cost [1]. Embedded web servers have a growing presence in a wide range of areas related to the commercial electronics and industrial applications [2,3] These systems are characterized by a device dedicated to monitoring microsystem networks in real time or to perform any given task automatically without requiring human intervention [4]. FPGA technology offers extremely high-performance signal processing All these features allow us to implement in a single device an embedded webserver that is executed using a soft or hard microcontroller inside the FPGA chip [7]. This microcontroller can interact with IP cores or VHDL modules that perform specific processing hardware and other tasks
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