Web Server Implementation On DE2 Final Presentation Performed
by: Ariel Morali Nadav Malki Supervised by: Ina Rivkin Slide 2
Project Goals Assemble a SOPC system, using Nios II processor and
an Ethernet Peripheral on Alteras DE2 board. Implement Micriums C
OS-II. Implement Nichestack TCP/IP Stack. Build a webserver and a
website that demonstrates the systems abilities. Slide 3 Project
Scheme Ethernet Cable Slide 4 The SOPC The SOPC includes: Nios II
Processor Ethernet Controller External SDRAM Memory UART PLL PIOs
(Seven-Segments & LEDs) Slide 5 Micriums C OS-II Mainly for
embedded systems Main features: Scalable (5-24KB) Real time
Pre-emptive multitasking Priority based Limited (but big enough)
number of tasks Supply OS services: Semaphores and mutexes Message
mailboxes and queues Timer and memory management Slide 6 Nichestack
TCP/IP stack NicheStack is an Embedded TCP/IP protocol stack.
NicheStack IPv4 combines small size, extreme portability and high
performance. NicheStack uses the C OS Multiprogramming feature. The
DE2 board has a Davicom DM9000A Ethernet controller, that is not
supported by the Nichestack. Slide 7 The Software The software
includes: Micriums C OS-II System Libraries Nichestack TCP/IP Stack
Read Only zip File-System Webserver implementation HTML website The
website demonstrates the system capabilities: Remote controlling
the DE2 board Monitoring the boards status Running several
processes in parallel Remote Using the SOPC processor to perform
simple computations Slide 8 System Overview Slide 9 Block Diagram
The following diagram describes the System: Slide 10 Quartos Screen
Shot Slide 11 SOPC Builder Screen Shot Slide 12 Ethernet Controller
& Nichestack The DE2 board has a Davicom DM9000A Ethernet
controller. In order to use the TCP/IP protocol we planed to use
the Nichestack TCP/IP stack. DM9000A is not supported by the
Nichestack. A group from Columbia University modified the original
DM9000A Driver to work with the Nichestack. We successfully managed
to take the driver and use it in our project. Slide 13 Website
& Server Slide 14 Webserver Main Processes 1)Webserver main
task Manage the TCP/IP and HTTP protocols. 2)Nichestack tasks.
3)Two board Control tasks Handling the data from the web site.
4)Board status task Monitors the Board status and creates an
appropriate html page. 5)Two sweep leds tasks. Slide 15 Site Main
Screen Two Board Control Tasks Running in parallel Slide 16 Site
Board Over-View Screen Switches Status Seven Segment Status Slide
17 What Happens When you press the Button 1)The Browser ends the
form to the webserver. Wireshark screenshot: 2)The webserver
detects a POST request. The POST request is being sent when a
client needs to send data to the server (according to the HTTP
protocol). Computer IP DE2 IP HTTP PORT Form Data Slide 18 What
Happens When you press the Button Continue 2)The webserver process
wakes up one of the board control processes, by sending it a
message. The message contains information about the operation
needed to be performed. 3)The board control process handles the
message and performs the requested operation. Then the board
control process waits for new message. Slide 19 Skills Acquired
Multiprogramming with C OS-II Multiprogramming with C OS-II
creating and maintaining several processes Synchronization -
sending messages And more Nichestack on DE2 implemantation.
Nichestack on DE2 implemantation. TCP/IP socket programming with
Nichestack. TCP/IP socket programming with Nichestack. open, close,
listen, connect, send, HTTP Protocol HTTP Protocol WireShark Helped
a lot. Read Only ZIP File System (stores our html pages). Read Only
ZIP File System (stores our html pages). Html programming Html
programming And more And more Slide 20 Thank You
