User manual

Rebuilding the Hardware Platform

XAPP794 (v1.3) December 20, 2013 www.xilinx.com 43

Web Session Task

The web-based GUI is implemented with several applications. Figure 47 illustrates how these

applications interact with each other.

The web server, a standard service provided by the open source BusyBox package in

embedded Linux, is the engine that generates the reference design web-based GUI.

The web page (index.html) that makes up the web-based GUI uses these technologies:

• JavaScript

•CGI

When a CGI request is generated by the Web server, the

zvik_camera_linux_webserver.elf application is invoked. When this occurs, the

application translates the CGI request, which is in HTTP format, to text-based commands and

sends the command to the zvik_camera_linux_app.elf application via a named pipe.

The inverse of this process occurs for the response of each request or command.

Rebuilding the

Hardware

Platform

Licensing the Video and Image Processing Pack IP Cores

The image processing pipeline (iPipe) reference design uses several of the Xilinx Video and

Image Processing Pack IP cores that must be licensed prior to use. Follow these steps to

request an evaluation license:

1. Go to:

ww.xilinx.com/products/intellectual-property/EF-DI-VID-IMG-IP-PACK

2. Click the Evaluate link located on the upper-left of the web page, as shown in Figure 48,

and follow the online instructions, as shown in Figure 49.

X-Ref Target - Figure 47

Figure 47: Web-Based GUI Block Diagram

Web Server

Image Statistics TaskMain TaskWeb Session Task

Web Pages

zvik_camera_linux_webserver.elf

zvik_camera_linux_app.elf

STDIN STDOUT

Names

Pipes

X794_47_110513

X-Ref Target - Figure 48

Figure 48: Xilinx Video and Image Processing Pack Evaluation License Example

X794_48_110513