Source Code

Simulating GPIO Pins

I am currently writing a control and monitoring software system that makes use of GPIO pins. Since I was at the CCC congress in Berlin I did only have my laptop and no real GPIO hardware...

With only a laptop it's a bit hard to write GPIO software, since laptops usually don't have any GPIO pins. So what I needed to test my new software was either a real device (out of reach) or... writing a simulator.

<Nick> What is a GPIO Simulator?
<kettenis> You write to a pin and nothing happens...

Software Projects

All of these projects, except dynload and mod_clamscan, are in the OpenBSD ports and packages collection.

Using Java for CGI Applications

Copyright © 1996 by Marc Balmer, CH-4055 Basel, Switzerland.

This paper discusses strategies and methods to use Java as a programming language for CGI (Common Gateway Interface) applications.

The Java Framework for CGI

(This document describes version 1.01 of the framework)

Copyright © 1996 by Marc Balmer, CH-4055 Basel, Switzerland.

Internet applications written in the Java programming language are mostly designed as applets that run in a Java enabled browser like Netscape.

There are, however, still many web-browser around that don't support Java. These need to use CGI (Common Gateway Interface) to access interactive pages on the web. Although CGI programs traditionally were realized using a scripting language like Perl or even the Bourne shell, nothing speaks against using Java to write CGI program.

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