Subject:
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Do you like functional programming?
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 1 May 2007 18:01:04 GMT
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Viewed:
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5402 times
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If so, this might be of interest to you. I saw it posted on
Lambda the Ultimate:
http://www.haskell.org/haskellwiki/The_Monad.Reader
The first article is entitled “A Recipe for controlling Lego using Lava.”
If you’re not familiar with the Lava Hardware
Description Language, it’s a Haskell library used to compose structural circuit
descriptions and to help define physical circuit layouts.
Rather than try to summarize his article, I’ll just quote the abstract/summary
he wrote himself:
“The Haskell library Lava is great for describing the structure of digital
circuits: large, regular circuits can be captured by short, clear descriptions.
However, structural circuit description alone – and hence Lava – has a somewhat
limited application domain. Many circuits are more appropriately expressed in
terms of their desired behaviour.
“In this article, I present a new module for Lava – called Recipe – that
provides a set of behavioural programming constructs, including mutable
variables, sequential and parallel composition, iteration and choice. Mutable
state is provided in the form of rewrite rules – normal Lava functions from
state to state – giving a powerful blend of the structural and behavioural
styles.
“The approach taken here is also applicable to software-based embedded systems
programming. Indeed, I have developed a simple C backend for Lava, and my final
example – a program that controls a brick-sorter robot – runs on a Lego
Mindstorms RCX microcontoller.”
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