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8

What libraries are available for interfacing with the GPIO?

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5 Answers

up vote 14 down vote

A very nice way to get started using gpio is using the /sys filesytem, you can do it all from the command line.

e.g.

cd sys/class/gpio
echo 0 > export
cd gpio0
echo high > direction

More documentation in linux/Documentation/gpio.txt

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Does this work with every OS? – Alex L Jun 13 '12 at 7:12
This is linux-specific. – blueshift Jun 13 '12 at 9:03
1  
Are there any tutorials that use this method? I have only seen libraries (mainly the python one). – Shane Hudson Jun 13 '12 at 13:56
Added a link to the docs. – blueshift Jun 13 '12 at 16:44
1  
This isn't necessarily a library as per the request of the OP. – Andrew Larsson Jun 18 '12 at 17:04
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up vote 11 down vote

There is one that I've found here. I haven't had the chance to test it, as my Pi hasn't arrived. It does, however, look assuring. There's even a forum thread here that professes promising payoff. If you want a down-to-the-basics C example using standard libraries, there's one here from eLinux.

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up vote 9 down vote

RPi.GPIO is a python package for GPIO controlling.

This tutorial video shows the basic usage of the package.

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up vote 1 down vote

quick2wire can be used by regular users (not root):

Quick2Wire Python API

A Python library for controlling the hardware attached to the Raspberry Pi's header pins, without running as the root user.

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While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. – Mark Booth Feb 7 at 0:59
@MarkBooth : "the essential part of the answer" is "can be used by regular users" unlike other answers. – dugres Feb 7 at 14:51
up vote 0 down vote

It is really simple to control the GPIO ports in any language as shown on http://elinux.org, so I believe that you actually do not need a framework for the direct control.

You need to know which additional features you expect of a framework, like

  • Remote control via Browser
  • a pretty Browser UI or maybe a standalone program
  • automatic timebased control (cronjobs)

I ended up writing a framework for myself: Control GPIO ports over http and with cronjobs which perfectly fits my needs. I wanted to have something for home-automation. So I needed cronjobs and a JSON-Web-Interface to run a native App on my iPhone. Therefore I did not write a Browser UI. I believe would also be good for an alarm system.

I did not find a (complete) list of frameworks yet. There are some mentioned on the forum of raspberrypi.org.

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