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- Subject: Re: Raspberry Pi GPIO module for LuaJIT
- From: Craig Barnes <craigbarnes85@...>
- Date: Tue, 1 May 2012 01:25:27 +0100
Hi, thanks for this. I've thrown a copy up on GitHub and intend to
package it for the Fedora 17 (not 14) remix when it's available. I'm
willing to maintain it and package for other distributions if there's
some interest. I don't yet have a Pi to test with, although hopefully
it'll arrive before Fedora 17 does.
On 30 April 2012 20:34, Mike Pall <email@example.com> wrote:
> The Raspberry Pi foundation sent me a free RPi. Many thanks to
> Alex Bradbury for arranging this! As expected, LuaJIT runs just
> fine on the little device. :-)
> To give something back, I've written a simple GPIO module, which
> allows you to control the GPIO pins from a Lua script. It uses the
> LuaJIT FFI and doesn't need any extra C modules!
> Provided you've already compiled LuaJIT for the RPi, here's how to
> install the module:
> mkdir -p /usr/local/share/lua/5.1/rpi
> cp gpio.lua /usr/local/share/lua/5.1/rpi/gpio.lua
> The attached sample script testgpio.lua blinks an LED + resistor
> attached to GPIO 0 and reads the input status of GPIO 6.
> [Yes, you need to be root to run that, since it works without the
> help of a driver, by writing directly to the device.]
> You can read/write the pins with the gpio.pin table. These
> correspond to the numbering given on the following drawing of the
> GPIO connector on the RPi: http://elinux.org/File:GPIOs.png
> There's also a raw API for accessing all of the GPIO pins on the
> chip. Please read the source for details and do NOT use raw pin
> numbers, unless you know what they do! Don't blame me, if you fry
> your RPi -- you're on your own.
> Arguably, the module is quite primitive right now. There's much
> more you can do with the chip. Docs are available from:
> Since I'm already way too busy, I'd appreciate it if someone would
> step forward and take over development, put it under version
> control, package it up and so on. The current sample module is
> public domain. I guess the Lua community would probably most
> welcome a MIT licensed module. Thank you!