Interface for the PiGlow device on the Raspberry Pi
my $pg = RPi::Device::PiGlow.new();
my $values = [0x01,0x02,0x04,0x08,0x10,0x18,0x20,0x30,0x40,0x50,0x60,0x70,0x80,0x90,0xA0,0xC0,0xE0,0xFF];
See the examples directory for more ways of using this.
The PiGlow from Pimoroni
is a small board that plugs in to the Raspberry PI's GPIO header with
18 LEDs on that can be addressed individually via i²c. This module
to abstract the interface to the device so
that it can be controlled from a Raku programme. It is assumed that
you have installed the OS packages required to make i2c work and have
configured and tested the i²c appropriately. The only difference that
seems to affect the PiGlow device is that it only seems to be reported
by i2cdetect if you use the "quick write" probe flag:
sudo i2cdetect -y -q 1
(assuming you have a Rev B. or version 2 Pi - if not you should supply
0 instead of 1.) I have no way of knowing the compatibility of the
"quick write" with any other devices you may have plugged in to the Pi,
so I wouldn't recommend doing this with any other devices unless you know
that they won't be adversely affected by "quick write". The PiGlow has
a fixed address anyway so the information isn't that useful.
A useful quick guide to setting up for the Raspberry Pi 2 can be found
at https://blog.robseder.com/2015/04/12/getting-a-piglow-to-work-with-a-raspberry-pi-2/ though
most of that will work for other versions.
With a more recent Raspbian install you may just be able to switch on
raspi-config program, via
5. Interfacing Options
Assuming you have a working Rakudo installation you should be able to install this with zef :
# From the source directory
zef install .
# Remote installation
zef install RPi::Device::PiGlow
The tests will fail if run on other than a Raspberry Pi with i²c configured.
Suggestions/patches are welcomed via github.
Because there are limited ways to test this automatically without
physically observing the device, there may be untested bugs.
I've tested this on three different versions of Raspberry Pi, if you find problems please report the Pi version
as well as the OS, Raku version etc.
This is free software.
Please see the LICENCE file in the distribution
© Jonathan Stowe 2016 - 2021