NAME

RPi::Device::PiFace - Perl6 module to drive the PiFace 2 GPIO expansion board for the Raspberry Pi 2.

SYNOPSIS

use RPi::Device::PiFace;

DESCRIPTION

RPi::Device::PiFace controls the PiFace 2 expansion board for the Raspberry Pi 2 which adds 2 banks of 8 GPIO ports (a total of 16 extra I/O pins/ports). The RPi 2 uses its SPI interface pins to control the PiFace 2.

This module uses Perl6's NativeCall module to interface the WiringPi C library and the MCP23S17.c SPI driver from wiringpi.org.

USAGE

use RPi;
use RPi::Device::PiFace;

RPi::Wiring::setup();

# Setup the PiFace board
# In effect, overlays RPi methods with equivalent methods from WiringPi's
# PiFace  C library
my $res = RPi::Device::PiFace::setup-piface(200);

loop {
  blink(202,500);
}

sub blink($pin,$delay) {
  RPi::Wiring::digital-write($pin, 1); # On
  RPi::Wiring::delay($delay);# mS
  RPi::Wiring::digital-write($pin, 0);# Off
  RPi::Wiring::delay($delay);
}

AUTHOR

Gary Ashton-Jones gary@ashton-jones.com.au

COPYRIGHT AND LICENSE

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.