NAME Device::SMBus - Perl interface for smbus using libi2c-dev library. VERSION version 1.05 SYNOPSIS use Device::SMBus; $dev = Device::SMBus->new( I2CBusDevicePath => '/dev/i2c-1', I2CDeviceAddress => 0x1e, ); print $dev->readByteData(0x20); DESCRIPTION This is a perl interface to smbus interface using libi2c-dev library. Prerequisites: * sudo apt-get install libi2c-dev i2c-tools build-essential If you are using Angstrom Linux use the following: * opkg install i2c-tools * opkg install i2c-tools-dev Enabling the I2C on a Raspberry Pi: You will need to comment out the driver from the blacklist. currently the I2C driver isn't being loaded. sudo vim /etc/modprobe.d/raspi-blacklist.conf Replace this line blacklist i2c-bcm2708 with this #blacklist i2c-bcm2708 You now need to edit the modules conf file. sudo vim /etc/modules Add these two lines; i2c-dev i2c-bcm2708 Now run this command(replace 1 with 0 for older model Pi) sudo i2cdetect -y 1 you should now see the addresses of the i2c devices connected to your i2c bus ATTRIBUTES I2CBusDevicePath Device path of the I2C Device. * On Raspberry Pi Model A this would usually be /dev/i2c-0 if you are using the default pins. * On Raspberry Pi Model B this would usually be /dev/i2c-1 if you are using the default pins. I2CDeviceAddress This is the Address of the device on the I2C bus, this is usually available in the device Datasheet. * for /dev/i2c-0 look at output of `sudo i2cdetect -y 0' * for /dev/i2c-1 look at output of `sudo i2cdetect -y 1' METHODS fileError returns IO::Handle->error() for the device handle since the last clearerr writeQuick $self->writeQuick($value) readByte $self->readByte() writeByte $self->writeByte() readByteData $self->readByteData($register_address) writeByteData $self->writeByteData($register_address,$value) readNBytes $self->readNBytes($lowest_byte_address, $number_of_bytes); Read together N bytes of Data in linear register order. i.e. to read from 0x28,0x29,0x2a $self->readNBytes(0x28,3); readWordData $self->readWordData($register_address) writeWordData $self->writeWordData($register_address,$value) processCall $self->processCall($register_address,$value) DEMOLISH Destructor CONSTANTS I2C_SLAVE USAGE * This module provides a simplified object oriented interface to the libi2c-dev library for accessing electronic peripherals connected on the I2C bus. It uses Moose. see ALSO * Moose * IO::File * Fcntl SUPPORT Bugs / Feature Requests Please report any bugs or feature requests through github at . You will be notified automatically of any progress on your issue. Source Code This is open source software. The code repository is available for public review and contribution under the terms of the license. git clone git://github.com/shantanubhadoria/device-smbus.git AUTHOR Shantanu Bhadoria CONTRIBUTORS * Neil Bowers * Shantanu * Shantanu Bhadoria * Shantanu Bhadoria * root COPYRIGHT AND LICENSE This software is copyright (c) 2013 by Shantanu Bhadoria. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.