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Device::USB::Bus(3pm)					User Contributed Perl Documentation				     Device::USB::Bus(3pm)

Device::USB::Bus - Use libusb to access USB devices. VERSION
Version 0.12 SYNOPSIS
This class encapsulates the USB bus structure and provides methods for retrieving data from it. This class is not meant to be used alone, it is part of the Device::USB package. Device:USB:LibUSB provides a Perl wrapper around the libusb library. This supports Perl code controlling and accessing USB devices. use Device::USB; my $usb = Device::USB->new(); foreach my $bus ($usb->list_busses()) { print $bus->dirname(), ": "; foreach my $dev ($bus->devices()) { print " ", $dev->filename(), " "; } } DESCRIPTION
This module provides a Perl interface to the bus structures returned by the libusb library. This library supports a read-only interface to the data libusb returns about a USB bus. FUNCTIONS
dirname Return the directory name associated with this bus. location Return the location value associated with this bus. devices In array context, it returns a list of Device::USB::Device objects representing all of the devices on this bus. In scalar context, it returns a reference to that array. find_device_if Find a particular USB device based on the supplied predicate coderef. If more than one device would satisfy the predicate, the first one found is returned. pred the predicate used to select a device returns a device reference or undef if none was found. list_devices_if This method provides a flexible interface for finding devices. It takes a single coderef parameter that is used to test each discovered device. If the coderef returns a true value, the device is returned in the list of matching devices, otherwise it is not. pred coderef to test devices. For example, my @devices = $bus->list_devices_if( sub { Device::USB::CLASS_HUB == $_->bDeviceClass() } ); Returns all USB hubs found on this bus. The device to test is available to the coderef in the $_ variable for simplicity. DIAGNOSTICS
This is an explanation of the diagnostic and error messages this module can generate. DEPENDENCIES
This module depends on the Carp and Device::USB, as well as the strict and warnings pragmas. Obviously, libusb must be available since that is the entire reason for the module's existence. AUTHOR
G. Wade Johnson (wade at anomaly dot org) Paul Archer (paul at paularcher dot org) Houston Perl Mongers Group BUGS
Please report any bugs or feature requests to "", or through the web interface at <>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. ACKNOWLEDGEMENTS
Thanks go to various members of the Houston Perl Mongers group for input on the module. But thanks mostly go to Paul Archer who proposed the project and helped with the development. Thanks also go to Josep MonA~Xs Teixidor, Mike McCauley, and Tony Awtrey for spotting, reporting, and (sometimes) fixing bugs. COPYRIGHT &; LICENSE Copyright 2006 Houston Perl Mongers This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2006-09-17 Device::USB::Bus(3pm)

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Device::USB::PCSensor::HidTEMPer(3pm)			User Contributed Perl Documentation		     Device::USB::PCSensor::HidTEMPer(3pm)

Device::USB::PCSensor::HidTEMPer - Device overview VERSION
Version 0.02 SYNOPSIS
Shared code: use Device::USB::PCSensor::HidTEMPer; my $pcsensor = Device::USB::PCSensor::HidTEMPer->new(); Single-device systems: my $device = $pcsensor->device(); print $device->external()->fahrenheit() if defined $device->external(); Multi-device systems: my @devices = $pcsensor->list_devices(); foreach my $device ( @devices ){ print $device->internal()->celsius() if defined $device->internal(); } DESCRIPTION
This module is a simplified interface to the HidTEMPer thermometers created by PCSensor. It hides any problems recognizing the correct objects to initialize and the dependency on Device::USB. Use of the connected thermometers can be done by either creating a array of objects if multiple devices are connected, or the function device() if only one device is present. One example of its usage can be found in the Linux Journal August 2010, "Cool Projects edition" page 32-34. CONSTANTS The following constants are declared o PRODUCT_ID Contains the hex value of the product id on the usb chip, in this case 0x660c o VENDOR_ID Contains the hex value representing the manufacturer of the chip, in this case "Tenx Technology, Inc." o SUPPORTED_DEVICES Contains the mapping between name and identifiers for all supported thermometers. Hex value Product Internal sensor External sensor 0x5b HidTEMPerNTC Yes Yes 0x58 HidTEMPer Yes No METHODS o new() Initialize the system, and the USB-connection to be used. o device() Return a single thermometer instance. ONLY to be used in systems using a single thermometer device. Returns undef if no devices was found. o list_devices() Returns an array of recognized thermometer instances if an array value is expected, otherwise it returns a scalar with the number of devices found. DEPENDENCIES
This module internally includes and takes use of the following packages: use Device::USB; use Device::USB::PCSensor::HidTEMPer::Device; use Device::USB::PCSensor::HidTEMPer::NTC; use Device::USB::PCSensor::HidTEMPer::TEMPer; This module uses the strict and warning pragmas. BUGS
Please report any bugs or missing features using the CPAN RT tool. FOR MORE INFORMATION
None COPYRIGHT &; LICENSE Copyright (c) 2010 Magnus Sulland This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.10.1 2010-07-24 Device::USB::PCSensor::HidTEMPer(3pm)
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