Device::USB::DevConfig

       This class encapsulates a USB Device Configuration and the methods that object would
       support.

NAME

       Device::USB::DevConfig - Access the device configuration returned by libusb.

VERSION

       Version 0.37

SYNOPSIS

       Device::USB:DevConfig provides a Perl object for accessing a configuration of a USB device
       using the libusb library.

           use Device::USB;

           my $usb = Device::USB->new();
           my $dev = $usb->find_device( $VENDOR, $PRODUCT );

           printf "Device: %04X:%04X\n", $dev->idVendor(), $dev->idProduct();
           $dev->open();

           my $cfg = $dev->config()->[0];
           print "Config:", $cfg->iConfiguration(), ": interface count: ",
              $cfg->nNumInterfaces(), "\n";

       See USB specification for an explanation of the attributes of a configuration.

DESCRIPTION

       This module defines a Perl object that represents the data associated with a USB device's
       configuration. The object provides read-only access to the important data associated with
       the configuration.

   METHODS
       There are several accessor methods that return data from the configuration.  Each is named
       after the field that they return. These accessors include:

       wTotalLength
           Returns the total length of the data returned for this configuration.

       bNumInterfaces
           Returns the number of interfaces supported by this configuration.

       interfaces
           Returns a list of lists of interface objects associated with this configuration. Each
           of the inner lists is a set of alternate versions of that interface.

       bConfigurationValue
           Returns the value passed to SetConfiguration to select this configuration.

       iConfiguration
           Returns the index of the string descriptor describing this configuration.  The string
           can be retrieved using the method "Device::USB::Device::get_string_simple".

       bmAttributes
           Returns a bitmap listing the attributes. The bits a number starting with the LSB as 0.
           Bit 6 is 1 if the device is self-powered. Bit 5 is 1 if the device supports Remote
           Wakeup.

       MaxPower
           Returns the Maximum power consumption in mA. This value is not in units of 2mA as in
           the spec, but in actual mA.

DIAGNOSTICS

       This is an explanation of the diagnostic and error messages this module can generate.

DEPENDENCIES

       This module depends on the Carp, Inline and Inline::C modules, 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 (gwadej at cpan dot org) Paul Archer (paul at paularcher dot org)

       Houston Perl Mongers Group

BUGS

       Please report any bugs or feature requests to "bug-device-usb@rt.cpan.org", or through the
       web interface at <http://rt.cpan.org/NoAuth/ReportBug.html?Device::USB>.  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.

COPYRIGHT & LICENSE

       Copyright 2006-2013 Houston Perl Mongers

       This program is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.