NAME
USB::LibUSB::XS - Raw XS bindings to the libusb-1.0 API.
SYNOPSIS
# import all the constants and non-method subroutines
use USB::LibUSB::XS;
my ($rv, $ctx) = USB::LibUSB::XS->init();
$ctx->set_debug(LIBUSB_LOG_LEVEL_WARNING);
my ($vendor_id, $product_id) = (0x1234, 0x5678);
my $handle = $ctx->open_device_with_vid_pid($vendor_id, $product_id);
$rv = $handle->set_auto_detach_kernel_driver(1);
$rv = $handle->claim_interface($interface);
$rv = $handle->bulk_transfer_write($endpoint, "some data", $timeout);
($rv, my $data) = $handle->bulk_transfer_read($endpoint, $length, $timeout);DESCRIPTION
USB::LibUSB::XS provides the raw XS access to the libusb-1.0 API, which can then be used by modules like USB::LibUSB, which is a more user frienly interface.
METHODS/FUNCTIONS
The following API is documented in the excellent libusb documentation.
Library initialization/deinitialization
Implementation status: complete.
set_debug
$ctx->set_debug(LIBUSB_LOG_LEVEL_DEBUG);init
my ($rv, $ctx) = USB::LibUSB::XS->init();exit
$ctx->exit();Device handling and enumeration
Implementation status: complete.
get_device_list
my ($rv, @device_list) = $ctx->get_device_list();@device_list contains USB::LibUSB::XS::Device objects.
get_bus_number
my $bus_number = $dev->get_bus_number();get_port_number
my $port_number = $dev->get_port_number();get_port_numbers
my ($rv, @port_numbers) = $dev->get_port_numbers();get_parent
my $parent_dev = $dev->get_parent();get_device_address
my $address = $dev->get_device_address();get_device_speed
my $speed = $dev->get_device_speed();get_max_packet_size
my $size = $dev->get_max_packet_size($endpoint);get_max_iso_packet_size
my $size = $dev->get_max_iso_packet_size($endpoint);ref_device
$dev = $dev->ref_device();unref_device
$dev->unref_device();open
my ($rv, $handle) = $dev->open();Return a USB::LibUSB::XS::Device::Handle object in $handle if $rv is 0.
open_device_with_vid_pid
my $handle = $ctx->open_device_with_vid_pid(0x1111, 0x2222);Return undef on error.
close
$handle->close();get_device
my $dev = $hanlde->get_device();get_configuration
my $config = $handle->get_configuration();set_configuration
my $rv = $handle->set_configuration($config);claim_interface
my $rv = $handle->claim_interface($interface_number);release_interface
my $rv = $handle->release_interface($interface_number);set_interface_alt_setting
my $rv = $handle->set_interface_alt_setting($interface_number, $alternate_setting);clear_halt
my $rv = $handle->clear_halt($endpoint);reset_device
my $rv = $handle->reset_device();kernel_driver_active
my $is_active = $handle->kernelt_driver_active($interface_number);detach_kernel_driver
my $rv = $handle->detach_kernel_driver($interface_number);attach_kernel_driver
my $rv = $handle->attach_kernel_driver($interface_number);set_auto_detach_kernel_driver
my $rv = $handle->set_auto_detach_kernel_driver($enable);Miscellaneous
Implementation status: complete.
libusb_has_capability
my $has_cap = libusb_has_capability($capability);libusb_error_name
my $error_name = libusb_error_name($error_code);libusb_get_version
my $version_hash = libusb_get_version();
my $major = $version_hash->{major};libusb_setlocale
my $rv = libusb_setlocale($locale);libusb_strerror
my $strerror = libusb_strerror($error_code);USB descriptors
Implementation status: complete.
All descriptors are returned as hash references.
get_device_descriptor
my ($rv, $desc) = $dev->get_device_descriptor();
my $iSerialNumber = $desc->{iSerialNumber};get_active_config_descriptor
my ($rv, $config) = $dev->get_active_config_descriptor($ctx);
my $iConfiguration = $config->{iConfiguration};get_config_descriptor
my ($rv, $config) = $dev->get_config_descriptor($ctx, $config_index);get_config_descriptor_by_value
my ($rv, $config) = $dev->get_config_descriptor_by_value($ctx, $bConfigurationValue);get_bos_descriptor
my ($rv, $bos) = $handle->get_bos_descriptor($ctx);get_string_descriptor_ascii
my ($rv, $data) = $handle->get_string_descriptor_ascii($desc_index, $length);get_descriptor
my ($rv, $data) = $handle->get_descriptor($desc_type, $desc_index, $length);get_string_descriptor
my ($rv, $data) = $handle->get_string_descriptor($desc_index, $langid, $length);Device hotplug event notification
Implementation status: To be implemented.
Asynchronous device I/O
Implementation status: To be implemented.
Polling and timing
Implementation status: To be implemented.
Synchronous device I/O
Implementation status: complete.
Timeouts are given in milliseconds.
control_transfer_write
my $rv = $handle->control_transfer_write($bmRequestType, $bRequest, $wValue, $wIndex, $data, $timeout);control_transfer_read
my ($rv, $data) = $handle->control_transfer_read($bmRequestType, $bRequest, $wValue, $wIndex, $length, $timeout);bulk_tranfer_write
my $rv = $handle->bulk_transfer_write($endpoint, $data, $timeout);bulk_transfer_read
my ($rv, $data) = $handle->bulk_transfer_read($endpoint, $length, $timeout);interrupt_transfer_write
my $rv = $handle->interrupt_transfer_write($endpoint, $data, $timeout);interrupt_transfer_read
my ($rv, $data) = $handle->interrupt_transfer_read($endpoint, $length, $timeout);REPORTING BUGS
Please report bugs at https://github.com/lab-measurement/USB-LibUSB/issues.
CONTACT
Feel free to contact us at the #labmeasurement channel on Freenode IRC.
AUTHOR
Simon Reinhardt, <simon.reinhardt@physik.uni-r.de>
COPYRIGHT AND LICENSE
Copyright (C) 2017 by Simon Reinhardt
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.24.0 or, at your option, any later version of Perl 5 you may have available.