System.USB.Misc

This module provides miscellaneous functionality.

Capabilties of libusb

data Capability

Capabilities supported by an instance of libusb on the current running platform.

Test if the loaded libusb library supports a given capability by calling hasCapability.

Constructors

HasCapability

The hasCapability API is available.

HasHotplug

Hotplug support is available on this platform.

HasHidAccess

The library can access HID devices without requiring user intervention.

Note that before being able to actually access an HID device, you may still have to call additional libusb functions such as detachKernelDriver.

SupportsDetachKernelDriver

The library supports detaching of the default USB driver, using detachKernelDriver, if one is set by the OS kernel.

Instances

Enum Capability

Eq Capability

Data Capability

Ord Capability

Read Capability

Show Capability

Generic Capability

Typeable * Capability

type Rep Capability

hasCapability :: Ctx -> Capability -> Bool

Check at runtime if the loaded libusb library has a given capability.

This call should be performed after newCtx, to ensure the backend has updated its capability set. For this reason you need to apply it to a Ctx.

Version of libusb

data LibusbVersion

Structure providing the version of the libusb runtime.

Constructors

LibusbVersion

Fields

major :: Word16

Library major version.

minor :: Word16

Library minor version.

micro :: Word16

Library micro version.

nano :: Word16

Library nano version.

rc :: String

Library release candidate suffix string, e.g. "-rc4".

Instances

Eq LibusbVersion

Data LibusbVersion

Read LibusbVersion

Show LibusbVersion

Generic LibusbVersion

Typeable * LibusbVersion

type Rep LibusbVersion

libusbVersion :: LibusbVersion

Returns the version (major, minor, micro, nano and rc) of the loaded libusb library.

toVersion :: LibusbVersion -> Version

Convert a LibusbVersion to a Version for easy comparison.