# IOUSBHost Functions ## Topics ### Functions [`func IOUSBGetEndpointBurstSize(UInt32, UnsafePointer!, UnsafePointer!, UnsafePointer!) -> UInt32`](/documentation/IOUSBHost/IOUSBGetEndpointBurstSize(_:_:_:_:)) [`func IOUSBGetEndpointMult(UInt32, UnsafePointer!, UnsafePointer!, UnsafePointer!) -> UInt8`](/documentation/IOUSBHost/IOUSBGetEndpointMult(_:_:_:_:)) [`func IOUSBGetEndpointSynchronizationType(UnsafePointer!) -> UInt8`](/documentation/IOUSBHost/IOUSBGetEndpointSynchronizationType(_:)) [`func IOUSBGetEndpointUsageType(UnsafePointer!) -> UInt8`](/documentation/IOUSBHost/IOUSBGetEndpointUsageType(_:)) [`func IOUSBGetPlatformCapabilityDescriptor(UnsafePointer!) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBGetPlatformCapabilityDescriptor(_:)) [`func IOUSBGetPlatformCapabilityDescriptorWithUUID(UnsafePointer!, UnsafeMutablePointer!) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBGetPlatformCapabilityDescriptorWithUUID(_:_:)) [`func IOUSBGetSuperSpeedPlusDeviceCapabilityDescriptor(UnsafePointer!) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBGetSuperSpeedPlusDeviceCapabilityDescriptor(_:)) [`func IOUSBHostCIControllerStateToString(IOUSBHostCIControllerState) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBHostCIControllerStateToString(_:)) [`func IOUSBHostCIDeviceSpeedToString(IOUSBHostCIDeviceSpeed) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBHostCIDeviceSpeedToString(_:)) [`func IOUSBHostCIDeviceStateToString(IOUSBHostCIDeviceState) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBHostCIDeviceStateToString(_:)) [`func IOUSBHostCIEndpointStateToString(IOUSBHostCIEndpointState) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBHostCIEndpointStateToString(_:)) [`func IOUSBHostCIExceptionTypeToString(IOUSBHostCIExceptionType) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBHostCIExceptionTypeToString(_:)) [`func IOUSBHostCILinkStateEnabled(IOUSBHostCILinkState) -> Bool`](/documentation/IOUSBHost/IOUSBHostCILinkStateEnabled(_:)) [`func IOUSBHostCILinkStateToString(IOUSBHostCILinkState) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBHostCILinkStateToString(_:)) [`func IOUSBHostCIMessageStatusFromIOReturn(IOReturn) -> IOUSBHostCIMessageStatus`](/documentation/IOUSBHost/IOUSBHostCIMessageStatusFromIOReturn(_:)) [`func IOUSBHostCIMessageStatusToIOReturn(IOUSBHostCIMessageStatus) -> IOReturn`](/documentation/IOUSBHost/IOUSBHostCIMessageStatusToIOReturn(_:)) [`func IOUSBHostCIMessageStatusToString(IOUSBHostCIMessageStatus) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBHostCIMessageStatusToString(_:)) [`func IOUSBHostCIMessageTypeToString(IOUSBHostCIMessageType) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBHostCIMessageTypeToString(_:)) [`func IOUSBHostCIPortStateToString(IOUSBHostCIPortState) -> UnsafePointer!`](/documentation/IOUSBHost/IOUSBHostCIPortStateToString(_:)) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)