IOUSBGetConfigurationMaxPowerMilliAmps(_:_:)

Declaration

func IOUSBGetConfigurationMaxPowerMilliAmps(_ usbDeviceSpeed: UInt32, _ descriptor: UnsafePointer<IOUSBConfigurationDescriptor>!) -> UInt32

Parameters

• usbDeviceSpeed:

  The operational speed of the device.

• descriptor:

  The configuration descriptor to parse.

Return Value

The number of milliamps necessary.

Discussion

This method parses a configuration descriptor and returns the number of milliamps necessary to power the device.

See Also

Configuration Descriptor Parsing

• IOUSBGetNextDescriptor(_:_:)
• IOUSBGetNextDescriptorWithType(_:_:_:)
• IOUSBGetNextAssociatedDescriptor(_:_:_:)
• IOUSBGetNextAssociatedDescriptorWithType(_:_:_:_:)
• IOUSBGetNextInterfaceAssociationDescriptor(_:_:)
• IOUSBGetNextInterfaceDescriptor(_:_:)