On Time RTOS-32 Documentation

RTUSB-32 Programming Manual

RTUSB-32 Reference Manual

Function RTUGetDevice

Function RTUDeviceSpeed

Function RTUGetConfiguration

Function RTUAltInterfaces

Function RTUGetInterface

Function RTUFindInterface

Function RTUGetEndpoint

Function RTUEndpointDirection

Function RTUEndpointType

Function RTUEndpointPacketSize

Function RTUEndpointInterval

Function RTUFindEndpoint

Function RTUGetString

Function RTUEnumDescriptors

Function RTUGetDescriptor

Function RTUEnumDevices

Function RTUParentDevice

Function RTUSuspendHubs

Function RTUGetFrameNumber

Device Configuration

Keyboard Class Driver

Mouse Class Driver

Touch Screen Driver

Printer Class Driver

Mass Storage Class Driver

AX772 USB-Ethernet Driver

AX172 USB-Ethernet Driver

CDC ECM USB-Ethernet Driver

Audio Class Driver

Media Transfer Protocol Class Driver

RTUSB-32 Error Codes and Diagnostics

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Function RTUParentDevice

RTUParentDevice retrieves the device handle of the hub a device is connected to:

RTUDeviceHandle RTUParentDevice(RTUDeviceHandle Device);

Parameters

Device

Handle of a USB device.

return value

The device's parent or NULL if Device is NULL, a virtual root hub, or has been disconnected.

Since devices can be attached and detached at any time, the returned handle may be invalid if used in a subsequent call (the device might have been removed in the mean time). To guard against device attachment and detachment while the application steps through the device tree, it is recommended to temporarily disable the RTUSB-32 internal Hub class driver using RTUSuspendHubs.

Left Device Query

Function RTUEnumDevices

Down Function RTUSuspendHubs