Hi All,
I am trying to find the Control type UsbEndpoint using below method expecting
that each UsbDevice has atlease one control endpoint. But this is unable to
find the desired endpoint and returns null.
private UsbEndpoint getControlEndpoint(final UsbDevice usbDevice) {
final UsbDeviceDescriptor usbDeviceDescriptor =
usbDevice.getUsbDeviceDescriptor();
for ( int i=0; i<usbDeviceDescriptor.bNumConfigurations(); i++ )
{
final UsbConfiguration usbCurrentConfig =
usbDevice.getUsbConfiguration((byte) (i+1));
if ( usbCurrentConfig == null) {
continue;
}
final UsbConfigurationDescriptor usbCurrentConfigDescriptor =
usbCurrentConfig.getUsbConfigurationDescriptor();
for ( int j=0; j<usbCurrentConfigDescriptor.bNumInterfaces();
j++ )
{
UsbInterface usbCurrentInterface =
usbCurrentConfig.getUsbInterface((byte) j);
for ( int k=0; k<usbCurrentInterface.getNumSettings();
k++ )
{
usbCurrentInterface =
usbCurrentInterface.getSetting((byte) k);
final List<?> usbEndpoints =
usbCurrentInterface.getUsbEndpoints();
for ( int l = 0; l<usbEndpoints.size(); l++ )
{
final UsbEndpoint usbCurrentEndpoint =
(UsbEndpoint) usbEndpoints.get(l);
if ( usbCurrentEndpoint.getType() ==
UsbConst.ENDPOINT_TYPE_CONTROL &
usbCurrentEndpoint.getUsbEndpointDescriptor().bEndpointAddress() != (byte) 0x00
)
{
return usbCurrentEndpoint;
}
}
}
}
}
return null;
}
Any suggestion would be of great help.
Thanks in Advance..
Sanjay Gupta
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