On Mon, Oct 7, 2013 at 4:21 AM, SANJAY GUPTA <gupta.san...@samsung.com> wrote:
>
> Thanks Dan,
>
>
>
> I was wrong to assume that each UsbDevice has atleast one Control Type
> UsbEndpoint other than the default control endpoint.
>
> Can you list out
>
> 1. Some of the control device examples
>
> 2. Operations which can't be done using default control endpoint
>
I don't know what you are looking for here...if you want to know what
the standard usb control requests are, read the usb spec chapter 9.
>
>
> Sorry, if its too novice a query!!!
>
> Thanks.
> Sanjay Gupta
>
>
>
>
>
> ------- Original Message -------
>
> Sender : SANJAY GUPTA<gupta.san...@samsung.com> S5/Senior
> Engineer/Architecture Analysis Lab./Samsung Electronics
>
> Date : Oct 04, 2013 11:29 (GMT+09:00)
>
> Title : Re: [javax-usb-devel] Unable to fine Control type UsbEndpoint on
> UsbDevice
>
>
>
> Thanks for your reply.
>
> I am not interested in default control endpoint.
>
> I know the endpoing with address 0x00 is a default control endpoint with
> which I am able to do control operations using UsbControlIrp.
>
> But I want to get other endpoint provided by currently active configuration
> and interface which has type ENDPOINT_TYPE_CONTROL.
>
> For your information, the UsbDevice is a mass-storage device.
>
>
>
> On Wed, Oct 2, 2013 at 6:30 AM, SANJAY GUPTA <gupta.san...@samsung.com> wrote:
>
>
> > 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.
>
> You're probably talking about endpoint 0, or the "default control
> pipe", which is a special endpoint that doesn't belong to any
> configuration or interface (or, depending on how you read the spec, it
> belongs to all configurations and interfaces, but that is not the
> interpretation used by javax.usb). You can use it via the UsbDevice
> interface methods createUsbControlIrp(), asyncSubmit() or
> syncSubmit(), etc.
>
> >
> > 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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>
>
>
>
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