Dan,
I am sorry actually. I did not know the Native error code then. I have gone
through the jdoc and the Native error code returned by the Platform
Exception is "0" in this case.
I am again sorry if i am being too silly. But, i have been working on this
and have been successful for the most part. I am in the last phase.
Thank you
Regards
Rahul
On 8/12/08, Dan Streetman <[EMAIL PROTECTED]> wrote:
>
> I don't think you quite understand what a stack track is...the Thread
> is not the "root cause"...
>
> anyway, I'm sorry, but I really need to insist that you start reading
> the API javadoc:
> http://javax-usb.org/jdoc/
>
> Check the UsbPlatformException doc and you will clearly see how to get
> the native error code.
>
> On Tue, Aug 12, 2008 at 2:17 PM, Bourothu Rahul
> <[EMAIL PROTECTED]> wrote:
> > Dan,
> >
> > I am getting the following stack trace for the platform exception:
> >
> > DCP Submission failed: Error submitting IRP: Submission aborted
> > javax.usb.UsbPlatformException: Error submitting IRP: Submission aborted
> > at
> > com.ibm.jusb.os.linux.JavaxUsbUsb.errorToUsbException(JavaUsb.java:73)
> > at
> >
> com.ibm.jusb.os.linux.LinuxPipeRequest.completeUsbIrp(LinuxPipeRequest.java:84)
> > at
> >
> com.ibm.jusb.os.linux.LinuxPipeRequest.setCompleted(LinuxPipeRequest.java:74)
> > at com.ibm.jusb.os.linux.JavaxUsb.nativeDeviceProxy(Native
> > Method)
> > at
> > com.ibm.jusb.os.linux.LinuxDeviceProxy$1.run(LinuxDeviceProxy.java:91)
> > at java.lang.Thread.run(Thread.java:595)
> >
> > I see that the root cause is because of the Thread. Is there anyhow i can
> > keep requesting the device until i get the required code from it?
> >
> > Thank you in advance.
> >
> > Regards
> > Rahul
> >
> > On 8/12/08, Dan Streetman <[EMAIL PROTECTED]> wrote:
> >>
> >> The "platform" exception indicates that the OS returned some error
> >> that isn't recognizable by the javax.usb OS implementation. There
> >> should be a number and/or message associated with the platform
> >> exception, if you get that it will help figure out what error linux is
> >> sending.
> >>
> >> On Tue, Aug 12, 2008 at 12:28 PM, Bourothu Rahul
> >> <[EMAIL PROTECTED]> wrote:
> >> >
> >> > Dan,
> >> >
> >> > When i keep sending the HID request to the DCP using syncSubmit, after
> >> > few
> >> > times, i.e like 50-70 times after submitting, i get the following and
> i
> >> > am
> >> > getting kicked out of the loop!
> >> >
> >> > DCP Submission failed: Error Submitting IRP: Submission aborted
> >> > javax.usb.UsbPlatformException: Error submitting IRP: Submission
> aborted
> >> >
> >> > What can i do to resolve this?
> >> >
> >> > - Hide quoted text -
> >> >
> >> > Regards
> >> > Rahul Bourothu
> >> > On 8/12/08, Dan Streetman <[EMAIL PROTECTED]> wrote:
> >> >>
> >> >> On Tue, Aug 12, 2008 at 11:21 AM, Bourothu Rahul
> >> >> <[EMAIL PROTECTED]> wrote:
> >> >> > Dan,
> >> >> >
> >> >> > I have figured out the way yesterday. First, i issue my read
> command
> >> >> > to
> >> >> > the
> >> >> > device on the DCP and then open the pipe. Then use a UsbIrp to read
> >> >> > from
> >> >> > the
> >> >> > pipe. I am able to communicate with the device!!
> >> >> >
> >> >> > But, there is one problem. When i try to put this in a loop until i
> >> >> > get
> >> >> > the
> >> >> > necessary information, that is if i try to asyncsubmit the UsbIrp
> to
> >> >> > the
> >> >> > pipe, i get a message saying " cannot submit: isComplete is true" .
> >> >> > Do i
> >> >> > need to create a new UsbIrp everytime i have to submit to the pipe?
> >> >>
> >> >> short answer: yes.
> >> >>
> >> >> long answer: you can "clear" the irp's fields if you really want to
> >> >> reuse it. But it's much faster and easier to just create a new one -
> >> >> java has very good GC these days.
> >> >>
> >> >> >
> >> >> > Thank you!
> >> >> > Regards
> >> >> > Rahul Bourothu
> >> >> >
> >> >> >
> >> >> > On 8/12/08, Dan Streetman <[EMAIL PROTECTED]> wrote:
> >> >> >>
> >> >> >> I can't help with figuring out the protocol for your device, but I
> >> >> >> would suggest that you read the javadoc for UsbControlIrp and
> UsbIrp
> >> >> >> so you will know how to use them for input and
> output. Specifically
> >> >> >> the input data will not get filled up if you leave it empty; but
> you
> >> >> >> really should read all the javadoc to understand it - it's really
> >> >> >> not
> >> >> >> that much.
> >> >> >>
> >> >> >> On Thu, Aug 7, 2008 at 2:38 PM, Bourothu Rahul
> >> >> >> <[EMAIL PROTECTED]>
> >> >> >> wrote:
> >> >> >> > Hi,
> >> >> >> >
> >> >> >> > I am using a USB RFID Reader to read the EPC code associated
> with
> >> >> >> > a
> >> >> >> > RFID
> >> >> >> > tag
> >> >> >> > on a Linux platform(using JSR80). The device uses ByteStream
> >> >> >> > Protocol
> >> >> >> > to
> >> >> >> > communicate with the host. This protocol requires use of HID
> >> >> >> > Report
> >> >> >> > number
> >> >> >> > 1.
> >> >> >> > The read tag command as provided in the device specification is
> :
> >> >> >> > <01><00><06><22><A0><85><00>
> >> >> >> >
> >> >> >> > I believe I have to use SET_REPORT(to send control) and
> >> >> >> > GET_REPORT(to
> >> >> >> > recieve data) to enable communication.
> >> >> >> >
> >> >> >> > In order to issue the read tag command, i am using the following
> >> >> >> > header
> >> >> >> > values(from the usb 1.1 HID specification):
> >> >> >> >
> >> >> >> > bmRequestType: 0x21
> >> >> >> > bRequest: 0x09 (SET_REPORT, to the device)
> >> >> >> > wValue: 0x0201 (<I/O Type><Report Number>)
> >> >> >> > wIndex: 0x0000 (Interface number)
> >> >> >> > wLength: 0x07 (Number of Bytes to send to the
> >> >> >> > device)
> >> >> >> > Data: <01><00><06><22><A0><85><00>
> >> >> >> >
> >> >> >> > I wrap this data in a UsbControlIrp, and send it to the device
> >> >> >> > using
> >> >> >> > syncSubmit method.
> >> >> >> >
> >> >> >> > Later i have to read the report from the device using
> GET_REPORT.
> >> >> >> > For
> >> >> >> > this I
> >> >> >> > would use the headers as follows:
> >> >> >> > (The INPUT Report from the device would be of size 22 bytes)
> >> >> >> > bmRequestType: 0xA1
> >> >> >> > bRequest: 0x01 (GET_REPORT, from the device)
> >> >> >> > wValue: 0x0101 (<I/O Type><Report Number>)
> >> >> >> > wIndex: 0x0000 (Interface number)
> >> >> >> > wLength: 0x16 (Number of Bytes to be recieved from
> >> >> >> > the
> >> >> >> > device,
> >> >> >> > 22 in HEX)
> >> >> >> > Data: <empty> < I assume the data read from
> the
> >> >> >> > device
> >> >> >> > will be stored here>
> >> >> >> >
> >> >> >> > I again wrap this data in a UsbControlIrp and send it to the
> >> >> >> > device
> >> >> >> > using
> >> >> >> > syncSubmit method.
> >> >> >> > Is my approach correct or am I going wrong somewhere?
> >> >> >> >
> >> >> >> > Please let me know!
> >> >> >> >
> >> >> >> > Thank You
> >> >> >> > Regards
> >> >> >> > Rahul Bourothu
> >> >> >> >
> >> >> >> >
> >> >> >> >
> >> >> >> >
> -------------------------------------------------------------------------
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> >> >> >> > the
> >> >> >> > world
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> >> >> >> > _______________________________________________
> >> >> >> > javax-usb-devel mailing list
> >> >> >> > javax-usb-devel@lists.sourceforge.net
> >> >> >> > https://lists.sourceforge.net/lists/listinfo/javax-usb-devel
> >> >> >> >
> >> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> > --
> >> >> > Rahul Bourothu
> >> >> > School of Engineering and Applied Science,
> >> >> > University of Pennsylvania,
> >> >> > Philadelphia, PA - 19104
> >> >> >
> >> >> >
> >> >> >
> -------------------------------------------------------------------------
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> the
> >> >> > world
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> >> >> > _______________________________________________
> >> >> > javax-usb-devel mailing list
> >> >> > javax-usb-devel@lists.sourceforge.net
> >> >> > https://lists.sourceforge.net/lists/listinfo/javax-usb-devel
> >> >> >
> >> >> >
> >> >
> >> >
> >> >
> >> > --
> >> > Rahul Bourothu
> >> > School of Engineering and Applied Science,
> >> > University of Pennsylvania,
> >> > Philadelphia, PA - 19104
> >> >
> >> >
> -------------------------------------------------------------------------
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> >> > world
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> >> > _______________________________________________
> >> > javax-usb-devel mailing list
> >> > javax-usb-devel@lists.sourceforge.net
> >> > https://lists.sourceforge.net/lists/listinfo/javax-usb-devel
> >> >
> >> >
> >
> >
> >
> > --
> > Rahul Bourothu
> > School of Engineering and Applied Science,
> > University of Pennsylvania,
> > Philadelphia, PA - 19104
> > -------------------------------------------------------------------------
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> > _______________________________________________
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> > javax-usb-devel@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/javax-usb-devel
> >
> >
>
--
Rahul Bourothu
School of Engineering and Applied Science,
University of Pennsylvania,
Philadelphia, PA - 19104
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