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 > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great > prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > javax-usb-devel mailing list > javax-usb-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/javax-usb-devel > > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ javax-usb-devel mailing list javax-usb-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/javax-usb-devel
