Reg: Return Response from Usb Device

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Re: Reg: Return Response from Usb Device

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Re: Reg: Return Response from Usb Device

On Thu, Mar 29, 2012 at 07:18:21AM -0400, Chuck Cook wrote:
> 
> https://github.com/trygvis/javax-usb-libusb1
> 
> You may find something here.  I am not sure how up to date it is.

It's hard to be out of date with a dead specification. It worked for everything I wanted, but I know there's
missing stuff. I'll be happy to accept good patches though.

Building it can be a bit of a pain, stuff that I depended on has changed a lot but it is possible :)

-- 
Trygve

> On 03/29/2012 12:47 AM, Hardik Shah wrote:
> >
> >Hi,
> >
> >I am working on a code which requires communication of java code
> >with usb device. For that I am using javax.usb api
> >
> >I was successfully able to send vendor specific commands that
> >control the usbDevice. Please find below snippet of code
> >
> >byte bmRequestType =  UsbConst.REQUESTTYPE_DIRECTION_OUT |
> >UsbConst.REQUESTTYPE_TYPE_CLASS |
> >UsbConst.REQUESTTYPE_RECIPIENT_INTERFACE;
> >
> >                                byte bRequest = 0x09;
> >
> >                                short wValue = 0x0300
> >
> >                                short wIndex = 0;
> >
> >                                byte[] buffer = {};// propertiary
> >command to be send to usbDevice
> >
> >                                UsbControlIrp usbControlIrp =
> >usbDevice.createUsbControlIrp(bmRequestType, bRequest, wValue,
> >wIndex);
> >
> >                                usbControlIrp.setData(buffer);
> >
> >                                usbDevice.syncSubmit(usbControlIrp);
> >
> >However I come across a situation where I need to get some
> >information back from usbDevice (i.e. I will send some command and
> >device will return the some specific information). In other words,
> >I need to  write some command to the device  and read response for
> >the same. How can I achieve this..?.   A code snippet or  working
> >example  will be helpful.
> >
> >Please find endpoint information
> >
> >                if (t == UsbConst.ENDPOINT_TYPE_INTERRUPT &&
> >ep.getDirection() == UsbConst.ENDPOINT_DIRECTION_IN
> >
> >&& ep.getUsbEndpointDescriptor().bEndpointAddress() ==
> >SCHOMAKER_ENDPOINT_ADDR ) {
> >
> >endptIn = ep;
> >
> >System.out.println("DEBUG AbstractCardReader endpoint is selected " );
> >
> >foundEp = true;
> >
> >                                                                break;
> >
> >Thanks
> >
> >Shah
> >
> >
> >
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