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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