I get stuck at reading data from USB pipe.
my program can correctly locate the attached USB device, and print its info as
well.
but, when try to read data from the pipe, nothing happen, what wrong could be..?
how can i debug to see the device received the data from remote wireless device?
tks in advance
john
the output of my program:
----------------------------------------------------------------------------------------
Device endpoint info
Device's getDirection->-128
Device's getType->3
Device's getUsbEndpointDescriptor->bLength : 7
bDescriptorType : 0x05
bEndpointAddress : 0x81
bmAttributes : 0x03
wMaxPacketSize : 64
bInterval : 1
pipe read start
loop= 1
***** but nothing happen after that, just hang.
the partial source code of my program
----------------------------------------------------------------------------------
/* probe=an attached USB interface that is defined and located */
UsbConfiguration config=probe.getActiveUsbConfiguration();
UsbInterface theInterface=config.getUsbInterface((byte)0);
theInterface.claim(new UsbInterfacePolicy(){ public boolean
forceClaim(UsbInterface usbInterface) { return true;} });
UsbEndpoint endpoint=(UsbEndpoint)
theInterface.getUsbEndpoints().get(0);
System.out.println("Device endpoint info\n");
System.out.println("Device's
getDirection->"+endpoint.getDirection());
System.out.println("Device's getType->"+endpoint.getType());
System.out.println("Device's
getUsbEndpointDescriptor->"+endpoint.getUsbEndpointDescriptor());
UsbPipe pipe=endpoint.getUsbPipe();
UsbIrp irp=pipe.createUsbIrp();
byte[] input=new byte[64];
irp.setData(input);
pipe.open();
System.out.println("pipe read start\n");
int loop=0;
outer:while (true) {
loop++;
System.out.println("loop= "+loop);
pipe.syncSubmit(irp);
System.out.println("input 0= "+input[0]);
System.out.println("input 1= "+input[1]);
if (loop==10)
break outer;
irp.setComplete(false);
}
System.out.println("pipe read end\n");
pipe.abortAllSubmissions();
pipe.close();
theInterface.release();
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