Bulk Transferring

gistfile1.java

    private Runnable mLoop = new Runnable() {
 
        @Override 
        public void run() { 
            UsbDevice dev = sDevice;
            if (dev == null)
                return; 
            UsbManager usbm = (UsbManager) getSystemService(USB_SERVICE);
            UsbDeviceConnection conn = usbm.openDevice(dev);
            l("Interface Count: " + dev.getInterfaceCount());
            l("Using " 
                    + String.format("%04X:%04X", sDevice.getVendorId(),
                            sDevice.getProductId())); 
 
            if (!conn.claimInterface(dev.getInterface(0), true))
                return; 
 
            conn.controlTransfer(0x40, 0, 0, 0, null, 0, 0);// reset
                                                            // mConnection.controlTransfer(0×40, 
                                                            // 0, 1, 0, null, 0, 
                                                            // 0);//clear Rx 
            conn.controlTransfer(0x40, 0, 2, 0, null, 0, 0);// clear Tx
            conn.controlTransfer(0x40, 0x02, 0x0000, 0, null, 0, 0);// flow
                                                                    // control 
                                                                    // none 
            conn.controlTransfer(0x40, 0x03, 0x0034, 0, null, 0, 0);// baudrate
                                                                    // 57600 
            conn.controlTransfer(0x40, 0x04, 0x0008, 0, null, 0, 0);// data bit
                                                                    // 8, parity 
                                                                    // none, 
                                                                    // stop bit 
                                                                    // 1, tx off 
 
            UsbEndpoint epIN = null;
            UsbEndpoint epOUT = null;
 
            byte counter = 0;
 
            UsbInterface usbIf = dev.getInterface(0);
            for (int i = 0; i < usbIf.getEndpointCount(); i++) {
                l("EP: " 
                        + String.format("0x%02X", usbIf.getEndpoint(i)
                                .getAddress()));
                if (usbIf.getEndpoint(i).getType() == UsbConstants.USB_ENDPOINT_XFER_BULK) {
                    l("Bulk Endpoint"); 
                    if (usbIf.getEndpoint(i).getDirection() == UsbConstants.USB_DIR_IN)
                        epIN = usbIf.getEndpoint(i);
                    else 
                        epOUT = usbIf.getEndpoint(i);
                } else { 
                    l("Not Bulk"); 
                } 
            } 
 
            for (;;) {// this is the main loop for transferring 
                try { 
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block 
                    e.printStackTrace();
                } 
                String get = "$fDump G" + "\n";
                l("Sending: " + get);
 
                byte[] by = get.getBytes();
 
                // This is where it sends 
                l("out " + conn.bulkTransfer(epOUT, by, by.length, 500));
 
                // This is where it is meant to receive 
                byte[] buffer = new byte[4096];
 
                StringBuilder str = new StringBuilder();
 
                if (conn.bulkTransfer(epIN, buffer, 4096, 500) >= 0) {
                    for (int i = 2; i < 4096; i++) {
                        if (buffer[i] != 0) {
                            str.append((char) buffer[i]);
                        } else { 
                            l(str);
                            break; 
                        } 
                    } 
 
                } 
                // this shows the complete string 
                l(str);
 
                if (mStop) { 
                    mStopped = true; 
                    return; 
                } 
                l("sent " + counter);
                counter++;
                counter = (byte) (counter % 16);
            } 
        } 
    };