FTDI デバイスの USB データの読み取りについて投稿された質問を見つけました。 データ転送 USB このコードを大量のデバイスに使用しました。conn.bulkTransfer() が -1 を返すことを除いて、usb を検出できます。
private class UsbRunnable implements Runnable {
private final UsbDevice mDevice;
UsbRunnable(UsbDevice dev) {
mDevice = dev;
}
public void run() {//here the main USB functionality is implemented
UsbDeviceConnection conn = mUsbManager.openDevice(mDevice);
if (!conn.claimInterface(mDevice.getInterface(1), true)) {
l("in run(), no connection");
return;
}
l("in run(), connection");
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, 0xC04E, 0, null, 0, 0);// baudrate
// 38400
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;
//conn.bulkTransfer(epOUT, new byte[]{msData}, 1, 0);
UsbInterface usbIf = mDevice.getInterface(0);
for (int i = 0; i < usbIf.getEndpointCount(); i++) {
l("EP: "
+ String.format("0x%02X", usbIf.getEndpoint(i)
.getAddress()));
l("Type:"+usbIf.getEndpoint(i).getType());
if (usbIf.getEndpoint(i).getType() == UsbConstants.USB_ENDPOINT_XFER_INT) {
l("Bulk Endpoint");
l("direction: "+usbIf.getEndpoint(i).getDirection());
if (usbIf.getEndpoint(i).getDirection() == UsbConstants.USB_DIR_IN)
epIN = usbIf.getEndpoint(i);
}
else l("no bulk");
l("epIN: "+epIN.toString());
}
for (;;) {// this is the main loop for transferring
try {
Thread.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// This is where it is meant to receive
byte[] buffer = new byte[38400];
StringBuilder str = new StringBuilder();
l("bulk transfer thing: " + conn.bulkTransfer(epIN, buffer, 38400, 1000));
if (conn.bulkTransfer(epIN, buffer, 38400, 1000) > 0 ) {
l("bulk transfer is success");
for (int i = 2; i < 64; i++) {
if (buffer[i] != 0) {
str.append((char) buffer[i]);
} else {
l(str);
break;
}
}
}
// this shows the complete string
l(str);
if (mStop) {
mConnectionHandler.onUsbStopped();
return;
}
l("sent " + counter);
counter++;
counter = (byte) (counter % 16);
}
}
}
// END MAIN LOOP
private BroadcastReceiver mPermissionReceiver = new PermissionReceiver(
new IPermissionListener() {
public void onPermissionDenied(UsbDevice d) {
l("Permission denied on " + d.getDeviceId());
}
});
private static interface IPermissionListener {
void onPermissionDenied(UsbDevice d);
}
public final static String TAG = "USBController";
private void l(Object msg) {
Log.d(TAG, ">==< " + msg.toString() + " >==<");
}
private void e(Object msg) {
Log.e(TAG, ">==< " + msg.toString() + " >==<");
}
どのような変更を加える必要があるか誰か教えてもらえますか? 前もって感謝します。