Android Open Source - android-weather-station Connected Usb Device

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Back to project page android-weather-station.

License

The source code is released under:

Apache License

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Java Source Code

package de.grundid.weather.io;
//w w  w .  j  a  va  2  s. co  m
import android.hardware.usb.UsbConstants;
import android.hardware.usb.UsbDeviceConnection;
import android.hardware.usb.UsbEndpoint;
import android.hardware.usb.UsbInterface;

public class ConnectedUsbDevice {

  private UsbDeviceConnection connection;
  private UsbInterface usbInterface;
  private UsbEndpoint in;
  private UsbEndpoint out;

  public ConnectedUsbDevice(UsbDeviceConnection connection, UsbInterface usbInterface) {
    this.connection = connection;
    this.usbInterface = usbInterface;
    initConnection(connection);
    int endPoints = usbInterface.getEndpointCount();
    int interfaceProtocol = usbInterface.getInterfaceProtocol();
    System.out.println("EndPoints: " + endPoints + " | interfaces: " + interfaceProtocol);
    out = usbInterface.getEndpoint(1);
    in = usbInterface.getEndpoint(2);
    for (int x = 0; x < endPoints; x++) {
      UsbEndpoint endpoint = usbInterface.getEndpoint(x);
      boolean bulk = endpoint.getType() == UsbConstants.USB_ENDPOINT_XFER_BULK;
      boolean crtl = endpoint.getType() == UsbConstants.USB_ENDPOINT_XFER_CONTROL;
      boolean inDir = endpoint.getDirection() == UsbConstants.USB_DIR_IN;
      boolean outDir = endpoint.getDirection() == UsbConstants.USB_DIR_OUT;
      System.out.println("ID: " + x + " Bulk: " + bulk + " Ctrl: " + crtl + " Out: " + outDir + " In: " + inDir);
    }
  }

  private void initConnection(UsbDeviceConnection connection) {
    connection.controlTransfer(0x40, 0, 0, 0, null, 0, 0);// reset
    // mConnection.controlTransfer(040,
    // 0, 1, 0, null, 0,
    // 0);//clear Rx
    connection.controlTransfer(0x40, 0, 2, 0, null, 0, 0);// clear Tx
    connection.controlTransfer(0x40, 0x02, 0x0000, 0, null, 0, 0);// flow control none
    connection.controlTransfer(0x40, 0x03, 0x4138, 0, null, 0, 0);//baudrate 9600
    //    connection.controlTransfer(0x40, 0x03, 0x0034, 0, null, 0, 0);// baudrate 57600
    //    connection.controlTransfer(0x40, 0x04, 0x0008, 0, null, 0, 0);// data bit 8, parity none, stop bit 1, tx off
  }

  public int send(byte[] buffer, int timeout) {
    return connection.bulkTransfer(out, buffer, buffer.length, timeout);
  }

  public int receive(byte[] buffer, int timeout) {
    return connection.bulkTransfer(in, buffer, buffer.length, timeout);
  }

  public void releaseDevice() {
    connection.releaseInterface(usbInterface);
    connection.close();
  }
}

Java Source Code List