Android Open Source - UsbSerial B L E D112 Serial Device

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License

The source code is released under:

MIT License

Java Source Code

package com.felhr.usbserial;
/*ww w. j a  va2  s.  com*/
import android.hardware.usb.UsbConstants;
import android.hardware.usb.UsbDevice;
import android.hardware.usb.UsbDeviceConnection;
import android.hardware.usb.UsbEndpoint;
import android.hardware.usb.UsbInterface;
import android.hardware.usb.UsbRequest;
import android.util.Log;

@Deprecated
public class BLED112SerialDevice extends UsbSerialDevice
{
  private static final String CLASS_ID = BLED112SerialDevice.class.getSimpleName();
  
  private static final int BLED112_REQTYPE_HOST2DEVICE = 0x21;
  private static final int BLED112_REQTYPE_DEVICE2HOST = 0xA1;
  
  private static final int BLED112_SET_LINE_CODING = 0x20;
  private static final int BLED112_GET_LINE_CODING = 0x21;
  private static final int BLED112_SET_CONTROL_LINE_STATE = 0x22;
  
  /***
   *  Default Serial Configuration
   *  Baud rate: 115200
   *  Data bits: 8
   *  Stop bits: 1
   *  Parity: None
   *  Flow Control: Off
   */
  private static final byte[] BLED112_DEFAULT_LINE_CODING = new byte[] {
    (byte) 0x00, // Offset 0:4 dwDTERate
    (byte) 0x01,
    (byte) 0xC2,
    (byte) 0x00,
    (byte) 0x00, // Offset 5 bCharFormat (1 Stop bit)
    (byte) 0x00, // bParityType (None)
    (byte) 0x08  // bDataBits (8)
  };
  
  private static final int BLED112_DEFAULT_CONTROL_LINE = 0x0003;
  private static final int BLED112_DISCONNECT_CONTROL_LINE = 0x0002;
  
  private UsbInterface mInterface;
  private UsbEndpoint inEndpoint;
  private UsbEndpoint outEndpoint;
  private UsbRequest requestIN;
  
  @Deprecated
  public BLED112SerialDevice(UsbDevice device, UsbDeviceConnection connection) 
  {
    super(device, connection);
  }

  @Override
  public boolean open() 
  {
    // Restart the working thread if it has been killed before and  get and claim interface
    restartWorkingThread();
    restartWriteThread();
    mInterface = device.getInterface(1); // BLED112 Interface 0: Communications | Interface 1: CDC Data

    if(connection.claimInterface(mInterface, true))
    {
      Log.i(CLASS_ID, "Interface succesfully claimed");
    }else
    {
      Log.i(CLASS_ID, "Interface could not be claimed");
    }

    // Assign endpoints
    int numberEndpoints = mInterface.getEndpointCount();
    for(int i=0;i<=numberEndpoints-1;i++)
    {
      UsbEndpoint endpoint = mInterface.getEndpoint(i);
      if(endpoint.getType() == UsbConstants.USB_ENDPOINT_XFER_BULK
          && endpoint.getDirection() == UsbConstants.USB_DIR_IN)
      {
        inEndpoint = endpoint;
      }else
      {
        outEndpoint = endpoint;
      }
    }
    
    // Default Setup
    setControlCommand(BLED112_SET_LINE_CODING, 0, BLED112_DEFAULT_LINE_CODING);
    setControlCommand(BLED112_SET_CONTROL_LINE_STATE, BLED112_DEFAULT_CONTROL_LINE, null);
    
    // Initialize UsbRequest
    requestIN = new UsbRequest();
    requestIN.initialize(connection, inEndpoint);

    // Pass references to the threads
    setThreadsParams(requestIN, outEndpoint);
    
    return true;
  }

  @Override
  public void close() 
  {
    setControlCommand(BLED112_SET_CONTROL_LINE_STATE, BLED112_DISCONNECT_CONTROL_LINE , null);
    killWorkingThread();
    killWriteThread();
    connection.close();
  }

  @Override
  public void setBaudRate(int baudRate) 
  {
    byte[] data = getLineCoding();
    
    data[3] = (byte) (baudRate & 0xff);
    data[2] = (byte) (baudRate >> 8 & 0xff);
    data[1] = (byte) (baudRate >> 16 & 0xff);
    data[0] = (byte) (baudRate >> 24 & 0xff);
    
    setControlCommand(BLED112_SET_LINE_CODING, 0, data);
  }

  @Override
  public void setDataBits(int dataBits)
  {
    byte[] data = getLineCoding();
    switch(dataBits)
    {
    case UsbSerialInterface.DATA_BITS_5:
      data[6] = 0x05;
      break;
    case UsbSerialInterface.DATA_BITS_6:
      data[6] = 0x06;
      break;
    case UsbSerialInterface.DATA_BITS_7:
      data[6] = 0x07;
      break;
    case UsbSerialInterface.DATA_BITS_8:
      data[6] = 0x08;
      break;
    }
    
    setControlCommand(BLED112_SET_LINE_CODING, 0, data);
    
  }

  @Override
  public void setStopBits(int stopBits) 
  {
    byte[] data = getLineCoding();
    switch(stopBits)
    {
    case UsbSerialInterface.STOP_BITS_1:
      data[4] = 0x00;
      break;
    case UsbSerialInterface.STOP_BITS_15:
      data[4] = 0x01;
      break;
    case UsbSerialInterface.STOP_BITS_2:
      data[4] = 0x02;
      break;
    }
    
    setControlCommand(BLED112_SET_LINE_CODING, 0, data);
    
    
  }

  @Override
  public void setParity(int parity) 
  {
    byte[] data = getLineCoding();
    switch(parity)
    {
    case UsbSerialInterface.PARITY_NONE:
      data[5] = 0x00;
      break;
    case UsbSerialInterface.PARITY_ODD:
      data[5] = 0x01;
      break;
    case UsbSerialInterface.PARITY_EVEN:
      data[5] = 0x02;
      break;
    case UsbSerialInterface.PARITY_MARK:
      data[5] = 0x03;
      break;
    case UsbSerialInterface.PARITY_SPACE:
      data[5] = 0x04;
      break;
    }
    
    setControlCommand(BLED112_SET_LINE_CODING, 0, data);
    
  }

  @Override
  public void setFlowControl(int flowControl) 
  {
    // TODO Auto-generated method stub
    
  }
  
  private int setControlCommand(int request, int value, byte[] data)
  {
    int dataLength = 0;
    if(data != null)
    {
      dataLength = data.length;
    }
    int response = connection.controlTransfer(BLED112_REQTYPE_HOST2DEVICE, request, value, 0, data, dataLength, USB_TIMEOUT);
    Log.i(CLASS_ID,"Control Transfer Response: " + String.valueOf(response));
    return response;
  }
  
  private byte[] getLineCoding()
  {
    byte[] data = new byte[7];
    int response = connection.controlTransfer(BLED112_REQTYPE_DEVICE2HOST, BLED112_GET_LINE_CODING, 0, 0, data, data.length, USB_TIMEOUT);
    Log.i(CLASS_ID,"Control Transfer Response: " + String.valueOf(response));
    return data;
  }
  

}

Java Source Code List

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