Android Open Source - libaums Scsi Inquiry Response

• Back to Hardware/usb  ↑

From Project

Back to project page libaums.

License

The source code is released under:

Apache License

Java Source Code

/*
 * (C) Copyright 2014 mjahnen <jahnen@in.tum.de>
 *//from ww w. j  a  v  a2s  .c om
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package com.github.mjdev.libaums.driver.scsi.commands;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

/**
 * This class represents the response of a SCSI Inquiry. It holds various
 * information about the mass storage device.
 * <p>
 * This response is received in the data phase.
 * 
 * @author mjahnen
 * @see com.github.mjdev.libaums.driver.scsi.commands.ScsiInquiry
 */
public class ScsiInquiryResponse {

  private byte peripheralQualifier;
  private byte peripheralDeviceType;
  boolean removableMedia;
  byte spcVersion;
  byte responseDataFormat;

  private ScsiInquiryResponse() {

  }

  /**
   * Constructs a new object with the given data.
   * 
   * @param buffer
   *            The data where the {@link #ScsiInquiryResponse()} is located.
   * @return The parsed {@link #ScsiInquiryResponse()}.
   */
  public static ScsiInquiryResponse read(ByteBuffer buffer) {
    ScsiInquiryResponse response = new ScsiInquiryResponse();
    buffer.order(ByteOrder.LITTLE_ENDIAN);
    byte b = buffer.get();
    response.peripheralQualifier = (byte) (b & (byte) 0xe0);
    response.peripheralDeviceType = (byte) (b & (byte) 0x1f);
    response.removableMedia = buffer.get() == 0x80;
    response.spcVersion = buffer.get();
    response.responseDataFormat = (byte) (buffer.get() & (byte) 0x7);
    return response;
  }

  /**
   * 
   * @return Zero if a device is connected to the unit.
   */
  public byte getPeripheralQualifier() {
    return peripheralQualifier;
  }

  /**
   * The type of the mass storage device.
   * 
   * @return Zero for a direct access block device.
   */
  public byte getPeripheralDeviceType() {
    return peripheralDeviceType;
  }

  /**
   * 
   * @return True if the media can be removed (eg. card reader).
   */
  public boolean isRemovableMedia() {
    return removableMedia;
  }

  /**
   * This method returns the version of the SCSI Primary Commands (SPC)
   * standard the device supports.
   * 
   * @return Version of the SPC standard
   */
  public byte getSpcVersion() {
    return spcVersion;
  }

  public byte getResponseDataFormat() {
    return responseDataFormat;
  }

  @Override
  public String toString() {
    return "ScsiInquiryResponse [peripheralQualifier=" + peripheralQualifier
        + ", peripheralDeviceType=" + peripheralDeviceType + ", removableMedia="
        + removableMedia + ", spcVersion=" + spcVersion + ", responseDataFormat="
        + responseDataFormat + "]";
  }
}

Java Source Code List

• Back to Hardware/usb  ↑