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[/] [usb_fpga_1_11/] [trunk/] [java/] [ztex/] [Ztex1v1.java] - Blame information for rev 2

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/*!
   Java Driver API for the ZTEX Firmware Kit
   Copyright (C) 2009-2010 ZTEX e.K.
   http://www.ztex.de
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 3 as
   published by the Free Software Foundation.
 
   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program; if not, see http://www.gnu.org/licenses/.
!*/
 
/*
    Functions for USB devices with ZTEX descriptor 1, Interface 1
    Interface capabilities and vendor requests (VR) / commands (VC):
    0.0  : EEPROM support
        VR 0x38 : read from EEPROM
            Returns:
                EEPROM data
        VC 0x39 : write to EEPROM
        VR 0x3a : EEPROM state
            Returns:
                Offs    Description
                0-1     bytes written
                2       checksum
                3       0:idle, 1:busy or error
 
    0.1  : FPGA Configuration
        VR 0x30 : get FPGA state
            Returns:
                Offs    Description
 
                1       checksum
                2-5     transferred bytes
                6       INIT_B state
        VC 0x31 : reset FPGA
        VC 0x32 : send FPGA configuration data (Bitstream)
 
    0.2  : Flash memory support
        VR 0x40 : Flash state
            Returns:
                Offs    Description
 
                1-2     Sector size
                3-6     Number of sectors
                7       Error code
        VR 0x41 : read from Flash
        VR 0x42 : write to Flash
*/
package ztex;
 
import java.io.*;
import java.util.*;
 
import ch.ntb.usb.*;
 
/**
  * This class implements the communication protocol of the interface version 1 for the interaction with the ZTEX firmware.
  * <p>
  * The features supported by this interface can be accessed via vendor commands and vendor requests via Endpoint 0.
  * Each feature can be enabled or disabled by the firmware and also depends from the hardware.
  * The presence of a feature is indicated by a 1 in the corresponding feature bit of the ZTEX descriptor 1, see {@link ZtexDevice1}.
  * The following table gives an overview about the features
  * <table bgcolor="#404040" cellspacing=1 cellpadding=10>
  *   <tr>
  *     <td bgcolor="#d0d0d0" valign="bottom"><b>Capability bit</b></td>
  *     <td bgcolor="#d0d0d0" valign="bottom"><b>Description</b></td>
  *   </tr>
  *   <tr>
  *     <td bgcolor="#ffffff" valign="top">0.0</td>
  *     <td bgcolor="#ffffff" valign="top" colspan=2>
  *       EEPROM support<p>
  *       <table bgcolor="#404040" cellspacing=1 cellpadding=6>
  *         <tr>
  *           <td bgcolor="#d0d0d0" valign="bottom"><b>Vendor request (VR)<br> or command (VC)</b></td>
  *           <td bgcolor="#d0d0d0" valign="bottom"><b>Description</b></td>
  *         </tr>
  *         <tr>
  *           <td bgcolor="#ffffff" valign="top">VR 0x38</td>
  *           <td bgcolor="#ffffff" valign="top">Read from EEPROM</td>
  *         </tr>
  *         <tr>
  *           <td bgcolor="#ffffff" valign="top">VC 0x39</td>
  *           <td bgcolor="#ffffff" valign="top">Write to EEPROM</td>
  *         </tr>
  *         <tr>
  *           <td bgcolor="#ffffff" valign="top">VR 0x3a</td>
  *           <td bgcolor="#ffffff" valign="top">Get EEPROM state. Returns:
  *             <table bgcolor="#404040" cellspacing=1 cellpadding=4>
  *               <tr>
  *                 <td bgcolor="#d0d0d0" valign="bottom"><b>Bytes</b></td>
  *                 <td bgcolor="#d0d0d0" valign="bottom"><b>Description</b></td>
  *               </tr>
  *               <tr>
  *                 <td bgcolor="#ffffff" valign="top">0-1</td>
  *                 <td bgcolor="#ffffff" valign="top">Number of bytes written.</td>
  *               </tr>
  *               <tr>
  *                 <td bgcolor="#ffffff" valign="top">2</td>
  *                 <td bgcolor="#ffffff" valign="top">Checksum</td>
  *               </tr>
  *               <tr>
  *                 <td bgcolor="#ffffff" valign="top">3</td>
  *                 <td bgcolor="#ffffff" valign="top">0:idle, 1:busy or error</td>
  *               </tr>
  *             </table>
  *           </td>
  *         </tr>
  *       </table>
  *     </td>
  *   </tr>
  *   <tr>
  *     <td bgcolor="#ffffff" valign="top">0.1</td>
  *     <td bgcolor="#ffffff" valign="top" colspan=2>
  *       FPGA Configuration<p>
  *       <table bgcolor="#404040" cellspacing=1 cellpadding=6>
  *         <tr>
  *           <td bgcolor="#d0d0d0" valign="bottom"><b>Vendor request (VR)<br> or command (VC)</b></td>
  *           <td bgcolor="#d0d0d0" valign="bottom"><b>Description</b></td>
  *         </tr>
  *         <tr>
  *           <td bgcolor="#ffffff" valign="top">VR 0x30</td>
  *           <td bgcolor="#ffffff" valign="top">Get FPGA state. Returns:
  *             <table bgcolor="#404040" cellspacing=1 cellpadding=4>
  *               <tr>
  *                 <td bgcolor="#d0d0d0" valign="bottom"><b>Bytes</b></td>
  *                 <td bgcolor="#d0d0d0" valign="bottom"><b>Description</b></td>
  *               </tr>
  *               <tr>
  *                 <td bgcolor="#ffffff" valign="top">0</td>
  *                 <td bgcolor="#ffffff" valign="top">1: unconfigured, 0:configured</td>
  *               </tr>
  *               <tr>
  *                 <td bgcolor="#ffffff" valign="top">1</td>
  *                 <td bgcolor="#ffffff" valign="top">Checksum</td>
  *               </tr>
  *               <tr>
  *                 <td bgcolor="#ffffff" valign="top">2-5</td>
  *                 <td bgcolor="#ffffff" valign="top">Number of bytes transferred.</td>
  *               </tr>
  *               <tr>
  *                 <td bgcolor="#ffffff" valign="top">6</td>
  *                 <td bgcolor="#ffffff" valign="top">INIT_B states (Must be 222).</td>
  *               </tr>
  *             </table>
  *           </td>
  *         </tr>
  *         <tr>
  *           <td bgcolor="#ffffff" valign="top">VC 0x31</td>
  *           <td bgcolor="#ffffff" valign="top">Reset FPGA</td>
  *         </tr>
  *         <tr>
  *           <td bgcolor="#ffffff" valign="top">VR 0x32</td>
  *           <td bgcolor="#ffffff" valign="top">Send Bitstream</td>
  *         </tr>
  *       </table>
  *     </td>
  *   </tr>
  *   <tr>
  *     <td bgcolor="#ffffff" valign="top">0.2</td>
  *     <td bgcolor="#ffffff" valign="top" colspan=2>
  *       Flash memory support<p>
  *       <table bgcolor="#404040" cellspacing=1 cellpadding=6>
  *         <tr>
  *           <td bgcolor="#d0d0d0" valign="bottom"><b>Vendor request (VR)<br> or command (VC)</b></td>
  *           <td bgcolor="#d0d0d0" valign="bottom"><b>Description</b></td>
  *         </tr>
  *         <tr>
  *           <td bgcolor="#ffffff" valign="top">VR 0x40</td>
  *           <td bgcolor="#ffffff" valign="top">Get Flash state. Returns:
  *             <table bgcolor="#404040" cellspacing=1 cellpadding=4>
  *               <tr>
  *                 <td bgcolor="#d0d0d0" valign="bottom"><b>Bytes</b></td>
  *                 <td bgcolor="#d0d0d0" valign="bottom"><b>Description</b></td>
  *               </tr>
  *               <tr>
  *                 <td bgcolor="#ffffff" valign="top">0</td>
  *                 <td bgcolor="#ffffff" valign="top">1:enabled, 0:disabled</td>
  *               </tr>
  *               <tr>
  *                 <td bgcolor="#ffffff" valign="top">1-2</td>
  *                 <td bgcolor="#ffffff" valign="top">Sector size</td>
  *               </tr>
  *               <tr>
  *                 <td bgcolor="#ffffff" valign="top">3-6</td>
  *                 <td bgcolor="#ffffff" valign="top">Number of sectors</td>
  *               </tr>
  *               <tr>
  *                 <td bgcolor="#ffffff" valign="top">7</td>
  *                 <td bgcolor="#ffffff" valign="top">Error code</td>
  *               </tr>
  *             </table>
  *           </td>
  *         </tr>
  *         <tr>
  *           <td bgcolor="#ffffff" valign="top">VR 0x41</td>
  *           <td bgcolor="#ffffff" valign="top">Read one sector from Flash</td>
  *         </tr>
  *         <tr>
  *           <td bgcolor="#ffffff" valign="top">VC 0x42</td>
  *           <td bgcolor="#ffffff" valign="top">Write one sector to Flash</td>
  *         </tr>
  *       </table>
  *     </td>
  *   </tr>
  * </table>
  * @see ZtexDevice1
  * @see Ztex1
  */
 
public class Ztex1v1 extends Ztex1 {
    /** * The names of the capabilities */
    public static final String capabilityStrings[] = {
        "EEPROM read/write" ,
        "FPGA configuration" ,
        "Flash memory support"
    };
 
    private boolean fpgaConfigured = false;
    private int fpgaChecksum = 0;
    private int fpgaBytes = 0;
    private int fpgaInitB = 0;
    private int fpgaFlashResult = 255;
    private boolean fpgaFlashBitSwap = false;
 
    /** * Number of bytes written to EEPROM. (Obtained by {@link #eepromState()}.) */
    public int eepromBytes = 0;
    /** * Checksum of the last EEPROM transfer. (Obtained by {@link #eepromState()}.) */
    public int eepromChecksum = 0;
 
    private int flashEnabled = -1;
    private int flashSectorSize = -1;
    private int flashSectors = -1;
 
    /** * Last Flash error code obtained by {@link #flashState()}. See FLASH_EC_* for possible error codes. */
    public int flashEC = 0;
    /** * Means no error. */
    public static final int FLASH_EC_NO_ERROR = 0;
    /** * Signals an error while attempting to execute a command. */
    public static final int FLASH_EC_CMD_ERROR = 1;
    /** * Signals that a timeout occurred. */
    public static final int FLASH_EC_TIMEOUT = 2;
    /** * Signals that Flash memory it busy. */
    public static final int FLASH_EC_BUSY = 3;
    /** * Signals that another Flash operation is pending. */
    public static final int FLASH_EC_PENDING = 4;
    /** * Signals an error while attempting to read from Flash. */
    public static final int FLASH_EC_READ_ERROR = 5;
    /** * Signals an error while attempting to write to Flash. */
    public static final int FLASH_EC_WRITE_ERROR = 6;
    /** * Signals the the installed Flash memeory is not supported. */
    public static final int FLASH_EC_NOTSUPPORTED = 7;
 
// ******* Ztex1v1 *************************************************************
/**
  * Constructs an instance from a given device.
  * @param pDev The given device.
  * @throws UsbException if an communication error occurred.
  */
    public Ztex1v1 ( ZtexDevice1 pDev ) throws UsbException {
        super ( pDev );
    }
 
// ******* valid ***************************************************************
/**
  * Returns true if ZTEX interface 1 is available.
  * @return true if ZTEX interface 1 is available.
  */
    public boolean valid ( ) {
        return dev().valid() && dev().interfaceVersion()==1;
    }
 
/**
  * Returns true if ZTEX interface 1 and capability i.j are available.
  * @param i byte index of the capability
  * @param j bit index of the capability
  * @return true if ZTEX interface 1 and capability i.j are available.
  */
    public boolean valid ( int i, int j) {
        return dev().valid() && dev().interfaceVersion()==1 && dev().interfaceCapabilities(i,j);
    }
 
// ******* compatible **********************************************************
/**
  * Checks whether the given product ID is compatible to the device corresponding to this class and whether interface 1 is supported.<br>
  * The given product ID is compatible
  * <pre>if ( this.productId(0)==0 || productId0<=0 || this.productId(0)==productId0 ) &&
   ( this.productId(0)==0 || productId1<=0 || this.productId(1)==productId1 ) &&
   ( this.productId(2)==0 || productId2<=0 || this.productId(2)==productId2 ) &&
   ( this.productId(3)==0 || productId3<=0 || this.productId(3)==productId3 ) </pre>
  * @param productId0 Byte 0 of the given product ID
  * @param productId1 Byte 1 of the given product ID
  * @param productId2 Byte 2 of the given product ID
  * @param productId3 Byte 3 of the given product ID
  * @return true if the given product ID is compatible and interface 1 is supported.
  */
    public boolean compatible ( int productId0, int productId1, int productId2, int productId3 ) {
        return dev().valid() && dev().compatible ( productId0, productId1, productId2, productId3 ) && dev().interfaceVersion()==1;
    }
 
// ******* checkValid **********************************************************
/**
  * Checks whether ZTEX descriptor 1 is available and interface 1 is supported.
  * @throws InvalidFirmwareException if ZTEX descriptor 1 is not available or interface 1 is not supported.
  */
    public void checkValid () throws InvalidFirmwareException {
        super.checkValid();
        if ( dev().interfaceVersion() != 1 )
            throw new InvalidFirmwareException(this, "Wrong interface: " + dev().interfaceVersion() + ", expected: 1" );
    }
 
// ******* checkCapability *****************************************************
/**
  * Checks whether ZTEX descriptor 1 is available and interface 1 and a given capability are supported.
  * @param i byte index of the capability
  * @param j bit index of the capability
  * @throws InvalidFirmwareException if ZTEX descriptor 1 is not available or interface 1 is not supported.
  * @throws CapabilityException if the given capability is not supported.
  */
    public void checkCapability ( int i, int j ) throws InvalidFirmwareException, CapabilityException {
        checkValid();
        if ( ! dev().interfaceCapabilities(i,j) ) {
            int k = i*8 + j;
            if ( k>=0 && k<capabilityStrings.length )
            throw new CapabilityException( this, ( k>=0 && k<=capabilityStrings.length ) ? capabilityStrings[k] : ("Capabilty " + i + "," + j) );
        }
    }
 
// ******* checkCompatible *****************************************************
/**
  * Checks whether the given product ID is compatible to the device corresponding to this class and whether interface 1 is supported.
  * See {@link #compatible(int,int,int,int)}.
  * @param productId0 Byte 0 of the given product ID
  * @param productId1 Byte 1 of the given product ID
  * @param productId2 Byte 2 of the given product ID
  * @param productId3 Byte 3 of the given product ID
  * @throws InvalidFirmwareException if the given product ID is not compatible or interface 1 is not supported.
  */
    public void checkCompatible ( int productId0, int productId1, int productId2, int productId3 ) throws InvalidFirmwareException {
        checkValid();
        if ( ! dev().compatible ( productId0, productId1, productId2, productId3 ) )
            throw new InvalidFirmwareException(this, "Incompatible Product ID");
    }
 
// ******* getFpgaState ********************************************************
    private void getFpgaState () throws UsbException, InvalidFirmwareException, CapabilityException {
        byte[] buffer = new byte[9];
        checkCapability(0,1);
        vendorRequest2(0x30, "getFpgaState", buffer, 9);
        fpgaConfigured = buffer[0] == 0;
        fpgaChecksum = buffer[1] & 0xff;
        fpgaBytes = ((buffer[5] & 0xff)<<24) | ((buffer[4] & 0xff)<<16) | ((buffer[3] & 0xff)<<8) | (buffer[2] & 0xff);
        fpgaInitB = buffer[6] & 0xff;
        fpgaFlashResult = buffer[7];
        fpgaFlashBitSwap = buffer[8] != 0;
    }
 
// ******* printFpgaState ******************************************************
/**
  * Prints out the FPGA state.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if FPGA configuration is not supported by the firmware.
  */
    public void printFpgaState () throws UsbException, InvalidFirmwareException, CapabilityException {
        getFpgaState();
        System.out.println( "size=" + fpgaBytes + ";  checksum=" + fpgaChecksum + "; INIT_B_HIST=" + fpgaInitB +" (should be 222); flash_configuration_result=" + fpgaFlashResult );
    }
 
// ******* getFpgaConfiguration ************************************************
/**
  * Returns true if the FPGA is configured.
  * @return true if the FPGA is configured.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if FPGA configuration is not supported by the firmware.
  */
    public boolean getFpgaConfiguration () throws UsbException, InvalidFirmwareException, CapabilityException {
        getFpgaState ();
        return fpgaConfigured;
    }
 
// ******* getFpgaConfigurationStr *********************************************
/**
  * Returns a string that indicates the FPGA configuration status.
  * @return a string that indicates the FPGA configuration status.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if FPGA configuration is not supported by the firmware.
  */
    public String getFpgaConfigurationStr () throws UsbException, InvalidFirmwareException, CapabilityException {
        getFpgaState ();
        return fpgaConfigured ? "FPGA configured" : "FPGA unconfigured";
    }
 
// ******* resetFGPA ***********************************************************
/**
  * Resets the FPGA.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if FPGA configuration is not supported by the firmware.
  */
    public void resetFpga () throws UsbException, InvalidFirmwareException, CapabilityException {
        checkCapability(0,1);
        vendorCommand(0x31, "resetFpga" );
    }
 
// ******* configureFpga *******************************************************
//  returns configuration time in ms
/**
  * Upload a Bitstream to the FPGA.
  * @param fwFileName The file name of the Bitstream. The file can be a regular file or a system resource (e.g. a file from the current jar archive).
  * @param force If set to true existing configurations will be overwritten. (By default an {@link AlreadyConfiguredException} is thrown).
  * @throws BitstreamReadException if an error occurred while attempting to read the Bitstream.
  * @throws BitstreamUploadException if an error occurred while attempting to upload the Bitstream.
  * @throws AlreadyConfiguredException if the FPGA is already configured.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if FPGA configuration is not supported by the firmware.
  */
    public long configureFpga ( String fwFileName, boolean force ) throws BitstreamReadException, UsbException, BitstreamUploadException, AlreadyConfiguredException, InvalidFirmwareException, CapabilityException {
        final int transactionBytes = certainWorkarounds ? 256 : 2048;
        long t0 = 0;
 
        checkCapability(0,1);
 
        if ( !force && getFpgaConfiguration() )
            throw new AlreadyConfiguredException();
 
// read the Bitstream file      
        byte[][] buffer = new byte[4*1024*1024/transactionBytes][];
        int size = 0;
        try {
            InputStream inputStream = JInputStream.getInputStream( fwFileName );
            int j = transactionBytes;
            for ( int i=0; i<buffer.length && j==transactionBytes; i++ ) {
                buffer[i] = new byte[transactionBytes];
                j = inputStream.read( buffer[i] );
                if ( j < 0 )
                    j = 0;
                if ( j < transactionBytes && j % 64 == 0 )       // ensures size % 64 != 0
                    j+=1;
                size += j;
            }
 
            try {
                inputStream.close();
            }
            catch ( Exception e ) {
                System.err.println( "Warning: Error closing file " + fwFileName + ": " + e.getLocalizedMessage() );
            }
        }
        catch (IOException e) {
            throw new BitstreamReadException(e.getLocalizedMessage());
        }
        if ( size < 64 || size % 64 == 0 )
            throw new BitstreamReadException("Invalid file size: " + size );
 
// upload the Bitstream file    
        for ( int tries=10; tries>0; tries-- ) {
 
            resetFpga();
 
            try {
                t0 = -new Date().getTime();
                int cs = 0;
                int bs = 0;
 
                for ( int i=0; i<buffer.length && i*transactionBytes < size; i++ ) {
                    int j = size-i*transactionBytes;
                    if (j>transactionBytes)
                        j = transactionBytes;
                    vendorCommand2(0x32, "sendFpgaData", 0,0, buffer[i], j);
 
                    bs+=j;
                    for ( int k=0; k<buffer[i].length; k++ )
                        cs = ( cs + (buffer[i][k] & 0xff) ) & 0xff;
                }
 
                getFpgaState();
//              System.err.println("fpgaConfigred=" + fpgaConfigured + "   fpgaBytes="+fpgaBytes + " ("+bs+")   fpgaChecksum="+fpgaChecksum + " ("+cs+")   fpgaInitB="+fpgaInitB );
                if ( ! fpgaConfigured ) {
                    throw new BitstreamUploadException( "FPGA configuration failed: DONE pin does not go high (size=" + fpgaBytes + " ,  " + (bs - fpgaBytes) + " bytes went lost;  checksum="
                        + fpgaChecksum + " , should be " + cs + ";  INIT_B_HIST=" + fpgaInitB +", should be 222)" );
                }
//              System.out.println( "FPGA configuration: size=" + fpgaBytes + " ,  " + (bs - fpgaBytes) + " bytes went lost;  checksum=" + fpgaChecksum + " , should be " + cs + ";  INIT_B_HIST=" + fpgaInitB +", should be 222" );
//              if ( fpgaInitB != 222 )
//                  System.err.println ( "Warning: FPGA configuration may have failed: DONE pin has gone high but INIT_B states are wrong: " + fpgaInitB +", should be 222");
 
                tries = 0;
                t0 += new Date().getTime();
 
            }
            catch ( BitstreamUploadException e ) {
                if ( tries>1 )
                    System.err.println("Warning: " + e.getLocalizedMessage() +": Retrying it ...");
                else
                    throw e;
            }
        }
 
        try {
            Thread.sleep( 200 );
        }
        catch ( InterruptedException e) {
        }
 
        return t0;
    }
 
// ******* eepromState *********************************************************
// returns true if EEPROM is ready
/**
  * Reads the current EEPROM status.
  * This method also sets the varibles {@link #eepromBytes} and {@link #eepromChecksum}.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if EEPROM access is not supported by the firmware.
  * @return true if EEPROM is ready.
  */
    public boolean eepromState ( ) throws UsbException, InvalidFirmwareException, CapabilityException {
        byte[] buf = new byte[4];
        checkCapability(0,0);
        vendorRequest2(0x3A, "EEPROM State", 0, 0, buf, 4);
        eepromBytes = (buf[0] & 255) | (buf[1] & 255)<<8;
        eepromChecksum = buf[2] & 255;
        return buf[3] == 0;
    }
 
// ******* eepromWrite *********************************************************
/**
  * Writes data to the EEPROM.
  * @param addr The destination address of the EEPROM.
  * @param buf The data.
  * @param length The amount of bytes to be sent.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if EEPROM access is not supported by the firmware.
  */
    public void eepromWrite ( int addr, byte[] buf, int length ) throws UsbException, InvalidFirmwareException, CapabilityException {
        checkCapability(0,0);
        vendorCommand2( 0x39, "EEPROM Write", addr, 0, buf, length );
        try {
            Thread.sleep( 10 );
        }
        catch ( InterruptedException e) {
        }
    }
 
// ******* eepromRead **********************************************************
/**
  * Reads data from the EEPROM.
  * @param addr The source address of the EEPROM.
  * @param buf A buffer for the storage of the data.
  * @param length The amount of bytes to be read.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if EEPROM access is not supported by the firmware.
  */
    public void eepromRead ( int addr, byte[] buf, int length ) throws UsbException, InvalidFirmwareException, CapabilityException {
        checkCapability(0,0);
        vendorRequest2( 0x38, "EEPROM Read", addr, 0, buf, length );             // sometimes a little bit slow
        try {
            Thread.sleep( 10 );
        }
        catch ( InterruptedException e) {
        }
    }
 
// ******* eepromUpload ********************************************************
//  returns upload time in ms
/**
  * Upload the firmware to the EEPROM.
  * In order to start the uploaded firmware the device must be reset.
  * @param ihxFileName The file name of the firmware image in ihx format. The file can be a regular file or a system resource (e.g. a file from the current jar archive).
  * @param force Skips the compatibility check if true.
  * @throws IncompatibleFirmwareException if the given firmware is not compatible to the installed one, see {@link #compatible(int,int,int,int)} (Upload can be enforced using the <tt>force</tt> parameter.)
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws CapabilityException if EEPROM access is not supported by the firmware.
  * @throws FirmwareUploadException if an error occurred while attempting to upload the firmware.
  */
    public long eepromUpload ( String ihxFileName, boolean force ) throws IncompatibleFirmwareException, FirmwareUploadException, InvalidFirmwareException, CapabilityException {
        final int pagesMax = 256;
        final int pageSize = 256;
        int pages = 0;
        byte[][] buffer = new byte[pagesMax][];
 
        checkCapability(0,0);
 
// load the ihx file
        ZtexIhxFile1 ihxFile;
        try {
            ihxFile = new ZtexIhxFile1( ihxFileName );
        }
        catch ( IOException e ) {
            throw new FirmwareUploadException( e.getLocalizedMessage() );
        }
        catch ( IhxFileDamagedException e ) {
            throw new FirmwareUploadException( e.getLocalizedMessage() );
        }
//      ihxFile.dataInfo(System.out);
//      System.out.println(ihxFile);
 
// check for compatibility
        if ( ! force && dev().valid() ) {
            if ( ihxFile.interfaceVersion() != 1 )
                throw new IncompatibleFirmwareException("Wrong interface version: Expected 1, got " + ihxFile.interfaceVersion() );
 
            if ( ! dev().compatible ( ihxFile.productId(0), ihxFile.productId(1), ihxFile.productId(2), ihxFile.productId(3) ) )
                throw new IncompatibleFirmwareException("Incompatible productId's: Current firmware: " + ZtexDevice1.byteArrayString(dev().productId())
                    + "  Ihx File: " + ZtexDevice1.byteArrayString(ihxFile.productId()) );
        }
 
        Usb_Device_Descriptor dd = dev().dev().getDescriptor();
        int vid = dd.getIdVendor() & 65535;
        int pid = dd.getIdProduct() & 65535;
 
        buffer[0] = new byte[pageSize];
        buffer[0][0] = (byte) 0xc2;
        buffer[0][1] = (byte) (vid & 255);
        buffer[0][2] = (byte) ((vid >> 8) & 255);
        buffer[0][3] = (byte) (pid & 255);
        buffer[0][4] = (byte) ((pid >> 8) & 255);
        buffer[0][5] = 0;
        buffer[0][6] = 0;
        buffer[0][7] = 0;
 
        int ptr = 8, i = 0;
 
        while ( i < ihxFile.ihxData.length ) {
            if ( ihxFile.ihxData[i]>=0 && ihxFile.ihxData[i]<256 ) {                     // new data block
                int j = 1;
                while ( i+j<ihxFile.ihxData.length && ihxFile.ihxData[i+j]>=0 && ihxFile.ihxData[i+j]<255 )
                    j++;
 
                for (int k=ptr/pageSize + 1; k < (ptr+j+4)/pageSize + 1; k++ )  // also considers 5 bytes for the last data block
                    buffer[k] = new byte[pageSize];
 
                buffer[(ptr+0)/pageSize][(ptr+0) % pageSize] = (byte) ((j >> 8) & 255);
                buffer[(ptr+1)/pageSize][(ptr+1) % pageSize] = (byte) (j & 255);                // length
                buffer[(ptr+2)/pageSize][(ptr+2) % pageSize] = (byte) ((i >> 8) & 255);
                buffer[(ptr+3)/pageSize][(ptr+3) % pageSize] = (byte) (i & 255);                // address
                ptr+=4;
                for ( int k=0; k<j; k++ )                                        // data
                    buffer[(ptr+k)/pageSize][(ptr+k) % pageSize] = (byte) ihxFile.ihxData[i+k];
                ptr+=j;
                i+=j;
            }
            else {
                i+=1;
            }
        }
 
        buffer[(ptr+0)/pageSize][(ptr+0) % pageSize] = (byte) 0x80;               // last data block
        buffer[(ptr+1)/pageSize][(ptr+1) % pageSize] = (byte) 0x01;
        buffer[(ptr+2)/pageSize][(ptr+2) % pageSize] = (byte) 0xe6;
        buffer[(ptr+3)/pageSize][(ptr+3) % pageSize] = (byte) 0x00;
        buffer[(ptr+3)/pageSize][(ptr+4) % pageSize] = (byte) 0x00;
        ptr+=5;
 
 
        long t0 = new Date().getTime();
        byte[] rbuf = new byte[pageSize];
 
        for ( i=(ptr-1)/pageSize; i>=0; i-- ) {
 
            int k = (i+1)*pageSize < ptr ? pageSize : ptr-i*pageSize;
            int cs = 0;
            for (int j=0; j<k; j++ ) {
                cs = ( cs + (buffer[i][j] & 255) ) & 255;
            }
 
            for ( int tries=3; tries>0; tries-- ) {
                try {
                    eepromWrite(i*pageSize, buffer[i], k);
                    eepromState();
                    if ( eepromBytes!=k )
                        throw new FirmwareUploadException("Error writing data to EEPROM: Wrote " + eepromBytes + " bytes instead of "  + k + " bytes" );
                    if ( eepromChecksum!=cs )
                        throw new FirmwareUploadException("Error writing data to EEPROM: Checksum error");
 
                    eepromRead(i*pageSize, rbuf, k);
                    for (int j=0; j<k; j++ ) {
                        if ( rbuf[j] != buffer[i][j] )
                            throw new FirmwareUploadException("Error writing data to EEPROM: Verification failed");
                    }
                    tries = 0;
                }
                catch ( Exception e ) {
                    if ( tries > 1 ) {
                        System.err.println("Warning: " + e.getLocalizedMessage() +": Retrying it ...");
                    }
                    else {
                        throw new FirmwareUploadException(e.getLocalizedMessage());
                    }
                }
            }
        }
 
        return new Date().getTime() - t0;
    }
 
 
// ******* eepromDisable ********************************************************
/**
  * Disables the firmware stored in the EEPROM.
  * This is achived by writing a "0" to the address 0 of the EEPROM.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws CapabilityException if EEPROM access is not supported by the firmware.
  * @throws FirmwareUploadException if an error occurred while attempting to disable the firmware.
  */
    public void eepromDisable ( ) throws FirmwareUploadException, InvalidFirmwareException, CapabilityException {
        byte[] buf = { 0 };
 
        for ( int tries=3; tries>0; tries-- ) {
            try {
                eepromWrite(0, buf, 1);
 
                eepromRead(0, buf, 1);
                if ( buf[0] != 0 )
                    throw new FirmwareUploadException("Error disabeling EEPROM firmware: Verification failed");
                tries = 0;
 
            }
            catch ( Exception e ) {
                if ( tries > 1 ) {
                    System.err.println("Warning: " + e.getLocalizedMessage() +": Retrying it ...");
                }
                else {
                    throw new FirmwareUploadException(e.getLocalizedMessage());
                }
            }
        }
    }
 
// ******* flashStrError *******************************************************
/**
  * Converts a given error code into a String.
  * @param errNum The error code.
  * @return an error message.
  */
    public static String flashStrError ( int errNum ) {
        switch ( errNum ) {
            case FLASH_EC_NO_ERROR:
                return "USB error: " + LibusbJava.usb_strerror();
            case FLASH_EC_CMD_ERROR:
                return "Command error";
            case FLASH_EC_TIMEOUT:
                return "Timeout error";
            case FLASH_EC_BUSY:
                return "Busy";
            case FLASH_EC_PENDING:
                return "Another operation is pending";
            case FLASH_EC_READ_ERROR:
                return "Read error";
            case FLASH_EC_WRITE_ERROR:
                return "Write error";
            case FLASH_EC_NOTSUPPORTED:
                return "Not supported";
        }
        return "Error " + errNum;
    }
 
/**
  * Gets the last Flash error from the device.
  * @return an error message.
  */
    public String flashStrError ( ) {
        try {
            return flashStrError( getFlashEC() );
        }
        catch ( Exception e ) {
            return "Unknown error (Error receiving errorcode: "+e.getLocalizedMessage() +")";
        }
    }
 
// ******* flashState **********************************************************
/**
  * Reads the the Flash memory status and information.
  * This method also sets the variables {@link #flashEnabled}, {@link #flashSectorSize} and {@link #flashSectors}.
  * @return true if Flash memory is installed.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not supported by the firmware.
  */
    public boolean flashState () throws UsbException, InvalidFirmwareException, CapabilityException {
        byte[] buf = new byte[8];
        checkCapability(0,2);
 
        // device may be busy due to initialization, we try it up to up to 4s
        vendorRequest2(0x40, "Flash State", 0, 0, buf, 8);
        flashEC = buf[7] & 255;
        int tries=20;
        while ( flashEC==FLASH_EC_BUSY && tries>0 )
        {
            try {
                Thread.sleep( 200 );
            }
            catch ( InterruptedException e) {
            }
            tries-=1;
            vendorRequest2(0x40, "Flash State", 0, 0, buf, 8);
            flashEC = buf[7] & 255;
        }
        flashEnabled = buf[0] & 255;
        flashSectorSize = flashEnabled == 1 ? ((buf[2] & 255) << 8) | (buf[1] & 255) : 0;
        flashSectors = flashEnabled == 1 ? ((buf[6] & 255) << 24) | ((buf[5] & 255) << 16) | ((buf[4] & 255) << 8) | (buf[3] & 255) : 0;
        return flashEnabled == 1;
    }
 
// ******* getFlashEC **********************************************************
// reads the current error code
/**
  * Gets the last Flash error from the device.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not supported by the firmware.
  */
    public int getFlashEC () throws UsbException, InvalidFirmwareException, CapabilityException {
        byte[] buf = new byte[8];
        checkCapability(0,2);
        vendorRequest2(0x40, "Flash State", 0, 0, buf, 8);
        flashEC = buf[7] & 255;
        return flashEC;
    }
 
// ******* flashReadSector ****************************************************
// read exactly one sector
/**
  * Reads one sector from the Flash.
  * @param sector The sector number to be read.
  * @param buf A buffer for the storage of the data.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not possible.
  */
    public void flashReadSector ( int sector, byte[] buf ) throws UsbException, InvalidFirmwareException, CapabilityException {
        checkCapability(0,2);
        if ( ! flashEnabled() )
            throw new CapabilityException(this, "No Flash memory installed or");
 
        try {
            vendorRequest2( 0x41, "Flash Read", sector, sector >> 16, buf, flashSectorSize );
        }
        catch ( UsbException e ) {
            throw new UsbException( dev().dev(), "Flash Read: " + flashStrError() );
        }
    }
 
// ******* flashWriteSector ***************************************************
// write exactly one sector
/**
  * Writes one sector to the Flash.
  * @param sector The sector number to be written.
  * @param buf The data.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not possible.
  */
    public void flashWriteSector ( int sector, byte[] buf ) throws UsbException, InvalidFirmwareException, CapabilityException {
        checkCapability(0,2);
        if ( ! flashEnabled() )
            throw new CapabilityException(this, "No Flash memory installed or");
 
        try {
            vendorCommand2( 0x42, "Flash Write", sector, sector >> 16, buf, flashSectorSize );
        }
        catch ( UsbException e ) {
            throw new UsbException( dev().dev(), "Flash Write: " + flashStrError() );
        }
    }
 
// ******* flashEnabled ********************************************************
// returns enabled / disabled state 
/**
  * Returns true if Flash memory is installed.
  * @return true if Flash memory is installed.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not supported by the firmware.
  */
    public boolean flashEnabled () throws UsbException, InvalidFirmwareException, CapabilityException {
        if ( flashEnabled < 0 ) // init variable
            flashState();
        return flashEnabled == 1;
    }
 
// ******* flashSectorSize *****************************************************
// returns sector size of Flash memory, if available
/**
  * Returns the sector size of the Flash memory or 0, if no flash memory is installed.
  * If required, the sector size is determined form the device first.
  * @return the sector size of the Flash memory.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not supported by the firmware.
  */
    public int flashSectorSize () throws UsbException, InvalidFirmwareException, CapabilityException {
        if ( flashSectorSize < 0 ) // init variable
            flashState();
        return flashSectorSize;
    }
 
// ******* flashSectors ********************************************************
// returns number of sectors of Flash memory, if available
/**
  * Returns the number of sectors of the Flash memory or 0, if no Flash memory is installed.
  * If required, the number of sectors is determined form the device first.
  * @return the number of sectors of the Flash memory.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not supported by the firmware.
  */
    public int flashSectors () throws UsbException, InvalidFirmwareException, CapabilityException {
        if ( flashSectors < 0 ) // init variable
            flashState();
        return flashSectors;
    }
 
// ******* flashSize ***********************************************************
// returns size of Flash memory, if available
/**
  * Returns the size of Flash memory or 0, if no Flash memory is installed.
  * If required, the Flash size is determined form the device first.
  * @return the size of Flash memory.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not supported by the firmware.
  */
    public long flashSize () throws UsbException, InvalidFirmwareException, CapabilityException {
        return flashSectorSize() * (long)flashSectors();
    }
 
// ******* printMmcState *******************************************************
// returns true if Flash is available
/**
  * Prints out some debug information about *SD/MMC Flash cards in SPI mode.<br>
  * <b>Only use this method if such kind of Flash is installed.</b>
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not supported by the firmware.
  */
    public boolean printMmcState ( ) throws UsbException, InvalidFirmwareException, CapabilityException {
        byte[] buf = new byte[23];
        checkCapability(0,2);
        vendorRequest2(0x43, "MMC State", 0, 0, buf, 23);
        System.out.println("status=" + Integer.toBinaryString(256+(buf[0] & 255)).substring(1) + "." + Integer.toBinaryString(256+(buf[1] & 255)).substring(1) +
                "   lastCmd=" + buf[3] +
                "   lastCmdResponse=" + Integer.toBinaryString(256+(buf[4] & 255)).substring(1) +
                "   ec=" + buf[2] +
                "   BUSY=" + buf[22] +
                "   SDHC=" + buf[5] +
                "   buf=" + (buf[6] & 255)+" "+(buf[7] & 255)+" "+(buf[8] & 255)+" "+(buf[9] & 255)+" "+(buf[10] & 255)+" "+(buf[11] & 255)+"  "+(buf[12] & 255)); // +" "+(buf[13] & 255)+" "+(buf[14] & 255)+" "+(buf[15] & 255)+" "+(buf[16] & 255)+" "+(buf[17] & 255));
 
        return flashEnabled == 1;
    }
 
// ******* flashUploadBitstream ************************************************
/*
    Returns configuration time in ms.
    The format of the boot sector (sector 0 of the Flash memory) is
        0..7
        8..9    Number of sectors, or 0 is disabled
        10..11  Number of bytes in the last sector, i.e. th total size of Bitstream is ((bs[8] | (bs[9]<<8) - 1) * flash_sector_size + ((bs[10] | (bs[11]<<8))
*/
/**
  * Uploads a Bitstream to the Flash.
  * This allows the firmware to load the Bitstream from Flash. Together with installation of the firmware in EEPROM
  * it is possible to construct fully autonomous devices.
  * <p>
  * Information about the bitstream is stored in sector 0.
  * This so called boot sector has the following format:
  * <table bgcolor="#404040" cellspacing=1 cellpadding=4>
  *   <tr>
  *     <td bgcolor="#d0d0d0" valign="bottom"><b>Bytes</b></td>
  *     <td bgcolor="#d0d0d0" valign="bottom"><b>Description</b></td>
  *   </tr>
  *   <tr>
  *     <td bgcolor="#ffffff" valign="top">0..7</td>
  *     <td bgcolor="#ffffff" valign="top">ID, must be "ZTEXBS",1,1</td>
  *   </tr>
  *   <tr>
  *     <td bgcolor="#ffffff" valign="top">8..9</td>
  *     <td bgcolor="#ffffff" valign="top">The number of sectors used to store the Bitstream. 0 means no Bitstream.</td>
  *   </tr>
  *   <tr>
  *     <td bgcolor="#ffffff" valign="top">10..11</td>
  *     <td bgcolor="#ffffff" valign="top">The number of bytes in the last sector.</td>
  *   </tr>
  *   <tr>
  *     <td bgcolor="#ffffff" valign="top">12..sectorSize-1</td>
  *     <td bgcolor="#ffffff" valign="top">This data is reserved for future use and preserved by this method.</td>
  *   </tr>
  * </table>
  * <p>
  * The total size of the Bitstream is computed as ((bs[8] | (bs[9]<<8) - 1) * flash_sector_size + ((bs[10] | (bs[11]<<8))
  * where bs[i] denotes byte i of the boot sector.
  * <p>
  * The first sector of the Bitstream is sector 1.
  * @param fwFileName The file name of the Bitstream. The file can be a regular file or a system resource (e.g. a file from the current jar archive).
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not possible.
  * @throws BitstreamReadException if an error occurred while attempting to read the Bitstream.
  */
    public long flashUploadBitstream ( String fwFileName ) throws BitstreamReadException, UsbException, InvalidFirmwareException, CapabilityException {
        checkCapability(0,1);
        checkCapability(0,2);
        if ( ! flashEnabled() )
            throw new CapabilityException(this, "No Flash memory installed or");
        getFpgaState();
 
// read the Bitstream file      
        byte[][] buffer = new byte[2048][];
        int i,j;
        try {
            InputStream inputStream = JInputStream.getInputStream( fwFileName );
            j = flashSectorSize;
            for ( i=0; i<buffer.length && j==flashSectorSize; i++ ) {
                buffer[i] = new byte[flashSectorSize];
                j = inputStream.read( buffer[i] );
                if ( fpgaFlashBitSwap ) {
                    for (int k=0; k<flashSectorSize; k++ ) {
                        byte b = buffer[i][k];
                        buffer[i][k] = (byte) ( ((b & 128) >> 7) |
                                                ((b &  64) >> 5) |
                                                ((b &  32) >> 3) |
                                                ((b &  16) >> 1) |
                                                ((b &   8) << 1) |
                                                ((b &   4) << 3) |
                                                ((b &   2) << 5) |
                                                ((b &   1) << 7));
                    }
                }
                if ( j < 0 )
                    j = 0;
            }
 
            try {
                inputStream.close();
            }
            catch ( Exception e ) {
                System.err.println( "Warning: Error closing file " + fwFileName + ": " + e.getLocalizedMessage() );
            }
        }
        catch (IOException e) {
            throw new BitstreamReadException(e.getLocalizedMessage());
        }
 
// upload the Bitstream file    
        byte[] sector = new byte[flashSectorSize];
        byte[] ID = new String("ZTEXBS").getBytes();
 
        flashReadSector(0,sector);                       // read the boot sector (only the first 16 bytes are overwritten)
        for (int k=0; k<6; k++)
            sector[k]=ID[k];
        sector[6] = 1;
        sector[7] = 1;
        sector[8] = (byte) (i & 255);
        sector[9] = (byte) ((i>>8) & 255);
        sector[10] = (byte) (j & 255);
        sector[11] = (byte) ((j>>8) & 255);
        long t0 = new Date().getTime();
        flashWriteSector(0,sector);                      // write the boot sector
        for (int k=0; k<i; k++)
            flashWriteSector(k+1,buffer[k]);            // write the Bitstream sectors
 
        return new Date().getTime() - t0;
    }
 
// ******* flashResetBitstream *************************************************
// Clears a Bitstream from the Flash.
/**
  * Clears a Bitstream from the Flash.
  * This is achieved by writing 0 to bytes 8..9 of the boot sector, see {@link #flashUploadBitstream(String)}.
  * If no boot sector is installed the method returns without any write action.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not possible.
  */
    public void flashResetBitstream ( ) throws UsbException, InvalidFirmwareException, CapabilityException {
        checkCapability(0,2);
        if ( ! flashEnabled() )
            throw new CapabilityException(this, "No Flash memory installed or");
        byte[] sector = new byte[flashSectorSize];
        byte[] ID = new String("ZTEXBS").getBytes();
 
        flashReadSector(0,sector);                       // read the boot sector
        for (int k=0; k<6; k++)
            if ( sector[k] != ID[k] )
                return;
        if (sector[6]!=1 || sector[7]!=1 )
            return;
        sector[8] = 0;
        sector[9] = 0;
        flashWriteSector(0,sector);                      // write the boot sector
    }
 
// ******* flashFirstFreeSector ************************************************
// Returns the first free sector of the Flash memory, i.e. the first sector behind the Bitstream
/**
  * Returns the first free sector of the Flash memory.
  * This is the first sector behind the Bitstream, or 0 if no boot sector is installed (or 1 if a boot sector but no Bitstream is installed).
  * @return the first free sector of the Flash memory.
  * @throws InvalidFirmwareException if interface 1 is not supported.
  * @throws UsbException if a communication error occurs.
  * @throws CapabilityException if Flash memory access is not possible.
  */
    public int flashFirstFreeSector ( ) throws UsbException, InvalidFirmwareException, CapabilityException {
        checkCapability(0,2);
        if ( ! flashEnabled() )
            throw new CapabilityException(this, "No Flash memory installed or");
 
        byte[] sector = new byte[flashSectorSize];
        byte[] ID = new String("ZTEXBS").getBytes();
 
        flashReadSector(0,sector);                       // read the boot sector
        for (int k=0; k<6; k++)
            if ( sector[k] != ID[k] )
                return 0;
        if (sector[6]!=1 || sector[7]!=1 )
            return 0;
        return (sector[8] & 255) + ((sector[9] & 255) << 8) + 1;
    }
 
// ******* toString ************************************************************
/**
  * Returns a lot of useful information about the corresponding device.
  * @return a lot of useful information about the corresponding device.
  */
    public String toString () {
        String str = dev().toString();
        try {
            str += "\n   " + getFpgaConfigurationStr();
        }
        catch ( Exception e ) {
        }
        return str;
    }
 
// ******* capabilityInfo ******************************************************
/**
  * Creates a String with capability information.
  * @param pf A separator between the single capabilities, e.g. ", "
  * @return a string of the supported capabilities.
  */
    public String capabilityInfo ( String pf ) {
        String str = "";
        for ( int i=0; i<6; i++ )
            for (int j=0; j<8; j++ )
                if ( dev().interfaceCapabilities(i,j) ) {
                    if ( ! str.equals("") )
                        str+=pf;
                    if (i*8+j < capabilityStrings.length)
                        str+=capabilityStrings[i*8+j];
                    else
                        str+=i+"."+j;
                }
        return str;
    }
}
 
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