URL https://opencores.org/ocsvn/usb_fpga_2_13/usb_fpga_2_13/trunk
Subversion Repositories usb_fpga_2_13

[/] [usb_fpga_2_13/] [trunk/] [java/] [ztex/] [Ztex1.java] - Blame information for rev 2

Details | Compare with Previous | View Log

/*!
   Java host software API of ZTEX SDK
   Copyright (C) 2009-2014 ZTEX GmbH.
   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
*/
package ztex;
 
import java.io.*;
import java.util.*;
 
import ch.ntb.usb.*;
 
/**
  * This class implements the interface-independent part of the communication protocol for the interaction with the ZTEX firmware.<p>
  * All firmware implementations that provide the ZTEX descriptor 1 are supported.
  * A description of this descriptor can be found in {@link ZtexDevice1}.
  * <p>
  * The most important features of this class are the functions for uploading the firmware
  * and the renumeration management.
  * <p>
  * The interface dependent part of the communication protocol (currently only one is supported)
  * can be found in {@link Ztex1v1}.
  * @see ZtexDevice1
  * @see Ztex1v1
  */
public class Ztex1 {
    private final int maxDevNum = 1023;
    private long handle;
    private ZtexDevice1 dev = null;
    private boolean oldDevices[] = new boolean[maxDevNum+1];
    private int oldDevNum = -1;
    private String usbBusName = null;
    private boolean[] interfaceClaimed = new boolean[256];
    private boolean configurationSet = false;
/** * Setting to true enables certain workarounds, e.g. to deal with bad driver/OS implementations. */
    public boolean certainWorkarounds = false;
/** * The timeout for  control messages in ms. */
    public int controlMsgTimeout = 1000;        // in ms
    private long lastVendorCommandT = 0;
 
 
// ******* Ztex1 ***************************************************************
/**
  * Constructs an instance from a given device.
  * @param pDev The given device.
  * @throws UsbException if an communication error occurred.
  */
    public Ztex1 ( ZtexDevice1 pDev ) throws UsbException {
        dev = pDev;
        init();
    }
 
// ******* init ****************************************************************
/**
  * Initializates the class.
  * @throws UsbException if an communication error occurred.
  */
    protected void init () throws UsbException {
        for (int i=0; i<256; i++)
            interfaceClaimed[i] = false;
 
        handle = LibusbJava.usb_open(dev.dev());
//      if ( handle<=0 ) 
//          throw new UsbException(dev.dev(), "Error opening device");
    }
 
// ******* finalize ************************************************************
/** * The destructor closes the USB file handle. */
    protected void finalize () {
        for (int i=0; i<256; i++)
            if ( interfaceClaimed[i] )
                LibusbJava.usb_release_interface(handle, i);
 
        LibusbJava.usb_close(handle);
    }
 
// ******* handle **************************************************************
/** * Returns the USB file handle. */
    public final long handle()
    {
        return handle;
    }
 
// ******* dev *****************************************************************
/**
  * Returns the corresponding {@link ZtexDevice1}.
  * @return the corresponding {@link ZtexDevice1}.
  */
    public final ZtexDevice1 dev()
    {
        return dev;
    }
 
// ******* valid ***************************************************************
/**
  * Returns true if ZTEX descriptor 1 is available.
  * @return true if ZTEX descriptor 1 is available.
  */
    public boolean valid ( ) {
        return dev.valid();
    }
 
// ******* checkValid **********************************************************
/**
  * Checks whether ZTEX descriptor 1 is available.
  * @throws InvalidFirmwareException if ZTEX descriptor 1 is not available.
  */
    public void checkValid () throws InvalidFirmwareException {
        if ( ! dev.valid() )
            throw new InvalidFirmwareException(this, "Can't read ZTEX descriptor 1");
    }
 
// ******* vendorCommand *******************************************************
/**
  * Sends a vendor command to Endpoint 0 of the EZ-USB device.
  * The command may be send multiple times until the {@link #controlMsgTimeout} is reached.
  * @param cmd The command number (0..255).
  * @param func The name of the command. This string is used for the generation of error messages.
  * @param value The value (0..65535), i.e bytes 2 and 3 of the setup data.
  * @param index The index (0..65535), i.e. bytes 4 and 5 of the setup data.
  * @param length The size of the payload data (0..65535), i.e. bytes 6 and 7 of the setup data.
  * @param buf The payload data buffer.
  * @return the number of bytes sent.
  * @throws UsbException if a communication error occurs.
  */
    public synchronized int vendorCommand (int cmd, String func, int value, int index, byte[] buf, int length) throws UsbException {
        long t0 = new Date().getTime()-100;
        int trynum = 0;
        int i = -1;
        if ( controlMsgTimeout < 200 )
            controlMsgTimeout = 200;
//      while ( i<=0 && new Date().getTime()-t0<controlMsgTimeout ) {           // we repeat the message until the timeout has reached
            i = LibusbJava.usb_control_msg(handle, 0x40, cmd, value, index, buf, length, controlMsgTimeout);
            if ( certainWorkarounds ) {
                try {
                    Thread.sleep(2);
                }
                    catch ( InterruptedException e ) {
                }
            }
            lastVendorCommandT = new Date().getTime();
            if ( i < 0 ) {
                System.err.println("Warning (try " + (trynum+1) + "): " + LibusbJava.usb_strerror() );
                try {
                    Thread.sleep( 1 << trynum );                                // we don't want to bother the USB device to often
                }
                    catch ( InterruptedException e ) {
                }
                trynum++;
            }
//      } 
        if ( i < 0 )
            throw new UsbException( dev.dev(), (func != null ? func + ": " : "" )+ LibusbJava.usb_strerror());
        return i;
    }
 
/**
  * Sends a vendor command with no payload data to Endpoint 0 of the EZ-USB device.
  * The command may be send multiple times until the {@link #controlMsgTimeout} is reached.
  * @param cmd The command number (0..255).
  * @param func The name of the command. This string is used for the generation of error messages.
  * @param value The value (0..65535), i.e bytes 2 and 3 of the setup data.
  * @param index The index (0..65535), i.e. bytes 4 and 5 of the setup data.
  * @return the number of bytes sent.
  * @throws UsbException if a communication error occurs.
  */
    public int vendorCommand (int cmd, String func, int value, int index) throws UsbException {
        byte[] buf = { 0 };
        return vendorCommand (cmd, func, value, index, buf, 0);
    }
 
/**
  * Sends a vendor command with no payload data and no setup data to Endpoint 0 of the EZ-USB device.
  * The command may be send multiple times until the {@link #controlMsgTimeout} is reached.
  * @param cmd The command number (0..255).
  * @param func The name of the command. This string is used for the generation of error messages.
  * @return the number of bytes sent.
  * @throws UsbException if a communication error occurs.
  */
    public int vendorCommand (int cmd, String func) throws UsbException {
        byte[] buf = { 0 };
        return vendorCommand (cmd, func, 0, 0, buf, 0);
    }
 
// ******* vendorRequest *******************************************************
/**
  * Sends a vendor request to Endpoint 0 of the EZ-USB device.
  * The request may be send multiple times until the {@link #controlMsgTimeout} is reached.
  * @param cmd The request number (0..255).
  * @param func The name of the request. This string is used for the generation of error messages.
  * @param value The value (0..65535), i.e bytes 2 and 3 of the setup data.
  * @param index The index (0..65535), i.e. bytes 4 and 5 of the setup data.
  * @param maxlen The size of the requested payload data (0..65535), i.e. bytes 6 and 7 of the setup data.
  * @param buf The payload data buffer.
  * @return the number of bytes received.
  * @throws UsbException if a communication error occurs.
  */
    public synchronized int vendorRequest (int cmd, String func, int value, int index, byte[] buf, int maxlen) throws UsbException {
        long t0 = new Date().getTime()-100;
        int trynum = 0;
        int i = -1;
        if ( controlMsgTimeout < 200 )
            controlMsgTimeout = 200;
        while ( i<=0 && new Date().getTime()-t0<controlMsgTimeout ) {            // we repeat the message until the timeout has reached
            /*
                The HSNAK mechanism of EP0 usually avoids that a request is sent before a command has been completed.
                Unfortunately this mechanism is only 99.99% reliable. Therefore we wait at least 1ms after the last
                command has been send before we transmit a new request.
            */
            long ms = new Date().getTime() - lastVendorCommandT;
            if ( ms < 2 ) {     //
                try {
                    Thread.sleep(1);
                }
                    catch ( InterruptedException e ) {
                }
            }
 
            i = LibusbJava.usb_control_msg(handle, 0xc0, cmd, value, index, buf, maxlen, controlMsgTimeout);
            if ( certainWorkarounds ) {
                try {
                    Thread.sleep(2);
                }
                    catch ( InterruptedException e ) {
                }
            }
            if ( i < 0 ) {
                System.err.println("Warning (try " + (trynum+1) + "): " + LibusbJava.usb_strerror() );
                try {
                    Thread.sleep( 1 << trynum );                                // we don't want to bother the USB device to often
                }
                    catch ( InterruptedException e ) {
                }
                trynum++;
            }
        }
        if ( i < 0 )
            throw new UsbException( dev.dev(), (func != null ? func + ": " : "" ) + LibusbJava.usb_strerror());
        return i;
    }
 
/**
  * Sends a vendor request to Endpoint 0 of the EZ-USB device.
  * The request may be send multiple times until the {@link #controlMsgTimeout} is reached.
  * @param cmd The request number (0..255).
  * @param func The name of the request. This string is used for the generation of error messages.
  * @param maxlen The size of the requested payload data (0..65535), i.e. bytes 6 and 7 of the setup data.
  * @param buf The payload data buffer.
  * @return the number of bytes sent.
  * @throws UsbException if a communication error occurs.
  */
    public int vendorRequest (int cmd, String func, byte[] buf, int maxlen) throws UsbException {
        return vendorRequest (cmd, func, 0, 0, buf, maxlen);
    }
 
// ******* vendorCommand2 ******************************************************
/**
  * Sends a vendor command to Endpoint 0 of the EZ-USB device and throws an {@link UsbException} if not all of the payload has been sent.
  * The command may be send multiple times until the {@link #controlMsgTimeout} is reached.
  * @param cmd The command number (0..255).
  * @param func The name of the command. This string is used for the generation of error messages.
  * @param value The value (0..65535), i.e bytes 2 and 3 of the setup data.
  * @param index The index (0..65535), i.e. bytes 4 and 5 of the setup data.
  * @param length The size of the payload data (0..65535), i.e. bytes 6 and 7 of the setup data.
  * @param buf The payload data buffer.
  * @throws UsbException if a communication error occurs or if not all of the payload has been sent.
  */
    public synchronized void vendorCommand2 (int cmd, String func, int value, int index, byte[] buf, int length) throws UsbException {
        int i = vendorCommand (cmd, func, value, index, buf, length);
        if ( i != length )
            throw new UsbException( dev.dev(), (func != null ? func + ": " : "" ) + "Send " + i + " byte of data instead of " + length + " bytes");
    }
 
// ******* vendorRequest2 ******************************************************
/**
  * Sends a vendor request to Endpoint 0 of the EZ-USB device and throws an {@link UsbException} if not all of the payload has been received.
  * The request may be send multiple times until the {@link #controlMsgTimeout} is reached.
  * @param cmd The request number (0..255).
  * @param func The name of the request. This string is used for the generation of error messages.
  * @param value The value (0..65535), i.e bytes 2 and 3 of the setup data.
  * @param index The index (0..65535), i.e. bytes 4 and 5 of the setup data.
  * @param maxlen The size of the requested payload data (0..65535), i.e. bytes 6 and 7 of the setup data.
  * @param buf The payload data buffer.
  * @throws UsbException if a communication error occurs or not all of the payload has been received.
  */
    public void vendorRequest2 (int cmd, String func, int value, int index, byte[] buf, int maxlen) throws UsbException {
        int i = vendorRequest(cmd, func, value, index, buf, maxlen);
        if ( i != maxlen )
            throw new UsbException( dev.dev(), (func != null ? func + ": " : "" ) + "Received " + i + " byte of data, expected "+maxlen+" bytes");
    }
 
/**
  * Sends a vendor request to Endpoint 0 of the EZ-USB device and throws an {@link UsbException} if not all of the payload has been received.
  * The request may be send multiple times until the {@link #controlMsgTimeout} is reached.
  * @param cmd The request number (0..255).
  * @param func The name of the request. This string is used for the generation of error messages.
  * @param maxlen The size of the requested payload data (0..65535), i.e. bytes 6 and 7 of the setup data.
  * @param buf The payload data buffer.
  * @throws UsbException if a communication error occurs or not all of the payload has been received.
  */
    public void vendorRequest2 (int cmd, String func, byte[] buf, int maxlen) throws UsbException {
        vendorRequest2(cmd, func, 0, 0, buf, maxlen);
    }
 
 
 
// ******* setConfiguration ****************************************************
/**
  * Sets the configuration.
  * @param config The configuration number (usually 1)
  * @throws UsbException if an error occurs while attempting to set the configuration.
  */
    public void setConfiguration ( int config) throws UsbException{
        if ( LibusbJava.usb_set_configuration(handle(), config) < 0 )
            throw new UsbException("Setting configuration to " + config + " failed: " + LibusbJava.usb_strerror());
        configurationSet = true;
    }
 
 
// ******* trySetConfiguration ****************************************************
/**
  * Tries to set the configuration.
  * If an error occurs while attempting to set the configuration, a warning messaage is printed to stderr.
  * @param config The configuration number (usually 1)
  */
    public void trySetConfiguration ( int config) {
        if ( LibusbJava.usb_set_configuration(handle(), config) < 0 )
            System.err.println("Setting configuration to " + config + " failed: " + LibusbJava.usb_strerror());
        configurationSet = true;
    }
 
 
// ******* getInterfaceClaimed *************************************************
/**
  * Returns true if interface is claimed.
  * @return true if interface is claimed
  * @param iface The interface number
  */
    public boolean getInterfaceClaimed ( int iface ) {
        return iface>=0 && iface<256 && interfaceClaimed[iface];
    }
 
 
// ******* claimInterface ******************************************************
/**
  * Claims an interface.
  * @param iface The interface number (usually 0)
  * @throws UsbException if an error occurs while attempting to claim the interface.
  */
    public void claimInterface ( int iface) throws UsbException{
        if ( ! configurationSet )
            trySetConfiguration(1);
        if ( ( iface<0 || iface>=256 || (! interfaceClaimed[iface]) ) && ( LibusbJava.usb_claim_interface(handle(), iface) < 0 ) )
            throw new UsbException("Claiming interface " + iface + " failed: " + LibusbJava.usb_strerror());
        if ( iface>=0 && iface < 256 )
            interfaceClaimed[iface]=true;
    }
 
 
// ******* releaseInterface ****************************************************
/**
  * Releases an interface.
  * @param iface The interface number (usually 0)
  */
    public void releaseInterface ( int iface ) {
        if ( iface<0 || iface>=256 || interfaceClaimed[iface] )
            LibusbJava.usb_release_interface(handle(), iface);
        if ( iface>=0 && iface < 256 )
            interfaceClaimed[iface]=false;
 
    }
 
 
// ******* findOldDevices ******************************************************
    private synchronized void findOldDevices () throws DeviceLostException {
        usbBusName = dev.dev().getBus().getDirname();
 
        Usb_Bus bus = LibusbJava.usb_get_busses();
        while ( bus != null && ! bus.getDirname().equals(usbBusName) )
            bus = bus.getNext();
        if ( bus == null )
                throw new DeviceLostException( "findOldDevice: Bus dissapeared" );
 
        for ( int i=0; i<=maxDevNum; i++ )
            oldDevices[i] = false;
 
        Usb_Device d = bus.getDevices();
        while ( d != null ) {
            byte b = d.getDevnum();
            if ( b > maxDevNum )
                throw new DeviceLostException( "Device number too large: " + b + " > " + maxDevNum );
            if ( b > 0 )
                oldDevices[b] = true;
            d = d.getNext();
        }
        oldDevNum = dev.dev().getDevnum();
    }
 
// ******* findNewDevice *******************************************************
    private synchronized Usb_Device findNewDevice ( String errMsg ) throws DeviceLostException {
        Usb_Device newDev = null;
        LibusbJava.usb_find_busses();
        LibusbJava.usb_find_devices();
 
        Usb_Bus bus = LibusbJava.usb_get_busses();
        while ( bus != null && ! bus.getDirname().equals(usbBusName) )
            bus = bus.getNext();
        if ( bus == null )
                throw new DeviceLostException( "findNewDevice: Bus dissapeared" );
 
        Usb_Device d = bus != null ? bus.getDevices() : null;
        while ( d != null ) {
            byte b = d.getDevnum();
            if ( b > maxDevNum )
                throw new DeviceLostException( "Device number too large: " + b + " > " + maxDevNum );
            if ( b > 0 && ! oldDevices[b] ) {
                if ( newDev != null )
                    throw new DeviceLostException( errMsg + "More than 2 new devices found: " + newDev.getDevnum() + "(`" + newDev.getFilename() + "') and " + b + "(`" + d.getFilename() + "')");
                newDev = d;
            }
            d = d.getNext();
        }
 
        return newDev;
    }
 
// ******* initNewDevice *******************************************************
    private void initNewDevice ( String errBase, boolean scanUnconfigured ) throws DeviceLostException, UsbException, InvalidFirmwareException {
// scan the bus for up to 60 s for a new device. Boot sequence may take a while.
        Usb_Device newDev = null;
        int i;
        for ( i=0; i<300 && newDev==null; i++ ) {
            try {
                Thread.sleep( 200 );
            }
                catch ( InterruptedException e ) {
            }
            if ( i > 10 && oldDevNum >= 0 && oldDevNum < maxDevNum )
                oldDevices[oldDevNum ] = false;
            newDev = findNewDevice( errBase + ": " );
        }
        oldDevNum = -1;
        if ( newDev == null )
            throw new DeviceLostException( errBase + ": No new device found" );
 
// init new device
        Usb_Device_Descriptor dd = newDev.getDescriptor();
        int vid = dd.getIdVendor() & 65535;
        int pid = dd.getIdProduct() & 65535;
        try {
            dev = new ZtexDevice1( newDev, vid, pid, scanUnconfigured );
        }
        catch ( DeviceNotSupportedException e ) {
            throw new InvalidFirmwareException( e.getLocalizedMessage() );
        }
 
        init();
    }
 
// ******* uploadFirmware ******************************************************
/**
  * Uploads the firmware to the EZ-USB and manages the renumeration process.
  * <p>
  * Before the firmware is uploaded the device is set into a reset state.
  * After the upload the firmware is booted and the renumeration starts.
  * During this process the device disappears from the bus and a new one
  * occurs which will be assigned to this class automatically (instead of the disappeared one).
  * @param ihxFile The firmware image.
  * @param force The compatibility check is skipped if true.
  * @throws IncompatibleFirmwareException if the given firmware is not compatible to the installed one, see {@link ZtexDevice1#compatible(int,int,int,int)} (Upload can be enforced using the <tt>force</tt> parameter)
  * @throws FirmwareUploadException If an error occurred while attempting to upload the firmware.
  * @throws UsbException if a communication error occurs.
  * @throws InvalidFirmwareException if ZTEX descriptor 1 is not available.
  * @throws DeviceLostException if a device went lost after renumeration.
  * @return the upload time in ms.
  */
//  returns upload time in ms
    public long uploadFirmware ( ZtexIhxFile1 ihxFile, boolean force ) throws IncompatibleFirmwareException, FirmwareUploadException, UsbException, InvalidFirmwareException, DeviceLostException {
// load the ihx file
//      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()) );
        }
 
// scan the bus for comparison
        findOldDevices();
 
// upload the firmware
        long time = EzUsb.uploadFirmware( handle, ihxFile );
 
// find and init new device
        initNewDevice("Device lost after uploading Firmware", false);
 
        return time;
    }
 
/**
  * Uploads the firmware to the EZ-USB and manages the renumeration process.
  * <p>
  * Before the firmware is uploaded the device is set into a reset state.
  * After the upload the firmware is booted and the renumeration starts.
  * During this process the device disappears from the bus and a new one
  * occurs which will be assigned to this class automatically (instead of the disappeared one).
  * @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 The compatibility check is skipped if true.
  * @throws IncompatibleFirmwareException if the given firmware is not compatible to the installed one, see {@link ZtexDevice1#compatible(int,int,int,int)} (Upload can be enforced using the <tt>force</tt> parameter)
  * @throws FirmwareUploadException If an error occurred while attempting to upload the firmware.
  * @throws UsbException if a communication error occurs.
  * @throws InvalidFirmwareException if ZTEX descriptor 1 is not available.
  * @throws DeviceLostException if a device went lost after renumeration.
  * @return the upload time in ms.
  */
//  returns upload time in ms
    public long uploadFirmware ( String ihxFileName, boolean force ) throws IncompatibleFirmwareException, FirmwareUploadException, UsbException, InvalidFirmwareException, DeviceLostException {
// 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() );
        }
        return uploadFirmware( ihxFile, force );
    }
 
/**
  * Uploads the firmware to the EZ-USB and manages the renumeration process.
  * <p>
  * Before the firmware is uploaded the device is set into a reset state.
  * After the upload the firmware is booted and the renumeration starts.
  * During this process the device disappears from the bus and a new one
  * occurs which will be assigned to this class automatically (instead of the disappeared one).
  * @param ihxIn Input stream from which the ihx file is read.
  * @param name Name of the input.
  * @param force The compatibility check is skipped if true.
  * @throws IncompatibleFirmwareException if the given firmware is not compatible to the installed one, see {@link ZtexDevice1#compatible(int,int,int,int)} (Upload can be enforced using the <tt>force</tt> parameter)
  * @throws FirmwareUploadException If an error occurred while attempting to upload the firmware.
  * @throws UsbException if a communication error occurs.
  * @throws InvalidFirmwareException if ZTEX descriptor 1 is not available.
  * @throws DeviceLostException if a device went lost after renumeration.
  * @return the upload time in ms.
  */
//  returns upload time in ms
    public long uploadFirmware ( InputStream ihxIn, String name, boolean force ) throws IncompatibleFirmwareException, FirmwareUploadException, UsbException, InvalidFirmwareException, DeviceLostException {
// load the ihx file
        ZtexIhxFile1 ihxFile;
        try {
            ihxFile = new ZtexIhxFile1( ihxIn, name );
        }
        catch ( IOException e ) {
            throw new FirmwareUploadException( e.getLocalizedMessage() );
        }
        catch ( IhxFileDamagedException e ) {
            throw new FirmwareUploadException( e.getLocalizedMessage() );
        }
        return uploadFirmware( ihxFile, force );
    }
 
// ******* resetEzUsb **********************************************************
/**
  * Resets the EZ-USB and manages the renumeration process.
  * <p>
  * After the reset the renumeration starts.
  * During this process the device disappears from the bus and a new one
  * occurs which will be assigned to this class automatically (instead of the disappeared one).
  * @throws FirmwareUploadException If an error occurred while attempting to upload the firmware.
  * @throws UsbException if a communication error occurs.
  * @throws InvalidFirmwareException if ZTEX descriptor 1 is not available.
  * @throws DeviceLostException if a device went lost after renumeration.
  */
    public void resetEzUsb () throws FirmwareUploadException, UsbException, InvalidFirmwareException, DeviceLostException {
// scan the bus for comparison
        findOldDevices();
 
// reset the EZ-USB
        EzUsb.reset(handle,true);
        try {
            EzUsb.reset(handle,false);          // error (may caused by re-numeration) can be ignored
        }
        catch ( FirmwareUploadException e ) {
        }
 
// find and init new device
        initNewDevice( "Device lost after resetting the EZ-USB", true );
    }
 
// ******* toString ************************************************************
/**
  * Returns a lot of useful information about the corresponding device.
  * @return a lot of useful information about the corresponding device.
  */
    public String toString () {
        return dev.toString();
    }
 
}
Browse

Tools

Subversion Repositories usb_fpga_2_13

[/] [usb_fpga_2_13/] [trunk/] [java/] [ztex/] [Ztex1.java] - Blame information for rev 2
