Subversion Repositories usb_fpga_1_2

/*!

   Java Driver API for the ZTEX Firmware Kit

   Copyright (C) 2008-2009 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/.

!*/

package ztex;

import java.io.*;

import java.util.*;

import ch.ntb.usb.*;

/**

  * Provides methods for uploading firmware to Cypress EZ-USB devices.

  */

public class EzUsb {

// ******* reset **************************************************************

/**

  * Controls the reset state of a Cypress EZ-USB device.

  * @param handle The handle of the device.

  * @param r The reset state (true means reset).

  * @throws FirmwareUploadException if an error occurred while attempting to control the reset state.

  */

    public static void reset ( int handle, boolean r ) throws FirmwareUploadException {

        byte buffer[] = { (byte) (r ? 1 : 0) };

        int k = LibusbJava.usb_control_msg(handle, 0x40, 0xA0, 0xE600, 0, buffer, 1, 1000);   // upload j bytes

        if ( k<0 )

            throw new FirmwareUploadException( LibusbJava.usb_strerror() + ": unable to set reset="+buffer[0] );

        else if ( k!=1 )

            throw new FirmwareUploadException( "Unable to set reset="+buffer[0] );

        try {

            Thread.sleep( r ? 50 : 400 );       // give the firmware some time for initialization

        }

            catch ( InterruptedException e ) {

        }

    }

// ******* uploadFirmware ******************************************************

/**

  * Uploads the Firmware to a Cypress EZ-USB device.

  * @param handle The handle of the device.

  * @param ihxFile The firmware image.

  * @return The upload time in ms.

  * @throws FirmwareUploadException if an error occurred while attempting to upload the firmware.

  */

    public static long uploadFirmware (int handle, IhxFile ihxFile ) throws FirmwareUploadException {

        final int transactionBytes = 256;

        byte[] buffer = new byte[transactionBytes];

        reset( handle, true );  // reset = 1

        long t0 = new Date().getTime();

        int j = 0;

        for ( int i=0; i<=ihxFile.ihxData.length; i++ ) {

            if ( i >= ihxFile.ihxData.length || ihxFile.ihxData[i] < 0 || j >=transactionBytes ) {

                if ( j > 0 ) {

                    int k = LibusbJava.usb_control_msg(handle, 0x40, 0xA0, i-j, 0, buffer, j, 1000);   // upload j bytes

                    if ( k<0 )

                        throw new FirmwareUploadException(LibusbJava.usb_strerror());

                    else if ( k!=j )

                        throw new FirmwareUploadException();

                    try {

                        Thread.sleep( 1 );      // to avoid package loss

                    }

                        catch ( InterruptedException e ) {

                    }

                }

                j = 0;

            }

            if ( i < ihxFile.ihxData.length && ihxFile.ihxData[i] >= 0 && ihxFile.ihxData[i] <= 255 ) {

                buffer[j] = (byte) ihxFile.ihxData[i];

                j+=1;

            }

        }

        long t1 = new Date().getTime();

        try {

            EzUsb.reset(handle,false);          // error (may caused re-numeration) can be ignored

        }

        catch ( FirmwareUploadException e ) {

        }

        return t1 - t0;

    }

}