Subversion Repositories usb_fpga_1_2

/*!

   ucecho -- example for ZTEX USB FPGA Module 1.2

   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/.

!*/

import java.io.*;

import java.util.*;

import ch.ntb.usb.*;

import ztex.*;

// *****************************************************************************

// ******* ParameterException **************************************************

// *****************************************************************************

// Exception the prints a help message

class ParameterException extends Exception {

    public final static String helpMsg = new String (

                "Parameters:\n"+

                "    -d <number>       Device Number (default: 0)\n" +

                "    -f                Force uploads\n" +

                "    -p                Print bus info\n" +

                "    -w                Enable certain workarounds which may be required for vmware + windows\n"+

                "    -h                This help" );

    public ParameterException (String msg) {

        super( msg + "\n" + helpMsg );

    }

}

// *****************************************************************************

// ******* Test0 ***************************************************************

// *****************************************************************************

class UCEcho extends Ztex1v1 {

// ******* UCEcho **************************************************************

// constructor

    public UCEcho ( ZtexDevice1 pDev ) throws UsbException, ZtexDescriptorException {

        super ( pDev );

    }

// ******* claimInterface ******************************************************

// claims interface 0

    public void claimInterface ( ) throws UsbException{

        if ( LibusbJava.usb_set_configuration(handle(), 1) < 0 )

            throw new UsbException("Setting configuration to 1 failed: " + LibusbJava.usb_strerror());

        if ( LibusbJava.usb_claim_interface(handle(), 0) < 0 )

            throw new UsbException("Claiming interface 0 failed: " + LibusbJava.usb_strerror());

    }

// ******* releaseInterface ****************************************************

// releases interface 0

    public void releaseInterface ( ) {

        LibusbJava.usb_release_interface(handle(), 0);

    }

// ******* echo ****************************************************************

// writes a string to Endpoint 4, reads it back from Endpoint 2 and writes the output to System.out

    public void echo ( String input ) throws UsbException {

        byte buf[] = input.getBytes();

        int i = LibusbJava.usb_bulk_write(handle, 0x04, buf, buf.length, 1000);

        if ( i<0 )

            throw new UsbException("Error sending data: " + LibusbJava.usb_strerror());

        System.out.println("Send "+i+" bytes: `"+input+"'" );

        try {

            Thread.sleep( 10 );

        }

            catch ( InterruptedException e ) {

        }

        buf = new byte[1024];

        i = LibusbJava.usb_bulk_read(handle, 0x82, buf, 1024, 1000);

        if ( i<0 )

            throw new UsbException("Error receiving data: " + LibusbJava.usb_strerror());

        System.out.println("Read "+i+" bytes: `"+new String(buf,0,i)+"'" );

    }

// ******* main ****************************************************************

    public static void main (String args[]) {

        int devNum = 0;

        boolean force = false;

        boolean workarounds = false;

        try {

// init USB stuff

            LibusbJava.usb_init();

// scan the USB bus

            ZtexScanBus1 bus = new ZtexScanBus1( ZtexDevice1.cypressVendorId, ZtexDevice1.cypressProductId, true, false, 1);

            if ( bus.numberOfDevices() <= 0) {

                System.err.println("No devices found");

                System.exit(0);

            }

// scan the command line arguments

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

                if ( args[i].equals("-d") ) {

                    i++;

                    try {

                        if (i>=args.length) throw new Exception();

                        devNum = Integer.parseInt( args[i] );

                    }

                    catch (Exception e) {

                        throw new ParameterException("Device number expected after -d");

                    }

                }

                else if ( args[i].equals("-f") ) {

                    force = true;

                }

                else if ( args[i].equals("-p") ) {

                    bus.printBus(System.out);

                    System.exit(0);

                }

                else if ( args[i].equals("-p") ) {

                    bus.printBus(System.out);

                    System.exit(0);

                }

                else if ( args[i].equals("-w") ) {

                    workarounds = true;

                }

                else if ( args[i].equals("-h") ) {

                        System.err.println(ParameterException.helpMsg);

                        System.exit(0);

                }

                else throw new ParameterException("Invalid Parameter: "+args[i]);

            }

// create the main class            

            UCEcho ztex = new UCEcho ( bus.device(devNum) );

            ztex.certainWorkarounds = workarounds;

// upload the firmware if necessary

            if ( force || ! ztex.valid() || ! ztex.dev().productString().equals("ucecho for EZ-USB devices")  ) {

                System.out.println("Firmware upload time: " + ztex.uploadFirmware( "ucecho.ihx", force ) + " ms");

            }

// claim interface 0

            ztex.claimInterface();

// read string from stdin and write it to USB device

            String str = "";

            BufferedReader reader = new BufferedReader( new InputStreamReader( System.in ) );

            while ( ! str.equals("quit") ) {

                System.out.print("Enter a string or `quit' to exit the program: ");

                str = reader.readLine();

                if ( ! str.equals("") )

                    ztex.echo(str);

                System.out.println("");

            }

// release interface 0

            ztex.releaseInterface();

        }

        catch (Exception e) {

            System.out.println("Error: "+e.getLocalizedMessage() );

        }

   }

}