Subversion Repositories adv_debug_sys

////////////////////////////////////////////////////////////////

//

// ReadRegisterTransaction.java

//

// Copyright (C) 2010 Nathan Yawn 

//                    (nyawn@opencores.org)

//

// This class defines a transaction object which is passed to

// the RSP coder in order to perform an RSP 'read' command.

//

////////////////////////////////////////////////////////////////

//

// This source file may be used and distributed without

// restriction provided that this copyright statement is not

// removed from the file and that any derivative work contains

// the original copyright notice and the associated disclaimer.

// 

// This source file is free software; you can redistribute it

// and/or modify it under the terms of the GNU General

// Public License as published by the Free Software Foundation;

// either version 3.0 of the License, or (at your option) any

// later version.

//

// This source 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 Lesser General Public License for more

// details.

// 

// You should have received a copy of the GNU General

// Public License along with this source; if not, download it 

// from http://www.gnu.org/licenses/gpl.html

//

////////////////////////////////////////////////////////////////

package advancedWatchpointControl;

public class ReadRegisterTransaction implements TargetTransaction {

        private String packetString = null;

        private long dataValueRead = 0;

        public ReadRegisterTransaction(targetDebugRegisterSet.regType reg) {

                packetString = new String("p"); // 'p' is read one register

                int regAddr = targetDebugRegisterSet.getRegisterAddress(reg);

                packetString += Integer.toHexString(regAddr);

        }

        @Override

        public String getDataToSend() {

                return packetString;

        }

        @Override

        public boolean receivePacket(String pkt) {

                // A register read response has no leading header / char...

                // so just parse the number.

                long val;

                try {

                        val = Long.parseLong(pkt, 16);  // data comes back as a hex string

                } catch (Exception e) {

                        // TODO logMessageGUI("Got invalid read data (size " + pkt.length() + "): " + pkt + ": " + e);

                        dataValueRead = 0;

                        return false;

                }

                dataValueRead = val;

                return true;

        }

        public long getDataValueRead() {

                return dataValueRead;

        }

}