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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.velbus.internal.handler;
  14
  15 import static org.openhab.binding.velbus.internal.VelbusBindingConstants.*;
  16
  17 import java.util.Arrays;
  18 import java.util.HashSet;
  19 import java.util.Set;
  20
  21 import org.eclipse.jdt.annotation.NonNullByDefault;
  22 import org.openhab.binding.velbus.internal.packets.VelbusPacket;
  23 import org.openhab.core.library.types.OnOffType;
  24 import org.openhab.core.thing.ChannelUID;
  25 import org.openhab.core.thing.Thing;
  26 import org.openhab.core.thing.ThingStatus;
  27 import org.openhab.core.thing.ThingStatusDetail;
  28 import org.openhab.core.thing.ThingTypeUID;
  29 import org.openhab.core.types.Command;
  30 import org.openhab.core.types.RefreshType;
  31
  32 /**
  33  * The {@link VelbusVMBGPOHandler} is responsible for handling commands, which are
  34  * sent to one of the channels.
  35  *
  36  * @author Cedric Boon - Initial contribution
  37  */
  38 @NonNullByDefault
  39 public class VelbusVMBGPOHandler extends VelbusMemoHandler {
  40     public static final Set<ThingTypeUID> SUPPORTED_THING_TYPES = new HashSet<>(
  41             Arrays.asList(THING_TYPE_VMBGPO, THING_TYPE_VMBGPOD, THING_TYPE_VMBGPOD_2));
  42
  43     public static final int MODULESETTINGS_MEMORY_ADDRESS = 0x02F0;
  44     public static final int LAST_MEMORY_LOCATION_ADDRESS = 0x1A03;
  45
  46     private final ChannelUID screensaverChannel = new ChannelUID(thing.getUID(), "oledDisplay", "SCREENSAVER");
  47
  48     private byte moduleSettings;
  49
  50     public VelbusVMBGPOHandler(Thing thing) {
  51         super(thing);
  52     }
  53
  54     @Override
  55     public void handleCommand(ChannelUID channelUID, Command command) {
  56         super.handleCommand(channelUID, command);
  57
  58         VelbusBridgeHandler velbusBridgeHandler = getVelbusBridgeHandler();
  59         if (velbusBridgeHandler == null) {
  60             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.BRIDGE_OFFLINE);
  61             return;
  62         }
  63
  64         if (channelUID.equals(screensaverChannel) && command instanceof RefreshType) {
  65             sendReadMemoryPacket(velbusBridgeHandler, MODULESETTINGS_MEMORY_ADDRESS);
  66         }
  67
  68         if (channelUID.equals(screensaverChannel) && command instanceof OnOffType) {
  69             byte screenSaverOnOffByte = (byte) ((command == OnOffType.ON) ? 0x80 : 0x00);
  70             moduleSettings = (byte) (screenSaverOnOffByte | (moduleSettings & 0x7F));
  71             sendWriteMemoryPacket(velbusBridgeHandler, MODULESETTINGS_MEMORY_ADDRESS, moduleSettings);
  72             sendWriteMemoryPacket(velbusBridgeHandler, LAST_MEMORY_LOCATION_ADDRESS, (byte) 0xFF);
  73         }
  74     }
  75
  76     @Override
  77     public void onPacketReceived(byte[] packet) {
  78         super.onPacketReceived(packet);
  79
  80         logger.trace("onPacketReceived() was called");
  81
  82         if (packet[0] == VelbusPacket.STX && packet.length >= 5) {
  83             byte command = packet[4];
  84
  85             if ((command == COMMAND_MEMORY_DATA_BLOCK && packet.length >= 11)
  86                     || (command == COMMAND_MEMORY_DATA && packet.length >= 8)) {
  87                 byte highMemoryAddress = packet[5];
  88                 byte lowMemoryAddress = packet[6];
  89                 int memoryAddress = ((highMemoryAddress & 0xff) << 8) | (lowMemoryAddress & 0xff);
  90                 byte[] data = (command == COMMAND_MEMORY_DATA_BLOCK)
  91                         ? new byte[] { packet[7], packet[8], packet[9], packet[10] }
  92                         : new byte[] { packet[7] };
  93
  94                 for (int i = 0; i < data.length; i++) {
  95
  96                     if ((memoryAddress + i) == MODULESETTINGS_MEMORY_ADDRESS) {
  97                         this.moduleSettings = data[i];
  98                         OnOffType state = OnOffType.from((this.moduleSettings & 0x80) != 0x00);
  99                         updateState(screensaverChannel, state);
 100                     }
 101                 }
 102             }
 103         }
 104     }
 105 }