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| 1 | +/* |
| 2 | + * Copyright 2023 Matt Jamesson <scifidryer@gmail.com>. |
| 3 | + * |
| 4 | + * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | + * you may not use this file except in compliance with the License. |
| 6 | + * You may obtain a copy of the License at |
| 7 | + * |
| 8 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | + * |
| 10 | + * Unless required by applicable law or agreed to in writing, software |
| 11 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | + * See the License for the specific language governing permissions and |
| 14 | + * limitations under the License. |
| 15 | + */ |
| 16 | +package modbusmechanic; |
| 17 | + |
| 18 | +import com.intelligt.modbus.jlibmodbus.master.ModbusMaster; |
| 19 | +import com.intelligt.modbus.jlibmodbus.master.ModbusMasterTCP; |
| 20 | +import com.intelligt.modbus.jlibmodbus.msg.base.AbstractDataRequest; |
| 21 | +import com.intelligt.modbus.jlibmodbus.msg.base.AbstractMultipleRequest; |
| 22 | +import com.intelligt.modbus.jlibmodbus.msg.base.AbstractWriteMultipleRequest; |
| 23 | +import com.intelligt.modbus.jlibmodbus.msg.base.ModbusResponse; |
| 24 | +import com.intelligt.modbus.jlibmodbus.msg.request.ReadCoilsRequest; |
| 25 | +import com.intelligt.modbus.jlibmodbus.msg.request.ReadDiscreteInputsRequest; |
| 26 | +import com.intelligt.modbus.jlibmodbus.msg.request.ReadHoldingRegistersRequest; |
| 27 | +import com.intelligt.modbus.jlibmodbus.msg.request.ReadInputRegistersRequest; |
| 28 | +import com.intelligt.modbus.jlibmodbus.msg.request.WriteMultipleCoilsRequest; |
| 29 | +import com.intelligt.modbus.jlibmodbus.msg.request.WriteMultipleRegistersRequest; |
| 30 | +import com.intelligt.modbus.jlibmodbus.msg.request.WriteSingleRegisterRequest; |
| 31 | +import com.intelligt.modbus.jlibmodbus.exception.ModbusIOException; |
| 32 | +import java.nio.ByteBuffer; |
| 33 | + |
| 34 | +/** |
| 35 | + * |
| 36 | + * @author Matt Jamesson <scifidryer@gmail.com> |
| 37 | + */ |
| 38 | +public abstract class AbstractModbusMaster { |
| 39 | + protected ModbusMaster master; |
| 40 | + public void setResponseTimeout(int timeout) |
| 41 | + { |
| 42 | + master.setResponseTimeout(timeout); |
| 43 | + } |
| 44 | + public ModbusResponse generateModbusMessage(int protocolId, int transactionId, int slaveNode, int functionCode, int register, int quantity, byte[] values) throws Exception |
| 45 | + { |
| 46 | + ModbusResponse response = null; |
| 47 | + if (!master.isConnected()) |
| 48 | + { |
| 49 | + master.connect(); |
| 50 | + } |
| 51 | + AbstractDataRequest request = null; |
| 52 | + if (functionCode == 1) |
| 53 | + { |
| 54 | + request = new ReadCoilsRequest(); |
| 55 | + } |
| 56 | + if (functionCode == 2) |
| 57 | + { |
| 58 | + request = new ReadDiscreteInputsRequest(); |
| 59 | + } |
| 60 | + if (functionCode == 3) |
| 61 | + { |
| 62 | + request = new ReadHoldingRegistersRequest(); |
| 63 | + } |
| 64 | + else if (functionCode == 4) |
| 65 | + { |
| 66 | + request = new ReadInputRegistersRequest(); |
| 67 | + } |
| 68 | + else if (functionCode == 6) |
| 69 | + { |
| 70 | + request = new WriteSingleRegisterRequest(); |
| 71 | + } |
| 72 | + else if (functionCode == 15) |
| 73 | + { |
| 74 | + request = new WriteMultipleCoilsRequest(); |
| 75 | + } |
| 76 | + else if (functionCode == 16) |
| 77 | + { |
| 78 | + request = new WriteMultipleRegistersRequest(); |
| 79 | + } |
| 80 | + request.setServerAddress(slaveNode); |
| 81 | + request.setStartAddress(register); |
| 82 | + if (request instanceof AbstractMultipleRequest) |
| 83 | + { |
| 84 | + ((AbstractMultipleRequest)(request)).setQuantity(quantity); |
| 85 | + } |
| 86 | + if (request instanceof AbstractWriteMultipleRequest) |
| 87 | + { |
| 88 | + ((AbstractWriteMultipleRequest)(request)).setBytes(values); |
| 89 | + } |
| 90 | + if (request instanceof WriteSingleRegisterRequest) |
| 91 | + { |
| 92 | + //cast the two bytes here to a short, because the only accepted input is a short |
| 93 | + ByteBuffer bb = ByteBuffer.allocate(2); |
| 94 | + bb.put(values[0]); |
| 95 | + bb.put(values[1]); |
| 96 | + ((WriteSingleRegisterRequest)(request)).setValue(bb.getShort(0)); |
| 97 | + } |
| 98 | + if (master instanceof ModbusMasterTCP) |
| 99 | + { |
| 100 | + master.setTransactionId(transactionId); |
| 101 | + request.setProtocolId(protocolId); |
| 102 | + } |
| 103 | + response = master.processRequest(request); |
| 104 | + return response; |
| 105 | + } |
| 106 | + public void disconnect() throws ModbusIOException |
| 107 | + { |
| 108 | + master.disconnect(); |
| 109 | + } |
| 110 | +} |
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