53 lines
2.1 KiB
C#
53 lines
2.1 KiB
C#
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using InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Accessors;
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using static InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Constants;
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using static InnovEnergy.Lib.Protocols.Modbus.Protocol.FunctionCode;
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namespace InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Replies;
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using UInt16s = IReadOnlyList<UInt16>;
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internal class ReadWriteRegistersResponseFrame : ModbusFrame
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{
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internal new const Int32 MinSize = 3;
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public MbByte ByteCount => Data.ByteAt(2);
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public MbWords RegistersRead => Data.WordsAt(3);
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public ReadWriteRegistersResponseFrame(Byte slave, UInt16s registersRead) : base(ExpectedSize(registersRead.Count))
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{
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if (registersRead.Count > MaxRegs)
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throw new ArgumentOutOfRangeException($"Maximum number of registers ({MaxRegs}) exceeeded!", nameof(registersRead));
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SlaveAddress .Set(slave);
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FunctionCode .Set(ReadWriteMultipleRegisters);
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ByteCount .Set(2 * registersRead.Count);
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RegistersRead.Set(registersRead);
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}
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internal static Int32 ExpectedSize(Int32 nRegisters) => MinSize + nRegisters * 2;
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private ReadWriteRegistersResponseFrame(Byte[] data) : this (new ArraySegment<Byte>(data))
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{ }
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private ReadWriteRegistersResponseFrame(ArraySegment<Byte> data) : base(data)
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{
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if (data.Count < MinSize)
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throw new ArgumentException($"Expecting an array of size {MinSize} or more", nameof(data));
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AssertFunctionCode(ReadWriteMultipleRegisters);
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var expectedSize = ByteCount + MinSize;
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if (data.Count != expectedSize)
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throw new ArgumentException($"Expecting an array of size {expectedSize}", nameof(data));
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if (ByteCount != RegistersRead.Count * 2)
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throw new ArgumentException(nameof(RegistersRead));
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}
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public static ReadWriteRegistersResponseFrame Parse(Byte[] data) => new ReadWriteRegistersResponseFrame(data);
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public static ReadWriteRegistersResponseFrame Parse(ArraySegment<Byte> data) => new ReadWriteRegistersResponseFrame(data);
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public static ReadWriteRegistersResponseFrame Parse(ModbusFrame frame) => new ReadWriteRegistersResponseFrame(frame.Data);
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}
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