49 lines
1.8 KiB
C#
49 lines
1.8 KiB
C#
using InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Accessors;
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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 ReadHoldingRegistersResponseFrame : 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 ReadHoldingRegistersResponseFrame(Byte slave, UInt16s registersRead) : base(ExpectedSize(registersRead.Count))
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{
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SlaveAddress .Set(slave);
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FunctionCode .Set(ReadHoldingRegisters);
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ByteCount .Set(registersRead.Count * 2);
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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 ReadHoldingRegistersResponseFrame(Byte[] data) : this(new ArraySegment<Byte>(data))
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{ }
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private ReadHoldingRegistersResponseFrame(ArraySegment<Byte> data) : base(data)
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{
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if (data.Count < MinSize)
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throw new ArgumentOutOfRangeException($"Expecting an array of size {MinSize} or more", nameof(data));
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AssertFunctionCode(ReadHoldingRegisters);
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var expectedSize = ByteCount + MinSize;
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if (data.Count != expectedSize)
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throw new ArgumentOutOfRangeException($"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 ReadHoldingRegistersResponseFrame Parse(Byte[] data) => new ReadHoldingRegistersResponseFrame(data);
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public static ReadHoldingRegistersResponseFrame Parse(ArraySegment<Byte> data) => new ReadHoldingRegistersResponseFrame(data);
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} |