69 lines
2.6 KiB
C#
69 lines
2.6 KiB
C#
using InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Accessors;
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using InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Replies;
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using static InnovEnergy.Lib.Protocols.Modbus.Protocol.FunctionCode;
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namespace InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Commands;
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using UInt16s = IReadOnlyList<UInt16>;
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using MbFc = MbByte<FunctionCode>;
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internal class WriteRegistersCommandFrame : ModbusFrame
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{
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internal new const Int32 MinSize = 7;
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public MbAddress WriteAddress => Data.AddressAt(2);
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public MbWord NbOfRegisters => Data.WordAt(4);
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public MbByte ByteCount => Data.ByteAt(6);
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public MbWords RegistersToWrite => Data.WordsAt(7);
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public Int32 ExpectedResponseSize => WriteRegistersResponseFrame.ExpectedSize();
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public WriteRegistersCommandFrame(Byte slave, UInt16 writeAddress, UInt16s registersToWrite) : base(MinSize + registersToWrite.Count * 2)
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{
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var n = registersToWrite.Count;
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SlaveAddress .Set(slave);
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FunctionCode .Set(WriteMultipleRegisters);
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WriteAddress .Set(writeAddress);
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NbOfRegisters .Set(n);
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ByteCount .Set(2 * n);
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RegistersToWrite.Set(registersToWrite);
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}
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private WriteRegistersCommandFrame(ArraySegment<Byte> data) : base(data)
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{
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if (data.Count < MinSize)
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throw new ArgumentOutOfRangeException($"Expecting an array of size {MinSize} or more!", nameof(data));
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AssertFunctionCode(WriteMultipleRegisters);
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var expectedSize = ByteCount + MinSize;
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if (data.Count != expectedSize)
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throw new ArgumentException($"Expecting an array of size {expectedSize}", nameof(data));
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if (ByteCount != RegistersToWrite.Count * 2)
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throw new ArgumentException(nameof(RegistersToWrite));
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}
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public WriteRegistersResponseFrame VerifyResponse(WriteRegistersResponseFrame response)
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{
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if (response.SlaveAddress != SlaveAddress)
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throw new UnexpectedResponseFieldException(nameof(response.SlaveAddress), SlaveAddress.ToString(), response.SlaveAddress);
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if (response.NbWritten != NbOfRegisters)
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throw new UnexpectedResponseFieldException(nameof(response.NbWritten), NbOfRegisters, response.NbWritten);
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if (response.WriteAddress != WriteAddress)
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throw new UnexpectedResponseFieldException(nameof(response.WriteAddress), WriteAddress, response.WriteAddress);
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return response;
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}
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public static WriteRegistersCommandFrame Parse(ArraySegment<Byte> data)
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{
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return new WriteRegistersCommandFrame(data);
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}
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} |