mirror of
https://github.com/evopro-ag/Sharp7Reactive.git
synced 2025-12-16 03:42:51 +00:00
imported Sharp7.Rx
This commit is contained in:
Thomas Stangl
301
Sharp7.Rx/Sharp7Plc.cs
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301
Sharp7.Rx/Sharp7Plc.cs
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using System;
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using System.Reactive;
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using System.Reactive.Linq;
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using System.Reactive.Subjects;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using Sharp7.Rx.Enums;
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using Sharp7.Rx.Interfaces;
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using Sharp7.Rx.Resources;
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namespace Sharp7.Rx
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{
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public class Sharp7Plc : IPlc
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{
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private readonly string ipAddress;
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private readonly int rackNumber;
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private readonly int cpuMpiAddress;
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private readonly S7VaraibleNameParser varaibleNameParser;
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private bool disposed;
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private ISubject<Unit> disposingSubject = new Subject<Unit>();
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private IS7Connector s7Connector;
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public Sharp7Plc(string ipAddress, int rackNumber, int cpuMpiAddress)
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{
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this.ipAddress = ipAddress;
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this.rackNumber = rackNumber;
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this.cpuMpiAddress = cpuMpiAddress;
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varaibleNameParser = new S7VaraibleNameParser();
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}
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public IObservable<ConnectionState> ConnectionState { get; private set; }
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public async Task<bool> InitializeAsync()
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{
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s7Connector = new Sharp7Connector(ipAddress, rackNumber, cpuMpiAddress);
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ConnectionState = s7Connector.ConnectionState;
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await s7Connector.InitializeAsync();
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#pragma warning disable 4014
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Task.Run(async () =>
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{
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try
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{
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await s7Connector.Connect();
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}
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catch (Exception)
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{
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}
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});
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#pragma warning restore 4014
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return true;
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}
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public Task<TValue> GetValue<TValue>(string variableName)
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{
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return GetValue<TValue>(variableName, CancellationToken.None);
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}
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public async Task<TValue> GetValue<TValue>(string variableName, CancellationToken token)
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{
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var address = varaibleNameParser.Parse(variableName);
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if (address == null) throw new ArgumentException("Input variable name is not valid", nameof(variableName));
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if (typeof(TValue) == typeof(bool))
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{
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var b = await s7Connector.ReadBit(address.Operand, address.Start, address.Bit, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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return (TValue)(object)b;
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}
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if (typeof(TValue) == typeof(int))
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{
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var b = await s7Connector.ReadBytes(address.Operand, address.Start, address.Length, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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if (address.Length == 2)
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return (TValue)(object)((b[0] << 8) + b[1]);
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if (address.Length == 4)
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{
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Array.Reverse(b);
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return (TValue)(object)Convert.ToInt32(b);
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}
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throw new InvalidOperationException($"length must be 2 or 4 but is {address.Length}");
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}
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if (typeof(TValue) == typeof(ulong))
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{
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var b = await s7Connector.ReadBytes(address.Operand, address.Start, address.Length, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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Array.Reverse(b);
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return (TValue)(object)Convert.ToUInt64(b);
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}
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if (typeof(TValue) == typeof(short))
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{
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var b = await s7Connector.ReadBytes(address.Operand, address.Start, 2, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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return (TValue)(object)(short)((b[0] << 8) + b[1]);
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}
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if (typeof(TValue) == typeof(byte) || typeof(TValue) == typeof(char))
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{
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var b = await s7Connector.ReadBytes(address.Operand, address.Start, 1, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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return (TValue)(object)b[0];
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}
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if (typeof(TValue) == typeof(byte[]))
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{
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var b = await s7Connector.ReadBytes(address.Operand, address.Start, address.Length, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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return (TValue)(object)b;
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}
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if (typeof(TValue) == typeof(double) || typeof(TValue) == typeof(float))
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{
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var bytes = await s7Connector.ReadBytes(address.Operand, address.Start, 4, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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var d = Convert.ToSingle(bytes);
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return (TValue)(object)d;
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}
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if (typeof(TValue) == typeof(string))
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{
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if (address.Type == DbType.String)
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{
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var bytes = await s7Connector.ReadBytes(address.Operand, address.Start, 2, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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var stringLength = bytes[1];
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var stringStartAddress = (ushort)(address.Start + 2);
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var stringInBytes = await s7Connector.ReadBytes(address.Operand, stringStartAddress, stringLength, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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return (TValue)(object)Encoding.ASCII.GetString(stringInBytes);
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}
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else
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{
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var stringInBytes = await s7Connector.ReadBytes(address.Operand, address.Start, address.Length, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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return (TValue)(object)Encoding.ASCII.GetString(stringInBytes).Trim();
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}
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}
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throw new InvalidOperationException(string.Format("type '{0}' not supported.", typeof(TValue)));
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}
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public Task SetValue<TValue>(string variableName, TValue value)
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{
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return SetValue(variableName, value, CancellationToken.None);
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}
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public async Task SetValue<TValue>(string variableName, TValue value, CancellationToken token)
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{
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var address = varaibleNameParser.Parse(variableName);
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if (address == null) throw new ArgumentException("Input variable name is not valid", "variableName");
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if (typeof(TValue) == typeof(bool))
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{
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await s7Connector.WriteBit(address.Operand, address.Start, address.Bit, (bool)(object)value, address.DbNr, token);
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}
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else if (typeof(TValue) == typeof(int) || typeof(TValue) == typeof(short))
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{
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byte[] bytes;
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if (address.Length == 4)
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bytes = BitConverter.GetBytes((int)(object)value);
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else
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bytes = BitConverter.GetBytes((short)(object)value);
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Array.Reverse(bytes);
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await s7Connector.WriteBytes(address.Operand, address.Start, bytes, address.DbNr, token);
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}
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else if (typeof(TValue) == typeof(byte) || typeof(TValue) == typeof(char))
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{
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var bytes = new[] { Convert.ToByte(value) };
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await s7Connector.WriteBytes(address.Operand, address.Start, bytes, address.DbNr, token);
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}
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else if (typeof(TValue) == typeof(byte[]))
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{
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await s7Connector.WriteBytes(address.Operand, address.Start, (byte[])(object)value, address.DbNr, token);
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}
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else if (typeof(TValue) == typeof(float))
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{
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var buffer = new byte[sizeof(float)];
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S7.SetRealAt(buffer, 0, (float)(object)value);
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await s7Connector.WriteBytes(address.Operand, address.Start, buffer, address.DbNr, token);
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}
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else if (typeof(TValue) == typeof(string))
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{
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var stringValue = value as string;
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if (stringValue == null) throw new ArgumentException("Value must be of type string", "value");
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var bytes = Encoding.ASCII.GetBytes(stringValue);
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Array.Resize(ref bytes, address.Length);
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if (address.Type == DbType.String)
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{
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var bytesWritten = await s7Connector.WriteBytes(address.Operand, address.Start, new[] { (byte)address.Length, (byte)bytes.Length }, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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if (bytesWritten == 2)
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{
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var stringStartAddress = (ushort)(address.Start + 2);
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token.ThrowIfCancellationRequested();
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await s7Connector.WriteBytes(address.Operand, stringStartAddress, bytes, address.DbNr, token);
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}
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}
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else
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{
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await s7Connector.WriteBytes(address.Operand, address.Start, bytes, address.DbNr, token);
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token.ThrowIfCancellationRequested();
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}
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}
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else
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{
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throw new InvalidOperationException($"type '{typeof(TValue)}' not supported.");
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}
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}
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public IObservable<TValue> CreateNotification<TValue>(string variableName, TransmissionMode transmissionMode, TimeSpan cycle)
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{
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var address = varaibleNameParser.Parse(variableName);
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if (address == null) throw new ArgumentException("Input variable name is not valid", nameof(variableName));
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if (cycle < TimeSpan.FromMilliseconds(100))
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cycle = TimeSpan.FromMilliseconds(100);
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var notification = ConnectionState.FirstAsync().Select(states => states == Enums.ConnectionState.Connected)
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.SelectMany(async connected =>
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{
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var value = default(TValue);
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if (connected)
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{
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value = await GetValue<TValue>(variableName, CancellationToken.None);
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}
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return new
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{
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HasValue = connected,
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Value = value
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};
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})
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// TODO: .RepeatAfterDelay(cycle)
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// TODO: .LogAndRetryAfterDelay(Logger, cycle, StringResources.StrLogErrorReadingDataFromPlc)
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.TakeUntil(disposingSubject)
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.Where(union => union.HasValue)
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.Select(union => union.Value);
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if (transmissionMode == TransmissionMode.Cyclic)
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return notification;
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if (transmissionMode == TransmissionMode.OnChange)
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return notification.DistinctUntilChanged();
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throw new ArgumentException("Transmission mode can either be Cyclic or OnChange", nameof(transmissionMode));
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}
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public void Dispose()
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{
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Dispose(true);
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}
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protected virtual void Dispose(bool disposing)
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{
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if (!disposed)
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{
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if (disposing)
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{
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if (disposingSubject != null)
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{
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disposingSubject.OnNext(Unit.Default);
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disposingSubject.OnCompleted();
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var disposable = (disposingSubject as IDisposable);
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if (disposable != null) disposable.Dispose();
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disposingSubject = null;
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}
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if (s7Connector != null)
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{
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s7Connector.Disconnect().Wait();
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s7Connector.Dispose();
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s7Connector = null;
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}
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}
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disposed = true;
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}
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}
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~Sharp7Plc()
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{
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Dispose(false);
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}
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}
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}
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