104 lines
2.8 KiB
C#
104 lines
2.8 KiB
C#
///
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/// Copyright (c) 2013-2015 Sensus Metering Systems
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///
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using System;
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using log4net;
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using TBF.Boxes;
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namespace TBF.BenchControl.Elde.RegisterReader
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{
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public class ReadRegisterOp : IOperation
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{
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private static readonly ILog log = LogManager.GetLogger(typeof(ReadRegisterOp));
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public override string ToString() { return string.Format("ReadRegisterOp({0})", reader.Name); }
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/// Set by the constructor
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readonly RegisterReader reader;
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IntBox pulses;
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int lastPulses;
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bool lastPulsesValid;
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IntBox refPulses;
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/// <summary>
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/// Events: Event.ReadRegisterDone or Event.Error
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/// </summary>
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/// <param name="reader">Register reader reference</param>
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/// <param name="pulses">Reference to a field with the water meter pulses</param>
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public ReadRegisterOp(GenericDevices.IRegisterReader reader, ref IntBox pulses)
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{
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this.reader = reader as RegisterReader;
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if (reader == null) throw new ArgumentNullException("reader is null or it is not Elde");
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this.pulses = pulses;
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lastPulsesValid = false;
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log.Debug(this.ToString());
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}
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/// <summary>
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/// Events: Event.ReadRegisterDone or Event.Error
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/// </summary>
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/// <param name="reader">Register reader reference</param>
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/// <param name="pulses">Reference to a Box with the water meter pulses</param>
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/// <param name="refPulses">Reference to a Box with the reference flow meter pulses synchronized with the water meter</param>
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public ReadRegisterOp(GenericDevices.IRegisterReader reader, ref IntBox pulses, ref IntBox refPulses)
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: this(reader, ref pulses)
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{
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this.refPulses = refPulses;
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log.Debug(this.ToString());
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}
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private void ReadPulses()
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{
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if (!lastPulsesValid)
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{
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lastPulses = (int)reader.ControlBoard.WMeterPulses(reader.Position);
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lastPulsesValid = true;
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}
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else
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{
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UInt16 lowerWord = reader.ControlBoard.WMeterPulses(reader.Position);
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int uncorrected = (int)(((uint)lastPulses & 0xFFFF0000) | lowerWord);
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if (Math.Abs(uncorrected - lastPulses) <= Int16.MaxValue)
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{
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lastPulses = uncorrected;
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}
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else if (Math.Abs(uncorrected + 65536 - lastPulses) <= Int16.MaxValue)
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{
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lastPulses = uncorrected + 65536;
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}
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else if (Math.Abs(uncorrected - 65536 - lastPulses) <= Int16.MaxValue)
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{
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lastPulses = uncorrected - 65536;
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}
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}
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pulses.Val = lastPulses;
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if (refPulses != null)
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{
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refPulses.Val = (int)reader.ControlBoard.EtPulses(reader.Position);
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}
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}
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/// <summary>Start this operation</summary>
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public void Start()
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{
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ReadPulses();
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}
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/// <summary>Run this operation</summary>
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/// <returns>eventDone</returns>
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public Event Run()
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{
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ReadPulses();
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return Event.ReadRegisterDone;
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}
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/// <summary>Stop this operation</summary>
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public void Stop()
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{
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}
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}
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}
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