291 lines
9.9 KiB
C#
291 lines
9.9 KiB
C#
///
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/// Copyright (c) 2018 Sensus Slovensko a.s.
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///
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using System;
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using System.Globalization;
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using System.Text;
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namespace TBF.Rig.RegisterReaders.SerialStream
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{
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public class DatastreamFrame
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{
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///
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/// Strobed value
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///
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public static decimal TestStartTimestampDec;
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///
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/// Stored values
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///
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public FrameFlags Flags;
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public DateTime DateTime; /// From PC
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public float RefFlow; /// [m3/h]
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public int Counter;
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const int MaxDataLength = 512;
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char[] data = new char[MaxDataLength];
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int dataLength;
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public byte CheckSum;
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public UInt32 VolumeRaw;
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public Int64 VolumeRawExt;
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public UInt32 Timestamp;
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public Int64 TimestampExt;
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///
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/// Calculated values
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///
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public double Volume(FrameFormat ff) { return (double)VolumeRawExt / ff.VolumeScaleFactor; }
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public decimal TimestampDec(FrameFormat ff) { return (decimal)TimestampExt / (decimal)ff.TimeScaleFactor; }
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public double VolumeDelta(FrameFormat ff, DatastreamFrame previous) { return (previous == null) ? 0 : Volume(ff) - previous.Volume(ff); }
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public decimal TimeDelta(FrameFormat ff) { return TimestampDec(ff) - TestStartTimestampDec; }
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public string Label()
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{
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if (Flags == FrameFlags.OK_TestStart) return "#### start test ####";
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else if (Flags == FrameFlags.OK_TestEnd) return "#### end of test ####";
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else return string.Empty;
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}
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static DatastreamFrame()
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{
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}
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public DatastreamFrame()
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{
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}
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/// <summary>
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/// Parses optical telegram and returns OptoTelegramRaw object
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/// </summary>
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/// <description>
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/// Create a configuration structure from a complete byte array
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///
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/// Telegram description:
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///
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/// AAAAAA[tab]BBBB[tab]CCCC[tab]DDDDDD[tab]EEEE[tab]FFFFFFFF[tab]GG[cr][lf] (42 bytes)
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///
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/// Data Comment Type Calculate to decimal
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/// ----------------------------------------------------------------
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/// AAAAAA EMF Int24 Value * 0.000000333
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/// BBBB Magnetic field Int16 Value
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/// CCCC Flow Int16 Value * 0.225 * Scalig factor
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/// DDDDDD Volume Int24 Value / 16000 * Scaling factor
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/// EEEE Impedance Int16 Value
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/// FFFFFFFF Timestamp Uint32 Value / 8192
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/// GG Checksum Byte
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/// ----------------------------------------------------------------
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///
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/// Example:
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/// FFFFFE 51EA 0000 65324E 0087 F6319DFF 86
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/// FFDD3A 51F9 0000 65324E 0088 F631A60B 45
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/// ...
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/// </description>
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/// <param name="data">A complete byte array data</param>
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/// <returns>true = telegram OK, false = telegram NOK</returns>
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public bool UpdateFromString(string frame, FrameFormat ff, int counter, ref Int64 volumeRawExtLast, ref Int64 timestampExtLast)
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{
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DateTime = DateTime.Now;
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Counter = counter;
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RefFlow = (float)Sequences.ProcessData.RefFlow.Val;
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if ((frame == null)
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|| (frame.Length < ff.FrameLength)
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|| (frame[ff.FrameLength - 2] != '\r')
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|| (frame[ff.FrameLength - 1] != '\n'))
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{
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Flags = FrameFlags.InvalidFrame;
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return false;
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}
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/// Copy data into the fixed size buffer
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dataLength = frame.Length - 2;
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for (int i = 0; i < Math.Min(MaxDataLength, dataLength); i++) data[i] = frame[i];
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bool f1 = true;
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bool f2 = true;
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bool f3 = true;
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if (ff.VolumeFieldFormat == FieldFormat.HexadecimalWindow)
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{
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f1 = UInt32.TryParse(frame.Substring(ff.VolumeFieldStart, ff.VolumeFieldLength), NumberStyles.HexNumber, CultureInfo.CurrentCulture, out VolumeRaw);
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///
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/// Cope with 'VolumeRaw' overflow
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///
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Int64 uncorrected = (Int64)(((UInt64)volumeRawExtLast & ff.VolumeWindowMask) | VolumeRaw);
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if (Math.Abs(uncorrected - volumeRawExtLast) <= ff.VolumeWrapThreshold)
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{
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VolumeRawExt = uncorrected;
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}
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else if (Math.Abs(uncorrected + ff.VolumeWrapIncrement - volumeRawExtLast) <= ff.VolumeWrapThreshold)
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{
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VolumeRawExt = uncorrected + ff.VolumeWrapIncrement;
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}
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else if (Math.Abs(uncorrected - ff.VolumeWrapIncrement - volumeRawExtLast) <= ff.VolumeWrapThreshold)
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{
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VolumeRawExt = uncorrected - ff.VolumeWrapIncrement;
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}
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else
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{
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VolumeRawExt = uncorrected;
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}
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volumeRawExtLast = VolumeRawExt; /// Update referenced value from calling routine
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}
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if (ff.TimeFieldFormat == FieldFormat.HexadecimalWindow)
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{
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f2 = UInt32.TryParse(frame.Substring(ff.TimeFieldStart, ff.TimeFieldLength), NumberStyles.HexNumber, CultureInfo.CurrentCulture, out Timestamp);
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///
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/// Cope with 'Timestamp' overflow
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///
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Int64 uncorrected = (Int64)(((UInt64)timestampExtLast & ff.TimeWindowMask) | Timestamp);
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if (Math.Abs(uncorrected - timestampExtLast) <= ff.TimeWrapThreshold)
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{
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TimestampExt = uncorrected;
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}
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else if (Math.Abs(uncorrected + ff.TimeWrapIncrement - timestampExtLast) <= ff.TimeWrapThreshold)
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{
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TimestampExt = uncorrected + ff.TimeWrapIncrement;
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}
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else if (Math.Abs(uncorrected - ff.TimeWrapIncrement - timestampExtLast) <= ff.TimeWrapThreshold)
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{
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TimestampExt = uncorrected - ff.TimeWrapIncrement;
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}
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else
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{
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TimestampExt = uncorrected;
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}
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timestampExtLast = TimestampExt; /// Update referenced value from calling routine
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}
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else if (ff.TimeFieldFormat == FieldFormat.None)
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{
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TimestampExt = ff.RawTimeIncrementPerFrame * counter;
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timestampExtLast = TimestampExt; /// Update referenced value from calling routine
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}
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f3 = byte.TryParse(frame.Substring(ff.FrameLength - 4, 2), NumberStyles.HexNumber, CultureInfo.CurrentCulture, out CheckSum);
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bool allOk = f1 && f2 && f3;
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Flags = allOk ? FrameFlags.OK : FrameFlags.InvalidFrame;
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return allOk;
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}
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/// <summary>
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/// Alternative to UpdateFromString(...) when data are flushed
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/// </summary>
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public bool UpdateFromStringDummy(string frame, FrameFormat ff)
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{
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DateTime = DateTime.Now;
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RefFlow = (float)Sequences.ProcessData.RefFlow.Val;
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if ((frame == null)
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|| (frame.Length < ff.FrameLength)
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|| (frame[ff.FrameLength - 2] != '\r')
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|| (frame[ff.FrameLength - 1] != '\n'))
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{
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Flags = FrameFlags.InvalidFrame;
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return false;
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}
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dataLength = 0;
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return true;
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}
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public void SetFlags(FrameFlags flags)
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{
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this.Flags = flags;
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}
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public string ToString(FrameFormat ff, DatastreamFrame previous)
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{
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if (Flags == FrameFlags.SyncError)
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{
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return "Sychronization error";
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}
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else if (Flags == FrameFlags.InvalidFrame)
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{
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return "Invalid telegram";
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}
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else /// if (flags == OptoTelegramFlags.OK || OptoTelegramFlags.OK_TestStart || OptoTelegramFlags.OK_TestEnd)
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{
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StringBuilder sb = new StringBuilder(MaxDataLength);
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for (int i = 0; i < Math.Min(MaxDataLength, dataLength); i++) sb.Append(data[i]);
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return string.Format("{0}:{1}:{2}.{3} #{4} : {5} Volume={6} Time={7} {8}",
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DateTime.Hour.ToString("D2"),
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DateTime.Minute.ToString("D2"),
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DateTime.Second.ToString("D2"),
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DateTime.Millisecond.ToString("D3"),
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Counter.ToString("D6"),
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sb.ToString(),
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Volume(ff),
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TimestampDec(ff),
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Label());
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}
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}
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/// <summary>
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/// Filter RefFlow data in an array of OptoTelegramRaw objects by a FIR filter:
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///
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/// kSize = 5, kSize2 = 2
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///
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/// i k
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/// ---------------------------------------------------------------------------
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/// 0 -5 filtered[0] = data[0]
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/// 1 -4 filtered[1] = data[1]
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/// 2 -3 filtered[2] = data[0]*k[0] + ... + data[4]*k[4]
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/// 3 -2 filtered[3] = data[1]*k[0] + ... + data[5]*k[4]
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/// 4 -1 filtered[4] = data[2]*k[0] + ... + data[6]*k[4]
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/// 5 0 data[0] = filtered[0], filtered[0] = data[3]*k[0] + ... + data[7]*k[4]
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/// 6 1 data[1] = filtered[1], filtered[1] = data[4]*k[0] + ... + data[8]*k[4]
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/// 7 ...
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/// </summary>
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/// <param name="optoData">array of OptoTelegramRaw objects</param>
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/// <param name="optoDataCount">number of objects to process</param>
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public static void FIRFilterFlow(DatastreamFrame[] optoData, int optoDataCount)
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{
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float[] kernel = new float[] { 0.1f, 0.2f, 0.4f, 0.2f, 0.1f };
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int kSize = kernel.Length;
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int kSize2 = kernel.Length / 2;
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float[] filtered = new float[kSize];
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for (int i = 0; i < optoDataCount; i++)
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{
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int k = i - kSize;
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if (k >= 0) optoData[k].RefFlow = filtered[i % kSize];
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if (i < kSize2 || i >= optoDataCount - kSize2)
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{
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filtered[i % kSize] = optoData[i].RefFlow;
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}
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else
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{
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float weoightedSum = 0;
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for (int j = -kSize2; j <= kSize2; j++)
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weoightedSum += optoData[i + j].RefFlow * kernel[j + kSize2];
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filtered[i % kSize] = weoightedSum;
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}
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}
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for (int k = optoDataCount - kSize; k < optoDataCount; k++)
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{
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if (k >= 0) optoData[k].RefFlow = filtered[k % kSize];
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}
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}
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}
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}
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