private void CsacService_ValueChanged(CsacMeasurement newMeasurement)
{
DispatcherHelper.CheckBeginInvokeOnUI(() =>
{
processMeasurement(newMeasurement);
});
}
private void processMeasurement(CsacMeasurement measurement)
{
datapoints.Add(measurement);
MeasurementsReceived = datapoints.Count;
if (datapoints.Count > 1)
{
var lastButOneMeasurement = datapoints[datapoints.Count - 2];
if ((DateTimeOffset.Now - lastButOneMeasurement.Timestamp).TotalSeconds > 64)
{
// The last data is too old. Reset the counters...
lastDatapoint = datapoints.Count - 1;
averageCrankRPM.Clear();
averageWheelRPM.Clear();
}
else
{
var wheelRevsDelta = measurement.CumulativeWheelRevolutions - lastButOneMeasurement.CumulativeWheelRevolutions;
double timeDelta;
double wheelRPM;
if (measurement.LastWheelEventTime >= lastButOneMeasurement.LastWheelEventTime)
{
timeDelta = (measurement.LastWheelEventTime - lastButOneMeasurement.LastWheelEventTime) / 1024.0;
}
else
{
timeDelta = (65536 - measurement.LastWheelEventTime + lastButOneMeasurement.LastWheelEventTime) / 1024.0;
}
if (timeDelta > 0)
{
wheelRPM = wheelRevsDelta / (timeDelta / 60);
}
else
{
wheelRPM = 0;
}
CycleSpeed = (wheelRPM * 2.4 * 60) / 1000;
averageWheelRPM.Add(wheelRPM);
InstantaneousWheelRPM = wheelRPM;
WheelRPMAverage = averageWheelRPM.Average();
var crankRevsDelta = measurement.CumulativeCrankRevolutions - lastButOneMeasurement.CumulativeCrankRevolutions;
double crankRPM;
if (measurement.LastCrankEventTime >= lastButOneMeasurement.LastCrankEventTime)
{
timeDelta = (measurement.LastCrankEventTime - lastButOneMeasurement.LastCrankEventTime) / 1024.0;
}
else
{
timeDelta = (65536 - measurement.LastCrankEventTime + lastButOneMeasurement.LastCrankEventTime) / 1024.0;
}
if (timeDelta > 0)
{
crankRPM = crankRevsDelta / (timeDelta / 60);
}
else
{
crankRPM = 0;
}
averageCrankRPM.Add(crankRPM);
InstantaneousCrankRPM = crankRPM;
CrankRPMAverage = averageCrankRPM.Average();
}
}
}
